Magnite (MGNI) CTO David Buonasera Forfeits 17,137 Shares

What Happened

• David Buonasera, Chief Technology Officer of Magnite (MGNI), had 17,137 shares forfeited on Feb 15, 2026 to satisfy tax withholding obligations tied to vested restricted stock units. The shares were valued at $11.70 each, totaling $200,503. This is a tax-withholding disposal rather than an open-market sale.

Key Details

• Transaction date and price: Feb 15, 2026 at $11.70 per share
• Shares affected: 17,137 (disposed/forfeited)
• Transaction value: $200,503 (17,137 × $11.70)
• Shares owned after transaction: Not specified in the filing
• Footnote: The forfeiture was non-discretionary and mandated by the issuer to cover tax withholding for RSU vesting (Footnote F1)
• Filing: Report filed Feb 18, 2026 for a Feb 15, 2026 transaction; the filing does not indicate an exception or late-report flag

Context

• This was a routine tax-withholding event (code F), where the company retained shares to cover taxes on vested RSUs — effectively a cashless withholding. Such forfeitures are common and do not necessarily indicate the insider is selling additional shares or signaling a change in sentiment.