Ambiq Micro Chief Financial Officer Jeffrey Winzeler sold 5,455 shares of common stock on October 2, 2026, generating proceeds of approximately $379,644 through a mandatory sell-to-cover arrangement tied to restricted stock unit vesting.
The transaction, disclosed in a Form 4 filing on October 6, was executed in three tranches at weighted average prices of $69.1083 for 2,343 shares, $69.7722 for 2,828 shares, and $71.8592 for 284 shares. All sales were coded as open-market transactions effected pursuant to the company's policy requiring sell-to-cover to satisfy tax obligations from RSU vesting and settlement.
A Form 144 notice filed the same day as the trades confirmed the proposed sale of 5,455 shares with an aggregate market value of $377,213.25. The notice identified the shares as having been acquired through restricted stock units granted on October 2, 2025, for services rendered, and explicitly labeled the transaction as a sell-to-cover for taxes owed related to recent vesting.
Following the sale, Winzeler directly owns 100,844 shares, a 5.13% reduction from his prior holding. At recent trading levels near $69.60, the remaining stake is valued at approximately $7.0 million. The CFO reported no indirect beneficial ownership in the filing.