Form 4 Filing for Arcellx, Inc. - Insider Transactions

This filing details transactions made by Michelle Gilson, Chief Financial Officer of Arcellx, Inc. On April 15, 2026, Gilson acquired 36,000 shares of Common Stock at $8.66 per share and exercised stock options for the same amount of shares with a conversion price of $8.66. The following day, April 16, 2026, she acquired an additional 2,110 shares of Common Stock at $8.66 per share and exercised options for 2,110 shares. Following these transactions, Gilson directly owns 67,048 shares of Common Stock. Additionally, the filing notes that 5,000 shares of Common Stock are held indirectly by a family charitable foundation, over which Gilson has voting and investment power. The options exercised were granted under the Issuer's 2022 Equity Incentive Plan, with vesting commencing on May 23, 2022.