Layoffs at Seres Therapeutics
- Layoff events
- 3
- verified and sourced
- Roles reported
- At least 181
- events with no figure are not in this number
- Announced between
- Nov 2023 to Feb 2026
- Reported by
- Seres Therapeutics, U.S. Securities and Exchange Commission, Seres Therapeutics / U.S. Securities and Exchange Commission, and Fierce Biotech
This page records what we could verify and source. It is not a complete record of every job cut at Seres Therapeutics: a layoff nobody published and nobody sent us is a layoff that is not on this page.
| Company | What happened | Roles reported | Share of staff | Where | Announced | Sources |
|---|---|---|---|---|---|---|
| Seres Therapeutics |
Restructuring
Seres Therapeutics announced cost-reduction actions including an approximately 30% workforce reduction while pausing additional investment in its planned SER-155 Phase 2 study and prioritizing earlier-stage programs. |
21 | 31.8% | Company-wide | ||
| Seres Therapeutics |
Funding
Seres Therapeutics announced cost-reduction actions including an approximately 25% workforce reduction to extend its cash runway while seeking capital and other resources for SER-155. |
Not known | 25% | Company-wide |
3 sources for Seres Therapeutics |
|
| Seres Therapeutics |
Restructuring
Seres Therapeutics announced a workforce reduction affecting about 160 employees, approximately 41% of staff. |
160 | Not known | United States |
1 source for Seres Therapeutics |
Where this comes from
Every cut listed for Seres Therapeutics was entered by a person who checked it against a filing or a named report. Nothing is scraped and nothing publishes itself. What is not here is what we have not verified, not what did not happen.
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