---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-25-021345"
form_type: "8-K"
ticker: "MCRB"
cik: "0001609809"
company_name: "Seres Therapeutics, Inc."
filed_at: "2025-02-06T23:59:59+00:00"
generated_at: "2026-05-27T01:40:02.111397+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.35
calibrated_materiality_score: 0.35
confidence: "high"
source: SEC EDGAR
---

# Seres Therapeutics appoints Hans-Juergen Woerle, M.D. to board, designated by Nestlé

## Summary
- Board expanded to nine directors; Woerle appointed as Class III director effective Feb 4, 2025.
- Woerle is Chief Medical Officer and Chief Scientific Officer at Nestlé Health Science since Nov 2018.
- Designated by Nestlé under Securities Purchase Agreement requiring Nestlé to hold ≥10% of shares.
- Initial option grant of 120k shares at $0.8056 strike, vesting over 4 years; annual retainer $45k plus $7.5k for committee service.
- Woerle also serves on Enterome SA board and previously Cerecin Inc. board.

## SEC filing metadata
- accession: 0001193125-25-021345
- form_type: 8-K
- ticker: MCRB
- cik: 0001609809
- company_name: Seres Therapeutics, Inc.
- filed_at: 2025-02-06T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.35
- calibrated_materiality_score: 0.35
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1609809/000119312525021345/0001193125-25-021345-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1609809/000119312525021345/d890486d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-25-021345
- JSON: https://secwatch.observer/filing/0001193125-25-021345.json
- Plain text: https://secwatch.observer/filing/0001193125-25-021345.txt

## Source-grounded claims
- claim_id: a2723be98f
  claim: Hans-Juergen Woerle, M.D. was appointed as Class III director at Seres Therapeutics, Inc..
  evidence_excerpt: appointed Hans-Juergen Woerle, M.D., as a Class III director of the Company, effective immediately.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1609809/000119312525021345/0001193125-25-021345-index.htm

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.