---
schema_version: "secwatch.filing_event.v1"
accession: "0000950170-24-139249"
form_type: "8-K"
ticker: "SYBX"
cik: "0001527599"
company_name: "SYNLOGIC, INC."
filed_at: "2024-12-23T23:59:59+00:00"
generated_at: "2026-05-28T23:35:41.940517+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.65
calibrated_materiality_score: 0.65
confidence: "high"
source: SEC EDGAR
---

# Synlogic CEO Antoine Awad leaves Dec 31; Mary Beth Dooley named new Principal Executive Officer and CFO

## Summary
- Antoine Awad's employment ends Dec 31, 2024; receives $218,856 lump-sum (6 months salary) plus $246,213 retention bonus.
- Mary Beth Dooley, Head of Finance, appointed Principal Executive Officer and Principal Financial Officer effective Jan 1, 2025.
- Dooley's base salary $325,000; 2024 target bonus 30% ($97,500); no bonus for 2025 or later.
- Awad enters consulting agreement at $350/hour; equity grants extended and accelerated on change in control or dissolution.

## SEC filing metadata
- accession: 0000950170-24-139249
- form_type: 8-K
- ticker: SYBX
- cik: 0001527599
- company_name: SYNLOGIC, INC.
- filed_at: 2024-12-23T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.65
- calibrated_materiality_score: 0.65
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1527599/000095017024139249/0000950170-24-139249-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1527599/000095017024139249/sybx-20241217.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000950170-24-139249
- JSON: https://secwatch.observer/filing/0000950170-24-139249.json
- Plain text: https://secwatch.observer/filing/0000950170-24-139249.txt

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