---
schema_version: "secwatch.filing_event.v1"
accession: "0000950170-23-049922"
form_type: "8-K"
ticker: null
cik: "0001383701"
company_name: "Histogen Inc."
filed_at: "2023-09-26T23:59:59+00:00"
generated_at: "2026-06-10T08:38:06.694129+00:00"
event_type: "other_material"
sentiment: "negative"
materiality_score: 0.95
calibrated_materiality_score: 0.95
confidence: "high"
source: SEC EDGAR
---

# Histogen announces liquidation plan; Nasdaq to suspend trading Oct 5, 2023

## Summary
- Board approved plan of dissolution; all clinical programs discontinued and workforce reduced to 2 employees effective Sep 30, 2023.
- Nasdaq notified company on Sep 26, 2023 that it is deemed a 'public shell'; trading suspension effective Oct 5, 2023.
- Company will not request a hearing; delisting and deregistration via Form 25-NSE to follow.
- Stockholders must approve the Plan of Dissolution; no further timeline provided.

## SEC filing metadata
- accession: 0000950170-23-049922
- form_type: 8-K
- cik: 0001383701
- company_name: Histogen Inc.
- filed_at: 2023-09-26T23:59:59+00:00
- event_type: other_material
- sentiment: negative
- materiality_score: 0.95
- calibrated_materiality_score: 0.95
- confidence: high
- sec_items: 3.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1383701/000095017023049922/0000950170-23-049922-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1383701/000095017023049922/hsto-20230926.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000950170-23-049922
- JSON: https://secwatch.observer/filing/0000950170-23-049922.json
- Plain text: https://secwatch.observer/filing/0000950170-23-049922.txt

## Key facts
- Listing & Compliance Notices
  Histogen Inc. received a nasdaq delisting notice notice regarding other (rules 5101).
  - Exchange: nasdaq
  - Notice: delisting notice
  - Rules: 5101
  source text: September 26, 2023 by the Listing Qualifications Department (the “Staff”) of The Nasdaq Stock Market LLC (“Nasdaq”) that, based upon the Staff’s determination that the Company is a “public shell” as that term is defined in Nasdaq Listing Rule 5101, trading of the Company’s common stock will be suspended from trading at the opening of business on October 5, 2023 unless the Company timely requests a hearing before a Nasdaq Hearings Panel to address the deficiencies and present a plan to regain compliance. The Company does not plan to request a hearing and, therefore, expects that trading in the
  evidence_url: https://www.sec.gov/Archives/edgar/data/1383701/000095017023049922/0000950170-23-049922-index.htm

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