Seres Therapeutics, Inc., a clinical-stage company, focuses on developing biotherapeutics for serious diseases. The company develops SER-155, an investigational oral live biotherapeutic to decolonize GI pathogens, enhance GI epithelial barrier integrity, and regulate immune response to prevent bacterial bloodstream infections, as well as other pathogen-associated negative clinical outcomes in patients undergoing allogeneic hematopoietic stem cell transplantation. It also develops SER-603, a LBP candidate optimized to treat disruptions in the GI microbiome and to improve GI mucosal barrier integrity through the inhibition of inflammatory bacteria and associated metabolites; and SER-147, a live biotherapeutic composition to prevent bacterial bloodstream and spontaneous bacterial peritonitis infections in patients with metabolic disease, including chronic liver disease. The company was formerly known as Seres Health, Inc. and changed its name to Seres Therapeutics, Inc. in May 2015. Seres Therapeutics, Inc. was incorporated in 2010 and is headquartered in Cambridge, Massachusetts. Show more

101 Cambridgepark Drive, Cambridge, MA, 02140, United States

https://www.serestherapeutics.com

Biotechnology

Healthcare

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Market Cap

72.05M

52 Wk Range

$6.56 - $29.98

Previous Close

$7.44

Open

$7.50

Volume

20,102

Day Range

$7.45 - $7.69

Enterprise Value

122.7M

Cash

29.83M

Avg Qtr Burn

-16.36M

Insider Ownership

11.77%

Institutional Own.

24.38%

Qtr Updated

03/31/26

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Drug & Indication	Stage & Event	Catalyst Date
VOWST (SER-109) Details Bacterial infection, Clostridioides difficile infection	Approved Quarterly sales	Some catalyst date You must sign up to see the catalyst details. You must sign up to see the catalyst details. You must sign up to see the catalyst details. You must sign up to see the catalyst details.Sign up now.
SER-155 Details Graft-versus-host disease , Intestinal infection	Phase 2 Update	Some catalyst date You must sign up to see the catalyst details. You must sign up to see the catalyst details. You must sign up to see the catalyst details. You must sign up to see the catalyst details.Sign up now.
SER-428 (Live Biotherapeutic) Details Prevention Of Antimicrobial-Resistant Infections In High-Risk ICU Patients	Phase 1b Initiation	Some catalyst date You must sign up to see the catalyst details. You must sign up to see the catalyst details. You must sign up to see the catalyst details. You must sign up to see the catalyst details.Sign up now.
SER-155 (Live Biotherapeutic) Details Immune Checkpoint Related Enterocolitis	Phase 1 Data readout	Some catalyst date You must sign up to see the catalyst details. You must sign up to see the catalyst details. You must sign up to see the catalyst details. You must sign up to see the catalyst details.Sign up now.
SER-603 (Microbiome Modulator) Details Inflammatory Bowel Disease	IND Submission	Some catalyst date You must sign up to see the catalyst details. You must sign up to see the catalyst details. You must sign up to see the catalyst details. You must sign up to see the catalyst details.Sign up now.
SER-401 Details Melanoma, Cancer	Failed Discontinued	Some catalyst date You must sign up to see the catalyst details. You must sign up to see the catalyst details. You must sign up to see the catalyst details. You must sign up to see the catalyst details.Sign up now.
SER-301 Details Inflammatory bowel disease, Ulcerative colitis	Failed Discontinued	Some catalyst date You must sign up to see the catalyst details. You must sign up to see the catalyst details. You must sign up to see the catalyst details. You must sign up to see the catalyst details.Sign up now.
SER-287 Details Inflammatory bowel disease, Ulcerative colitis	Failed Discontinued	Some catalyst date You must sign up to see the catalyst details. You must sign up to see the catalyst details. You must sign up to see the catalyst details. You must sign up to see the catalyst details.Sign up now.