---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-24-039969"
form_type: "8-K"
ticker: "SYBX"
cik: "0001527599"
company_name: "SYNLOGIC, INC."
filed_at: "2024-02-20T23:59:59+00:00"
generated_at: "2026-06-05T23:02:24.087611+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# Synlogic adopts one-year poison pill after unsolicited share accumulation; hires Ladenburg for strategic review

## Summary
- Rights plan triggered at 15% ownership (20% for passive institutional investors); expires Feb 20, 2025.
- Ladenburg Thalmann engaged as financial advisor to assist with strategic review to maximize shareholder value.
- Rights become exercisable at $12.00 per right; holders other than triggering party can buy shares at 50% discount.
- Grandfathering for existing holders above threshold; rights redeemable for $0.001 before trigger.
- Plan adopted following unsolicited stock accumulation by an unnamed investor.

## SEC filing metadata
- accession: 0001193125-24-039969
- form_type: 8-K
- ticker: SYBX
- cik: 0001527599
- company_name: SYNLOGIC, INC.
- filed_at: 2024-02-20T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 1.01, 3.03, 5.03, 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1527599/000119312524039969/0001193125-24-039969-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1527599/000119312524039969/d768289d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-24-039969
- JSON: https://secwatch.observer/filing/0001193125-24-039969.json
- Plain text: https://secwatch.observer/filing/0001193125-24-039969.txt

## Key facts
- Governance Changes
  SYNLOGIC, INC.: Filed Certificate of Designations for Series A Junior Participating Preferred Stock in connection with adoption of Rights Agreement (effective 2024-02-20).
  - Change: charter amendment
  - Effective: 2024-02-20
  source text: In connection with the adoption of the Rights Agreement, on February 20, 2024, the Company filed a Certificate of Designations, Preferences and Rights of Series A Junior Participating Preferred Stock (the “Certificate of Designations”), with the Secretary of State of the State of Delaware.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1527599/000119312524039969/0001193125-24-039969-index.htm
- Material Agreements
  SYNLOGIC, INC. entered into Rights Agreement with Equiniti Trust Company LLC (effective 2024-02-20).
  - Action: entry
  - Counterparty: Equiniti Trust Company LLC
  - Effective: 2024-02-20
  source text: the Company entered into a Rights Agreement (the “Rights Agreement”), dated as of February 20, 2024, between the Company and Equiniti Trust Company LLC, as rights agent.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1527599/000119312524039969/0001193125-24-039969-index.htm

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