---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-26-322160"
form_type: "8-K"
ticker: "SYBX"
cik: "0001527599"
company_name: "SYNLOGIC, INC."
filed_at: "2026-07-29T11:19:48+00:00"
generated_at: "2026-07-29T11:25:27.504114+00:00"
event_type: "m_and_a"
sentiment: "negative"
materiality_score: 0.9
calibrated_materiality_score: 0.9
confidence: "high"
source: SEC EDGAR
---

# Synlogic to merge with Caldera Therapeutics; Synlogic shareholders to own ~2.3% of combined company

## Summary
- Merger with Caldera; Synlogic shareholders to receive shares in new parent, owning ~2.3% on fully diluted basis.
- Caldera equityholders (pre-money) to own ~62.8%; concurrent $278M financing investors own ~34.9%.
- Synlogic valued at $18M (assuming $6M net cash); Caldera valued at $500M.
- Support agreements from 50.9% of Synlogic stockholders and 72.6% of Caldera stockholders.
- Warrant amendments reduce exercise price to $0.70/share and remove cash redemption right.

## SEC filing metadata
- accession: 0001193125-26-322160
- form_type: 8-K
- ticker: SYBX
- cik: 0001527599
- company_name: SYNLOGIC, INC.
- filed_at: 2026-07-29T11:19:48+00:00
- event_type: m_and_a
- sentiment: negative
- materiality_score: 0.9
- calibrated_materiality_score: 0.9
- confidence: high
- sec_items: 1.01, 3.03, 5.01, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1527599/000119312526322160/0001193125-26-322160-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1527599/000119312526322160/d91010d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-26-322160
- JSON: https://secwatch.observer/filing/0001193125-26-322160.json
- Plain text: https://secwatch.observer/filing/0001193125-26-322160.txt

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