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 |
|---|---|---|---|---|---|---|
| 2026-01-01 | Day David CHIEF FINANCIAL OFFICER | Grant or award · Performance Stock Units | +44,231 | 44,231 | ||
| 2026-01-01 | BARRETT MICHAEL G. CEO | Grant or award | +94,044 | 331,703 | ||
| 2026-01-01 | BARRETT MICHAEL G. CEO | Grant or award · Performance Stock Units | +122,864 | 122,864 | ||
| 2026-01-01 | BARRETT MICHAEL G. CEO | Grant or award · Stock Option (Right to Buy) | +90,909 | 90,909 | ||
| 2025-12-17 | Soroca Adam Lee CHIEF PRODUCT OFFICER | Option exercise 10b5-1 | +16,656 | $4.92 | $82K | 342,770 |
| 2025-12-17 | Soroca Adam Lee CHIEF PRODUCT OFFICER | Sale 10b5-1 | −16,656 | $17.00 | $283K | 326,114 |
| 2025-12-17 | Soroca Adam Lee CHIEF PRODUCT OFFICER | Option exercise · Employee Stock Option (Right to Buy) 10b5-1 | −16,656 | 80,001 | ||
| 2025-11-24 | Buckley Sean Patrick President, Revenue | Sale 10b5-1 | −2,213 | $14.50 | $32K | 268,912 |
| 2025-11-21 | Spillane Robert F Director | Sale | −12,500 | $14.22 | $178K | 53,917 |
| 2025-11-18 | Buckley Sean Patrick President, Revenue | Sale 10b5-1 | −4,426 | $13.36 | $59K | 271,125 |
| 2025-11-18 | Soroca Adam Lee CHIEF PRODUCT OFFICER | Sale 10b5-1 | −10,857 | $13.23 | $144K | 326,114 |
| 2025-11-15 | Buonasera David CHIEF TECHNOLOGY OFFICER | Shares withheld for taxes | −7,129 | $14.15 | $101K | 231,824 |
| 2025-11-15 | Buckley Sean Patrick President, Revenue | Shares withheld for taxes 10b5-1 | −11,642 | $14.15 | $165K | 275,551 |
| 2025-11-15 | Saltz Aaron CHIEF LEGAL OFFICER | Shares withheld for taxes | −5,695 | $14.15 | $81K | 209,384 |
| 2025-11-15 | Gephart Brian CHIEF ACCOUNTING OFFICER | Shares withheld for taxes | −3,549 | $14.15 | $50K | 89,349 |
| 2025-11-15 | Soroca Adam Lee CHIEF PRODUCT OFFICER | Shares withheld for taxes 10b5-1 | −9,422 | $14.15 | $133K | 336,971 |
| 2025-11-15 | Evans Katie Seitz President, Operations | Shares withheld for taxes | −10,354 | $14.15 | $147K | 383,735 |
| 2025-11-15 | Day David CHIEF FINANCIAL OFFICER | Shares withheld for taxes | −13,197 | $14.15 | $187K | 368,909 |
| 2025-11-15 | BARRETT MICHAEL G. CEO | Shares withheld for taxes | −12,198 | $14.15 | $173K | 237,659 |
| 2025-10-24 | Caine Paul Director | Sale 10b5-1 | −5,000 | $20.00 | $100K | 153,603 |
Page 8 of 9 · 168 trades