Day David 4

What Happened

• David Day, Chief Financial Officer of MAGNITE, reported a disposition on 2026-05-15 in which 14,170 shares were withheld (disposed) at $12.82 per share, for a total value of approximately $181,659. This was a non‑discretionary share forfeiture to satisfy tax withholding on vested restricted stock units (RSUs), not an open‑market sale or purchase.

Key Details

• Transaction date and price: May 15, 2026 — 14,170 shares withheld at $12.82/share (total ≈ $181,659).
• Shares owned after transaction: Not specified in the provided filing.
• Footnote: The filing notes the forfeiture was non‑discretionary and required by the issuer to cover tax withholding on RSU vesting.
• Filing timeliness: Report filed 2026-05-19 (timely within the two business‑day Form 4 window for a 2026-05-15 transaction).

Context

• This is a routine tax‑withholding event related to vesting RSUs. Such withholdings are administrative and do not necessarily indicate the insider’s market view. Code "F" denotes tax withholding/forfeiture rather than a voluntary sale.