CIK 0001595974 · Large accelerated filer
MAGNITE, INC.
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- MGNI
- Exchange
- Nasdaq
- Industry
- Services-Computer Programming, Data Processing, Etc.
- FY end
- Dec 31
- Incorporated
- DE
- Entity type
- operating
- EIN
- 208881738
- Phone
- 212-243-2769
- Business address
- 1250 BROADWAY, 9TH FLOOR, NEW YORK, NY
- Former names
- RUBICON PROJECT, INC.
- Open-market buys, last 90 days
- $0
- in 0 filings
- Open-market sales, last 90 days
- $9,462,259
- in 21 filings, $6.0M under 10b5-1 plans
Net −$9,462,259. Shares bought or sold at a price by officers, directors and 10% owners (Form 4 codes P and S). Grants, option exercises and tax withholding aren't counted.
Who's trading
90 days
Reading 100 more Form 4s from the SEC; this list fills in as they're read.
| Date | Insider | Transaction | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|
| 2026-11-12 | Yu Diane Director | Sale | −20,000 | $29.17 | $583K | 61,279 |
| 2026-11-11 | Sullivan Haas CHIEF ACCOUNTING OFFICER | Sale | −2,427 | $29.59 | $72K | 95,127 |
| 2026-11-11 | Rossman James Director | Sale | −49,190 | $29.05 | $1.4M | 58,287 |
| 2026-11-09 | Buonasera David CHIEF TECHNOLOGY OFFICER | Sale 10b5-1 | −871 | $29.00 | $25K | 238,578 |
| 2026-11-09 | Saltz Aaron CHIEF LEGAL OFFICER | Sale | −9,597 | $28.75 | $276K | 214,792 |
| 2026-11-09 | Gephart Brian CHIEF FINANCIAL OFFICER | Sale | −3,700 | $28.78 | $106K | 163,310 |
| 2026-11-09 | Evans Katie Seitz See Remarks | Sale | −26,178 | $28.96 | $758K | 415,622 |
| 2026-11-05 | Buonasera David CHIEF TECHNOLOGY OFFICER | Sale 10b5-1 | −4,272 | $27.00 | $115K | 240,883 |
| 2026-11-05 | Buonasera David CHIEF TECHNOLOGY OFFICER | Sale 10b5-1 | −1,434 | $28.00 | $40K | 239,449 |
| 2026-11-05 | Buckley Sean Patrick See Remarks | Sale 10b5-1 | −10,991 | $27.00 | $297K | 282,069 |
| 2026-10-12 | Caine Paul Director | Sale 10b5-1 | −12,500 | $25.29 | $316K | 124,901 |
| 2026-10-01 | Sullivan Haas CHIEF ACCOUNTING OFFICER | Grant or award | +24,641 | 97,554 | ||
| 2026-10-01 | Gephart Brian CHIEF FINANCIAL OFFICER | Grant or award | +64,682 | 167,010 | ||
| 2026-09-17 | Caine Paul Director | Sale 10b5-1 | −7,500 | $26.50 | $199K | 137,401 |
| 2026-09-17 | Knopper Douglas S Director | Sale 10b5-1 | −37,337 | $26.28 | $981K | 51,136 |
| 2026-09-14 | Buonasera David CHIEF TECHNOLOGY OFFICER | Sale 10b5-1 | −1,165 | $24.00 | $28K | 245,155 |
| 2026-09-14 | Spillane Robert F Director | Option exercise | +10,363 | $5.17 | $54K | 68,078 |
| 2026-09-14 | Spillane Robert F Director | Sale | −10,363 | $23.76 | $246K | 57,715 |
| 2026-09-14 | Spillane Robert F Director | Option exercise · Stock Option (right to buy) | −10,363 | 0 | ||
| 2026-09-11 | Evans Katie Seitz See Remarks | Sale 10b5-1 | −13,997 | $24.00 | $336K | 441,800 |
Page 1 of 9 · 168 trades