Arcellx, Inc. (ACLX) Insider Trading & SEC Filings

Updated Jul 16, 2026 · Last SEC filing 2026-04-28

Arcellx, Inc. (ACLX) has filed 11 SEC Form 4 insider transactions in the last 90 days, with the most recent on 2026-04-28. 1 Form 8-K material event filings were reported by ACLX in the last 90 days. InsiderAlpha tracks every ACLX SEC filing — Form 4, Form 144, and 8-K — in real time, including Rule 10b5-1 plan detection.

About Arcellx, Inc. (ACLX)

SIC classificationBiological Products, (No Diagnostic Substances) (SIC 2836)
SEC CIK0001786205

90-Day SEC Filing Activity

Form 4 filings (90d)11
Form 8-K filings (90d)1
Latest Form 4 filing2026-04-28

Recent ACLX Insider Transactions (Form 4)

DateInsiderRoleTransactionSharesPriceValueFiling
Gilson MichelleCHIEF FINANCIAL OFFICERJ — Other acquisition / disposition5.0K——SEC
Gilson MichelleCHIEF FINANCIAL OFFICERJ — Other acquisition / disposition67.0K——SEC
Behbahani AliInsiderJ — Other acquisition / disposition1.9K——SEC
Elghandour RamiSEE REMARKSJ — Other acquisition / disposition198.0K——SEC
Carroll JillInsiderJ — Other acquisition / disposition1.48M——SEC
Elghandour RamiSEE REMARKSJ — Other acquisition / disposition101.2K——SEC
Elghandour RamiSEE REMARKSJ — Other acquisition / disposition218.5K——SEC
Galligan Andrew HInsiderJ — Other acquisition / disposition5.0K——SEC
Lubner David CharlesInsiderJ — Other acquisition / disposition21.7K——SEC
Elghandour RamiSEE REMARKSJ — Other acquisition / disposition174.9K——SEC
Behbahani AliInsiderJ — Other acquisition / disposition2.7K——SEC
Heery ChristopherCHIEF MEDICAL OFFICERJ — Other acquisition / disposition23.7K——SEC
Gilson MichelleCHIEF FINANCIAL OFFICERM — Option exercise2.1K$8.66$18KSEC
Gilson MichelleCHIEF FINANCIAL OFFICERM — Option exercise36.0K$8.66$312KSEC
Gilson MichelleCHIEF FINANCIAL OFFICERG — Bona-fide gift5.0K$0.00—SEC

All transactions sourced from SEC EDGAR Form 4 filings for Arcellx, Inc. (ACLX). Updated in real time as new filings are submitted to the SEC.

Most-Active ACLX Insiders — Last 90 Days

InsiderForm 4 filingsTotal transaction value
Elghandour Rami19—
Gilson Michelle15$330K
Heery Christopher12—
Lubner David Charles8—
Patel Kavita5—

Recent ACLX Form 8-K Material Events

Recent Insider Filings

Form 4 Transaction Code Reference

SEC Form 4 transactions are reported with a one-letter code indicating the type of transaction. Common codes you'll see in ACLX insider filings:

POpen-market purchase by the insider
SOpen-market sale by the insider
AGrant, award, or other acquisition from the issuer
MExercise or conversion of derivative security (e.g. options)
FPayment of exercise price or tax liability via share withholding
GBona-fide gift of securities
DDisposition to the issuer (e.g. share buyback participation)
JOther acquisition or disposition
XExercise of in-the-money or at-the-money derivative security
CConversion of derivative security
VTransaction voluntarily reported earlier than required

ACLX Insider Trading — FAQ

What is the latest insider trade for ACLX?
Arcellx, Inc. (ACLX) had 11 insider filings in the last 90 days, with the most recent on 2026-04-28. InsiderAlpha tracks every Form 4, 10-K, 10-Q, and 8-K filing in real time.
How many insiders are buying ACLX stock?
0 insider purchases of ACLX were filed in the last 90 days.
How many insiders are selling ACLX stock?
0 insider sales of ACLX were filed in the last 90 days.
Where can I see ACLX SEC filings (Form 4, 10-K, 10-Q, 8-K)?
InsiderAlpha aggregates every ACLX SEC filing — Form 4 insider transactions, 10-K and 10-Q quarterly reports, and 8-K material event disclosures — in one timeline.

Related Companies — Recent Insider Activity

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