16 insiders reported 197 Form 4 transactions for MAGNITE, INC. (MGNI) over the past 18 months (most recent 2026-08-18). Recent activity: Buckley Sean Patrick (See Remarks) Sell 11,715 shares, Buonasera David (CHIEF TECHNOLOGY OFFICER) Sell 8,102 shares, Saltz Aaron (CHIEF LEGAL OFFICER) Sell 5,627 shares, Gephart Brian (CHIEF ACCOUNTING OFFICER) Sell 3,789 shares, Evans Katie Seitz (See Remarks) Sell 11,204 shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-08-18 | Buckley Sean Patrick | See Remarks | Sell | 11,715 | $289,712 |
| 2026-08-18 | Buonasera David | CHIEF TECHNOLOGY OFFICER | Sell | 8,102 | $200,362 |
| 2026-08-18 | Saltz Aaron | CHIEF LEGAL OFFICER | Sell | 5,627 | $139,156 |
| 2026-08-18 | Gephart Brian | CHIEF ACCOUNTING OFFICER | Sell | 3,789 | $93,702 |
| 2026-08-18 | Evans Katie Seitz | See Remarks | Sell | 11,204 | $277,075 |
| 2026-08-18 | Day David | CHIEF FINANCIAL OFFICER | Sell | 14,170 | $350,424 |
| 2026-08-18 | Caine Paul | Director | Sell | 7,500 | $187,500 |
| 2026-08-18 | BARRETT MICHAEL G. | CEO | Sell | 10,404 | $257,291 |
| 2026-08-18 | Buckley Sean Patrick | See Remarks | Sell | 8,271 | $201,068 |
| 2026-08-18 | Buckley Sean Patrick | See Remarks | Sell | 2,759 | $68,975 |
| 2026-08-14 | Day David | CHIEF FINANCIAL OFFICER | Sell | 26,258 | $0 |
| 2026-08-12 | Caine Paul | Director | Sell | 5,000 | $121,750 |
| 2026-08-12 | Lam Rachel | Director | Sell | 10,000 | $241,600 |
| 2026-08-12 | Gephart Brian | CHIEF ACCOUNTING OFFICER | Sell | 12,479 | $307,982 |
| 2026-08-07 | Buckley Sean Patrick | See Remarks | Sell | 19,237 | $442,451 |
| 2026-08-07 | Buonasera David | CHIEF TECHNOLOGY OFFICER | Sell | 4,176 | $95,255 |
| 2026-08-07 | Buckley Sean Patrick | See Remarks | Buy | 28,703 | $398,972 |
| 2026-08-07 | Evans Katie Seitz | See Remarks | Buy | 20,000 | $103,200 |
| 2026-08-07 | Knopper Douglas S | Director | Sell | 37,337 | $848,297 |
| 2026-08-07 | BARRETT MICHAEL G. | CEO | Buy | 293,968 | $1.7M |
| 2026-08-07 | Buonasera David | CHIEF TECHNOLOGY OFFICER | Sell | 2,602 | $62,448 |
| 2026-08-07 | Buckley Sean Patrick | See Remarks | Sell | 47,942 | $1.2M |
| 2026-08-07 | Evans Katie Seitz | See Remarks | Sell | 20,000 | $480,000 |
| 2026-08-07 | BARRETT MICHAEL G. | CEO | Sell | 293,968 | $6.7M |
| 2026-08-07 | Buonasera David | CHIEF TECHNOLOGY OFFICER | Sell | 871 | $21,775 |
Source: SEC Form 4 filings · as of 2026-08-18