MCRB

Recently announced 80% of SER-155 recipients achieved immunosuppressive-free clinical response at day 15 for immune checkpoint inhibitor-related enterocolitis (irEC) in the investigator-sponsored trial (IST) conducted by Memorial Sloan Kettering Cancer Center (MSK) IST data support SER-155 as a potential treatment for irEC that may allow patients to continue cancer therapy; Company evaluating irEC clinical development strategy in consultation with KOLs Seres engaging potential partners, seeking capital to advance its SER-155 programs, including for the prevention of bloodstream infections in patients undergoing allo-HCT and those experiencing irEC Seres announces agreement to exit additional leased space early, further reducing ongoing facility-related cash costs, which follows announcement of balance sheet strengthening and facilities cost reduction transactions in June 2026 CAMBRIDGE, Mass., Aug. 05, 2026 (GLOBE NEWSWIRE) -- Seres Therapeutics, Inc. (Nasdaq: MCRB), (Seres or the Company), a leading live biotherapeutics company, today reported second quarter 2026 financial results and provided business updates.

Seres Therapeutics NASDAQ: MCRB reported results from an investigator-sponsored study of SER-155 in immune checkpoint inhibitor-related enterocolitis, or irEC, saying the data support further evaluation of the live biotherapeutic as a potential non-immunosuppressive treatment option for cancer patients experiencing the gastrointestinal toxicity.

Seres Therapeutics, Inc. (MCRB) Discusses Promising SER-155 Clinical Trial Results for Immune Checkpoint Inhibitor Related Andropilatis Transcript

80% of SER-155 recipients achieved immunosuppressive-free clinical response of diarrhea (a primary symptom of irEC) at Day 15 in the Investigator-Sponsored Trial (IST) conducted by Memorial Sloan Kettering Cancer Center (MSK) SER-155 has potential to treat irEC, a frequent side effect of immune checkpoint inhibitors (ICIs) that often causes halting of cancer treatment, without requiring treatment with systemic immunosuppressive drugs SER-155 was well tolerated, with no drug-related serious adverse events observed Drug pharmacology data provide confirmatory evidence of Seres' live biotherapeutics operating as designed to repair the mucosal epithelial barrier and reduce gastrointestinal inflammation, which supports possible expansion into multiple other inflammatory and immune diseases Company to host webcast today, July 8, at 8:30 am ET CAMBRIDGE, Mass., July 08, 2026 (GLOBE NEWSWIRE) -- Seres Therapeutics, Inc. (Nasdaq: MCRB), (Seres or the Company), a leading live biotherapeutics company, today announced encouraging top-line results from an IST evaluating SER-155 in patients with irEC.

CAMBRIDGE, Mass., June 25, 2026 (GLOBE NEWSWIRE) -- Seres Therapeutics, Inc. (Nasdaq: MCRB), a leading live biotherapeutics company, today announced that it will host a webcast to discuss top-line results from an investigator-sponsored trial (IST) evaluating SER-155 in patients with immune checkpoint inhibitor-related enterocolitis, a serious and frequent side effect of immune checkpoint inhibitor cancer therapy.

Agreement with Nestlé Health Science provides $25 million payable to Seres in 2026 as a buy-out of potential future VOWST™ net sales-based milestones

CAMBRIDGE, Mass., May 12, 2026 (GLOBE NEWSWIRE) -- Seres Therapeutics, Inc. (Nasdaq: MCRB), a leading live biotherapeutics company, today announced that management will attend the upcoming H.C.

Clinical readout from investigator-sponsored SER-155 study in immune checkpoint inhibitor-related enterocolitis expected in the coming weeks Seres maintains operational focus on advancing live biotherapeutic programs in inflammatory and immune diseases Company pursuing partnerships and other sources of capital to support continued development of pipeline programs including SER-155 in allo-HSCT CAMBRIDGE, Mass., May 05, 2026 (GLOBE NEWSWIRE) -- Seres Therapeutics, Inc. (Nasdaq: MCRB), (Seres or the Company), a leading live biotherapeutics company, today reported first quarter 2026 financial results and provided business updates.

Data highlight both SER-603's rational design that targets microbial functions linked to mucosal healing and gastrointestinal inflammation in IBD, as well as the advancement of microbiome-based biomarkers that inform response to biologics and patient stratification

Pharmacologic data highlight durable GI microbiome modulation, with improvement in epithelial barrier integrity, following SER-155 administration