Gilson Michelle 4
4 · Arcellx, Inc. · Filed Feb 25, 2026
Insider Transaction Report
Form 4
Arcellx, Inc.ACLX
Gilson Michelle
CHIEF FINANCIAL OFFICER
Transactions
- Exercise/Conversion
Common Stock
[F1]2026-01-06+20,530→ 64,832 total - Sale
Common Stock
[F2][F3]2026-02-25$113.82/sh−11,219$1,276,954→ 33,938 total
Footnotes (3)
- [F1]Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock. Vesting of these RSUs previously reported in the Form 4 filed January 6, 2026.
- [F2]Represents a broker-assisted sale to satisfy the Reporting Person's tax withholding obligations in connection with the vesting of restricted stock units.
- [F3]Represents the weighted average share price of an aggregate total of 11,219 shares sold in the price range of $113.765 to $113.835 by the Reporting Person. The Reporting Person undertakes to provide upon request by the Commission staff, the issuer or a security holder of the issuer, full information regarding the number of shares sold at each separate price.
Signature
/s/ Michelle Gilson|2026-02-25