Sec Form 4 Filing - Van Mourick Mark @ National Storage Affiliates Trust - 2018-08-27

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Van Mourick Mark 2. Issuer Name and Ticker or Trading Symbol National Storage Affiliates Trust [ NSA] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 187 MONARCH BAY DRIVE 3. Date of Earliest Transaction (MM/DD/YY) 08/27/2018 (Street) DANA POINT, CA92629 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common shares of beneficial interest, $0.01 par value ( 1 ) 08/27/2018 C 10,000 ( 1 ) ( 2 ) A $ 0 ( 1 ) 10,000 ( 1 ) ( 2 ) ( 3 ) I See Footnote ( 1 ) ( 2 )

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Class A OP Units ( 1 ) ( 1 ) 08/27/2018 C 10,000 ( 1 ) ( 1 ) ( 4 ) Common shares of beneficial interest, $0.01 par value 10,000 $ 0 ( 1 ) 94,374 ( 1 ) ( 2 ) ( 3 ) I See Footnote ( 1 ) ( 2 )

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Van Mourick Mark 187 MONARCH BAY DRIVE DANA POINT, CA92629 X Signatures Mark Van Mourick, by Jason Parsont, his Attorney-in-fact 08/29/2018 Signature of Reporting Person Date

Explanation of Responses:

( 1 )The Reporting Person redeemed 10,000 Class A common units of limited partner interest (the "Class A OP Units") of NSA OP, LP (the "Partnership"), of which National Storage Affiliates Trust (the "Issuer") is the general partner. These Class A OP Units were held by Van Mourick Diversified, L.P., an entity in which the Reporting Person is a controlling person and has or shares voting and investment power over its portfolio, which received 10,000 common shares of beneficial interest ("Shares") of the Issuer upon redemption. ( 2 )This filing shall not be deemed to be an admission that the Reporting Person is the beneficial owner of any of the securities reported herein, and the Reporting Person disclaims beneficial ownership of such securities except to the extent of the Reporting Person's pecuniary interest therein. ( 3 )The Reporting Person's total direct and indirect beneficial ownership following the reported transactions above is (i) 10,000 Shares, and (ii) 94,374 Class A OP Units (which includes those securities convertible into, or exchangeable for, such Class A OP Units as previously reported). The 94,374 Class A OP Units referred to above do not include derivative securities of other classes or non-derivative securities of the Reporting Person that were previously reported. ( 4 )N/A

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

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