MAGNITE (MGNI) Director Paul Caine Sells 7,500 Shares

What Happened
Paul Caine, a director of MAGNITE, INC. (MGNI), sold 7,500 shares of MAGNITE common stock in an open-market transaction at $25.00 per share, for a total of $187,500. The filing indicates the sale was effected pursuant to a previously adopted Rule 10b5-1 trading plan.

Key Details

• Transaction date: August 14, 2026
• Sale details: 7,500 shares sold at $25.00 per share — proceeds $187,500
• Shares owned after transaction: Not specified in the information provided in this summary filing
• Footnote: Transaction was effected under a Rule 10b5-1 trading plan adopted by Mr. Caine on August 20, 2025
• Filing date: August 18, 2026 — appears timely (filed within the Form 4 two-business-day requirement)

Context
Sales under a 10b5-1 plan are prearranged and commonly used to execute routine disposals; they do not, by themselves, indicate a change in the insider’s view of the company. This was a straight open-market sale (code S), not an option exercise, award, or gift.