Arcellx CFO exercises options for 38,110 shares
Arcellx, Inc. chief financial officer Michelle Gilson exercised stock options to acquire 38,110 shares of Common Stock.
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Form Type
4
Rhea-AI Filing Summary
Arcellx, Inc. chief financial officer Michelle Gilson exercised stock options to acquire 38,110 shares of Common Stock. The options were exercised at an exercise price of $8.66 per share on two dates and were granted under Arcellx's 2022 Equity Incentive Plan.
After these exercises, she holds 67,048 Common Stock shares directly. In addition, a family charitable foundation, for which she serves as President and over whose securities she has voting and investment power, holds 5,000 Common Stock shares indirectly. No open-market purchases or sales were reported in this filing.
Insider Trade Summary
38,110 shares exercised/converted
Exercise
5 txns
Insider
Gilson Michelle
Role
CHIEF FINANCIAL OFFICER
| Type | Security | Shares | Price | Value |
|---|---|---|---|---|
| Exercise | Stock Option (right to buy) | 2,110 | $0.00 | $0.00 |
| Exercise | Common Stock | 2,110 | $8.66 | $18K |
| Exercise | Stock Option (right to buy) | 36,000 | $0.00 | $0.00 |
| Exercise | Common Stock | 36,000 | $8.66 | $312K |
| holding | Common Stock | -- | -- | -- |
Holdings After Transaction:
Stock Option (right to buy) — 40,205 contracts (Direct);
Common Stock — 67,048 shares (Direct);
Common Stock — 5,000 shares (Indirect, By Foundation)
Footnotes (2)
- F1. Shares held by a a family charitable foundation, of which the Reporting Person serves as the President. The Reporting Person has voting and investment power over all securities owned by the foundation.
- F2. Shares issued pursuant to the Issuer's 2022 Equity Incentive Plan (the "2022 Plan"). 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, twenty-five percent (25%) of the shares subject to the Option shall vest on the one (1) year anniversary of the Vesting Commencement Date, and one forty-eighth (1/48th) of the shares subject to the Option shall vest each month thereafter on the same day of the month as the Vesting Commencement Date (and if there is no corresponding day, on the last day of the month), "Vesting Commencement Date" shall mean May 23, 2022.
Key Figures
Options exercised: 38,110 shares
Exercise price: $8.66 per share
Direct holdings after transactions: 67,048 shares
+4 more
7 metrics
Options exercised
38,110 shares
Total Common Stock acquired via option exercises reported
Exercise price
$8.66 per share
Strike price for exercised stock options
Direct holdings after transactions
67,048 shares
Common Stock directly owned by CFO post-exercise
Indirect foundation holdings
5,000 shares
Common Stock held by family charitable foundation
Options exercised on 2026-04-15
36,000 shares
Common Stock underlying options exercised on April 15, 2026
Options exercised on 2026-04-16
2,110 shares
Common Stock underlying options exercised on April 16, 2026
Option expiration
May 23, 2032
Expiration date of the stock options exercised
Key Terms
Stock Option (right to buy), 2022 Equity Incentive Plan, Vesting Commencement Date, Service Provider, +1 more
5 terms
Stock Option (right to buy) financial
"security_title: Stock Option (right to buy)"
2022 Equity Incentive Plan financial
"Shares issued pursuant to the Issuer's 2022 Equity Incentive Plan"
Vesting Commencement Date financial
"“Vesting Commencement Date” shall mean May 23, 2022"
The vesting commencement date is the starting point when an employee begins earning ownership rights to their promised benefits, such as stock options or retirement contributions. Think of it like the day a savings account is opened—only after this date do the benefits start to grow and become fully available over time. It matters to investors because it marks when the clock begins ticking toward full ownership, affecting the timing and value of these benefits.
Service Provider financial
"subject to the Reporting Person continuing to be a Service Provider"
family charitable foundation financial
"Shares held by a a family charitable foundation"
FAQ
AI-generated questions and answers. How Rhea-AI works. Not financial advice.
What insider transaction did Arcellx (ACLX) report for its CFO?
Arcellx reported that CFO Michelle Gilson exercised stock options to acquire 38,110 Common Stock shares. These option exercises are compensation-related events, not open-market purchases or sales, and reflect conversion of options granted under the company’s 2022 Equity Incentive Plan.
At what price did the Arcellx (ACLX) CFO exercise her stock options?
The stock options were exercised at an exercise price of $8.66 per share. This price reflects the predetermined strike price of the options granted earlier under Arcellx’s 2022 Equity Incentive Plan, rather than the market price on the exercise dates.
What plan governed the Arcellx (ACLX) CFO’s exercised options?
The exercised options were issued under Arcellx’s 2022 Equity Incentive Plan. Vesting occurs with 25% of the option vesting one year after the May 23, 2022 vesting commencement date, and the remaining shares vesting monthly in equal installments thereafter, subject to continued service.
What is the structure of vesting for the Arcellx (ACLX) CFO’s options?
The option vests 25% on the one-year anniversary of the May 23, 2022 vesting commencement date. The remaining 75% then vests in 1/48th monthly installments on the same calendar day, provided the CFO continues as a service provider to Arcellx throughout each vesting date.
AI-generated analysis. How Rhea-AI works. Not financial advice.
