# EDGAR Filing Document

**Accession Number:** 0001639296
**File Stem:** 0001628280-23-005927
**Filing Date:** 2023-3
**Character Count:** 8687
**Document Hash:** 788794b929a2ca435c6be8defb444394
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001628280-23-005927.hdr.sgml**: 20230301

**ACCESSION NUMBER**: 0001628280-23-005927

**CONFORMED SUBMISSION TYPE**: 4

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20230227

**FILED AS OF DATE**: 20230301

**DATE AS OF CHANGE**: 20230301

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Van Mourick Mark
- **CENTRAL INDEX KEY:** 0001639296

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-37351
- **FILM NUMBER:** 23695971

**MAIL ADDRESS:**
- **STREET 1:** 24901 DANA POINT HARBOR DRIVE
- **STREET 2:** SUITE 230
- **CITY:** DANA POINT
- **STATE:** CA
- **ZIP:** 92629
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** National Storage Affiliates Trust
- **CENTRAL INDEX KEY:** 0001618563
- **STANDARD INDUSTRIAL CLASSIFICATION:** REAL ESTATE INVESTMENT TRUSTS [6798]
- **IRS NUMBER:** 465053858
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** 8400 E. PRENTICE AVENUE
- **STREET 2:** 9TH FLOOR
- **CITY:** GREENWOOD VILLAGE
- **STATE:** CO
- **ZIP:** 80111
- **BUSINESS PHONE:** 720-630-2600

**MAIL ADDRESS:**
- **STREET 1:** 8400 E. PRENTICE AVENUE
- **STREET 2:** 9TH FLOOR
- **CITY:** GREENWOOD VILLAGE
- **STATE:** CO
- **ZIP:** 80111

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

## FORM 4

### STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

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

[ ] Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>Van Mourick Mark<br><sub>(Last) (First) (Middle)</sub><br>C/O NATIONAL STORAGE AFFILIATES TRUST<br>8400 EAST PRENTICE AVENUE, 9TH FLOOR<br><sub>(Street)</sub><br>GREENWOOD VILLAGE, CO 80111<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2023-02-27 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[X] Director [ ] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>National Storage Affiliates Trust [ NSA ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[X] Form filed by One Reporting Person<br>[ ] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | 3. Transaction Code (V) | 3. Transaction Code (V) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | Code | V | Amount | (A) or (D) | Price | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
|  |  |  |  |  |  |  |  |  |  |  |

---

## Table II - Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | 4. Transaction Code (V) | 4. Transaction Code (V) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 6. Date Exercisable and Expiration Date | 6. Date Exercisable and Expiration Date | 7. Title and Amount of Underlying Securities | 7. Title and Amount of Underlying Securities | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | Code | V | (A) | (D) | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| Class B OP Units, Series OV<sup>(1)</sup> | <sup>(1)(2)</sup> | 2023-02-27 |  | M |  |  | 32796<sup>(2)</sup> | <sup>(1)(2)(3)</sup> | <sup>(4)</sup> | Class A OP Units | 32796.0<sup>(5)(6)</sup> | $0 | 0<sup>(5)(6)</sup> | I | See Footnote<sup>(3)</sup> |
| Class A OP Units<sup>(1)</sup> | <sup>(2)</sup> | 2023-02-27 |  | M |  | 95036<sup>(2)</sup> |  | <sup>(3)</sup> | <sup>(4)</sup> | Common shares of beneficial interest, $0.01 par value | 95036.0<sup>(5)(6)</sup> | $0 | 254185<sup>(5)(6)</sup> | I | See Footnote<sup>(3)</sup> |

---

### Footnotes:

(1) Pursuant to the agreement of limited partnership of NSA OP, LP (the "Partnership"), following a two-year lock-out period, a holder of Class B common units of limited partner interest, Series OV ("Class B OP Units") may elect a voluntary conversion ("Voluntary Conversion") upon the achievement of certain performance thresholds relating to the properties to which such Class B OP Units relate one time each year prior to December 1st to convert a pre-determined portion of Class B OP Units into Class A common units of limited partner interest ("Class A OP Units") in the Partnership.

(2) Such Voluntary Conversion is effective January 1st of the following year with each Class B OP Unit being converted into the number of Class A OP Units determined by dividing the average cash available for distribution per unit on the series of specific Class B OP Units over the one-year period prior to the conversion effective date by 110% of the cash available for distribution per unit on the Class A OP Units determined over the same period.

(3) The Reporting Person made an election prior to December 1, 2022 with respect to a Voluntary Conversion of 32,796 Class B OP Units held by Van Mourick Diversified LP for the which the Reporting Person has or shares voting and investment power. Following the completion of the audit of National Storage Affiliates Trust (the "Issuer"), the Issuer notified the Reporting Person on February 27, 2023 that such Class B OP Units converted into 95,036 Class A OP Units effective January 1, 2023. The Reporting Person has the right to cause the Partnership to redeem all or a portion of the Reporting Person's Class A OP Units for cash in an amount equal to the market value of an equivalent number of the common shares of beneficial interest ("Shares") of Issuer, or at the Issuer's option, Shares on a one-for-one basis, subject to certain adjustments.

(4) N/A.

(5) The Reporting Person owns no Class B OP Units following the reported transaction above. The Reporting Person's total direct and indirect beneficial ownership of Class A OP Units following the reported transactions above is 254,185, which includes those Class A OP Units previously reported and the Class A OP Units reported herein (together with those securities convertible into, or exchangeable for, such Class A OP Units as specified therein).

(6) 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.

**Signature:** Mark Van Mourick, by Jason Parsont, his Attorney-in-fact  
**Date:** 2023-03-01

### Remarks:

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).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

**Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.**