HALO · Halozyme Therapeutics Inc. Common Stock
View on chartInsiders & Stakes
| Helen Torley President and CEO | ▼ Sell | Open Market | 767,780 Shares held | 8/19/2026 | View profile |
| Connie Matsui | ▼ Sell | Gift | 183,035 Shares held | 11/29/2024 | View profile |
| LaBarre Michael J. SVP, Chief Technical Officer | ▼ Sell | Open Market | 173,756 Shares held | 2/27/2025 | View profile |
| Matthew L. Posard Director | ▲ Buy | Grant | 77,835 Shares held | 5/5/2026 | View profile |
| Jean-Pierre Bizzari Director | ▲ Buy | Grant | 66,815 Shares held | 5/5/2023 | View profile |
| Mark Howard Snyder SVP, GENERAL COUNSEL | ▼ Sell | Tax Withholding | 49,929 Shares held | 6/12/2026 | View profile |
| Bernadette Connaughton Director | ▼ Sell | Open Market | 40,418 Shares held | 8/10/2026 | View profile |
| Nicole LaBrosse SVP, Chief Financial Officer | ▼ Sell | Tax Withholding | 38,494 Shares held | 2/23/2026 | View profile |
| Jeffrey William Henderson Director | ▲ Buy | Grant | 36,572 Shares held | 5/5/2026 | View profile |
| Miyashita Akiko Moni Director | ▲ Buy | Grant | 24,937 Shares held | 5/1/2025 | View profile |
| Barbara Gayle Duncan Director | ▲ Buy | Grant | 23,715 Shares held | 5/5/2026 | View profile |
| James M. Daly Director | ▼ Sell | Open Market | 20,503 Shares held | 8/14/2023 | View profile |
| Masaru Matsuda SVP and General Counsel | ▼ Sell | Tax Withholding | 20,049 Shares held | 9/4/2021 | View profile |
| Mahesh Krishnan Director | ▼ Sell | Open Market | 14,462 Shares held | 6/29/2026 | View profile |
| Cortney Caudill SVP, CHIEF OPERATING OFFICER | ▼ Sell | Open Market | 7,055 Shares held | 3/10/2026 | View profile |
| James Paul Lang Director | ▲ Buy | Grant | 4,685 Shares held | 5/5/2026 | View profile |
| David A. Ramsay | ▼ Sell | Tax Withholding | 4,592 Shares held | 6/30/2026 | View profile |
Transaction History
| Helen Torley | ▲ Buy | Option Exercise | 20,000 | $368K | 8/19/2026 |
| Helen Torley | ▼ Sell | Open Market | 7,200 | $766K | 8/19/2026 |
| Helen Torley | ▼ Sell | Open Market | 9,600 | $1.0M | 8/19/2026 |
| Helen Torley | ▼ Sell | Open Market | 3,200 | $345K | 8/19/2026 |
| Helen Torley | ▲ Buy | Option Exercise | 20,000 | $368K | 8/18/2026 |
| Helen Torley | ▼ Sell | Open Market | 4,897 | $510K | 8/18/2026 |
| Helen Torley | ▼ Sell | Open Market | 9,400 | $986K | 8/18/2026 |
| Helen Torley | ▼ Sell | Open Market | 5,703 | $588K | 8/18/2026 |
| Helen Torley | ▲ Buy | Option Exercise | 20,000 | $368K | 8/17/2026 |
| Helen Torley | ▼ Sell | Open Market | 900 | $89K | 8/17/2026 |
| Helen Torley | ▼ Sell | Open Market | 500 | $50K | 8/17/2026 |
| Helen Torley | ▼ Sell | Open Market | 2,100 | $214K | 8/17/2026 |
| Helen Torley | ▼ Sell | Open Market | 9,000 | $923K | 8/17/2026 |
| Helen Torley | ▼ Sell | Open Market | 7,500 | $776K | 8/17/2026 |
| Bernadette Connaughton | ▼ Sell | Open Market | 1,626 | $167K | 8/10/2026 |
| Helen Torley | ▲ Buy | Option Exercise | 1,923 | $23K | 7/8/2026 |
| Helen Torley | ▼ Sell | Open Market | 888 | $70K | 7/8/2026 |
| Helen Torley | ▼ Sell | Open Market | 1,035 | $83K | 7/8/2026 |
| Bernadette Connaughton | ▼ Sell | Open Market | 1,000 | $76K | 7/1/2026 |
| Bernadette Connaughton | ▼ Sell | Open Market | 625 | $48K | 7/1/2026 |
| David A. Ramsay | ▲ Buy | Option Exercise | 10,000 | $0 | 6/30/2026 |
| David A. Ramsay | ▼ Sell | Tax Withholding | 5,408 | $423K | 6/30/2026 |
| Mahesh Krishnan | ▲ Buy | Option Exercise | 7,304 | $281K | 6/29/2026 |
| Mahesh Krishnan | ▼ Sell | Open Market | 7,304 | $548K | 6/29/2026 |
| Mark Howard Snyder | ▲ Buy | Option Exercise | 5,034 | $0 | 6/12/2026 |
| Mark Howard Snyder | ▼ Sell | Tax Withholding | 2,715 | $189K | 6/12/2026 |
| Helen Torley | ▼ Sell | Open Market | 6,100 | $425K | 6/3/2026 |
| Helen Torley | ▲ Buy | Option Exercise | 10,000 | $121K | 6/3/2026 |
| Helen Torley | ▼ Sell | Open Market | 400 | $27K | 6/3/2026 |
| Helen Torley | ▼ Sell | Open Market | 1,500 | $102K | 6/3/2026 |
| Helen Torley | ▼ Sell | Open Market | 2,000 | $137K | 6/3/2026 |
| Helen Torley | ▲ Buy | Option Exercise | 20,000 | $241K | 6/2/2026 |
| Helen Torley | ▼ Sell | Open Market | 16,600 | $1.1M | 6/2/2026 |
| Helen Torley | ▼ Sell | Open Market | 3,400 | $227K | 6/2/2026 |
| Helen Torley | ▲ Buy | Option Exercise | 20,000 | $241K | 6/1/2026 |
| Bernadette Connaughton | ▼ Sell | Open Market | 1,625 | $108K | 6/1/2026 |
| Helen Torley | ▼ Sell | Open Market | 1,610 | $107K | 6/1/2026 |
| Helen Torley | ▼ Sell | Open Market | 12,989 | $876K | 6/1/2026 |
| Helen Torley | ▼ Sell | Open Market | 5,401 | $369K | 6/1/2026 |
| Helen Torley | ▲ Buy | Option Exercise | 10,000 | $121K | 5/13/2026 |
| Helen Torley | ▼ Sell | Open Market | 2,100 | $143K | 5/13/2026 |
| Helen Torley | ▼ Sell | Open Market | 3,350 | $231K | 5/13/2026 |
| Helen Torley | ▼ Sell | Open Market | 3,950 | $276K | 5/13/2026 |
| Helen Torley | ▼ Sell | Open Market | 600 | $42K | 5/13/2026 |
| Helen Torley | ▲ Buy | Option Exercise | 20,000 | $241K | 5/12/2026 |
| Helen Torley | ▼ Sell | Open Market | 100 | $7K | 5/12/2026 |
| Helen Torley | ▼ Sell | Open Market | 1,398 | $98K | 5/12/2026 |
| Helen Torley | ▼ Sell | Open Market | 9,802 | $700K | 5/12/2026 |
| Helen Torley | ▼ Sell | Open Market | 5,900 | $426K | 5/12/2026 |
| Helen Torley | ▼ Sell | Open Market | 2,800 | $205K | 5/12/2026 |
| Helen Torley | ▲ Buy | Option Exercise | 20,000 | $241K | 5/11/2026 |
| Helen Torley | ▼ Sell | Open Market | 9,725 | $629K | 5/11/2026 |
| Helen Torley | ▼ Sell | Open Market | 3,575 | $234K | 5/11/2026 |
| Helen Torley | ▼ Sell | Open Market | 6,700 | $444K | 5/11/2026 |
| Matthew L. Posard | ▲ Buy | Grant | 3,796 | $0 | 5/5/2026 |
| Mahesh Krishnan | ▲ Buy | Grant | 3,796 | $0 | 5/5/2026 |
| James Paul Lang | ▲ Buy | Grant | 3,796 | $0 | 5/5/2026 |
| Jeffrey William Henderson | ▲ Buy | Grant | 3,796 | $0 | 5/5/2026 |
| Barbara Gayle Duncan | ▲ Buy | Grant | 3,796 | $0 | 5/5/2026 |
| Bernadette Connaughton | ▲ Buy | Grant | 6,796 | $0 | 5/5/2026 |
| Bernadette Connaughton | ▼ Sell | Open Market | 1,625 | $103K | 5/1/2026 |
| Helen Torley | ▲ Buy | Option Exercise | 10,000 | $121K | 4/6/2026 |
| Helen Torley | ▼ Sell | Open Market | 5,900 | $373K | 4/6/2026 |
| Helen Torley | ▼ Sell | Open Market | 4,100 | $262K | 4/6/2026 |
| Helen Torley | ▲ Buy | Option Exercise | 20,000 | $241K | 4/2/2026 |
| Helen Torley | ▼ Sell | Open Market | 15,800 | $1.0M | 4/2/2026 |
| Helen Torley | ▼ Sell | Open Market | 4,200 | $273K | 4/2/2026 |
| Helen Torley | ▲ Buy | Option Exercise | 20,000 | $241K | 4/1/2026 |
| Helen Torley | ▼ Sell | Open Market | 19,000 | $1.2M | 4/1/2026 |
| Helen Torley | ▼ Sell | Open Market | 1,000 | $66K | 4/1/2026 |
| Cortney Caudill | ▲ Buy | Option Exercise | 1,546 | $52K | 3/10/2026 |
| Cortney Caudill | ▼ Sell | Open Market | 8,857 | $599K | 3/10/2026 |
| Cortney Caudill | ▲ Buy | Option Exercise | 20,000 | $670K | 3/9/2026 |
| Cortney Caudill | ▼ Sell | Open Market | 17,900 | $1.2M | 3/9/2026 |
| Cortney Caudill | ▼ Sell | Open Market | 2,100 | $143K | 3/9/2026 |
| Helen Torley | ▲ Buy | Option Exercise | 10,000 | $121K | 3/4/2026 |
| Helen Torley | ▼ Sell | Open Market | 7,329 | $513K | 3/4/2026 |
| Helen Torley | ▼ Sell | Open Market | 2,671 | $189K | 3/4/2026 |
| Helen Torley | ▲ Buy | Option Exercise | 20,000 | $241K | 3/3/2026 |
| Helen Torley | ▼ Sell | Open Market | 13,481 | $928K | 3/3/2026 |
| Helen Torley | ▼ Sell | Open Market | 6,519 | $452K | 3/3/2026 |
| Helen Torley | ▲ Buy | Option Exercise | 20,000 | $241K | 3/2/2026 |
| Helen Torley | ▼ Sell | Open Market | 4,100 | $284K | 3/2/2026 |
| Helen Torley | ▼ Sell | Open Market | 15,322 | $1.1M | 3/2/2026 |
| Helen Torley | ▼ Sell | Open Market | 578 | $41K | 3/2/2026 |
| Mark Howard Snyder | ▲ Buy | Option Exercise | 7,011 | $0 | 2/23/2026 |
| Mark Howard Snyder | ▼ Sell | Tax Withholding | 3,782 | $267K | 2/23/2026 |
| Nicole LaBrosse | ▲ Buy | Option Exercise | 6,688 | $0 | 2/23/2026 |
| Nicole LaBrosse | ▼ Sell | Tax Withholding | 3,608 | $255K | 2/23/2026 |
| Helen Torley | ▲ Buy | Option Exercise | 22,436 | $0 | 2/23/2026 |
| Helen Torley | ▼ Sell | Tax Withholding | 12,104 | $855K | 2/23/2026 |
| Cortney Caudill | ▲ Buy | Option Exercise | 2,666 | $0 | 2/20/2026 |
| Cortney Caudill | ▼ Sell | Tax Withholding | 1,037 | $74K | 2/20/2026 |
| Mark Howard Snyder | ▲ Buy | Option Exercise | 5,332 | $0 | 2/20/2026 |
| Mark Howard Snyder | ▼ Sell | Tax Withholding | 2,876 | $204K | 2/20/2026 |
| Nicole LaBrosse | ▲ Buy | Option Exercise | 5,332 | $0 | 2/20/2026 |
| Nicole LaBrosse | ▼ Sell | Tax Withholding | 2,876 | $204K | 2/20/2026 |
| Helen Torley | ▲ Buy | Option Exercise | 16,757 | $0 | 2/20/2026 |
| Helen Torley | ▼ Sell | Tax Withholding | 9,040 | $642K | 2/20/2026 |
| Mark Howard Snyder | ▲ Buy | Option Exercise | 4,796 | $0 | 2/16/2026 |
| Mark Howard Snyder | ▼ Sell | Tax Withholding | 2,587 | $206K | 2/16/2026 |
| Mark Howard Snyder | ▲ Buy | Option Exercise | 12,016 | $0 | 2/16/2026 |
| Mark Howard Snyder | ▼ Sell | Tax Withholding | 6,481 | $515K | 2/16/2026 |
| Nicole LaBrosse | ▲ Buy | Option Exercise | 5,093 | $0 | 2/16/2026 |
| Nicole LaBrosse | ▼ Sell | Tax Withholding | 2,747 | $218K | 2/16/2026 |
| Nicole LaBrosse | ▲ Buy | Option Exercise | 5,329 | $0 | 2/16/2026 |
| Nicole LaBrosse | ▼ Sell | Tax Withholding | 2,874 | $228K | 2/16/2026 |
| Nicole LaBrosse | ▲ Buy | Option Exercise | 13,351 | $0 | 2/16/2026 |
| Nicole LaBrosse | ▼ Sell | Tax Withholding | 7,273 | $578K | 2/16/2026 |
| Helen Torley | ▲ Buy | Option Exercise | 21,009 | $0 | 2/16/2026 |
| Helen Torley | ▼ Sell | Tax Withholding | 11,334 | $900K | 2/16/2026 |
| Helen Torley | ▲ Buy | Option Exercise | 16,875 | $0 | 2/16/2026 |
| Helen Torley | ▼ Sell | Tax Withholding | 9,104 | $723K | 2/16/2026 |
| Helen Torley | ▲ Buy | Option Exercise | 51,171 | $0 | 2/16/2026 |
| Helen Torley | ▼ Sell | Tax Withholding | 27,605 | $2.2M | 2/16/2026 |
| Helen Torley | ▲ Buy | Option Exercise | 10,000 | $121K | 2/5/2026 |
| Helen Torley | ▼ Sell | Open Market | 5,376 | $421K | 2/5/2026 |
| Helen Torley | ▼ Sell | Open Market | 4,624 | $365K | 2/5/2026 |
| Helen Torley | ▲ Buy | Option Exercise | 20,000 | $241K | 2/4/2026 |
| Helen Torley | ▼ Sell | Open Market | 9,900 | $762K | 2/4/2026 |
| Helen Torley | ▼ Sell | Open Market | 10,100 | $783K | 2/4/2026 |
| Helen Torley | ▲ Buy | Option Exercise | 20,000 | $241K | 2/3/2026 |
| Helen Torley | ▼ Sell | Open Market | 2,551 | $191K | 2/3/2026 |
| Helen Torley | ▼ Sell | Open Market | 9,659 | $734K | 2/3/2026 |
| Helen Torley | ▼ Sell | Open Market | 7,790 | $598K | 2/3/2026 |
| Bernadette Connaughton | ▼ Sell | Open Market | 2,000 | $141K | 1/5/2026 |
| Mark Howard Snyder | ▲ Buy | Option Exercise | 7,611 | $0 | 1/3/2026 |
| Mark Howard Snyder | ▼ Sell | Tax Withholding | 4,243 | $298K | 1/3/2026 |
| James Paul Lang | ▲ Buy | Grant | 889 | $0 | 1/2/2026 |
| Bernadette Connaughton | ▼ Sell | Open Market | 829 | $59K | 12/1/2025 |
| Helen Torley | ▲ Buy | Option Exercise | 16,569 | $134K | 12/1/2025 |
| Helen Torley | ▼ Sell | Open Market | 10,406 | $713K | 12/1/2025 |
| Helen Torley | ▼ Sell | Open Market | 5,402 | $375K | 12/1/2025 |
| Helen Torley | ▼ Sell | Open Market | 500 | $35K | 12/1/2025 |
| Helen Torley | ▼ Sell | Open Market | 261 | $19K | 12/1/2025 |
| Helen Torley | ▼ Sell | Gift | 25,000 | $0 | 11/26/2025 |
| Helen Torley | ▲ Buy | Option Exercise | 20,000 | $162K | 11/12/2025 |
| Helen Torley | ▼ Sell | Open Market | 12,718 | $893K | 11/12/2025 |
| Helen Torley | ▼ Sell | Open Market | 6,784 | $482K | 11/12/2025 |
| Helen Torley | ▼ Sell | Open Market | 498 | $36K | 11/12/2025 |
| Helen Torley | ▲ Buy | Option Exercise | 20,000 | $162K | 11/11/2025 |
| Helen Torley | ▼ Sell | Open Market | 4,500 | $306K | 11/11/2025 |
| Helen Torley | ▼ Sell | Open Market | 4,000 | $275K | 11/11/2025 |
| Helen Torley | ▼ Sell | Open Market | 11,500 | $802K | 11/11/2025 |
| Helen Torley | ▲ Buy | Option Exercise | 20,000 | $162K | 11/10/2025 |
| Helen Torley | ▼ Sell | Open Market | 19,900 | $1.4M | 11/10/2025 |
| Helen Torley | ▼ Sell | Open Market | 100 | $7K | 11/10/2025 |
| Bernadette Connaughton | ▼ Sell | Open Market | 2,000 | $137K | 11/10/2025 |
| Cortney Caudill | ▲ Buy | Option Exercise | 9,326 | $0 | 11/1/2025 |
| Cortney Caudill | ▼ Sell | Open Market | 4,263 | $278K | 11/1/2025 |
| Helen Torley | ▲ Buy | Option Exercise | 20,000 | $162K | 10/3/2025 |
| Helen Torley | ▼ Sell | Open Market | 14,235 | $975K | 10/3/2025 |
| Helen Torley | ▼ Sell | Open Market | 2,334 | $163K | 10/3/2025 |
| Helen Torley | ▼ Sell | Open Market | 2,707 | $191K | 10/3/2025 |
| Helen Torley | ▼ Sell | Open Market | 724 | $52K | 10/3/2025 |
| Helen Torley | ▲ Buy | Option Exercise | 20,000 | $162K | 10/2/2025 |
| Helen Torley | ▼ Sell | Open Market | 6,600 | $465K | 10/2/2025 |
| Helen Torley | ▼ Sell | Open Market | 10,200 | $727K | 10/2/2025 |
| Helen Torley | ▼ Sell | Open Market | 2,400 | $173K | 10/2/2025 |
| Helen Torley | ▼ Sell | Open Market | 700 | $51K | 10/2/2025 |
| Helen Torley | ▼ Sell | Open Market | 100 | $7K | 10/2/2025 |
| Helen Torley | ▲ Buy | Option Exercise | 20,000 | $162K | 10/1/2025 |
| Helen Torley | ▼ Sell | Open Market | 11,705 | $879K | 10/1/2025 |
| Helen Torley | ▼ Sell | Open Market | 8,295 | $628K | 10/1/2025 |
| Bernadette Connaughton | ▼ Sell | Open Market | 1,500 | $113K | 10/1/2025 |
| Bernadette Connaughton | ▼ Sell | Open Market | 500 | $38K | 10/1/2025 |
| Nicole LaBrosse | ▼ Sell | Open Market | 1,913 | $149K | 9/22/2025 |
| Nicole LaBrosse | ▼ Sell | Open Market | 314 | $25K | 9/22/2025 |
| Nicole LaBrosse | ▲ Buy | Option Exercise | 11,271 | $136K | 9/10/2025 |
| Nicole LaBrosse | ▲ Buy | Option Exercise | 1,135 | $14K | 9/10/2025 |
| Nicole LaBrosse | ▼ Sell | Open Market | 6,760 | $509K | 9/10/2025 |
| Nicole LaBrosse | ▼ Sell | Open Market | 13,240 | $1.0M | 9/10/2025 |
| Helen Torley | ▲ Buy | Option Exercise | 20,000 | $162K | 9/4/2025 |
| Helen Torley | ▼ Sell | Open Market | 9,900 | $728K | 9/4/2025 |
| Helen Torley | ▼ Sell | Open Market | 7,800 | $580K | 9/4/2025 |
| Helen Torley | ▼ Sell | Open Market | 2,300 | $173K | 9/4/2025 |
| Helen Torley | ▲ Buy | Option Exercise | 20,000 | $162K | 9/3/2025 |
| Helen Torley | ▼ Sell | Open Market | 9,500 | $705K | 9/3/2025 |
| Helen Torley | ▼ Sell | Open Market | 10,500 | $784K | 9/3/2025 |
| Helen Torley | ▲ Buy | Option Exercise | 20,000 | $162K | 9/2/2025 |
| Helen Torley | ▼ Sell | Open Market | 300 | $22K | 9/2/2025 |
| Helen Torley | ▼ Sell | Open Market | 16,288 | $1.2M | 9/2/2025 |
| Helen Torley | ▼ Sell | Open Market | 3,412 | $253K | 9/2/2025 |
| Bernadette Connaughton | ▼ Sell | Open Market | 100 | $7K | 9/2/2025 |
| Bernadette Connaughton | ▼ Sell | Open Market | 2,977 | $219K | 9/2/2025 |
| Bernadette Connaughton | ▼ Sell | Open Market | 923 | $68K | 9/2/2025 |
| Helen Torley | ▲ Buy | Option Exercise | 20,000 | $162K | 8/13/2025 |
| Helen Torley | ▼ Sell | Open Market | 14,948 | $959K | 8/13/2025 |
| Helen Torley | ▼ Sell | Open Market | 5,052 | $328K | 8/13/2025 |
| Helen Torley | ▲ Buy | Option Exercise | 20,000 | $162K | 8/12/2025 |
| Helen Torley | ▼ Sell | Open Market | 13,042 | $825K | 8/12/2025 |
| Helen Torley | ▼ Sell | Open Market | 6,958 | $445K | 8/12/2025 |
| Helen Torley | ▲ Buy | Option Exercise | 20,000 | $162K | 8/11/2025 |
| Helen Torley | ▼ Sell | Open Market | 18,717 | $1.2M | 8/11/2025 |
| Helen Torley | ▼ Sell | Open Market | 1,283 | $82K | 8/11/2025 |
| Helen Torley | ▲ Buy | Option Exercise | 20,000 | $162K | 7/10/2025 |
| Helen Torley | ▼ Sell | Open Market | 4,254 | $241K | 7/10/2025 |
| Helen Torley | ▼ Sell | Open Market | 15,746 | $907K | 7/10/2025 |
| Helen Torley | ▲ Buy | Option Exercise | 20,000 | $162K | 7/9/2025 |
| Helen Torley | ▼ Sell | Open Market | 19,792 | $1.1M | 7/9/2025 |