| $2B | ||
| $351M | ||
| $24M | ||
| $16M | ||
| $13M | ||
| $9M |
Buys | $0 | 0 | 0 |
Sells | $35,398,819 | 69 | 100 |
| Caine Paul | director | 0 | $0 | 2 | $201,750 | $-201,750 |
| PEARSON DAVID T. | director | 0 | $0 | 1 | $202,611 | $-202,611 |
| Spillane Robert F | director | 0 | $0 | 2 | $465,050 | $-465,050 |
| Gephart Brian | CHIEF ACCOUNTING OFFICER | 0 | $0 | 5 | $510,821 | $-510,821 |
| Buonasera David | CHIEF TECHNOLOGY OFFICER | 0 | $0 | 9 | $929,753 | $-929,753 |
| Saltz Aaron | CHIEF LEGAL OFFICER | 0 | $0 | 6 | $1.47M | $-1.47M |
| Buckley Sean Patrick | CHIEF REVENUE OFFICER | 0 | $0 | 9 | $1.62M | $-1.62M |
| Evans Katie Seitz | CHIEF OPERATING OFFICER | 0 | $0 | 5 | $2M | $-2M |
| Soroca Adam Lee | CHIEF PRODUCT OFFICER | 0 | $0 | 9 | $3.03M | $-3.03M |
| Day David | CHIEF FINANCIAL OFFICER | 0 | $0 | 10 | $4.6M | $-4.6M |
| Rossman James | director | 0 | $0 | 2 | $5.49M | $-5.49M |
| BARRETT MICHAEL G. | CEO | 0 | $0 | 9 | $14.88M | $-14.88M |
Magnite, Inc. operates an independent sell-side advertising platform in the United States and internationally. The company's platform offers applications and services for sellers of digital advertising inventory or publishers that own and operate CTV channels, applications, websites, and other digital media properties, to manage and monetize their inventory; and provides applications and services for buyers, including advertisers, agencies, agency trading desks, and demand side platforms to buy digital advertising inventory. It markets its technology solutions to buyers and sellers through a sales teams that operate from various locations. The company was formerly known as The Rubicon Project, Inc. and changed name to Magnite, Inc. in July 2020. Magnite, Inc. was incorporated in 2007 and is headquartered in New York, New York.
Over the last 12 months, insiders at Magnite, Inc. have bought $0 and sold $35.4M worth of Magnite, Inc. stock.
On average, over the past 5 years, insiders at Magnite, Inc. have bought $94,900 and sold $19.48M worth of stock each year.
There was no buying activity among insiders over the last 12 months.
The last purchase of 2,500 shares for transaction amount of $22,500 was made by Lam Rachel () on 2022‑05‑11.
| 2025-07-03 | Sale | Soroca Adam Lee | CHIEF PRODUCT OFFICER | 42,584 0.0311% | $25.00 | $1.06M | -3.44% | |
| 2025-06-30 | Sale | Evans Katie Seitz | President, Operations | 24,495 0.0168% | $23.32 | $571,164 | 0.00% | |
| 2025-06-30 | Sale | Day David | CHIEF FINANCIAL OFFICER | 21,682 0.014% | $22.00 | $477,004 | 0.00% | |
| 2025-06-30 | Sale | Saltz Aaron | CHIEF LEGAL OFFICER | 17,574 0.0114% | $22.00 | $386,628 | 0.00% | |
| 2025-06-30 | Sale | Buonasera David | CHIEF TECHNOLOGY OFFICER | 9,289 0.006% | $22.00 | $204,358 | 0.00% | |
| 2025-06-26 | Sale | Day David | CHIEF FINANCIAL OFFICER | 36,000 0.0255% | $20.95 | $754,200 | +15.02% | |
| 2025-06-24 | Sale | Day David | CHIEF FINANCIAL OFFICER | 35,000 0.0247% | $19.95 | $698,250 | +18.75% | |
| 2025-06-24 | Sale | Soroca Adam Lee | CHIEF PRODUCT OFFICER | 44,519 0.0315% | $20.00 | $890,380 | +18.75% | |
| 2025-06-24 | Sale | BARRETT MICHAEL G. | CEO | 300,000 0.2122% | $20.01 | $6M | +18.75% | |
| 2025-06-24 | Sale | Caine Paul | director | 5,000 0.0035% | $20.00 | $100,000 | +18.75% | |
| 2025-06-18 | Sale | BARRETT MICHAEL G. | CEO | 30,000 0.0215% | $19.00 | $570,000 | +25.08% | |
| 2025-06-18 | Sale | Day David | CHIEF FINANCIAL OFFICER | 38,146 0.0272% | $18.95 | $722,867 | +25.08% | |
| 2025-06-18 | Sale | Rossman James | director | 137,007 0.0969% | $18.78 | $2.57M | +25.08% | |
| 2025-06-16 | Sale | BARRETT MICHAEL G. | CEO | 45,000 0.0305% | $17.76 | $799,200 | +20.08% | |
| 2025-06-16 | Sale | Evans Katie Seitz | President, Operations | 20,000 0.0141% | $18.50 | $370,000 | +20.08% | |
| 2025-06-16 | Sale | Saltz Aaron | CHIEF LEGAL OFFICER | 16,788 0.0112% | $17.50 | $293,790 | +20.08% | |
| 2025-06-10 | Sale | Spillane Robert F | director | 15,000 0.0107% | $17.57 | $263,550 | +19.50% | |
| 2025-06-06 | Sale | Soroca Adam Lee | CHIEF PRODUCT OFFICER | 8,328 0.0059% | $17.70 | $147,406 | +15.80% | |
| 2025-06-06 | Sale | PEARSON DAVID T. | director | 11,512 0.0082% | $17.60 | $202,611 | +15.80% | |
| 2025-06-05 | Sale | Evans Katie Seitz | President, Operations | 35,000 0.0247% | $17.36 | $607,600 | +14.83% |
| Evans Katie Seitz | President, Operations | 434430 0.3079% | $10.19M | 0 | 19 | |
| Day David | CHIEF FINANCIAL OFFICER | 421846 0.2989% | $9.89M | 0 | 55 | |
| Soroca Adam Lee | CHIEF PRODUCT OFFICER | 366672 0.2598% | $8.6M | 0 | 34 | |
| BARRETT MICHAEL G. | CEO | 356708 0.2528% | $8.36M | 1 | 28 | +36.15% |
| Buckley Sean Patrick | President, Revenue | 347394 0.2462% | $8.15M | 0 | 15 | |
| Saltz Aaron | CHIEF LEGAL OFFICER | 261814 0.1855% | $6.14M | 0 | 21 | |
| Buonasera David | CHIEF TECHNOLOGY OFFICER | 249413 0.1767% | $5.85M | 0 | 14 | |
| Caine Paul | director | 188603 0.1337% | $4.42M | 0 | 6 | |
| Gephart Brian | CHIEF ACCOUNTING OFFICER | 126575 0.0897% | $2.97M | 0 | 7 | |
| Rossman James | director | 93679 0.0664% | $2.2M | 0 | 3 | |
| PEARSON DAVID T. | director | 75969 0.0538% | $1.78M | 0 | 1 | |
| Spillane Robert F | director | 66417 0.0471% | $1.56M | 0 | 4 | |
| NEWS CORP | 10 percent owner | 4746349 3.3636% | $111.3M | 0 | 1 | |
| ADDANTE FRANK | director | 1134819 0.8042% | $26.61M | 0 | 44 | |
| RAIFMAN GREGORY R | President | 502366 0.356% | $11.78M | 0 | 8 | |
| Kershaw Thomas | Chief Technology Officer | 473763 0.3357% | $11.11M | 0 | 14 | |
| TAPPIN TODD L | CFO & COO | 441327 0.3128% | $10.35M | 0 | 14 | |
| MOHN JARL | director | 355850 0.2522% | $8.34M | 0 | 1 | |
| Prusz Joseph R | Chief Revenue Officer, DV+ | 327296 0.2319% | $7.68M | 0 | 9 | |
| Lam Rachel | 186763 0.1324% | $4.38M | 3 | 1 | <0.0001% | |
| Hughes Shawna | Chief Accounting Officer | 178129 0.1262% | $4.18M | 0 | 2 | |
| Tuller Blima | Chief Accounting Officer | 143055 0.1014% | $3.35M | 0 | 7 | |
| Filip Eve | See remarks | 140408 0.0995% | $3.29M | 0 | 8 | |
| TROE LISA L | director | 114218 0.0809% | $2.68M | 0 | 3 | |
| Knopper Douglas S | director | 105056 0.0744% | $2.46M | 0 | 2 | |
| Patz Harry Jr | Chief Revenue Officer | 100000 0.0709% | $2.35M | 0 | 1 | |
| COPPLE BRIAN W | General Counsel and Secretary | 92200 0.0653% | $2.16M | 0 | 2 | |
| Feldman Jonathan | Co-General Counsel & Secretary | 79771 0.0565% | $1.87M | 0 | 5 | |
| MAYFIELD XII A DELAWARE L P | 10 percent owner | 53815 0.0381% | $1.26M | 0 | 4 |
$72,905,771 | 264 | -1.57% | $90M | |
$65,294,910 | 239 | 39.45% | $149.67M | |
$23,150,383 | 135 | 20.72% | $1.25B | |
$342,414,804 | 97 | -3.65% | $620.89M | |
$101,423,685 | 66 | 28.59% | $1.23B | |
$141,936,875 | 63 | 12.54% | $449.83M | |
$193,728,626 | 61 | 35.99% | $93.98M | |
$251,985,304 | 50 | 16.74% | $438.4M | |
$3,384,132 | 46 | 36.21% | $528.63M | |
$4,607,984 | 46 | 20.25% | $891.87M | |
$4,406,369 | 43 | -11.12% | $9.24B | |
$2,468,149 | 43 | 1.60% | $755.66M | |
$165,123,124 | 40 | 11.58% | $134.9M | |
$20,918,384 | 31 | 17.41% | $6.32B | |
$427,263 | 10 | 1.33% | $14.33B | |
$2,037,867 | 10 | -2.04% | $1.42B | |
$433,806 | 7 | 11.24% | $1.05B | |
Magnite, Inc. (MGNI) | $778,900 | 4 | -4.41% | $3.31B |
$798,729 | 4 | 4.34% | $1.3B |
| Increased Positions | 157 | +47.87% | 29M | +23.22% |
| Decreased Positions | 143 | -43.6% | 16M | -12.68% |
| New Positions | 52 | New | 7M | New |
| Sold Out Positions | 42 | Sold Out | 2M | Sold Out |
| Total Postitions | 342 | +4.27% | 138M | +10.53% |
| Vanguard Group Inc | $164,758.00 | 9.65% | 13.61M | +257,032 | +1.93% | 2024-12-31 |
| Blackrock, Inc. | $118,531.00 | 6.94% | 9.79M | -379,403 | -3.73% | 2025-03-31 |
| Capital Research Global Investors | $93,553.00 | 5.48% | 7.73M | +8M | New | 2024-12-31 |
| Wellington Management Group Llp | $85,133.00 | 4.99% | 7.03M | +450,341 | +6.84% | 2024-12-31 |
| Dimensional Fund Advisors Lp | $66,903.00 | 3.92% | 5.52M | +170,532 | +3.19% | 2024-12-31 |
| Boston Partners | $57,599.00 | 3.37% | 4.76M | +1M | +39.08% | 2024-12-31 |
| Nuveen Asset Management, Llc | $47,747.00 | 2.8% | 3.94M | -173,082 | -4.21% | 2024-12-31 |
| Granahan Investment Management, Llc | $43,754.00 | 2.56% | 3.61M | -387,635 | -9.69% | 2024-12-31 |
| Driehaus Capital Management Llc | $40,187.00 | 2.35% | 3.32M | -98,335 | -2.88% | 2024-12-31 |
| Nine Ten Capital Management Llc | $37,733.00 | 2.21% | 3.12M | +493,983 | +18.84% | 2024-12-31 |