SEC Form 4 · accession 0001966857-26-000009
MAGNITE, INC. · MGNI
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
David Buonasera
Officer — CHIEF TECHNOLOGY OFFICER
Period of report
Aug 6, 2026
Accepted (ET)
Aug 7, 2026 · 5:09 pm EDT
Rule 10b5-1 plan
yes — trade under a plan
Issuer CIK
0001595974
Table I — non-derivative securities
| Security | Date | Code | Shares | Price | A/D | Owned after | D/I | Nature of ownership |
|---|---|---|---|---|---|---|---|---|
| Common StockF2 | Aug 6, 2026 | S | 4,176 | $22.81 | D | 264,309 | D | |
| Common Stock | Aug 6, 2026 | S | 2,602 | $24.00 | D | 261,707 | D | |
| Common Stock | Aug 6, 2026 | S | 871 | $25.00 | D | 260,836 | D |
Table II — derivative securities
No Table II lines on this filing.
Explanation of responses
- F1The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 11, 2025.
- F2The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $22.72 to $23.00, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote to this Form 4.