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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
1786442	Teng Christina Topsoe	C/O Igm Biosciences, Inc. 325 E. Middlefield Road Mountain View CA 94043		Yes	No	Yes	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Acquisiton	2023-06-30	3,000	$9.32	9,800	No	4	P	Indirect	See footnote
Common Stock	Acquisiton	2023-06-30	738	$0.00	39,443	No	4	A	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	P	Indirect	See footnote
No	4	A	Direct

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	10,400,564	Indirect	See footnote

Footnotes

This transaction was executed in multiple trades at prices ranging from $9.31 to $9.34. The price reported above reflects the weighted average purchase 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 purchased at each separate purchase price.
The shares are held by Pillarcater LLC. The Reporting Person is the sole manager of Pillarcater LLC, which is wholly owned by CT Foundation (a South Dakota Trust) of which the Reporting Person is the sole beneficiary.
Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock. The amount reflects payment of a quarterly retainer in common stock pursuant to the Issuer's Outside Director Compensation Policy.
The shares are held directly by Topsoe Holding A/S (formerly Haldor Topsoe Holding A/S). Jakob Haldor Topsoe, Christina Teng Topsoe, Anne Haugwitz-Hardenberg-Reventlow, Emil Oigaard, Thomas Schleicher and Birgitte Nielsen, members of the board of directors of Topsoe Holding A/S, may be deemed to share voting and investment power with respect to the shares reported herein and disclaim beneficial ownership of such shares, except to the extent of his or her pecuniary interest therein, if any.