As of April 25, 2026, Whitestone REIT's top three insider holders are James C Mastandrea (Chairman Ceo, 1.28Mn shares), Christine J Mastandrea (Evp Corporate Strategy, 1.28Mn shares), David K Holeman (Chief Executive Officer, 831.39K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| James C Mastandrea | Chairman Ceo | 1,275,155 | 0 | 20 Jan, 2022 |
| Christine J Mastandrea | Evp Corporate Strategy | 0 | 1,275,155 | 20 Jan, 2022 |
| David K Holeman | Chief Executive Officer | 831,394 | 0 | 06 Apr, 2026 |
| Christine J Mastandrea | President And Coo | 481,454 | 0 | 06 Apr, 2026 |
| James C Mastandrea | Chairman Ceo | 0 | 293,572 | 02 Aug, 2021 |
| Bradford D Johnson | Evp Acquisitions Asset Mgmt | 293,309 | 0 | 01 Jul, 2021 |
| John J Dee | Coo Secretary | 251,298 | 0 | 02 Aug, 2021 |
| John Scott Hogan | Chief Financial Officer | 242,189 | 0 | 06 Apr, 2026 |
| Peter Tropoli | General Counsel Secretary | 183,770 | 0 | 06 Apr, 2026 |
| Soklin Siv | Vp Of Human Resources | 105,740 | 0 | 06 Apr, 2026 |
| Paul T Lambert | - | 82,090 | 0 | 20 Dec, 2022 |
| Amy Shih-Hua Feng | - | 69,507 | 0 | 29 Dec, 2025 |
| Jack L Mahaffey | - | 63,584 | 0 | 15 Dec, 2021 |
| Jeffrey Alan Jones | - | 39,478 | 0 | 29 Dec, 2025 |
| Nandita Berry | - | 36,129 | 0 | 21 Dec, 2023 |
| David F. Taylor | - | 34,536 | 0 | 21 Dec, 2023 |
| Donald A Miller | - | 33,694 | 0 | 29 Dec, 2025 |
| Julia Bruns Buthman | - | 31,577 | 0 | 29 Dec, 2025 |
| Kristian M Gathright | - | 15,789 | 0 | 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.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 01 Apr, 2026 | David K Holeman | Common Shares | A | 24,032 | $0.00 | 831,394 | D | A |
| 01 Apr, 2026 | Christine J Mastandrea | Common Shares | A | 18,525 | $0.00 | 481,454 | D | A |
| 01 Apr, 2026 | John Scott Hogan | Common Shares | A | 14,019 | $0.00 | 242,189 | D | A |
| 01 Apr, 2026 | Soklin Siv | Common Shares | A | 6,996 | $0.00 | 105,740 | D | A |
| 01 Apr, 2026 | Peter Tropoli | Common Shares | A | 13,435 | $0.00 | 183,770 | D | A |
| 02 Jan, 2026 | Soklin Siv | Common Shares | A | 24,084 | $0.00 | 105,265 | D | A |
| 02 Jan, 2026 | John Scott Hogan | Common Shares | A | 38,314 | $0.00 | 243,699 | D | A |
| 02 Jan, 2026 | Peter Tropoli | Common Shares | A | 38,314 | $0.00 | 185,790 | D | A |
| 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 | D | 15,529 | $13.89 | 228,170 | D | F |
| 02 Jan, 2026 | David K Holeman | Common Shares | D | 35,081 | $13.89 | 807,362 | D | F |
| 02 Jan, 2026 | Peter Tropoli | Common Shares | D | 15,455 | $13.89 | 170,335 | D | F |
| 02 Jan, 2026 | Soklin Siv | Common Shares | D | 6,521 | $13.89 | 98,744 | D | F |
| 24 Dec, 2025 | Amy Shih-Hua Feng | Common Shares | A | 15,282 | $13.70 | 69,507 | D | A |
| 24 Dec, 2025 | Jeffrey Alan Jones | Common Shares | A | 6,368 | $13.70 | 39,478 | D | A |
| 24 Dec, 2025 | Kristian M Gathright | Common Shares | A | 12,286 | $13.70 | 15,789 | D | A |
| 24 Dec, 2025 | Julia Bruns Buthman | Common Shares | A | 12,660 | $13.70 | 31,577 | D | A |
| 24 Dec, 2025 | Donald A Miller | Common Shares | A | 11,986 | $13.70 | 33,694 | D | A |
| 30 Jun, 2025 | Soklin Siv | Common Shares | A | 8,780 | $0.00 | 85,648 | D | A |