SEC Form 4 · Updated Daily
HALO
— HALOZYME THERAPEUTICS, INC. OwnershipInsider and institutional ownership derived from SEC Form 4 filings. Click any owner to see their holdings across every company they’ve filed on, and how their position has changed over time.
Current Reporting Owners
| Owner | Role | Shares Owned | As Of | Last Activity |
|---|---|---|---|---|
| KIRK RANDAL J | 10%+ Owner | 4,120,689 | 2018-08-24 | S |
| Frost Gregory Ian | Director · Officer | 3,641,380 | 2013-12-11 | M |
| Torley Helen | Director · Officer | 787,780 | 2026-10-08 | M |
| Lim Jonathan E | Director | 710,000 | 2010-01-12 | M |
| FALBERG KATHRYN E | Director | 358,253 | 2016-05-04 | A |
| Engler Robert | Director | 308,176 | 2014-08-14 | M |
| PATTON JOHN STUART | Director | 254,876 | 2014-08-19 | M |
| LaBarre Michael J. | Officer | 186,153 | 2025-02-25 | S |
| MATSUI CONNIE | Director | 183,035 | 2024-11-29 | G |
| Kelley Kenneth J | Director | 179,833 | 2021-04-14 | S |
| Stelzer Laurie | Officer | 120,675 | 2020-02-22 | M |
| Yocum Richard C | Officer | 95,833 | 2007-03-21 | M |
| LEONHARDT HARRY J | Officer | 68,750 | 2019-04-13 | M |
| BIZZARI JEAN-PIERRE | Director | 66,815 | 2023-05-05 | A |
| Posard Matthew L. | Director | 58,109 | 2026-10-01 | S |
| Shaffer James P | Officer | 54,025 | 2014-02-04 | M |
| Snyder Mark Howard | Officer | 52,644 | 2026-06-12 | M |
| Countouriotis Athena | Director | 45,977 | 2017-02-03 | M |
| Connaughton Bernadette | Director | 42,294 | 2026-05-05 | A |
| LaBrosse Nicole | Officer | 42,102 | 2026-02-23 | M |
| Chondros Dimitrios | Officer | 38,584 | 2019-08-03 | S |
| Henderson Jeffrey William | Director | 36,572 | 2026-05-05 | A |
| GUSTAFSON KURT A | Director | 35,667 | 2013-02-02 | M |
| Caudill Cortney | Officer | 34,366 | 2026-03-09 | M |
| Thornton Steven T | Director | 30,000 | 2008-05-08 | A |
| Miyashita Akiko Moni | Director | 24,937 | 2025-05-01 | A |
| DUNCAN BARBARA GAYLE | Director | 23,715 | 2026-05-05 | A |
| Matsuda Masaru | Officer | 23,461 | 2021-09-04 | M |
| Krishnan Mahesh | Director | 21,766 | 2026-06-29 | M |
| LIU JEAN I | Officer | 20,869 | 2014-02-04 | M |
| Hickey Benjamin | Officer | 20,216 | 2019-10-01 | M |
| Sun Elaine D | Officer | 18,077 | 2021-04-01 | M |
| Shepard H. Michael | Officer | 13,198 | 2013-08-19 | S |
| LITTLE ROBERT J | Officer | 13,000 | 2008-03-20 | P |
| RAMSAY DAVID A | Director | 10,000 | 2026-06-30 | M |
| Lang James Paul | Director | 4,685 | 2026-05-05 | A |
| Daly James M | Director | 1,169 | 2026-10-01 | A |
| Appelhans Dannielle | Director | 1,161 | 2026-09-01 | A |
| Hooper Matthew | Officer | 0 | 2007-11-05 | — |
Recent Filings
| Date | Owner | Activity | Shares | Price | Owned After |
|---|---|---|---|---|---|
| 2026-10-08 | Torley Helen | Option exercise (derivative) | 20,000 | $18.41 | 21,552 |
| 2026-10-08 | Torley Helen | Open-market sale | 200 | $110.51 | 767,780 |
| 2026-10-08 | Torley Helen | Open-market sale | 11,900 | $110.00 | 767,980 |
| 2026-10-08 | Torley Helen | Open-market sale | 3,090 | $108.91 | 779,880 |
| 2026-10-08 | Torley Helen | Open-market sale | 4,810 | $108.18 | 782,970 |
| 2026-10-08 | Torley Helen | Option exercise | 20,000 | $18.41 | 787,780 |
| 2026-10-07 | Torley Helen | Option exercise (derivative) | 20,000 | $18.41 | 41,552 |
| 2026-10-07 | Torley Helen | Open-market sale | 200 | $113.69 | 767,780 |
| 2026-10-07 | Torley Helen | Open-market sale | 900 | $112.78 | 767,980 |
| 2026-10-07 | Torley Helen | Open-market sale | 10,300 | $111.84 | 768,880 |
| 2026-10-07 | Torley Helen | Open-market sale | 8,600 | $111.03 | 779,180 |
| 2026-10-07 | Torley Helen | Option exercise | 20,000 | $18.41 | 787,780 |
| 2026-10-06 | Torley Helen | Option exercise (derivative) | 20,000 | $18.41 | 61,552 |
| 2026-10-06 | Torley Helen | Open-market sale | 1,780 | $110.81 | 767,780 |
| 2026-10-06 | Torley Helen | Open-market sale | 9,920 | $109.89 | 769,560 |
| 2026-10-06 | Torley Helen | Open-market sale | 6,000 | $109.33 | 779,480 |
| 2026-10-06 | Torley Helen | Open-market sale | 2,300 | $107.90 | 785,480 |
| 2026-10-06 | Torley Helen | Option exercise | 20,000 | $18.41 | 787,780 |
| 2026-10-01 | Posard Matthew L. | Open-market sale | 100 | $110.04 | 53,609 |
| 2026-10-01 | Posard Matthew L. | Open-market sale | 1,100 | $109.57 | 53,709 |
| 2026-10-01 | Posard Matthew L. | Open-market sale | 3,300 | $108.45 | 54,809 |
| 2026-10-01 | Posard Matthew L. | Open-market sale | 730 | $107.17 | 58,109 |
| 2026-10-01 | Daly James M | Grant / award (derivative) | 1,775 | $0.00 | 1,775 |
| 2026-10-01 | Daly James M | Grant / award | 1,169 | $0.00 | 1,169 |
| 2026-09-16 | Posard Matthew L. | Open-market sale | 4,000 | $108.99 | 58,839 |
| 2026-09-16 | Posard Matthew L. | Open-market sale | 8,896 | $108.04 | 62,839 |
| 2026-09-16 | Posard Matthew L. | Open-market sale | 3,000 | $106.83 | 71,735 |
| 2026-09-16 | Posard Matthew L. | Open-market sale | 3,100 | $106.13 | 74,735 |
| 2026-09-11 | Torley Helen | Option exercise (derivative) | 20,000 | $18.41 | 81,552 |
| 2026-09-11 | Torley Helen | Open-market sale | 4,508 | $107.55 | 767,780 |
| 2026-09-11 | Torley Helen | Open-market sale | 15,492 | $107.15 | 772,288 |
| 2026-09-11 | Torley Helen | Option exercise | 20,000 | $18.41 | 787,780 |
| 2026-09-10 | Torley Helen | Option exercise (derivative) | 20,000 | $18.41 | 101,552 |
| 2026-09-10 | Torley Helen | Open-market sale | 5,412 | $107.58 | 767,780 |
| 2026-09-10 | Torley Helen | Open-market sale | 14,588 | $107.01 | 773,192 |
| 2026-09-10 | Torley Helen | Option exercise | 20,000 | $18.41 | 787,780 |
| 2026-09-09 | Torley Helen | Option exercise (derivative) | 20,000 | $18.41 | 121,552 |
| 2026-09-09 | Torley Helen | Open-market sale | 100 | $108.67 | 767,780 |
| 2026-09-09 | Torley Helen | Open-market sale | 6,596 | $107.82 | 767,880 |
| 2026-09-09 | Torley Helen | Open-market sale | 13,304 | $107.22 | 774,476 |
Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.