FOUNTAIN THOMAS DEAN 4

What Happened

• Thomas Fountain, EVP Global Services & Strategy at F5 (FFIV), had 2,699 shares issued upon the vesting/conversion of Restricted Stock Units (RSUs) on February 1, 2026. To satisfy tax withholding, 1,402 of those shares were surrendered at an effective price of $275.61 each, totaling about $386,405.
• The filing also shows conversion/settlement entries for three RSU tranches (950, 707 and 1,042 shares) reported at $0 — these reflect the mechanics of converting derivative awards (RSUs) into underlying shares, not open-market sales. Net from this vesting event, Fountain retained 1,297 shares (2,699 issued minus 1,402 withheld).

Key Details

• Transaction date: February 1, 2026; Form 4 filed February 3, 2026 (timely).
• Reported codes: M = exercise/conversion of derivative (RSU vesting); F = payment of tax liability (share withholding).
• Shares issued on vesting: 2,699; shares withheld for taxes: 1,402 at $275.61 each (~$386,405).
• Additional M entries (950, 707, 1,042) total 2,699 and represent conversion/settlement of RSUs (reported at $0).
• Shares owned after transaction: the filing excerpt does not disclose total post-transaction holdings; net increase from this event = +1,297 shares.
• Notable footnotes: Vesting related to prior RSU awards granted Nov 1, 2023; Nov 1, 2024; and Nov 3, 2025. Those awards vest in twelve equal quarterly increments with start dates noted in the filing.

Context

• This was an RSU vesting and tax-withholding event, a routine administrative transaction rather than an open-market buy or sale indicating new investment sentiment. The zero-dollar lines reflect RSU conversion mechanics; the only monetary disposition was the tax withholding of 1,402 shares (code F).