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Seres Therapeutics Inc (Nasdaq: MCRB) is a clinical-stage biotechnology leader developing microbiome therapies to treat dysbiosis-related conditions. This page provides investors and medical professionals with essential updates on FDA milestones, clinical trial progress, and strategic collaborations shaping the future of ecobiotic treatments.
Access authoritative reports on regulatory approvals, research breakthroughs, and financial developments in one centralized hub. Our curated news collection includes updates on VOWST commercialization, pipeline candidates like SER-155, and partnerships advancing microbiome science.
Key coverage areas include clinical trial results, manufacturing innovations, and peer-reviewed research insights. All content is verified through primary sources to ensure accuracy for investment analysis and medical decision-making.
Bookmark this page for real-time updates on Seres Therapeutics' progress in redefining microbiome-based healthcare solutions. Check back regularly for objective reporting on developments impacting both patient care and long-term corporate strategy.
Seres Therapeutics (NASDAQ: MCRB) reported Q2 2025 financial results and business updates. The company submitted a Phase 2 study protocol to FDA for SER-155, targeting bloodstream infection prevention in stem cell transplant patients. The planned study will enroll 248 participants with interim analysis expected within 12 months of initiation.
Key financial highlights include a net loss of $19.9 million in Q2 2025, reduced from $26.2 million in Q2 2024. The company received a $25 million payment from Nestlé Health Science in July 2025 and expects to fund operations into Q1 2026. Management changes include the appointment of Thomas DesRosier and Marella Thorell as co-CEOs, effective August 1, 2025.
Seres Therapeutics (NASDAQ: MCRB), a leading live biotherapeutics company, has scheduled its second quarter 2025 financial results and business updates conference call for August 6, 2025, at 8:30 a.m. ET.
The company will host both a conference call and live audio webcast. Investors can access the call by dialing 800-715-9871 (domestic) or 646-307-1963 (international) with conference ID 3641971. The webcast will be available in the "Investors and News" section of the Seres website and will remain archived for approximately 21 days.
Seres Therapeutics (NASDAQ:MCRB) announced a significant leadership transition as Thomas DesRosier and Marella Thorell are appointed co-CEOs, effective July 31, 2025, following current CEO Eric Shaff's departure. Both executives will retain their existing roles as Chief Legal Officer and Chief Financial Officer, respectively.
The company is actively engaging with multiple parties for potential business development and partnerships to secure additional capital for advancing SER-155, which has received Breakthrough Therapy designation. The drug showed promising Phase 1b results with a 77% relative risk reduction in bloodstream infections in patients undergoing allogeneic hematopoietic stem cell transplant (allo-HSCT).
Eric Shaff, who led Seres for a decade and achieved the first-ever FDA-approved oral microbiome therapy, will remain on the company's Board of Directors.
Seres Therapeutics (NASDAQ: MCRB) reported Q1 2025 financial results and provided updates on its lead candidate SER-155. The company plans to submit a Phase 2 study protocol to FDA for SER-155, targeting the prevention of bloodstream infections in patients undergoing allogeneic hematopoietic stem cell transplant. Previous Phase 1b data showed a 77% relative risk reduction in bloodstream infections.
Financial highlights include net income of $32.7 million for Q1 2025, compared to a net loss of $32.9 million in Q1 2024. The company had $58.8 million in cash as of March 31, 2025, with runway into Q1 2026. A $25 million payment from Nestlé is expected in July 2025. The company recently completed a 1-for-20 reverse stock split and regained Nasdaq compliance.
Seres Therapeutics announced three poster presentations at the upcoming 2025 Digestive Disease Week (DDW) Conference in San Diego. The company will showcase new research on live biotherapeutics for treating inflammatory and immune diseases, including ulcerative colitis and Crohn's disease.
The presentations include two new research posters focusing on:
- Characterization of IBD microbiomes to evaluate candidate biomarkers
- Biomarkers of microbiome disruption for patient selection in UC trials
A third poster will present previously disclosed results from the SER-155 Phase 1b study, which demonstrated positive outcomes in promoting intestinal barrier integrity and modulating inflammatory responses. Seres is actively seeking partnerships to advance their biotherapeutics development in inflammatory and immune diseases.
Seres Therapeutics (Nasdaq: MCRB), a leading live biotherapeutics company, has scheduled a conference call and live audio webcast for May 7, 2025, at 8:30 a.m. ET to discuss their first quarter 2025 financial results and provide business updates.
Investors can access the conference call by dialing 800-715-9871 (domestic) or 646-307-1963 (international) with conference ID 4618787. The webcast will be available in the 'Investors and News' section of the Seres website and will remain archived for approximately 21 days after the event.
Seres Therapeutics (MCRB) reported its Q4 and full year 2024 financial results, highlighting significant progress with SER-155, their live biotherapeutic candidate for preventing bloodstream infections in allogeneic hematopoietic stem cell transplant recipients.
Key developments include:
- SER-155 showed a 77% relative risk reduction in bloodstream infections in Phase 1b study
- FDA granted Breakthrough Therapy designation in December 2024
- Company plans to submit draft protocol for next study to FDA in Q2 2025
- Recent FDA feedback supports bloodstream infection reduction at day 30 post-HSCT as primary endpoint
Financial highlights: Net loss from continuing operations was $125.8M for 2024, compared to $190.1M in 2023. Cash position of $30.8M as of December 31, 2024, with expected funding into Q1 2026, including anticipated Nestlé payments.
Seres Therapeutics (MCRB) has scheduled a conference call and live audio webcast for March 13, 2025, at 8:30 a.m. ET to discuss their fourth quarter and full year 2024 financial results along with business updates. Interested participants can access the conference call by dialing 800-715-9871 (domestic) or 646-307-1963 (international) using conference ID 6331602. The webcast will be available in the Investors and News section of the Seres website, with a replay accessible approximately two hours after the event and archived for about 21 days.
Seres Therapeutics (MCRB) has received FDA feedback on its SER-155 development strategy for allogeneic hematopoietic stem cell transplant (allo-HSCT) patients. The FDA supported using reduction in bloodstream infections at 30 days post-HSCT as the primary endpoint for the next study, recommending it be a Phase 2 trial.
The company is considering either a Phase 2 or a Phase 2/3 design for operational efficiency and plans to submit the protocol to FDA in Q2 2024. The upcoming study will build on the successful Phase 1b Cohort 2 trial, which demonstrated a 77% relative risk reduction in bloodstream infections, reduced systemic antibiotic exposure, and lower febrile neutropenia incidence.
Seres is actively seeking a development partner for SER-155 in allo-HSCT and awaits additional FDA feedback on submitted clarification questions.
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