Arcellx, Inc.
43 SEC EDGAR filings indexed (CIK 0001786205) across 13 form types.
Filing profile
Arcellx, Inc. (ACLX) has 43 SEC filings indexed on SecFilingDex, across 13 form types filed over roughly 2 years, from April 10, 2024 to April 30, 2026. The filer is classified under Biological Products (SIC 2836).
Its most frequent disclosure is the 8-K (Material event) with 8 filings — Current report announcing a material event, such as an acquisition, executive change, or earnings release. 22 of these filings were disclosed in the twelve months to April 30, 2026. 11 of the 43 are amendments (a corrected or updated version of an earlier filing).
Disclosure mix
- 88-KMaterial event · event-driven
- 8Form 4Insider transaction · within 2 business days of transaction
- 610-QQuarterly report · quarterly
- 6SC 13G/A5%+ passive stake · event-driven
- 3Form 4/AInsider transaction · within 2 business days of transaction
- 210-KAnnual report · annual
- 2DEF 14AProxy statement · annual (pre-meeting)
- 2DEFA14ASEC filing
- 2Form 3Initial insider ownership · within 10 days of becoming an insider
- 1SC 13D/A5%+ activist stake · event-driven (within 10 days)
- 110-K/AAnnual report · annual
- 1SC 13G5%+ passive stake · event-driven
- 1SC 13D5%+ activist stake · event-driven (within 10 days)
Profile derived from 43 indexed filings; every figure traces to the filing records above, each linking back to its original SEC EDGAR document. Filing counts reflect SecFilingDex's current index, not the filer's complete EDGAR history.
All filings
- SC 13D/A5%+ activist stakeFiled · 0001072613-26-000356
- 8-KMaterial event · period of report Apr 28, 2026Filed · 0001104659-26-050318
- Form 4Insider transaction · period of report Apr 28, 2026Filed · 0001193125-26-187305
- Form 4Insider transaction · period of report Apr 28, 2026Filed · 0001193125-26-188029
- Form 4Insider transaction · period of report Apr 28, 2026Filed · 0001417976-26-000002
- Form 4Insider transaction · period of report Apr 28, 2026Filed · 0001572000-26-000002
- Form 4Insider transaction · period of report Apr 28, 2026Filed · 0001663771-26-000002
- Form 4Insider transaction · period of report Apr 28, 2026Filed · 0001670683-26-000002
- Form 4Insider transaction · period of report Apr 28, 2026Filed · 0001930862-26-000008
- Form 4Insider transaction · period of report Apr 28, 2026Filed · 0002018445-26-000002
- 10-K/AAnnual report · period of report Dec 31, 2025Filed · 0001193125-26-177460
- 10-KAnnual report · period of report Dec 31, 2025Filed · 0001193125-26-076876
- 8-KMaterial event · period of report Feb 22, 2026Filed · 0001193125-26-063955
- 8-KMaterial event · period of report Dec 6, 2025Filed · 0001193125-25-311276
- 8-KMaterial event · period of report Nov 5, 2025Filed · 0001193125-25-266866
- 10-QQuarterly report · period of report Sep 30, 2025Filed · 0001193125-25-266932
- 8-KMaterial event · period of report Aug 7, 2025Filed · 0000950170-25-105015
- 10-QQuarterly report · period of report Jun 30, 2025Filed · 0000950170-25-105064
- 8-KMaterial event · period of report May 28, 2025Filed · 0001193125-25-129522
- 8-KMaterial event · period of report May 14, 2025Filed · 0001193125-25-119506
- 10-QQuarterly report · period of report Mar 31, 2025Filed · 0000950170-25-067100
- 8-KMaterial event · period of report May 8, 2025Filed · 0001193125-25-116023
- DEF 14AProxy statement · period of report May 28, 2025Filed · 0001193125-25-084363
- DEFA14ASEC filingFiled · 0001193125-25-084364
- Form 3Initial insider ownership · period of report Mar 18, 2025Filed · 0001415889-25-008690
- Form 3Initial insider ownership · period of report Mar 18, 2025Filed · 0001415889-25-008691
- 10-KAnnual report · period of report Dec 31, 2024Filed · 0000950170-25-029150
- Form 4/AInsider transaction · period of report Jan 2, 2025Filed · 0001415889-25-001340
- Form 4/AInsider transaction · period of report Jan 2, 2025Filed · 0001415889-25-001341
- Form 4/AInsider transaction · period of report Jan 2, 2025Filed · 0001415889-25-001342
- SC 13G5%+ passive stakeFiled · 0001104659-24-122103
- SC 13G/A5%+ passive stakeFiled · 0001104659-24-119043
- SC 13G/A5%+ passive stakeFiled · 0001193125-24-258671
- SC 13G/A5%+ passive stakeFiled · 0000315066-24-002627
- SC 13D5%+ activist stakeFiled · 0001193125-24-254203
- SC 13G/A5%+ passive stakeFiled · 0002012383-24-003501
- 10-QQuarterly report · period of report Sep 30, 2024Filed · 0000950170-24-123442
- SC 13G/A5%+ passive stakeFiled · 0002012383-24-001312
- 10-QQuarterly report · period of report Jun 30, 2024Filed · 0000950170-24-094120
- 10-QQuarterly report · period of report Mar 31, 2024Filed · 0000950170-24-057007
- DEF 14AProxy statement · period of report May 24, 2024Filed · 0001193125-24-093275
- DEFA14ASEC filingFiled · 0001193125-24-093299
- SC 13G/A5%+ passive stakeFiled · 0000315066-24-001714
Authoritative source
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