Whitestone REIT (WSR) officer granted 51,998 restricted shares

Rhea-AI Filing Summary

Whitestone REIT reported that its President and COO acquired 51,998 restricted common shares on 01/02/2026. These shares were issued at a price of $0 upon vesting of performance-based restricted stock units granted in 2023 under the company’s 2018 Long-Term Equity Incentive Ownership Plan.

The award vested at 200% of the target level because Whitestone REIT achieved a #1 peer group ranking for total shareholder return for the performance period from January 1, 2023 through December 31, 2025. Following this transaction, the officer beneficially owns 462,929 common shares, held directly.

SEC Form 4

FORM 4

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
or Section 30(h) of the Investment Company Act of 1940

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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^*

Mastandrea Christine J

(Last) (First) (Middle)

2600 SOUTH GESSNER

SUITE 500

(Street)

HOUSTON TX 77063

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Whitestone REIT [ WSR ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	President and COO

3. Date of Earliest Transaction (Month/Day/Year)
01/02/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

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. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	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	01/02/2026		A		51,998(1)	A	$0	462,929	D

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 (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	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 (Month/Day/Year)		7. 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: 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

Explanation of Responses:

1. Represents restricted common shares issued upon vesting of performance based restricted stock units granted in 2023 under the Company's 2018 Long-Term Equity Incentive Ownership Plan, which vested at 200% of target based on the Company's #1 peer group ranking for total shareholder return for the performance period from January 1, 2023 through December 31, 2025.

	/s/ David K. Holeman Attorney-in Fact for Christine J. Mastandrea	01/06/2026
	** Signature of Reporting Person	Date
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.

FAQ

What insider transaction did Whitestone REIT (WSR) report in this filing?

The filing reports that the President and COO acquired 51,998 restricted common shares of Whitestone REIT on 01/02/2026, issued at a price of $0 upon vesting of performance-based restricted stock units.

Who is the reporting person in the Whitestone REIT (WSR) Form 4 and what is their role?

The reporting person is an officer of Whitestone REIT, serving as President and COO, and the form is filed for one reporting person.

How many Whitestone REIT shares does the officer own after this transaction?

After the reported transaction, the officer beneficially owns 462,929 common shares of Whitestone REIT, held in direct ownership.

What performance conditions caused the Whitestone REIT restricted stock units to vest?

The restricted stock units vested at 200% of target based on Whitestone REIT’s #1 peer group ranking for total shareholder return for the period from January 1, 2023 through December 31, 2025.

Were the Whitestone REIT shares purchased on the open market?

No. The 51,998 Whitestone REIT common shares were issued as restricted stock at $0 upon vesting of performance-based restricted stock units granted in 2023 under the 2018 Long-Term Equity Incentive Ownership Plan.

What equity plan governed the Whitestone REIT (WSR) share award in this Form 4?

The restricted common shares were issued under Whitestone REIT’s 2018 Long-Term Equity Incentive Ownership Plan, following the vesting of performance-based restricted stock units granted in 2023.