Lisa Lynn Decker - 23 Jul 2025 Form 4 Insider Report for IGM Biosciences, Inc. (IGMS)

Role: CHIEF BUSINESS OFFICER
Signature: /s/ Misbah Tahir, by power of attorney
Issuer symbol: IGMS
Transactions as of: 23 Jul 2025
Net transactions value: -$5,612
Form type: 4
Filing time: 25 Jul 2025, 19:01:59 UTC
Previous filing: 20 Jun 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Decker Lisa Lynn	CHIEF BUSINESS OFFICER	C/O IGM BIOSCIENCES, INC., 3 EAST THIRD AVENUE, SUITE 200, SAN MATEO	/s/ Misbah Tahir, by power of attorney	25 Jul 2025	0001783056

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	IGMS	Common Stock	Sale	$5,612	-4,409	-6.1%	$1.27	68,169	23 Jul 2025	Direct	F1, F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

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 $1.27 to $1.275. 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.