Leonhart Michele M. 4

What Happened

• Michele M. Leonhart, a director of 908 Devices Inc. (MASS), had 6,486 restricted stock units (RSUs) converted into 6,486 shares of common stock on June 25, 2026. The filing shows a simultaneous disposition of 6,486 shares at $0.00. No cash proceeds are reported for the disposition.

Key Details

• Transaction date: 2026-06-25.
• Conversion/Acquisition: 6,486 shares (from RSUs); price not applicable for acquisition.
• Disposition: 6,486 shares at $0.00 (reported value $0).
• Shares owned after transaction: not specified in the provided filing excerpt.
• Footnotes: F1 explains each RSU converts to one share when vested; F2 notes RSUs vest in substantially equal annual installments over three years beginning June 25, 2024, subject to continued service; RSUs have no expiration.
• Filing timeliness: not indicated in the provided data.

Context

• This was a derivative conversion (RSUs → common stock), not an open-market buy or sale. The $0.00 disposition often reflects shares surrendered or transferred for tax withholding or net settlement, but the filing excerpt does not state the reason. The RSUs are subject to a multi-year vesting schedule (see F2).