IGM Biosciences, Inc.
Total Trades
100
Buys
13
Sells
64
Largest Trade
N/A
Insiders
14
Institutional Funds
20
Inst. Value
$1M+
Activist Filings
26
Insider Trades
| Insider | Title | Type | Value | Shares | Price | Date |
|---|---|---|---|---|---|---|
| Gauthier George | Chief Commercial O… | SELL | $15K–$50K | 1K | $12.31 | May 25, 2023 |
| Decker Lisa Lynn | Chief Business Off… | SELL | $15K–$50K | 1K | $12.31 | May 25, 2023 |
| Decker Lisa Lynn | Chief Business Off… | GRANT | $1K–$15K | 961 | $11.71 | May 25, 2023 |
| Gauthier George | Chief Commercial O… | SELL | $1K–$15K | 935 | $12.60 | Apr 7, 2023 |
| Gauthier George | Chief Commercial O… | GRANT | N/A | 16K | — | Apr 7, 2023 |
| Takimoto Chris H | Chief Medical Offi… | SELL | $15K–$50K | 2K | $18.73 | Mar 16, 2023 |
| Tahir Misbah | CFO | SELL | $15K–$50K | 2K | $18.73 | Mar 16, 2023 |
| Keyt Bruce | Chief Scientific O… | SELL | $15K–$50K | 1K | $18.73 | Mar 16, 2023 |
| Gauthier George | Chief Commercial O… | SELL | $15K–$50K | 1K | $18.73 | Mar 16, 2023 |
| Decker Lisa Lynn | Chief Business Off… | SELL | $15K–$50K | 1K | $18.73 | Mar 16, 2023 |
| Takimoto Chris H | Chief Medical Offi… | SELL | $100K–$500K | 5K | $18.98 | Dec 21, 2022 |
| Tahir Misbah | CFO | SELL | $100K–$500K | 6K | $19.62 | Dec 21, 2022 |
| Schwarzer Fred | CEO and President | SELL | $100K–$500K | 12K | $18.98 | Dec 21, 2022 |
| Keyt Bruce | Chief Scientific O… | SELL | $100K–$500K | 5K | $18.98 | Dec 21, 2022 |
| Gauthier George | Chief Commercial O… | SELL | $50K–$100K | 4K | $18.98 | Dec 21, 2022 |
| Decker Lisa Lynn | Chief Business Off… | SELL | $15K–$50K | 2K | $18.98 | Dec 21, 2022 |
| Takimoto Chris H | Chief Medical Offi… | SELL | $15K–$50K | 877 | $21.57 | Nov 29, 2022 |
| Tahir Misbah | CFO | SELL | $15K–$50K | 877 | $21.57 | Nov 29, 2022 |
| Tahir Misbah | CFO | GRANT | $1K–$15K | 353 | $12.84 | Nov 29, 2022 |
| Schwarzer Fred | CEO and President | SELL | $15K–$50K | 1K | $21.57 | Nov 29, 2022 |
| Keyt Bruce | Chief Scientific O… | SELL | $15K–$50K | 877 | $21.57 | Nov 29, 2022 |
| Gauthier George | Chief Commercial O… | SELL | $15K–$50K | 1K | $21.57 | Nov 29, 2022 |
| Decker Lisa Lynn | Chief Business Off… | SELL | $15K–$50K | 1K | $21.57 | Nov 29, 2022 |
| BEHRENS M KATHLEEN | Director | BUY | $1M+ | 60K | $17.14 | Nov 10, 2022 |
| Keyt Bruce | Chief Scientific O… | EXERCISE | $15K–$50K | 25K | $0.93 | Oct 6, 2022 |
| Keyt Bruce | Chief Scientific O… | SELL | $500K+ | 25K | $22.84 | Oct 6, 2022 |
| LOBERG MICHAEL D | Director | GRANT | N/A | 533 | — | Oct 4, 2022 |
| LOBERG MICHAEL D | Director | BUY | $100K–$500K | 6K | $19.62 | Oct 4, 2022 |
| LOBERG MICHAEL D | Director | BUY | $100K–$500K | 7K | $20.89 | Sep 29, 2022 |
| Keyt Bruce | Chief Scientific O… | SELL | $100K–$500K | 25K | $19.34 | Sep 8, 2022 |
| Keyt Bruce | Chief Scientific O… | EXERCISE | $15K–$50K | 25K | $0.93 | Sep 8, 2022 |
| Keyt Bruce | Chief Scientific O… | SELL | $500K+ | 25K | $22.17 | Aug 22, 2022 |
| Keyt Bruce | Chief Scientific O… | EXERCISE | $15K–$50K | 25K | $0.93 | Aug 22, 2022 |
| Takimoto Chris H | Chief Medical Offi… | SELL | $15K–$50K | 938 | $17.10 | May 26, 2022 |
| Tahir Misbah | CFO | SELL | $15K–$50K | 950 | $17.10 | May 26, 2022 |
| Schwarzer Fred | CEO and President | SELL | $15K–$50K | 1K | $17.10 | May 26, 2022 |
| Keyt Bruce | Chief Scientific O… | SELL | $15K–$50K | 939 | $17.10 | May 26, 2022 |
| Gauthier George | Chief Commercial O… | SELL | $15K–$50K | 1K | $17.10 | May 26, 2022 |
| Decker Lisa Lynn | Chief Business Off… | SELL | $15K–$50K | 1K | $17.10 | May 26, 2022 |
| Topsoe Jakob Haldor | Director | BUY | $15K–$50K | 1K | $16.00 | May 24, 2022 |
| Topsoe Jakob Haldor | Director | BUY | $100K–$500K | 16K | $14.51 | May 16, 2022 |
| Topsoe Christina Teng | Director | BUY | $50K–$100K | 7K | $14.68 | May 16, 2022 |
| Keyt Bruce | Chief Scientific O… | SELL | $50K–$100K | 3K | $25.00 | Apr 8, 2022 |
| Keyt Bruce | Chief Scientific O… | EXERCISE | $1K–$15K | 3K | $0.93 | Apr 8, 2022 |
| LOBERG MICHAEL D | Director | BUY | $100K–$500K | 22K | $23.00 | Apr 5, 2022 |
| LOBERG MICHAEL D | Director | GRANT | N/A | 533 | — | Apr 5, 2022 |
| BEHRENS M KATHLEEN | Director | GRANT | N/A | 374 | — | Apr 5, 2022 |
| BEHRENS M KATHLEEN | Director | BUY | $1M+ | 61K | $23.00 | Apr 5, 2022 |
| Keyt Bruce | Chief Scientific O… | SELL | $100K–$500K | 8K | $28.50 | Apr 2, 2022 |
| Keyt Bruce | Chief Scientific O… | EXERCISE | $1K–$15K | 8K | $0.93 | Apr 2, 2022 |
Institutional Ownership
13F filings as of Jun 30, 2025 · 20 funds holding
| Fund | Shares | Value | Type |
|---|---|---|---|
| Sanofi | 1.4M | $1M+ | SH |
| MILLENNIUM MANAGEMENT LLC | 275K | $100K–$500K | SH |
| JANE STREET GROUP, LLC | 152K | $100K–$500K | SH |
| Eagle Bay Advisors LLC | 100K | $100K–$500K | SH |
| Vanguard Personalized Indexing Management, LLC | 15K | $15K–$50K | SH |
| Tower Research Capital LLC (TRC) | 13K | $15K–$50K | SH |
| CAPTRUST FINANCIAL ADVISORS | 13K | $1K–$15K | SH |
| Ground Swell Capital, LLC | 12K | $1K–$15K | SH |
| CWM, LLC | 11K | $1K–$15K | SH |
| MORGAN STANLEY | 9K | $1K–$15K | SH |
| AlphaQuest LLC | 7K | $1K–$15K | SH |
| China Universal Asset Management Co., Ltd. | 7K | $1K–$15K | SH |
| Mirae Asset Global Investments Co., Ltd. | 1K | $1K–$15K | SH |
| RAYMOND JAMES FINANCIAL INC | 1K | $1K–$15K | SH |
| ROYAL BANK OF CANADA | 1K | $1K–$15K | SH |
| Capital Advisors, Ltd. LLC | 776 | $1K–$15K | SH |
| GF FUND MANAGEMENT CO. LTD. | 716 | <$1K | SH |
| NISA INVESTMENT ADVISORS, LLC | 563 | <$1K | SH |
| OSAIC HOLDINGS, INC. | 400 | <$1K | SH |
| US BANCORP \DE\ | 17 | <$1K | SH |
Activist & 5%+ Owners
SC 13D/13G filings — investors holding 5%+ of outstanding shares
SC 13G/A · Nov 13, 2025
0.0%
0 shares
SC 13D/A · Aug 18, 2025
0.0%
0 shares
SC 13D/A · Aug 18, 2025
0.0%
0 shares
SC 13D/A · Aug 15, 2025
0.0%
0 shares
SC 13G · Jul 9, 2025
7.3%
2.5M shares
T. Rowe Price Associates, Inc.
SC 13G/A · Feb 14, 2025
10.5%
3.6M shares
T. Rowe Price Associates, Inc.
SC 13G/A · Feb 7, 2025
0.2%
66K shares
T. ROWE PRICE ASSOCIATES, INC. 52-0556948
SC 13G/A · Nov 14, 2024
11.8%
4.0M shares
SC 13G/A · Nov 12, 2024
2.4%
820K shares
SC 13G/A · Aug 2, 2024
9.9%
3.3M shares
SC 13D/A · Mar 28, 2024
12.4%
4.1M shares
T. ROWE PRICE ASSOCIATES, INC. 52-0556948
SC 13G/A · Feb 12, 2024
10.3%
3.4M shares
T. ROWE PRICE ASSOCIATES, INC. 52-0556948
SC 13G/A · Feb 12, 2024
9.9%
3.3M shares
SC 13G/A · Feb 9, 2024
9.4%
310.0M shares
SC 13D/A · Dec 15, 2023
11.4%
3.7M shares
SC 13D/A · Jul 19, 2023
31.8%
10.4M shares
SC 13D/A · Jun 28, 2023
9.9%
3.3M shares
SC 13D/A · Jun 28, 2023
10.0%
3.3M shares
SC 13D/A · Jun 13, 2023
10.3%
3.0M shares
T. ROWE PRICE ASSOCIATES, INC. 52-0556948
SC 13G/A · Feb 14, 2023
7.6%
2.2M shares
SC 13G/A · Feb 11, 2023
8.4%
2.5M shares
SC 13D/A · Oct 5, 2022
11.6%
3.4M shares
SC 13D/A · Apr 5, 2022
11.6%
3.2M shares
SC 13D/A · Apr 5, 2022
12.9%
3.4M shares
T. ROWE PRICE ASSOCIATES, INC. 52-0556948
SC 13G/A · Feb 14, 2022
9.1%
2.4M shares
SC 13G/A · Feb 11, 2022
5.8%
1.5M shares