StockCIK 1595974
MAGNITE, INC. (MGNI): Insider Trades and Fund Holdings
In the past 12 months, MAGNITE, INC. insiders reported 0 open-market purchases worth $0 and 17 sales worth $5.95M; 16 of the sales were reported as made under a 10b5-1 trading plan.
0Insider buys, 12 months
$0Bought by insiders, 12 months
$5.95MSold by insiders, 12 months
0Tracked funds holding
Timeline: news and trades
Company filings (8-K), insider trades, notices of planned sales (Form 144) and fund moves in the past year, newest first.
- Oct 12, 2026Insider saleDirector Paul Caine sold $316,125 under a 10b5-1 plan (5 days after: signed a material agreement)
- Oct 7, 2026NewsCompany reported: Signed a material agreement
- Sep 21, 2026NewsCompany reported: Executive or director change
- Sep 17, 2026Insider saleDirector Douglas S. Knopper sold $981,216 under a 10b5-1 plan
- Sep 17, 2026Insider saleDirector Paul Caine sold $198,750 under a 10b5-1 plan
- Sep 17, 2026Planned saleDouglas S. Knopper & Abigail L. Knopper TTEES of the Knopper Joint Mgmt Trust 11/15/13 (director) filed notice to sell about $887,874 around Sep 17, 2026
- Sep 17, 2026Planned salePAUL CAINE (director) filed notice to sell about $475,600 around Sep 17, 2026
- Sep 14, 2026Insider saleDirector Robert F. Spillane sold $246,225
- Sep 14, 2026Insider saleCTO David Buonasera sold $27,960 under a 10b5-1 plan
- Sep 14, 2026Planned saleROBERT SPILLANE (director) filed notice to sell about $246,241 around Sep 14, 2026
- Sep 14, 2026Planned saleDAVID BUONASERA (officer) filed notice to sell about $27,692 around Sep 14, 2026
- Sep 11, 2026Insider saleSee Remarks Katie Seitz Evans sold $335,928 under a 10b5-1 plan
- Sep 11, 2026Planned saleKATHERYN EVANS (officer) filed notice to sell about $335,928 around Sep 11, 2026
- Sep 10, 2026Insider saleGeneral Counsel Aaron Saltz sold $936,400 under a 10b5-1 plan
- Sep 10, 2026Insider saleDirector Paul Caine sold $117,650 under a 10b5-1 plan
- Sep 10, 2026Planned saleAARON SALTZ (officer) filed notice to sell about $1.4 million around Sep 10, 2026
- Sep 10, 2026Planned salePAUL CAINE (director) filed notice to sell about $235,800 around Sep 10, 2026
- Sep 9, 2026Insider saleSee Remarks Katie Seitz Evans sold $260,406 under a 10b5-1 plan
- Sep 9, 2026Planned saleKATHERYN EVANS (officer) filed notice to sell about $260,357 around Sep 9, 2026
- Sep 8, 2026Insider saleSee Remarks Katie Seitz Evans sold $762,895 under a 10b5-1 plan
- Sep 8, 2026Planned saleKATHERYN EVANS (officer) filed notice to sell about $762,871 around Sep 8, 2026
- Sep 2, 2026Insider saleCTO David Buonasera sold $26,075 under a 10b5-1 plan
- Sep 2, 2026Planned saleDAVID BUONASERA (officer) filed notice to sell about $26,075 around Sep 2, 2026
- Sep 1, 2026Insider saleCTO David Buonasera sold $125,789 under a 10b5-1 plan
- Sep 1, 2026Planned saleDAVID BUONASERA (officer) filed notice to sell about $125,789 around Sep 1, 2026
- Aug 28, 2026Insider saleDirector Sarah Patricia Harden sold $442,464 under a 10b5-1 plan
- Aug 28, 2026Planned saleSARAH PATRICIA HARDEN (director) filed notice to sell about $442,464 around Aug 28, 2026
- Aug 26, 2026Insider saleDirector Sarah Patricia Harden sold $712,121 under a 10b5-1 plan
- Aug 26, 2026Planned saleSARAH PATRICIA HARDEN (director) filed notice to sell about $712,167 around Aug 26, 2026
- Aug 18, 2026Insider saleSee Remarks Sean Patrick Buckley sold $68,975 under a 10b5-1 plan
- Aug 18, 2026Planned saleSEAN BUCKLEY (officer) filed notice to sell about $66,740 around Aug 18, 2026
- Aug 17, 2026Insider saleSee Remarks Sean Patrick Buckley sold $201,068 under a 10b5-1 plan
- Aug 17, 2026Planned saleSEAN BUCKLEY (officer) filed notice to sell about $204,542 around Aug 17, 2026
- Aug 14, 2026Insider saleDirector Paul Caine sold $187,500 under a 10b5-1 plan
Recent insider trades
Open-market purchases (code P) and sales (code S) from Form 4. Grants, option exercises and gifts are not shown. Latest filing: Oct 14, 2026.
| Filed | Insider | Type | Value |
|---|---|---|---|
| Oct 14 | Paul CaineDirector | ▼ SELL10b5-1 | $316K |
| Sep 18 | Douglas S. KnopperDirector | ▼ SELL10b5-1 | $981K |
| Sep 18 | Paul CaineDirector | ▼ SELL10b5-1 | $199K |
| Sep 16 | Robert F. SpillaneDirector | ▼ SELL | $246K |
| Sep 16 | David BuonaseraCTO | ▼ SELL10b5-1 | $28K |
| Sep 11 | Aaron SaltzGeneral Counsel | ▼ SELL10b5-1 | $936K |
| Sep 11 | Katie Seitz EvansSee Remarks | ▼ SELL10b5-1 | $336K |
| Sep 11 | Paul CaineDirector | ▼ SELL10b5-1 | $118K |
| Sep 10 | Katie Seitz EvansSee Remarks | ▼ SELL10b5-1 | $763K |
| Sep 10 | Katie Seitz EvansSee Remarks | ▼ SELL10b5-1 | $260K |
Source: SEC Form 4 filings, retrieved Oct 28, 2026. How we read filings
All 17 MGNI insider trades →Insiders who traded in the past year
| Insider | Role | Buys | Bought | Sells | Sold |
|---|---|---|---|---|---|
| Paul Caine | Director | 0 | $0 | 4 | $820K |
| Douglas S. Knopper | Director | 0 | $0 | 1 | $981K |
| Robert F. Spillane | Director | 0 | $0 | 1 | $246K |
| David Buonasera | CTO | 0 | $0 | 3 | $180K |
| Aaron Saltz | General Counsel | 0 | $0 | 1 | $936K |
| Katie Seitz Evans | See Remarks | 0 | $0 | 3 | $1.36M |
| Sarah Patricia Harden | Director | 0 | $0 | 2 | $1.15M |
| Sean Patrick Buckley | See Remarks | 0 | $0 | 2 | $270K |
Buybacks and executive pay
MAGNITE, INC. spent $46.3 million buying back its own shares in 2025.
| Year | CEO pay reported | CEO pay "actually paid" | Value of $100 invested |
|---|---|---|---|
| 2025 | $5.84M | $6.13M | n/a |
| 2024 | $5.25M | $13.0M | n/a |
| 2023 | $5.64M | $2.46M | n/a |
From the company's XBRL data filed with the SEC. "Actually paid" is the SEC's pay-versus-performance measure, which counts changes in the value of stock awards. "Value of $100 invested" is the company's cumulative shareholder return as reported, usually measured from five years earlier. See all buybacks and CEO pay across companies.
Reading these numbers
Insiders sell for many reasons: taxes, diversification, a house. Purchases with their own money are rarer and are usually read as more informative. A Form 4 is due within two business days of the trade. How to read a Form 4 →