MPM ASSET MANAGEMENT LLC [Rocket]

Date	Name	Symbol	Type	Security	Shares	Price	Value	Reported
05/22/2023	TCR2 THERAPEUTICS INC.	TCRR	Exercise (in-the-money or at-the-money)	Common Stock Warrant (Right to Buy)	135.5k	$0.74	$100.3k	05/22/2023
05/22/2023	TCR2 THERAPEUTICS INC.	TCRR	Exercise (in-the-money or at-the-money)	Common Stock Warrant (Right To Buy)	42.8k	$0.74	$31.6k	05/22/2023
05/22/2023	TCR2 THERAPEUTICS INC.	TCRR	Sale	Common Stock	70.2k	$1.88	$131.9k	05/22/2023