| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Decker Lisa Lynn | CHIEF BUSINESS OFFICER | C/O IGM BIOSCIENCES, INC., 325 E. MIDDLEFIELD ROAD, MOUNTAIN VIEW | /s/ Misbah Tahir, by power of attorney | 20 Jun 2025 | 0001783056 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | IGMS | Common Stock | Sale | $1,140 | -951 | -1.3% | $1.20 | 72,578 | 16 Jun 2025 | Direct | F1, F2 |
| Id | Content |
|---|---|
| F1 | These shares were sold to cover tax withholding obligations in connection with the vesting of restricted stock units. |
| F2 | This transaction was executed in multiple trades at prices ranging from $1.17 to $1.22. The price reported above reflects the weighted average sale price. The Reporting Person undertakes to provide upon request by the staff of the Securities and Exchange Commission, the Issuer, or a security holder of the Issuer full information regarding the number of shares sold at each separate sale price. |