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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1496323	Igm Biosciences Inc.	IGMS	Pharmaceutical Preparations (2834)	770349194

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1783056	Lynn Lisa Decker	C/O Igm Biosciences, Inc. 325 E. Middlefield Road Mountain View CA 94043	Chief Business Officer	No	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership
Common Stock	Acquisiton	2023-05-15	961	$11.71	42,440	No	5	A	Direct
Common Stock	Disposition	2023-05-23	1,244	$12.30	41,196	No	4	S	Direct
Common Stock	Disposition	2023-05-23	15	$13.01	41,181	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	5	A	Direct
No	4	S	Direct
No	4	S	Direct

Footnotes

The shares were acquired under the IGM Biosciences, Inc. 2019 Employee Stock Purchase Plan in a transaction that was exempt under both Rule 16b-3(d) and Rule 16b-3(c).
These shares were sold to cover tax withholding obligations in connection with the vesting of restricted stock units.
This transaction was executed in multiple trades at prices ranging from $12.00 to $12.95. 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.
This transaction was executed in multiple trades at prices ranging from $13.00 to $13.02. 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.