List of insiders holdings for MacroGenics, Inc.:
- Shares directly owned by the insider.
- Shares indirectly owned by the insider.
- Total shares owned by the insider (sum of shares directly and indirectly owned).
- Total market value if available.
- Shares are not adjusted for stock split.
"Insiders might sell their shares for any number of reasons, but they buy them for only one: they think the price will rise"
- Peter Lynch
What is insider trading>>
- Peter Lynch
What is insider trading>>
| # | Insider Holder Name | Report Date Time | Shares Owned Directly Indirectly | Total Shares Owned | Filing |
| 1 | ORONSKY ARNOLD L Director | 2014-02-18 16:03:27 | 0 1,708,716 | 1,708,716 | Form 4 |
| 2 | INTERWEST PARTNERS VIII LP InterWest Management Partners VIII LLC INTERWEST INVESTORS VIII L P INTERWEST INVESTORS Q VIII LP CASH HARVEY B GIANOS PHILIP T Kliman Gilbert H HEDRICK W SCOTT Holmes W Stephen 10% Owner | 2015-02-13 06:18:59 | 1,282,303 0 | 1,282,303 | Form 13G |
| 3 | Risser Eric Blasius President and CEO | 2026-02-17 18:23:49 | 772,169 0 | 772,169 | Form 4 |
| 4 | Karrels James SVP and CFO | 2026-02-17 18:25:50 | 381,037 0 | 381,037 | Form 4 |
| 5 | Bonvini Ezio Sr VP, Research & CSO | 2026-02-17 18:27:13 | 364,549 0 | 364,549 | Form 4 |
| 6 | Spitznagel Thomas Sr VP, Technical Ops | 2026-02-17 18:24:23 | 213,543 0 | 213,543 | Form 4 |
| 7 | Peters Jeffrey Stuart Senior VP, GC, and Secretary | 2026-02-17 18:25:13 | 206,105 0 | 206,105 | Form 4 |
| 8 | HEIDEN WILLIAM K Director | 2026-05-20 16:14:02 | 140,500 0 | 140,500 | Form 4 |
| 9 | Smith Beth Ann VP, Controller & Treasurer | 2026-02-17 18:26:26 | 122,156 0 | 122,156 | Form 4 |
| 10 | Wigginton Jon Marc Sr VP, Clinical Dev. & CMO | 2020-02-24 16:46:33 | 100,000 0 | 100,000 | Form 4 |
| 11 | Stein Kathryn E SVP, Product Dev. & Regulatory | 2016-01-11 13:39:46 | 95,555 0 | 95,555 | Form 4 |
| 12 | HURWITZ EDWARD Director | 2026-05-20 16:13:38 | 73,574 0 | 73,574 | Form 4 |
| 13 | Eck Stephen L. Chief Medical Officer | 2025-02-19 16:20:46 | 46,042 0 | 46,042 | Form 4 |
| 14 | STUMP DAVID C Director | 2026-05-20 16:13:33 | 40,500 0 | 40,500 | Form 4 |
| 15 | O'Brien Federica F. Director | 2026-05-20 16:14:15 | 40,500 0 | 40,500 | Form 4 |
| 16 | Chhabra Meenu Director | 2026-05-20 16:13:45 | 40,500 0 | 40,500 | Form 4 |
| 17 | Ferrante Karen Jean Director | 2026-05-20 16:13:27 | 40,500 0 | 40,500 | Form 4 |
| 18 | Liu Margaret Director | 2026-05-20 16:13:51 | 40,500 0 | 40,500 | Form 4 |
| 19 | Jackson Scott Thomas Director | 2026-05-20 16:14:08 | 40,500 0 | 40,500 | Form 4 |
| 20 | ALTA BIOPHARMA PARTNERS III LP ALTA BIOPHARMA PARTNERS III GMBH & CO BETEILIGUNGS KG ALTA EMBARCADERO BIOPHARMA PARTNERS III LLC 10% Owner | 2016-02-12 17:24:27 | 27,630 0 | 27,630 | Form 13G |
| 21 | Koenig Scott Director | 2026-05-20 16:13:21 | 25,750 0 | 25,750 | Form 4 |
| 22 | Cilinski Lynn VP, Controller and Treasurer | 2024-02-20 18:04:45 | 19,545 0 | 19,545 | Form 4 |
| 23 | SARAN ATUL SVP & General Counsel | 2017-05-02 12:58:29 | 16,986 0 | 16,986 | Form 4 |
| 24 | Stewart Stanford John V P, Clinical Oncology | 2013-10-11 16:46:03 | 15,979 0 | 15,979 | Form 4 |
| 25 | Galbraith Kenneth Director | 2021-05-17 21:20:23 | 15,000 0 | 15,000 | Form 4 |
| 26 | Costa Paulo F Director | 2021-05-17 21:17:27 | 15,000 0 | 15,000 | Form 4 |
| 27 | SIEGEL JAY PHILIP Director | 2026-05-20 16:13:56 | 14,750 0 | 14,750 | Form 4 |
| 28 | Nadav Eran Director | 2013-10-11 16:54:29 | 13,849 0 | 13,849 | Form 4 |
| 29 | Fust Matthew K Director | 2019-05-20 17:47:34 | 10,000 0 | 10,000 | Form 4 |
| 30 | BIOTECH TARGET N V BB BIOTECH AG 10% Owner | 2025-06-13 14:50:19 | 0 0 | 0 | Form 13G |
| 31 | TPG Group Holdings (SBS) Advisors Inc. BONDERMAN DAVID COULTER JAMES G Former 10% Owner | 2015-02-13 12:35:06 | 0 0 | 0 | Form 13G |