UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-K

(Mark One)

For the fiscal year ended December 31, 20202021

or

For the transition period from                     to                     

333-189017-11

(Commission File Number of issuing entity)

0001651588

(Central Index Key Number of issuing entity)

Citigroup Commercial Mortgage Trust 2015-GC33

(Exact name of issuing entity as specified in its charter)

333-189017

(Commission File Number of depositor)

0001258361

(Central Index Key Number of depositor)

Citigroup Commercial Mortgage Securities Inc.

(Exact name of depositor as specified in its charter)

Citigroup Global Markets Realty Corp.

(Central Index Key Number: 0001541001)

Goldman Sachs Mortgage Company

(Central Index Key Number: 0001541502)

LMF Commercial, LLC (f/k/a Rialto Mortgage Finance, LLC)

(Central Index Key Number: 0001592182)

KGS-Alpha Real Estate Capital Markets, LLC

(Central Index Key Number: 0001499542)

RAIT Funding, LLC

(Central Index Key Number: 0001587045)

(Exact name of sponsor as specified in its charter)

c/o Citibank, N.A.

388 Greenwich Street, 14^th Floor

New York, New York 10013

(Address of principal executive offices of issuing entity)

(212) 816-5614

Registrant’s telephone number, including area code

Securities registered pursuant to Section 12(b) of the Act:

Securities registered pursuant to Section 12(g) of the Act:  None.

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.    ☐  Yes    ☒  No

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.    ☐  Yes    ☒  No

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    ☒  Yes    ☐  No

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).

Not Applicable

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  ☐

Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report.     ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act).    ☐  Yes    ☒  No

State the aggregate market value of the voting and non-voting common equity held by non-affiliates computed by reference to the price at which the common equity was last sold, or the average bid and asked price of such common equity, as of the last business day of the registrant’s most recently completed second fiscal quarter.

Not Applicable

Indicate by check mark whether the registrant has filed all documents and reports required to be filed by Section 12, 13 or 15(d) of the Securities Exchange Act of 1934 subsequent to the distribution of securities under a plan confirmed by a court.

Not Applicable

Indicate the number of shares outstanding of each of the registrant’s classes of common stock, as of the latest practicable date.

Not Applicable

DOCUMENTS INCORPORATED BY REFERENCE

List hereunder the following documents if incorporated by reference and the Part of the Form 10-K (e.g., Part I, Part II, etc.) into which the document is incorporated: (1) Any annual report to security holders; (2) Any proxy or information statement; and (3) Any prospectus filed pursuant to Rule 424(b) or (c) under the Securities Act of 1933. The listed documents should be clearly described for identification purposes (e.g., annual report to security holders for fiscal year ended December 24, 1980).

Not Applicable

PART I

Item 1. Business.

Omitted.

Item 1A. Risk Factors.

Omitted.

Item 1B. Unresolved Staff Comments.

None.

Item 2. Properties.

Omitted.

Item 3. Legal Proceedings.

Omitted.

Item 4. Mine Safety Disclosures.

Not applicable.

PART II

Item 5. Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities.

Omitted.

Item 6. Selected Financial Data.[Reserved]

Omitted.

Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations.

Omitted.

Item 7A. Quantitative and Qualitative Disclosures About Market Risk.

Omitted.

Item 8. Financial Statements and Supplementary Data.

Omitted.

Item 9. Changes in and Disagreements With Accountants on Accounting and Financial Disclosure.

Omitted.

Item 9A. Controls and Procedures.

Omitted.

Item 9B.Other Information.

None.

Item 9C. Disclosure Regarding Foreign Jurisdictions that Prevent Inspections.

Not Applicable.

PART III

Item 10. Directors, Executive Officers and Corporate Governance.

Omitted.

Item 11. Executive Compensation.

Omitted.

Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters.

Omitted.

Item 13. Certain Relationships and Related Transactions, and Director Independence.

Omitted.

Item 14. Principal Accountant Fees and Services.

Omitted.

ADDITIONAL DISCLOSURE ITEMS REQUIRED BY GENERAL INSTRUCTION J(2)

Item 1112(b) of Regulation AB

Each of (i) the portfolio of properties securing the Illinois Center mortgage loan and (ii) the portfolio of properties securing the Hammons Hotel Portfolio mortgage loan constitutes a significant obligor within the meaning of Item 1101(k)(2) of Regulation AB and as disclosed in the prospectus supplement for Citigroup Commercial Mortgage Trust 2015-GC33 filed on September 29, 2015.

With respect to the portfolio of properties securing the Illinois Center mortgage loan, the most recent unaudited net operating income was $21,220,632.40$18,222,213.69 from January 1, 20202021 through December 31, 2020.2021.

With respect to the portfolio of properties securing the Hammons Hotel Portfolio mortgage loan, the most recent unaudited net operating income was $4,591,107.00$17,754,995.25 from January 1, 20202021 through December 31, 2020.2021.

Item 1114(b)(2) and Item 1115(b) of Regulation AB

No entity or group of affiliated entities provides any external credit enhancement, uses any derivative instruments or other support for the certificates within this transaction.

Item 1117 of Regulation AB

Disclosure from Deutsche Bank Trust Company Americas, as Trustee:

Deutsche Bank Trust Company Americas (“DBTCA”) and Deutsche Bank National Trust Company (“DBNTC”) have been sued by investors in civil litigation concerning their role as trustees of certain residential mortgage-backed securities (“RMBS”) trusts.

On June 18, 2014, a group of investors, including funds managed by Blackrock Advisors, LLC, PIMCO-Advisors, L.P., and others, filed an action against DBNTC and DBTCA in New York State Supreme Court alleging that DBNTC and DBTCA failed to perform purported duties, as trustees for 544 private-label RMBS trusts, to enforce breaches of representations and warranties as to mortgage loans held by the trusts and to enforce breaches by servicers of their mortgage loan servicing obligations for the trusts.  During the course of the litigation, plaintiffs dismissed the case from New York State Supreme Court and refiled two separate cases, one in the U.S. District Court for the Southern District of New York (the “BlackRock “BlackRock SDNY Case”) and the other in the Superior Court of California,

Orange County (the “BlackRock “BlackRock California Case”).  Pursuant to a settlement among the parties, the BlackRock SDNY Case was dismissed on December 6, 2018, and the BlackRock California Case was dismissed on January 11, 2019.

On September 27, 2017, DBTCA was added as a defendant to a case brought by certain special purpose entities including Phoenix Light SF Limited in the U.S. District Court for the Southern District of New York, in which the plaintiffs previously alleged incorrectly that DBNTC served as trustee for all 43 of the trusts at issue.  On September 27, 2017, plaintiffs filed a third amended complaint that names DBTCA as a defendant in addition to DBNTC.  DBTCA serves as trustee for one of the 43 trusts at issue.  DBNTC serves as trustee for the other 42 trusts at issue.  Plaintiffs’ third amended complaint brings claims for violation of the U.S. Trust Indenture Act of 1939 (“TIA”); breach of contract; breach of fiduciary duty; negligence and gross negligence; violation of the New York’sYork Streit Act;Act (“Streit Act”); and breach of the covenant of good faith.  However, in the third amended complaint, plaintiffs acknowledge that, before DBTCA was added to the case, the court dismissed plaintiffs’ TIA Act claims, negligence and gross negligence claims, Streit Act claims, claims for breach of the covenant of good faith, and certain theories of plaintiffs’ breach of contract claims, and plaintiffs only include these claims to preserve any rights on appeal.  Plaintiffs allege damages of “hundreds of millions of dollars.”  On November 13, 2017, DBNTC and DBTCA filed an answer to the third amended complaint.  On December 7, 2018, DBNTC and DBTCA filed a motion for summary judgment.  Also on December 7, 2018, plaintiffs, jointly with Commerzbank AG (see(see description of Commerzbank case below), filed a motion for partial summary judgment.  As of March 1,On October 27, 2021, both motionsDBNTC and DBTCA filed a supplemental motion for summary judgment have been briefedrelating to plaintiffs’ standing.  On February 8, 2022, the court issued an order in which it granted DBNTC and are awaiting decision byDBTCA’s supplemental motion for summary judgment, granted in part DBNTC and DBTCA’s initial motion for summary judgment, and denied plaintiffs’ motion for partial summary judgment.  As a result of that order, all of plaintiffs’ claims were dismissed with prejudice.  On March 10, 2022, plaintiffs filed a notice of appeal to the court.United States Court of Appeals for the Second Circuit with respect to the court’s orders on the motions to dismiss and for summary judgment.

On November 30, 2017, DBTCA was added as a defendant to a case brought by Commerzbank AG (“Commerzbank”) in the U.S. District Court for the Southern District of New York, in which Commerzbank previously alleged incorrectly that DBNTC served as trustee for all 50 of the trusts at issue.  On November 30, 2017, Commerzbank filed a second amended complaint that names DBTCA as a defendant in addition to DBNTC.  DBTCA serves as trustee for 1 of the 50 trusts at issue.  DBNTC serves as trustee for the other 49 trusts at issue.  Commerzbank’s second amended complaint brings claims for violation of the TIA; breach of contract; breach of fiduciary duty; negligence; violation of the Streit Act; and breach of the covenant of good faith.  However, in the second amended complaint, Commerzbank acknowledges that, before DBTCA was added to the case, the court dismissed Commerzbank’s TIA claims for the trusts governed by pooling and servicing agreements, as well as its Streit Act claims and claims for breach of the covenant of good faith, and Commerzbank only includes these claims to preserve any rights on appeal.  The second amended complaint alleges that DBNTC and DBTCA caused Commerzbank to suffer “hundreds of millions of dollars in losses,” but the complaint does not include a demand for money damages in a sum certain.  On January 29, 2018, DBNTC and DBTCA filed an answer to the second amended complaint.  On December 7, 2018, DBNTC and DBTCA filed a motion for summary judgment.  Also on December 7, 2018, Commerzbank, jointly with the Phoenix Light plaintiffs, filed a motion for partial summary judgment.  As of March 1, 2021, both motionsOn February 8, 2022, the court issued an order in which it granted in part DBNTC and DBTCA’s motion for summary judgment have been briefed and are awaiting decision by the court.denied plaintiffs’ motion for partial summary judgment.  As a result of that order, many of plaintiffs’ claims and theories were dismissed with prejudice.  Discovery is ongoing.

On December 30, 2015, IKB International, S.A. in Liquidation and IKB Deutsche Industriebank A.G. (collectively, “IKB”), as an investor in 37 RMBS trusts, filed a summons with notice in the Supreme Court of the State of New York, New York County, against DBNTC and DBTCA as trustees of the trusts. On May 27, 2016, IKB served its complaint asserting claims for breach of contract, breach of fiduciary duty, breach of duty to avoid conflicts of interest, violation of the Streit Act, violation of the TIA, violation of Regulation AB, and violation of Section 9 of the Uniform Commercial Code. IKB alleges that DBNTC and DBTCA are liable for over U.S. $268 million in damages. On October 5, 2016, DBNTC and DBTCA, together with several other trustees defending lawsuits by IKB, filed a joint motion to dismiss. On January 6, 2017, and June 20, 2017, IKB filed a notice of discontinuance, voluntarily dismisseddismissing with prejudice all claims as to seventhree trusts. On June 20, 2017, the parties filed a stipulation, voluntarily dismissing with prejudice all claims as to four additional trusts. On January 27, 2021, the court granted in part and denied in part DBNTC and DBTCA’s motion to dismiss. The court granted the motion to dismiss with respect to IKB’s claims for violations of the Streit Act, Regulation AB, and Section 9 of the Uniform Commercial Code, as well as certain aspects of IKB’s claims for breach of contract, breach of fiduciary duty, and violation of the TIA. The court denied the remainder of the motion to dismiss. IKB’s remaining claims for breach of contract, breach of fiduciary duty, breach of duty to avoid conflicts of interest, and violation of the TIA will proceed. On May 10, 2021, DBNTC and DBTCA filed a notice of appeal with the New York Supreme Court Appellate Division, First Department, regarding certain aspects of the court’s order on the motion to dismiss.  On May 20, 2021, IKB filed a notice of cross appeal with respect to other aspects of that order. Both appeals have been fully

briefed.  On June 2, 2021, IKB filed a motion for re-argument regarding certain aspects of the court’s order on the motion to dismiss, which the court denied on August 3, 2021.  On May 13, 2021, DBNTC and DBTCA filed an answer to the complaint.  On October 28, 2021, the parties filed a stipulation, voluntarily dismissing with prejudice all claims as to seven additional trusts.  On December 29, 2021, the parties filed a stipulation, voluntarily dismissing with prejudice all claims as to one additional trust.  Discovery is ongoing.

It is DBTCA’s belief that it has no pending legal proceedings (including, based on DBTCA’s present evaluation, the litigation disclosed in the foregoing paragraphs) that would materially affect its ability to perform its duties under the related servicing agreementPooling and Servicing Agreement for this transaction.

Disclosure from Wells Fargo Bank, National Association (i) as custodian for the Somerset Park Apartments mortgage loan under the WFCM 2015-C30 PSA and (ii) as custodian for the Decoration & Design Building mortgage loan under the CGCMT 2015-P1 PSA:

Beginning on June 18,In December 2014, a group of institutional investorsPhoenix Light SF Limited and certain related entities and the National Credit Union Administration (NCUA) filed civil complaints in the Supreme Court of the State of New York, New York County, and later the U.S.United States District Court for the Southern District of New York against Wells Fargo Bank, N.A., (“alleging claims against Wells Fargo Bank”)Bank in its capacity as trustee for certaina number of residential mortgage backedmortgage-backed securities (“RMBS”) trusts. The complaints againstComplaints raising similar allegations have been filed by Commerzbank AG in the Southern District of New York and by IKB International and IKB Deutsche Industriebank in New York state court. In each case, the plaintiffs allege that Wells Fargo Bank, alleged that theas trustee, caused losses to investors, and assertedplaintiffs assert causes of action based upon, among other things, the trustee'strustee’s alleged failure to: (i)to notify and enforce repurchase obligations of mortgage loan sellers for purported breaches of representations and

warranties, (ii) notify investors of alleged events of default, and (iii) abide by appropriate standards of care following alleged events of default. Relief sought included money damages in an unspecified amount, reimbursement of expenses, and equitable relief. In November 2018, Wells Fargo Bank reached an agreement,previously settled two class action lawsuits with similar allegations that were filed in which it denied any wrongdoing, to resolve such claims on a classwide basis forNovember 2014 and December 2016 by institutional investors in the 271 RMBS trusts at issue. On May 6, 2019, theSouthern District of New York and New York state court, entered an order approving the settlement agreement. Separate lawsuits againstrespectively. In addition, Park Royal I LLC and Park Royal II LLC have filed complaints in New York state court alleging Wells Fargo Bank, making similar allegationsN.A., as trustee, failed to take appropriate actions upon learning of defective mortgage loan documentation. In March 2021, the Company entered into an agreement to resolve the case filed by certain other institutional investors concerning several RMBS trusts in New York federal and state court are not covered by the settlement agreement.

NCUA.

In addition to the foregoing cases, in August 2014 and August 2015 Nomura Credit & Capital Inc. (“Nomura”) and Natixis Real Estate Holdings, LLC (“Natixis”) filed a total of seven third-party complaints against Wells Fargo Bank in New York state court. In the underlying first-party actions, Nomura and Natixis have been sued for alleged breaches of representations and warranties made in connection with residential mortgage-backed securities sponsored by them. In the third-party actions, Nomura and Natixis allege that Wells Fargo Bank, as master servicer, primary servicer or securities administrator, failed to notify Nomura and Natixis of their own breaches, failed to properly oversee the primary servicers, and failed to adhere to accepted servicing practices. Natixis additionally alleges that Wells Fargo Bank failed to perform default oversight duties. Wells Fargo Bank has asserted counterclaims alleging that Nomura and Natixis failed to provide Wells Fargo Bank notice of their representation and warranty breaches.

With respect to each of the foregoing litigations, Wells Fargo Bank believes plaintiffs' claims are without merit and intends to contest the claims vigorously, but there can be no assurances as to the outcome of the litigations or the possible impact of the litigations on Wells Fargo Bank or the related RMBS trusts.

Item 1119 of Regulation AB

Provided previously in (i) the prospectus supplement of the Registrant relating to the issuing entity and filed on September 29, 2015 pursuant to Rule 424(b)(5) of the Securities Act of 1933, as amended and (ii) the Current Report on Form 8-K filed by the registrant on July 5, 2018 under Commission File No. 333-189017-11.

Item 1122 of Regulation AB

The reports on assessment of compliance with servicing criteria for asset-backed securities and related attestation reports are attached hereto under Item 15.

Item 1123 of Regulation AB

The servicer compliance statements are attached hereto under Item 15.

PART IV

Item 15. Exhibits and Financial Statement Schedules.

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

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