Teresa L. Young

Date	Company	Security	Transaction	Code	Indirect	10b5-1	$Price	#Shares	$Value	#Remaining
18 Feb 25	MCRB Seres Therapeutics	Common Stock	Sell	Dispose S	No	Yes	0.8102	3,338	2.70 k	97,536
15 Feb 25	MCRB Seres Therapeutics	Common Stock	Option exercise	Acquire M	No	No	0	7,813	0.00	100,874
15 Feb 25	MCRB Seres Therapeutics	Common Stock	Option exercise	Acquire M	No	No	0	2,657	0.00	93,061
15 Feb 25	MCRB Seres Therapeutics	RSU Common Stock	Option exercise	Dispose M	No	No	0	7,813	0.00	23,437
15 Feb 25	MCRB Seres Therapeutics	RSU Common Stock	Option exercise	Dispose M	No	No	0	2,657	0.00	21,250
7 Feb 25	MCRB Seres Therapeutics	Stock Option Common Stock	Grant	Acquire A	No	No	0.782	650,000	508.30 k	650,000
18 Nov 24	MCRB Seres Therapeutics	Common Stock	Sell	Dispose S	No	Yes	0.541	735	397.64	90,404
15 Nov 24	MCRB Seres Therapeutics	Common Stock	Option exercise	Acquire M	No	No	0	2,656	0.00	91,139
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	2,983	2.06 k	88,483

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