---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-22-307331"
form_type: "8-K"
ticker: "ACLX"
cik: "0001786205"
company_name: "Arcellx, Inc."
filed_at: "2022-12-16T23:59:59+00:00"
generated_at: "2026-06-21T03:29:15.901732+00:00"
event_type: "other"
sentiment: "neutral"
materiality_score: 0.1
calibrated_materiality_score: 0.1
confidence: "high"
source: SEC EDGAR
---

# Arcellx amends and restates bylaws to update director nomination procedures and conform to Delaware law

## Summary
- Board amended and restated bylaws effective December 15, 2022, revising director nomination and stockholder proposal procedures.
- Requires stockholders nominating directors to provide evidence of Rule 14a-19 compliance no later than five business days before the meeting.
- Updates stockholder meeting procedures to conform to recent amendments to the Delaware General Corporation Law.
- Makes various updates to conform to current Delaware law, including ministerial and clarifying changes.

## SEC filing metadata
- accession: 0001193125-22-307331
- form_type: 8-K
- ticker: ACLX
- cik: 0001786205
- company_name: Arcellx, Inc.
- filed_at: 2022-12-16T23:59:59+00:00
- event_type: other
- sentiment: neutral
- materiality_score: 0.1
- calibrated_materiality_score: 0.1
- confidence: high
- sec_items: 5.03, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1786205/000119312522307331/0001193125-22-307331-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1786205/000119312522307331/d413893d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-22-307331
- JSON: https://secwatch.observer/filing/0001193125-22-307331.json
- Plain text: https://secwatch.observer/filing/0001193125-22-307331.txt

## Key facts
- Governance Changes
  Arcellx, Inc.: Amended and restated bylaws to revise director nomination procedures, stockholder meeting procedures, and other conforming updates effective immediately (effective 2022-12-15).
  - Change: bylaw amendment
  - Effective: 2022-12-15
  source text: On December 15, 2022, the Board of Directors (the “Board”) of Arcellx, Inc. (the “Company”) amended and restated the Company’s amended and restated bylaws, effective immediately.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1786205/000119312522307331/0001193125-22-307331-index.htm

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