* An asterisk sign (*) next to the price indicates that the price is likely invalid.
Explanation of Responses:
Id
Content
F1
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).
F2
The shares are held directly by the reporting person's spouse.
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