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 |
|---|---|---|---|---|---|---|
| 2026-09-10 | Saltz Aaron CHIEF LEGAL OFFICER | Sale 10b5-1 | −40,000 | $23.41 | $936K | 224,389 |
| 2026-09-10 | Caine Paul Director | Sale 10b5-1 | −5,000 | $23.53 | $118K | 144,901 |
| 2026-09-09 | Evans Katie Seitz See Remarks | Sale 10b5-1 | −11,100 | $23.46 | $260K | 455,797 |
| 2026-09-08 | Evans Katie Seitz See Remarks | Option exercise 10b5-1 | +13,546 | $5.16 | $70K | 499,182 |
| 2026-09-08 | Evans Katie Seitz See Remarks | Sale 10b5-1 | −32,285 | $23.63 | $763K | 466,897 |
| 2026-09-08 | Evans Katie Seitz See Remarks | Option exercise · Employee Stock Option (Right to Buy) 10b5-1 | −13,546 | 0 | ||
| 2026-09-02 | Buonasera David CHIEF TECHNOLOGY OFFICER | Sale 10b5-1 | −1,043 | $25.00 | $26K | 246,320 |
| 2026-09-01 | Buonasera David CHIEF TECHNOLOGY OFFICER | Sale 10b5-1 | −5,371 | $23.42 | $126K | 247,363 |
| 2026-08-28 | Harden Sarah Patricia Director | Sale 10b5-1 | −18,436 | $24.00 | $442K | 114,751 |
| 2026-08-26 | Harden Sarah Patricia Director | Sale 10b5-1 | −30,550 | $23.31 | $712K | 133,187 |
| 2026-08-18 | Buckley Sean Patrick See Remarks | Sale 10b5-1 | −2,759 | $25.00 | $69K | 293,060 |
| 2026-08-17 | Buckley Sean Patrick See Remarks | Sale 10b5-1 | −8,271 | $24.31 | $201K | 295,819 |
| 2026-08-15 | Buonasera David CHIEF TECHNOLOGY OFFICER | Shares withheld for taxes | −8,102 | $24.73 | $200K | 252,734 |
| 2026-08-15 | Buckley Sean Patrick See Remarks | Shares withheld for taxes 10b5-1 | −11,715 | $24.73 | $290K | 304,090 |
| 2026-08-15 | Saltz Aaron CHIEF LEGAL OFFICER | Shares withheld for taxes | −5,627 | $24.73 | $139K | 264,389 |
| 2026-08-15 | Gephart Brian CHIEF ACCOUNTING OFFICER | Shares withheld for taxes | −3,789 | $24.73 | $94K | 102,328 |
| 2026-08-15 | Evans Katie Seitz See Remarks | Shares withheld for taxes | −11,204 | $24.73 | $277K | 485,636 |
| 2026-08-15 | Day David CHIEF FINANCIAL OFFICER | Shares withheld for taxes | −14,170 | $24.73 | $350K | 452,861 |
| 2026-08-15 | BARRETT MICHAEL G. CEO | Shares withheld for taxes | −10,404 | $24.73 | $257K | 392,670 |
| 2026-08-14 | Caine Paul Director | Sale 10b5-1 | −7,500 | $25.00 | $188K | 149,901 |
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