As of September 29, 2026, Halozyme Therapeutics's top three insider holders are Helen Torley (President And Ceo, 767.78K shares), Connie Matsui (Director, 188.19K shares), Connie Matsui (Director, 183.03K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Helen Torley | President And Ceo | 767,780 | 0 | 767,780 | 37.7% | 11 Sep, 2026 |
| 2 | Connie Matsui | Director | 371,224 | 0 | 371,224 | 18.2% | 03 Dec, 2024 |
| 3 | Matthew L. Posard | Director | 194,028 | 0 | 194,028 | 9.5% | 17 Sep, 2026 |
| 4 | Michael J. Labarre | Svp, Chief Technical Officer | 173,756 | 0 | 173,756 | 8.5% | 27 Feb, 2025 |
| 5 | Jean-Pierre Bizzari | Director | 125,565 | 0 | 125,565 | 6.2% | 09 May, 2023 |
| 6 | Jeffrey William Henderson | Director | 95,617 | 0 | 95,617 | 4.7% | 07 May, 2026 |
| 7 | Bernadette Connaughton | Director | 78,637 | 0 | 78,637 | 3.9% | 11 Aug, 2026 |
| 8 | James M Daly | Director | 52,941 | 0 | 52,941 | 2.6% | 15 Aug, 2023 |
| 9 | Mark Howard Snyder | Svp, Chief Legal Officer | 49,929 | 0 | 49,929 | 2.5% | 15 Jun, 2026 |
| 10 | Nicole Labrosse | Svp, Chief Financial Officer | 38,494 | 0 | 38,494 | 1.9% | 24 Feb, 2026 |
| 11 | Akiko Moni Miyashita | Director | 31,143 | 0 | 31,143 | 1.5% | 02 May, 2025 |
| 12 | Barbara Gayle Duncan | Director | 23,715 | 0 | 23,715 | 1.2% | 07 May, 2026 |
| 13 | Mahesh Krishnan | Director | 14,462 | 0 | 14,462 | 0.7% | 30 Jun, 2026 |
| 14 | Cortney Caudill | Svp, Chief Operating Officer | 7,055 | 0 | 7,055 | 0.3% | 10 Mar, 2026 |
| 15 | James Paul Lang | Director | 5,574 | 0 | 5,574 | 0.3% | 07 May, 2026 |
| 16 | David A Ramsay | Evp, President, Drug Delivery | 4,592 | 0 | 4,592 | 0.2% | 02 Jul, 2026 |
| 17 | Dannielle Appelhans | Director | 1,161 | 0 | 1,161 | 0.1% | 02 Sep, 2026 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 16 Sep, 2026 | Matthew L. Posard | Director | Disposed S | 3,100 | $106.13 | $329.01K | 74,735 | Direct |
| 16 Sep, 2026 | Matthew L. Posard | Director | Disposed S | 3,000 | $106.83 | $320.48K | 71,735 | Direct |
| 16 Sep, 2026 | Matthew L. Posard | Director | Disposed S | 8,896 | $108.04 | $961.12K | 62,839 | Direct |
| 16 Sep, 2026 | Matthew L. Posard | Director | Disposed S | 4,000 | $108.99 | $435.96K | 58,839 | Direct |
| 09 Sep, 2026 | Helen Torley | President And Ceo | Acquired M | 20,000 | $18.41 | $368.20K | 787,780 | Direct |
| 09 Sep, 2026 | Helen Torley | President And Ceo | Disposed S | 13,304 | $107.22 | $1.43Mn | 774,476 | Direct |
| 09 Sep, 2026 | Helen Torley | President And Ceo | Disposed S | 6,596 | $107.82 | $711.19K | 767,880 | Direct |
| 09 Sep, 2026 | Helen Torley | President And Ceo | Disposed S | 100 | $108.67 | $10.87K | 767,780 | Direct |
| 10 Sep, 2026 | Helen Torley | President And Ceo | Acquired M | 20,000 | $18.41 | $368.20K | 787,780 | Direct |
| 10 Sep, 2026 | Helen Torley | President And Ceo | Disposed S | 14,588 | $107.01 | $1.56Mn | 773,192 | Direct |
| 10 Sep, 2026 | Helen Torley | President And Ceo | Disposed S | 5,412 | $107.58 | $582.23K | 767,780 | Direct |
| 11 Sep, 2026 | Helen Torley | President And Ceo | Acquired M | 20,000 | $18.41 | $368.20K | 787,780 | Direct |
| 11 Sep, 2026 | Helen Torley | President And Ceo | Disposed S | 15,492 | $107.15 | $1.66Mn | 772,288 | Direct |
| 11 Sep, 2026 | Helen Torley | President And Ceo | Disposed S | 4,508 | $107.55 | $484.83K | 767,780 | Direct |
| 09 Sep, 2026 | Helen Torley | President And Ceo | Disposed M | 20,000 | $18.41 | $368.20K | 121,552 | Direct |
| 10 Sep, 2026 | Helen Torley | President And Ceo | Disposed M | 20,000 | $18.41 | $368.20K | 101,552 | Direct |
| 11 Sep, 2026 | Helen Torley | President And Ceo | Disposed M | 20,000 | $18.41 | $368.20K | 81,552 | Direct |
| 01 Sep, 2026 | Dannielle Appelhans | Director | Acquired A | 1,161 | $0.00 | $0 | 1,161 | Direct |
| 01 Sep, 2026 | Dannielle Appelhans | Director | Acquired A | 1,778 | $0.00 | $0 | 1,778 | Direct |
| 17 Aug, 2026 | Helen Torley | President And Ceo | Acquired M | 20,000 | $18.41 | $368.20K | 787,780 | Direct |