---
schema_version: "secwatch.filing_event.v1"
accession: "0000950170-24-034854"
form_type: "8-K"
ticker: "SYBX"
cik: "0001527599"
company_name: "SYNLOGIC, INC."
filed_at: "2024-03-21T23:59:59+00:00"
generated_at: "2026-06-04T09:51:20.494401+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# Synlogic appoints James Flynn to board; three directors resign same week

## Summary
- James Flynn appointed as Class I director effective March 19; he manages Nerium Capital, a healthcare-focused investment fund.
- Flynn granted stock option for 4,000 shares and annual cash retainer of $40,000 (prorated).
- Three directors resigned March 20: Mike Burgess, Lisa Kelly-Croswell, Patricia N. Hurter; none due to disagreement.
- Resignations affect Audit, Compensation, Nominating & Governance, and Science & Technology committees.

## SEC filing metadata
- accession: 0000950170-24-034854
- form_type: 8-K
- ticker: SYBX
- cik: 0001527599
- company_name: SYNLOGIC, INC.
- filed_at: 2024-03-21T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.55
- calibrated_materiality_score: 0.55
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1527599/000095017024034854/0000950170-24-034854-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1527599/000095017024034854/sybx-20240319.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000950170-24-034854
- JSON: https://secwatch.observer/filing/0000950170-24-034854.json
- Plain text: https://secwatch.observer/filing/0000950170-24-034854.txt

## Key facts
- Executive change
  Patricia N. Hurter resigned as Director at SYNLOGIC, INC..
  - Action: resigned
  - Role: Director
  source text: On March 20, 2024, Patricia N. Hurter, Ph.D. notified the Board of her decision to resi
  evidence_url: https://www.sec.gov/Archives/edgar/data/1527599/000095017024034854/0000950170-24-034854-index.htm
- Executive change
  Mike Burgess resigned as Director at SYNLOGIC, INC..
  - Action: resigned
  - Role: Director
  source text: On March 20, 2024, Mike Burgess, MB, CHB, Ph.D notified the Board of his decision to resign from the Board and the Audit Committee and the Science and Technology Committee, effective immediately.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1527599/000095017024034854/0000950170-24-034854-index.htm
- Executive change
  Lisa Kelly-Croswell resigned as Director at SYNLOGIC, INC..
  - Action: resigned
  - Role: Director
  source text: On March 20, 2024, Lisa Kelly-Croswell notified the Board of her decision to resign from the Board and the Compensation Committee as well as the Nominating and Governance Committee, effective immediately.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1527599/000095017024034854/0000950170-24-034854-index.htm
- Executive change
  James Flynn was appointed as Class I Director at SYNLOGIC, INC..
  - Action: appointed
  - Role: Class I Director
  source text: appointed James Flynn effective March 19, 2024 (the “Effective Date”), as a director to the Board to serve as a Class I Director
  evidence_url: https://www.sec.gov/Archives/edgar/data/1527599/000095017024034854/0000950170-24-034854-index.htm

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