Shaff Eric D. - Insider Non-Derivative Transactions at Seres Therapeutics, Inc. (MCRB) - (SEC)

Updated on January 3, 2026.

According to recent SEC insider information filed on Nov 15, 2025, Shaff Eric D.'s relationship to Seres Therapeutics, Inc. (MCRB) is Director, and currently has 11,330 shares of Common Stock.

The chart below shows the number of shares owned, and the table shows the recent insider transactions.

You can see similar information for other MCRB insiders.

Related Topics: SEC Topic List.

Data Source: SEC.

Shaff Eric D. - Insider Non-Derivative Transactions of MCRB Common Stock

Shaff Eric D. - Insider Non-Derivative Transactions at MCRB

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Date	Transaction	No. of Shares	Price Per Share	Shares Owned After Transactions
Nov 16, 2025	M -- (Common Stock)	390	0	10999
Nov 16, 2025	Sell -- (Common Stock)	217	17.3	11113
Nov 16, 2025	M -- (Common Stock)	331	0	11330
Aug 19, 2025	Sell -- (Common Stock)	217	16.65	10609
Aug 16, 2025	M -- (Common Stock)	391	0	10493
Aug 16, 2025	M -- (Common Stock)	333	0	10826
May 17, 2025	Sell -- (Common Stock)	220	7.28	10102
May 16, 2025	M -- (Common Stock)	390	0	9991
May 16, 2025	M -- (Common Stock)	331	0	10322
Feb 19, 2025	Sell -- (Common Stock)	12726	0.81	192039
Feb 16, 2025	M -- (Common Stock)	7813	0	178202
Feb 16, 2025	M -- (Common Stock)	26563	0	204765
Nov 19, 2024	Sell -- (Common Stock)	2505	0.54	170389
Nov 16, 2024	M -- (Common Stock)	7812	0	172894
Oct 29, 2024	Sell -- (Common Stock)	8748	0.69	165082
Oct 28, 2024	M -- (Common Stock)	27837	0	173830
Aug 17, 2024	Sell -- (Common Stock)	2518	0.84	145993
Aug 16, 2024	M -- (Common Stock)	7813	0	148511
May 16, 2024	Sell -- (Common Stock)	2435	0.94	140698
May 16, 2024	M -- (Common Stock)	7812	0	143133
Feb 17, 2024	Sell -- (Common Stock)	11549	1.08	135321
Feb 16, 2024	M -- (Common Stock)	31250	0	146870
Oct 31, 2023	Sell -- (Common Stock)	8552	1.35	115620
Oct 28, 2023	M -- (Common Stock)	27838	0	124172