Whitestone REIT COO granted 18,525 share units

Mastandrea Christine J reported acquisition or exercise transactions in this Form 4 filing.

Rhea-AI Filing Summary

Mastandrea Christine J reported acquisition or exercise transactions in this Form 4 filing.

Whitestone REIT President and COO Christine J. Mastandrea received an equity award of 18,525 restricted common share units on April 1, 2026 under the company’s 2018 Long-Term Equity Incentive Ownership Plan. After this grant, she directly holds 481,454 common shares of Whitestone REIT.

Insider Trade Summary

Grant/Award: 18,525 shares

Grant/Award 1 txn

Insider Mastandrea Christine J

Role President and COO

Type	Security	Shares	Price	Value
Grant/Award	Common Shares	18,525	$0.00	$0.00

Holdings After Transaction: Common Shares — 481,454 shares (Direct)

Footnotes (1)

1. F1. Represents restricted common share units granted pursuant to the Company's 2018 Long-Term Equity Incentive Ownership Plan.

Key Figures

Equity award size: 18,525 shares Post-transaction holdings: 481,454 shares Grant price per unit: $0.0000 per share +1 more

4 metrics

Equity award size 18,525 shares Restricted common share units granted on April 1, 2026

Post-transaction holdings 481,454 shares Total common shares directly held after award

Grant price per unit $0.0000 per share Indicates non-cash restricted share unit grant

Transaction code A Grant, award, or other acquisition of securities

Key Terms

restricted common share units, 2018 Long-Term Equity Incentive Ownership Plan, Form 4

3 terms

restricted common share units financial

"Represents restricted common share units granted pursuant to the Company's 2018 Long-Term Equity Incentive Ownership Plan."

2018 Long-Term Equity Incentive Ownership Plan financial

"granted pursuant to the Company's 2018 Long-Term Equity Incentive Ownership Plan."

Form 4 regulatory

"INSIDER FILING DATA (Form 4):"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What did Whitestone REIT (WSR) disclose in this Form 4 filing?

Whitestone REIT disclosed that President and COO Christine J. Mastandrea received 18,525 restricted common share units as an equity award. The grant was made under the company’s 2018 Long-Term Equity Incentive Ownership Plan and increased her total direct holdings to 481,454 common shares.

How many Whitestone REIT (WSR) shares did Christine J. Mastandrea acquire?

Christine J. Mastandrea acquired 18,525 restricted common share units of Whitestone REIT. These are equity awards rather than open-market purchases, and they were granted at no cash cost per unit as part of the company’s long-term incentive compensation program.

What are Christine J. Mastandrea’s total Whitestone REIT (WSR) holdings after this grant?

After the grant, Christine J. Mastandrea directly holds 481,454 common shares of Whitestone REIT. This total includes the newly awarded 18,525 restricted common share units, reflecting her ongoing equity-based compensation as President and COO of the company.

Was the Whitestone REIT (WSR) Form 4 transaction an open-market stock purchase?

No, the transaction was not an open-market purchase. The Form 4 shows a grant of 18,525 restricted common share units at a price of $0.0000 per share, indicating an equity award under Whitestone REIT’s 2018 Long-Term Equity Incentive Ownership Plan, not a cash purchase.

Under which plan were the Whitestone REIT (WSR) restricted share units granted?

The restricted common share units were granted under Whitestone REIT’s 2018 Long-Term Equity Incentive Ownership Plan. This plan provides long-term equity awards to key executives, aligning their compensation with shareholder interests through stock-based incentives over time.

What does the transaction code “A” mean in Whitestone REIT (WSR) Form 4?

In this Form 4, transaction code “A” indicates a grant, award or other acquisition of securities. Here it represents 18,525 restricted common share units awarded to President and COO Christine J. Mastandrea as part of her long-term equity compensation, not a market trade.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 04/06/2026 - 05:37 PM EDT Learn about SEC filing dates

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

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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 TEXAS 77063

(City) (State) (Zip)

UNITED STATES

(Country)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
04/01/2026

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

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

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

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	04/01/2026		A		18,525(1)	A	$0	481,454	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 share units granted pursuant to the Company's 2018 Long-Term Equity Incentive Ownership Plan.

	/s/ David K. Holeman Attorney-in Fact for Christine J. Mastandrea	04/06/2026
	** 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.
* Form 4: SEC 1474 (03-26)