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CIK 0001595974 · Large accelerated filer

MAGNITE, INC.

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Ticker
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
$2,666,560
in 6 filings, $25K under 10b5-1 plans

Net −$2,666,560. 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.

Pace of trading Bought Sold

Who's trading

90 days

  1. Rossman James −$1.4M Director sold 46% of stake
  2. Evans Katie Seitz −$758K See Remarks sold 6% of stake
  3. Saltz Aaron −$276K CHIEF LEGAL OFFICER sold 4% of stake
  4. Gephart Brian −$106K CHIEF FINANCIAL OFFICER sold 2% of stake
  5. Sullivan Haas −$72K CHIEF ACCOUNTING OFFICER sold 2% of stake

Reading 100 more Form 4s from the SEC; this list fills in as they're read.

Date Insider Transaction Shares Price Value Owned after
2026-11-11 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

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