Whitestone REIT (WSR) Insider Ownership

Historic Insider Ownership Trends

Based on data from the past 90 days ending February 19, 2026, Whitestone REIT's three largest insider shareholders are President And Coo Christine J Mastandrea (1.74Mn shares), Director James C Mastandrea (1.57Mn shares), Chief Executive Officer David K Holeman (807.36K shares).

Top Direct Holders

Insider ownership data is derived from the last 60 months of Form 4 SEC filings.
Holder Position Shares Report Date
Christine J Mastandrea President And Coo 1,738,084 06 Jan, 2026
James C Mastandrea 1,571,127 20 Jan, 2022
David K Holeman Chief Executive Officer 807,362 06 Jan, 2026
Bradford D Johnson Evp Acquisitions & Asset Mgmt 293,309 01 Jul, 2021
John J Dee Coo & Secretary 251,298 02 Aug, 2021
John Scott Hogan Chief Financial Officer 228,170 06 Jan, 2026
Peter Tropoli General Counsel & Secretary 170,335 06 Jan, 2026
Soklin Siv Vp Of Human Resources 98,744 06 Jan, 2026
Paul T Lambert 82,090 20 Dec, 2022
Amy Shih-Hua Feng 69,507 29 Dec, 2025
Jack L Mahaffey 63,584 15 Dec, 2021
Jeffrey Alan Jones 39,478 29 Dec, 2025
Nandita Berry 36,129 21 Dec, 2023
David F. Taylor 34,536 21 Dec, 2023
Donald A Miller 33,694 29 Dec, 2025
Julia Bruns Buthman 31,577 29 Dec, 2025
Kristian M Gathright 15,789 29 Dec, 2025

* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.

Recent Insider Transactions

Detailed insider trading activity based on Form 4 SEC filings.
Download Data
Transaction Date Insider Name Security Class Transaction Type Shares Traded Price Shares Remaining Ownership Code
02 Jan, 2026 Peter Tropoli Common Shares D 15,455 $13.89 170,335 D F
02 Jan, 2026 Peter Tropoli Common Shares A 38,314 $0.00 185,790 D A
02 Jan, 2026 David K Holeman Common Shares D 35,081 $13.89 807,362 D F
02 Jan, 2026 David K Holeman Common Shares A 87,576 $0.00 842,443 D A
02 Jan, 2026 Christine J Mastandrea Common Shares A 51,998 $0.00 462,929 D A
02 Jan, 2026 John Scott Hogan Common Shares A 38,314 $0.00 243,699 D A
02 Jan, 2026 John Scott Hogan Common Shares D 15,529 $13.89 228,170 D F
02 Jan, 2026 Soklin Siv Common Shares D 6,521 $13.89 98,744 D F
02 Jan, 2026 Soklin Siv Common Shares A 24,084 $0.00 105,265 D A
24 Dec, 2025 Kristian M Gathright Common Shares A 12,286 $13.70 15,789 D A
24 Dec, 2025 Donald A Miller - - 33,694 D
24 Dec, 2025 Donald A Miller Common Shares A 11,986 $13.70 33,694 D A
24 Dec, 2025 Jeffrey Alan Jones Common Shares A 6,368 $13.70 39,478 D A
24 Dec, 2025 Amy Shih-Hua Feng Common Shares A 15,282 $13.70 69,507 D A
24 Dec, 2025 Julia Bruns Buthman Common Shares A 12,660 $13.70 31,577 D A
30 Jun, 2025 Peter Tropoli Common Shares D 6,042 $12.48 147,476 D F
30 Jun, 2025 Peter Tropoli Common Shares A 16,768 $0.00 153,518 D A
30 Jun, 2025 David K Holeman Common Shares D 12,865 $12.48 754,867 D F
30 Jun, 2025 David K Holeman Common Shares A 30,201 $0.00 767,732 D A
30 Jun, 2025 Christine J Mastandrea Common Shares A 23,323 $0.00 417,401 D A