Harler Mary Beth

• Purchase • Sale • Planned purchase • Planned sale Net purchase Net sale Earnings

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Abbreviations B: Buy, S: Sell, PP: Planned purchase, PS: Planned sale, O: Option / Other

Notification date	Transaction date	B/S Transaction type	Nb. shares Price Value	Number of shares	Price	Value	Details
2025-03-18	2025-03-14	IGM Biosciences Inc (IGMS)	S Sale	7,329 -2.1% 1.23 USD 9,015	7,329 -2.1%	1.23	USD 9,015
2024-12-18	2024-12-16	IGM Biosciences Inc (IGMS)	S Sale	1,708 -0.5% 7.48 USD 12,776	1,708 -0.5%	7.48	USD 12,776
2024-09-17	2024-09-13	IGM Biosciences Inc (IGMS)	S Sale	1,487 -0.9% 11.54 USD 17,158	1,487 -0.9%	11.54	USD 17,158
2024-06-18	2024-06-14	IGM Biosciences Inc (IGMS)	S Sale	1,570 -1.8% 7.58 USD 11,893	1,570 -1.8%	7.58	USD 11,893