---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-21-231447"
form_type: "8-K"
ticker: "SYBX"
cik: "0001527599"
company_name: "SYNLOGIC, INC."
filed_at: "2021-07-30T23:59:59+00:00"
generated_at: "2026-06-30T00:21:33.647839+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.4
calibrated_materiality_score: 0.4
confidence: "high"
source: SEC EDGAR
---

# Synlogic CMO Richard Riese resigns voluntarily on July 29, 2021

## Summary
- Chief Medical Officer Richard Riese, M.D., Ph.D., resigned on July 29, 2021.
- Resignation was voluntary and not due to any disagreement with Synlogic.
- No successor or transition details were disclosed in the filing.

## SEC filing metadata
- accession: 0001193125-21-231447
- form_type: 8-K
- ticker: SYBX
- cik: 0001527599
- company_name: SYNLOGIC, INC.
- filed_at: 2021-07-30T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.4
- calibrated_materiality_score: 0.4
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1527599/000119312521231447/0001193125-21-231447-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1527599/000119312521231447/d72733d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-21-231447
- JSON: https://secwatch.observer/filing/0001193125-21-231447.json
- Plain text: https://secwatch.observer/filing/0001193125-21-231447.txt

## Key facts
- Executive change
  Richard Riese departed as Chief Medical Officer at SYNLOGIC, INC..
  - Action: tendered his resignation
  - Role: Chief Medical Officer
  source text: On July 29, 2021, Richard Riese, M.D., Ph.D., the Chief Medical Officer of Synlogic, Inc. (the "Company"), tendered his resignation.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1527599/000119312521231447/0001193125-21-231447-index.htm

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