Teresa L. Young

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	0.541	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
27 Oct 24	MCRB Seres Therapeutics	Common Stock	Option exercise	Acquire M	No	No	0	11,360	0.00	91,466
27 Oct 24	MCRB Seres Therapeutics	RSU Common Stock	Option exercise	Dispose M	No	No	0	11,360	0.00	0
16 Aug 24	MCRB Seres Therapeutics	Common Stock	Sell	Dispose S	No	Yes	0.84	728	611.52	80,106
15 Aug 24	MCRB Seres Therapeutics	Common Stock	Option exercise	Acquire M	No	No	0	2,656	0.00	80,834
15 Aug 24	MCRB Seres Therapeutics	RSU Common Stock	Option exercise	Dispose M	No	No	0	2,656	0.00	26,563
5 Aug 24	MCRB Seres Therapeutics	Common Stock	Sell	Dispose S	No	Yes	1.0839	24,480	26.53 k	78,178

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