---
schema_version: "secwatch.filing_event.v1"
accession: "0000950170-23-073825"
form_type: "8-K"
ticker: "SYBX"
cik: "0001527599"
company_name: "SYNLOGIC, INC."
filed_at: "2023-12-29T23:59:59+00:00"
generated_at: "2026-06-07T05:50:02.228367+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.4
calibrated_materiality_score: 0.4
confidence: "high"
source: SEC EDGAR
---

# Synlogic amends CEO and COO severance agreements, extending change-in-control benefits

## Summary
- CEO Aoife Brennan's severance period extended from 12 to 18 months after a change-in-control termination.
- COO Antoine Awad's severance period extended from 6 to 12 months after a change-in-control termination.
- Both executives receive 100% target bonus lump sum, COBRA coverage up to 18/12 months, and accelerated equity vesting.
- Amendments executed December 26, 2023, and filed as Exhibits 10.1 and 10.2.

## SEC filing metadata
- accession: 0000950170-23-073825
- form_type: 8-K
- ticker: SYBX
- cik: 0001527599
- company_name: SYNLOGIC, INC.
- filed_at: 2023-12-29T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.4
- calibrated_materiality_score: 0.4
- confidence: high
- sec_items: 5.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1527599/000095017023073825/0000950170-23-073825-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1527599/000095017023073825/sybx-20231229.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000950170-23-073825
- JSON: https://secwatch.observer/filing/0000950170-23-073825.json
- Plain text: https://secwatch.observer/filing/0000950170-23-073825.txt

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