Seres Therapeutics, INC

Market Movers (8-K)

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NASDAQ
Seres Therapeutics announced second quarter 2026 financial results, highlighting positive clinical data for its SER-155 program in immune checkpoint inhibitor-related enterocolitis and detailing significant efforts to reduce operational costs.
Capital raise
NASDAQ
Seres Therapeutics has entered into a lease amendment and termination agreement to reduce its facilities footprint and ongoing costs, involving a cash payment and stock issuance.
Capital raise
NASDAQ
Seres Therapeutics stockholders approved an amendment to the 2025 Incentive Award Plan, increasing available shares, and ratified auditor appointment at the reconvened annual meeting.
Delay expected
NASDAQ
Seres Therapeutics announced encouraging top-line results from an investigator-sponsored trial evaluating SER-155 in patients with immune checkpoint inhibitor-related enterocolitis (irEC).
Capital raise
NASDAQ
Seres Therapeutics has amended its Nestlé asset purchase agreement and restructured its office lease to extend its cash runway into Q1 2027.
Capital raise
NASDAQ
Seres Therapeutics, Inc. announced the resignation of Dr. Hans-Juergen Woerle from its board of directors, effective May 31, 2026.

Quarterly Earnings (10-Q)

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NASDAQ
Seres Therapeutics reported a net loss for the period and highlighted substantial doubt regarding its ability to continue as a going concern, necessitating additional funding.
Worse than expected
Capital raise
NASDAQ
Seres Therapeutics filed its Q1 2026 Form 10-Q, detailing a net loss of $19.9 million and highlighting ongoing efforts to secure additional funding while pausing investment in the SER-155 Phase 2 study.
Worse than expected
Delay expected
Capital raise
NASDAQ
Seres Therapeutics reports Q3 2025 net income driven by VOWST sale proceeds, but faces substantial doubt about its ability to continue as a going concern beyond Q2 2026 without additional funding.
Worse than expected
Capital raise
Delay expected
NASDAQ
Seres Therapeutics reported a net income for the first half of 2025 driven by the VOWST business sale, but faces substantial doubt about its ability to continue as a going concern without additional funding by Q1 2026.
Worse than expected
Capital raise
Delay expected
NASDAQ
Seres Therapeutics reports a net income of $32.7 million for Q1 2025, driven by the sale of its VOWST business, while focusing on the development of SER-155 and seeking strategic partnerships.
Better than expected
Capital raise
NASDAQ
Seres Therapeutics finalized the sale of its VOWST business to Nestl Health Science, shifting its focus to advancing its pipeline, particularly SER-155.
Worse than expected
Capital raise

Annual Reports (10-K)

NASDAQ
Seres Therapeutics, Inc. reports a strategic pivot towards inflammatory and immune diseases, pausing further investment in its lead infectious disease candidate SER-155's Phase 2 study due to funding needs, while detailing 2025 financial results including a net income from continuing operations.
Worse than expected
Capital raise
Delay expected
NASDAQ
Seres Therapeutics details its financial position and strategic shift following the sale of its VOWST business, emphasizing the development of SER-155 and other live biotherapeutic candidates.
Worse than expected
Capital raise
NASDAQ
Seres Therapeutics details its capital stock, reports a net loss of $113.7 million for 2023, and outlines strategic restructuring efforts.
Worse than expected
Capital raise

Insider Trading (Form 4)

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NASDAQ
Kelly Brady, See Remarks of Seres Therapeutics, Inc., sold 64 shares of common stock on August 15, 2026 for $4.55 per share.
NASDAQ
Eric D. Shaff, a Director of Seres Therapeutics, Inc., sold 263 shares of common stock on August 15, 2026 for $4.55 per share.
NASDAQ
Matthew R Henn, See Remarks of Seres Therapeutics, Inc., sold 81 shares of common stock on August 15, 2026 for $4.55 per share.
NASDAQ
Thomas Desrosier, See Remarks of Seres Therapeutics, Inc., sold 82 shares of common stock on August 15, 2026 for $4.55 per share.
NASDAQ
Kurt Graves, a Director at Seres Therapeutics, Inc., acquired stock options for 6,500 shares of common stock.
NASDAQ
Richard N. Kender, Director and Officer at Seres Therapeutics, acquired 50,000 stock options with an exercise price of $9.13.

Proxy Statements (Def-14A)

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NASDAQ
Seres Therapeutics, Inc. has announced its 2026 Annual Meeting of Stockholders, scheduled for June 9th, to address key corporate matters including director elections and equity plan amendments.
NASDAQ
Seres Therapeutics files a supplement to its proxy statement to correct an error in the calculation of total shareholder return (TSR) within the Executive Compensation section.
Worse than expected
NASDAQ
Seres Therapeutics is asking stockholders to approve a reverse stock split, an amended incentive award plan, and other corporate governance changes at its upcoming annual meeting.
Worse than expected
Capital raise
NASDAQ
Seres Therapeutics announces positive topline results from its SER-155 Phase 1b study, demonstrating a significant reduction in bloodstream infections and antibiotic use in patients undergoing allogeneic hematopoietic stem cell transplantation (allo-HSCT).
Better than expected
Delay expected
NASDAQ
Seres Therapeutics is selling its VOWST microbiome therapeutic business to Socit des Produits Nestl S.A. for an upfront payment and potential milestone payments, plus a profit share period.
Capital raise
NASDAQ
Seres Therapeutics discussed the sale of Vowst to Nestl, the upcoming SER-155 data readout, and the potential of its microbiome therapeutics platform at the Canaccord Genuity Growth Conference.

Schedule 13G - Passive Investments

NASDAQ
FMR LLC and Abigail P. Johnson have filed an Amendment No. 14 to Schedule 13G, reporting a beneficial ownership of 3.1% in Seres Therapeutics Inc. common stock as of June 30, 2025.
NASDAQ
FMR LLC and its Chairman and CEO, Abigail P. Johnson, have filed an amended Schedule 13G, reporting a 5.7% beneficial ownership stake in Seres Therapeutics Inc. as of May 30, 2025.
NASDAQ
FMR LLC and Abigail P. Johnson have filed an amended Schedule 13G, confirming their beneficial ownership of 12.8% of Seres Therapeutics Inc.'s common stock as of December 31, 2024.