Halozyme Therapeutics's three largest insider shareholders as of August 29, 2026 are Helen Torley (President And Ceo, 767.78K shares), Helen Torley (President And Ceo, 767.78K shares), Connie Matsui (Director, 188.19K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Helen Torley | President And Ceo | 767,780 | 0 | 767,780 | 38.1% | 19 Aug, 2026 |
| 2 | Connie Matsui | Director | 371,224 | 0 | 371,224 | 18.4% | 03 Dec, 2024 |
| 3 | Matthew L. Posard | Director | 213,024 | 0 | 213,024 | 10.6% | 07 May, 2026 |
| 4 | Michael J. Labarre | Svp, Chief Technical Officer | 173,756 | 0 | 173,756 | 8.6% | 27 Feb, 2025 |
| 5 | Jean-Pierre Bizzari | Director | 125,565 | 0 | 125,565 | 6.2% | 09 May, 2023 |
| 6 | Bernadette Connaughton | Director | 78,637 | 0 | 78,637 | 3.9% | 11 Aug, 2026 |
| 7 | James M Daly | Director | 52,941 | 0 | 52,941 | 2.6% | 15 Aug, 2023 |
| 8 | Mark Howard Snyder | Svp, Chief Legal Officer | 49,929 | 0 | 49,929 | 2.5% | 15 Jun, 2026 |
| 9 | Nicole Labrosse | Svp, Chief Financial Officer | 38,494 | 0 | 38,494 | 1.9% | 24 Feb, 2026 |
| 10 | Jeffrey William Henderson | Director | 36,572 | 0 | 36,572 | 1.8% | 07 May, 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 | Masaru Matsuda | Svp, General Counsel | 20,049 | 0 | 20,049 | 1.0% | 07 Sep, 2021 |
| 14 | Mahesh Krishnan | Director | 14,462 | 0 | 14,462 | 0.7% | 30 Jun, 2026 |
| 15 | Cortney Caudill | Svp, Chief Operating Officer | 7,055 | 0 | 7,055 | 0.4% | 10 Mar, 2026 |
| 16 | James Paul Lang | Director | 5,574 | 0 | 5,574 | 0.3% | 07 May, 2026 |
| 17 | David A Ramsay | Evp, President, Drug Delivery | 4,592 | 0 | 4,592 | 0.2% | 02 Jul, 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 |
|---|---|---|---|---|---|---|---|---|
| 17 Aug, 2026 | Helen Torley | President And Ceo | Acquired M | 20,000 | $18.41 | $368.20K | 787,780 | Direct |
| 17 Aug, 2026 | Helen Torley | President And Ceo | Disposed S | 900 | $98.96 | $89.06K | 786,880 | Direct |
| 17 Aug, 2026 | Helen Torley | President And Ceo | Disposed S | 500 | $100.46 | $50.23K | 786,380 | Direct |
| 17 Aug, 2026 | Helen Torley | President And Ceo | Disposed S | 2,100 | $101.77 | $213.71K | 784,280 | Direct |
| 17 Aug, 2026 | Helen Torley | President And Ceo | Disposed S | 9,000 | $102.55 | $922.98K | 775,280 | Direct |
| 17 Aug, 2026 | Helen Torley | President And Ceo | Disposed S | 7,500 | $103.48 | $776.12K | 767,780 | Direct |
| 18 Aug, 2026 | Helen Torley | President And Ceo | Acquired M | 20,000 | $18.41 | $368.20K | 787,780 | Direct |
| 18 Aug, 2026 | Helen Torley | President And Ceo | Disposed S | 5,703 | $103.08 | $587.88K | 782,077 | Direct |
| 18 Aug, 2026 | Helen Torley | President And Ceo | Disposed S | 4,897 | $104.11 | $509.83K | 777,180 | Direct |
| 18 Aug, 2026 | Helen Torley | President And Ceo | Disposed S | 9,400 | $104.87 | $985.82K | 767,780 | Direct |
| 19 Aug, 2026 | Helen Torley | President And Ceo | Acquired M | 20,000 | $18.41 | $368.20K | 787,780 | Direct |
| 19 Aug, 2026 | Helen Torley | President And Ceo | Disposed S | 7,200 | $106.36 | $765.78K | 780,580 | Direct |
| 19 Aug, 2026 | Helen Torley | President And Ceo | Disposed S | 9,600 | $107.22 | $1.03Mn | 770,980 | Direct |
| 19 Aug, 2026 | Helen Torley | President And Ceo | Disposed S | 3,200 | $107.77 | $344.85K | 767,780 | Direct |
| 17 Aug, 2026 | Helen Torley | President And Ceo | Disposed M | 20,000 | $18.41 | $368.20K | 181,552 | Direct |
| 18 Aug, 2026 | Helen Torley | President And Ceo | Disposed M | 20,000 | $18.41 | $368.20K | 161,552 | Direct |
| 19 Aug, 2026 | Helen Torley | President And Ceo | Disposed M | 20,000 | $18.41 | $368.20K | 141,552 | Direct |
| 10 Aug, 2026 | Bernadette Connaughton | Director | Disposed S | 1,626 | $102.80 | $167.15K | 40,418 | Direct |
| 08 Jul, 2026 | Helen Torley | President And Ceo | Acquired M | 1,923 | $12.07 | $23.21K | 769,703 | Direct |
| 08 Jul, 2026 | Helen Torley | President And Ceo | Disposed S | 888 | $79.28 | $70.40K | 768,815 | Direct |