---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-25-300824"
form_type: "8-K"
ticker: "SYBX"
cik: "0001527599"
company_name: "SYNLOGIC, INC."
filed_at: "2025-11-26T23:59:59+00:00"
generated_at: "2026-05-16T16:28:24.849723+00:00"
event_type: "regulatory"
sentiment: "negative"
materiality_score: 0.8
calibrated_materiality_score: 0.8
confidence: "high"
source: SEC EDGAR
---

# Nasdaq notifies Synlogic it is a public shell; delisting possible unless hearing succeeds

## Summary
- Nasdaq Staff believes Synlogic is a public shell, citing zero revenue, minimal R&D costs, and reduced operations since Feb 2024.
- Notice received Nov 21, 2025; company disagrees and intends to request a hearing to contest the Staff's determination.
- Hearing request automatically stays suspension/delisting pending outcome, but there is no assurance of a successful result.
- Quarterly reports for nine months 2025 show no revenue and only $16,000 in R&D expenses, per the Staff.

## SEC filing metadata
- accession: 0001193125-25-300824
- form_type: 8-K
- ticker: SYBX
- cik: 0001527599
- company_name: SYNLOGIC, INC.
- filed_at: 2025-11-26T23:59:59+00:00
- event_type: regulatory
- sentiment: negative
- materiality_score: 0.8
- calibrated_materiality_score: 0.8
- confidence: high
- sec_items: 3.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1527599/000119312525300824/0001193125-25-300824-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1527599/000119312525300824/sybx-20251121.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-25-300824
- JSON: https://secwatch.observer/filing/0001193125-25-300824.json
- Plain text: https://secwatch.observer/filing/0001193125-25-300824.txt

## Source-grounded claims
- claim_id: e8fe8990fa8764cd4deb0627ff1f1dabb8d0eeb9
  claim: SYNLOGIC, INC. received a nasdaq delisting notice notice regarding other.
  evidence_excerpt: November 21, 2025, Synlogic, Inc. (the “Company”) received a letter (the “Notice”) from the Listing Qualifications Department (the “Staff”) of The Nasdaq Stock Market LLC (“Nasdaq”) that stated the Staff’s belief that the Company is a “public shell” and that, therefore, the continued listing of its securities is no longer warranted in the view of the Staff. In the Notice, the Staff explained that it based this belief on its review of the Company’s public disclosures and materials submitted to the Staff by the Company. In addition, the Staff noted its belief is supported by the Company’s lack o
  evidence_url: https://www.sec.gov/Archives/edgar/data/1527599/000119312525300824/0001193125-25-300824-index.htm

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