Evans Katie Seitz 4

What Happened

• Katie Seitz Evans, President, Operations of MAGNITE, recorded a non‑discretionary forfeiture of 27,428 shares on Feb 15, 2026. The shares were withheld at $11.70 per share to cover tax withholding obligations associated with the vesting of restricted stock units, totaling approximately $320,908. This was a tax‑withholding action (not an open‑market sale).

Key Details

• Transaction date: 2026-02-15; filing date: 2026-02-18 (period of report 2026-02-15).
• Price used for withholding: $11.70 per share.
• Shares forfeited/withheld: 27,428; reported value: $320,908.
• Transaction code: F (tax withholding); footnote confirms non‑discretionary forfeiture to satisfy RSU tax withholding obligations.
• Shares owned after the transaction: not specified in the Form 4 provided.
• No indication in the filing that this was part of a 10b5‑1 plan or an open‑market sale.

Context

• This is a routine "net share settlement" / tax‑withholding event when RSUs vest; the company retains (or cancels) some shares to cover required taxes. Such transactions are administrative and do not necessarily reflect insider sentiment about the company.