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 OF SECURITIES
                                                                                  
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
                      

1. Name and Address of Reporting Person *

MASTANDREA JAMES C
2. Issuer Name and Ticker or Trading Symbol

Whitestone REIT [ WSR ]
5. Relationship of Reporting Person(s) to Issuer (Check all applicable)

__X__ Director                    _____ 10% Owner
__X__ Officer (give title below)    _____ Other (specify below)
CHAIRMAN & CEO
(Last)          (First)          (Middle)

2600 SOUTH GESSNER, SUITE 500
3. Date of Earliest Transaction (MM/DD/YYYY)

7/31/2021
(Street)

HOUSTON, TX 77063
(City)        (State)        (Zip)
4. If Amendment, Date Original Filed (MM/DD/YYYY)

 
6. Individual or Joint/Group Filing (Check Applicable Line)

_X _ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)
2. Trans. Date 2A. Deemed Execution Date, if any 3. Trans. 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         1526512 D  
Common Shares         126431 I By L.P. (1)
Common Shares 7/31/2021  F  1522 (2)D$8.85 (3)293572 (4)I By Spouse 

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 3)
2. Conversion or Exercise Price of Derivative Security3. Trans. Date3A. Deemed Execution Date, if any4. Trans. Code
(Instr. 8)
5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)
6. Date Exercisable and Expiration Date7. Title and Amount of Securities Underlying Derivative Security
(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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares

Explanation of Responses:
(1) Represents common shares held by Midwest Development Venture IV, an Illinois limited partnership ("Midwest"). Mr. Mastandrea owns both a limited partner interest in Midwest and 100% of the equity of the general partner of Midwest. As a result, Mr. Mastandrea may be deemed to be the beneficial owner of the common shares held by Midwest. Mr. Mastandrea disclaims beneficial ownership in the common shares held by Midwest except to the extent of his pecuniary interest therein and the inclusion of these common shares in this report shall not be deemed an admission of beneficial ownership of all of the reported common shares for purposes of Section 16 or for any other purpose.
(2) Represents common shares withheld by the Company to satisfy tax withholding obligations in connection with the vesting of certain restricted units previously granted pursuant to the Company's 2018 Long-Term Equity Incentive Ownership Plan.
(3) Per Share value assigned by the Company to the tax withholding shares based on the closing sales price of the common shares on July 30, 2021.
(4) The reporting person disclaims beneficial ownership of these securities except to the extent of his pecuniary interest therein, and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of all of the reported shares for purposes of Section 16 or for any other purpose.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director10% OwnerOfficerOther
MASTANDREA JAMES C
2600 SOUTH GESSNER, SUITE 500
HOUSTON, TX 77063
X
CHAIRMAN & CEO

Signatures
/s/David K. Holeman, Attorney-in-Fact for James C. Mastandrea8/2/2021
**Signature of Reporting PersonDate

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