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 and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted 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 and post such files).     ☒ Yes    ☐ No

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company.  See the definitions of "large accelerated filer," "accelerated filer" and "smaller reporting 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 is a shell company (as defined in Rule 12b-2 of the Exchange Act).     ☐ Yes    ☒ No

(1)  The condensed statements included herein have been prepared by the registrant, without audit, pursuant to the rules and regulations of the Securities and Exchange Commission, and reflect all adjustments which are, in the opinion of management, necessary to a fair statement of the results of operations for the interim period, on a basis consistent with the annual audited statements.  The adjustments made to these condensed statements consist only of normal recurring adjustments.  Certain information, accounting policies, and footnote disclosures normally included in financial statements prepared in accordance with United States Generally Accepted Accounting Principles (US GAAP) have been condensed or omitted pursuant to such rules and regulations, although the registrant believes that the disclosures are adequate to make the information presented not misleading.  It is suggested that these condensed financial statements be read in conjunction with the financial statements and the summary of significant accounting policies and notes thereto included in the registrant's latest annual report on Form 10‑K.

AEI Income & Growth Fund 26 LLC ("Company"), a Limited Liability Company, was formed on March 14, 2005 to acquire and lease commercial properties to operating tenants.  The Company's operations are managed by AEI Fund Management XXI, Inc. ("AFM"), the Managing Member.  Robert P. Johnson, the President and sole director of AFM, serves as the Special Managing Member.  AFM is a wholly owned subsidiary of AEI Capital Corporation of which Mr. Johnson is the majority shareholder.  AEI Fund Management, Inc. ("AEI"), an affiliate of AFM, performs the administrative and operating functions for the Company.

The terms of the offering called for a subscription price of $10 per LLC Unit, payable on acceptance of the offer.  The Company commenced operations on April 3, 2006 when minimum subscriptions of 150,000 LLC Units ($1,500,000) were accepted.  The offering terminated October 19, 2007, when the extended offering period expired.  The Company received subscriptions for 1,832,736 Units.  Under the terms of the Operating Agreement, the Limited Members and Managing Members contributed funds of $18,327,360 and $1,000, respectively.  The Company shall continue until December 31, 2055, unless dissolved, terminated and liquidated prior to that date.

During operations, any Net Cash Flow, as defined, which the Managing Members determine to distribute will be distributed 97% to the Limited Members and 3% to the Managing Members.  Distributions to Limited Members will be made pro rata by Units.

For tax purposes, profits from operations, other than profits attributable to the sale, exchange, financing, refinancing or other disposition of property, will be allocated 97% to the Limited Members and 3% to the Managing Members.  Net losses from operations will be allocated 99% to the Limited Members and 1% to the Managing Members.

For tax purposes, profits arising from the sale, financing, or other disposition of property will be allocated in accordance with the Operating Agreement as follows: (i) first, to those Members with deficit balances in their capital accounts in an amount equal to the sum of such deficit balances; (ii) second, 99% to the Limited Members and 1% to the Managing Members until the aggregate balance in the Limited Members' capital accounts equals the sum of the Limited Members' Adjusted Capital Contributions plus an amount equal to 6.5% of their Adjusted Capital Contributions per annum, cumulative but not compounded, to the extent not previously allocated; (iii) third, the balance of any remaining gain will then be allocated 90% to the Limited Members and 10% to the Managing Members.  Losses will be allocated 99% to the Limited Members and 1% to the Managing Members.

The Managing Members are not required to currently fund a deficit capital balance.  Upon liquidation of the Company or withdrawal by a Managing Member, the Managing Members will contribute to the Company an amount equal to the lesser of the deficit balances in their capital accounts or 1.01% of the total capital contributions of the Limited Members over the amount previously contributed by the Managing Members.

On February 3,In May 2014, with subsequent updates issued in August 2015 and March, April and May 2016, the Company purchasedFinancial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2014-09 regarding ASC Topic 606, Revenue from Contracts with Customers.  This standard was developed to enable financial statement users to better understand the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers.  The update's core principle is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services.  Entities are to use a Dollar Tree storefive-step contract review model to ensure revenue is recognized, measured and disclosed in West Point, Mississippi for $1,535,714.  The Company allocated $232,977 ofaccordance with this principle.  Those steps include the purchasefollowing:  (i) identify the contract with the customer, (ii) identify the performance obligations in the contract, (iii) determine the transaction price, (iv) allocate the transaction price to Acquired Intangible Lease Assets, representing in-place lease intangibles,each performance obligation in the contract, and allocated $283,495 to Acquired Below-Market Lease Intangibles.  The Company incurred $55,479 of acquisition expenses related to(v) recognize revenue when or as the purchase that were expensed.  The property is leased to Dollar Tree Stores, Inc. underentity satisfies a lease agreement with a remaining primary term of 9.7 years (as of the date of purchase) and annual rent of $107,500.performance obligation.

The Company owns a 40% interest in the Sports Authority store in Wichita, Kansas.  On March 2, 2016, the tenant, TSA Stores, Inc., and its parent company, The Sports Authority, Inc., the guarantor of the lease, filed for Chapter 11 bankruptcy reorganization.  In June 2016, the tenant filed a motion with the bankruptcy court to reject the lease for this store effective June 30, 2016, at which time the tenant returned possession of the property to the owners.  As of September 30, 2017,March 31, 2018, the tenant owed $19,366 of past due rent, which was not accrued for financial reporting purposes.  The owners listed the property for lease with a real estate broker in the Wichita area.  While the property is vacant, the Company is responsible for its 40% share of real estate taxes and other costs associated with maintaining the property.  The annual rent from this property represented approximately 19%

On September 21, 2017, the Company entered into a lease agreement with a primary term of 10 years with Biomat USA, Inc. ("Biomat") as a replacement tenant for 28% of the square footage of the property.  The tenant will operate a Biomat USA Plasma Center in the space.  Biomat may terminate the lease within 90 days if it is unable to obtain governmental approvals and building permits.  The Company's 40% share of annual rent is $37,071 and is expected to commence on June 18, 2018.  Biomat has agreed to pay for the costs to divide the building into two separate spaces, the costs of tenant improvements to remodel the Biomat space and 28% of the cost to replace the roof.  The Company will be responsible for paying its 40% share of the remaining cost to replace the roof, which is expected to be approximately $113,000.  As part of the lease transaction,At December 31, 2017, the Company will payaccrued its 40% share of lease commissions due to real estate brokers totaling $54,294$54,293 that were owed as part of the lease transaction.  This amount was capitalized and will be capitalized and amortized over the term of the lease.  The Company is continuing to pursue additional tenants for the remaining space.

On March 31, 2017, the lease term expiredended for the Starbucks store in Bluffton, Indiana.  Effective April 1, 2017, the Company entered into a lease agreement with a primary term of six years with The Cellular Connection LLC, a cell phone retailer that was subleasing the property from Starbucks Corporation.  The tenant is scheduled to pay annual rent of $39,156 during the base lease term.  As part of the lease transaction, the Company paid a tenant improvement allowance of $30,000 that was capitalized and will be depreciated.

AEI Fund Management, Inc. performs the administrative and operating functions for the Company.  The payable to AEI Fund Management represents the balance due for those services.  This balance is non-interest bearing and unsecured and is to be paid in the normal course of business.

For the ninethree months ended September 30,March 31, 2018 and 2017, and 2016, the Company declared distributions of $509,894$170,104 and $639,767,$170,103, respectively.  The Limited Members received distributions of $495,001$165,001 and $622,999$165,000 and the Managing Members received distributions of $14,893$5,103 and $16,768$5,103 for the periods, respectively.  The Limited Members' distributions represented $0.28$0.09 and $0.36$0.09 per LLC Unit outstanding using 1,740,0061,738,006 and 1,747,6181,744,006 weighted average Units in 20172018 and 2016,2017, respectively.  The distributions represented $0.08 and $0.09$0.03 per Unit of Net Income and $0.20 and $0.27$0.06 per Unit of return of contributed capital in 2017 and 2016, respectively.for both years.

As of September 30, 2017March 31, 2018 and December 31, 2016,2017, the Company had no assets or liabilities measured at fair value on a recurring basis or nonrecurring basis.

This section contains "forward-looking statements" which represent management's expectations or beliefs concerning future events, including statements regarding anticipated application of cash, expected returns from rental income, growth in revenue, the sufficiency of cash to meet operating expenses, rates of distribution, and other matters.  These, and other forward-looking statements, should be evaluated in the context of a number of factors that may affect the Company's financial condition and results of operations, including the following:

The Company's financial statements have been prepared in accordance with US GAAP.  Preparing the financial statements requires management to use judgment in the application of these accounting policies, including making estimates and assumptions.  These judgments will affect the reported amounts of the Company's assets and liabilities and the disclosure of contingent assets and liabilities as of the dates of the financial statements and will affect the reported amounts of revenue and expenses during the reporting periods.  It is possible that the carrying amount of the Company's assets and liabilities, or the results of reported operations, will be affected if management's estimates or assumptions prove inaccurate.

Management of the Company evaluates the following accounting estimates on an ongoing basis, and has discussed the development and selection of these estimates and the management discussion and analysis disclosures regarding them with the managing member of the Company.

Upon acquisition of real properties, the Company records them in the financial statements at cost.  The purchase price is allocated to tangible assets, consisting of land and building, and to identified intangible assets and liabilities, which may include the value of above market and below market leases and the value of in-place leases.  The allocation of the purchase price is based upon the fair value of each component of the property.  Although independent appraisals may be used to assist in the determination of fair value, in many cases these values will be based upon management's assessment of each property, the selling prices of comparable properties and the discounted value of cash flows from the asset.

The fair values of above market and below market in-place leases will be recorded based on the present value (using an interest rate which reflects the risks associated with the leases acquired) of the difference between (i) the contractual amounts to be paid pursuant to the in-place leases and (ii) an estimate of fair market lease rates for the corresponding in-place leases measured over a period equal to the non-cancelable term of the lease including any bargain renewal periods.  The above market and below market lease values will be capitalized as intangible lease assets or liabilities.  Above market lease values will be amortized as an adjustment of rental income over the remaining term of the respective leases.  Below market lease values will be amortized as an adjustment of rental income over the remaining term of the respective leases, including any bargain renewal periods.  If a lease were to be terminated prior to its stated expiration, all unamortized amounts of above market and below market in-place lease values relating to that lease would be recorded as an adjustment to rental income.

The fair values of in-place leases will include estimated direct costs associated with obtaining a new tenant, and opportunity costs associated with lost rentals which are avoided by acquiring an in-place lease.  Direct costs associated with obtaining a new tenant may include commissions, tenant improvements, and other direct costs and are estimated, in part, by management's consideration of current market costs to execute a similar lease.  These direct costs will be included in intangible lease assets on the balance sheet and will be amortized to expense over the remaining term of the respective leases.  The value of opportunity costs will be calculated using the contractual amounts to be paid pursuant to the in-place leases over a market absorption period for a similar lease.  These intangibles will be included in intangible lease assets on the balance sheet and will be amortized to expense over the remaining term of the respective leases.  If a lease were to be terminated prior to its stated expiration, all unamortized amounts of in-place lease assets relating to that lease would be expensed.

The determination of the fair values of the assets and liabilities acquired will require the use of significant assumptions with regard to the current market rental rates, rental growth rates, discount and capitalization rates, interest rates and other variables.  If management's estimates or assumptions prove inaccurate, the result would be an inaccurate allocation of purchase price, which could impact the amount of reported net income.

Properties are carried at original cost, less accumulated depreciation and amortization. The Company tests long-lived assets for recoverability when events or changes in circumstances indicate that the carrying value may not be recoverable.  For properties the Company will hold and operate, management determines whether impairment has occurred by comparing the property's probability-weighted future undiscounted cash flows to its current carrying value.  For properties held for sale, management determines whether impairment has occurred by comparing the property's estimated fair value less cost to sell to its current carrying value.  If the carrying value is greater than the net realizable value, an impairment loss is recorded to reduce the carrying value of the property to its net realizable value.  Changes in these assumptions or analysis may cause material changes in the carrying value of the properties.

AEI Fund Management, Inc. allocates expenses to each of the funds they manage primarily on the basis of the number of hours devoted by their employees to each fund's affairs.  They also allocate expenses at the end of each month that are not directly related to a fund's operations based upon the number of investors in the fund and the fund's capitalization relative to other funds they manage.  The Company reimburses these expenses subject to detailed limitations contained in the Operating Agreement.

For the ninethree months ended September 30,March 31, 2018 and 2017, and 2016, the Company recognized rental income of $711,183$235,262 and $807,033,$245,117, respectively.  In 2017,2018, rental income decreased due to leasing a property to a new tenant at a lower annual rent and rent thatrent.  This decrease was not received from the tenant of the Sports Authority store, as discussed below.  These decreases were partially offset by additional rent received from one property acquisition in 2016 and rent increases on two properties.  Based on the scheduled rent for the properties as of October 31, 2017,April 30, 2018, the Company expects to recognize rental income of approximately $944,000 and $941,000$961,000 in 2017 and 2018, respectively.2018.

For the ninethree months ended September 30,March 31, 2018 and 2017, and 2016, the Company incurred LLC administration expenses from affiliated parties of $109,788$35,694 and $115,853,$38,647, respectively.  These administration expenses include costs associated with the management of the properties, processing distributions, reporting requirements and communicating with the Limited Members.  During the same periods, the Company incurred LLC administration and property management expenses from unrelated parties of $81,287$25,454 and $80,813,$33,687, respectively.  These expenses represent direct payments to third parties for legal and filing fees, direct administrative costs, outside audit costs, taxes, insurance and other property costs.

The Company owns a 40% interest in the Sports Authority store in Wichita, Kansas.  On March 2, 2016, the tenant, TSA Stores, Inc., and its parent company, The Sports Authority, Inc., the guarantor of the lease, filed for Chapter 11 bankruptcy reorganization.  In June 2016, the tenant filed a motion with the bankruptcy court to reject the lease for this store effective June 30, 2016, at which time the tenant returned possession of the property to the owners.  As of September 30, 2017,March 31, 2018, the tenant owed $19,366 of past due rent, which was not accrued for financial reporting purposes.  The owners listed the property for lease with a real estate broker in the Wichita area.  While the property is vacant, the Company is responsible for its 40% share of real estate taxes and other costs associated with maintaining the property.  The annual rent from this property represented approximately 19% of the total annual rent of the Company's property portfolio.  The loss of rent and increased expenses related to this property decreased the Company's cash flow.  Consequently, beginning with the third quarter of 2016, the Company reduced its regular quarterly cash distribution rate from $0.1313 per Unit to $0.0946 per Unit.

On September 21, 2017, the Company entered into a lease agreement with a primary term of 10 years with Biomat USA, Inc. ("Biomat") as a replacement tenant for 28% of the square footage of the property.  The tenant will operate a Biomat USA Plasma Center in the space.  Biomat may terminate the lease within 90 days if it is unable to obtain governmental approvals and building permits.  The Company's 40% share of annual rent is $37,071 and is expected to commence on June 18, 2018.  Biomat has agreed to pay for the costs to divide the building into two separate spaces, the costs of tenant improvements to remodel the Biomat space and 28% of the cost to replace the roof.  The Company will be responsible for paying its 40% share of the remaining cost to replace the roof, which is expected to be approximately $113,000.  As part of the lease transaction,At December 31, 2017, the Company will payaccrued its 40% share of lease commissions due to real estate brokers totaling $54,294$54,293 that were owed as part of the lease transaction.  This amount was capitalized and will be capitalized and amortized over the term of the lease.  The Company is continuing to pursue additional tenants for the remaining space.

For the ninethree months ended September 30,March 31, 2018 and 2017, and 2016, the Company recognized interest income of $1,199$317 and $1,809,$430, respectively.

Management believes inflation has not significantly affected income from operations.  Leases may contain rent increases, based on the increase in the Consumer Price Index over a specified period, which will result in an increase in rental income over the term of the leases.  Inflation also may cause the real estate to appreciate in value.  However, inflation and changing prices may have an adverse impact on the operating margins of the properties' tenants, which could impair their ability to pay rent and subsequently reduce the Net Cash Flow available for distributions.

During the ninethree months ended September 30,March 31, 2018 and 2017, the Company's cash balances decreased $21,394increased $38,960 and $59,795, respectively, as a result of cash paid for a tenant improvement allowance, which was partially offset by cash generated from operating activities in excess of distributions paid to the Members and cash used to repurchase Units.  During the nine months ended September 30, 2016, the Company's cash balances decreased $1,674,419 as a result of cash used to purchase property, and distributions paid to the Members and cash used to repurchase Units in excess of cash generated from operating activities.Members.

Net cash provided by operating activities decreased from $643,939$230,077 in 20162017 to $555,954$209,064 in 20172018 as a result of a decrease in total rental and interest income in 2017,2018 and a decrease in net timing differences in the collection of payments from the tenants and the payment of expenses, which were partially offset by a decrease in LLC administration and property management expenses in 2017.  During 2016, cash from operations was reduced by $55,479 of acquisition expenses related to the purchase of real estate.  Pursuant to accounting guidance, these expenses were reflected as operating cash outflows.  However, pursuant to the Company's Operating Agreement, acquisition expenses were funded with proceeds from property sales.

On March 31, 2017, the lease term expiredended for the Starbucks store in Bluffton, Indiana.  Effective April 1, 2017, the Company entered into a lease agreement with a primary term of six years with The Cellular Connection LLC, a cell phone retailer that was subleasing the property from Starbucks Corporation.  The tenant is scheduled to pay annual rent of $39,156 during the base lease term.  As part of the lease transaction, the Company paid a tenant improvement allowance of $30,000 that was capitalized and will be depreciated.

The Company's primary use of cash flow, other than investment in real estate, is distribution payments to Members and cash used to repurchase Units.  The Company declares its regular quarterly distributions before the end of each quarter and pays the distribution in the first week after the end of each quarter.  The Company attempts to maintain a stable distribution rate from quarter to quarter.  The Company may repurchase tendered Units on April 1st and October 1st of each year subject to limitations.

For the ninethree months ended September 30,March 31, 2018 and 2017, and 2016, the Company declared distributions of $509,894$170,104 and $639,767,$170,103, respectively.  Pursuant to the Operating Agreement, distributions of Net Cash Flow were allocated 97% to the Limited Members and 3% to the Managing Members.  Distributions of Net Proceeds of Sale were allocated 99% to the Limited Members and 1% to the Managing Members.  The Limited Members received distributions of $495,001$165,001 and $622,999$165,000 and the Managing Members received distributions of $14,893$5,103 and $16,768 for the periods, respectively.

The Company may repurchase Units from Limited Members who have tendered their Units to the Company.  Such Units may be acquired at a discount.  The Company will not be obligated to purchase in any year more than 2% of the total number of Units outstanding on January 1 of such year.  In no event shall the Company be obligated to purchase Units if, in the sole discretion of the Managing Member, such purchase would impair the capital or operation of the Company.

The continuing rent payments from the properties, together with cash generated from property sales, should be adequate to fund continuing distributions and meet other Company obligations on both a short-term and long-term basis.

As of September 30, 2017March 31, 2018 and December 31, 2016,2017, the Company had no material off-balance sheet arrangements that had or are reasonably likely to have current or future effects on its financial condition, results of operations, liquidity or capital resources.

Not required for a smaller reporting company.

(a)  Disclosure Controls and Procedures.

Under the supervision and with the participation of management, including its President and Chief Financial Officer, the Managing Member of the Company evaluated the effectiveness of the design and operation of our disclosure controls and procedures (as defined in Rule 13a-15(e) under the Securities Exchange Act of 1934 (the "Exchange Act")).  Based upon that evaluation, the President and Chief Financial Officer of the Managing Member concluded that, as of the end of the period covered by this report, our disclosure controls and procedures were effective in ensuring that information required to be disclosed by us in the reports that we file or submit under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in applicable rules and forms and that such information is accumulated and communicated to management, including the President and Chief Financial Officer of the Managing Member, in a manner that allows timely decisions regarding required disclosure.

(b)  Changes in Internal Control Over Financial Reporting.

During the most recent period covered by this report, there has been no change in our internal control over financial reporting (as defined in Rule 13a-15(f) under the Exchange Act) that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

There are no material pending legal proceedings to which the Company is a party or of which the Company's property is subject.

Not required for a smaller reporting company.

(a) None.

(b) Not applicable.

(c) Pursuant to Section 7.7 of the Operating Agreement, each Limited Member has the right to present Units to the Company for purchase by submitting notice to the Managing Member during January or July of each year.  The purchase price of the Units is equal to 85% of the net asset value per Unit, as of the first business day of January or July of each year, as determined by the Managing Member in accordance with the provisions of the Operating Agreement.  The purchase price is equal to 100% of the net asset value per Unit in the case of Units of a deceased investor, who purchased the Units in the initial offering and who is a natural person, including Units held by an investor that is an IRA or other qualified plan for which the deceased person was the primary beneficiary, or Units held by an investor that is a grantor trust for which the deceased person was the grantor.

Units tendered to the Company during January and July may be repurchased on April 1^st1st and October 1^st,1st, respectively, of each year subject to the following limitations.  The Company will not be obligated to purchase in any year more than 2% of the total number of Units outstanding on January 1 of such year.  In no event shall the Company be obligated to purchase Units if, in the sole discretion of the Managing Member, such purchase would impair the capital or operation of the Company.  During the period covered by this report, the Company did not purchase any Units.

None.

Not Applicable.

None.

Pursuant to the requirements 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.