SCHEDULE 14A

Proxy Statement Pursuant to Section 14(A) of the

Securities Exchange Act of 1934

Filed by the Registrant  x☒                             Filed by a Party other than the Registrant  ¨☐

Check the appropriate box:

AMG FUNDS I

(Name of Registrant as Specified In Its Charter)

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

Payment of Filing Fee (Check the appropriate box):

March 11, 2015May 7, 2021

AMG FUNDS I

AMG GW&K CORE BONDFQ TAX-MANAGED U.S. EQUITY FUND

(FORMERLY AMG MANAGERS TOTAL RETURN BOND FUND)

Dear Shareholder:

I am writing to you about an important proposalproposals relating to AMG GW&K Core BondFQ Tax-Managed U.S. Equity Fund (formerly AMG Managers Total Return Bond Fund) (the “Fund”), a series of AMG Funds I (“AMG Funds I” or the “Trust”). This proxy statement asks you to consider and vote on a proposal the following three proposals:

Veritas has been an affiliate of the Investment Manager and AMG since 2014 and currently serves as subadviser to two other funds in the AMG Funds Family of Funds.

We are asking shareholders to approve Veritas, an affiliate of the Investment Manager, to serve as the subadviser to the Fund. Veritas has been appointed to act as the Fund’s subadviser on an interim basis pursuant to an interim subadvisory agreement beginning on May 21, 2021, replacing the existing subadviser, First Quadrant, L.P. (“First Quadrant”), as subadviser to the Fund. Under applicable law, if shareholders do not approve the new subadvisory agreement with Veritas on or before October 18, 2021, Veritas may no longer be able to act as subadviser to the Fund and the Board of Trustees may consider other alternatives for the Fund, including possible liquidation of the Fund. The fee rate paid to Veritas under the interim subadvisory agreement is 0.09% lower than the fee rate that is paid to First Quadrant under the existing subadvisory agreement and is paid by the Investment Manager. The fee rate paid to Veritas under the new subadvisory agreement is 0.11% lower than the fee rate that is paid to First Quadrant and is paid by the Investment Manager. The approval of the new subadvisory agreement will not increase the management fee rate borne by Fund shareholders.

In connection with the hiring of Veritas, the Board of Trustees approved the following fee changes for the Fund, all of which will be implemented upon the effectiveness of the new subadvisory agreement and will result in the overall reduction of the Fund’s net expense ratios as compared with the Fund’s current fee structure: (i) the management fee for the Fund will be reduced from 0.70% to 0.67%; and (ii) the Fund’s existing contractual expense limitation agreement with the Investment Manager will be replaced with a new contractual expense limitation agreement with the Investment Manager pursuant to which the Investment Manager will agree, through at least March 1, 2023, to limit total annual operating expenses (exclusive of taxes, interest (including interest incurred in connection with bank and custody overdrafts and in connection with securities sold short), shareholder servicing fees, distribution and service (12b-1) fees, brokerage commissions and other transaction costs, dividends payable with respect to securities sold short, acquired fund fees and expenses, and extraordinary expenses) of the Fund to the annual rate of 0.88% of the Fund’s average daily net assets, subject to later reimbursement by the Fund in certain circumstances. The net expense ratios for the Fund’s Class N and Class I shares will be reduced from 1.14% to 1.13% and 0.89% to 0.88%, respectively.

In connection with the hiring of Veritas, effective May 21, 2021, the Fund will (i) change its name from AMG FQ Tax-Managed U.S. Equity Fund to AMG Veritas Global Focus Fund, (ii) make changes to its investment objective, principal investment strategies and principal risks, and (iii) replace its existing benchmark index with the MSCI World Index. For more information regarding these and other changes to the Fund, please see the supplement dated March 19, 2021 to the Fund’s prospectus dated February 1, 2021, which is attached as Appendix B to the accompanying proxy statement. Except with respect to the Fund’s diversification status, shareholders are not being asked to vote on the changes to the Fund’s principal investment strategies.

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In addition to the new subadvisory agreement between AMG Funds LLCthe Investment Manager and Gannett Welsh & Kotler, LLCVeritas with respect to the Fund and in connection with the hiring of Veritas, Fund shareholders are being asked to approve a change in the Fund’s sub-classification under the 1940 Act from “diversified” to “non-diversified.” The proposed change will facilitate the management of the Fund by the Investment Manager and Veritas.

Lastly, Fund shareholders are being asked to approve a modified “manager-of-managers” structure for the Fund. The Fund currently operates under a “manager-of-managers” structure pursuant to an order issued by the Securities and Exchange Commission (the “Proposal”“SEC”) that permits the Investment Manager, subject to the approval of the Board of Trustees, but without the need for shareholder approval, to enter into and materially amend subadvisory agreements with unaffiliated subadvisers (the “AMGF Order”). The modified “manager-of-managers” structure would permit the Investment Manager, subject to the approval of the Board of Trustees, but without the need for shareholder approval, to enter into and materially amend subadvisory agreements with unaffiliated and affiliated subadvisers subject to certain terms and conditions established by the SEC. In addition, the SEC’s terms for using the modified manager-of-managers structure permit funds to disclose fees paid to subadvisers on an aggregate, rather than individual, basis. If shareholders approve the proposal, and if the Fund were to have multiple subadvisers, the Fund would not be permitted to disclose fees paid to the subadvisers on an aggregate, rather than individual, basis until after it applied for and received approval from the SEC of an amendment to the AMGF Order.

A special meeting of shareholders (the “Meeting”) of the Fund has been scheduled for May 4, 2015June 17, 2021 to vote on this matter.these matters. If you are a shareholder of record of the Fund as of the close of business on February 27, 2015,April 28, 2021, you are entitled to vote at the Meeting and any adjournment(s) or postponement(s) of all or any portion of the Meeting, even if you no longer own your shares.

Pursuant to these materials, you are being asked to vote on the Proposal,proposals, as noted above.For the reasons discussed in the enclosed materials, the Board of Trustees of AMG Funds I recommends that you vote “FOR” the Proposal.“FOR” each proposal.

You can vote in one of four ways:

We encourage you to vote over the Internet or by telephone using the voting control number that appears on your proxy card.

Please take the time to carefully consider and vote on thisthese important proposal.proposals. Please also read the enclosed information carefully before voting. If you have questions, please call D.F. King & Co., Inc., an ASTOne Company,AST Fund Solutions, the Fund’s proxy solicitor, , toll-free at 1-877-732-3621.866-406-2283.

Proxies may be revoked prior to the Meeting by timely executing and submitting a revised proxy (following the methods noted above), by giving written notice of revocation to the Fund prior to the Meeting, or by voting in person at the Meeting.

We appreciate your participation and prompt response in this matter and thank you for your continued support.

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PROMPT EXECUTION AND RETURN OF THE ENCLOSED PROXY CARD IS REQUESTED. A SELF-ADDRESSED, POSTAGE-PAID ENVELOPE IS ENCLOSED FOR YOUR CONVENIENCE ALONG WITH INSTRUCTIONS ON HOW TO VOTE OVER THE INTERNET OR BY TELEPHONE SHOULD YOU PREFER TO VOTE BY ONE OF THOSE METHODS.

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QUESTIONS AND ANSWERS

The following “Questions and Answers” section is a summary and is not intended to be as detailed as the discussion found in the proxy materials. For this reason, the information is qualified in its entirety by reference to the enclosed proxy statement to shareholders (“Proxy Statement”).

Proposal 1: Approval of New Subadvisory Agreement

Proposal 1 relates to a proposed new subadvisory agreement between the Investment Manager and Veritas Asset Management LLP (“Veritas”), an affiliate of the Investment Manager and Affiliated Managers Group, Inc. (“AMG”), the ultimate parent company of the Investment Manager, with respect to the Fund. At a meeting held on March 17-18, 2021, and based upon the recommendation of the Investment Manager and other factors, the Board approved the termination of the subadvisory agreement with First Quadrant, L.P. (“First Quadrant”), the current subadviser of the Fund, and approved the appointment of Veritas as the subadviser to the Fund on an interim basis to replace First Quadrant, with Veritas’ services beginning on May 21, 2021. Veritas will initially serve as interim subadviser pursuant to an interim subadvisory agreement as permitted by Rule 15a-4 under the Investment Company Act of 1940, as amended (the “1940 Act”). As required by applicable law, the interim subadvisory agreement will be effective until the earlier of 150 days after the termination of the subadvisory agreement with First Quadrant or the approval of a new subadvisory agreement between the Investment Manager and Veritas by shareholders of the Fund. At the meeting held on March 17-18, 2021, the Board also approved the longer-term appointment of Veritas as the subadviser to the Fund and the adoption of a new subadvisory agreement between the Investment Manager and Veritas, subject to shareholder approval. In accordance with Rule 15a-4 under the 1940 Act, shareholders of the Fund are being asked to approve the new subadvisory agreement on or before October 18, 2021 in order to ensure that Veritas serves as subadviser to the Fund on an uninterrupted basis following that date. For the reasons discussed in the Proxy Statement, the Board recommends that you vote “FOR” Proposal 1.

Proposal 2: Approval of a Change in the Fund’s Sub-Classification under the 1940 Act from “Diversified” to “Non-Diversified”

Proposal 2 relates to a proposed change in the Fund’s sub-classification under the 1940 Act from “diversified” to “non-diversified.” As a non-diversified fund, the Fund would have increased flexibility to invest a greater percentage of the Fund’s assets in the securities of fewer issuers, including any one issuer, than it currently does as a diversified fund. If Proposal 2 is approved, non-diversified fund risk would become a principal investment risk of the Fund, as its ability to invest more of its assets in the securities of fewer issuers would increase its vulnerability to factors affecting a single investment. Changing the Fund’s sub-classification from a diversified fund to a non-diversified fund requires shareholder approval. If shareholders approve this change, the Fund’s fundamental investment policy with respect to diversification of investments will be eliminated to reflect that the Fund is non-diversified.For the reasons discussed in the Proxy Statement, the Board recommends that you vote “FOR” Proposal 2.

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Proposal 3: Approval of a Modified Manager-of-Managers Structure

Proposal 3 relates to a proposed modified “manager-of-managers” structure for the Fund. Under Section 15(a) of the 1940 Act, an investment adviser to a mutual fund generally cannot enter into or materially amend a subadvisory agreement without obtaining shareholder approval, but the Fund is currently operating under a manager-of-managers structure pursuant to an exemptive order (the “AMGF Order”) issued by the Securities and Exchange Commission (the “SEC”) that enables the Investment Manager, subject to the approval of the Board, but without the need for shareholder approval, to enter into and materially amend subadvisory agreements with unaffiliated subadvisers. The modified “manager-of-managers” structure would permit the Investment Manager, subject to the approval of the Board, but without the need for shareholder approval, to enter into and materially amend subadvisory agreements with unaffiliated and affiliated subadvisers in reliance on the terms of the exemptive order obtained by Carillon Tower Advisers, Inc., et al., Investment Company Release Nos. 33464 (May 2, 2019) (notice) and 33494 (May 29, 2019) (order) (the “Carillon Order”). In addition, the Carillon Order permits funds to disclose fees paid to subadvisers on an aggregate, rather than individual, basis. If shareholders approve Proposal 3, and if the Fund were to have multiple subadvisers, the Fund would not be permitted to disclose fees paid to the subadvisers on an aggregate, rather than individual, basis until after it applied for and received approval from the SEC of an amendment to the AMGF Order. Fund shareholder approval is being sought to provide the Fund with flexibility to operate under the Carillon Order manager-of-managers structure. For the reasons discussed in the Proxy Statement, the Board recommends that you vote “FOR” Proposal 3.

Under First Quadrant’s management of the Fund’s portfolio, the Fund’s investment objective is “to achieve long-term after-tax returns for investors”. Under Veritas’ management of the Fund’s portfolio, the Fund’s investment objective will be to seek “to provide long-term capital appreciation”. In addition to the foregoing differences, Veritas’ investment strategies will be different than First Quadrant’s investment strategies. Under First Quadrant’s management of the Fund’s portfolio, the Fund invests, under normal circumstances, at least 80% of its net assets, plus the amount of any borrowings for investment purposes, in equity securities of issuers located in the U.S. Under Veritas’ management of the Fund, the Fund intends to invest in equity securities of a relatively select group of global companies. Additionally, under normal circumstances, the Fund will invest at least 35% (or if conditions are not favorable, in the view of Veritas, at least 25%) of its net assets in investments economically tied to countries other than the U.S., and the Fund will hold investments economically tied to a minimum of three countries other than the U.S.

Fund shareholders are also being asked to approve a change to the Fund’s diversification status, as described in Proposal 2.

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If shareholders do not approve Proposal 2, the Fund will continue to operate as a diversified fund.

If shareholders do not approve Proposal 3, the Fund will continue to operate under a manager-of-managers structure pursuant to the AMGF Order and the Fund will continue to be required to seek the approval of its shareholders to enter into or materially amend subadvisory agreements with affiliated subadvisers.

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Proxies may be revoked prior to the Meeting by timely executing and submitting a revised proxy (following the methods noted above), by giving written notice of revocation to the Fund prior to the Meeting, or by voting in person at the Meeting.

PROMPT VOTING IS REQUESTED.

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AMG FUNDS I

AMG GW&K CORE BONDFQ TAX-MANAGED U.S. EQUITY FUND

(FORMERLY AMG MANAGERS TOTAL RETURN BOND FUND)

NOTICE OF SPECIAL MEETING OF SHAREHOLDERS

TO BE HELD ON MAY 4, 2015JUNE 17, 2021

Notice is hereby given that a special meeting of shareholders (the “Meeting”) of AMG GW&K Core BondFQ Tax-Managed U.S. Equity Fund (formerly AMG Managers Total Return Bond Fund) (the “Fund”), a series of AMG Funds I (“AMG Funds I” or the “Trust”), will be held on June 17, 2021 at the offices of AMG Funds LLC (the “Investment Manager”), 800 Connecticut Avenue, Norwalk, Connecticut 06854 on May 4, 2015 at 2:11:00 p.m.a.m. Eastern Time for the purposes listed below:below. In light of the COVID-19 pandemic, the Meeting will be a virtual meeting held via telephone only.

Proposal Summary

After careful consideration, the Trust’s Board of Trustees (the “Board” or the “Trustees”) unanimously recommends that shareholders vote “FOR” theeach proposal.

Shareholders of record at the close of business on February 27, 2015April 28, 2021 are entitled to notice of, and to vote at, the Meeting, even if any such shareholders no longer own shares.

If you wish to attend the Meeting, please register by sending an email to attendameeting@astfinancial.com and provide us with your full name and address in order to receive the conference call dial-in information. Please use the email subject line “AMG FQ Tax-Managed U.S. Equity Fund”, and include in your email your full name along with your request for the conference line number. That number will be sent back to you, allowing you to call into the meeting. We encourage you to vote your shares prior to the Meeting.

We call your attention to the accompanying proxy statement. You are requested toThe Fund requests that you complete, date, and sign the enclosed proxy card and return it promptly in the envelope provided for that purpose. Your proxy card also provides instructions for voting by telephone or over the Internet if you wish to take advantage of these voting options. Proxies may be revoked prior to the Meeting by timely executing and submitting a revised proxy (following the methods noted above), by giving written notice of revocation to the Fund prior to the Meeting, or by voting in person at the Meeting. Please call D.F. King & Co., Inc., an ASTOne Company,AST Fund Solutions, the Fund’s proxy solicitor, toll-free at 1-877-732-3621866-406-2283 if you have any questions relating to attending the Meeting in person or your vote instructions.

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IMPORTANT NOTICE REGARDING THE AVAILABILITY OF PROXY MATERIALS

FOR THE MEETING TO BE HELD ON MAY 4, 2015JUNE 17, 2021

This Proxy Statement and the accompanying Notice of Special Meeting of Shareholders are available at the website listed on your proxy card. In addition, shareholders can find important information about the Fund in the Fund’s annual report, dated October 31, 2014,2020, including financial reports for the fiscal year ended October 31, 2014, and in the Fund’s semi-annual report, dated April 30, 2014.2020. You may obtain copies of these reports without charge, upon request, by writing to AMG Funds LLC, 800One Stamford Plaza, 263 Tresser Boulevard, Suite 949, Stamford, Connecticut Avenue, Norwalk, Connecticut 06854,06901, or by calling 1-800-835-3879,1-800-548-4539, or on the Fund’sFunds’ website atwww.amgfunds.com.

YOUR VOTE IS VERY IMPORTANT TO US REGARDLESS OF THE NUMBER OF VOTESSHARES YOU HOLD. SHAREHOLDERS WHOIF YOU DO NOT EXPECT TO PERSONALLY ATTEND THE MEETING ARE REQUESTED TO, PLEASE COMPLETE, SIGN, DATE AND RETURN THE ACCOMPANYING PROXY CARD IN THE ENCLOSED ENVELOPE, WHICH NEEDS NO POSTAGE IF MAILED IN THE UNITED STATES. IT IS IMPORTANT THAT YOUR PROXY CARD BE RETURNED PROMPTLY.

FOR YOUR CONVENIENCE, YOU MAY ALSO VOTE BY TELEPHONE OR OVER THE INTERNET BY FOLLOWING THE INSTRUCTIONS ON THE PROXY CARD. IF YOU VOTE BY TELEPHONE OR OVER THE INTERNET, PLEASE DO NOT RETURN YOUR PROXY CARD UNLESS YOU ELECT TO CHANGE YOUR VOTE.

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AMG FUNDS I

AMG GW&K CORE BONDFQ TAX-MANAGED U.S. EQUITY FUND

(FORMERLY AMG MANAGERS TOTAL RETURN BOND FUND)

PROXY STATEMENT

SPECIAL MEETING OF SHAREHOLDERS

TO BE HELD ON MAY 4, 2015JUNE 17, 2021

This proxy statement (“Proxy Statement”) and enclosed notice and proxy card are being furnished in connection with the solicitation of proxies by the Trust’s Board of Trustees (the “Board” or the “Trustees”) of AMG Funds I (“AMG Funds I” or the “Trust”) and its series, AMG GW&K Core BondFQ Tax-Managed U.S. Equity Fund (formerly AMG Managers Total Return Bond Fund) (the “Fund”). The proxies are being solicited for use at a special meeting of shareholders of the Fund to be held on June 17, 2021 at the offices of AMG Funds LLC (the “Investment Manager”), 800 Connecticut Avenue, Norwalk, Connecticut 06854 on May 4, 2015 at 2:11:00 p.m.a.m. Eastern Time, and at any and all adjournments or postponements of all or any portion thereof (the “Meeting”). In light of the COVID-19 pandemic, the Meeting will be a virtual meeting held via telephone only.

The Board has called the Meeting and is soliciting proxies from shareholders of the Fund for the purposes listed below:

Proposal Summary

This Proxy Statement and the accompanying notice and the proxy card are being first mailed to shareholders on or about MarchMay 11, 2015.2021.

Shareholders of record at the close of business on February 27, 2015April 28, 2021 (the “Record Date”) are entitled to notice of, and to vote at, the Meeting, even if such shareholders no longer own shares.

If you have any questions about the proposalproposals or about voting, please call D.F. King & Co., Inc., an ASTOne Company,AST Fund Solutions, the Fund’s proxy solicitor, toll-free at 1-877-732-3621.866-406-2283.

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OVERVIEW OF THE PROPOSALS

Introduction

The Trust is currently comprised of sixteennine mutual funds, but only the Fund is the subject of this proxy statement. The Trust is a registered management investment company under the Investment Company Act of 1940, as amended (the “1940 Act”), and is organized as a Massachusetts business trust. The Investment Manager, located at One Stamford Plaza, 263 Tresser Boulevard, Suite 949, Stamford, Connecticut 06901, is a subsidiary of Affiliated Managers Group, Inc. (“AMG”), located at 777 South Flagler Drive, West Palm Beach, Florida 33401. The Investment Manager serves as investment manager and administrator of the Fund and is responsible for the Fund’s overall administration and management. operations.

AMG Distributors, Inc. (the “Distributor”), a wholly owned subsidiary of the Investment Manager, located at 800One Stamford Plaza, 263 Tresser Boulevard, Suite 949, Stamford, Connecticut Avenue, Norwalk, Connecticut 06854,06901, serves as the Fund’s distributor.

The principal executive offices of the Trust are located at 800One Stamford Plaza, 263 Tresser Boulevard, Suite 949, Stamford, Connecticut Avenue, Norwalk, Connecticut 06854.06901.

Proposal 1: Approval of New Subadvisory Agreement

At an in-persona meeting held on February 13, 2015,March 17-18, 2021, and based upon the Board approved the appointmentrecommendation of Gannett Welsh & Kotler, LLC (“GW&K”) as the subadvisor to the Fund on an interim basis to replace Pacific Investment Management Company LLC (“PIMCO”), with GW&K’s services beginning in late February (the “Implementation Date”). The appointment of GW&K was pursuant to an interim subadvisory agreement between the Investment Manager and GW&K (the “Interim Subadvisory Agreement”), to be effective until the earlier of 150 days after February 27, 2015 or the approval of a new subadvisory agreement with GW&K by the Board and Fund shareholders. At the in-person meeting held on February 13, 2015,other factors, the Board, including a majority of the Trustees who are not “interested persons” (as such term is defined in the 1940 Act) of the Trust (the “Independent Trustees”), approved the termination of the subadvisory agreement (the “Existing Subadvisory Agreement”) with First Quadrant, L.P. (“First Quadrant”), the current subadviser of the Fund, and approved the appointment of Veritas Asset Management LLP (“Veritas”) as the subadviser to the Fund on an interim basis to replace First Quadrant, with Veritas’ services beginning on May 21, 2021. The Investment Manager and the Board believed that termination of the Existing Subadvisory Agreement and the proposed new arrangements with Veritas were in the best interests of the Fund and its shareholders. Veritas will initially serve as interim subadviser pursuant to an interim subadvisory agreement between the Investment Manager and Veritas (the “Interim Subadvisory Agreement”), to be effective until the earlier of 150 days after the termination of the Existing Subadvisory Agreement or the approval of the New Subadvisory Agreement (as defined below) by shareholders of the Fund. At the meeting held on March 17-18, 2021, the Board, including a majority of the Independent Trustees, also approved (i) the longer-term appointment of GW&KVeritas as the subadvisorsubadviser to the Fund, (ii) a new subadvisory agreement between the Investment Manager and GW&KVeritas with respect to the Fund (the “New Subadvisory Agreement”) and (iii) the submission of the New Subadvisory Agreement to shareholders of the Fund shareholders for approval. In accordance with Rule 15a-4 under the 1940 Act, shareholders of the Fund are being asked to approve the New Subadvisory Agreement on or before October 18, 2021 in order to ensure that Veritas serves as subadviser to the Fund on an uninterrupted basis following that date (“Proposal 1”). As discussed in greater detail below, the Board has unanimously determined to recommend a vote “FOR” Proposal 1.

The material differences between the Interim Subadvisory Agreement and the former subadvisory agreement between the Investment Manager and PIMCO (the “FormerExisting Subadvisory Agreement”)Agreement with respect to the Fund, as well as the material differences between the New Subadvisory Agreement approved by the Board and the FormerExisting Subadvisory Agreement, are described below.below under “Description of The Interim Subadvisory Agreement” and “Description of the New Subadvisory Agreement”.

If the shareholders of the Fund approve the New Subadvisory Agreement between the Investment Manager and GW&K (the “Proposal”), GW&KVeritas, Veritas will continue to serve as Subadvisorsubadviser to the Fund under the terms of the New Subadvisory Agreement. If shareholders of the Fund do not approve the New Subadvisory Agreement, the New Subadvisory Agreement will not take effect, and the Board will determine what further action is appropriate for the Fund.

In additionconnection with the hiring of Veritas, effective May 21, 2021, the Fund will (i) change its name from AMG FQ Tax-Managed U.S. Equity Fund to AMG Veritas Global Focus Fund, (ii) make changes to its investment objective, principal investment strategies and principal risks and (iii) replace its existing benchmark index with the MSCI World Index. For more information regarding these and other changes to the changes described above, atFund, please see the Board meeting held on February 13, 2015, the Board also approved a proposalsupplement dated March 19, 2021 to change the Fund’s nameprospectus dated February 1, 2021, which is attached as Appendix B to the Proxy Statement.

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Proposal 2: Approval of a Change in the Fund’s Sub-Classification under the 1940 Act from AMG Managers Total Return Bond“Diversified” to “Non-Diversified”

Proposal 2 relates to a proposed change in the Fund’s sub-classification under the 1940 Act from a “diversified” fund to a “non-diversified” fund. As a non-diversified Fund, the Fund would have increased flexibility to AMG GW&K Core Bond Fund, which became effective asinvest a greater percentage of the Implementation Date.

Also atFund’s assets in the securities of fewer issuers, including any one issuer, than it currently does as a diversified fund (“Proposal 2”). If Proposal 2 is approved, non-diversified fund risk would become a principal investment risk of the Fund, as its ability to invest more of its assets in the securities of fewer issuers would increase its vulnerability to factors affecting a single investment. Changing the Fund’s sub-classification from a diversified fund to a non-diversified fund requires shareholder approval. If shareholders approve this change, the Fund’s fundamental investment policy with respect to diversification of investments will be eliminated to reflect that the Fund is non-diversified. As discussed in greater detail below, the Board meeting held on February 13, 2015,has unanimously determined to recommend a vote “FOR” Proposal 2.

If shareholders of the Board approvedFund do not approve Proposal 2, the filingFund will continue to operate as a diversified fund.

Proposal 3: Approval of a registration statement withModified Manager-of-Managers Structure

Proposal 3 relates to a proposed modified “manager-of-managers” structure for the Fund (“Proposal 3”). Under Section 15(a) of the 1940 Act, an investment adviser to a mutual fund generally cannot enter into or materially amend a subadvisory agreement without obtaining shareholder approval, but the Fund is currently operating under a manager-of-managers structure pursuant to an exemptive order (the “AMGF Order”) issued by the Securities and Exchange Commission (the “SEC”) that enables the Investment Manager, subject to establish a new share classthe approval of the Board, but without the need for shareholder approval, to enter into and materially amend subadvisory agreements with unaffiliated subadvisers. The modified “manager-of-managers” structure would also permit the Investment Manager, subject to the approval of the Board, but without the need for shareholder approval, to enter into and materially amend subadvisory agreements with affiliated subadvisers in reliance on the terms of the exemptive order obtained by Carillon Tower Advisers, Inc., et al., Investment Company Release Nos. 33464 (May 2, 2019) (notice) and 33494 (May 29, 2019) (order) (the “Carillon Order”). In addition, the Carillon Order permits funds to disclose fees paid to subadvisers on an aggregate, rather than individual, basis. If shareholders approve Proposal 3, and if the Fund (the “Conversion”), which was filed withwere to have multiple subadvisers, the Fund would not be permitted to disclose fees paid to the subadvisers on an aggregate, rather than individual, basis until after it applied for and received approval from the SEC on February 19, 2015. Underof an amendment to the Conversion, itAMGF Order. Fund shareholder approval is expected thatbeing sought to provide the Fund will,with flexibility to operate under the Carillon Order manager-of-managers structure. As discussed in May or June 2015 (the “Conversion Date”): (i) establish three new classes of shares called Investor Class, Service Class, and Institutional Class, and (ii) convert existinggreater detail below, the Board has unanimously determined to recommend a vote “FOR” Proposal 3.

If shareholders of the Fund approve Proposal 3, the Fund will operate under a manager-of-managers structure pursuant to the Service Class, whichCarillon Order and the Investment Manager will have a minimum initial investment amountflexibility, subject to certain terms and requirements, to enter into and materially amend subadvisory agreements with affiliated and unaffiliated subadvisers without the need for shareholder approval. The Fund would also have flexibility to disclose fees paid to subadvisers on an aggregate, rather than individual, basis, subject to approval by the SEC of $100,000, or allow existingan amendment to the AMGF Order. If shareholders with accounts of a qualifying size to exchange into the Institutional Class, which will have a minimum initial investment amount of $1,000,000. The Conversion will not increase the Fund’s investment management fee paid or increase the annual operating expenses that shareholders currently bear, as Service Class and Institutional Class shares are expected to have lower annual operating expenses than the current shares of the Fund. In addition, thereFund do not approve Proposal 3, the Fund will continue to operate under a manager-of-managers structure pursuant to the AMGF Order and the Fund will continue to be no change inrequired to seek the overall valueapproval of a shareholder’s shares resulting from the Conversion, asits shareholders will receive Serviceto enter into or Institutional Class sharesmaterially amend subadvisory agreements with the same net asset value as the shares currently held. You arenot being asked to approve the Conversion. The Conversion is not subject to shareholder approval and is expected to occur even if the Proposal is not approved by shareholders.affiliated subadvisers.

Voting Procedures

Shareholders of the Fund who own shares at the close of business on the Record Date will be entitled to notice of, and to vote at, the Meeting and any adjournment(s) or postponement(s) thereof. You are entitled to one vote, or fraction thereof, for each share of the Fund, or fraction thereof, that you own on each matter as to which such shares are to be voted at the Meeting. Shares may be voted in person or by proxy. Where shareholders may pursuant to the terms of a notice of a meeting of shareholders (which may be amended from time to time) participate in and vote at such meeting by means of remote communication, shares voted by means of such remote communication shall constitute shares voted in person.

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A quorum must be present at the Meeting for the transaction of business. The holders of 10% of the aggregate number shares of the Fund entitled to vote present in person or by proxy constitute a quorum for the transaction of business.business with respect to the Fund. Abstentions and broker non-votes do not represent votes cast for the Proposala proposal but will be counted for purposes of determining whether a quorum is present. “Broker non-votes” are shares held by a broker or nominee as to which instructions have not been received from the beneficial owners or persons entitled to vote, and the broker or nominee does not have discretionary voting power but for which a broker or nominee returns the proxy card or otherwise votes without actually voting on the Proposal.a proposal. Because the affirmative vote“vote of a majority of the outstanding voting securities,” as defined below, of the Fund as defined below, is required to approve the Proposal,each proposal, abstentions and broker non-votes will have the effect of a vote against a proposal.

At the Proposal.time of the Meeting or any adjournment thereof, the Fund’s custodian may be permitted to vote shares held by certain individual retirement accounts for which it is the trustee and that are not otherwise voted by such account holder. If the Fund’s custodian votes such shares it will vote them in the same proportions as other retirement account shareholders for which it is the trustee and that have submitted voting instructions for their shares. If the Fund’s custodian is authorized to vote the shares and so votes, shareholders should be aware that this practice, known as “echo-voting,” may have the effect of increasing the likelihood that the proposals will be approved.

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Whether or not a quorum is present at the Meeting, the Meeting may, by action of the chair of the Meeting may propose, be adjourned from time to time with respect to one or more adjournments of the Meetingproposals to permit further solicitation of proxies. Any adjourned session or sessions may be held, any time after the date set for the Meeting, without the necessity of further notice. Upon motion of the chair of the Meeting, the question of adjournment may be (but is not required to be) submitted to a vote of the shareholders, and in that case, any adjournment with respect to one or more matters must be approved by the vote of a majority of the votes cast in person or by proxy at the Meeting with respect to the matter or matters adjourned, whether or not a quorum is present with respect to such matter or matters, and, if approved, such adjournment shall take place without the necessity of further notice. Unless a proxy is otherwise limited in this regard, any shares present and entitled to vote at a meeting may, at the discretion of the proxies named therein, be voted “FOR” a proposal in favor of such an adjournment.

Information regarding the number of issued and outstanding shares of the Fund as of the Record Date is provided under “Additional Information” below, representing the same number of votes for the Fund. The persons who are known to have owned beneficially or of record 5% or more of the Fund’s outstanding shares as of February 27, 2015March 31, 2021 are also listed in the “Additional Information” section.

The person(s) named as proxies on the enclosed proxy card will vote in accordance with your directions, if your proxy card is received properly executed or if you vote appropriately by phone or over the Internet. If we receive your proxy card, and it is executed properly, but you give no voting instructions with respect to the Proposal,a proposal, your shares will be voted in accordance with management’s recommendation. The duly appointed proxies may, in their discretion, vote upon such other matters as may properly come before the Meeting and any adjournment(s) or postponement(s) thereof.

Under the Amended and Restated Agreement and Declaration of Trust of the Trust, when any share isa proxy with respect to shares held jointlyin the name of two or more persons shall be valid if executed by several persons, any one of them may vote at any meeting in person or by proxy in respect of such share, unless at or prior to exercise of the proxy the Trust receives a specific written notice to the contrary from any one of them.

In order that your shares may be represented at the Meeting, you are requested to vote your shares by mail, over the Internet or by telephone by following the instructions on your proxy card. IF YOU VOTE BY TELEPHONE OR OVER THE INTERNET, PLEASE DO NOT RETURN YOUR PROXY CARD, UNLESS YOU LATER ELECT TO CHANGE YOUR VOTE. You may revoke your proxy: (a) at any time prior to its exercise by written notice of its revocation to the Secretary of the Trust prior to the Meeting; (b) by the subsequent

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execution and timely return of another proxy prior to the Meeting (following the methods noted above); or (c) by being present and voting in person at the Meeting and giving oral notice of revocation to the chair of the Meeting. However, attendance in-person at the Meeting, by itself, will not revoke a previously-tendered proxy.

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The cost of preparing, printing and mailing the enclosed proxy card and proxy statement and all other costs incurred in connection with the solicitation of proxies, including any additional solicitation made by letter, telephone or facsimile will be paid by the Investment Manager and Veritas. Please see “Additional Information” below for more information regarding solicitation of proxies. If you planwish to vote in person by attendingattend the Meeting, please contactregister by sending an email to attendameeting@astfinancial.com and provide us with your full name and address in order to receive the Fundconference call dial-in information. Please use the email subject line “AMG FQ Tax-Managed U.S. Equity Fund”, and include in writing at AMG Funds I, 800 Connecticut Avenue, Norwalk, Connecticut 06854, or by telephone at 1-800-835-3879your email your full name along with your request for directions.

Information About GW&K

The following is a description of GW&K, based solely on information providedthe conference line number. That number will be sent back to you, allowing you to call into the meeting. We encourage you to vote your shares prior to the Investment Manager by GW&K.

GW&K manages the Fund’s portfolio using its enhanced core bond strategy, which is a multi-sector approach that aims to take advantage of relative value opportunities. GW&K looks for opportunities to generate income and capital appreciation, while also limiting risk, in changing market environments. While under PIMCO’s management of the Fund’s portfolio, the Fund’s investment objective was “to maximize total return consistent with the preservation of capital,” under GW&K’s management, the Fund’s investment objective is “to generate income and capital appreciation while helping to manage risk.” GW&K’s investment approach emphasizes diversification and combines both macroeconomic analysis and comprehensive bottom-up credit research. Although GW&K applies top-down insights as part of its investment process, it generally seeks to keep duration (interest rate) and yield curve exposure similar to the benchmark. GW&K continuously employs risk control measures to monitor duration, credit and sector exposure. Similar to PIMCO’s management of the Fund’s portfolio, under GW&K’s management, the Fund will invest, under normal circumstances, at least 80% of its net assets, plus the amount of any borrowings for investment purposes, in bonds. In contrast to PIMCO’s management of the Fund’s portfolio, however, under GW&K’s management, as part of its principal investment strategy, the Fund will not invest in high yield securities (“junk bonds”), foreign securities, equity-related securities, or derivatives.

GW&K, located at 222 Berkeley Street, 15th Floor, Boston, Massachusetts 02116, is an investment management firm that has advised individual and institutional clients since 1974. As of December 31, 2014, the firm had approximately $25.6 billion in assets under management. In 2008, GW&K became an affiliate of AMG. Under this partnership, AMG, through its wholly-owned subsidiary, AMG Boston Holdings, LLC, indirectly owns a majority interest in GW&K, with the remaining ownership interest held among members of GW&K’sMeeting.

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management team. GW&K’s management team is responsible for the day-to-day management of the firm and maintains full autonomy over the investment process. AMG is a publicly traded, global asset management company (NYSE:AMG) with investments in a diverse group of boutique investment management firms. As of December 31, 2014, AMG had approximately $626 billion in assets under management by its affiliated investment management firms.

Information about the directors and principal executive officers of GW&K is set forth below. The address of each of them is c/o Gannett Welsh & Kotler, LLC, 222 Berkeley Street, 15th Floor, Boston, MA 02116.

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PROPOSAL:PROPOSAL 1: APPROVAL OF THE NEW SUBADVISORY AGREEMENT BETWEEN THE INVESTMENT MANAGER AND GW&KVERITAS WITH RESPECT TO AMG GW&K CORE BOND FUNDFQ TAX-MANAGED U.S. EQUITY FUND.

Board of Trustees Approvals

At an in-persona meeting held on February 13, 2015,March 17-18, 2021, and based upon the recommendation of the Investment Manager and other factors, the Board approved the appointment of GW&KVeritas as the subadvisorsubadviser to the Fund on an interim basis to replace PIMCO,First Quadrant, with GW&K’sVeritas’ services beginning on the Implementation Date,May 21, 2021, and approved the Interim Subadvisory Agreement. As a consequence, on February 27, 2015, PIMCO ceasedMay 21, 2021, First Quadrant will cease serving as subadvisorsubadviser to the Fund, and on February 28, 2015, GW&K beganVeritas will begin serving as the subadvisorsubadviser to the Fund on an interim basis as permitted by Rule 15a-4 under the 1940 Act. At the in-person meeting held on February 13, 2015,March 17-18, 2021, the Board also approved the longer-term appointment of GW&KVeritas as the subadvisorsubadviser to the Fund and approved the New Subadvisory Agreement, subject to shareholder approval. In approving the Interim Subadvisory Agreement and the New Subadvisory Agreement, the Board, including a majority of the Independent Trustees, determined that the hiring of GW&KVeritas is in the best interests of the Fund and its shareholders and does not involve a conflict of interest from which the Investment Manager or an affiliated subadvisorsubadviser derives an inappropriate advantage.

The Board’s determination to approve the appointment of GW&KVeritas as subadvisorsubadviser of the Fund and to approve the Interim Subadvisory Agreement and the New Subadvisory Agreement was based on a variety of factors and considerations, including (i) recommendation by the Investment Manager, which was based on its on-going evaluation of Fund characteristics and exposures and subadvisor performance and investment strategy, (ii) qualitative and quantitative analysis of GW&K’s organizational structure, investment process, style and long-term performance record, and (iii) the Board’s knowledge of GW&K as subadvisor to other funds in the AMG Funds Family of Funds. including:

The recommendation to hire GW&KVeritas was based on the Investment Manager’s belief that GW&KVeritas is a high quality investment advisoradviser with a demonstrated ability to manage taxable fixed incomeglobal equity portfolios and to manage the overall risk of the Fund’s portfolio and would be appropriately suited to manage assets for the Fund and that the proposed changes provide important benefits to Fund shareholders.Fund. Accordingly, the Board, including a majority of the Independent Trustees, unanimously approved (i) the hiring of GW&K andVeritas, (ii) the adoption of the Interim Subadvisory Agreement, effective on May 21, 2021, until the Implementation Date, for a term not to exceedearlier of 150 days after February 27, 2015the termination of the Existing Subadvisory Agreement or the approval of the New Subadvisory Agreement by shareholders of the Fund (as provided by Rule 15a-4), and (iii) subject to shareholder approval, the adoption of the New Subadvisory Agreement. A form of the proposed New Subadvisory Agreement is attached as Appendix A.

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The Interimdisposition of Fund securities in connection with the transition of the Fund’s investment strategies is expected to cause the Fund to realize taxable income for U.S. federal income tax purposes. The Fund intends to make a special distribution to shareholders of all or a portion of such income and any other undistributed income for the current taxable year. The Fund will also bear all registration fees, brokerage commissions, transfer taxes and similar expenses in connection with the purchases and sales of portfolio securities related to the realignment of the Fund’s portfolio.

Information About Veritas

The following is a description of Veritas, based solely on information provided to the Investment Manager by Veritas.

Veritas will manage the Fund’s portfolio using its global equity strategy. Please see Appendix C for more information regarding Veritas’ Global Focus Equity Composite. Under First Quadrant’s management of the Fund’s portfolio, the Fund’s investment objective is “to achieve long-term after-tax returns for investors” and, under Veritas’ management of the Fund’s portfolio, the Fund’s investment objective will be to seek “to provide long-term capital appreciation”. Under First Quadrant’s management of the Fund’s portfolio, the Fund invests, under normal circumstances, at least 80% of its net assets, plus the amount of any borrowings for investment purposes, in equity securities of issuers located in the U.S. Under Veritas’ management of the Fund, the Fund intends to invest in equity securities of a relatively select group of global companies. Additionally, under normal circumstances, the Fund will invest at least 35% (or if conditions are not favorable, in the view of Veritas, at least 25%) of its net assets in investments economically tied to countries other than the U.S., and the Fund will hold investments economically tied to a minimum of three countries other than the U.S.

Veritas is located at 1 Smart’s Place, London WC2B 5LW. As of December 31, 2020, the firm had approximately $33 billion in assets under management. AMG indirectly owns a majority interest in Veritas. AMG is a publicly traded, global asset management company (NYSE:AMG) with investments in a diverse group of boutique investment management firms. As of December 31, 2020, AMG had approximately $716 billion in assets under management by its affiliated investment management firms.

Information about the directors and principal executive officers of Veritas is set forth below. The address of each of them is c/o Veritas Asset Management LLP, 1 Smart’s Place, London WC2B 5LW.

Description of the New Subadvisory Agreement

The terms of the InterimNew Subadvisory Agreement are the same, in all material respects (including with respect to subadvisory fees), asnot materially different from the terms of the FormerExisting Subadvisory Agreement, with certain exceptions. These exceptions are described below under “Comparison with Terms of the Existing Subadvisory Agreement.” The description of the New Subadvisory Agreement as set forth herein is qualified in its entirety by the provisions of the form of the New Subadvisory Agreement in Appendix A.

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Subadvisory Agreement, with certain exceptions described below. Under the terms of the Former Subadvisory Agreement, dated January 15, 2005, as amended, PIMCO received, and under the Interim Subadvisory Agreement, GW&K will receive, a subadvisory fee at an annual rate of 0.25% of the average daily net assets in the Fund account. For the fiscal year ended October 31, 2014, the Investment Manager paid PIMCO $2,960,757 for subadvisory services provided to the Fund. Among the differences between the agreements is that the Interim Subadvisory Agreement adds provisions stating that if the Investment Manager voluntarily waives its fees with respect to the Fund, GW&K will waive a pro rata amount of fees (or such lesser amount as may be requested); if GW&K voluntarily waives its fees with respect to the Fund, the Investment Manager will waive an equal amount of fees (or such lesser amount as may be requested); and if the Investment Manager agrees to pay or reimburse Fund expenses, GW&K will pay or reimburse to the Investment Manager the entire amount of Fund expenses that have been paid or reimbursed by the Investment Manager (or such lesser amount as may be requested). In addition, the Interim Subadvisory Agreement also adds a provision stating that GW&K will be entitled to be compensated to the extent that the Trust pays the Investment Manager any amounts that have been previously waived by the Investment Manager for which GW&K has made payments to the Investment Manager. While the Former Subadvisory Agreement was silent with respect to indemnification, the Interim Subadvisory Agreement provides that the Investment Manager and GW&K will indemnify each other from and against certain damages related to the performance of services by the other party under the Interim Subadvisory Agreement or Management Agreement, as applicable. The Former Subadvisory Agreement provided that the subadvisor was not subject to any liability for any act or omission, error of judgment, or mistake of law or for any loss suffered by the Investment Manager or the Trust in connection with the Former Subadvisory Agreement, except, among other things, by reason of the subadvisor’s gross negligence in the performance of its duties, whereas the Interim Subadvisory Agreement provides that GW&K is not subject to any liability for any act or omission, error of judgment, or mistake of law or for any loss suffered by the Investment Manager or the Trust in connection with the Interim Subadvisory Agreement, except, among other things, by reason of GW&K’s negligence in the performance of its duties. The Former Subadvisory Agreement was governed by Connecticut law, whereas the Interim Subadvisory Agreement is governed by Massachusetts law. In addition, the Former Subadvisory Agreement included certain representations and warranties required by the Commodity Futures Trading Commission (the “CFTC”) because, under PIMCO’s management of the Fund’s portfolio, the Fund was a commodity pool under the Commodity Exchange Act (the “CEA”), and the Investment Manager was registered as a “commodity pool operator” under the CEA with respect to the Fund. The Interim Subadvisory Agreement does not contain such representations and warranties because, under GW&K’s management of the Fund’s portfolio, neither the

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Investment Manager (with respect to the Fund) nor the Fund is subject to regulation as a “commodity pool operator” or “commodity pool,” respectively, under the CEA. Furthermore, the Interim Subadvisory Agreement provides that subadvisory fees due GW&K since the effective date of the Interim Subadvisory Agreement are to be held in an interest-bearing escrow account. If the New Subadvisory Agreement is subsequently approved by shareholders of the Fund, GW&K will continue as subadvisor to the Fund, and the escrowed funds, including interest, will be paid to GW&K. If the New Subadvisory Agreement is not approved, GW&K will be entitled to an amount equal to the lesser of (a) the costs of performing its services during the interim period plus interest or (b) the amount in the escrow account plus interest. Finally, in accordance with Rule 15a-4 under the 1940 Act, Fund shareholders must approve the New Subadvisory Agreement before July 27, 2015 in order for GW&K to serve as subadvisor to the Fund on an uninterrupted basis following that date.

Terms of the New Subadvisory Agreement

Services

Under the New Subadvisory Agreement, if the Proposal 1 is approved by Fund shareholders, GW&KVeritas agrees, subject to the stated investment objective and policies of the Fund as set forth in the Trust’s current registration statement and subject to the supervision of the Investment Manager and the Board, to (i) develop and furnish continuously an investment program and strategy for the Fund in compliance with the Fund’s investment objective and policies as set forth in the Trust’s current registration statement, (ii) provide research and analysis relative to the investment program and investments of the Fund, (iii) determine (subject to the overall supervision of the Board) what investments shall be purchased, held, sold or exchanged by the Fund and what portion, if any, of the assets of the Fund shall be held in cash or cash equivalents, and (iv) make changes on behalf of the Trust in the investments of the Fund. GW&KVeritas will also arrange for the placing of all orders for the purchase and sale of securities and other investments for the Fund’s account and will exercise full discretion and act for the Trust in the same manner and with the same force and effect as the Trust might or could do with respect to such purchases, sales or other transactions, as well as with respect to all other things necessary or incidental to the furtherance or conduct of such purchases, sales or transactions. GW&KVeritas will also make its officers and employees available to meet with the Investment Manager’s officers and directors on reasonabledue notice at reasonable times to review the investments and investment program of the Fund in light of current and prospective economic and market conditions.

Under the New Subadvisory Agreement, GW&KVeritas will exercise voting authority with respect to proxies that the Fund is entitled to vote by virtue of the ownership of assets attributable to that portion of the Fund for which Veritas has investment management responsibility; provided that the exercise of such voting authority isshall be subject to periodic review by the Investment Manager and

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the Trustees and canBoard; provided, further, that such authority may be revoked in whole or in part by the Investment Manager if required by applicable law. GW&KVeritas will exercise its proxy voting authority in accordance with such proxy voting policies and procedures as the Trust may designate from time to time. GW&KVeritas will provide such information relating to its exercise of proxy voting authority hereunder (including the manner in which it has voted proxies and its resolution of conflicts of interest) as reasonably requested by the Investment Manager from time to time. GW&K(These terms governing Veritas’ proxy voting authority are collectively referred to herein as the “New Proxy Voting Provisions.”) Veritas will also have authority to select brokers or dealers to execute purchase and sale transactions for the Fund.Trust. As subadvisorsubadviser to the Fund, GW&KVeritas will be required to provide such periodic and special reports as the Board may reasonably request with respect to matters relating to the duties of the subadvisorVeritas under the New Subadvisory Agreement.

Compensation

In connection withUnder the hiring of GW&K and the New Subadvisory Agreement, at the Board meeting held on February 13, 2015, the Board also approved proposals to (i) reduce the management fee for the Fund from the annual rate of 0.40% to 0.30% of the Fund’s average daily net assets, (ii) reduce the expense cap on the Fund pursuant to a new contractual expense limitation whereby the Investment Manager has agreed to limit the Fund’s total annual operating expenses (exclusive of taxes, interest (including interest incurred in connection with bank and custody overdrafts), shareholder servicing fees, distribution and service (12b-1) fees, brokerage commissions and other transaction costs, acquired fund fees and expenses, and extraordinary expenses) from the annual rate of 0.58% to 0.48% of the Fund’s average daily net assets, and (iii) authorize shares of the Fund (which will be reclassified and redesignated as Service Class shares as of the Conversion Date) to pay up to 0.10% in shareholder servicing fees (such proposals collectively referred to herein as the “New Fee Structure”). The New Fee Structure became effective as of February 28, 2015. As a result of the New Fee Structure, current Fund shareholders will bear lower overall Fund expenses than under the contractual arrangements that were in place prior to February 28, 2015.

Prior to February 28, 2015, under a fundinvestment management agreement between the Trust and the Investment Manager dated August 1, 2000,July 31, 2003, as amended (the “Management Agreement”), the Fund paidpays the Investment Manager a fee at the annual rate of 0.40%0.70% of the Fund’s average daily net assets. For the fiscal year ended October 31, 2020, the Fund paid the Investment Manager $463,651 for advisory services provided to the Fund before any fee waivers or reimbursements. In connection with the hiring of Veritas, the Board has approved a reduction in the Fund’s management fee to an annual rate of 0.67% of the Fund’s average daily net assets, and forwhich will be implemented upon the effectiveness of the New Subadvisory Agreement.

The following is a comparison of the management fees paid by the Fund to the Investment Manager during the fiscal year ended October 31, 2014,2020 with the management fees that would have been paid if the new management fee rate to be paid by the Fund (0.67%) had been in effect:

Under the terms of the Existing Subadvisory Agreement, dated July 31, 2003, as amended, First Quadrant receives a subadvisory fee paid by the Investment Manager $4,737,211at an annual rate of 0.60% of the average daily net assets of the Fund managed by the subadviser. For the fiscal year ended October 31, 2020, the Investment Manager paid First Quadrant $397,415 for advisorysubadvisory services provided to the Fund. Effective asUnder the terms of February 28, 2015,the New Subadvisory Agreement, Veritas is proposed to receive a subadvisory fee paid by the Investment Manager has contractually agreedat an annual rate of 0.49%.

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The following is a comparison of the subadvisory fees paid by the Investment Manager to reduceFirst Quadrant during the fiscal year ended October 31, 2020 with the subadvisory fees that would have been paid if the proposed subadvisory fee rate to be paid to Veritas had been in effect:

The hiring of Veritas and the approval of the New Subadvisory Agreement will not increase the management fee forrate paid by Fund shareholders. In connection with the Fund fromhiring of Veritas, the Board has approved a 0.03% reduction in the Fund’s management fee to an annual rate of 0.40% to 0.30%0.67% of the Fund’s average daily net assets. Theassets, which will be implemented upon the effectiveness of the New Subadvisory Agreement provides that the Investment Manager will pay GW&K a fee at the annual rate of 0.25% of the Fund’s average daily net assets.Agreement. The fees paid to GW&KVeritas under the New Subadvisory Agreement are not paid by the Fund

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but are paid by the Investment Manager out of the management fees the Investment Manager receives from the Fund. The hiring of GW&K and the approvalShareholders will not experience an increase in expenses as a result of the New Subadvisory Agreementchange in subadvisory fee paid to Veritas and it will not result in an increase in the total expense ratio for the Fund.

Current and Pro Forma Examples of the Fund’s Total Annual Operating Expenses

Mutual funds pay ongoing fees for investment management and other services. These changes are known as the total annual fund operating expenses.

The tables below show examples of the Fund’s total annual operating expenses under the current fee borne bystructure and pro forma total annual operating expenses under the proposed fee structure. The tables below describe the fees and expenses that you may pay if you buy, hold and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.

Annual Fund shareholders; rather,Operating Expenses (expenses that you pay each year as discussed above,a percentage of the value of your investment)

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(1) The Investment Manager has contractually agreed, through at least March 1, 2022, to waive management fees and/or pay or reimburse the Fund’s expenses in order to limit Total Annual Fund Operating Expenses After Fee Waiver and Expense Reimbursements (exclusive of taxes, interest (including interest incurred in connection with the hiring of GW&Kbank and the approval of the New Subadvisory Agreement, the management fee borne by Fund shareholders is being reduced.

Comparisoncustody overdrafts and in connection with terms of the Former Subadvisory Agreement

The terms of the New Subadvisory Agreement are not materially different from the terms of the Former Subadvisory Agreement, with certain exceptions described below. Among the differences between the agreements is that the New Subadvisory Agreement adds provisions stating that if the Investment Manager voluntarily waives itssecurities sold short), shareholder servicing fees, distribution and service (12b-1) fees, brokerage commissions and other transaction costs, dividends payable with respect to securities sold short, acquired fund fees and expenses, and extraordinary expenses) of the Fund GW&K will waive a pro rata amountto the annual rate of fees (or0.89% of the Fund’s average daily net assets (for purposes of this paragraph, this annual rate or such lesser amount asother annual rate that may be requested); if GW&K voluntarily waives its fees with respectin effect from time to time, the “Expense Cap”), subject to later reimbursement by the Fund in certain circumstances. In general, for a period of up to 36 months after the Investment Manager will waive an equal amount of fees (or such lesser amount as may be requested); and if the Investment Manager agrees to pay or reimburse Fund expenses, GW&K will pay or reimburse to the Investment Manager the entire amount of Fund expenses that have beendate any amounts are paid, waived or reimbursed by the Investment Manager, (orthe Investment Manager may recover such lesser amount asamounts from the Fund, provided that such repayment would not cause the Fund’s Total Annual Fund Operating Expenses After Fee Waiver and Expense Reimbursements (exclusive of the items noted in the parenthetical above) to exceed either (i) the Expense Cap in effect at the time such amounts were paid, waived or reimbursed, or (ii) the Expense Cap in effect at the time of such repayment by the Fund. The contractual expense limitation may only be terminated in the event the Investment Manager or a successor ceases to be the investment manager of the Fund or a successor fund, by mutual agreement between the Investment Manager and the AMG Funds I Board of Trustees or in the event of the Fund’s liquidation unless the Fund is reorganized or is a party to a merger in which the surviving entity is successor to the accounting and performance information of the Fund.

(2) The Investment Manager has contractually agreed, through at least March 1, 2023, to waive management fees and/or pay or reimburse the Fund’s expenses in order to limit Total Annual Fund Operating Expenses After Fee Waiver and Expense Reimbursements (exclusive of taxes, interest (including interest incurred in connection with bank and custody overdrafts and in connection with securities sold short), shareholder servicing fees, distribution and service (12b-1) fees, brokerage commissions and other transaction costs, dividends payable with respect to securities sold short, acquired fund fees and expenses, and extraordinary expenses) of the Fund to the annual rate of 0.88% of the Fund’s average daily net assets (for purposes of this paragraph, this annual rate or such other annual rate that may be requested).in effect from time to time, the “Expense Cap”), subject to later reimbursement by the Fund in certain circumstances. In addition,general, for a period of up to 36 months after the date any amounts are paid, waived or reimbursed by the Investment Manager, the Investment Manager may recover such amounts from the Fund,

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provided that such repayment would not cause the Fund’s Total Annual Fund Operating Expenses After Fee Waiver and Expense Reimbursements (exclusive of the items noted in the parenthetical above) to exceed either (i) the Expense Cap in effect at the time such amounts were paid, waived or reimbursed, or (ii) the Expense Cap in effect at the time of such repayment by the Fund. The contractual expense limitation may only be terminated in the event the Investment Manager or a successor ceases to be the investment manager of the Fund or a successor fund, by mutual agreement between the Investment Manager and the AMG Funds I Board of Trustees or in the event of the Fund’s liquidation unless the Fund is reorganized or is a party to a merger in which the surviving entity is successor to the accounting and performance information of the Fund.

Example

This Example will help you compare the cost of investing in the Fund to the cost of investing in other mutual funds. The Example makes certain assumptions. It assumes that you invest $10,000 as an initial investment in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. It also assumes that your investment has a 5% total return each year and the Fund’s operating expenses remain the same. The Example includes the Fund’s contractual expense limitation for the first year of each period.¹ Although your actual costs may be higher or lower, based on the above assumptions, your costs would be:

(1) The Fund’s current expense limitation agreement expires on March 1, 2022. If the Fund’s new expense structure has not yet taken effect on March 1, 2022, the Fund’s current expense limitation agreement will be extended.

Comparison with Terms of the Existing Subadvisory Agreement

Among the differences between the Existing Subadvisory Agreement and the New Subadvisory Agreement also adds a provision stating that GW&K will be entitled to be compensated toare the extent that the Trust pays the Investment Manager any amounts that have been previously waived by the Investment Manager for which GW&K has made payments to the Investment Manager. While the Former Subadvisory Agreement was silent with respect to indemnification, the New Subadvisory Agreement provides that the Investment Manager and GW&K will indemnify each other from and against certain damages related to the performance of services by the other party under the New Subadvisory Agreement or Management Agreement, as applicable. The Former Subadvisory Agreement also provided that the subadvisor was not subject to any liability for any act or omission, error of judgment, or mistake of law or for any loss suffered by the Investment Manager or the Trust in connection with the Former Subadvisory Agreement, except, among other things, by reason of the subadvisor’s gross negligence in the performance of its duties, whereas the New Subadvisory Agreement provides that GW&K is not subject to any liability for any act or omission, error of judgment, or mistake of law or for any loss suffered by the Investment Manager or the Trust in connection with the New Subadvisory Agreement, except, among other things, by reason of GW&K’s negligence in the performance of its duties. The Former Subadvisory Agreement was governed by Connecticut law, whereas the New Subadvisory Agreement is governed by Massachusetts law. In addition, the Former Subadvisory Agreement included certain representations and warranties required by the CFTC because, under PIMCO’s management of the Fund’s portfolio, the Fund was a commodity pool under the CEA, and the Investment Manager was registered as a “commodity poolfollowing:

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operator” under the CEA with respect to the Fund. The New Subadvisory Agreement does not contain such representations and warranties because, under GW&K’s management of the Fund’s portfolio, neither the Investment Manager (with respect to the Fund) nor the Fund is subject to regulation as a “commodity pool operator” or “commodity pool,” respectively, under the CEA.

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The Board, including a majority of the Independent Trustees, last approved the continuation of the FormerExisting Subadvisory Agreement at an in-persona meeting held on June 19-20, 2014.25, 2020. The FormerExisting Subadvisory Agreement was last submitted to a vote of shareholders in connection with First Quadrant’s appointment as subadviser to the Fund on January 11, 2005,July 31, 2003.

In accordance with Rule 15a-4 under the 1940 Act, Fund shareholders are being asked to approve the New Subadvisory Agreement on or before October 18, 2021 in order to ensure that Veritas serves as subadviser to the Fund on an uninterrupted basis following that date.

Description of the Interim Subadvisory Agreement

The terms of the Interim Subadvisory Agreement are not materially different from the terms of the Existing Subadvisory Agreement, with certain exceptions. The differences between the terms of the Interim Subadvisory Agreement and those of the Existing Subadvisory Agreement are identical to the differences between the New Subadvisory Agreement and the Existing Subadvisory Agreement, as described in “Description of the New Subadvisory Agreement” above, except that (i) under the Interim Subadvisory Agreement, Veritas will receive a subadvisory fee paid by the Investment Manager of 0.51% of the average daily net assets of the Fund managed by Veritas, and (ii) unlike the New Subadvisory Agreement, the Interim Subadvisory Agreement will continue in effect until the earlier of 150 days after the termination of the Existing Subadvisory Agreement or the date upon which the New Subadvisory Agreement is approved by a majority of the outstanding voting securities of the Fund (as defined in the 1940 Act).

The following is a comparison of the subadvisory fees paid by the Investment Manager to First Quadrant during the fiscal year ended October 31, 2020 with the subadvisory fees that would have been paid if the subadvisory fee rate to be paid to Veritas under the Interim Subadvisory Agreement had been in effect:

The hiring of Veritas and the approval of the Interim Subadvisory Agreement will not increase the management fee rate paid by Fund shareholders. The fees paid to Veritas under the Interim Subadvisory

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Agreement are not paid by the Fund but are paid by the Investment Manager out of the management fees the Investment Manager receives from the Fund. Shareholders are not expected to experience an increase in expenses as a result of the change in subadvisory fee paid to Veritas and it is not expected to result in an increase in the total expense ratio for the purpose of organizing the Fund.

Portfolio Managers

If shareholders approve the New Subadvisory Agreement, it is expected that GW&K’s currentVeritas’ portfolio management team that has managedwill manage the Fund under the Interim Subadvisory Agreement since February 28, 2015beginning on May 21, 2021 will continue to manage the Fund’s assets.

GW&K managesVeritas will manage the Fund using its enhanced core bondglobal equity strategy. Mary F. Kane, C.F.A. isAndy Headley and Mike Moore will be the portfolio managermanagers jointly and primarily responsible for the day-to-day management of the Fund’s portfolio. Ms. KaneFund, beginning on May 21, 2021.

Andrew Headley. Mr. Headley is a partner and portfolio managerHead of GW&K, and has served in those positions since 2011 and 2005, respectively. Ms. Kane joined GW&K in 2005 and has over 20 yearsGlobal, Co-Fund Manager of industry experience. Ms. Kanethe Veritas global strategies and a teamManaging Partner of sevenVeritas. He has 25 years’ investment experience. Prior to joining Veritas in 2003, he was an Analyst and Portfolio Manager at WP Stewart from 2001 to 2003 and at Newton Investment Management from 1996 to 2001. Mr. Headley also worked as a Tax Consultant at Price Waterhouse from 1993 to 1996.

Mike Moore. Mr. Moore is Alternate Fund Manager for Veritas’ Global strategy (with the exception of the Veritas Global Equity Income Fund) and Analyst specializing in Technology, who joined Veritas in 2014. Previously, he was a Global Analyst at M&G Investments from 2005 to 2014 and held a prior role at Barclays Wealth Management.

Information Regarding Similar Funds

Veritas does not currently act as investment adviser or subadviser with respect to any other investment professionals are dedicatedcompany registered under the 1940 Act with similar investment objectives and strategies to GW&K’s taxable bond strategies.those of the Fund.

Board of Trustees Recommendation

At an in-persona meeting held via telephone and videoconference on February 13, 2015,March 17-18, 2021,¹ the Board, and separately a majority of the Independent Trustees, unanimously voted to approve the termination of the Existing Subadvisory Agreement with First Quadrant, the Interim Subadvisory Agreement between the Investment Manager and GW&K,Veritas with respect to the Fund, the New Subadvisory Agreement between the Investment Manager and GW&KVeritas with respect to the Fund (together with the Interim Subadvisory Agreement, the “Agreements”), and the presentation of the New Subadvisory Agreement for shareholder approval at a special meeting to be held for such purpose.purpose, including a recommendation that shareholders vote to approve the New Subadvisory Agreement. The Independent Trustees were separately represented by independent legal counsel in their consideration of the Agreements.

In considering the Agreements, the Trustees considered the information relating to the Fund and GW&KVeritas provided to them including performance information forin connection with the Fund and the Barclays Aggregate Index (the “Fund Benchmark”) and, with respect to GW&K, comparative performance information for the composite investment portfolio managed by GW&K in its core bond strategy (the “Core Bond Strategy”). In considering the Agreements, the Trustees also considered the information provided to them regarding the nature, extent and quality of services provided by GW&K to the four other funds that GW&K sub-

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advises in the AMG Funds Family of Funds, which, as of February 13, 2015, consisted of 46 funds (the “AMG Funds Complex”), and to be provided by GW&K under the Agreements. The Board also considered that the Investment Manager contractually agreed to reduce its advisory fee and expense limitation for the Fund effective as of the date of the Interim Subadvisory Agreement.meeting on March 17-18, 2021. Prior to voting, the Independent Trustees: (a) reviewed the foregoing information with their independent legal counsel and with management;information; (b) received materials from their independent legal counsel discussing the

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legal standards applicable to their consideration of the Agreements; and (c) met with their independent legal counsel in a private session at which no representatives of management were present.

Nature, extent and quality of servicesservices.. In considering the nature, extent and quality of the services to be provided by GW&K,Veritas, the Trustees reviewed information relating to GW&K’sVeritas’ financial condition, operations and personnel and the investment philosophy, strategies and techniques (the “Investment Strategy”) that are intended to be used by GW&KVeritas in managing the Fund. The Trustees noted that the Fund’s investment objective would be to seek to provide long-term capital appreciation. The Trustees also noted that the Fund would intend to invest in equity securities of a relatively select group of global companies and, under normal circumstances, the Fund would invest at least 35% (or if conditions are not favorable, in the view of Veritas, 25%) of its net assets in investments economically tied to countries other than the U.S., and the Fund would hold investments economically tied to a minimum of three countries other than the U.S. The Trustees further noted that in connection with hiring Veritas, shareholders would be asked to approve a change in the Fund’s status from operating as a diversified fund to operating as a non-diversified fund. Among other things, the Trustees reviewed biographical information on portfolio management and other professional staff, information regarding GW&K’sVeritas’ organizational and management structure, and GW&K’s brokerageVeritas’ compliance policies and practices.procedures. The Trustees noted that Veritas was founded in 2003 and has 42 employees. The Trustees considered specific information provided regarding the experience of the individuals at GW&KVeritas that are expected to have portfolio management responsibility for the Fund, including the information set forth in the Fund’s prospectus to be filed with the Securities and Exchange Commission.Fund. The Trustees noted that a partner at GW&K with over 20 years of industry experienceone proposed portfolio manager joined Veritas in 2003 and a team of seventhe other investment professionals dedicated to GW&K’s taxable bond strategies are expected to manage the Fund’s portfolio. In addition, the Trustees observed that GW&K proposes to manage the Fund’sproposed portfolio using its Core Bond Strategy, which is a multi-sector approach that aims to take advantage of relative value opportunities.manager joined Veritas in 2014. In the course of their deliberations, the Trustees evaluated, among other things: (a) the expected services to be rendered by GW&KVeritas to the Fund; (b) the qualifications and experience of GW&K’sVeritas’ personnel; and (c) GW&K’sVeritas’ compliance program. The Trustees alsoadditionally considered GW&K’sVeritas’ risk management processes. The Trustees reviewed Veritas’ compliance policies and procedures, code of ethics, and specific information related to how Veritas monitors, among other things, portfolio compliance and proxy voting and deemed all of them to be adequate. The Trustees also took into account the financial condition of GW&KVeritas with respect to its ability to provide the services required under the Agreements and noted that, as of February 5, 2015, GW&KDecember 31, 2020, Veritas managed approximately $3$33 billion in assets across their taxable fixed income business.

Performance.assets. The Trustees considered information relatingconcluded that, given Veritas’ financial condition, it would be able to meet any reasonably foreseeable obligations under the Fund’s and GW&K’s performance. Among other information relatingAgreements.

Performance. Because Veritas was proposing to GW&K’s performance,manage the Fund with its global equity investment strategy, the Trustees considered the performance of GW&K with respect to its Core Bond Strategy, notingnoted that for the one-year, three-year, five-year and ten-year periods ended December 31, 2014, the annualized gross performance of the Core Bond Strategy was abovethey could not draw any conclusions regarding the performance of the Fund Benchmark andto date. The Trustees, however, considered the annualized net performance ofprovided by Veritas with respect to Veritas’ Global Focus Equity Composite, which is managed in a substantially similar manner to the Core Bond Strategy was below, above, above

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and above, respectively,Fund. In this regard, the Trustees noted that the performance of the Fund Benchmark.Global Focus Equity Composite had not been adjusted for the fees and expenses of the Fund. The Trustees concluded that thisreviewed the year over year performance record supported the approval of the Agreements.Global Focus Equity Composite from 2011 through 2019 and noted that the composite outperformed its benchmark in six of the nine calendar years.

Subadvisory Fees, Profitability and Economies of ScaleScale. . The Trustees noted that the Investment Manager, and not the Fund, is responsible for paying the fees charged by GW&K.Veritas. In considering the anticipated profitability of GW&KVeritas with respect to the provision of subadvisory services to the Fund, the Trustees considered information regarding GW&K’sVeritas’ organization, management and financial stability. The Trustees noted that, because GW&KVeritas is an affiliate of the Investment Manager, sucha portion of Veritas’ revenues or anticipated profitabilityprofits might be shared directly or indirectly shared bywith the Investment Manager. The Trustees also noted that the subadvisory fee rate to be paid to GW&KVeritas under each Agreement was the same aslower than the rate paid to PIMCOFirst Quadrant under the FormerExisting Subadvisory Agreement. The Trustees further noted that the Investment Manager proposed certain fee changes for the Fund, all of which would be implemented upon the effectiveness of the New Subadvisory Agreement and would result in the overall reduction of the Fund’s net expense ratios as compared with the Fund’s current fee structure. The Trustees also considered the percentage amount of the advisory fee retained by the Investment Manager after payment of the subadvisory fee with respect to the Fund, which would increase if the New Subadvisory Agreement was approved. The Trustees also noted payments made or to be made from Veritas to the Investment Manager, and other payments made or to be made from the Investment Manager to Veritas, including certain expense sharing arrangements related to, among other things, shareholder servicing and distribution. The Trustees concluded that these arrangements were reasonable. The Trustees noted that the management fees (which include both the advisory and administration fees) and total expenses (net of applicable expense waivers/reimbursements) of Class I shares (the class of shares which is the primary focus of the Fund’s distribution) of the Fund would both be lower than the average for an appropriate peer group of similar mutual funds for the Fund once the new fee changes went into effect.

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The Board took into account management’s discussion of the proposed subadvisory fee structure, and the services GW&KVeritas is expected to provide in performing its functions under the Agreements. The Trustees also were provided in their June 19-20, 2014 in-person meeting, with the estimated profitability of GW&KVeritas with respect to its proposed subadvisory services to the other funds it sub-advises in the AMG Funds Complex.Fund. Based on the foregoing, the Trustees concluded that the profitability to GW&KVeritas is expected to be reasonable.reasonable and that Veritas is not expected to realize material benefits from economies of scale that would warrant adjustments to the subadvisory fees at this time. Also with respect to economies of scale, the Trustees noted that as the Fund’s assets increase over time, the Fund may realize economies of scale with respect to certain fees and expenses, other than the Fund’s management fee, to the extent the increase in assets is proportionally greater than the increase in such fees and expenses.

In addition, the Trustees considered other potential benefits of the subadvisory relationship to GW&K,Veritas, including, among others, the potential broadening of Veritas’ global equity investment capabilities, as well as the indirect benefits that GW&KVeritas may receive from GW&K’sVeritas’ relationship with the Fund, including any so-called “fallout benefits” to GW&K,Veritas, such as reputational value derived from GW&KVeritas serving as subadvisorsubadviser to the Fund, which bears GW&K’sVeritas’ name. With respect to economies of scale, given that GW&K is being hired as a new subadvisor for this Fund, the Trustees did not consider potential economies of scale in the management of the Fund by GW&K to be a material factor in their deliberations at this time. In addition, with respect to fee comparisons, the Trustees noted that the fee rates to be charged by GW&K are the same as those charged by PIMCO under the Former Subadvisory Agreement with respect to the Fund. Taking into account all of the foregoing, the Trustees concluded that, in light of the nature, extent and quality of the services to be provided by GW&K,Veritas, and the other considerations noted above with respect to GW&K,Veritas, the Fund’s subadvisory fees are reasonable.

* * * *

After consideration of the foregoing, the Trustees reached the following conclusions (in addition to the conclusions discussed above) regarding each Agreement: (a) GW&KVeritas has demonstrated that it possesses the capability and resources to perform the duties required of it under each Agreement; (b) GW&K’sVeritas’ Investment Strategy is appropriate for pursuing the Fund’s investment objectives;objective; (c) GW&KVeritas is reasonably likely to execute its investment strategy consistently over time; and (d) GW&KVeritas maintains appropriate compliance programs.

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Based on all of the above-mentioned factors and their related conclusions, with no single factor or conclusion being determinative and with each Trustee not necessarily attributing the same weight to each factor, the Trustees concluded that approval of each Agreement would be in the best interests of the Fund and its shareholders. Accordingly, on February 13, 2015,March 17-18, 2021, the Trustees, and separately a majority of the Independent Trustees, unanimously voted to approve each Agreement.

Required Vote

The Proposal 1 must be approved by a “vote of a majority of the outstanding voting securities” of the Fund. The “vote of a majority of the outstanding voting securities” is defined in the 1940 Act as the lesser of the vote of (i) 67% or more of the voting securities of the Fund entitled to vote on the Proposal 1 present at the Meeting or represented by proxy, if more than 50% of the Fund’s outstanding voting securities are present or represented by proxy; or (ii) more than 50% of the outstanding voting securities of the Fund entitled to vote on the Proposal. Proposal 1.

If the vote required to approve the Proposal 1 is not obtained from the Fund, the New Subadvisory Agreement between the Investment Manager and GW&KVeritas will not be approved, and the Trustees will consider what other actions to take in the best interests of the Fund.

THE TRUSTEES UNANIMOUSLY RECOMMEND THAT SHAREHOLDERS OF THE FUND VOTE “FOR” THE PROPOSAL.PROPOSAL 1.

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PROPOSAL 2: APPROVAL OF A CHANGE IN THE FUND’S SUB-CLASSIFICATION UNDER THE 1940 ACT FROM “DIVERSIFIED” TO “NON-DIVERSIFIED”.

At a meeting held on March 17-18, 2021, the Trustees approved a change in the Fund’s sub-classification under the 1940 Act from “diversified” to “non-diversified,” and the submission of such change to Fund shareholders for approval. As a non-diversified fund, the Fund would have increased flexibility to invest a greater percentage of the Fund’s assets in the securities of fewer issuers, including any one issuer, than it currently does as a diversified fund. Section 5(b) of the 1940 Act requires mutual funds to be classified as either diversified or non-diversified, and a fund may not change its classification as a diversified fund to a non-diversified fund without shareholder approval. The Fund is currently sub-classified as a diversified fund under the 1940 Act. As a diversified fund, the Fund is generally limited as to the size of its investment in any single issuer. The 1940 Act sets forth the requirements that must be met for an investment company to be diversified. The 1940 Act requires that to qualify as a “diversified” fund, a fund may not, with respect to at least 75% of the value of its total assets, invest in securities of any issuer if, immediately after the investment, more than 5% of the total assets of the fund (taken at current value) would be invested in the securities of that issuer or the fund would hold more than 10% of the outstanding voting securities of the issuer. (Under the 1940 Act, these percentage limitations do not apply to cash or cash items (including receivables), securities issued by investment companies, or any “Government security.” A Government security is any security issued or guaranteed as to principal or interest by the United States, or by a person controlled or supervised by and acting as an instrumentality of the government of the United States pursuant to authority granted by the Congress of the United States, or any certificate of deposit for any of the foregoing.) The remaining 25% of the fund’s total assets is not subject to this restriction. This means that, with respect to the remaining 25% of the fund’s total assets, a diversified fund may invest more than 5% of its total assets in the securities of one issuer and may hold more than 10% of an issuer’s outstanding voting securities. These 1940 Act requirements do not apply to an investment company that is non-diversified.

Risks of Non-Diversification. As a non-diversified fund, the Fund will be permitted to invest a greater percentage of its assets in a single issuer or a group of issuers, and, as a result, may be subject to greater credit, market, and other risks than a diversified fund. The poor performance by a single issuer may have a greater impact on the performance of a non-diversified fund. A non-diversified fund’s shares tend to be more volatile than shares of a diversified fund and are more susceptible to the risks of focusing investments in a small number of issuers or industries, and the risks of a single economic, political or regulatory occurrence. Accordingly, the Fund’s operation as a non-diversified fund will involve more investment risk than a more diversified investment style.

Fund management believes that the ability to operate as a non-diversified Fund and invest a greater percentage of the Fund’s assets in fewer issuers or any one issuer is consistent with, and will help the Fund to pursue, its investment objective of long-term capital appreciation.

As a diversified fund, the Fund currently has a fundamental policy that it may purchase securities of any issuer only when consistent with the maintenance of its status as a diversified company under the Investment Company Act of 1940, or the rules or regulations thereunder, as such statute, rules or regulations may be amended from time to time, or under regulatory guidance or interpretations of such Act, rules or regulations. If Proposal 2 is approved, this fundamental policy will be eliminated and the Fund’s sub-classification under the 1940 Act will change from diversified to non-diversified.

If Proposal 2 is approved, the Fund will continue to be subject to diversification requirements under Subchapter M of the Internal Revenue Code of 1986, as amended (the “Internal Revenue Code”), that apply to regulated investment companies. To qualify, among other requirements, the Fund must limit its investment so that, at the close of each quarter of the taxable year, (1) not more than 25% of the Fund’s total assets will be invested in the securities of a single issuer, and (2) with respect to 50% of its total assets, not more than 5% of its total assets will be invested in the securities of a single issuer and the Fund will not own more than 10% of the outstanding voting securities of a single issuer.

Required Vote

Proposal 2 must be approved by a “vote of a majority of the outstanding voting securities” of the Fund. The “vote of a majority of the outstanding voting securities” is defined in the 1940 Act as the lesser of the vote of (i)

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67% or more of the voting securities of the Fund entitled to vote on Proposal 2 present at the Meeting or represented by proxy, if more than 50% of the Fund’s outstanding voting securities are present or represented by proxy; or (ii) more than 50% of the outstanding voting securities of the Fund entitled to vote on Proposal 2.

If the vote required to approve Proposal 2 is not obtained from the Fund, the Fund will continue to operate as a diversified fund.

THE TRUSTEES UNANIMOUSLY RECOMMEND THAT SHAREHOLDERS OF THE FUND VOTE

“FOR” PROPOSAL 2.

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PROPOSAL 3: APPROVAL OF A MODIFIED MANAGER-OF-MANAGERS STRUCTURE FOR THE FUND THAT WOULD PERMIT THE INVESTMENT MANAGER TO ENTER INTO AND MATERIALLY AMEND SUBADVISORY AGREEMENTS WITH UNAFFILIATED AND AFFILIATED SUBADVISERS WITHOUT OBTAINING SHAREHOLDER APPROVAL AND WOULD ALSO PERMIT THE FUND TO DISCLOSE FEES PAID TO SUBADVISERS ON AN AGGREGATE, RATHER THAN INDIVIDUAL, BASIS.

Under Section 15(a) of the 1940 Act, an investment adviser to a mutual fund generally cannot enter into or materially amend a subadvisory agreement without obtaining shareholder approval. The Fund currently operates in a manager-of-managers structure pursuant to the AMGF Order previously obtained by the Investment Manager and the Trust. The AMGF Order allows the Board to enter into or materially amend subadvisory agreements without a shareholder vote if the subadviser is not affiliated with the Investment Manager; if the subadviser is an affiliate, a shareholder vote is required. The Fund and the Investment Manager would like to rely on recent SEC relief that would modify the Fund’s existing manager-of-managers relief and permit the Investment Manager to enter into or materially amend a subadvisory agreement with an “affiliated person” (as such term is defined in Section 2(a)(3) of the 1940 Act) of the Investment Manager or the Fund (in addition to unaffiliated persons under the current relief) without first obtaining shareholder approval, provided that the shareholders of the Fund had previously authorized the Investment Manager to do so and the Investment Manager complies with certain conditions. In the absence of reliance on the recent SEC relief, in order to enter into or materially amend a subadvisory agreement with an affiliate, the Fund must obtain shareholder approval by undertaking the costly and time consuming effort to conduct a shareholder meeting, including preparing and distributing proxy materials and soliciting votes from shareholders. The Board believes that it is in the best interests of shareholders if the Board represents their interests in approving or rejecting recommendations made by the Investment Manager regarding subadvisers. This approach will avoid the costs and delays associated with holding shareholder meetings to obtain approval for future changes. Accordingly, the Board and the Investment Manager are asking shareholders to grant authority to the Investment Manager and the Trust to enter into and materially amend investment subadvisory agreements with subadvisers that are affiliated persons of the Investment Manager or the Fund, with the approval of the Board, but without obtaining additional shareholder approval.

Exemptive Relief

On May 29, 2019, the SEC issued the Carillon Order to Carillon Tower Advisers, Inc., et al. that allows (i) the Carillon Series Trust and its investment adviser, without the approval of fund shareholders, to enter into or amend a subadvisory agreement with a subadviser (“Subadviser Voting Relief”), including any subadviser that is an affiliated person of the investment adviser or a fund (an “Affiliated Subadviser”), and (ii) the series of Carillon Series Trust to disclose the advisory fees paid to subadvisers on an aggregate, rather than individual, basis. The Carillon Order is the first exemptive order issued by the SEC extending multi-manager exemptive relief to Affiliated Subadvisers and contains several conditions, some of which are already included in the AMGF Order.

On July 9, 2019, the staff of the SEC’s Division of Investment Management issued a no-action letter to the BNY Mellon family of funds and BNY Mellon Investment Adviser, Inc. (the “BNYM No-Action Letter”) stating that the staff would not recommend enforcement action if a fund complex and adviser that previously obtained a “manager of managers” exemptive order extends that order to cover Affiliated Subadvisers without seeking an amended exemptive order from the SEC. The staff’s no-action position is conditioned on compliance with the conditions set forth in the Carillon Order. The BNYM No-Action Letter and the Carillon Order are referred to herein as the “Relief.”

Under the Relief, the Investment Manager and the Trust are subject to several conditions imposed by the SEC to ensure that the interests of the Fund’s shareholders are adequately protected. Among these conditions are that, within ninety (90) days of the hiring of a new subadviser, shareholders of the Fund will be furnished with an information statement that contains substantially the same information about the subadviser and the subadvisory agreement that the Fund would otherwise have been required to send to shareholders in a proxy statement. The prospectus for the Fund will disclose the existence, substance and effect of reliance on the Relief and that the Investment Manager has the ultimate responsibility, subject to oversight by the Board, to oversee the Fund’s subadvisers and recommend their hiring, termination, and replacement. Also, as noted above, shareholders must approve the Investment Manager’s and the Fund’s authority to enter into and materially amend these investment

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subadvisory agreements. In addition, the Carillon Order permits funds to disclose fees paid to subadvisers on an aggregate, rather than individual, basis. If shareholders approve Proposal 3, and if the Fund were to have multiple subadvisers, the Fund would not be permitted to disclose fees paid to the subadvisers on an aggregate, rather than individual, basis until after it applied for and received approval from the SEC of an amendment to the AMGF Order.

Board of Trustees Recommendations

The Trustees believe that approval of the modified “manager-of-managers” structure is in the best interest of the Fund and its shareholders in order to afford the Investment Manager the flexibility to provide investment advisory services to the Fund through one or more subadvisers, including Affiliated Subadvisers, that have particular expertise in the type of investments in which the Fund invests.

As described above, without the ability to utilize the Relief, in order for the Investment Manager and the Board to appoint a new Affiliated Subadviser for the Fund or materially modify a subadvisory agreement with an Affiliated Subadviser, the Board must call and hold a shareholder meeting of the Fund, create and distribute proxy materials and solicit votes from the Fund’s shareholders. This process is time consuming and costly. Without the delay inherent in holding shareholder meetings, the Investment Manager would be able to act more quickly to appoint a new subadviser that is an affiliate if and when the Board and the Investment Manager believe that the appointment would benefit the Fund. The Trustees also took into account that if the Investment Manager and the Board appoint an Affiliated Subadviser, the Fund’s shareholders would receive an information statement containing substantially the same information about the Affiliated Subadviser and the subadvisory agreement that the Fund would otherwise have been required to send shareholders in a proxy statement. The Investment Manager and the Board will continue to be subject to their fiduciary duty to act in the best interest of the Fund and its shareholders. The Trustees believe that granting the Investment Manager and the Board maximum flexibility to select Affiliated Subadvisers, in addition to the flexibility they currently have to select unaffiliated subadvisers, without incurring the delay or expense of obtaining further shareholder approval, is in the best interest of shareholders because it will allow the Fund to operate more efficiently and cost-effectively.

Finally, the Trustees believe that they will retain sufficient oversight of the Fund’s investment subadvisory arrangements to seek to ensure that shareholders’ interests are protected whenever the Investment Manager selects an Affiliated Subadviser or materially modifies an investment subadvisory agreement with an Affiliated Subadviser, in the same manner as the Trustees currently exercise oversight of the Fund’s investment subadvisory agreements and seek to ensure that shareholders’ interests are protected whenever the Investment Manager selects unaffiliated subadvisers. The Board, including a majority of the Independent Trustees, will continue to evaluate and to approve all proposed investment subadvisory agreements, as well as any proposed modifications to existing subadvisory agreements. In doing so, the Trustees will analyze such factors as they consider to be relevant to the approval of or proposed modifications to an investment subadvisory agreement. As with the Fund’s investment advisory agreement, the terms of each investment subadvisory agreement will include those required by applicable provisions of the 1940 Act.

Subadviser Oversight

The Investment Manager serves as investment manager to the Fund under the Management Agreement. The Management Agreement provides that the Investment Manager is specifically responsible for the following services:

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In performing the functions set forth above and supervising the Fund’s subadviser, the Investment Manager:

The Investment Manager will retain these responsibilities if Proposal 3 is approved.

Required Vote

Proposal 3 must be approved by a “vote of a majority of the outstanding voting securities” of the Fund. The “vote of a majority of the outstanding voting securities” is defined in the 1940 Act as the lesser of the vote of (i) 67% or more of the voting securities of the Fund entitled to vote on Proposal 3 present at the Meeting or represented by proxy, if more than 50% of the Fund’s outstanding voting securities are present or represented by proxy; or (ii) more than 50% of the outstanding voting securities of the Fund entitled to vote on Proposal 3.

If the vote required to approve Proposal 3 is not obtained from the Fund, the Fund will continue to operate under a manager-of-managers structure pursuant to the AMGF Order and the Fund will continue to be required to seek the approval of its shareholders to enter into or materially amend subadvisory agreements with Affiliated Subadvisers.

THE TRUSTEES UNANIMOUSLY RECOMMEND THAT SHAREHOLDERS OF THE FUND VOTE “FOR” PROPOSAL 3.

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OTHER BUSINESS

The Trustees do not know of any additional matters to be presented at the Meeting other than those set forth in this Proxy Statement. If other business should properly come before the Meeting, proxies will be voted in accordance with the judgment of the persons named in the accompanying proxy or any adjournment(s) or postponement(s) thereof.

ADDITIONAL INFORMATIONInformation Regarding Similar Funds

Other Information

Proxy materials, reportsVeritas does not currently act as investment adviser or subadviser with respect to any other investment company registered under the 1940 Act with similar investment objectives and other information filed by the Fund can be inspected and copied at the Public Reference Facilities maintained by the SEC at 100 F Street, NE, Washington, DC 20549. The SEC maintains an Internet web site (at http://www.sec.gov), which contains other information aboutstrategies to those of the Fund.

Voting InformationBoard of Trustees Recommendation

Proxy Solicitation

RepresentativesAt a meeting held via telephone and videoconference on March 17-18, 2021,¹ the Board, and separately a majority of the Independent Trustees, unanimously voted to approve the termination of the Existing Subadvisory Agreement with First Quadrant, the Interim Subadvisory Agreement between the Investment Manager may solicit proxies by telephone, letter or personally and will receive no additional compensation for these services. The Trust may also use one or more proxy solicitation firmsVeritas with respect to assistthe Fund, the New Subadvisory Agreement between the Investment Manager and Veritas with respect to the Fund (together with the mailingInterim Subadvisory Agreement, the “Agreements”), and tabulation effort and any special personal solicitation of proxies. Banks, brokers, fiduciaries and nominees will, upon request, be reimbursed for their reasonable expenses in sending proxy material to beneficial owners of sharesthe presentation of the Fund.New Subadvisory Agreement for shareholder approval at a special meeting to be held for such purpose, including a recommendation that shareholders vote to approve the New Subadvisory Agreement. The costIndependent Trustees were separately represented by independent legal counsel in their consideration of preparing, printingthe Agreements.

In considering the Agreements, the Trustees considered the information relating to the Fund and mailing the enclosed proxy card and proxy statement and all other costs incurredVeritas provided to them in connection with the solicitation of proxies, including any additional solicitation made by letter, telephone or facsimile will be paid bymeeting on March 17-18, 2021. Prior to voting, the Investment Manager and GW&K.Independent Trustees: (a) reviewed the foregoing information; (b) received materials from their independent legal counsel discussing the

D.F. King & Co., Inc., an ASTOne Company (the “Solicitor”) has been engaged to assist in the solicitation of proxies, at an estimated cost of approximately $250,000, plus expenses. As the Meeting date approaches, certain shareholders of the Fund may receive a telephone call from a representative of the Solicitor if their votes have not yet been received. Proxies that are obtained telephonically will be recorded in accordance with the procedures described below. The Trustees believe that these procedures are reasonably designed to ensure that both the identity of the shareholder casting the vote and the voting instructions of the shareholder are accurately determined.

In all cases where a telephonic proxy is solicited, the Solicitor’s representative is required to ask for each shareholder’s full name and address, or the zip code or employer identification number, and to confirm

1

The Trustees determined that the conditions surrounding the COVID-19 virus constituted unforeseen or emergency circumstances and that reliance on the SEC’s exemptive order, which provides relief from the in-person voting requirements of the 1940 Act in certain circumstances (the “In-Person Relief”), was necessary or appropriate due to the circumstances related to current or potential effects of COVID-19. The Trustees unanimously wished to rely on the In-Person Relief with respect to the approval of those matters on the agenda for the March 17-18, 2021 meeting that would otherwise require in-person votes under the 1940 Act. See Investment Company Release No. 33897 (June 19, 2020). This exemptive order supersedes, in part, a similar, earlier exemptive order issued by the SEC (Investment Company Release No. 33824 (March 25, 2020)).

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shareholder has receivedlegal standards applicable to their consideration of the proxy materialsAgreements; and (c) met with their independent legal counsel in a private session at which no representatives of management were present.

Nature, extent and quality of services. In considering the nature, extent and quality of the services to be provided by Veritas, the Trustees reviewed information relating to Veritas’ financial condition, operations and personnel and the investment philosophy, strategies and techniques (the “Investment Strategy”) that are intended to be used by Veritas in managing the Fund. The Trustees noted that the Fund’s investment objective would be to seek to provide long-term capital appreciation. The Trustees also noted that the Fund would intend to invest in equity securities of a relatively select group of global companies and, under normal circumstances, the Fund would invest at least 35% (or if conditions are not favorable, in the mail. Ifview of Veritas, 25%) of its net assets in investments economically tied to countries other than the shareholder isU.S., and the Fund would hold investments economically tied to a corporation orminimum of three countries other entity,than the Solicitor’s representative is requiredU.S. The Trustees further noted that in connection with hiring Veritas, shareholders would be asked to askapprove a change in the Fund’s status from operating as a diversified fund to operating as a non-diversified fund. Among other things, the Trustees reviewed information on portfolio management and other professional staff, information regarding Veritas’ organizational and management structure, and Veritas’ compliance policies and procedures. The Trustees noted that Veritas was founded in 2003 and has 42 employees. The Trustees considered specific information provided regarding the experience of the individuals at Veritas that are expected to have portfolio management responsibility for the person’s titleFund. The Trustees noted that one proposed portfolio manager joined Veritas in 2003 and confirmationthe other proposed portfolio manager joined Veritas in 2014. In the course of their deliberations, the Trustees evaluated, among other things: (a) the expected services to be rendered by Veritas to the Fund; (b) the qualifications and experience of Veritas’ personnel; and (c) Veritas’ compliance program. The Trustees additionally considered Veritas’ risk management processes. The Trustees reviewed Veritas’ compliance policies and procedures, code of ethics, and specific information related to how Veritas monitors, among other things, portfolio compliance and proxy voting and deemed all of them to be adequate. The Trustees also took into account the financial condition of Veritas with respect to its ability to provide the services required under the Agreements and noted that, as of December 31, 2020, Veritas managed approximately $33 billion in assets. The Trustees concluded that, given Veritas’ financial condition, it would be able to meet any reasonably foreseeable obligations under the Agreements.

Performance. Because Veritas was proposing to manage the Fund with its global equity investment strategy, the Trustees noted that they could not draw any conclusions regarding the performance of the Fund to date. The Trustees, however, considered the performance provided by Veritas with respect to Veritas’ Global Focus Equity Composite, which is managed in a substantially similar manner to the Fund. In this regard, the Trustees noted that the person is authorized to direct the votingperformance of the shares. IfGlobal Focus Equity Composite had not been adjusted for the fees and expenses of the Fund. The Trustees reviewed the year over year performance of the Global Focus Equity Composite from 2011 through 2019 and noted that the composite outperformed its benchmark in six of the nine calendar years.

Subadvisory Fees, Profitability and Economies of Scale. The Trustees noted that the Investment Manager, and not the Fund, is responsible for paying the fees charged by Veritas. In considering the anticipated profitability of Veritas with respect to the provision of subadvisory services to the Fund, the Trustees considered information solicited agreesregarding Veritas’ organization, management and financial stability. The Trustees noted that, because Veritas is an affiliate of the Investment Manager, a portion of Veritas’ revenues or anticipated profits might be shared directly or indirectly with the information providedInvestment Manager. The Trustees also noted that the subadvisory fee rate to be paid to Veritas under each Agreement was lower than the rate paid to First Quadrant under the Existing Subadvisory Agreement. The Trustees further noted that the Investment Manager proposed certain fee changes for the Fund, all of which would be implemented upon the effectiveness of the New Subadvisory Agreement and would result in the overall reduction of the Fund’s net expense ratios as compared with the Fund’s current fee structure. The Trustees also considered the percentage amount of the advisory fee retained by the Investment Manager after payment of the subadvisory fee with respect to the Solicitor, thenFund, which would increase if the Solicitor’s representative hasNew Subadvisory Agreement was approved. The Trustees also noted payments made or to be made from Veritas to the responsibilityInvestment Manager, and other payments made or to explainbe made from the process, readInvestment Manager to Veritas, including certain expense sharing arrangements related to, among other things, shareholder servicing and distribution. The Trustees concluded that these arrangements were reasonable. The Trustees noted that the Proposal listed onmanagement fees (which include both the proxy cardadvisory and askadministration fees) and total expenses (net of applicable expense waivers/reimbursements) of Class I shares (the class of shares which is the primary focus of the Fund’s distribution) of the Fund would both be lower than the average for an appropriate peer group of similar mutual funds for the shareholder’s instructions onFund once the Proposal. Although the Solicitor’s representative is permitted to answer questions about the process, he or she is not permitted to recommend to the shareholder how to vote, other than to read any recommendation set forth in this Proxy Statement. The Solicitor will record the shareholder’s instructions on the card. Within 72 hours, the shareholder will be sent a letter or mailgram to confirm his or her vote and asking the shareholder to call the Solicitor immediately if his or her instructions are not correctly reflected in the confirmation.

If a shareholder wishes to participate in the Meeting and does not wish to authorize the execution of a proxy by telephone, mail, facsimile or Internet, the shareholder may vote at the Meeting in person.

If you require additional information regarding the proxy or replacement proxy cards, please call the Solicitor toll free at 1-877-732-3621. Any proxy given by a shareholder, whether in writing, by telephone, by facsimile or the Internet, is revocable until voted at the Meeting.

Shareholders Sharing the Same Address

The Fund will mail only one copy of this proxy statement to a household, even if more than one person in a household is a Fund shareholder of record, unless the Fund has received contrary instructions from one or more of the shareholders. If you need additional copies of this proxy statement and you are a holder of record of your shares, please call the Fund at 1-800-835-3879. If your shares are held in broker street name, please contact your financial service firm to obtain additional copies of this proxy statement. If in the future you do not want the mailing of proxy statements to be combined with those of other members of your household, or if you have received multiple copies of this proxy statement and want future mailings to be combined with those of other members of your household, please contact the Fund in writing at AMG Funds I, 800 Connecticut Avenue, Norwalk, Connecticut 06854, or by telephone at 1-800-835-3879, or contact your financial service firm. The Fund undertakes to deliver promptly upon written or oral request a separate copy of the proxy statement to a security holder at a shared address to which a single copy of the document was delivered.new fee changes went into effect.

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Principal HoldersThe Board took into account management’s discussion of the proposed subadvisory fee structure, and Management Ownershipthe services Veritas is expected to provide in performing its functions under the Agreements. The Trustees also were provided with the estimated profitability of Veritas with respect to its proposed subadvisory services to the Fund. Based on the foregoing, the Trustees concluded that the profitability to Veritas is expected to be reasonable and that Veritas is not expected to realize material benefits from economies of scale that would warrant adjustments to the subadvisory fees at this time. Also with respect to economies of scale, the Trustees noted that as the Fund’s assets increase over time, the Fund may realize economies of scale with respect to certain fees and expenses, other than the Fund’s management fee, to the extent the increase in assets is proportionally greater than the increase in such fees and expenses.

The total numberIn addition, the Trustees considered other potential benefits of sharesthe subadvisory relationship to Veritas, including, among others, the potential broadening of Veritas’ global equity investment capabilities, as well as the indirect benefits that Veritas may receive from Veritas’ relationship with the Fund, including any so-called “fallout benefits” to Veritas, such as reputational value derived from Veritas serving as subadviser to the Fund, which bears Veritas’ name. Taking into account all of the foregoing, the Trustees concluded that, in light of the nature, extent and quality of the services to be provided by Veritas, and the other considerations noted above with respect to Veritas, the Fund’s subadvisory fees are reasonable.

* * * *

After consideration of the foregoing, the Trustees reached the following conclusions (in addition to the conclusions discussed above) regarding each Agreement: (a) Veritas has demonstrated that it possesses the capability and resources to perform the duties required of it under each Agreement; (b) Veritas’ Investment Strategy is appropriate for pursuing the Fund’s investment objective; (c) Veritas is reasonably likely to execute its investment strategy consistently over time; and (d) Veritas maintains appropriate compliance programs.

Based on all of the above-mentioned factors and their related conclusions, with no single factor or conclusion being determinative and with each Trustee not necessarily attributing the same weight to each factor, the Trustees concluded that approval of each Agreement would be in the best interests of the Fund outstanding, asand its shareholders. Accordingly, on March 17-18, 2021, the Trustees, and separately a majority of the Record Date, and information concerningIndependent Trustees, unanimously voted to approve each Agreement.

Required Vote

Proposal 1 must be approved by a “vote of a majority of the shareholders who owned beneficially oroutstanding voting securities” of record 5%the Fund. The “vote of a majority of the outstanding voting securities” is defined in the 1940 Act as the lesser of the vote of (i) 67% or more of the voting securities of the Fund entitled to vote on Proposal 1 present at the Meeting or represented by proxy, if more than 50% of the Fund’s outstanding voting securities as of February 4, 2015, is set forth below.

AMG GW&K Core Bond Fund

The Trust did not know of any personare present or entity who, as of February 4, 2015, “controlled” (within the meaning of the 1940 Act) the Fund. A party holding in excess of 25%represented by proxy; or (ii) more than 50% of the outstanding voting securities of the Fund entitled to vote on Proposal 1.

If the vote required to approve Proposal 1 is presumednot obtained from the Fund, the New Subadvisory Agreement between the Investment Manager and Veritas will not be approved, and the Trustees will consider what other actions to take in the best interests of the Fund.

THE TRUSTEES UNANIMOUSLY RECOMMEND THAT SHAREHOLDERS OF THE FUND VOTE “FOR” PROPOSAL 1.

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PROPOSAL 2: APPROVAL OF A CHANGE IN THE FUND’S SUB-CLASSIFICATION UNDER THE 1940 ACT FROM “DIVERSIFIED” TO “NON-DIVERSIFIED”.

At a meeting held on March 17-18, 2021, the Trustees approved a change in the Fund’s sub-classification under the 1940 Act from “diversified” to “non-diversified,” and the submission of such change to Fund shareholders for approval. As a non-diversified fund, the Fund would have increased flexibility to invest a greater percentage of the Fund’s assets in the securities of fewer issuers, including any one issuer, than it currently does as a diversified fund. Section 5(b) of the 1940 Act requires mutual funds to be classified as either diversified or non-diversified, and a “controlfund may not change its classification as a diversified fund to a non-diversified fund without shareholder approval. The Fund is currently sub-classified as a diversified fund under the 1940 Act. As a diversified fund, the Fund is generally limited as to the size of its investment in any single issuer. The 1940 Act sets forth the requirements that must be met for an investment company to be diversified. The 1940 Act requires that to qualify as a “diversified” fund, a fund may not, with respect to at least 75% of the value of its total assets, invest in securities of any issuer if, immediately after the investment, more than 5% of the total assets of the fund (taken at current value) would be invested in the securities of that issuer or the fund would hold more than 10% of the outstanding voting securities of the issuer. (Under the 1940 Act, these percentage limitations do not apply to cash or cash items (including receivables), securities issued by investment companies, or any “Government security.” A Government security is any security issued or guaranteed as to principal or interest by the United States, or by a person controlled or supervised by and acting as an instrumentality of the government of the United States pursuant to authority granted by the Congress of the United States, or any certificate of deposit for any of the foregoing.) The remaining 25% of the fund’s total assets is not subject to this restriction. This means that, with respect to the remaining 25% of the fund’s total assets, a diversified fund may invest more than 5% of its total assets in the securities of one issuer and may hold more than 10% of an issuer’s outstanding voting securities. These 1940 Act requirements do not apply to an investment company that is non-diversified.

Risks of Non-Diversification. As a non-diversified fund, the Fund will be permitted to invest a greater percentage of its assets in a single issuer or a group of issuers, and, as a result, may be subject to greater credit, market, and other risks than a diversified fund. The poor performance by a single issuer may have a greater impact on the performance of a non-diversified fund. A non-diversified fund’s shares tend to be more volatile than shares of a diversified fund and are more susceptible to the risks of focusing investments in a small number of issuers or industries, and the risks of a single economic, political or regulatory occurrence. Accordingly, the Fund’s operation as a non-diversified fund will involve more investment risk than a more diversified investment style.

Fund management believes that the ability to operate as a non-diversified Fund and invest a greater percentage of the Fund’s assets in fewer issuers or any one issuer is consistent with, and will help the Fund to pursue, its investment objective of long-term capital appreciation.

As a diversified fund, the Fund currently has a fundamental policy that it may purchase securities of any issuer only when consistent with the maintenance of its status as a diversified company under the Investment Company Act of 1940, or the rules or regulations thereunder, as such statute, rules or regulations may be amended from time to time, or under regulatory guidance or interpretations of such Act, rules or regulations. If Proposal 2 is approved, this fundamental policy will be eliminated and the Fund’s sub-classification under the 1940 Act will change from diversified to non-diversified.

If Proposal 2 is approved, the Fund will continue to be subject to diversification requirements under Subchapter M of the Internal Revenue Code of 1986, as amended (the “Internal Revenue Code”), that apply to regulated investment companies. To qualify, among other requirements, the Fund must limit its investment so that, at the close of each quarter of the taxable year, (1) not more than 25% of the Fund’s total assets will be invested in the securities of a single issuer, and (2) with respect to 50% of its total assets, not more than 5% of its total assets will be invested in the securities of a single issuer and the Fund will not own more than 10% of the outstanding voting securities of a single issuer.

Required Vote

Proposal 2 must be approved by a “vote of a majority of the outstanding voting securities” of the Fund. The “vote of a majority of the outstanding voting securities” is defined in the 1940 Act as the lesser of the vote of (i)

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67% or more of the voting securities of the Fund entitled to vote on Proposal 2 present at the Meeting or represented by proxy, if more than 50% of the Fund’s outstanding voting securities are present or represented by proxy; or (ii) more than 50% of the outstanding voting securities of the Fund entitled to vote on Proposal 2.

If the vote required to approve Proposal 2 is not obtained from the Fund, the Fund will continue to operate as a diversified fund.

THE TRUSTEES UNANIMOUSLY RECOMMEND THAT SHAREHOLDERS OF THE FUND VOTE

“FOR” PROPOSAL 2.

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PROPOSAL 3: APPROVAL OF A MODIFIED MANAGER-OF-MANAGERS STRUCTURE FOR THE FUND THAT WOULD PERMIT THE INVESTMENT MANAGER TO ENTER INTO AND MATERIALLY AMEND SUBADVISORY AGREEMENTS WITH UNAFFILIATED AND AFFILIATED SUBADVISERS WITHOUT OBTAINING SHAREHOLDER APPROVAL AND WOULD ALSO PERMIT THE FUND TO DISCLOSE FEES PAID TO SUBADVISERS ON AN AGGREGATE, RATHER THAN INDIVIDUAL, BASIS.

Under Section 15(a) of the 1940 Act, an investment adviser to a mutual fund generally cannot enter into or materially amend a subadvisory agreement without obtaining shareholder approval. The Fund currently operates in a manager-of-managers structure pursuant to the AMGF Order previously obtained by the Investment Manager and the Trust. The AMGF Order allows the Board to enter into or materially amend subadvisory agreements without a shareholder vote if the subadviser is not affiliated with the Investment Manager; if the subadviser is an affiliate, a shareholder vote is required. The Fund and the Investment Manager would like to rely on recent SEC relief that would modify the Fund’s existing manager-of-managers relief and permit the Investment Manager to enter into or materially amend a subadvisory agreement with an “affiliated person” (as such term is defined in Section 2(a)(3) of the 1940 Act) of the Investment Manager or the Fund based(in addition to unaffiliated persons under the current relief) without first obtaining shareholder approval, provided that the shareholders of the Fund had previously authorized the Investment Manager to do so and the Investment Manager complies with certain conditions. In the absence of reliance on the substantial ownership interest heldrecent SEC relief, in order to enter into or materially amend a subadvisory agreement with an affiliate, the Fund must obtain shareholder approval by undertaking the costly and time consuming effort to conduct a shareholder meeting, including preparing and distributing proxy materials and soliciting votes from shareholders. The Board believes that it is in the best interests of shareholders if the Board represents their interests in approving or rejecting recommendations made by the Investment Manager regarding subadvisers. This approach will avoid the costs and delays associated with holding shareholder meetings to obtain approval for future changes. Accordingly, the Board and the party’s resultantInvestment Manager are asking shareholders to grant authority to the Investment Manager and the Trust to enter into and materially amend investment subadvisory agreements with subadvisers that are affiliated persons of the Investment Manager or the Fund, with the approval of the Board, but without obtaining additional shareholder approval.

Exemptive Relief

On May 29, 2019, the SEC issued the Carillon Order to Carillon Tower Advisers, Inc., et al. that allows (i) the Carillon Series Trust and its investment adviser, without the approval of fund shareholders, to enter into or amend a subadvisory agreement with a subadviser (“Subadviser Voting Relief”), including any subadviser that is an affiliated person of the investment adviser or a fund (an “Affiliated Subadviser”), and (ii) the series of Carillon Series Trust to disclose the advisory fees paid to subadvisers on an aggregate, rather than individual, basis. The Carillon Order is the first exemptive order issued by the SEC extending multi-manager exemptive relief to Affiliated Subadvisers and contains several conditions, some of which are already included in the AMGF Order.

On July 9, 2019, the staff of the SEC’s Division of Investment Management issued a no-action letter to the BNY Mellon family of funds and BNY Mellon Investment Adviser, Inc. (the “BNYM No-Action Letter”) stating that the staff would not recommend enforcement action if a fund complex and adviser that previously obtained a “manager of managers” exemptive order extends that order to cover Affiliated Subadvisers without seeking an amended exemptive order from the SEC. The staff’s no-action position is conditioned on compliance with the conditions set forth in the Carillon Order. The BNYM No-Action Letter and the Carillon Order are referred to herein as the “Relief.”

Under the Relief, the Investment Manager and the Trust are subject to several conditions imposed by the SEC to ensure that the interests of the Fund’s shareholders are adequately protected. Among these conditions are that, within ninety (90) days of the hiring of a new subadviser, shareholders of the Fund will be furnished with an information statement that contains substantially the same information about the subadviser and the subadvisory agreement that the Fund would otherwise have been required to send to shareholders in a proxy statement. The prospectus for the Fund will disclose the existence, substance and effect of reliance on the Relief and that the Investment Manager has the ultimate responsibility, subject to oversight by the Board, to oversee the Fund’s subadvisers and recommend their hiring, termination, and replacement. Also, as noted above, shareholders must approve the Investment Manager’s and the Fund’s authority to enter into and materially amend these investment

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subadvisory agreements. In addition, the Carillon Order permits funds to disclose fees paid to subadvisers on an aggregate, rather than individual, basis. If shareholders approve Proposal 3, and if the Fund were to have multiple subadvisers, the Fund would not be permitted to disclose fees paid to the subadvisers on an aggregate, rather than individual, basis until after it applied for and received approval from the SEC of an amendment to the AMGF Order.

Board of Trustees Recommendations

The Trustees believe that approval of the modified “manager-of-managers” structure is in the best interest of the Fund and its shareholders in order to afford the Investment Manager the flexibility to provide investment advisory services to the Fund through one or more subadvisers, including Affiliated Subadvisers, that have particular expertise in the type of investments in which the Fund invests.

As described above, without the ability to influence voting on certain matters submittedutilize the Relief, in order for the Investment Manager and the Board to appoint a new Affiliated Subadviser for the Fund or materially modify a subadvisory agreement with an Affiliated Subadviser, the Board must call and hold a shareholder consideration.

Asmeeting of the Record Date,Fund, create and distribute proxy materials and solicit votes from the total numberFund’s shareholders. This process is time consuming and costly. Without the delay inherent in holding shareholder meetings, the Investment Manager would be able to act more quickly to appoint a new subadviser that is an affiliate if and when the Board and the Investment Manager believe that the appointment would benefit the Fund. The Trustees also took into account that if the Investment Manager and the Board appoint an Affiliated Subadviser, the Fund’s shareholders would receive an information statement containing substantially the same information about the Affiliated Subadviser and the subadvisory agreement that the Fund would otherwise have been required to send shareholders in a proxy statement. The Investment Manager and the Board will continue to be subject to their fiduciary duty to act in the best interest of the Fund and its shareholders. The Trustees believe that granting the Investment Manager and the Board maximum flexibility to select Affiliated Subadvisers, in addition to the flexibility they currently have to select unaffiliated subadvisers, without incurring the delay or expense of obtaining further shareholder approval, is in the best interest of shareholders because it will allow the Fund to operate more efficiently and cost-effectively.

Finally, the Trustees believe that they will retain sufficient oversight of the Fund’s investment subadvisory arrangements to seek to ensure that shareholders’ interests are protected whenever the Investment Manager selects an Affiliated Subadviser or materially modifies an investment subadvisory agreement with an Affiliated Subadviser, in the same manner as the Trustees currently exercise oversight of the Fund’s investment subadvisory agreements and seek to ensure that shareholders’ interests are protected whenever the Investment Manager selects unaffiliated subadvisers. The Board, including a majority of the Independent Trustees, will continue to evaluate and to approve all proposed investment subadvisory agreements, as well as any proposed modifications to existing subadvisory agreements. In doing so, the Trustees will analyze such factors as they consider to be relevant to the approval of or proposed modifications to an investment subadvisory agreement. As with the Fund’s investment advisory agreement, the terms of each investment subadvisory agreement will include those required by applicable provisions of the 1940 Act.

Subadviser Oversight

The Investment Manager serves as investment manager to the Fund under the Management Agreement. The Management Agreement provides that the Investment Manager is specifically responsible for the following services:

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In performing the functions set forth above and supervising the Fund’s subadviser, the Investment Manager:

The Investment Manager will retain these responsibilities if Proposal 3 is approved.

Required Vote

Proposal 3 must be approved by a “vote of a majority of the outstanding voting securities” of the Fund. The “vote of a majority of the outstanding voting securities” is defined in the 1940 Act as the lesser of the vote of (i) 67% or more of the voting securities of the Fund entitled to vote on Proposal 3 present at the Meeting or represented by proxy, if more than 50% of the Fund’s outstanding shares was 70,232,007.60.

As of February 4, 2015, the following personsvoting securities are present or entities owned of record 5%represented by proxy; or (ii) more than 50% of the Fund’s outstanding securities:

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As of February 4, 2015, all management personnel (i.e., Trustees and Officers of the Trust) as a group owned beneficially less than 1% of the Fund’s outstanding shares.

Since the beginning of the most recently completed fiscal year, no Trustee has purchased or soldvoting securities of the Investment Manager, GW&KFund entitled to vote on Proposal 3.

If the vote required to approve Proposal 3 is not obtained from the Fund, the Fund will continue to operate under a manager-of-managers structure pursuant to the AMGF Order and the Fund will continue to be required to seek the approval of its shareholders to enter into or materially amend subadvisory agreements with Affiliated Subadvisers.

THE TRUSTEES UNANIMOUSLY RECOMMEND THAT SHAREHOLDERS OF THE FUND VOTE “FOR” PROPOSAL 3.

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OTHER BUSINESS

The Trustees do not know of any additional matters to be presented at the Meeting other than those set forth in this Proxy Statement. If other business should properly come before the Meeting, proxies will be voted in accordance with the judgment of the persons named in the accompanying proxy or any of their respective parents and subsidiaries exceeding 1% of the outstanding securities of any class of securities issued by the Investment Manager, GW&Kadjournment(s) or any of their respective parents or subsidiaries.postponement(s) thereof.

Certain Trustees and Officers may from time to time own securities of AMG, including securities received as compensation for services to AMG or its affiliates.

Information Regarding Similar Funds

Veritas does not currently act as investment adviser or subadviser with respect to any other investment company registered under the 1940 Act with similar investment objectives and strategies to those of the Fund.

Board of Trustees Recommendation

At a meeting held via telephone and videoconference on March 17-18, 2021,¹ the Board, and separately a majority of the Independent Trustees, unanimously voted to approve the termination of the Existing Subadvisory Agreement with First Quadrant, the Interim Subadvisory Agreement between the Investment Manager and Veritas with respect to the Fund, the New Subadvisory Agreement between the Investment Manager and Veritas with respect to the Fund (together with the Interim Subadvisory Agreement, the “Agreements”), and the presentation of the New Subadvisory Agreement for shareholder approval at a special meeting to be held for such purpose, including a recommendation that shareholders vote to approve the New Subadvisory Agreement. The Independent Trustees were separately represented by independent legal counsel in their consideration of the Agreements.

In considering the Agreements, the Trustees considered the information relating to the Fund and Veritas provided to them in connection with the meeting on March 17-18, 2021. Prior to voting, the Independent Trustees: (a) reviewed the foregoing information; (b) received materials from their independent legal counsel discussing the

16

legal standards applicable to their consideration of the Agreements; and (c) met with their independent legal counsel in a private session at which no representatives of management were present.

Nature, extent and quality of services. In considering the nature, extent and quality of the services to be provided by Veritas, the Trustees reviewed information relating to Veritas’ financial condition, operations and personnel and the investment philosophy, strategies and techniques (the “Investment Strategy”) that are intended to be used by Veritas in managing the Fund. The Trustees noted that the Fund’s investment objective would be to seek to provide long-term capital appreciation. The Trustees also noted that the Fund would intend to invest in equity securities of a relatively select group of global companies and, under normal circumstances, the Fund would invest at least 35% (or if conditions are not favorable, in the view of Veritas, 25%) of its net assets in investments economically tied to countries other than the U.S., and the Fund would hold investments economically tied to a minimum of three countries other than the U.S. The Trustees further noted that in connection with hiring Veritas, shareholders would be asked to approve a change in the Fund’s status from operating as a diversified fund to operating as a non-diversified fund. Among other things, the Trustees reviewed information on portfolio management and other professional staff, information regarding Veritas’ organizational and management structure, and Veritas’ compliance policies and procedures. The Trustees noted that Veritas was founded in 2003 and has 42 employees. The Trustees considered specific information provided regarding the experience of the individuals at Veritas that are expected to have portfolio management responsibility for the Fund. The Trustees noted that one proposed portfolio manager joined Veritas in 2003 and the other proposed portfolio manager joined Veritas in 2014. In the course of their deliberations, the Trustees evaluated, among other things: (a) the expected services to be rendered by Veritas to the Fund; (b) the qualifications and experience of Veritas’ personnel; and (c) Veritas’ compliance program. The Trustees additionally considered Veritas’ risk management processes. The Trustees reviewed Veritas’ compliance policies and procedures, code of ethics, and specific information related to how Veritas monitors, among other things, portfolio compliance and proxy voting and deemed all of them to be adequate. The Trustees also took into account the financial condition of Veritas with respect to its ability to provide the services required under the Agreements and noted that, as of December 31, 2020, Veritas managed approximately $33 billion in assets. The Trustees concluded that, given Veritas’ financial condition, it would be able to meet any reasonably foreseeable obligations under the Agreements.

Performance. Because Veritas was proposing to manage the Fund with its global equity investment strategy, the Trustees noted that they could not draw any conclusions regarding the performance of the Fund to date. The Trustees, however, considered the performance provided by Veritas with respect to Veritas’ Global Focus Equity Composite, which is managed in a substantially similar manner to the Fund. In this regard, the Trustees noted that the performance of the Global Focus Equity Composite had not been adjusted for the fees and expenses of the Fund. The Trustees reviewed the year over year performance of the Global Focus Equity Composite from 2011 through 2019 and noted that the composite outperformed its benchmark in six of the nine calendar years.

Subadvisory Fees, Profitability and Economies of Scale. The Trustees noted that the Investment Manager, and not the Fund, is responsible for paying the fees charged by Veritas. In considering the anticipated profitability of Veritas with respect to the provision of subadvisory services to the Fund, the Trustees considered information regarding Veritas’ organization, management and financial stability. The Trustees noted that, because Veritas is an affiliate of the Investment Manager, a portion of Veritas’ revenues or anticipated profits might be shared directly or indirectly with the Investment Manager. The Trustees also noted that the subadvisory fee rate to be paid to Veritas under each Agreement was lower than the rate paid to First Quadrant under the Existing Subadvisory Agreement. The Trustees further noted that the Investment Manager proposed certain fee changes for the Fund, all of which would be implemented upon the effectiveness of the New Subadvisory Agreement and would result in the overall reduction of the Fund’s net expense ratios as compared with the Fund’s current fee structure. The Trustees also considered the percentage amount of the advisory fee retained by the Investment Manager after payment of the subadvisory fee with respect to the Fund, which would increase if the New Subadvisory Agreement was approved. The Trustees also noted payments made or to be made from Veritas to the Investment Manager, and other payments made or to be made from the Investment Manager to Veritas, including certain expense sharing arrangements related to, among other things, shareholder servicing and distribution. The Trustees concluded that these arrangements were reasonable. The Trustees noted that the management fees (which include both the advisory and administration fees) and total expenses (net of applicable expense waivers/reimbursements) of Class I shares (the class of shares which is the primary focus of the Fund’s distribution) of the Fund would both be lower than the average for an appropriate peer group of similar mutual funds for the Fund once the new fee changes went into effect.

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The Board took into account management’s discussion of the proposed subadvisory fee structure, and the services Veritas is expected to provide in performing its functions under the Agreements. The Trustees also were provided with the estimated profitability of Veritas with respect to its proposed subadvisory services to the Fund. Based on the foregoing, the Trustees concluded that the profitability to Veritas is expected to be reasonable and that Veritas is not expected to realize material benefits from economies of scale that would warrant adjustments to the subadvisory fees at this time. Also with respect to economies of scale, the Trustees noted that as the Fund’s assets increase over time, the Fund may realize economies of scale with respect to certain fees and expenses, other than the Fund’s management fee, to the extent the increase in assets is proportionally greater than the increase in such fees and expenses.

In addition, the Trustees considered other potential benefits of the subadvisory relationship to Veritas, including, among others, the potential broadening of Veritas’ global equity investment capabilities, as well as the indirect benefits that Veritas may receive from Veritas’ relationship with the Fund, including any so-called “fallout benefits” to Veritas, such as reputational value derived from Veritas serving as subadviser to the Fund, which bears Veritas’ name. Taking into account all of the foregoing, the Trustees concluded that, in light of the nature, extent and quality of the services to be provided by Veritas, and the other considerations noted above with respect to Veritas, the Fund’s subadvisory fees are reasonable.

* * * *

After consideration of the foregoing, the Trustees reached the following tableconclusions (in addition to the conclusions discussed above) regarding each Agreement: (a) Veritas has demonstrated that it possesses the capability and resources to perform the duties required of it under each Agreement; (b) Veritas’ Investment Strategy is appropriate for pursuing the Fund’s investment objective; (c) Veritas is reasonably likely to execute its investment strategy consistently over time; and (d) Veritas maintains appropriate compliance programs.

Based on all of the above-mentioned factors and their related conclusions, with no single factor or conclusion being determinative and with each Trustee not necessarily attributing the same weight to each factor, the Trustees concluded that approval of each Agreement would be in the best interests of the Fund and its shareholders. Accordingly, on March 17-18, 2021, the Trustees, and separately a majority of the Independent Trustees, unanimously voted to approve each Agreement.

Required Vote

Proposal 1 must be approved by a “vote of a majority of the outstanding voting securities” of the Fund. The “vote of a majority of the outstanding voting securities” is defined in the 1940 Act as the lesser of the vote of (i) 67% or more of the voting securities of the Fund entitled to vote on Proposal 1 present at the Meeting or represented by proxy, if more than 50% of the Fund’s outstanding voting securities are present or represented by proxy; or (ii) more than 50% of the outstanding voting securities of the Fund entitled to vote on Proposal 1.

If the vote required to approve Proposal 1 is not obtained from the Fund, the New Subadvisory Agreement between the Investment Manager and Veritas will not be approved, and the Trustees will consider what other actions to take in the best interests of the Fund.

THE TRUSTEES UNANIMOUSLY RECOMMEND THAT SHAREHOLDERS OF THE FUND VOTE “FOR” PROPOSAL 1.

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PROPOSAL 2: APPROVAL OF A CHANGE IN THE FUND’S SUB-CLASSIFICATION UNDER THE 1940 ACT FROM “DIVERSIFIED” TO “NON-DIVERSIFIED”.

At a meeting held on March 17-18, 2021, the Trustees approved a change in the Fund’s sub-classification under the 1940 Act from “diversified” to “non-diversified,” and the submission of such change to Fund shareholders for approval. As a non-diversified fund, the Fund would have increased flexibility to invest a greater percentage of the Fund’s assets in the securities of fewer issuers, including any one issuer, than it currently does as a diversified fund. Section 5(b) of the 1940 Act requires mutual funds to be classified as either diversified or non-diversified, and a fund may not change its classification as a diversified fund to a non-diversified fund without shareholder approval. The Fund is currently sub-classified as a diversified fund under the 1940 Act. As a diversified fund, the Fund is generally limited as to the size of its investment in any single issuer. The 1940 Act sets forth the requirements that must be met for an investment company to be diversified. The 1940 Act requires that to qualify as a “diversified” fund, a fund may not, with respect to at least 75% of the value of its total assets, invest in securities of any issuer if, immediately after the investment, more than 5% of the total assets of the fund (taken at current value) would be invested in the securities of that issuer or the fund would hold more than 10% of the outstanding voting securities of the issuer. (Under the 1940 Act, these percentage limitations do not apply to cash or cash items (including receivables), securities issued by investment companies, or any “Government security.” A Government security is any security issued or guaranteed as to principal or interest by the United States, or by a person controlled or supervised by and acting as an instrumentality of the government of the United States pursuant to authority granted by the Congress of the United States, or any certificate of deposit for any of the foregoing.) The remaining 25% of the fund’s total assets is not subject to this restriction. This means that, with respect to the remaining 25% of the fund’s total assets, a diversified fund may invest more than 5% of its total assets in the securities of one issuer and may hold more than 10% of an issuer’s outstanding voting securities. These 1940 Act requirements do not apply to an investment company that is non-diversified.

Risks of Non-Diversification. As a non-diversified fund, the Fund will be permitted to invest a greater percentage of its assets in a single issuer or a group of issuers, and, as a result, may be subject to greater credit, market, and other risks than a diversified fund. The poor performance by a single issuer may have a greater impact on the performance of a non-diversified fund. A non-diversified fund’s shares tend to be more volatile than shares of a diversified fund and are more susceptible to the risks of focusing investments in a small number of issuers or industries, and the risks of a single economic, political or regulatory occurrence. Accordingly, the Fund’s operation as a non-diversified fund will involve more investment risk than a more diversified investment style.

Fund management believes that the ability to operate as a non-diversified Fund and invest a greater percentage of the Fund’s assets in fewer issuers or any one issuer is consistent with, and will help the Fund to pursue, its investment objective of long-term capital appreciation.

As a diversified fund, the Fund currently has a fundamental policy that it may purchase securities of any issuer only when consistent with the maintenance of its status as a diversified company under the Investment Company Act of 1940, or the rules or regulations thereunder, as such statute, rules or regulations may be amended from time to time, or under regulatory guidance or interpretations of such Act, rules or regulations. If Proposal 2 is approved, this fundamental policy will be eliminated and the Fund’s sub-classification under the 1940 Act will change from diversified to non-diversified.

If Proposal 2 is approved, the Fund will continue to be subject to diversification requirements under Subchapter M of the Internal Revenue Code of 1986, as amended (the “Internal Revenue Code”), that apply to regulated investment companies. To qualify, among other requirements, the Fund must limit its investment so that, at the close of each quarter of the taxable year, (1) not more than 25% of the Fund’s total assets will be invested in the securities of a single issuer, and (2) with respect to 50% of its total assets, not more than 5% of its total assets will be invested in the securities of a single issuer and the Fund will not own more than 10% of the outstanding voting securities of a single issuer.

Required Vote

Proposal 2 must be approved by a “vote of a majority of the outstanding voting securities” of the Fund. The “vote of a majority of the outstanding voting securities” is defined in the 1940 Act as the lesser of the vote of (i)

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67% or more of the voting securities of the Fund entitled to vote on Proposal 2 present at the Meeting or represented by proxy, if more than 50% of the Fund’s outstanding voting securities are present or represented by proxy; or (ii) more than 50% of the outstanding voting securities of the Fund entitled to vote on Proposal 2.

If the vote required to approve Proposal 2 is not obtained from the Fund, the Fund will continue to operate as a diversified fund.

THE TRUSTEES UNANIMOUSLY RECOMMEND THAT SHAREHOLDERS OF THE FUND VOTE

“FOR” PROPOSAL 2.

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PROPOSAL 3: APPROVAL OF A MODIFIED MANAGER-OF-MANAGERS STRUCTURE FOR THE FUND THAT WOULD PERMIT THE INVESTMENT MANAGER TO ENTER INTO AND MATERIALLY AMEND SUBADVISORY AGREEMENTS WITH UNAFFILIATED AND AFFILIATED SUBADVISERS WITHOUT OBTAINING SHAREHOLDER APPROVAL AND WOULD ALSO PERMIT THE FUND TO DISCLOSE FEES PAID TO SUBADVISERS ON AN AGGREGATE, RATHER THAN INDIVIDUAL, BASIS.

Under Section 15(a) of the 1940 Act, an investment adviser to a mutual fund generally cannot enter into or materially amend a subadvisory agreement without obtaining shareholder approval. The Fund currently operates in a manager-of-managers structure pursuant to the AMGF Order previously obtained by the Investment Manager and the Trust. The AMGF Order allows the Board to enter into or materially amend subadvisory agreements without a shareholder vote if the subadviser is not affiliated with the Investment Manager; if the subadviser is an affiliate, a shareholder vote is required. The Fund and the Investment Manager would like to rely on recent SEC relief that would modify the Fund’s existing manager-of-managers relief and permit the Investment Manager to enter into or materially amend a subadvisory agreement with an “affiliated person” (as such term is defined in Section 2(a)(3) of the 1940 Act) of the Investment Manager or the Fund (in addition to unaffiliated persons under the current relief) without first obtaining shareholder approval, provided that the shareholders of the Fund had previously authorized the Investment Manager to do so and the Investment Manager complies with certain conditions. In the absence of reliance on the recent SEC relief, in order to enter into or materially amend a subadvisory agreement with an affiliate, the Fund must obtain shareholder approval by undertaking the costly and time consuming effort to conduct a shareholder meeting, including preparing and distributing proxy materials and soliciting votes from shareholders. The Board believes that it is in the best interests of shareholders if the Board represents their interests in approving or rejecting recommendations made by the Investment Manager regarding subadvisers. This approach will avoid the costs and delays associated with holding shareholder meetings to obtain approval for future changes. Accordingly, the Board and the Investment Manager are asking shareholders to grant authority to the Investment Manager and the Trust to enter into and materially amend investment subadvisory agreements with subadvisers that are affiliated persons of the Investment Manager or the Fund, with the approval of the Board, but without obtaining additional shareholder approval.

Exemptive Relief

On May 29, 2019, the SEC issued the Carillon Order to Carillon Tower Advisers, Inc., et al. that allows (i) the Carillon Series Trust and its investment adviser, without the approval of fund shareholders, to enter into or amend a subadvisory agreement with a subadviser (“Subadviser Voting Relief”), including any subadviser that is an affiliated person of the investment adviser or a fund (an “Affiliated Subadviser”), and (ii) the series of Carillon Series Trust to disclose the advisory fees paid to subadvisers on an aggregate, rather than individual, basis. The Carillon Order is the first exemptive order issued by the SEC extending multi-manager exemptive relief to Affiliated Subadvisers and contains certainseveral conditions, some of which are already included in the AMGF Order.

On July 9, 2019, the staff of the SEC’s Division of Investment Management issued a no-action letter to the BNY Mellon family of funds and BNY Mellon Investment Adviser, Inc. (the “BNYM No-Action Letter”) stating that the staff would not recommend enforcement action if a fund complex and adviser that previously obtained a “manager of managers” exemptive order extends that order to cover Affiliated Subadvisers without seeking an amended exemptive order from the SEC. The staff’s no-action position is conditioned on compliance with the conditions set forth in the Carillon Order. The BNYM No-Action Letter and the Carillon Order are referred to herein as the “Relief.”

Under the Relief, the Investment Manager and the Trust are subject to several conditions imposed by the SEC to ensure that the interests of the Fund’s shareholders are adequately protected. Among these conditions are that, within ninety (90) days of the hiring of a new subadviser, shareholders of the Fund will be furnished with an information statement that contains substantially the same information about the subadviser and the subadvisory agreement that the Fund would otherwise have been required to send to shareholders in a fundproxy statement. The prospectus for which GW&K providesthe Fund will disclose the existence, substance and effect of reliance on the Relief and that the Investment Manager has the ultimate responsibility, subject to oversight by the Board, to oversee the Fund’s subadvisers and recommend their hiring, termination, and replacement. Also, as noted above, shareholders must approve the Investment Manager’s and the Fund’s authority to enter into and materially amend these investment

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subadvisory agreements. In addition, the Carillon Order permits funds to disclose fees paid to subadvisers on an aggregate, rather than individual, basis. If shareholders approve Proposal 3, and if the Fund were to have multiple subadvisers, the Fund would not be permitted to disclose fees paid to the subadvisers on an aggregate, rather than individual, basis until after it applied for and received approval from the SEC of an amendment to the AMGF Order.

Board of Trustees Recommendations

The Trustees believe that approval of the modified “manager-of-managers” structure is in the best interest of the Fund and its shareholders in order to afford the Investment Manager the flexibility to provide investment advisory services to the Fund through one or more subadvisers, including Affiliated Subadvisers, that may have particular expertise in the type of investments in which the Fund invests.

As described above, without the ability to utilize the Relief, in order for the Investment Manager and the Board to appoint a similarnew Affiliated Subadviser for the Fund or materially modify a subadvisory agreement with an Affiliated Subadviser, the Board must call and hold a shareholder meeting of the Fund, create and distribute proxy materials and solicit votes from the Fund’s shareholders. This process is time consuming and costly. Without the delay inherent in holding shareholder meetings, the Investment Manager would be able to act more quickly to appoint a new subadviser that is an affiliate if and when the Board and the Investment Manager believe that the appointment would benefit the Fund. The Trustees also took into account that if the Investment Manager and the Board appoint an Affiliated Subadviser, the Fund’s shareholders would receive an information statement containing substantially the same information about the Affiliated Subadviser and the subadvisory agreement that the Fund would otherwise have been required to send shareholders in a proxy statement. The Investment Manager and the Board will continue to be subject to their fiduciary duty to act in the best interest of the Fund and its shareholders. The Trustees believe that granting the Investment Manager and the Board maximum flexibility to select Affiliated Subadvisers, in addition to the flexibility they currently have to select unaffiliated subadvisers, without incurring the delay or expense of obtaining further shareholder approval, is in the best interest of shareholders because it will allow the Fund to operate more efficiently and cost-effectively.

Finally, the Trustees believe that they will retain sufficient oversight of the Fund’s investment subadvisory arrangements to seek to ensure that shareholders’ interests are protected whenever the Investment Manager selects an Affiliated Subadviser or materially modifies an investment subadvisory agreement with an Affiliated Subadviser, in the same manner as the Trustees currently exercise oversight of the Fund’s investment subadvisory agreements and seek to ensure that shareholders’ interests are protected whenever the Investment Manager selects unaffiliated subadvisers. The Board, including a majority of the Independent Trustees, will continue to evaluate and to approve all proposed investment subadvisory agreements, as well as any proposed modifications to existing subadvisory agreements. In doing so, the Trustees will analyze such factors as they consider to be relevant to the approval of or proposed modifications to an investment subadvisory agreement. As with the Fund’s investment advisory agreement, the terms of each investment subadvisory agreement will include those required by applicable provisions of the 1940 Act.

Subadviser Oversight

The Investment Manager serves as investment manager to the Fund under the Management Agreement. The Management Agreement provides that the Investment Manager is specifically responsible for the following services:

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In performing the functions set forth above and supervising the Fund’s subadviser, the Investment Manager:

The Investment Manager will retain these responsibilities if Proposal 3 is approved.

Required Vote

Proposal 3 must be approved by a “vote of a majority of the outstanding voting securities” of the Fund. The “vote of a majority of the outstanding voting securities” is defined in the 1940 Act as the lesser of the vote of (i) 67% or more of the voting securities of the Fund entitled to vote on Proposal 3 present at the Meeting or represented by proxy, if more than 50% of the Fund’s outstanding voting securities are present or represented by proxy; or (ii) more than 50% of the outstanding voting securities of the Fund entitled to vote on Proposal 3.

If the vote required to approve Proposal 3 is not obtained from the Fund, the Fund will continue to operate under a manager-of-managers structure pursuant to the AMGF Order and the Fund will continue to be required to seek the approval of its shareholders to enter into or materially amend subadvisory agreements with Affiliated Subadvisers.

THE TRUSTEES UNANIMOUSLY RECOMMEND THAT SHAREHOLDERS OF THE FUND VOTE “FOR” PROPOSAL 3.

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OTHER BUSINESS

The Trustees do not know of any additional matters to be presented at the Meeting other than those set forth in this Proxy Statement. If other business should properly come before the Meeting, proxies will be voted in accordance with the judgment of the persons named in the accompanying proxy or any adjournment(s) or postponement(s) thereof.

ADDITIONAL INFORMATION

Other Information

The SEC maintains an Internet website (at http://www.sec.gov), which contains proxy materials, reports, and other information filed by the Fund.

Voting Information

AMG and its affiliates intend to vote Fund shares they own, whether as seed capital or otherwise, in favor of all of the proposals. Unless otherwise provided in client guidelines, AMG and its affiliates generally intend to vote Fund shares owned in a client account over which AMG or an affiliate has discretionary authority in favor of all of the proposals. If AMG’s (or its affiliate’s) ownership, or the ownership of a client account over which AMG (or an affiliate) has discretionary authority, represents a sizeable enough portion of a Fund’s outstanding shares, the AMG (or its affiliate’s) vote will ensure that the proposals for the Fund will be approved. Please see “Principal Holders and Management Ownership” below for information regarding persons, including AMG and its affiliates, if any, that beneficially owned or owned of record 5% or more of the outstanding shares of a class of the Fund.

The adoption of any of these proposals is not contingent on the adoption of any other proposal by shareholders of the Fund.

Proxy Solicitation

The cost of preparing, printing and mailing the enclosed proxy card and proxy statement and all other costs incurred in connection with the solicitation of proxies, including any additional solicitation made by letter, telephone or facsimile will be paid by the Investment Manager and Veritas. Representatives of the Investment Manager may solicit proxies by telephone, letter or personally and will receive no additional compensation for these services. The Trust may also use one or more proxy solicitation firms to assist with the mailing and tabulation effort and any special personal solicitation of proxies. Banks, brokers, fiduciaries and nominees will, upon request, be reimbursed for their reasonable expenses in sending proxy material to beneficial owners of shares of the Fund.

AST Fund Solutions (the “Solicitor”) has been engaged to assist in the solicitation of proxies, at an estimated cost of approximately $20,700, plus expenses. As the Meeting date approaches, certain shareholders of the Fund may receive a telephone call from a representative of the Solicitor if their votes have not yet been received. Proxies that are obtained telephonically will be recorded in accordance with the procedures described below. The Trustees believe that these procedures are reasonably designed to ensure that both the identity of the shareholder casting the vote and the voting instructions of the shareholder are accurately determined.

In all cases where a telephonic proxy is solicited, the Solicitor’s representative is required to ask for each shareholder’s full name and address, or the zip code or employer identification number, and to confirm that the shareholder has received the proxy materials in the mail. If the shareholder is a corporation or other entity, the Solicitor’s representative is required to ask for the person’s title and confirmation that the person is authorized to direct the voting of the shares. If the information solicited agrees with the information provided to the Solicitor, then the Solicitor’s representative has the responsibility to explain the process, read the proposals listed on the proxy card and ask for the shareholder’s instructions on the proposals. Although the Solicitor’s representative is permitted to answer questions about the process, he or she is not permitted to recommend to the shareholder how to vote, other than to read any recommendation set forth in this Proxy Statement. The Solicitor will record the shareholder’s instructions, and within 72 hours, the shareholder will be sent a letter or e-mail to confirm his or her vote and asking the shareholder to call the Solicitor immediately if his or her instructions are not correctly reflected in the confirmation.

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If a shareholder wishes to participate in the Meeting and does not wish to authorize the execution of a proxy by telephone, mail, facsimile or Internet, the shareholder may vote at the Meeting.

If you require additional information regarding the proxy or replacement proxy cards, please call the Solicitor toll free at 866-406-2283. Any proxy given by a shareholder, whether in writing, by telephone, by facsimile or the Internet, is revocable until voted at the Meeting.

Shareholders Sharing the Same Address

The Fund will mail only one copy of this Proxy Statement to a household, even if more than one person in a household is a Fund shareholder of record, unless the Fund has received contrary instructions from one or more of the shareholders. If you need additional copies of this Proxy Statement and you are a holder of record of your shares, please call the Fund at 1-800-548-4539. If your shares are held in broker street name, please contact your financial service firm to obtain additional copies of this Proxy Statement. If in the future you do not want the mailing of proxy statements to be combined with those of other members of your household, or if you have received multiple copies of this Proxy Statement and want future mailings to be combined with those of other members of your household, please contact the Fund in writing at AMG Funds I, One Stamford Plaza, 263 Tresser Boulevard, Suite 949, Stamford, Connecticut 06901, or by telephone at 1-800-548-4539, or contact your financial service firm. The Fund undertakes to deliver promptly upon written or oral request a separate copy of the Proxy Statement to a security holder at a shared address to which a single copy of the document was delivered.

Principal Holders and Management Ownership

The total number of shares of the Fund outstanding, as of the Record Date, and information concerning the shareholders who owned beneficially or of record 5% or more of each class of the Fund’s outstanding securities, as of March 31, 2021, is set forth below.

As of the Record Date, the total number of the Fund’s outstanding shares was 1,763,094.628.

As of March 31, 2021, the following persons or entities owned of record 5% or more of each class of the Fund’s outstanding securities:

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As of April 5, 2021, all management personnel (i.e., Trustees and Officers of the Trust) as a group owned beneficially less than 1% of the outstanding shares of each class of the Fund.

Since the beginning of the most recently completed fiscal year, no Trustee has purchased or sold securities of the Investment Manager, Veritas or any of their respective parents and subsidiaries exceeding 1% of the outstanding securities of any class of securities issued by the Investment Manager, Veritas or any of their respective parents or subsidiaries.

Certain Trustees and Officers may from time to time own securities of AMG, including securities received as compensation for services to AMG or its affiliates.

The Investment Manager serves as administrator of the Fund under an Amended and Restated Administration Agreement between the Investment Manager and the Trust with respect to the Fund (the “Fund Administration Agreement”). For the fiscal year ended October 31, 2020, the Fund paid $99,353 to the Investment Manager under the Fund Administration Agreement. The Distributor serves as the principal distributor and underwriter for the Fund under a Distribution Agreement between the Distributor and the Trust with respect to the Fund, and the Trust has adopted a distribution and services plan with respect to Class N shares of the Fund (the “Plan”), in accordance with the requirements of Rule 12b-1 under the 1940 Act. For the fiscal year ended October 31, 2020, Class N shares of the Fund paid $18,652 under the Plan. The Investment Manager and Distributor will continue to provide these administrative and distribution services, respectively, to the Fund after the New Subadvisory Agreement is approved.

For the fiscal year ended October 31, 2020, the Fund did not pay any commissions to any affiliated broker-dealer.

Shareholder Proposals

The Trust does not hold regularly scheduled meetings of the shareholders of the Fund. Any shareholder desiring to present a proposal for inclusion at the meeting of shareholders next following this Meeting should submit such proposal to the Trust at a reasonable time before the solicitation is made.

TO ENSURE THE PRESENCE OF A QUORUM AT THE SPECIAL MEETING, PROMPT VOTING IS REQUESTED. A SELF-ADDRESSED, POSTAGE-PAID ENVELOPE IS ENCLOSED FOR YOUR CONVENIENCE IF YOU WISH TO VOTE BY MAIL, ALONG WITH INSTRUCTIONS ON HOW TO VOTE OVER THE INTERNET OR BY TELEPHONE SHOULD YOU PREFER TO VOTE BY ONE OF THOSE METHODS.

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APPENDIX A

The Form of New Subadvisory Agreement has been included to provide investors with information regarding its terms. It is not intended to provide any factual information about the Fund. Accordingly, shareholders should not rely on the representations and warranties in the Form of New Subadvisory Agreement as characterizations of the actual state of facts at the time they were made or otherwise. In addition, the Form of New Subadvisory Agreement may be revised from that shown here prior to its execution, and may be amended after its execution. Should material changes be made to the Form of New Subadvisory Agreement, the Fund will take such steps as may be required by applicable law.

FORM OF NEW SUBADVISORY AGREEMENT BETWEEN THE INVESTMENT MANAGER AND GANNETT WELSH & KOTLER, LLCVERITAS ASSET MANAGEMENT LLP WITH RESPECT TO AMG GW&K CORE BONDVERITAS GLOBAL FOCUS FUND

AGREEMENT made as of the [    ] day of [            ],, ], between AMG FUNDS LLC, a limited liability company organized under the laws of the state of Delaware and having its principal place of business in Norwalk,at One Stamford Plaza, 263 Tresser Boulevard, Suite 949, Stamford, Connecticut 06901 (the “Adviser”) and GANNETT WELSH & KOTLER, LLC,VERITAS ASSET MANAGEMENT LLP, a limited liability companypartnership organized under the laws of the State of DelawareUnited Kingdom and having its principal place of business at 222 Berkeley Street, 15^th Floor, Boston, Massachusetts 021161 Smart’s Place, London WC2B 5LW (the “Subadvisor”“Subadviser”).

WHEREAS, the Adviser is engaged principally in the business of rendering investment management services and is registered as an investment adviser under the Investment Advisers Act of 1940, as amended (the “Advisers Act”); and

WHEREAS, the SubadvisorSubadviser is engaged principally in the business of rendering investment management services and is registered as an investment adviser under the Advisers Act; and

WHEREAS, AMG FundsFUNDS I, a Massachusetts business trust (the “Trust”), engages in business as an open-end management investment company and is so registered under the Investment Company Act of 1940, as amended (the “1940 Act”); and

WHEREAS, the Trust is authorized to issue shares of beneficial interest in separate series, with each such series representing interests in a separate portfolio of securities and other assets; and

WHEREAS, the Trust offers shares in a series, AMG GW&K Core BondVeritas Global Focus Fund (the “AMG Veritas Global Focus Fund”), such series together with all other series established by the Trust with respect to which the Subadviser renders management and investment advisory services pursuant to the terms of this Agreement, being herein referred to as the “Fund”); and

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WHEREAS, pursuant to an Investment Management Agreement, dated as of July 31, 2003, as amended, between the Trust and the Adviser, as amended (the “Advisory Agreement”), the Adviser is required to perform investment advisory services for the Fund and is permitted to subcontract for the performance of any of the services contemplated to be rendered by the Adviser to any series of the Trust.Fund.

NOW, THEREFORE, WITNESSETH: That it is hereby agreed between the parties hereto as follows:

1. APPOINTMENT OF SUBADVISER.

(a) AMG Veritas Global Focus Fund. The Adviser hereby employs the SubadvisorSubadviser to provide investment advisory services to theAMG Veritas Global Focus Fund for the period and on the terms herein set forth. The SubadvisorSubadviser accepts such appointment and agrees to render the services herein set forth, for the compensation herein provided. In accordance with the rules of the Financial Conduct Authority the “FCA Rules”), the Subadviser has categorized the Adviser as a professional client and the Adviser agrees and warrants that it is a professional client.

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(b) Additional Funds. In the event that the Trust establishes one or more series of shares other than the AMG Veritas Global Focus Fund with respect to which the Adviser desires to retain the Subadviser to render investment advisory services hereunder, the Adviser shall so notify the Subadviser in writing, indicating the advisory fee to be payable with respect to the additional series of shares. If the Subadviser is willing to render such services on the terms provided for herein, it shall so notify the Adviser in writing, whereupon such series shall become a Fund hereunder.

2. DUTIES OF ADVISER AND SUBADVISER.

(i)Delivery of Documents. The Adviser has furnished the SubadvisorSubadviser with true copies of each of the following:

(a) The Trust’s MasterAmended and Restated Agreement and Declaration of Trust, Agreement, as filed with the Secretary of State of The Commonwealth of Massachusetts and all amendments and supplements thereto (such MasterAmended and Restated Agreement and Declaration of Trust, Agreement, as presently in effect and as it shall from time to time be amended or supplemented, is herein called the “Declaration”);

(b) The Trust’s By-Laws and amendments and supplements thereto (such By-Laws, as presently in effect and as it shall from time to time be amended and supplemented, is herein called the “By-Laws”“By-Laws”);

(c) Resolutions of the Trust’s Board of Trustees authorizing the appointment of the Adviser and SubadvisorSubadviser and approving the Advisory Agreement and this Agreement and copies of the minutes of the initial meeting of shareholders of the Fund;

(d) The Trust’s Registration Statement and each Post-Effective Amendment thereto on Form N-1A under the Securities Act of 1933 as amended (the “1933 Act”) and the 1940 Act (File Nos. 333-84639033-44909 and 811-09521)811-06520) with respect to the Fund as filed with the Securities and Exchange Commission and all amendments thereto (the “Registration Statement”);

(e) The most recent prospectus (such prospectus, as in effect from time to time and all amendments and supplements thereto are herein called a “Prospectus”) of the Fund;

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(f) All resolutions of the Board of Trustees of the Trust pertaining to the objectives, investment policies and investment restrictions of the Fund; and

(g) Copies of the executed Advisory Agreement between the Trust and the Adviser relating to the Fund.

The Adviser will furnish the SubadvisorSubadviser from time to time with copies of all amendments of or supplements to items (a), (b), (c), (d), (e), (f), and (g) to the extent such amendments or supplements relate to or affect the obligations of the SubadvisorSubadviser hereunder with respect to AMG Veritas Global Focus Fund or any other series of the Fund.Trust that hereafter becomes a Fund hereunder.

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(ii) The Subadvisor,Subadviser, at its own expense, (except as otherwise provided herein), shall furnish the following services to the Trust with respect to theeach Fund:

(a)Investment Program. The SubadvisorSubadviser is hereby authorized and directed and hereby agrees, subject to the stated investment objective and policies of the Fund as set forth in the Trust’s current Registration Statement and subject to the supervision of the Adviser and the Board of Trustees of the Trust, to (i) develop and furnish continuously an investment program and strategy for the Fund in compliance with the Fund’s investment objective and policies as set forth in the Trust’s current Registration Statement, (ii) provide research and analysis relative to the investment program and investments of the Fund, (iii) determine (subject to the overall supervision of the Board of Trustees of the Trust) what investments shall be purchased, held, sold or exchanged by the Fund and what portion, if any, of the assets of the Fund shall be held in cash or cash equivalents, and (iv) make changes on behalf of the Trust in the investments of the Fund. In accordance with Paragraphparagraph 2(ii)(b), the SubadvisorSubadviser shall arrange for the placing of all orders for the purchase and sale of securities and other investments for the Fund’s account and will exercise full discretion and act for the Trust in the same manner and with the same force and effect as the Trust might or could do with respect to such purchases, sales or other transactions, as well as with respect to all other things necessary or incidental to the furtherance or conduct of such purchases, sales or transactions. The SubadvisorSubadviser will make its officers and employees available to meet with the Adviser’s officers and directors on reasonabledue notice at reasonable times to review the investments and investment program of the Fund in light of current and prospective economic and market conditions. The SubadvisorSubadviser is authorized on behalf of the Fund to enter into agreements and execute any documents required to make investments pursuant to the Prospectus as may be amended from time to time. The Subadvisor’sSubadviser’s responsibility for providing portfolio management services hereunder shall be limited to only those assets of the Fund which the Adviser determines to allocate to the SubadvisorSubadviser (those assets being referred to as the “Fund Account”), and the SubadvisorSubadviser agrees that it shall not consult with any investment advisor(s) (within the meaning of the 1940 Act) to the Fund or

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any other registered investment company or portfolio series thereof under common control with the Fund concerning transactions for the Fund Account in securities or other assets such that the exemptions under Rule 10f-3, Rule 12d-3 and/or Rule 17a-10 under the 1940 Act would not be available with respect to the Fund.

The SubadvisorSubadviser shall exercise voting authority with respect to proxies that the Fund is entitled to vote by virtue of the ownership of assets attributable to that portion of the Fund for which the SubadvisorSubadviser has investment management responsibility; provided that the exercise of such authority shall be subject to periodic review by the Adviser and the Trustees of the Trust; provided, further that such authority may be revoked in whole or in part by the Adviser if required by applicable law. The SubadvisorSubadviser shall exercise its proxy voting authority hereunder in accordance with such proxy voting policies and procedures as the Trust may designate from time to time. The SubadvisorSubadviser shall provide such information relating to its exercise of proxy voting authority hereunder (including the manner in which it has voted proxies and its resolution of conflicts of interest) as reasonably requested by the Adviser from time to time.

In the performance of its duties hereunder, the SubadvisorSubadviser is and shall be an independent contractor and except as expressly provided for herein or otherwise expressly provided or authorized shall have no authority to act for or represent the Fund or the Trust in any way or otherwise be deemed to be an agent of the Fund, the Trust or of the Adviser. If any occasion should arise in which the SubadvisorSubadviser gives any advice to its clients concerning the shares of a Fund, the SubadvisorSubadviser will act solely as investment counsel for such clients and not in any way on behalf of the Trust or the Fund.

(b)Portfolio Transactions. In connection with the management of the investment and reinvestment of the Fund, the Subadvisor,Subadviser, acting by its own officers, directors or employees or by a duly authorized subcontractor, is authorized to select the broker or dealers that will execute purchase and sale transactions for the Trust.

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In executing portfolio transactions and selecting brokers or dealers, if any, the SubadvisorSubadviser will use its best efforts to seek on behalf of the Fund the best overall terms available. In assessing the best overall terms available for any transaction, the SubadvisorSubadviser shall consider all factors it deems relevant, including the breadth of the market in and the price of the security, the financial condition and execution capability of the broker or dealer, and the reasonableness of the commission, if any, with respect to the specific transaction and on a continuing basis. In evaluating the best overall terms available, and in selecting the broker or dealer, if any, to execute a particular transaction, the SubadvisorSubadviser may also consider the brokerage and research services (as those terms are defined in Section 28(e) of the Securities

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Exchange Act of 1934) provided to the SubadvisorSubadviser with respect to the Fund and/or other accounts over which the SubadvisorSubadviser exercises investment discretion. The SubadvisorSubadviser may pay to a broker or dealer who provides such brokerage and research services a commission for executing a portfolio transaction which is in excess of the amount of commission another broker or dealer would have charged for effecting that transaction if, but only if, the SubadvisorSubadviser determines in good faith that such commission was reasonable in relation to the value of the brokerage and research services provided.

The SubadvisorSubadviser may buy securities for the Fund at the same time it is selling such securities for another client account and may sell securities for the Fund at the time it is buying such securities for another client account. In such cases, subject to applicable legal and regulatory requirements, and in compliance with such procedures of the Trust as may be in effect from time to time, the SubadvisorSubadviser may effectuate cross transactions between the Fund and such other account if it deems this to be advantageous. The SubadvisorSubadviser also may cause the Fund to enter into other types of investment transactions(e.g. (e.g., a long position on a particular securities index) at the same time it is causing other client accounts to take opposite economic positions(e.g. (e.g., a short position on the same index).

On occasions when the SubadvisorSubadviser deems the purchase or sale of a security to be in the best interest of the Fund as well as other clients, the Subadvisor,Subadviser, to the extent permitted by applicable laws and regulations, and in compliance with such procedures of the Trust as may be in effect from time to time, may aggregate the securities to be sold or purchased in order to obtain the best execution and lower brokerage commissions, if any. In such event, allocation of the securities so purchased or sold, as well as the expenses incurred in the transaction, will be made by the SubadvisorSubadviser in the manner it considers to be the most equitable and consistent with its fiduciary obligations to the Fund and to such clients. The Adviser accepts that each individual aggregated transaction may operate to the advantage or disadvantage of the Fund.

The SubadvisorSubadviser confirms that is it has in place adequate arrangements for the management of conflicts of interest that may arise in relation to the services it provides under this Agreement. A copy of the Subadviser’s conflicts of interest policy (and updates thereto) will be made available to the Adviser.

The Subadviser will advise the Fund’s custodian or such depository or agents as may be designated by the custodian and the Adviser promptly of each purchase and sale of a portfolio security, specifying the name of the issuer, the description and amount or number of shares of the security purchased, the market price, the commission and gross or net price, the trade date and settlement date and the identity of the effecting broker or dealer. The SubadvisorSubadviser shall not have possession or custody of any Fund investments. The Trust shall be responsible for all custodial agreements and the payment of all custodial charges and fees and, upon the SubadvisorSubadviser giving proper instructions to the custodian, the SubadvisorSubadviser shall have no responsibility or liability for the acts, omissions or other conduct of the custodian.

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The SubadvisorSubadviser shall, upon due notice from the Adviser, provide such periodic and special reports describing any such research, advice or other

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services received and the incremental commissions, net price or other consideration to which they relate.

Notwithstanding the foregoing, the SubadvisorSubadviser agrees that the Adviser shall have the right by written notice to identify specific issuers,securities that may not be purchased on behalf of the Fund and/or brokers orand dealers affiliated with the Adviser, or as otherwise required by applicable law with respect to a particular issuer, broker or dealer, in which or through which portfolio transactionstransaction on behalf of the Fund may not be engagedeffected, including, without limitation, brokers or effected.dealers affiliated with the Adviser. The SubadvisorSubadviser shall refrain from engagingpurchasing such securities for the Fund or effectingdirecting any portfolio transaction to any such transactionsbroker or dealer on behalf of the Fund, unless and until the written approval of the Adviser to do so is obtained, but the SubadvisorSubadviser shall not be liable to the Fund for so acting. In addition, the SubadvisorSubadviser agrees that it shall not direct portfolio transactions for the Fund through any broker or dealer that is an “affiliated person” of the SubadvisorSubadviser (as that term is defined in the 1940 Act or interpreted under applicable rules and regulations of the Securities and Exchange Commission) without the prior written approval of the Adviser, which shall not be unreasonably withheld, and in no event shall the Subadvisor direct portfolio transactions on behalf of the Fund to any broker/dealer in recognition of sales of shares of any investment company or receipt of research or other service without prior written approval of the Adviser, which shall not be unreasonably withheld. The Adviser agrees that it will provide the SubadvisorSubadviser with a list of brokers and dealers that are “affiliated persons” of the Fund.

Details of the Subadviser’s Order Execution Policy shall be made available to the Adviser who hereby confirms that it has read and understood this policy and agrees to it, in particular the Adviser agrees that the Subadviser may trade outside of Regulated Market and Multilateral Trading Facility (“MTF”). Both parties agree that a MTF shall be defined as a multilateral system set up in accordance with the Markets and Financial Instruments Directive (“MiFID”) which brings together multiple buying and selling interests in financial instruments in accordance with the non-discretionary rules in a way that results in a contract.

(c)Reports. The SubadvisorSubadviser shall render to the Board of Trustees of the Trust such periodic and special reports as the Board of Trustees may reasonably request with respect to matters relating to the duties of the SubadvisorSubadviser set forth herein.

(iii) Notwithstanding anything to the contrary in this Agreement, the SubadvisorSubadviser shall have the right to engage a third-party for purposes of providing proxy advisory and/or voting services.

3. SUBADVISORY FEE.

For the services to be provided by the SubadvisorSubadviser as provided in Paragraph 2 hereof, the Adviser shall pay to the SubadvisorSubadviser an annual fee as set forth on Schedule A to this Agreement.

In the case of commencement or termination of this Agreement with respect to theany Fund during any calendar month, the fee with respect to thesuch Fund for that month shall be reduced proportionately based upon the number of calendar days during which it is in effect, and the fee shall be computed duringbased on the average daily net assets of the Fund Account for the days during which it is in effect. The Advisor will provide documentation to the Subadvisor to substantiate the average daily net assets of the Fund.

4. EXPENSES.

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During the term of this Agreement, the SubadvisorSubadviser will bear all expenses of the Subadvisor thatincurred by it incurs in the performance of its duties hereunder, other than those expenses specifically assumed by the Trust hereunder. Subject to any expense limitation agreement as in effect from time to time with respect to the Fund, the Trust shall assume and shall pay all Fund expenses, including without limitation (i) issue and transfer taxes chargeable to the Trust in connection with securities transactions to which theany Fund is a party, and (ii) interest on borrowed money, if any, and (iii)any. In addition to these expenses, the Trust shall pay all brokers’ and underwriting commissions chargeable to the Trust in connection with the securities transactions to which theany Fund is a party.

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5. COMPLIANCE WITH APPLICABLE REGULATIONS.

In performing its duties hereunder, the Subadvisor:Subadviser

(i) shall establish compliance procedures (copies of which shall be provided to the Adviser, and shall be subject to review and approval by the Adviser) reasonably calculated to ensure compliance at all times with: all applicable provisions of the 1940 Act and the Advisers Act, and any rules and regulations adopted thereunder; Subchapter M of the Internal Revenue Code of 1986, as amended; the provisions of the Registration Statement; the provisions of the Declaration and the By-Laws of the Trust, as the same may be amended from time to time; and any other applicable provisions of state, federal or foreign law.

(ii) acknowledges that the Trust has adopted a written code of ethics complying with the requirements of Rule 17j-1 under the 1940 Act and that the SubadvisorSubadviser and certain of its employees, officers and directors may be subject to reporting requirements thereunder and, accordingly, agrees that it shall, on a timely basis, furnish, and shall cause its employees, officers and directors to furnish, to the Adviser and/or to the Trust, all reports and information required to be provided under such code of ethics with respect to such persons.

(iii) agrees that it will maintain for the Trust all and only such records as required under Rules 31a-1 and 31a-2 under the 1940 Act in respect to its services hereunder and that such records are the property of the Trust and further agrees to surrender promptly to the Trust any such records upon the Trust’s request all in accordance with Rule 31a-3 under the 1940 Act.

6. LIABILITY OF SUBADVISER; INDEMNIFICATION.

Neither the SubadvisorSubadviser nor the officers, directors, employees, agents, or legal representatives (collectively, “Related Persons”) of the SubadvisorSubadviser shall be liable for any error of judgment or mistake of law, or for any loss suffered by theany Fund

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or its shareholders in connection with the matters to which this Agreement relates; provided that, except as set forth in the succeeding paragraph, no provision of this Agreement shall be deemed to protect the SubadvisorSubadviser or its Related Persons against any liability to which it might otherwise be subject by reason of any willful misfeasance, bad faith or negligence or the reckless disregard of the Subadvisor’sSubadviser’s obligations and duties (each of which is hereby referred to as a “Culpable Act”) under this Agreement.

Neither the SubadvisorSubadviser nor its Related Persons shall be liable for any error of judgment or mistake of law, or for any loss suffered by the Adviser or its Related Persons in connection with the matters to which this Agreement relates; provided that this provision shall not be deemed to protect the SubadvisorSubadviser or its Related Persons against any liability to which it might otherwise be subject by reason of any Culpable Act by the SubadvisorSubadviser or its Related Persons.

The Adviser shall indemnify the SubadvisorSubadviser and its Related Persons and hold them harmless from and against any and all actions, suits or claims whether groundless or meritorious and from and against any and all losses, damages, costs, charges, reasonable counsel fees, payments, expenses and liabilities (collectively, “Damages”) arising directly or indirectly out of or in connection with the performance of services by the SubadvisorSubadviser or its Related Persons hereunder to the extent such Damages result from any Culpable Act of the Adviser or any Related Person of the Adviser.

The SubadvisorSubadviser shall indemnify the Adviser and its Related Persons from and against any Damages arising directly or indirectly out of or in connection with the performance of services by the Adviser or its Related Persons under this Agreement or the Advisory Agreement, in each case, to the extent such Damages result from any Culpable Act of the SubadvisorSubadviser or any of its Related Persons.

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For the avoidance of doubt, both parties agree that no warranty is given by the Subadviser as to the performance of the Fund or any part of it or that the investment objective will be achieved.

7. REPRESENTATIONS AND WARRANTIES.

(a)Adviser. The Adviser represents and warrants to the SubadvisorSubadviser that (i) the retention of the SubadvisorSubadviser by the Adviser as contemplated by this Agreement is authorized by the respective governing documents of the Trust and the Adviser; (ii) the execution, delivery and performance of each of this Agreement and the Advisory Agreement does not violate any obligation by which the Trust or the Adviser or their respective property is bound, whether arising by contract, operation of law or otherwise; and (iii) each of this Agreement and the Advisory Agreement has been duly authorized by appropriate action of the Trust and the Adviser and when executed and delivered by the Adviser will be the legal, valid and binding obligation of the Trust and the Adviser, enforceable against the Trust and Adviser in accordance with its terms hereof subject, as to enforcement,

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to applicable bankruptcy, insolvency and similar laws affecting creditors’ rights generally and to general equitable principles (regardless of whether enforcement is sought in a proceeding in equity or law).

(b)SubadvisorSubadviser. The SubadvisorSubadviser represents and warrants to the Adviser that (i) the retention of the SubadvisorSubadviser by the Adviser as contemplated by this Agreement is authorized by the Subadvisor’sSubadviser’s governing documents; (ii) the execution, delivery and performance of this Agreement does not violate any obligation by which the SubadvisorSubadviser or its property is bound, whether arising by contract, operation of law or otherwise; and (iii) this Agreement has been duly authorized by appropriate action of the SubadvisorSubadviser and when executed and delivered by the SubadvisorSubadviser will be the legal, valid and binding obligation of the Subadvisor,Subadviser, enforceable against the SubadvisorSubadviser in accordance with its terms hereof, subject, as to enforcement, to applicable bankruptcy, insolvency and similar laws affecting creditors’ rights generally and to general equitable principles (regardless of whether enforcement is sought in a proceeding in equity or law).

8. DURATION AND TERMINATION OF THIS AGREEMENT.

(a)Effective Date; TermDuration. This Agreement shall become effective with respect to AMG Veritas Global Focus Fund on [            ][______] (the “Effective Date”). and, with respect to any additional Fund, on the date of receipt by the Adviser of notice from the Subadviser in accordance with Paragraph 1(b) hereof that the Subadviser is willing to serve as Subadviser with respect to such Fund. Unless terminated as herein provided, this Agreement shall remain in full force and effect for two years from the Effective Date.Date with respect to AMG Veritas Global Focus Fund and, with respect to each additional Fund, for two years from the date on which such Fund becomes a Fund hereunder. Subsequent to such initial periodperiods of effectiveness, this Agreement shall continue in full force and effect for periods of one year thereafter with respect to any such Fund so long as such continuance with respect to any such Fund is approved at least annually (a) by either the Trustees of the Trust or by vote of a majority of the outstanding voting securities (as defined in the 1940 Act) of thesuch Fund, and (b) in either event, by the vote of a majority of the Trustees of the Trust who are not parties to this Agreement or “interested persons” (as defined in the 1940 ActAct) of any such party, cast in person at a meeting called for the purpose of voting on such approval.approval to the extent required by applicable law.

(b)Amendment. This Agreement may be amended at any time, but only by written agreement betweenof the Subadvisor andparties, provided that the Manager, which amendment is subject toshall be approved both by the approvalvote of a majority of the Trustees and the shareholders of the Trust, including a majority of the Trustees who are not parties to this Agreement or interested persons of any such party to this Agreement cast in person at a meeting called for that purpose to the mannerextent required by applicable law, and, to the extent required by the 1940 Act, by the holders of a majority of the outstanding voting securities of the Trust in the manner required by the 1940 Act.

(c)Termination. This Agreement may be terminated by (i) the Adviserwith respect to any Fund at any time, without payment of any penalty, upon notice to(i) by vote of the Subadvisor and the Trust, (ii) at any time without penalty byTrustees of the Trust or by vote of a majority of the outstanding

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voting securities of the Fund (as defined in the 1940 Act) on notice toof that Fund, (ii) by the SubadvisorAdviser, or (iii) by the Subadvisor at any time without penalty, upon thirty (30)Subadviser, in each case on sixty (60) days’ prior written notice to the Adviser and the Trust.other party. Upon the effective date of termination of this

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Agreement, the SubadvisorSubadviser shall deliver all books and records of the Trust or theany Fund held by it (A)(i) to such entity as the Trust may designate as a successor, or (B)(ii) to the Adviser.

(d)Automatic Termination. This Agreement shall automatically and immediately terminate in the event of its assignment (as defined in the 1940 Act). The SubadvisorSubadviser shall notify the Trust in writing sufficiently in advance of any proposed change of control, as defined in Section 2(a)(9) of the 1940 Act, as will enable the Trust to consider whether an assignment under the 1940 Act will occur, and to take the steps necessary to enter into a new contract with the SubadvisorSubadviser or such other steps as the Trustees of the Trust may deem appropriate.

(e)Approval, Amendment or Termination by Individual Fund. Any approval, amendment or termination of this Agreement by the holders of a majority of the outstanding voting securities (as defined in the 1940 Act) of theany Fund shall be effective to continue, amend or terminate this Agreement with respect to any such Fund notwithstanding (i) that such action has not been approved by the holders of a majority of the outstanding voting securities of any other Fund affected thereby, and (ii) that such action has not been approved by the vote of a majority of the outstanding voting securities of the Trust, unless such action shall be required by any applicable law or otherwise.

9. SERVICES NOT EXCLUSIVE.

The services of the SubadvisorSubadviser to the Adviser in connection with thea Fund hereunder are not to be deemed exclusive, and the SubadvisorSubadviser shall be free to render similar services to others so long as its services hereunder are not impaired thereby. It is understood that the persons employed by the SubadvisorSubadviser to assist in the performance of its duties hereunder will not devote their full time to such services and nothing hereunder contained shall be deemed to limit or restrict the right of the SubadvisorSubadviser to engage in or devote time and attention to other businesses or to render services of whatever kind or nature.

10. RESERVATION OF NAME.

The parties hereby acknowledge that AMG Funds LLC has reserved the right to grant the nonexclusive use of the name “AMG” or “AMG Funds” or any derivative thereof to any other investment company, investment adviser, distributor or other business enterprise, and to withdraw from the Trust the use of the name “AMG” or “AMG Funds.” The name “AMG” or “AMG Funds” will continue to be used by the Trust so long as such use is mutually agreeable to AMG Funds LLC and the Trust. The SubadvisorSubadviser and the Trust acknowledge that the Trust shall cease using the name “AMG” or “AMG Funds” as a part of the Trust’s name and that the Subadvisor,Subadviser, the Trust or theany Fund, or any of their affiliates, shall not promote the Trust or theany Fund or conduct the business of

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the Trust or theany Fund in any way in such name if this Agreement is terminated for any reason and the Adviser does not expressly consent in writing to such use of the name “AMG” or “AMG Funds.” Future names adopted by the Trust for itself or theany Fund, insofar as such names include identifying words requiring the consent of the Adviser, shall be the property of the Adviser and shall be subject to the same terms and conditions. Notwithstanding the above, AMG Funds LLC consents to the use of its name, including in connection with the name of the Trust or thea Fund, in a representative client list in connection with the completion of marketing materials.

11. CONFIDENTIALITY.

The Subadviser shall treat as confidential all information pertaining to a Fund and actions of the Fund, the Adviser and the Subadviser, provided that it may disclose such information to those third parties required to carry out its duties hereunder, and the Adviser shall treat as confidential all information furnished to the Fund or the Adviser by the Subadviser in connection with its duties under the Agreement, provided that it may disclose such information to those third parties required to carry out its duties hereunder (collectively, the “Confidential Information”). The term “Confidential Information” will not include information which (i) is or becomes publicly

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available other than as a result of a disclosure by a receiving party in violation of this Agreement, (ii) is or becomes available to a receiving party on a nonconfidential basis from a source which, to the best knowledge of the receiving party after reasonable inquiry, is not prohibited from disclosing such information by a legal, contractual or fiduciary obligation to the other, or (iii) is independently developed without reference to or reliance on the Confidential Information.

In the event that a party is requested pursuant to, or required by, applicable law, regulation or legal process to disclose any of the Confidential Information, such party will promptly notify the disclosing party so that it may seek a protective order or other appropriate remedy or, in its sole discretion, waive compliance with the terms of this Agreement. In the event that no such protective order or other remedy is obtained, or a party does not waive compliance with the terms of this Agreement, a party will furnish only that portion of the Confidential Information which it is advised by counsel is legally required and will exercise all reasonable efforts to obtain reliable assurance that confidential treatment will be accorded the Confidential Information.

12. MISCELLANEOUS.

(a)Notices. All notices or other communications given under this Agreement shall be made by guaranteed overnight delivery,e-mail, telecopy or certified mail; notice is effective when received. Notice shall be given to the parties at the following addresses:

(b)Severability. If any provision of this Agreement shall be held or made invalid by a court decision, statute, rule or otherwise, the remainder shall not be thereby affected.

(c)Applicable Law. This Agreement shall be construed in accordance with and governed by the laws of the Commonwealth of Massachusetts, without regardMassachusetts.

(d) Anti-Bribery & Corruption. Both parties agree to conflictscomply with all laws, statutes, regulations and codes applicable to them in their home jurisdiction relating to anti-bribery and anti-corruption.

(e) Data Protection. The parties will comply with their obligations with regards data protection as set out in all laws applicable to them in their home jurisdiction from time to time, relating to the processing of law principles.personal data and/or privacy. The Subadviser’s Privacy Notice may be viewed on www.vamllp.com and a copy of its Data Protection Policy will be made available on request. Telephone calls will only be recorded for monitoring purposes to the extent required by applicable laws and/or regulations.

(d)(f) Complaints. All formal complaints should in the first instance be made in writing to the compliance officer of the Subadviser and a copy of its complaints policy will be provided to the Adviser.

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(g) Counterparties. This Agreement may be executed simultaneously in two or more counterparts, each of which shall be deemed an original, but all of which together shall constitute one and the same instrument.

(e)(h) Entire Agreement. This Agreement states the entire agreement of the parties hereto, and is intended to be the complete and exclusive statement of the terms hereof. It may not be added to or changed orally, and may not be modified or rescinded except by a writing signed by the parties hereto and in accordance with the 1940 Act, when applicable.

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IN WITNESS WHEREOF, the Adviser and the SubadvisorSubadviser have caused this Agreement to be executed as of the date first set forth above.

Acknowledged and agreed to as of the date first set forth above with respect to the Trust’s obligations under this Agreement.

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SCHEDULE A

AMG GW&K Core BondVeritas Global Focus Fund

The Adviser shall payFor services provided to the SubadvisorFund Account, the Adviser will pay a base monthly fee for each calendar month at an annual grossrate of 0.49% of the average net assets in the Fund Account during the month. Average assets shall be determined using the average daily net assets in the Fund Account during the month.

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APPENDIX B

Filed pursuant to 497(e)

File Nos. 033-44909 and 811-06520

AMG FUNDS I

AMG FQ Tax-Managed U.S. Equity Fund

Supplement dated March 19, 2021 to the Prospectus, dated February 1, 2021

The following information supplements and supersedes any information to the contrary relating toAMG FQ Tax-Managed U.S. Equity Fund (the “Fund”), a series of AMG Funds I (the “Trust”), contained in the Fund’s Prospectus (the “Prospectus”), dated as noted above.

At a meeting held on March 17-18, 2021 (the “Meeting”), the Trust’s Board of Trustees (the “Board”) approved the appointment of Veritas Asset Management LLP (“Veritas” or the “Subadviser”) as the subadviser to the Fund on an interim basis to replace First Quadrant, L.P. (“First Quadrant”), effective May 21, 2021 (the “Implementation Date”). The appointment of Veritas is pursuant to an interim subadvisory agreement between AMG Funds LLC (“AMGF”) and Veritas (the “Interim Subadvisory Agreement”), to be effective until the earlier of 150 days after the termination of the existing subadvisory agreement between AMGF and First Quadrant with respect to the Fund (the “Existing Subadvisory Agreement”), which will occur on May 21, 2021, or the approval of a new subadvisory agreement between AMGF and Veritas by the Board and Fund shareholders. At the Meeting, the Board also approved the longer-term appointment of Veritas as the subadviser to the Fund, a new subadvisory agreement between AMGF and Veritas (the “New Subadvisory Agreement”), and the submission of the New Subadvisory Agreement to Fund shareholders for approval. The rate of compensation to be received by Veritas under the Interim Subadvisory Agreement approved by the Board is lower than the rate of compensation that First Quadrant receives under the Existing Subadvisory Agreement.

In connection with the hiring of Veritas, effective as of the Implementation Date, the Fund will (i) change its name from AMG FQ Tax-Managed U.S. Equity Fund to AMG Veritas Global Focus Fund, (ii) make changes to its investment objective, principal investment strategies and principal risks, and (iii) replace its existing benchmark index with the MSCI World Index.

Also in connection with the hiring of Veritas, the Board approved the following fee changes for the Fund, which will be implemented upon the effectiveness of the New Subadvisory Agreement and will result in the overall reduction of the Fund’s net expense ratios: the management fee for the Fund will be reduced from 0.70% to 0.67%; and (ii) the Fund’s existing contractual expense limitation agreement with AMGF will be replaced with a new contractual expense limitation agreement with AMGF pursuant to which AMGF will agree, through at least March 1, 2023, to limit total annual operating expenses (exclusive of taxes, interest (including interest incurred in connection with bank and custody overdrafts and in connection with securities sold short), shareholder servicing fees, distribution and service (12b-1) fees, brokerage commissions and other transaction costs, dividends payable with respect to securities sold short, acquired fund fees and expenses, and extraordinary expenses) of the Fund to the annual rate of 0.88% of the Fund’s average daily net assets, subject to later reimbursement by the Fund in certain circumstances. AMGF pays a portion of the management fee to the Fund’s subadviser for its services.

The disposition of Fund securities in connection with the transition of the Fund’s investment objective and strategies is expected to cause the Fund to realize taxable income for U.S. federal income tax purposes. The Fund intends to make a special distribution to shareholders of all or a portion of such income and any other undistributed income for the current taxable year. This distribution will be taxable to shareholders who hold their shares in a taxable account. See “Certain Federal Income Tax Information” for further information.

In addition, effective as of the Implementation Date, the Prospectus is amended as follows:

All references to the name of the Fund shall refer to AMG Veritas Global Focus Fund. All references to First Quadrant shall be deleted and all references to the subadviser to the Fund shall refer to Veritas. All references to

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Jia Ye and David Chrisman as portfolio managers of the Fund shall be deleted and all references to the portfolio managers of the Fund shall refer to Andrew Headley and Mike Moore.

The section titled “Summary of the Funds – AMG FQ Tax-Managed U.S. Equity Fund – Investment Objective” on page 3 is deleted and replaced with the following:

INVESTMENT OBJECTIVE

AMG Veritas Global Focus Fund (the “Fund”) seeks to provide long-term capital appreciation.

The section titled “Summary of the Funds – AMG FQ Tax-Managed U.S. Equity Fund – Principal Investment Strategies” on page 3 is deleted and replaced with the following:

PRINCIPAL INVESTMENT STRATEGIES

The Fund intends to invest in equity securities of a relatively select group of global companies, identified through a bottom up stock picking approach with certain strategic themes identified by Veritas Asset Management LLP, the subadviser to the Fund (“Veritas” or the “Subadviser”). The Subadviser seeks to identify and invest in businesses at reasonable valuations. The Subadviser seeks to identify industry leaders in relatively stable industries where there is greater visibility of sustainable earnings and recurring revenues, but equity investments must generally satisfy a number of demanding valuation criteria, with particular attention paid to the level of free cash flow generation from the business.

The Fund will take focused equity positions identified via the analysis of the Subadviser, which will focus on identifying long term themes and trends and then proceed to identifying companies within those themes and trends that it believes have sound business models, strong management and disciplined financial controls. The themes and trends are identified with an emphasis on in-house research, although external research is also used.

The Fund will generally invest in mid- to large-capitalization companies, although the Fund may also invest in small-capitalization companies. The Fund generally invests in companies with market capitalizations greater than $5 billion. The Fund currently expects to hold between 25 and 40 positions.

Additionally, under normal circumstances, the Fund invests at least 35% (or if conditions are not favorable, in the view of Veritas, at least 25%) of its net assets in investments economically tied to countries other than the U.S., and the Fund will hold investments economically tied to a minimum of three countries other than the U.S. The Fund considers an investment to be economically tied to a country other than the U.S. if it provides investment exposure to a non-U.S. issuer. The Fund considers a company to be a non-U.S. issuer if (i) it is organized outside the U.S. or maintains a principal place of business outside the U.S., (ii) its securities are traded principally outside the U.S., or (iii) during its most recent fiscal year, it derived at least 50% of its revenues or profits from goods produced or sold, investments made, or services performed outside the U.S. or it has at least 50% of its assets outside the U.S. The Fund may invest in securities of issuers located in any country outside the U.S., including developed and emerging market countries.

The Fund may hold assets in cash and cash equivalents, and at times these holdings may be significant. The Fund’s cash level at any point typically relates to the Subadviser’s individual security selection process, and therefore may vary, depending on the Subadviser’s desired security weightings.

The section titled “Summary of the Funds – AMG FQ Tax-Managed U.S. Equity Fund – Principal Risks” beginning on page 3 is revised to remove “Derivatives Risk,” “Growth Stock Risk,” “Model and Data Risk,” “Real Estate Industry Risk,” “Sector Risk” and “Tax Management Risk” as principal risks of the Fund and to add the following as principal risks of the Fund:

Currency Risk—fluctuations in exchange rates may affect the total loss or gain on a non-U.S. dollar investment when converted back to U.S. dollars and exposure to non-U.S. currencies may subject the Fund to the risk that those currencies will decline in value relative to the U.S. dollar.

Emerging Markets Risk—investments in emerging markets are subject to the general risks of foreign investments, as well as additional risks which can result in greater price volatility. Such additional risks

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include the risk that markets in emerging market countries are typically less developed and less liquid than markets in developed countries and such markets are subjected to increased economic, political, or regulatory uncertainties.

Focused Investment Risk—to the extent the Fund invests a substantial portion of its assets in a relatively small number of securities or a particular market, industry, group of industries, country, region, group of countries, asset class or sector, it generally will be subject to greater risk than a fund that invests in a more diverse investment portfolio. In addition, the value of the Fund would be more susceptible to any single economic, market, political or regulatory occurrence affecting, for example, that particular market, industry, region or sector.

Foreign Investment Risk—investments in foreign issuers involve additional risks (such as risks arising from less frequent trading, changes in political or social conditions, and less publicly available information about non-U.S. issuers) that differ from those associated with investments in U.S. issuers and may result in greater price volatility.

High Cash Balance Risk—when the Fund has a significant cash balance for a sustained period, the benefit to the Fund of any market upswing may likely be reduced, and the Fund’s performance may be adversely affected.

Liquidity Risk—the Fund may not be able to dispose of particular investments, such as illiquid securities, readily at favorable times or prices or the Fund may have to sell them at a loss.

Political Risk—changes in the general political and social environment of a country can have substantial effects on the value of investments exposed to that country.

Valuation Risk—the Fund may not be able to value its investments in a manner that accurately reflects their market values, and the Fund may not be able to sell an investment at a price equal to 0.25% per annumthe valuation ascribed to that investment by the Fund. The valuation of the Fund’s investments involves subjective judgment. Certain securities in which the Fund may invest may be more difficult to value accurately, especially during periods of market disruptions or extreme market volatility. Incorrect valuations of the Fund’s portfolio holdings could result in the Fund’s shareholder transactions being effected at an NAV that does not accurately reflect the underlying value of the Fund’s portfolio, resulting in the dilution of shareholder interests.

Also with respect to the section titled “Summary of the Funds – AMG FQ Tax-Managed U.S. Equity Fund – Principal Risks” beginning on page 3, the principal risks shall appear in the following order: Market Risk; Management Risk; Foreign Investment Risk; Focused Investment Risk; Value Stock Risk; Currency Risk; Emerging Markets Risk; High Cash Balance Risk; Large-Capitalization Stock Risk; Liquidity Risk; Political Risk; Small- and Mid-Capitalization Stock Risk; and Valuation Risk.

In the section titled “Summary of the Funds – AMG FQ Tax-Managed U.S. Equity Fund – Performance” beginning on page 4, the first paragraph is deleted and replaced with the following:

The following performance information illustrates the risks of investing in the Fund by showing changes in the Fund’s performance from year to year and by showing how the Fund’s performance compares to that of two broad-based securities market indices. As always, past performance of the Fund (before and after taxes) is not an indication of how the Fund will perform in the future.

As of May 21, 2021, Veritas was appointed as subadviser to the Fund and the Fund changed its name to “AMG Veritas Global Focus Fund,” adopted its current investment strategies and began comparing its performance to the MSCI World Index. The Fund’s performance information for periods prior to May 21, 2021 reflects the Fund’s investment strategy that was in effect at that time and may have been different had the Fund’s current investment strategy been in effect.

The performance information for the Fund’s Class N shares (formerly Investor Class shares, which were renamed Class N shares on October 1, 2016 (formerly Class A shares, which were renamed Investor Class shares on December 1, 2012)) for periods prior to December 1, 2012, does not reflect the impact of the

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front-end and deferred sales charges (loads) that were in effect until December 1, 2012. Effective October 1, 2016, outstanding Institutional Class shares of the Fund were renamed Class I shares.

To obtain updated performance information, please visit www.amgfunds.com or call 800.548.4539.

The Average Annual Total Returns table in the section titled “Summary of the Funds – AMG FQ Tax-Managed U.S. Equity Fund – Performance” beginning on page 4 is deleted and replaced with the following:

Average Annual Total Returns as of 12/31/20

The section titled “Summary of the Funds – AMG FQ Tax-Managed U.S. Equity Fund – Portfolio Management” on page 5 is deleted and replaced with the following:

PORTFOLIO MANAGEMENT

Investment Manager

AMG Funds LLC

Subadviser

Veritas Asset Management LLP

(pursuant to an interim subadvisory agreement in anticipation of shareholder approval of a definitive subadvisory agreement)

Portfolio Managers

Andrew Headley

Head of Global of Veritas;

Portfolio Manager of the Fund since May 2021.

Mike Moore

Fund Manager and Analyst of Veritas;

Portfolio Manager of the Fund since May 2021.

The section titled “Additional Information About the Funds – AMG FQ Tax-Managed U.S. Equity Fund – Additional Information About the Fund’s Principal Investment Strategies” beginning on page 15 is deleted and replaced with the following:

ADDITIONAL INFORMATION ABOUT THE FUND’S PRINCIPAL INVESTMENT STRATEGIES

The Fund generally expects to sell a particular security when the Subadviser believes the security’s intrinsic value has been achieved and there will be no subsequent price upgrade or greater opportunities exist

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elsewhere. The Fund may also consider selling a particular security in other circumstances, including if the Subadviser believes a fundamental change in the company’s outlook occurs or there is a thesis breach, for example, if there are unexplained changes in management, accounting irregularities or corporate governance issues.

The Fund’s compliance with its investment limitations and requirements described in the Prospectus is usually determined at the time of investment. If such percentage limitation is complied with at the time of an investment, any subsequent change in percentage resulting from a change in values or assets, or a change in market capitalization of a company, will not constitute a violation of that limitation.

The section titled “Additional Information About the Funds – Summary of the Funds’ Principal Risks” beginning on page 21 is revised to reflect that “Derivatives Risk,” “Growth Stock Risk,” “Model and Data Risk,” “Real Estate Industry Risk,” “Sector Risk” and “Tax Management Risk” are no longer principal risks of the Fund; to reflect that “Currency Risk,” “Emerging Markets Risk,” “Foreign Investment Risk,” “Liquidity Risk” and “Political Risk” are principal risks of the Fund; and to add the following as principal risks of the Fund:

FOCUSED INVESTMENT RISK

To the extent a Fund invests a significant portion of its assets in a relatively small number of securities, or a particular market, industry, group of industries, country, region, group of countries, asset class or sector, the Fund’s net asset value may be more volatile and the Fund may involve more risk than a fund that invests in a more diverse investment portfolio. Changes in the value of a single security or the impact of a single economic, political or regulatory occurrence may have a great adverse impact on a Fund’s net asset value.

HIGH CASH BALANCE RISK

When the Fund has a significant cash balance for a sustained period, the benefit to the Fund of any market upswing may likely be reduced, and the Fund’s performance may be adversely affected.

VALUATION RISK

The Fund may not be able to value its investments in a manner that accurately reflects their market values, and the Fund may not be able to sell an investment at a price equal to the valuation ascribed to that investment by the Fund. The valuation of the Fund’s investments involves subjective judgment and some valuations may involve assumptions, projections, opinions, discount rates, estimated data points and other uncertain or subjective amounts, all of which may prove inaccurate. In addition, the valuation of certain investments held by the Fund may involve the significant use of unobservable and non-market inputs. Certain securities in which the Fund may invest may be more difficult to value accurately, especially during periods of market disruptions or extreme market volatility. In addition, there can be no assurance that fair value pricing will result in adjustments to the prices of securities or other assets, or that fair value pricing will reflect actual market value, and it is possible that the fair value determined for a security or other asset will be materially different from quoted or published prices, from the prices used by others for the same security or other asset and/or from the value that actually could be or is realized upon the sale of that security or other asset. Technological issues or other service disruption issues involving third party service providers may also cause the Fund to value its investments incorrectly. Incorrect valuations of the Fund’s portfolio holdings could result in the Fund’s shareholder transactions being effected at an NAV that does not accurately reflect the underlying value of the Fund’s portfolio, resulting in the dilution of shareholder interests.

The first paragraph of the section titled “Additional Information About the Funds – Fund Management – AMG FQ Tax-Managed U.S. Equity Fund” beginning on page 27 is deleted and replaced with the following:

Veritas has day-to-day responsibility for managing the Fund’s portfolio pursuant to an interim Subadvisory Agreement that became effective on May 21, 2021 and will remain in effect for 150 days or until shareholders of the Fund approve a definitive Subadvisory Agreement with Veritas, if earlier. Veritas is located at 1 Smart’s Place, London WC2B 5LW. As of December 31, 2020, Veritas had assets under management of approximately $33 billion. AMG indirectly owns a majority interest in Veritas.

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Andrew Headley and Mike Moore are the portfolio managers jointly and primarily responsible for the day-to-day management of the Fund, and have managed the Fund since May 2021. Mr. Headley is Head of Global, Co-Fund Manager of the Veritas global strategies and a Managing Partner of Veritas. He has 25 years’ investment experience. Prior to joining Veritas in 2003, he was an Analyst and Portfolio Manager at WP Stewart from 2001 to 2003 and at Newton Investment Management from 1996 to 2001. Mr. Headley also worked as a Tax Consultant at Price Waterhouse from 1993 to 1996. Mr. Moore is Alternate Fund Manager for Veritas’ Global strategy (with the exception of the Veritas Global Equity Income Fund) and Analyst specializing in Technology, who joined Veritas in 2014. Previously, he was a Global Analyst at M&G Investments from 2005 to 2014 and held a prior role at Barclays Wealth Management.

In addition, effective if and when the New Subadvisory Agreement takes effect, the Prospectus is amended as follows:

The sections under “Summary of the Funds – AMG FQ Tax-Managed U.S. Equity Fund” titled “Fees and Expenses of the Fund” and “Expense Example” on page 3 are deleted and replaced with the following:

FEES AND EXPENSES OF THE FUND

The table below describes the fees and expenses that you may pay if you buy, hold and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.

Annual Fund Operating Expenses

(expenses that you pay each year as a percentage of the value of your investment)

EXPENSE EXAMPLE

This Example will help you compare the cost of investing in the Fund to the cost of investing in other mutual funds. The Example makes certain assumptions. It assumes that you invest $10,000 as an initial investment in the Fund for the time periods indicated and then redeem all of your shares at the end of those

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periods. It also assumes that your investment has a 5% total return each year and the Fund’s operating expenses remain the same. The Example includes the Fund’s contractual expense limitation through March 1, 2023. Although your actual costs may be higher or lower, based on the above assumptions, your costs would be:

The first paragraph of the section titled “Additional Information About the Funds – AMG FQ Tax-Managed U.S. Equity Fund – Additional Information About the Fund’s Expenses and Performance” is deleted and replaced with the following:

As discussed under “Fees and Expenses of the Fund” in the Fund’s summary section, the Investment Manager has contractually agreed, through at least March 1, 2023, to waive management fees and/or pay or reimburse the Fund’s expenses in order to limit Total Annual Fund Operating Expenses After Fee Waiver and Expense Reimbursements (exclusive of taxes, interest (including interest incurred in connection with bank and custody overdrafts and in connection with securities sold short), shareholder servicing fees, distribution and service (12b-1) fees, brokerage commissions and other transaction costs, dividends payable with respect to securities sold short, acquired fund fees and expenses, and extraordinary expenses) of the Fund to the annual rate of 0.88% of the Fund’s average daily net assets (this annual rate or such other annual rate that may be in effect from time to time, the “Expense Cap”), subject to later reimbursement by the Fund in certain circumstances. In general, for a period of up to 36 months after the date any amounts are paid, waived or reimbursed by the Investment Manager, the Investment Manager may recover such amounts from the Fund, provided that such repayment would not cause the Fund’s Total Annual Fund Operating Expenses After Fee Waiver and Expense Reimbursements (exclusive of the items noted in the parenthetical above) to exceed either (i) the Expense Cap in effect at the time such amounts were paid, waived or reimbursed, or (ii) the Expense Cap in effect at the time of such repayment by the Fund. The contractual expense limitation may only be terminated in the event the Investment Manager or a successor ceases to be the investment manager of the Fund or a successor fund, by mutual agreement between the Investment Manager and the AMG Funds I Board of Trustees or in the event of the Fund’s liquidation unless the Fund is reorganized or is a party to a merger in which the surviving entity is successor to the accounting and performance information of the Fund. The Fund’s annual operating expenses may vary throughout the period and from year to year. The Fund’s expenses for the current fiscal year may be different than the expenses listed in the Fund’s fee and expense table above.

The first paragraph of the section titled “Additional Information About the Funds – Fund Management – AMG FQ Tax-Managed U.S. Equity Fund” beginning on page 27 is deleted and replaced with the following:

The Fund is obligated by its Investment Management Agreement to pay an annual management fee to the Investment Manager of 0.67% of the average daily net assets of the Fund. Such fee shall be accrued daily and paid as soon as practical after the last day of each calendar month.

The Subadviser may voluntarily waive all orInvestment Manager, in turn, pays a portion of this fee to Veritas for its services as Subadviser. Under a separate Administration Agreement with the Subadvisory fee payable from time to time hereunder. The Adviser agrees that, during any period in whichFund, the Subadvisor has voluntarily waived all orInvestment Manager provides a portionvariety of the Subadvisory fee hereunder, if requested by the Subadvisor, the Adviser will waive an equal amount (or such lesser amount as the Subadvisor may request) of the advisory fee payable by the Trust to the Adviser with respectadministrative services to the Fund and receives an annual administrative fee from the Fund for these services of 0.15% of the Fund’s average daily net assets.

PLEASE KEEP THIS SUPPLEMENT FOR FUTURE REFERENCE

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Filed pursuant to 497(e)

File Nos. 033-44909 and 811-06520

AMG FUNDS I

AMG FQ Tax-Managed U.S. Equity Fund

Supplement dated March 19, 2021 to the Prospectus, dated February 1, 2021

The following information supplements and supersedes any information to the contrary relating toAMG FQ Tax-Managed U.S. Equity Fund (the “Fund”), a series of AMG Funds I (the “Trust”), contained in the Fund’s Prospectus (the “Prospectus”), dated as noted above.

IMPORTANT NOTICE REGARDING CHANGE IN INVESTMENT POLICY

Effective as of May 21, 2021, the Fund’s policy to, under normal circumstances, invest at least 80% of its net assets, plus the amount of any borrowings for investment purposes, in equity securities of issuers located in the U.S. will be removed.

PLEASE KEEP THIS SUPPLEMENT FOR FUTURE REFERENCE

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APPENDIX C

PAST PERFORMANCE OF VERITAS IN SIMILAR ACCOUNTS (GLOBAL FOCUS EQUITY COMPOSITE)

The bar chart and table below set forth the investment performance for the periods indicated of all discretionary fee paying portfolios (the “Accounts”) with investment objectives, policies and strategies substantially similar to those of AMG Veritas Global Focus Fund, managed by Veritas (the “Composite” or the “Veritas Global Focus Equity Composite”). Portfolios will hold less than 25% cash before initial inclusion in the Composite. The performance information shows changes in the Composite’s performance from year to year and how the Composite’s performance compares over the same periods to the performance of the Fund’s benchmark, the MSCI World Index. Performance of the Composite has been adjusted to give effect on a monthly basis to the maximum management fee for a pooled fund in the Composite, 1.5% per annum, which is higher than the Fund’s Class N fees and expenses. The Composite was created in May 2016, with performance history dating to July 31, 2001.

The table illustrates how the performance of the Composite has varied since the inception of the Composite’s performance history. Composite performance does not reflect reinvestment of dividend and capital gain distributions. The investment results of the Composite presented below are unaudited. Unlike AMG Veritas Global Focus Fund, none of the Accounts are subject to certain investment limitations, diversification requirements and other restrictions imposed by the 1940 Act and the Internal Revenue Code. Consequently, the performance results for the Composite could have been adversely affected if all of the accounts included in the Composite had been regulated as investment companies under the Advisory Agreement.federal securities laws. Veritas has calculated returns for the Composite based on Global Investment Performance Standards (GIPS), not in the manner required for mutual funds by the SEC.

The Subadviser agrees that, during any periodperformance shown below is provided solely to illustrate Veritas’ performance in whichmanaging the Adviser has waived all or a portionAccounts, is not the performance of AMG Veritas Global Focus Fund, and is not indicative of the advisory fee payableFund’s future performance. Had the Fund been in operation and/or managed by Veritas during all periods for which Composite performance information is shown, the Fund’s performance may have differed due to factors such as investment limitations, diversification requirements and other restrictions imposed by the Trust to1940 Act and the Adviser under the Advisory Agreement with respect to the Fund, if requested by the Adviser, the Subadvisor will waive a pro rata share (or such lesser share as the Adviser may request) of the Subadvisory fee payable hereunder with respect to the Fund, such that the amount waived by the Subadvisor shall bear the same ratio to the total amount of the subadvisory fees payable hereunder with respect to the Fund as the amount waived by the Adviser bears to all fees payable to the Adviser under the Advisory Agreement with respect to the Fund.

The Adviser agrees that,Internal Revenue Code, differences in addition to any amounts otherwise payable to the Subadvisor with respect to the Fund hereunder, the Adviser shall pay the Subadvisor all amounts previously waived by the Subadvisor to the extent that such amounts are subsequently paid by the Trust to the Adviser under the Advisory Agreement, it being further agreed that, with respect to any such amounts subsequently paid by the Trust to the Adviser, the amount paid by the Adviser to the Subadviser shall bear the same ratio to the total amount of the fees paid by the Trust as the total amount previously waived by the Subadvisor bears to the total amount of the fees previously waived by the Adviser under the Advisory Agreement with respect to the Fund.

The Subadvisor agrees that, during any period in which the Adviser has agreed to pay or reimburse the Trust for expensescash flows into and out of the Fund, if requested by the Adviser, the Subadvisor shall pay or reimburse the Trust for the entire amount of all suchdifferences in fees and expenses, and differences in portfolio size and investments. Prior performance of the Fund (or such lesser amount asAccounts is not indicative of future rates of return and is no indication of future performance of the Adviser may request). The Adviser agrees that, in additionFund. As noted above, performance of the Composite has been adjusted to any amounts otherwise payablegive effect on a monthly basis to the Subadvisor with respect tomaximum management fee for a pooled fund in the Fund hereunder, the Adviser shall pay the Subadvisor all amounts previously paid or reimbursed by the Subadvisor to the extent that such amounts are subsequently paid by the Trust to the Adviser under the Advisory Agreement.Composite, 1.5% per annum.

Calendar Year Total Returns as of 12/31/2020

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Average Annual Total Returns as of 12/31/2020

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INSTRUCTIONS FOR EXECUTING PROXY CARD

The following general rules for signing proxy cards may be of assistance to you and may help to avoid the time and expense involved in validating your vote if you fail to sign your proxy card properly.

AMG FUNDS I

AMG FQ TAX-MANAGED U.S. EQUITY FUND

PROXY FOR A SPECIAL MEETING OF SHAREHOLDERS TO BE HELD ON JUNE 17, 2021

The undersigned, revoking all previous proxies, if any, with respect to the Shares (defined below), hereby appoints Thomas G. Disbrow, Mark J. Duggan and Maureen A. Meredith proxies, each with full power of substitution, to vote at the Special Meeting of Shareholders and at any adjournments or postponements thereof (the “Meeting”) of AMG FQ Tax-Managed U.S. Equity Fund (the “Fund”) (the shares of beneficial interest of the Fund, the “Shares”) to be held on June 17, 2021 at 11:00 a.m. Eastern Time, or at any adjournments or postponements thereof, upon the Proposals described in the Notice of Special Meeting and accompanying Proxy Statement, which have been received by the undersigned. In light of the COVID-19 pandemic, the Meeting will be a virtual meeting held via telephone only.

If you wish to attend the Meeting, please register by sending an email to attendameeting@astfinancial.com and provide us with your full name and address in order to receive the conference call dial-in information. Please use the email subject line “AMG FQ TAX-MANAGED U.S. EQUITY FUND”, and include in your email your full name along with your request for the conference line number. That number will be sent to you, allowing you to call into the Meeting. We encourage you to vote your shares prior to the Meeting.

Do you have questions? If you have any questions about how to vote your proxy or about the meeting in general, please call toll-free (866) 406-2283. Representatives are available to assist you Monday through Friday 9 a.m. to 11 p.m. Eastern Time.

Important Notice Regarding the Availability of Proxy Materials for the Meeting: The Notice of Special Meeting and Proxy Statement are available at https://vote.proxyonline.com/AMG/docs/FQTMUSEquity.pdf

PROXY CARDAMG FQ TAX-MANAGED U.S. EQUITY FUND

 

NOTE: PLEASE SIGN EXACTLY AS YOUR NAME(S) APPEAR ON THIS PROXY. If joint owners, EITHER may sign this Proxy. When signing as attorney, executor, administrator, trustee, guardian, or custodian for a minor, please give your full title. When signing on behalf of a corporation or as a partner for a partnership, please give the full corporate or partnership name and your title, if any.

SIGN,
SIGNATURE (AND TITLE IF APPLICABLE)		DATE ANDVOTE ON THE REVERSE SIDE
SIGNATURE (IF HELD JOINTLY)		DATE

This proxy is solicited on behalf of the Board of Trustees of AMG Funds I (the “Trust”), and may be revoked prior to its exercise by filing with the Secretary of the Trust an instrument revoking this proxy or a duly executed proxy bearing a later date, or by attending and voting at the Meeting.

After careful consideration, the Trust’s Board of Trustees unanimously recommends that shareholders vote “FOR” each proposal.

THIS PROXY WILL, WHEN PROPERLY EXECUTED, BE VOTED AS DIRECTED HEREIN BY THE SIGNING SHAREHOLDER(S). IF NO CONTRARY DIRECTION IS GIVEN WHEN THE DULY EXECUTED PROXY IS RETURNED, THIS PROXY WILL BE VOTED “FOR” THE FOLLOWING PROPOSALS AND WILL BE VOTED IN THE APPOINTED PROXIES’ DISCRETION UPON SUCH OTHER BUSINESS AS MAY PROPERLY COME BEFORE THE MEETING OR ANY ADJOURNMENT(S) OR POSTPONEMENT(S) THEREOF.

TO VOTE, MARK ONE CIRCLE IN BLUE OR BLACK INK. Example:    🌑

 

PROPOSALS:

PROXY VOTING OPTIONS FOR

AGAINST

1.MAIL your signed and voted proxy back in thepostage paid envelope provided

2.ONLINE atproxyonline.com using your proxy voting number found below

3.PHONE dial toll-free(888) 227-9349to reach an automated touchtone voting line

4.LIVE with alive operator when you call toll-free (877) 732-3621Monday through Friday 9 a.m. to 10 p.m. Eastern time

ABSTAIN

CONTROLNUMBER

1.

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To approve a new subadvisory agreement between AMG Funds LLC (the “Investment Manager”) and Veritas Asset Management LLP (“Veritas”) with respect to the Fund.

o

o

o

PROXY IN CONNECTION WITH THE SPECIAL MEETING OF SHAREHOLDERS

TO BE HELD ON May 4, 2015

The undersigned hereby appoints Donald S. Rumery and Keitha L. Kinne and each or either of them, as proxies for the undersigned, with full power of substitution and revocation to represent the undersigned and to vote on behalf of the undersigned all shares of AMG GW&K Core Bond Fund (formerly AMG Managers Total Return Bond Fund) (the “Fund”) which the undersigned is entitled to vote at the Special Meeting of Shareholders of the Fund to be held at the offices of AMG Funds LLC at 800 Connecticut Avenue, Norwalk, Connecticut 06854, on May 4, 2015 at 2:00 p.m., Eastern Time and at any adjournments or postponements thereof (the “Meeting”). The undersigned hereby acknowledges receipt of the Notice of Meeting and accompanying proxy statement and hereby instructs said attorneys and proxies to vote said shares as indicated hereon. In their discretion, the proxies are authorized to vote upon such other business as may properly come before the Meeting and any adjournments or postponements thereof. A majority of the proxies present and acting at the Meeting in person or by substitute (or, if only one shall be so present, then that one) shall have and may exercise all of the power and authority of said proxies hereunder. The undersigned hereby revokes any proxy previously given.

THIS PROXY IS SOLICITED ON BEHALF OF THE BOARD OF TRUSTEES OF AMG FUNDS I.

IF THIS PROXY IS PROPERLY EXECUTED, THE VOTES ENTITLED TO BE CAST BY THE UNDERSIGNED WILL BE CAST IN THE MANNER DIRECTED ON THE REVERSE SIDE HEREOF, AND WILL BE VOTED IN THE DISCRETION OF THE PROXY HOLDER(S) ON ANY OTHER MATTERS THAT MAY PROPERLY COME BEFORE THE MEETING OR ANY ADJOURNMENT(S) OR POSTPONEMENT(S) THEREOF. IF THIS PROXY IS PROPERLY EXECUTED BUT NO DIRECTION IS MADE AS REGARDS TO A PROPOSAL INCLUDED IN THE PROXY STATEMENT, SUCH VOTES ENTITLED TO BE CAST BY THE UNDERSIGNED WILL BE CAST “FOR” SUCH PROPOSAL.

Please refer to the Proxy Statement for a discussion of the proposal.

PLEASE VOTE, DATE AND SIGN ON THE REVERSE SIDE HEREOF AND RETURN THE SIGNED PROXY PROMPTLY IN THE ENCLOSED ENVELOPE.

Important Notice Regarding the Availability of Proxy Materials for the Special Meeting to be held on May 4, 2015:

The Notice of Special Meeting and the Proxy Statement/Prospectus are available atwww.proxyonline.com/docs/amgfunds.pdf

TO VOTE, MARK ONE CIRCLE IN BLUE OR BLACK INK. Example:—

The Board of Trustees recommends a vote “FOR” the following:

You can vote on the internet, by telephone or by mail. Please see the reverse side for instructions.

PLEASE VOTE ALL YOUR BALLOTS IF YOU RECEIVED MORE THAN ONE BALLOT DUE TO MULTIPLE INVESTMENTS IN THE FUND. REMEMBER TO SIGN AND DATE ABOVE BEFORE MAILING IN YOUR VOTE. THIS PROXY CARD IS VALID ONLY WHEN SIGNED AND DATED.

THANK YOU FOR VOTING

THANK YOU FOR YOUR CONSIDERATION.

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