---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-24-020937"
form_type: "8-K"
ticker: "ACLX"
cik: "0001786205"
company_name: "Arcellx, Inc."
filed_at: "2024-01-31T23:59:59+00:00"
generated_at: "2026-06-06T14:01:30.556547+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.25
calibrated_materiality_score: 0.25
confidence: "high"
source: SEC EDGAR
---

# Arcellx assigns Gaithersburg lease, moves HQ to Redwood City, CA

## Summary
- On Jan 30, 2024, Arcellx assigned its Gaithersburg, MD lease to a third-party sublessee.
- Company relocated headquarters to its existing office at 800 Bridge Parkway, Redwood City, CA.
- Lease assignment and HQ move effective immediately as of January 30, 2024.
- The Gaithersburg facility was the company's prior headquarters; Redwood City space already occupied.

## SEC filing metadata
- accession: 0001193125-24-020937
- form_type: 8-K
- ticker: ACLX
- cik: 0001786205
- company_name: Arcellx, Inc.
- filed_at: 2024-01-31T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.25
- calibrated_materiality_score: 0.25
- confidence: high
- sec_items: 1.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1786205/000119312524020937/0001193125-24-020937-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1786205/000119312524020937/d855900d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-24-020937
- JSON: https://secwatch.observer/filing/0001193125-24-020937.json
- Plain text: https://secwatch.observer/filing/0001193125-24-020937.txt

## Key facts
- Material Agreements
  Arcellx, Inc. entered into Assignment of Lease with a third party sublessee (effective 2024-01-30).
  - Action: entry
  - Agreement: lease
  - Counterparty: a third party sublessee
  - Effective: 2024-01-30
  source text: On January 30, 2024, Arcellx, Inc. (the “Company”) entered into an Assignment of Lease (the “Assignment”) with a third party sublessee, pursuant to which the Company agreed to transfer and assign to a sublessee all of its rights, title, and interest under that certain Lease Agreement, dated October 5, 2018, between TFG West Watkins Property, LLC and the Company, as amended (the “Lease”).
  evidence_url: https://www.sec.gov/Archives/edgar/data/1786205/000119312524020937/0001193125-24-020937-index.htm

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