UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C.  20549

FORM 10-Q

QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d)
OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended:  SeptemberJune 30, 20172018

Commission File Number:  000-29274

AEI INCOME & GROWTH FUND XXI LIMITED PARTNERSHIP
(Exact name of registrant as specified in its charter)

State of Minnesota 41-1789725
(State or other jurisdiction of
incorporation or organization)
 
(I.R.S. Employer
Identification No.)
   
30 East 7th Street, Suite 1300
St. Paul, Minnesota 55101
 (651) 227-7333
(Address of principal executive offices) (Registrant's telephone number)

Not Applicable
(Former name, former address and former fiscal year, if changed since last report)

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.

Large accelerated filer
Accelerated filer
Non-accelerated filer
Smaller reporting company
Emerging growth company
 

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



AEI INCOME & GROWTH FUND XXI LIMITED PARTNERSHIP

INDEX


  
Page
Part I – Financial Information 
    
 Item 1.Financial Statements: 
    
  Balance Sheets as of SeptemberJune 30, 20172018 and December 31, 201620173
    
  Statements for the Periods ended SeptemberJune 30, 20172018 and 2016:2017: 
     
   IncomeOperations4
     
   Cash Flows5
     
   Changes in Partners' Capital (Deficit)6
     
  Notes to Financial Statements7 - 1011
    
 Item 2.Management's Discussion and Analysis of Financial 
   Condition and Results of Operations1112 - 1617
    
 Item 3.Quantitative and Qualitative Disclosures About Market Risk1617
    
 Item 4.Controls and Procedures1617
    
Part II – Other Information 
    
 Item 1.Legal Proceedings1718
    
 Item 1A.Risk Factors1718
    
 Item 2.Unregistered Sales of Equity Securities and Use of Proceeds1718
    
 Item 3.Defaults Upon Senior Securities1718
    
 Item 4.Mine Safety Disclosures1719
    
 Item 5.Other Information1719
    
 Item 6.Exhibits1819
    
Signatures1819

Page- 2 of 18-

AEI INCOME & GROWTH FUND XXI LIMITED PARTNERSHIP
BALANCE SHEETS

ASSETS

 September 30,  December 31,  June 30,  December 31, 
 2017  2016  2018  2017 
 (unaudited)     (unaudited)    
Current Assets:            
Cash $502,495  $691,125  $931,930  $2,142,394 
Receivables  91,761   50,817 
Total Current Assets  1,023,691   2,193,211 
                
Real Estate Investments:                
Land  3,659,461   3,839,216   3,659,461   3,659,461 
Buildings  10,339,539   11,377,241   10,339,539   10,339,539 
Acquired Intangible Lease Assets  807,178   807,178   807,178   807,178 
Real Estate Held for Investment, at cost  14,806,178   16,023,635   14,806,178   14,806,178 
Accumulated Depreciation and Amortization  (3,651,584)  (3,650,418)  (4,004,447)  (3,769,205)
Real Estate Held for Investment, Net  11,154,594   12,373,217   10,801,731   11,036,973 
Real Estate Held for Sale  652,572   0 
Total Real Estate Investments  11,807,166   12,373,217 
Total Assets $12,309,661  $13,064,342  $11,825,422  $13,230,184 

LIABILITIES AND PARTNERS' CAPITAL

Current Liabilities:            
Payable to AEI Fund Management, Inc. $238  $27,151  $57,045  $27,235 
Distributions Payable  208,282   261,212   198,181   1,218,384 
Unearned Rent  34,520   12,121   32,917   0 
Total Current Liabilities  243,040   300,484   288,143   1,245,619 
                
Long-term Liabilities:                
Acquired Below-Market Lease Intangibles, Net  111,530   125,855   97,205   106,755 
                
Partners' Capital (Deficit):
        
Partners' Capital :
        
General Partners  (25,382)  (18,553)  5,695   10,072 
Limited Partners – 24,000 Units authorized;
19,616 and 19,636 Units issued and outstanding
as of 9/30/17 and 12/31/16, respectively
  11,980,473   12,656,556 
Limited Partners – 24,000 Units authorized;
19,402 and 19,616 Units issued and outstanding
as of 6/30/2018 and 12/31/2017, respectively
  11,434,379   11,867,738 
Total Partners' Capital  11,955,091   12,638,003   11,440,074   11,877,810 
Total Liabilities and Partners' Capital $12,309,661  $13,064,342  $11,825,422  $13,230,184 

The accompanying Notes to Financial Statements are an integral part of these statements.
Page- 3 of 18-

AEI INCOME & GROWTH FUND XXI LIMITED PARTNERSHIP
STATEMENTS OF INCOMEOPERATIONS
(unaudited)


 Three Months Ended September 30  Nine Months Ended September 30  Three Months Ended June 30  Six Months Ended June 30 
 2017  2016  2017  2016  2018  2017  2018  2017 
                        
Rental Income $292,215  $328,755  $924,167  $971,456  $259,213  $297,795  $518,177  $631,952 
                                
Expenses:                                
Partnership Administration – Affiliates  41,384   41,010   128,126   127,367   34,466   41,998   72,096   86,742 
Partnership Administration and Property
Management – Unrelated Parties
  51,348   7,891   88,753   40,075   37,381   22,356   65,742   37,405 
Property Acquisition  0   27   0   56,760 
Depreciation and Amortization  117,621   132,964   642,801   389,933   117,621   392,216   235,242   525,180 
Total Expenses  210,353   181,892   859,680   614,135   189,468   456,570   373,080   649,327 
                                
Operating Income  81,862   146,863   64,487   357,321 
Operating Income (Loss)  69,745   (158,775)  145,097   (17,375)
                                
Other Income:                                
Interest Income  302   549   1,097   2,361   1,536   374   2,373   795 
                                
Net Income $82,164  $147,412  $65,584  $359,682 
Net Income (Loss) $71,281  $(158,401) $147,470  $(16,580)
                                
Net Income Allocated:                
Net Income (Loss) Allocated:                
General Partners $822  $1,474  $656  $3,597  $713  $(1,584) $1,475  $(166)
Limited Partners  81,342   145,938   64,928   356,085   70,568   (156,817)  145,995   (16,414)
Total $82,164  $147,412  $65,584  $359,682  $71,281  $(158,401) $147,470  $(16,580)
                                
Net Income per Limited Partnership Unit $4.15  $7.36  $3.31  $17.87 
Net Income (Loss) per Limited
Partnership Unit
 $3.64  $(7.99) $7.48  $(.84)
                                
Weighted Average Units Outstanding –
Basic and Diluted
  19,616   19,841   19,622   19,929   19,402   19,616   19,509   19,626 
                                









The accompanying Notes to Financial Statements are an integral part of these statements.
Page- 4 of 18-

AEI INCOME & GROWTH FUND XXI LIMITED PARTNERSHIP
STATEMENTS OF CASH FLOWS
(unaudited)


  Nine Months Ended September 30 
  2017  2016 
Cash Flows from Operating Activities:      
Net Income $65,584  $359,682 
         
Adjustments to Reconcile Net Income
To Net Cash Provided by Operating Activities:
        
Depreciation and Amortization  628,476   376,959 
Increase (Decrease) in Payable to
   AEI Fund Management, Inc.
  (26,913)  6,829 
Increase (Decrease) in Unearned Rent  22,399   22,400 
Total Adjustments  623,962   406,188 
Net Cash Provided By (Used For)
   Operating Activities
  689,546   765,870 
         
Cash Flows from Investing Activities:        
Investments in Real Estate  (76,750)  (1,809,915)
         
Cash Flows from Financing Activities:        
Distributions Paid to Partners  (783,632)  (789,501)
Repurchase of Partnership Units  (17,794)  (235,431)
Net Cash Provided By (Used For)
   Financing Activities
  (801,426)  (1,024,932)
         
Net Increase (Decrease) in Cash  (188,630)  (2,068,977)
         
Cash, beginning of period  691,125   2,925,122 
         
Cash, end of period $502,495  $856,145 
         




  Six Months Ended June 30 
  2018  2017 
Cash Flows from Operating Activities:      
Net Income (Loss) $147,470  $(16,580)
         
Adjustments to Reconcile Net Income (Loss)
To Net Cash Provided by Operating Activities:
        
Depreciation and Amortization  225,692   515,630 
(Increase) Decrease in Receivables  (40,944)  (46,315)
Increase (Decrease) in Payable to
   AEI Fund Management, Inc.
  29,810   (7,186)
Increase (Decrease) in Unearned Rent  32,917   31,797 
Total Adjustments  247,475   493,926 
Net Cash Provided By (Used For)
   Operating Activities
  394,945   477,346 
         
Cash Flows from Investing Activities:        
Investments in Real Estate  0   (76,750)
         
Cash Flows from Financing Activities:        
Distributions Paid to Partners  (1,416,564)  (522,423)
Repurchase of Partnership Units  (188,845)  (17,794)
Net Cash Provided By (Used For)
   Financing Activities
  (1,605,409)  (540,217)
         
Net Increase (Decrease) in Cash  (1,210,464)  (139,621)
         
Cash, beginning of period  2,142,394   691,125 
         
Cash, end of period $931,930  $551,504 
         
         
         
         


The accompanying Notes to Financial Statements are an integral part of these statements.
Page- 5 of 18-

AEI INCOME & GROWTH FUND XXI LIMITED PARTNERSHIP
STATEMENTS OF CHANGES IN PARTNERS' CAPITAL (DEFICIT)
(unaudited)


 General Partners  Limited Partners  Total  Limited Partnership Units Outstanding 
            
Balance, December 31, 2015 $(9,126) $13,589,851  $13,580,725   20,104.88 
                
Distributions Declared  (7,866)  (778,703)  (786,569)    
                
Repurchase of Partnership Units  (2,355)  (233,076)  (235,431)  (264.01)
                
Net Income  3,597   356,085   359,682     
                
Balance, September 30, 2016 $(15,750) $12,934,157  $12,918,407   19,840.87 
                 General Partners  Limited Partners  Total  Limited Partnership Units Outstanding 
                            
Balance, December 31, 2016 $(18,553) $12,656,556  $12,638,003   19,635.64  $(18,553) $12,656,556  $12,638,003   19,635.64 
                                
Distributions Declared  (7,307)  (723,395)  (730,702)      (5,224)  (517,196)  (522,420)    
                                
Repurchase of Partnership Units  (178)  (17,616)  (17,794)  (20.00)  (178)  (17,616)  (17,794)  (20.00)
                                
Net Loss  (166)  (16,414)  (16,580)    
                
Balance, June 30, 2017 $(24,121) $12,105,330  $12,081,209   19,615.64 
                
                
Balance, December 31, 2017 $10,072  $11,867,738  $11,877,810   19,615.64 
                
Distributions Declared  (3,964)  (392,397)  (396,361)    
                
Repurchase of Partnership Units  (1,888)  (186,957)  (188,845)  (213.34)
                
Net Income  656   64,928   65,584       1,475   145,995   147,470     
                                
Balance, September 30, 2017 $(25,382) $11,980,473  $11,955,091   19,615.64 
Balance, June 30, 2018 $5,695  $11,434,379  $11,440,074   19,402.30 
                                
















The accompanying Notes to Financial Statements are an integral part of these statements.
Page- 6 of 18-

AEI INCOME & GROWTH FUND XXI LIMITED PARTNERSHIP
NOTES TO FINANCIAL STATEMENTS
SEPTEMBERJUNE 30, 20172018
(unaudited)

(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.

(2)  Organization –

AEI Income & Growth Fund XXI Limited Partnership ("Partnership") was formed to acquire and lease commercial properties to operating tenants.  The Partnership's operations are managed by AEI Fund Management XXI, Inc. ("AFM"), the Managing General Partner.  Robert P. Johnson, the President and sole director of AFM, serves as the Individual General Partner.  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 Partnership.

The terms of the Partnership offering called for a subscription price of $1,000 per Limited Partnership Unit, payable on acceptance of the offer.  The Partnership commenced operations on April 14, 1995 when minimum subscriptions of 1,500 Limited Partnership Units ($1,500,000) were accepted.  On January 31, 1997, the offering terminated when the maximum subscription limit of 24,000 Limited Partnership Units was reached.  Under the terms of the Limited Partnership Agreement, the Limited Partners and General Partners contributed funds of $24,000,000 and $1,000, respectively.

During operations, any Net Cash Flow, as defined, which the General Partners determine to distribute will be distributed 90% to the Limited Partners and 10% to the General Partners; provided, however, that such distributions to the General Partners will be subordinated to the Limited Partners first receiving an annual, noncumulative distribution of Net Cash Flow equal to 10% of their Adjusted Capital Contribution, as defined, and, provided further, that in no event will the General Partners receive less than 1% of such Net Cash Flow per annum.  Distributions to Limited Partners will be made pro rata by Units.

Page- 7 of 18-

AEI INCOME & GROWTH FUND XXI LIMITED PARTNERSHIP
NOTES TO FINANCIAL STATEMENTS
(Continued)

(2)  Organization – (Continued)

Any Net Proceeds of Sale, as defined, from the sale or financing of properties which the General Partners determine to distribute will, after provisions for debts and reserves, be paid in the following manner: (i) first, 99% to the Limited Partners and 1% to the General Partners until the Limited Partners receive an amount equal to: (a) their Adjusted Capital Contribution plus (b) an amount equal to 10% of their Adjusted Capital Contribution per annum, cumulative but not compounded, to the extent not previously distributed from Net Cash Flow;  (ii) any remaining balance will be distributed 90% to the Limited Partners and 10% to the General Partners.  Distributions to the Limited Partners 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 first in the same ratio in which, and to the extent, Net Cash Flow is distributed to the Partners for such year.  Any additional profits will be allocated in the same ratio as the last dollar of Net Cash Flow is distributed.  Net losses from operations will be allocated 99% to the Limited Partners and 1% to the General Partners.

For tax purposes, profits arising from the sale, financing, or other disposition of property will be allocated in accordance with the Partnership Agreement as follows: (i) first, to those partners with deficit balances in their capital accounts in an amount equal to the sum of such deficit balances; (ii) second, 99% to the Limited Partners and 1% to the General Partners until the aggregate balance in the Limited Partners' capital accounts equals the sum of the Limited Partners' Adjusted Capital Contributions plus an amount equal to 10% 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 Partners and 10% to the General Partners.  Losses will be allocated 98% to the Limited Partners and 2% to the General Partners.

The General Partners are not required to currently fund a deficit capital balance.  Upon liquidation of the Partnership or withdrawal by a General Partner, the General Partners will contribute to the Partnership an amount equal to the lesser of the deficit balances in their capital accounts or 1% of total Limited Partners' and General Partners' capital contributions.

In January 2014, the Managing General Partner mailed a Consent Statement (Proxy) seeking the consent of the Limited Partners to continue the Partnership for an additional 60 months or to initiate the final disposition, liquidation and distribution of all of the Partnership's properties and assets.  On February 14, 2014, the proposal to continue the Partnership was approved with a majority of Units voted in favor of the continuation proposal.  As a result, the Managing General Partner will continue the operations of the Partnership for an additional 60 months at which time it will again ask the Limited Partners to vote on the same two proposals.

Page- 8 of 18-

AEI INCOME & GROWTH FUND XXI LIMITED PARTNERSHIP
NOTES TO FINANCIAL STATEMENTS
(Continued)

(3)  Real Estate InvestmentsRecently Adopted Accounting Pronouncements

On February 3,In May 2014, with subsequent updates issued in August 2015 and March, April and May 2016, the Partnership 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 Cincinnati, Ohio for $1,809,915.  The Partnership allocated $285,049accordance with this principle.  Those steps include the following:  (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 each performance obligation in the contract, and (v) recognize revenue when or as the entity satisfies a performance obligation.

Management has concluded that all of the purchase pricePartnership's material revenue streams fall outside of the scope of this guidance.  The new standard may be applied retrospectively to Acquired Intangible Lease Assets, representing in-place lease intangibles, and allocated $80,404 to Acquired Below-Market Lease Intangibles. The Partnership incurred $56,760 of acquisition expenses related toeach prior period presented or prospectively with the purchase that were expensed.  The property is leased to Dollar Tree Stores, Inc. under a lease agreement with a remaining primary term of 10 years (ascumulative effect, if any, recognized as of the date of purchase)adoption.  During 2018, the Partnership selected the modified retrospective transition method as of the date of adoption effective January 1, 2018.  Management has concluded that the majority of total revenues consist of rental income from leasing arrangements, which are specifically excluded from the standard.  The Partnership analyzed its remaining revenue streams, inclusive of gains and losses on real estate sales, and concluded there are no changes in revenue recognition with the adoption of the new standard.  As such, adoption of the standard did not result in a cumulative adjustment recognized as of January 1, 2018, and the standard did not have a material impact on the Partnership's financial statements.

In January 2017, the FASB issued ASU 2017-01, which clarifies the definition of a business by adding guidance to assist entities in evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses.  The guidance is effective for annual rentperiods beginning after December 15, 2017, including interim periods within those periods, with early adoption permitted, and is required to be applied prospectively to any transactions occurring within the period of $122,169.adoption.  We expect the new standard will result in all of our real estate acquisitions being considered asset acquisitions, whereby substantially all acquisition costs related to our real estate acquisitions will be capitalized.  Prior to the adoption of the new standard, all of our real estate acquisitions completed after January 1, 2009, were considered acquisitions of businesses, whereby all acquisition-related costs were expensed as incurred.  During 2018, the Partnership has adopted the accounting pronouncement effective January 1, 2018, and applied this guidance prospectively.  The adoption did not have a material effect on its financial statements.

- 9 -

AEI INCOME & GROWTH FUND XXI LIMITED PARTNERSHIP
NOTES TO FINANCIAL STATEMENTS
(Continued)

(4)  Real Estate Investments –

The Partnership owns a 30% interest in the Gander Mountain store in Champaign, Illinois.  The remaining interests in the property are owned by affiliates of the Partnership.  On March 10, 2017, Gander Mountain Company filed for Chapter 11 reorganization and announced it was closing the store, following a liquidation sale of its on‑site assets.  In June 2017, the tenant filed a motion with the bankruptcy court to reject the lease for this store effective June 30, 2017.  At this time, the tenant returned possession of the property to the owners and the Partnership became responsible for its 30% share of real estate taxes and other costs associated with maintaining the property.  The tenant paid rent through June 2017.  The owners have listed the property for lease with a real estate broker in the Champaign area.  The annual rent from this property represented approximately 13% of the total annual rent of the Partnership's property portfolio.  The loss of rent and increased expenses related to this property decreased the Partnership's cash flow.  Consequently, beginning with the third quarter of 2017, the Partnership reduced its regular quarterly cash distribution rate from $13.18 per Unit to $10.51 per Unit.

As a result of the bankruptcy court terminating the lease for the Gander Mountain store, the Partnership included an additional $270,097 in Depreciation and Amortization in the second quarter of 2017, which represented the unamortized balance of the in-place lease intangible that was created when the property was purchased in 2014.

In March 2017, the Partnership entered into an agreement with the tenant of the KinderCare daycare center in Andover, Minnesota to extend the lease term five years to expireend on June 30, 2022.  The annual rent will remain the same throughout the remainder of the extended lease term.  As part of the agreement, the Partnership paid a tenant improvement allowance of $30,000 that was capitalized.  In addition, beginning on April 1, 2017, the tenant received free rent for three months that equaled $36,362.

In the first quarter of 2017, the Partnership decided to sell the property.  At September 30, 2017, the property was classified as Real Estate Held for Sale with a carrying value of $652,572.

KinderCare daycare center.  In October 2017, the Partnership entered into an agreement to sell the KinderCareproperty to an unrelated third party.  The sale is subject to contingencies and may not be completed.  IfOn November 14, 2017, the sale is completed,closed with the Partnership expects to receivereceiving net proceeds of approximately $1,695,000,$1,696,401, which will resultresulted in a net gain of approximately $1,042,400.

Page 9$1,043,829.  At the time of 18

AEI INCOME & GROWTH FUND XXI LIMITED PARTNERSHIP
NOTES TO FINANCIAL STATEMENTS
(Continued)

(3)  Real Estate Investments – (Continued)sale, the cost and related accumulated depreciation was $1,294,207 and $641,635, respectively.

In April 2017, the Partnership entered into an agreement with the tenant of the Fresenius Medical Center in Shreveport, Louisiana to extend the lease term nine years to expireend on June 30, 2027.  The annual rent will remain the same throughout the remainder of the extended lease term.  As part of the agreement, the Partnership paid a tenant improvement allowance of $46,750 that was capitalized and will be depreciated.

(4)
- 10 -

AEI INCOME & GROWTH FUND XXI LIMITED PARTNERSHIP
NOTES TO FINANCIAL STATEMENTS
(Continued)

(5)  Payable to AEI Fund Management, Inc. –

AEI Fund Management, Inc. performs the administrative and operating functions for the Partnership.  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.

(5)(6)  Partners' Capital –

For the ninesix months ended SeptemberJune 30, 20172018 and 2016,2017, the Partnership declared distributions of $730,702$396,361 and $786,569,$522,420, respectively.  The Limited Partners received distributions of $723,395$392,397 and $778,703$517,196 and the General Partners received distributions of $7,307$3,964 and $7,866$5,224 for the periods, respectively.  The Limited Partners' distributions represented $36.87$20.11 and $39.07$26.35 per Limited Partnership Unit outstanding using 19,62219,509 and 19,92919,626 weighted average Units in 20172018 and 2016,2017, respectively.  The distributions represented $2.41$0.00 and $17.87$0.00 per Unit of Net Income and $34.46$20.11 and $21.20$26.35 per Unit of return of contributed capital in 20172018 and 2016,2017, respectively.

As part of the distributions discussed above, the Partnership distributed net sale proceeds (from property sales completed in 2014) of $197,980 and $68,812 in 2017.2018 and 2017, respectively.  The Limited Partners received distributions of $196,000 and $68,124 and the General Partners received distributions of $688.$1,980 and $688 for the periods, respectively.  The Limited Partners' distributions represented $10.10 and $3.47 per Unit.Unit for the periods, respectively.

On April 1, 2018, the Partnership repurchased a total of 213.34 Units for $186,957 from eight Limited Partners in accordance with the Partnership Agreement.  On April 1, 2017, the Partnership repurchased a total of 20.00 Units for $17,616 from one Limited Partner in accordance with the Partnership Agreement.Partner. The Partnership acquired these Units using Net Cash Flow from operations.  On April 1, 2016, the Partnership repurchased a total of 264.01 Units for $233,076 from 12 Limited Partners. The Partnership acquired these Units using net sale proceeds.  The repurchases increase the remaining Limited Partners' ownership interest in the Partnership.  As a result of these repurchases and pursuant to the Partnership Agreement, the General Partners received distributions of $1,888 and $178 in 2018 and $2,355 in 2017, and 2016, respectively.

(6)(7)  Fair Value Measurements –

As of SeptemberJune 30, 20172018 and December 31, 2016,2017, the Partnership had no assets or liabilities measured at fair value on a recurring basis or nonrecurring basis.

Page 10 of 18- 11 -

ITEM 2.  MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL
CONDITION AND RESULTS OF OPERATIONS.

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 Partnership's financial condition and results of operations, including the following:

Market and economic conditions which affect the value of the properties the Partnership owns and the cash from rental income such properties generate;
the federal income tax consequences of rental income, deductions, gain on sales and other items and the effects of these consequences for the Partners;
resolution by the General Partners of conflicts with which they may be confronted;
the success of the General Partners of locating properties with favorable risk return characteristics;
the effect of tenant defaults; and
the condition of the industries in which the tenants of properties owned by the Partnership operate.

Application of Critical Accounting Policies

The Partnership'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 Partnership'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 Partnership's assets and liabilities, or the results of reported operations, will be affected if management's estimates or assumptions prove inaccurate.

Management of the Partnership 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 partner of the Partnership.

Allocation of Purchase Price of Acquired Properties

Upon acquisition of real properties, the Partnership 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.

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ITEM 2.  MANAGEMENT'S DISCUSSION AND ANALYSIS.  (Continued)

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.

Carrying Value of Properties

Properties are carried at original cost, less accumulated depreciation and amortization.  The Partnership tests long-lived assets for recoverability when events or changes in circumstances indicate that the carrying value may not be recoverable.  For properties the Partnership 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.

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ITEM 2.  MANAGEMENT'S DISCUSSION AND ANALYSIS.  (Continued)

Allocation of Expenses

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 Partnership reimburses these expenses subject to detailed limitations contained in the Partnership Agreement.

Results of Operations

For the ninesix months ended SeptemberJune 30, 20172018 and 2016,2017, the Partnership recognized rental income of $924,167$518,177 and $971,456,$631,952, respectively.  In 2017,2018, rental income decreased due to the tenantsale of the KinderCare daycare center receiving free rent,one property in 2017 and the Gander Mountain situation, as discussed below.  These decreases were partially offset by additionala rent received fromincrease on one property acquisition in 2016 and rent increases on two properties.property.  Based on the scheduled rent for the properties as of OctoberJuly 31, 2017,2018, the Partnership expects to recognize rental income of approximately $1,216,000 and $1,182,000$1,037,000 in 2017 and 2018, respectively.2018.

For the ninesix months ended SeptemberJune 30, 20172018 and 2016,2017, the Partnership incurred Partnership administration expenses from affiliated parties of $128,126$72,096 and $127,367,$86,742, respectively.  These administration expenses include costs associated with the management of the properties, processing distributions, reporting requirements and communicating with the Limited Partners.  During the same periods, the Partnership incurred Partnership administration and property management expenses from unrelated parties of $88,753$65,742 and $40,075,$37,405, 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.  These expenses were higher in 2017,2018, when compared to 2016,2017, due to expenses related to the Gander Mountain store.

For the nine months ended September 30, 2016, the Partnership incurred property acquisition expenses of $56,760 related to the purchase of the Dollar Tree store in Cincinnati, Ohio.

The Partnership owns a 30% interest in the Gander Mountain store in Champaign, Illinois.  The remaining interests in the property are owned by affiliates of the Partnership.  On March 10, 2017, Gander Mountain Company filed for Chapter 11 reorganization and announced it was closing the store, following a liquidation sale of its on‑site assets.  In June 2017, the tenant filed a motion with the bankruptcy court to reject the lease for this store effective June 30, 2017.  At this time, the tenant returned possession of the property to the owners and the Partnership became responsible for its 30% share of real estate taxes and other costs associated with maintaining the property.  The tenant paid rent through June 2017.  The owners have listed the property for lease with a real estate broker in the Champaign area.  The annual rent from this property represented approximately 13% of the total annual rent of the Partnership's property portfolio.  The loss of rent and increased expenses related to this property decreased the Partnership's cash flow.  Consequently, beginning with the third quarter of 2017, the Partnership reduced its regular quarterly cash distribution rate from $13.18 per Unit to $10.51 per Unit.

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ITEM 2.  MANAGEMENT'S DISCUSSION AND ANALYSIS.  (Continued)

As a result of the bankruptcy court terminating the lease for the Gander Mountain store, the Partnership included an additional $270,097 in Depreciation and Amortization in the second quarter of 2017, which represented the unamortized balance of the in-place lease intangible that was created when the property was purchased in 2014.
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ITEM 2.  MANAGEMENT'S DISCUSSION AND ANALYSIS.  (Continued)

In March 2017, the Partnership entered into an agreement with the tenant of the KinderCare daycare center in Andover, Minnesota to extend the lease term five years to expireend on June 30, 2022.  The annual rent will remain the same throughout the remainder of the extended lease term.  As part of the agreement, the Partnership paid a tenant improvement allowance of $30,000 that was capitalized.  In addition, beginning on April 1, 2017, the tenant received free rent for three months that equaled $36,362.

In the first quarter of 2017, the Partnership decided to sell the property.  At September 30, 2017, the property was classified as Real Estate Held for Sale with a carrying value of $652,572.

KinderCare daycare center.  In October 2017, the Partnership entered into an agreement to sell the KinderCareproperty to an unrelated third party.  The sale is subject to contingencies and may not be completed.  IfOn November 14, 2017, the sale is completed,closed with the Partnership expects to receivereceiving net proceeds of approximately $1,695,000,$1,696,401, which will resultresulted in a net gain of approximately $1,042,400.$1,043,829.  At the time of sale, the cost and related accumulated depreciation was $1,294,207 and $641,635, respectively.

For the ninesix months ended SeptemberJune 30, 20172018 and 2016,2017, the Partnership recognized interest income of $1,097$2,373 and $2,361,$795, 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.

Liquidity and Capital Resources

During the ninesix months ended SeptemberJune 30, 2018, the Partnership's cash balances decreased $1,210,464 as a result of distributions paid to the Partners and cash used to repurchase Units in excess of cash generated from operating activities.  During the six months ended June 30, 2017, the Partnership's cash balances decreased $188,630$139,621 as a result of cash paid for tenant improvement allowances, and distributions paid to the Partners and cash used to repurchase Units in excess of cash generated from operating activities.  During the nine months ended September 30, 2016, the Partnership's cash balances decreased $2,068,977 as a result of cash used to purchase property, and distributions paid to the Partners and cash used to repurchase Units in excess of cash generated from operating activities.

Net cash provided by operating activities decreased from $765,870$477,346 in 20162017 to $689,546$394,945 in 20172018 as a result of a decrease in total rental and interest income in 2017,2018 and an increase in Partnership administration and property management expenses in 2017 and2018, which were partially offset by net timing differences in the collection of payments from the tenants and the payment of expenses.  During 2016, cash from operations was reduced by $56,760 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 Partnership Agreement, acquisition expenses were funded with proceeds from property sales.
Page 14 of 18

ITEM 2.  MANAGEMENT'S DISCUSSION AND ANALYSIS.  (Continued)

The major components of the Partnership's cash flow from investing activities are investments in real estate and proceeds from the sale of real estate.  During the ninesix months ended SeptemberJune 30, 2017, and 2016, the Partnership expended $76,750 and $1,809,915, respectively, to invest in real properties as the Partnership reinvested cash generated from property sales completed in 2014.properties.

On February 3, 2016, the Partnership purchased a Dollar Tree store in Cincinnati, Ohio for $1,809,915.  The property is leased to Dollar Tree Stores, Inc. under a lease agreement with a remaining primary term of 10 years (as of the date of purchase) and annual rent of $122,169.
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ITEM 2.  MANAGEMENT'S DISCUSSION AND ANALYSIS.  (Continued)

In April 2017, the Partnership entered into an agreement with the tenant of the Fresenius Medical Center in Shreveport, Louisiana to extend the lease term nine years to expireend on June 30, 2027.  The annual rent will remain the same throughout the remainder of the extended lease term.  As part of the agreement, the Partnership paid a tenant improvement allowance of $46,750 that was capitalized and will be depreciated.

The Partnership's primary use of cash flow, other than investment in real estate, is distribution payments to Partners and cash used to repurchase Units.  The Partnership 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 Partnership attempts to maintain a stable distribution rate from quarter to quarter.  The Partnership may repurchase tendered Units on April 1st and October 1st of each year subject to limitations.

For the ninesix months ended SeptemberJune 30, 20172018 and 2016,2017, the Partnership declared distributions of $730,702$396,361 and $786,569,$522,420, respectively, which were distributed 99% to the Limited Partners and 1% to the General Partners.  The Limited Partners received distributions of $723,395$392,397 and $778,703$517,196 and the General Partners received distributions of $7,307$3,964 and $7,866$5,224 for the periods, respectively.  In December 2017, the Partnership declared a special distribution of net sale proceeds of $1,010,101 which was paid in the first week of January 2018 and resulted in higher distributions paid in 2018 and a higher distributions payable at December 31, 2017.

As part of the distributions discussed above, the Partnership distributed net sale proceeds (from property sales completed in 2014) of $197,980 and $68,812 in 2017.2018 and 2017, respectively.  The Limited Partners received distributions of $196,000 and $68,124 and the General Partners received distributions of $688.$1,980 and $688 for the periods, respectively.  The Limited Partners' distributions represented $10.10 and $3.47 per Unit.Unit for the periods, respectively.

The Partnership may repurchase Units from Limited Partners who have tendered their Units to the Partnership.  Such Units may be acquired at a discount.  The Partnership will not be obligated to purchase in any year more thanany number of Units that, when aggregated with all other transfers of Units that have occurred since the beginning of the same calendar year (excluding Permitted Transfers as defined in the Partnership Agreement), would exceed 5% of the total number of Units outstanding on January 1 of such year.  In no event shall the Partnership be obligated to purchase Units if, in the sole discretion of the Managing General Partner, such purchase would impair the capital or operation of the Partnership.

Page 15On April 1, 2018, the Partnership repurchased a total of 18

ITEM 2.  MANAGEMENT'S DISCUSSION AND ANALYSIS.  (Continued)

213.34 Units for $186,957 from eight Limited Partners in accordance with the Partnership Agreement.  On April 1, 2017, the Partnership repurchased a total of 20.00 Units for $17,616 from one Limited Partner in accordance with the Partnership Agreement.Partner. The Partnership acquired these Units using Net Cash Flow from operations.  On April 1, 2016, the Partnership repurchased a total of 264.01 Units for $233,076 from 12 Limited Partners. The Partnership acquired these Units using net sale proceeds.  The repurchases increase the remaining Limited Partners' ownership interest in the Partnership.  As a result of these repurchases and pursuant to the Partnership Agreement, the General Partners received distributions of $1,888 and $178 in 2018 and $2,355 in 2017, and 2016, respectively.

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ITEM 2.  MANAGEMENT'S DISCUSSION AND ANALYSIS.  (Continued)

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

Off-Balance Sheet Arrangements

As of SeptemberJune 30, 20172018 and December 31, 2016,2017, the Partnership 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.

ITEM 3.  QUANTITATIVE & QUALITATIVE DISCLOSURES ABOUT MARKET RISK.

Not required for a smaller reporting company.

ITEM 4.  CONTROLS AND PROCEDURES.

(a)  Disclosure Controls and Procedures.

Under the supervision and with the participation of management, including its President and Chief Financial Officer, the Managing General Partner of the Partnership 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 General Partner 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 General Partner, 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.


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PART II – OTHER INFORMATION

ITEM 1.  LEGAL PROCEEDINGS.

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

ITEM 1A.  RISK FACTORS.

Not required for a smaller reporting company.

ITEM 2.  UNREGISTERED SALES OF EQUITY SECURITIES & USE OF PROCEEDS.

(a) None.

(b) Not applicable.

(c) Pursuant to Section 7.7 of the Partnership Agreement, as amended, each Limited Partner has the right to present Units to the Partnership for purchase by submitting notice to the Managing General Partner during January or July of each year.  The purchase price of the Units is equal to 95% 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 General Partner in accordance with the provisions of the Partnership Agreement.  Units tendered to the Partnership during January and July may be repurchased on April 1st and October 1st, respectively, of each year subject to the following limitations.  The Partnership will not be obligated to purchase in any year more than 5% of the total number of Units outstanding on January 1 of such year.  In no event shall the Partnership be obligated to purchase Units if, in the sole discretion of the Managing General Partner, such purchase would impair the capital or operation of the Partnership.  During the period covered by this report, the Partnership did not purchase any Units.

Small Business Issuer Purchases of Equity Securities

Period
Total Number
of Units
Purchased
Average
Price Paid
per Unit
Total Number of Units
Purchased as Part of
Publicly Announced
Plans or Programs
Maximum Number
of Units that May Yet
Be Purchased Under
the Plans or Programs
     
4/1/18 to 4/30/18213.34$876.334,597.70(1)(2)
     
5/1/18 to 5/31/18--------
     
6/1/18 to 6/30/18--------

(1)The Partnership's repurchase plan is mandated by the Partnership Agreement as included in the prospectus related to the original offering of the Units.
(2)The Partnership Agreement contains annual limitations on repurchases described in the paragraph above and has no expiration date.

ITEM 3.  DEFAULTS UPON SENIOR SECURITIES.

None.

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ITEM 4.  MINE SAFETY DISCLOSURES.

Not Applicable.

ITEM 5.  OTHER INFORMATION.

None.

Page 17 of 18

ITEM 6.  EXHIBITS.

31.1Certification of Chief Executive Officer of General Partner pursuant to Rule 15d-14(a)(17 CFR 240.15d-14(a)) and Section 302 of the Sarbanes-Oxley Act of 2002.

31.2Certification of Chief Financial Officer of General Partner pursuant to Rule 15d-14(a)(17 CFR 240.15d-14(a)) and Section 302 of the Sarbanes-Oxley Act of 2002.

32Certification of Chief Executive Officer and Chief Financial Officer of General Partner pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.



SIGNATURES

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.


Dated:  NovemberAugust 13, 20172018AEI Income & Growth Fund XXI
 Limited Partnership
 By:AEI Fund Management XXI, Inc.
 Its:Managing General Partner
   
   
   
 By: /s/ ROBERT P JOHNSON
  Robert P. Johnson
  President
  (Principal Executive Officer)
   
   
   
 By: /s/ PATRICK W KEENE
  Patrick W. Keene
  Chief Financial Officer
  (Principal Accounting Officer)




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