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 |
|---|---|---|---|---|---|---|
| Tahir Misbah | CHIEF FINANCIAL OF… | SELL | $1K–$15K | 9K | $1.27 | Jul 25, 2025 |
| Harler Mary Beth | CEO | SELL | $15K–$50K | 15K | $1.27 | Jul 25, 2025 |
| Decker Lisa Lynn | CHIEF BUSINESS OFF… | SELL | $1K–$15K | 4K | $1.27 | Jul 25, 2025 |
| Weber Steven | PRINCIPAL ACCOUNTI… | SELL | <$1K | 486 | $1.20 | Jun 21, 2025 |
| Tahir Misbah | CHIEF FINANCIAL OF… | SELL | $1K–$15K | 2K | $1.20 | Jun 21, 2025 |
| Harler Mary Beth | CEO | SELL | $1K–$15K | 2K | $1.20 | Jun 21, 2025 |
| Decker Lisa Lynn | CHIEF BUSINESS OFF… | SELL | $1K–$15K | 951 | $1.20 | Jun 21, 2025 |
| Weber Steven | PRINCIPAL ACCOUNTI… | SELL | $1K–$15K | 2K | $1.12 | May 16, 2025 |
| Weber Steven | PRINCIPAL ACCOUNTI… | SELL | $1K–$15K | 2K | $1.23 | Mar 18, 2025 |
| Tahir Misbah | CHIEF FINANCIAL OF… | SELL | $1K–$15K | 7K | $1.23 | Mar 18, 2025 |
| Harler Mary Beth | CEO | SELL | $1K–$15K | 7K | $1.23 | Mar 18, 2025 |
| Decker Lisa Lynn | CHIEF BUSINESS OFF… | SELL | $1K–$15K | 5K | $1.23 | Mar 18, 2025 |
| Weber Steven | PRINCIPAL ACCOUNTI… | SELL | $1K–$15K | 1K | $1.70 | Jan 17, 2025 |
| Weber Steven | PRINCIPAL ACCOUNTI… | SELL | $1K–$15K | 495 | $7.58 | Jun 18, 2024 |
| Takimoto Chris H | CHIEF MEDICAL OFFI… | SELL | $1K–$15K | 2K | $7.58 | Jun 18, 2024 |
| Takimoto Chris H | CHIEF MEDICAL OFFI… | GRANT | $15K–$50K | 3K | $5.02 | Jun 18, 2024 |
| Tahir Misbah | CHIEF FINANCIAL OF… | SELL | $1K–$15K | 2K | $7.58 | Jun 18, 2024 |
| Schwarzer Fred | CEO AND PRESIDENT | SELL | $15K–$50K | 4K | $7.58 | Jun 18, 2024 |
| Schwarzer Fred | CEO AND PRESIDENT | GRANT | $15K–$50K | 3K | $5.02 | Jun 18, 2024 |
| Keyt Bruce | CHIEF SCIENTIFIC O… | GRANT | $15K–$50K | 3K | $5.02 | Jun 18, 2024 |
| Keyt Bruce | CHIEF SCIENTIFIC O… | SELL | $1K–$15K | 1K | $7.58 | Jun 18, 2024 |
| Harler Mary Beth | Head | SELL | $1K–$15K | 2K | $7.58 | Jun 18, 2024 |
| Decker Lisa Lynn | CHIEF BUSINESS OFF… | SELL | $1K–$15K | 977 | $7.58 | Jun 18, 2024 |
| BAKER BROS. ADVISORS LP | Director | BUY | $1M+ | 395K | $8.67 | Mar 28, 2024 |
| Takimoto Chris H | Chief Medical Offi… | SELL | $1K–$15K | 1K | $6.21 | Dec 2, 2023 |
| Gauthier George | Chief Commercial O… | GRANT | $1K–$15K | 2K | $5.02 | Dec 2, 2023 |
| Gauthier George | Chief Commercial O… | SELL | $1K–$15K | 1K | $6.21 | Dec 2, 2023 |
| Decker Lisa Lynn | Chief Business Off… | SELL | $1K–$15K | 1K | $6.21 | Dec 2, 2023 |
| Tahir Misbah | CFO | SELL | $1K–$15K | 1K | $5.06 | Nov 30, 2023 |
| Tahir Misbah | CFO | GRANT | $1K–$15K | 234 | $11.71 | Nov 30, 2023 |
| Schwarzer Fred | CEO and President | SELL | $1K–$15K | 1K | $5.06 | Nov 30, 2023 |
| Keyt Bruce | Chief Scientific O… | SELL | $1K–$15K | 933 | $5.06 | Nov 30, 2023 |
| Gauthier George | Chief Commercial O… | SELL | $1K–$15K | 935 | $7.95 | Oct 3, 2023 |
| Gauthier George | Chief Commercial O… | SELL | $1K–$15K | 936 | $9.42 | Jul 6, 2023 |
| Topsoe Christina Teng | Director | GRANT | N/A | 738 | — | Jul 6, 2023 |
| Topsoe Christina Teng | Director | BUY | $15K–$50K | 3K | $9.32 | Jul 6, 2023 |
| Redmile Group, LLC | Director | BUY | $500K+ | 80K | $9.42 | Jul 4, 2023 |
| Redmile Group, LLC | Director | GRANT | N/A | 492 | — | Jul 4, 2023 |
| Redmile Group, LLC | Director | SELL | $500K+ | 80K | $9.42 | Jul 4, 2023 |
| Topsoe Jakob Haldor | Director | BUY | $50K–$100K | 7K | $9.17 | Jul 3, 2023 |
| Topsoe Jakob Haldor | Director | GRANT | N/A | 492 | — | Jul 3, 2023 |
| BEHRENS M KATHLEEN | Director | BUY | $500K+ | 113K | $8.00 | Jun 28, 2023 |
| Takimoto Chris H | Chief Medical Offi… | SELL | $15K–$50K | 1K | $12.31 | May 25, 2023 |
| Takimoto Chris H | Chief Medical Offi… | GRANT | $1K–$15K | 962 | $11.71 | May 25, 2023 |
| Tahir Misbah | CFO | SELL | $15K–$50K | 1K | $12.31 | May 25, 2023 |
| Tahir Misbah | CFO | GRANT | $1K–$15K | 398 | $11.71 | May 25, 2023 |
| Schwarzer Fred | CEO and President | GRANT | $1K–$15K | 960 | $11.71 | May 25, 2023 |
| Schwarzer Fred | CEO and President | SELL | $15K–$50K | 1K | $12.31 | May 25, 2023 |
| Keyt Bruce | Chief Scientific O… | SELL | $1K–$15K | 982 | $12.31 | May 25, 2023 |
| Keyt Bruce | Chief Scientific O… | GRANT | $1K–$15K | 960 | $11.71 | May 25, 2023 |
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