IGM Biosciences, Inc. Forms 3, 4 and 5: Other
Statements of beneficial ownership filed with the SEC by officers, directors and 10% owners: 29 rows, 29 shown. Transaction codes are the SEC's. Shares and prices are split-adjusted; the as-filed figure is underneath.
- 2025-08-14: Reporting owner BAKER BROS. ADVISORS LP | Baker Brothers Life Sciences LP | BAKER FELIX | Baker Bros. Advisors (GP) LLC | 667, L.P. | BAKER JULIAN; Form 4; Security Non-Voting Common Stock; Transaction U Disposition pursuant to a tender of shares in a change of control transaction.
- 2025-08-14: Reporting owner BAKER BROS. ADVISORS LP | Baker Brothers Life Sciences LP | BAKER FELIX | Baker Bros. Advisors (GP) LLC | 667, L.P. | BAKER JULIAN; Form 4; Security Non-Voting Common Stock; Transaction U Disposition pursuant to a tender of shares in a change of control transaction.
- 2025-08-14: Reporting owner Green Jeremy | Redmile Group, LLC; Form 4; Security Non-Voting Common Stock; Transaction D Disposition to the issuer of issuer equity securities pursuant to Rule 16b-3(e).
- 2025-08-14: Reporting owner Topsoe Holding A/S; Form 4; Security Non-Voting Common Stock; Transaction D Disposition to the issuer of issuer equity securities pursuant to Rule 16b-3(e).
| Transaction date | Reporting owner | Form | Security | Transaction | Shares | Price | Price that day | Filing |
|---|---|---|---|---|---|---|---|---|
| 2025-08-14 | BAKER BROS. ADVISORS LP | Baker Brothers Life Sciences LP | BAKER FELIX | Baker Bros. Advisors (GP) LLC | 667, L.P. | BAKER JULIAN Other (Former 10% owner and director) | Other (Former 10% owner and director) | Other (Former 10% owner and director) | Other (Former 10% owner and director) | Other (Former 10% owner and director) | Other (Former 10% owner and director) | 4 | Non-Voting Common Stock Derivative · Indirect · See Footnotes | U Disposition pursuant to a tender of shares in a change of control transaction | −834,707 0 owned after | $0.00 | 2025-08-18 | |
| 2025-08-14 | BAKER BROS. ADVISORS LP | Baker Brothers Life Sciences LP | BAKER FELIX | Baker Bros. Advisors (GP) LLC | 667, L.P. | BAKER JULIAN Other (Former 10% owner and director) | Other (Former 10% owner and director) | Other (Former 10% owner and director) | Other (Former 10% owner and director) | Other (Former 10% owner and director) | Other (Former 10% owner and director) | 4 | Non-Voting Common Stock Derivative · Indirect · See Footnotes | U Disposition pursuant to a tender of shares in a change of control transaction | −9,886,217 0 owned after | $0.00 | 2025-08-18 | |
| 2025-08-14 | Green Jeremy | Redmile Group, LLC 10% Owner | Director, 10% Owner | 4 | Non-Voting Common Stock Derivative · Indirect · See Footnotes | D Disposition to the issuer of issuer equity securities pursuant to Rule 16b-3(e) | −7,199,325 0 owned after | no price filed | 2025-08-15 | |
| 2025-08-14 | Topsoe Holding A/S 10% Owner | 4 | Non-Voting Common Stock Derivative · Direct | D Disposition to the issuer of issuer equity securities pursuant to Rule 16b-3(e) | −5,044,295 0 owned after | $0.00 | 2025-08-14 | |
| 2025-08-14 | Topsoe Jakob Haldor Director, 10% Owner | 4 | Non-Voting Common Stock Derivative · Indirect · See footnote | D Disposition to the issuer of issuer equity securities pursuant to Rule 16b-3(e) | −5,044,295 0 owned after | $0.00 | 2025-08-14 | |
| 2025-08-14 | Topsoe Christina Teng Director, 10% Owner | 4 | Non-Voting Common Stock Derivative · Indirect · See footnote | D Disposition to the issuer of issuer equity securities pursuant to Rule 16b-3(e) | −5,044,295 0 owned after | $0.00 | 2025-08-14 | |
| 2024-02-28 | Green Jeremy | Redmile Group, LLC 10% Owner | Director, 10% Owner | 4 | Non-Voting Common Stock Derivative · Indirect · See Footnote | C Conversion of derivative security | −113,400 7,199,325 owned after | $0.00 | 2024-03-01 | |
| 2023-11-29 | Decker Lisa Lynn Officer (Chief Business Officer) | 4 | 11/29/2023 Non-derivative · Direct | S Open market or private sale of non-derivative or derivative security | −1,180 40,001 owned after | $6.21 | 2023-12-01 | |
| 2023-06-26 | Redmile Group, LLC | Green Jeremy Director | Director | 4 | Non-Voting Common Stock Derivative · Indirect · See Footnote | A Grant, award or other acquisition pursuant to Rule 16b-3(d) | +2,812,500 7,312,725 owned after | $8.00 | 2023-06-28 | |
| 2023-06-26 | Topsoe Jakob Haldor Director, 10% Owner | 4 | Non-Voting Common Stock Derivative · Indirect · See footnote | P Open market or private purchase of non-derivative or derivative security | +1,687,500 5,044,295 owned after | $8.00 | 2023-06-28 | |
| 2023-06-26 | Topsoe Christina Teng Director, 10% Owner | 4 | Non-Voting Common Stock Derivative · Indirect · See footnote | P Open market or private purchase of non-derivative or derivative security | +1,687,500 5,044,295 owned after | $8.00 | 2023-06-28 | |
| 2023-06-26 | Topsoe Holding A/S 10% Owner | 4 | Non-Voting Common Stock Derivative · Direct | P Open market or private purchase of non-derivative or derivative security | +1,687,500 5,044,295 owned after | $8.00 | 2023-06-28 | |
| 2023-06-26 | BAKER JULIAN | BAKER BROS. ADVISORS LP | Baker Brothers Life Sciences LP | Baker Bros. Advisors (GP) LLC | 667, L.P. | BAKER FELIX Director | Director | Director | Director | Director | Director | 4 | Non-Voting Common Stock Derivative · Indirect · See Footnotes | P Open market or private purchase of non-derivative or derivative security | +413,175 834,707 owned after | $8.00 | 2023-06-28 | |
| 2023-06-26 | BAKER JULIAN | BAKER BROS. ADVISORS LP | Baker Brothers Life Sciences LP | Baker Bros. Advisors (GP) LLC | 667, L.P. | BAKER FELIX Director | Director | Director | Director | Director | Director | 4 | Non-Voting Common Stock Derivative · Indirect · See Footnotes | P Open market or private purchase of non-derivative or derivative security | +5,211,825 9,886,217 owned after | $8.00 | 2023-06-28 | |
| 2022-10-03 | Green Jeremy | Redmile Group, LLC 10% Owner | Director, 10% Owner | 4 | Non-Voting Common Stock Derivative · Indirect · See Footnotes | J Other acquisition or disposition (describe transaction) | +297,801 4,500,225 owned after | $22.49 | 2022-10-05 | |
| 2022-10-03 | Green Jeremy | Redmile Group, LLC 10% Owner | Director, 10% Owner | 4 | Non-Voting Common Stock Derivative · Indirect · See Footnotes | J Other acquisition or disposition (describe transaction) | −297,801 4,500,225 owned after | $22.49 | 2022-10-05 | |
| 2022-04-01 | Topsoe Jakob Haldor Director, 10% Owner | 4 | Non-Voting Common Stock Derivative · Indirect · See footnote | P Open market or private purchase of non-derivative or derivative security | +1,086,957 3,356,795 owned after | $23.00 | 2022-04-05 | |
| 2022-04-01 | Topsoe Christina Teng Director, 10% Owner | 4 | Non-Voting Common Stock Derivative · Indirect · See footnote | P Open market or private purchase of non-derivative or derivative security | +1,086,957 3,356,795 owned after | $23.00 | 2022-04-05 | |
| 2022-04-01 | Topsoe Holding A/S 10% Owner | 4 | Non-Voting Common Stock Derivative · Direct | P Open market or private purchase of non-derivative or derivative security | +1,086,957 3,356,795 owned after | $23.00 | 2022-04-05 | |
| 2022-04-01 | 667, L.P. | BAKER FELIX | Baker Brothers Life Sciences LP | Baker Bros. Advisors (GP) LLC | BAKER JULIAN | BAKER BROS. ADVISORS LP Director, 10% Owner | Director, 10% Owner | Director, 10% Owner | Director, 10% Owner | Director, 10% Owner | Director, 10% Owner | 4 | Non-Voting Common Stock Derivative · Indirect · See Footnotes | P Open market or private purchase of non-derivative or derivative security | +233,590 421,532 owned after | $23.00 | 2022-04-05 | |
| 2022-04-01 | 667, L.P. | BAKER FELIX | Baker Brothers Life Sciences LP | Baker Bros. Advisors (GP) LLC | BAKER JULIAN | BAKER BROS. ADVISORS LP Director, 10% Owner | Director, 10% Owner | Director, 10% Owner | Director, 10% Owner | Director, 10% Owner | Director, 10% Owner | 4 | Non-Voting Common Stock Derivative · Indirect · See Footnotes | P Open market or private purchase of non-derivative or derivative security | +2,592,497 4,674,392 owned after | $23.00 | 2022-04-05 | |
| 2022-04-01 | Green Jeremy | Redmile Group, LLC 10% Owner | Director, 10% Owner | 4 | Non-Voting Common Stock Derivative · Indirect · See Footnotes | P Open market or private purchase of non-derivative or derivative security | +2,608,695 4,500,225 owned after | $23.00 | 2022-04-04 | |
| 2019-09-20 | Redmile Group, LLC | Green Jeremy Director, 10% Owner | Director, 10% Owner | 4 | Non-Voting Common Stock Derivative · Indirect · See Footnote | C Conversion of derivative security | +1,891,530 1,891,530 owned after | $0.00 | 2019-09-23 | |
| 2019-09-20 | Topsoe Jakob Haldor Director, 10% Owner | 4 | Non-Voting Common Stock Derivative · Indirect · See footnote | C Conversion of derivative security | +2,269,838 2,269,838 owned after | $0.00 | 2019-09-20 | |
| 2019-09-20 | Topsoe Christina Teng Director, 10% Owner | 4 | Non-Voting Common Stock Derivative · Indirect · See footnote | C Conversion of derivative security | +2,269,838 2,269,838 owned after | $0.00 | 2019-09-20 | |
| 2019-09-20 | Haldor Topsoe Holding A/S 10% Owner | 4 | Non-Voting Common Stock Derivative · Direct | C Conversion of derivative security | +2,269,838 2,269,838 owned after | $0.00 | 2019-09-20 | |
| 2019-09-20 | BAKER FELIX | 667, L.P. | Baker Brothers Life Sciences LP | Baker Bros. Advisors (GP) LLC | BAKER BROS. ADVISORS LP | BAKER JULIAN Director, 10% Owner | Director, 10% Owner | Director, 10% Owner | Director, 10% Owner | Director, 10% Owner | Director, 10% Owner | 4 | Non-Voting Common Stock Derivative · Indirect · See Footnotes | C Conversion of derivative security | +187,942 187,942 owned after | no price filed | 2019-09-20 | |
| 2019-09-20 | BAKER FELIX | 667, L.P. | Baker Brothers Life Sciences LP | Baker Bros. Advisors (GP) LLC | BAKER BROS. ADVISORS LP | BAKER JULIAN Director, 10% Owner | Director, 10% Owner | Director, 10% Owner | Director, 10% Owner | Director, 10% Owner | Director, 10% Owner | 4 | Non-Voting Common Stock Derivative · Indirect · See Footnotes | C Conversion of derivative security | +2,081,895 2,081,895 owned after | no price filed | 2019-09-20 | |
| 2019-09-20 | Topsoe Christina Teng Director, 10% Owner | 4 | Non-Voting Common Stock Derivative · Indirect · See footnote | C Conversion of derivative security | +2,269,838 2,269,838 owned after | $0.00 | 2019-09-19 |