---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-22-032077"
form_type: "8-K"
ticker: "ACLX"
cik: "0001786205"
company_name: "Arcellx, Inc."
filed_at: "2022-02-09T23:59:59+00:00"
generated_at: "2026-06-27T09:39:22.442681+00:00"
event_type: "other_material"
sentiment: "positive"
materiality_score: 0.7
calibrated_materiality_score: 0.7
confidence: "high"
source: SEC EDGAR
---

# Arcellx closes IPO of 9.49M shares at $15/sh, gross proceeds $142.3M

## Summary
- IPO closed with 9,487,500 shares, including full exercise of underwriters' option for 1,237,500 shares.
- Gross proceeds of $142.3 million before underwriting discounts and offering expenses.
- Common stock began trading on Nasdaq on February 4, 2022 under ticker ACLX.
- Joint book-running managers: BofA Securities, SVB Leerink, Barclays, William Blair.
- Registration statement became effective on February 3, 2022.

## SEC filing metadata
- accession: 0001193125-22-032077
- form_type: 8-K
- ticker: ACLX
- cik: 0001786205
- company_name: Arcellx, Inc.
- filed_at: 2022-02-09T23:59:59+00:00
- event_type: other_material
- sentiment: positive
- materiality_score: 0.7
- calibrated_materiality_score: 0.7
- confidence: high
- sec_items: 5.03, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1786205/000119312522032077/0001193125-22-032077-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1786205/000119312522032077/d303972d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-22-032077
- JSON: https://secwatch.observer/filing/0001193125-22-032077.json
- Plain text: https://secwatch.observer/filing/0001193125-22-032077.txt

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