Sign in

CIK 0001595974 · Large accelerated filer

MAGNITE, INC.

Sign in to watch
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
$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.

Pace of trading Bought Sold

Who's trading

90 days

  1. Evans Katie Seitz −$2.1M See Remarks sold 17% of stake
  2. Rossman James −$1.4M Director sold 46% of stake
  3. Saltz Aaron −$1.2M CHIEF LEGAL OFFICER sold 19% of stake
  4. Harden Sarah Patricia −$1.2M Director sold 30% of stake
  5. Knopper Douglas S −$981K Director sold 42% 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
2026-06-10 PEARSON DAVID T. Director Sale 10b5-1 −10,766 $15.65 $168K 79,001
2026-06-08 Caine Paul Director Grant or award +13,798 167,401
2026-06-08 Yu Diane Director Grant or award +13,798 81,279
2026-06-08 Spillane Robert F Director Grant or award +13,798 57,715
2026-06-08 Harden Sarah Patricia Director Grant or award +13,798 163,737
2026-06-08 Knopper Douglas S Director Grant or award 10b5-1 +13,798 173,913
2026-06-08 Rossman James Director Grant or award +13,798 107,477
2026-06-08 Lam Rachel Director Grant or award +13,798 240,620
2026-06-08 PEARSON DAVID T. Director Grant or award 10b5-1 +13,798 89,767
2026-06-01 Buonasera David CHIEF TECHNOLOGY OFFICER Sale 10b5-1 −1,409 $15.00 $21K 292,784
2026-05-19 Spillane Robert F Director Sale −10,000 $13.33 $133K 43,917
2026-05-15 Buonasera David CHIEF TECHNOLOGY OFFICER Shares withheld for taxes −8,335 $12.82 $107K 294,193
2026-05-15 Buckley Sean Patrick President, Revenue Shares withheld for taxes −12,019 $12.82 $154K 392,747
2026-05-15 Saltz Aaron CHIEF LEGAL OFFICER Shares withheld for taxes −5,627 $12.82 $72K 270,016
2026-05-15 Gephart Brian CHIEF ACCOUNTING OFFICER Shares withheld for taxes −3,789 $12.82 $49K 118,596
2026-05-15 Evans Katie Seitz President, Operations Shares withheld for taxes −11,204 $12.82 $144K 496,840
2026-05-15 Day David CHIEF FINANCIAL OFFICER Shares withheld for taxes −14,170 $12.82 $182K 493,289
2026-05-15 BARRETT MICHAEL G. CEO Shares withheld for taxes −10,404 $12.82 $133K 403,074
2026-02-18 Soroca Adam Lee CHIEF PRODUCT OFFICER Sale 10b5-1 −21,529 $12.00 $258K 388,425
2026-02-15 Buonasera David CHIEF TECHNOLOGY OFFICER Shares withheld for taxes −17,137 $11.70 $201K 302,095

Page 5 of 9 · 168 trades