---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-25-332343"
form_type: "8-K"
ticker: "ACET"
cik: "0001720580"
company_name: "Adicet Bio, Inc."
filed_at: "2025-12-29T23:59:59+00:00"
generated_at: "2026-05-16T12:07:02.590213+00:00"
event_type: "other_material"
sentiment: "negative"
materiality_score: 0.65
calibrated_materiality_score: 0.65
confidence: "high"
source: SEC EDGAR
---

# Adicet Bio announces 1-for-16 reverse stock split effective Dec 30, 2025; reduces shares from ~153.3M to ~9.6M

## Summary
- Board approved 1-for-16 reverse split within previously authorized 1:5 to 1:30 range; effective 12:01 a.m. ET Dec 30, 2025.
- Outstanding shares drop from ~153.3 million to ~9.6 million; authorized shares unchanged at 300 million.
- Purpose: regain compliance with Nasdaq minimum bid price requirement for continued listing.
- No fractional shares issued; holders receive cash in lieu; proportional adjustments to equity plans and warrants.
- CUSIP number changes to 007002207; trading symbol remains ACET.

## SEC filing metadata
- accession: 0001193125-25-332343
- form_type: 8-K
- ticker: ACET
- cik: 0001720580
- company_name: Adicet Bio, Inc.
- filed_at: 2025-12-29T23:59:59+00:00
- event_type: other_material
- sentiment: negative
- materiality_score: 0.65
- calibrated_materiality_score: 0.65
- confidence: high
- sec_items: 5.03, 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1720580/000119312525332343/0001193125-25-332343-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1720580/000119312525332343/acet-20251226.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-25-332343
- JSON: https://secwatch.observer/filing/0001193125-25-332343.json
- Plain text: https://secwatch.observer/filing/0001193125-25-332343.txt

## Source-grounded claims
- claim_id: c3af50c57904024b0922a31768748e4747de0978
  claim: Adicet Bio, Inc.: Effective as of December 30, 2025, the Company filed a Certificate of Amendment to its Restated Certificate of Incorporation to effect a 1-for-16 reverse stock split of its common stock (effective 2025-12-30).
  evidence_excerpt: On December 26, 2025, Adicet Bio, Inc. (the “Company”) filed an amendment (the “Certificate of Amendment”) to its Restated Certificate of Incorporation, to effectuate a reverse stock split of the Company’s issued and outstanding shares of common stock, par value $0.0001 per share (the “Common Stock”).
  evidence_url: https://www.sec.gov/Archives/edgar/data/1720580/000119312525332343/0001193125-25-332343-index.htm

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