---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-25-073396"
form_type: "8-K"
ticker: null
cik: "0001656634"
company_name: "Gritstone bio, Inc."
filed_at: "2025-04-04T23:59:59+00:00"
generated_at: "2026-05-23T21:07:26.188380+00:00"
event_type: "other_material"
sentiment: "negative"
materiality_score: 0.9
calibrated_materiality_score: 0.9
confidence: "high"
source: SEC EDGAR
---

# Gritstone bio exits Chapter 11; all common stock cancelled, creditors receive new equity

## Summary
- Bankruptcy Court confirmed Second Modified Plan of Reorganization on April 3, 2025; effective April 4, 2025.
- All outstanding shares of common stock, options, and warrants cancelled; holders receive no recovery.
- Debt-to-equity conversion gives DIP lenders new equity in reorganized company; general unsecured creditors get liquidating trust distributions.
- Directors resigned effective upon plan effectiveness; company emerged with restructured balance sheet.
- Company filed to deregister securities under Exchange Act; stock now trades on OTC Pink under symbol GRTSQ.

## SEC filing metadata
- accession: 0001193125-25-073396
- form_type: 8-K
- cik: 0001656634
- company_name: Gritstone bio, Inc.
- filed_at: 2025-04-04T23:59:59+00:00
- event_type: other_material
- sentiment: negative
- materiality_score: 0.9
- calibrated_materiality_score: 0.9
- confidence: high
- sec_items: 1.03, 3.02, 3.03, 5.01, 5.02, 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1656634/000119312525073396/0001193125-25-073396-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1656634/000119312525073396/d916691d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-25-073396
- JSON: https://secwatch.observer/filing/0001193125-25-073396.json
- Plain text: https://secwatch.observer/filing/0001193125-25-073396.txt

## Key facts
- Distress & Bankruptcy
  Gritstone bio, Inc. entered chapter 11 in United States Bankruptcy Court for the District of Delaware (petition 2024-10-10).
  - Proceeding: chapter 11
  - Court: United States Bankruptcy Court for the District of Delaware
  - Petition: 2024-10-10
  source text: As previously reported, on October 10, 2024, Gritstone bio, Inc. (the “ Company ”) filed a voluntary petition for relief under Chapter 11 of Title 11 of the United States Code (the “ Bankruptcy Code ”) in the United States Bankruptcy Court for the District of Delaware (the “ Bankruptcy Court ”), thereby commencing a Chapter 11 case for the Company (the “ Chapter 11 Case ”).
  evidence_url: https://www.sec.gov/Archives/edgar/data/1656634/000119312525073396/0001193125-25-073396-index.htm

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