---
schema_version: "secwatch.filing_event.v1"
accession: "0000950170-25-081607"
form_type: "8-K"
ticker: "BOLT"
cik: "0001641281"
company_name: "Bolt Biotherapeutics, Inc."
filed_at: "2025-06-04T23:59:59+00:00"
generated_at: "2026-05-19T23:57:55.012741+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# Bolt Biotherapeutics announces 1-for-20 reverse stock split effective June 6, 2025

## Summary
- Reverse stock split ratio 1:20 approved by board on May 27, 2025.
- Effective at 5:00pm ET on June 6, 2025; trading starts split-adjusted June 9.
- Ticker remains BOLT on Nasdaq Capital Market; new CUSIP 097702203.
- No fractional shares issued; cash paid in lieu of fractional shares.
- Par value unchanged at $0.00001; all shares and equity awards adjusted proportionally.

## SEC filing metadata
- accession: 0000950170-25-081607
- form_type: 8-K
- ticker: BOLT
- cik: 0001641281
- company_name: Bolt Biotherapeutics, Inc.
- filed_at: 2025-06-04T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.5
- calibrated_materiality_score: 0.5
- confidence: high
- sec_items: 8.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1641281/000095017025081607/0000950170-25-081607-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1641281/000095017025081607/bolt-20250604.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000950170-25-081607
- JSON: https://secwatch.observer/filing/0000950170-25-081607.json
- Plain text: https://secwatch.observer/filing/0000950170-25-081607.txt

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