Christopher Heery - Sep 29, 2025 Form 4 Insider Report for Arcellx, Inc. (ACLX)

Signature
Michelle Gilson
Stock symbol
ACLX
Transactions as of
Sep 29, 2025
Transactions value $
-$5,852
Form type
4
Date filed
9/29/2025, 07:39 PM
Previous filing
Sep 26, 2025
Next filing
Sep 30, 2025

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Heery Christopher CHIEF MEDICAL OFFICER C/O ARCELLX, INC., 800 BRIDGE PARKWAY, REDWOOD CITY Michelle Gilson 2025-09-29 0001789632

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction ACLX Common Stock Sale -$5.85K -73 -0.34% $80.16 21.7K Sep 29, 2025 Direct F1
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Buy Plan / Sale Plan: These are also open market purchases/sales of shares, but in this case the transaction is part of a trading plan. Rule 10b5-1 allows insiders to setup a trading plan to buy/sell stocks over a certain period of time. Since the purchases/sales are predetermined, this protects the insiders from violating insider trading law.

Transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c).

Explanation of Responses:

Id Content
F1 The sale of shares reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan entered into by the Reporting Person on March 23, 2025.