---
schema_version: "secwatch.filing_event.v1"
accession: "0000950170-25-083180"
form_type: "8-K"
ticker: "BOLT"
cik: "0001641281"
company_name: "Bolt Biotherapeutics, Inc."
filed_at: "2025-06-06T23:59:59+00:00"
generated_at: "2026-05-19T18:24:44.842927+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# Bolt Biotherapeutics effects 1-for-20 reverse stock split

## Summary
- Reverse stock split at 1-for-20 ratio effective June 6, 2025.
- Common stock begins trading on split-adjusted basis June 9, 2025 on Nasdaq under ticker BOLT.
- New CUSIP number is 097702203; par value unchanged at $0.00001 per share.
- No fractional shares issued; cash payment in lieu of fractional shares.
- Proportionate adjustments to outstanding stock options, equity plans, and warrants.

## SEC filing metadata
- accession: 0000950170-25-083180
- form_type: 8-K
- ticker: BOLT
- cik: 0001641281
- company_name: Bolt Biotherapeutics, Inc.
- filed_at: 2025-06-06T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.5
- calibrated_materiality_score: 0.5
- confidence: high
- sec_items: 5.03, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1641281/000095017025083180/0000950170-25-083180-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1641281/000095017025083180/bolt-20250606.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000950170-25-083180
- JSON: https://secwatch.observer/filing/0000950170-25-083180.json
- Plain text: https://secwatch.observer/filing/0000950170-25-083180.txt

## Key facts
- Governance Changes
  Bolt Biotherapeutics, Inc.: Filed a Certificate of Amendment to effect a one-for-twenty reverse stock split of common stock (effective 2025-06-06).
  - Change: charter amendment
  - Effective: 2025-06-06
  source text: On June 6, 2025, Bolt Biotherapeutics, Inc., a Delaware corporation (the “Company”), filed with the Secretary of State of the State of Delaware a Certificate of Amendment to the Company’s Certificate of Incorporation (the “Amendment”), to effect a one-for-twenty (1:20) reverse stock split of its outstanding common stock, effective as of June 6, 2025 (the “Reverse Stock Split”).
  evidence_url: https://www.sec.gov/Archives/edgar/data/1641281/000095017025083180/0000950170-25-083180-index.htm

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