Mary Beth Harler - Jul 19, 2024 Form 4 Insider Report for IGM Biosciences, Inc. (IGMS)

Role: Head, Research & Autoimmunity
Signature: /s/ Misbah Tahir, by power of attorney
Stock symbol: IGMS
Transactions as of: Jul 19, 2024
Transactions value $: $0
Form type: 4
Date filed: 7/23/2024, 08:38 PM
Previous filing: Jun 18, 2024
Next filing: Sep 17, 2024

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	IGMS	Common Stock	Award		+55K	+64.53%		140K	Jul 19, 2024	Direct	F1, F2
transaction	IGMS	Common Stock	Award		+25K	+17.83%		165K	Jul 19, 2024	Direct	F2, F3

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	IGMS	Stock Option (right to buy)	Disposed to Issuer		-200K	-100%		0	Jul 19, 2024	Common Stock	200K	$61.45	Direct	F2

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

Explanation of Responses:

Id	Content
F1	These securities are restricted stock units (RSUs). Each RSU represents a contingent right to receive one share of the Issuer's Common Stock. One-half of the RSUs shall vest on July 19, 2025 and one-eighth of the RSUs shall vest each three-month anniversary thereafter, provided that the Reporting Person remains a service provider through each vesting date.
F2	Pursuant to the Issuer's previously disclosed option exchange program, on July 19, 2024 the Issuer cancelled the Reporting Person's options to purchase 200,000 shares of the Issuer's Common Stock and in exchange issued RSU grants of 54,999 shares and 25,001 shares.
F3	These securities are RSUs. Each RSU represents a contingent right to receive one share of the Issuer's Common Stock. One-half of the RSUs shall vest on January 19, 2026 and one-twelfth of the RSUs shall vest each three-month anniversary thereafter, provided that the Reporting Person remains a service provider through each vesting date.