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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
855654	Immunogen Inc.	IMGN	Pharmaceutical Preparations (2834)	042726691

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1586965	J Mark Enyedy	C/O Immunogen, Inc. 830 Winter Street Waltham MA 02451	Chief Executive Officer	No	No	No	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	2024-02-02	51,234	$0.00	604,504	No	4	M	Direct
Common Stock	Disposition	2024-02-05	20,107	$29.28	584,397	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	M	Direct
No	4	S	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Restricted Stock Unit	Disposition	2024-02-02	51,234	$0.00	51,234	$0.00

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
102,466			No	4	M	Direct

Footnotes

Effected pursuant to a trading plan adopted on June 13, 2023 pursuant to Rule 10b5-1 under the Securities Exchange Act of 1934, as amended.
The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $29.25 to $29.31, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within these ranges.
Each restricted stock unit ("RSU") represents the contingent right to receive, upon vesting of the RSU, one share of the Issuer's common stock.
The RSUs were granted on 2/3/2023 and vest over a three-year period, with 33 1/3% of the RSUs vesting on each of the first three anniversaries of the date of grant, subject to continued service through each vesting date.