Gilson Michelle 4
4 · Arcellx, Inc. · Filed Jan 6, 2026
Insider Transaction Report
Form 4
Arcellx, Inc.ACLX
Gilson Michelle
CHIEF FINANCIAL OFFICER
Transactions
- Exercise/Conversion
Common Stock
2026-01-02+20,496→ 28,962 total - Exercise/Conversion
Common Stock
2026-01-03+15,340→ 44,302 total - Exercise/Conversion
Common Stock
2026-01-06+20,530→ 64,832 total - Award
Restricted Stock Unit
2026-01-02+88,542→ 88,542 total→ Common Stock (88,542 underlying) - Exercise/Conversion
Restricted Stock Unit
2026-01-02−20,496→ 20,496 total→ Common Stock (20,496 underlying) - Exercise/Conversion
Restricted Stock Unit
2026-01-03−15,340→ 0 total→ Common Stock (15,340 underlying) - Exercise/Conversion
Restricted Stock Unit
2026-01-06−20,530→ 61,590 total→ Common Stock (20,530 underlying)
Footnotes (5)
- [F1]Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.
- [F2]Subject to the Reporting Person continuing to be a Service Provider (as defined in the Issuer's 2022 Equity Incentive Plan) through each applicable vesting date, one-fourth (1/4th) of the RSUs subject to the award will vest each year following the RSU Grant Date on the same day of the month as the RSU Grant Date (or, if there is no corresponding day in a particular month, then the last day of the month) over four (4) years. "RSU Grant Date" shall mean January 2, 2026.
- [F3]Subject to the Reporting Person continuing to be a Service Provider (as defined in the Issuer's 2022 Equity Incentive Plan) through each applicable vesting date, one-third (1/3rd) of the RSUs subject to the award will vest each year following the RSU Grant Date on the same day of the month as the RSU Grant Date (or, if there is no corresponding day in a particular month, then the last day of the month) over three (3) years. "RSU Grant Date" shall mean January 2, 2024.
- [F4]Subject to the Reporting Person continuing to be a Service Provider (as defined in the Issuer's 2022 Equity Incentive Plan) through each applicable vesting date, one-third (1/3rd) of the RSUs subject to the award will vest each year following the RSU Grant Date on the same day of the month as the RSU Grant Date (or, if there is no corresponding day in a particular month, then the last day of the month) over three (3) years. "RSU Grant Date" shall mean January 3, 2023.
- [F5]Subject to the Reporting Person continuing to be a Service Provider (as defined in the Issuer's 2022 Equity Incentive Plan) through each applicable vesting date, one-fourth (1/4th) of the RSUs subject to the award will vest each year following the RSU Grant Date on the same day of the month as the RSU Grant Date (or, if there is no corresponding day in a particular month, then the last day of the month) over four (4) years. "RSU Grant Date" shall mean January 6, 2025.