Thomas Des Rosier Seres Therapeutics, Inc. (MCRB) insider trading activity

Thomas Des Rosier is of Seres Therapeutics, Inc.. Currently has a direct ownership of 7,623 shares of MCRB, which is worth approximately $135,765. The most recent transaction as insider was on Nov 15, 2025, when has been sold 76 shares (Common Stock) at a price of $17.3 per share, resulting in proceeds of $1,314. This information was disclosed in a Form 4 filing with the Securities and Exchange Commission (SEC).

Shares Held (Direct Ownership) 7.62K

2.25% 3M change

94.36% 12M change

Total Value Held $135,765

Thomas DesRosier Transaction History

Date	Transaction	Value	Shares Traded	Shares Held
Nov 15 2025	SELL Open market or private sale	$1,314 $17.3 p/Share	76 Reduced 0.99%	7,623 Common Stock
Nov 15 2025	BUY Exercise of conversion of derivative security	-	244 Added 3.07%	7,699 Common Stock
Aug 18 2025	SELL Open market or private sale	$1,265 $16.65 p/Share	76 Reduced 1.01%	7,455 Common Stock
Aug 15 2025	BUY Exercise of conversion of derivative security	-	244 Added 3.14%	7,531 Common Stock
May 15 2025	SELL Open market or private sale	$575 $7.28 p/Share	79 Reduced 1.07%	7,287 Common Stock
May 15 2025	BUY Exercise of conversion of derivative security	-	244 Added 3.21%	7,366 Common Stock
Feb 18 2025	SELL Open market or private sale	$3,483 $0.81 p/Share	4,300 Reduced 2.93%	142,456 Common Stock

Feb 15 2025	BUY Exercise of conversion of derivative security	-	11,564 Added 7.3%	146,756 Common Stock
Nov 18 2024	SELL Open market or private sale	$474 $0.54 p/Share	878 Reduced 0.65%	135,192 Common Stock
Nov 15 2024	BUY Exercise of conversion of derivative security	-	2,656 Added 1.91%	136,070 Common Stock
Oct 28 2024	SELL Open market or private sale	$2,938 $0.69 p/Share	4,259 Reduced 3.09%	133,414 Common Stock
Oct 27 2024	BUY Exercise of conversion of derivative security	-	13,500 Added 8.93%	137,673 Common Stock
Aug 16 2024	SELL Open market or private sale	$733 $0.84 p/Share	873 Reduced 0.7%	124,173 Common Stock
Aug 15 2024	BUY Exercise of conversion of derivative security	-	2,656 Added 2.08%	125,046 Common Stock
May 15 2024	SELL Open market or private sale	$792 $0.94 p/Share	843 Reduced 0.68%	122,390 Common Stock
May 15 2024	BUY Exercise of conversion of derivative security	-	2,656 Added 2.11%	123,233 Common Stock
Feb 16 2024	SELL Open market or private sale	$4,254 $1.08 p/Share	3,939 Reduced 3.16%	120,577 Common Stock
Feb 15 2024	BUY Exercise of conversion of derivative security	-	10,625 Added 7.86%	124,516 Common Stock
Oct 30 2023	SELL Open market or private sale	$5,610 $1.35 p/Share	4,156 Reduced 3.52%	113,891 Common Stock
Oct 27 2023	BUY Exercise of conversion of derivative security	-	13,501 Added 10.26%	118,047 Common Stock
Jul 05 2022	BUY Grant, award, or other acquisition	$200,000 $3.15 p/Share	63,492 Added 37.78%	104,546 Common Stock

Thomas Des Rosier

Cambridge, MA

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