---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-22-281337"
form_type: "8-K"
ticker: "ACLX"
cik: "0001786205"
company_name: "Arcellx, Inc."
filed_at: "2022-11-09T23:59:59+00:00"
generated_at: "2026-06-22T01:46:10.418015+00:00"
event_type: "other_material"
sentiment: "negative"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# Arcellx overstates R&D expense by $6.3M in Q1 2022, $7.7M in H1 2022; prior financials non-reliable

## Summary
- Audit Committee concludes Q1 and Q2 2022 financials no longer reliable due to R&D expense accounting errors.
- R&D expense overstated by $6.3M in Q1 2022 and $7.7M in first half of 2022; no impact on cash or cash flows.
- Material weakness in internal control over financial reporting related to R&D expense accounting.
- Company to file amended Form 10-Q/As for Q1 and Q2 2022, expects to file concurrently with Q3 2022 10-Q.
- Cash position unchanged: $210.9M as of March 31, 2022 and $307.0M as of June 30, 2022.

## SEC filing metadata
- accession: 0001193125-22-281337
- form_type: 8-K
- ticker: ACLX
- cik: 0001786205
- company_name: Arcellx, Inc.
- filed_at: 2022-11-09T23:59:59+00:00
- event_type: other_material
- sentiment: negative
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 4.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1786205/000119312522281337/0001193125-22-281337-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1786205/000119312522281337/d421011d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-22-281337
- JSON: https://secwatch.observer/filing/0001193125-22-281337.json
- Plain text: https://secwatch.observer/filing/0001193125-22-281337.txt

## Key facts
- Auditor Changes
  Arcellx, Inc. reported that prior financial statements should not be relied upon.
  - Action: non reliance
  source text: the Audit Committee of the Board of Directors of Arcellx, Inc., after discussion with management, concluded that (i) the Q1 2022 Financial Statements, included in the Company’s Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission (the “ SEC ”) on May 12, 2022, and (ii) the Q2 2022 Financial Statements included in the Quarterly Report on Form 10-Q filed with the SEC on August 15, 2022 should no longer be relied upon.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1786205/000119312522281337/0001193125-22-281337-index.htm

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