PEARSON DAVID T. 4

What Happened David T. Pearson, a director of Magnite, Inc. (MGNI), disposed of 10,766 shares in an open-market sale on June 10, 2026 for a weighted-average price of $15.65, yielding approximately $168,488. Two days earlier (June 8, 2026) he was granted 13,798 restricted stock units (RSUs) as compensation (acquired at $0.00). Sales are often routine; the sale here was executed under a pre-established trading plan.

Key Details

• Transactions: June 8, 2026 — 13,798 RSUs granted (price $0.00); June 10, 2026 — 10,766 shares sold in the open market (weighted avg $15.65) for ~$168,488.
• Sale price range: shares sold across prices from $15.285 to $15.88 (weighted avg reported).
• Shares owned after transaction: not disclosed in the provided Form 4.
• Notable footnotes: RSUs vest in full on the earliest of (i) June 8, 2027, (ii) the 2027 annual meeting, or (iii) a change of control; RSUs were granted as compensation; the sale was made under a Rule 10b5-1 trading plan adopted March 9, 2026.
• Timeliness: Filing dated June 10, 2026 — appears timely (Form 4 is generally due within two business days of the transaction).

Context RSUs are compensation grants and only convert to shares when they vest per the stated schedule; they do not represent an immediate cash sale. The sale was executed under a 10b5-1 plan, which is a pre-set trading arrangement that can indicate routine disposition rather than a spontaneous market-timing decision.