According to recent filings covering the 90 days ending February 07, 2026, the three most significant insider holders at Zentalis Pharmaceuticals are TenPercentOwner Group Walters (13.51Mn shares), TenPercentOwner Capital Management Company, Lp Matrix (6.46Mn shares), President & Ceo Anthony Y Sun (1.28Mn shares).
| Holder | Position | Shares | Report Date |
|---|---|---|---|
| Group Walters | 13,509,973 | 08 Jan, 2026 | |
| Capital Management Company, Lp Matrix | 6,459,973 | 15 Dec, 2025 | |
| Anthony Y Sun | President & Ceo | 1,279,239 | 05 Apr, 2022 |
| Andrea Paul | Chief Legal Officer | 1,070,784 | 05 Feb, 2025 |
| Kevin D. Bunker | Chief Scientific Officer | 849,931 | 21 Dec, 2023 |
| Cam Gallagher | President And Interim Cfo | 633,680 | 31 May, 2024 |
| Mark Lackner | Chief Scientific Officer | 512,856 | 05 Feb, 2025 |
| Kimberly Blackwell | Chief Executive Officer | 484,145 | 05 Feb, 2024 |
| Melissa B, Epperly | Chief Financial Officer | 451,449 | 12 Feb, 2024 |
| Diana Hausman | Chief Medical Officer | 373,876 | 09 May, 2024 |
| Scott Dunseth Myers | 338,795 | 18 Jun, 2025 | |
| David Michael Johnson | 250,421 | 18 Jun, 2025 | |
| Jan Skvarka | 207,154 | 18 Jun, 2025 | |
| Vincent Vultaggio | Pao And Pfo | 186,730 | 04 Feb, 2026 |
| Luke Nathaniel Walker | 144,284 | 18 Jun, 2025 | |
| Enoch Kariuki | 137,365 | 18 Jun, 2025 | |
| Carrie Brownstein | Chief Medical Officer | 105,685 | 06 Oct, 2023 |
| Julia Marie Eastland | Ceo & President | 87,888 | 05 Feb, 2025 |
| Iris Roth | Chief Operating Officer | 52,500 | 02 Mar, 2023 |
| Ingmar Bruns | Chief Medical Officer | 36,629 | 12 Feb, 2025 |
| Alexis Pinto | Chief Legal Officer | 22,240 | 14 Feb, 2022 |
| Dimitris Voliotis | Svp And Clinical Development | 15,978 | 14 Feb, 2022 |
* 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 |
|---|---|---|---|---|---|---|---|---|
| 03 Feb, 2026 | Vincent Vultaggio | Common Stock | D | 556 | $2.52 | 186,730 | D | S |
| 02 Feb, 2026 | Vincent Vultaggio | Common Stock | D | 2,540 | $2.55 | 187,286 | D | S |
| 31 Dec, 2025 | Group Walters | Common Stock | A | 6,459,973 | $1.20 | 13,509,973 | D | P |
| 31 Dec, 2025 | Group Walters | - | - | 13,509,973 | D | |||
| 15 Dec, 2025 | Capital Management Company, Lp Matrix | Common Stock, par value $0.001 per share | D | 7,500,000 | $1.33 | 6,459,973 | I | S |
| 15 Dec, 2025 | Capital Management Company, Lp Matrix | - | - | 6,459,973 | I | |||
| 17 Jun, 2025 | Scott Dunseth Myers | Common Stock | A | 57,603 | $0.00 | 338,795 | D | A |
| 17 Jun, 2025 | Luke Nathaniel Walker | Common Stock | A | 57,603 | $0.00 | 144,284 | D | A |
| 17 Jun, 2025 | David Michael Johnson | Common Stock | A | 57,603 | $0.00 | 250,421 | D | A |
| 17 Jun, 2025 | Jan Skvarka | Common Stock | A | 57,603 | $0.00 | 207,154 | D | A |
| 17 Jun, 2025 | Enoch Kariuki | - | - | 137,365 | D | |||
| 17 Jun, 2025 | Enoch Kariuki | Common Stock | A | 57,603 | $0.00 | 137,365 | D | A |
| 30 Apr, 2025 | Scott Dunseth Myers | Common Stock | A | 21,000 | $1.40 | 281,192 | D | P |
| 30 Apr, 2025 | Scott Dunseth Myers | - | - | 281,192 | D | |||
| 06 Feb, 2025 | Ingmar Bruns | Common Stock | A | 20,000 | $2.28 | 36,629 | D | P |
| 03 Feb, 2025 | Julia Marie Eastland | Common Stock | A | 59,388 | $0.00 | 87,888 | D | A |
| 03 Feb, 2025 | Mark Lackner | Common Stock | D | 14,368 | $1.71 | 512,856 | D | S |
| 03 Feb, 2025 | Mark Lackner | Common Stock | A | 335,907 | $0.00 | 527,224 | D | A |
| 03 Feb, 2025 | Mark Lackner | - | - | 512,856 | D | |||
| 03 Feb, 2025 | Ingmar Bruns | - | - | 16,629 | D |