Thomas DesRosier

Date	Company	Security	Transaction	Code	Indirect	10b5-1	$Price	#Shares	$Value	#Remaining
18 Nov 24	MCRB Seres Therapeutics	Common Stock	Sell	Dispose S	No	Yes	0.5407	878	474.73	135,192
15 Nov 24	MCRB Seres Therapeutics	Common Stock	Option exercise	Acquire M	No	No	0	2,656	0.00	136,070
15 Nov 24	MCRB Seres Therapeutics	RSU Common Stock	Option exercise	Dispose M	No	No	0	2,656	0.00	23,907
28 Oct 24	MCRB Seres Therapeutics	Common Stock	Sell	Dispose S	No	Yes	0.6901	4,259	2.94 k	133,414
27 Oct 24	MCRB Seres Therapeutics	Common Stock	Option exercise	Acquire M	No	No	0	13,500	0.00	137,673
27 Oct 24	MCRB Seres Therapeutics	RSU Common Stock	Option exercise	Dispose M	No	No	0	13,500	0.00	0
16 Aug 24	MCRB Seres Therapeutics	Common Stock	Sell	Dispose S	No	Yes	0.84	873	733.32	124,173
15 Aug 24	MCRB Seres Therapeutics	Common Stock	Option exercise	Acquire M	No	No	0	2,656	0.00	125,046
15 Aug 24	MCRB Seres Therapeutics	RSU Common Stock	Option exercise	Dispose M	No	No	0	2,656	0.00	26,563
15 May 24	MCRB Seres Therapeutics	Common Stock	Sell	Dispose S	No	Yes	0.94	843	792.42	122,390

Data from 3, 4 and 5 filings. Values as filed, not updated for current price.