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Insider Trading Arrangements - George Kemble, Ph.D.,
 3 Months Ended
Sep. 30, 2025
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Trading Arrangements, by Individual  
Material Terms of Trading Arrangement
●On August 21, 2025, George Kemble, our Chairman of the Board, adopted a Rule 10b5-1 trading plan providing for the sale of up to 371,193 shares of Series A common stock vested under outstanding stock options and 75,376 shares of Series A common stock vested under restricted stock units. Mr. Kemble’s Rule 10b5-1 trading plan will remain in effect until the earlier of (i) July 23, 2027; or (ii) the date on which the aggregate 446,569 shares of Series A common stock have been sold under the 10b5-1 trading plan. This trading plan was entered into during an open trading window in accordance with the Company’s policies on insider trading and was intended to satisfy Rule 10b5-1(c).

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Name George Kemble
Title Chairman of the Board
Rule 10b5-1 Arrangement Adopted true
Adoption Date August 21, 2025
Expiration Date the earlier of (i) July 23, 2027; or (ii) the date on which the aggregate 446,569 shares of Series A common stock have been sold under the 10b5-1 trading plan
Aggregate Available 446,569