According to recent filings covering the 90 days ending January 10, 2026, the three most significant insider holders at Halozyme Therapeutics are President And Ceo Helen Torley (708.72K shares), Director Connie Matsui (183.03K shares), Director Kenneth J Kelley (179.83K shares).
| Holder | Position | Shares | Report Date |
|---|---|---|---|
| Helen Torley | President And Ceo | 708,719 | 01 Dec, 2025 |
| Connie Matsui | 183,035 | 03 Dec, 2024 | |
| Kenneth J Kelley | 179,833 | 14 Apr, 2021 | |
| Michael J. Labarre | Svp And Chief Technical Officer | 173,756 | 27 Feb, 2025 |
| Matthew L. Posard | 74,039 | 02 May, 2025 | |
| Jean-Pierre Bizzari | 66,815 | 09 May, 2023 | |
| Bernadette Connaughton | 40,123 | 06 Jan, 2026 | |
| Mark Howard Snyder | Svp And Chief Legal Officer | 34,181 | 06 Jan, 2026 |
| Jeffrey William Henderson | 32,776 | 02 May, 2025 | |
| Akiko Moni Miyashita | 24,937 | 02 May, 2025 | |
| Nicole Labrosse | Svp And Chief Financial Officer | 22,079 | 23 Sep, 2025 |
| James M Daly | 20,503 | 15 Aug, 2023 | |
| Masaru Matsuda | Svp And General Counsel | 20,049 | 07 Sep, 2021 |
| Barbara Gayle Duncan | 19,919 | 02 May, 2025 | |
| Elaine D Sun | Svp And Chief Financial Officer | 14,018 | 01 Apr, 2021 |
| Cortney Caudill | Svp And Chief Operating Officer | 12,737 | 19 Dec, 2025 |
| Mahesh Krishnan | 10,666 | 02 May, 2025 | |
| James Paul Lang | 889 | 06 Jan, 2026 |
* 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 |
|---|---|---|---|---|---|---|---|---|
| 05 Jan, 2026 | Bernadette Connaughton | Common Stock | D | 2,000 | $70.25 | 40,123 | D | S |
| 03 Jan, 2026 | Mark Howard Snyder | Common Stock | D | 4,243 | $70.31 | 34,181 | D | F |
| 03 Jan, 2026 | Mark Howard Snyder | Common Stock | A | 7,611 | $0.00 | 38,424 | D | M |
| 02 Jan, 2026 | James Paul Lang | Restricted Stock Units | A | 889 | $0.00 | 889 | D | A |
| 01 Dec, 2025 | Helen Torley | - | - | 708,980 | D | |||
| 01 Dec, 2025 | Helen Torley | Common Stock | D | 261 | $71.60 | 708,719 | D | S |
| 01 Dec, 2025 | Helen Torley | Common Stock | D | 10,406 | $68.51 | 714,882 | D | S |
| 01 Dec, 2025 | Helen Torley | - | - | 709,480 | D | |||
| 01 Dec, 2025 | Helen Torley | Common Stock | A | 16,569 | $8.11 | 725,288 | D | M |
| 01 Dec, 2025 | Helen Torley | Common Stock | D | 5,402 | $69.44 | 709,480 | D | S |
| 01 Dec, 2025 | Helen Torley | Common Stock | D | 500 | $70.36 | 708,980 | D | S |
| 01 Dec, 2025 | Bernadette Connaughton | Common Stock | D | 829 | $71.60 | 42,123 | D | S |
| 26 Nov, 2025 | Helen Torley | Common Stock | D | 25,000 | $0.00 | 708,719 | D | G |
| 12 Nov, 2025 | Helen Torley | Common Stock | D | 498 | $71.67 | 733,719 | D | S |
| 12 Nov, 2025 | Helen Torley | Common Stock | D | 6,784 | $71.09 | 734,217 | D | S |
| 12 Nov, 2025 | Helen Torley | - | - | 741,001 | D | |||
| 12 Nov, 2025 | Helen Torley | - | - | 753,719 | D | |||
| 12 Nov, 2025 | Helen Torley | - | - | 733,719 | D | |||
| 12 Nov, 2025 | Helen Torley | - | - | 734,217 | D | |||
| 12 Nov, 2025 | Helen Torley | Common Stock | D | 12,718 | $70.22 | 741,001 | D | S |