---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-21-280730"
form_type: "8-K"
ticker: "SYBX"
cik: "0001527599"
company_name: "SYNLOGIC, INC."
filed_at: "2021-09-23T23:59:59+00:00"
generated_at: "2026-06-29T01:46:46.028831+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.7
calibrated_materiality_score: 0.7
confidence: "high"
source: SEC EDGAR
---

# Synlogic prices $45M public offering of 15M shares at $3.00 per share

## Summary
- Priced underwritten public offering of 15 million shares of common stock at $3.00 per share.
- Gross proceeds expected to be $45 million; net proceeds of approximately $42.3 million after discounts.
- Underwriters granted 30-day option to purchase up to an additional 2.25 million shares.
- Offering expected to close on or about September 27, 2021, subject to customary closing conditions.
- Jefferies and SVB Leerink are acting as joint book-running managers; Chardan as lead manager.

## SEC filing metadata
- accession: 0001193125-21-280730
- form_type: 8-K
- ticker: SYBX
- cik: 0001527599
- company_name: SYNLOGIC, INC.
- filed_at: 2021-09-23T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.7
- calibrated_materiality_score: 0.7
- confidence: high
- sec_items: 1.01, 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1527599/000119312521280730/0001193125-21-280730-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1527599/000119312521280730/d219285d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-21-280730
- JSON: https://secwatch.observer/filing/0001193125-21-280730.json
- Plain text: https://secwatch.observer/filing/0001193125-21-280730.txt

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