Magnite (MGNI) CTO David Buonasera Sells 8,102 Shares to Cover Taxes

What Happened
David Buonasera, Chief Technology Officer of Magnite, reported a non‑discretionary forfeiture of 8,102 shares on August 15, 2026. The shares were disposed at $24.73 per share for a total of approximately $200,362. This transaction was recorded as payment of tax withholding related to the vesting of restricted stock units (RSUs), not an open‑market sale initiated by the insider.

Key Details

• Transaction date: 2026-08-15
• Filing date / Reported: 2026-08-18 (reporting period: 2026-08-15) — filing appears timely.
• Transaction code: F (payment of exercise price or tax liability / share forfeiture for taxes)
• Shares forfeited/disposed: 8,102 at $24.73 per share; total ≈ $200,362
• Shares owned after transaction: Not specified in the provided filing details
• Footnote: F1 — the forfeiture was non‑discretionary and mandated by the issuer to cover tax withholding on RSU vesting

Context
This is a routine tax‑withholding transaction tied to RSU vesting and does not necessarily reflect the insider’s view of the company’s stock. Purchases or discretionary sales by insiders generally carry more interpretive weight for investors than mandatory withholding transactions like this one.