Magnite, Inc. MGNI
We take great care to ensure that the data presented and summarized in this overview for MAGNITE, INC. is accurate and up-to-date, based on a comprehensive analysis of 13F filing forms for institutional ownership and form 4 filings for insider transactions. Please note that this data may differ from other sources and should not be relied upon as the sole basis for investment decisions.
Top Institutions Holding MGNI
View all-
Vanguard Group Inc Valley Forge, PA13.6MShares$324 Million0.01% of portfolio
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Capital Research Global Investors Los Angeles, CA12.9MShares$308 Million0.07% of portfolio
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Black Rock Inc. New York, NY9.7MShares$232 Million0.0% of portfolio
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Boston Partners Boston, MA5.57MShares$133 Million0.16% of portfolio
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Wellington Management Group LLP Boston, MA5.45MShares$130 Million0.02% of portfolio
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Dimensional Fund Advisors LP Austin, TX4.9MShares$117 Million0.03% of portfolio
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American Century Companies Inc Kansas City, MO4.83MShares$115 Million0.07% of portfolio
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Nuveen Asset Management, LLC Chicago, IL3.94MShares$94.1 Million0.02% of portfolio
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Granahan Investment Management, LLC Waltham, MA3.64MShares$87 Million4.19% of portfolio
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Edenbrook Capital, LLC Mount Kisco, NY3.61MShares$86.2 Million18.86% of portfolio
Latest Institutional Activity in MGNI
Top Purchases
Top Sells
About MGNI
Magnite, Inc. operates an independent sell-side advertising platform in the United States and internationally. The company's platform offers applications and services for sellers of digital advertising inventory or publishers that own and operate CTV channels, applications, websites, and other digital media properties, to manage and monetize their inventory; and provides applications and services for buyers, including advertisers, agencies, agency trading desks, and demand side platforms to buy digital advertising inventory. It markets its technology solutions to buyers and sellers through a sales teams that operate from various locations. The company was formerly known as The Rubicon Project, Inc. and changed name to Magnite, Inc. in July 2020. Magnite, Inc. was incorporated in 2007 and is headquartered in New York, New York.
Insider Transactions at MGNI
Insider Transaction List
View all| Date | Insider | Transaction | Ownership Type | Shares Traded | Value / Price |
|---|---|---|---|---|---|
|
Sep 10
2025
|
Paul Caine |
SELL
Open market or private sale
|
Direct |
5,000
-1.47%
|
$115,000
$23.71 P/Share
|
|
Sep 09
2025
|
Sean Patrick Buckley President, Revenue |
SELL
Open market or private sale
|
Direct |
20,000
-6.51%
|
$480,000
$24.61 P/Share
|
|
Sep 08
2025
|
Sean Patrick Buckley President, Revenue |
SELL
Open market or private sale
|
Direct |
20,000
-6.11%
|
$500,000
$25.56 P/Share
|
|
Sep 04
2025
|
Brian Gephart CHIEF ACCOUNTING OFFICER |
SELL
Open market or private sale
|
Direct |
27,671
-22.95%
|
$664,104
$24.71 P/Share
|
|
Sep 03
2025
|
David Buonasera CHIEF TECHNOLOGY OFFICER |
SELL
Open market or private sale
|
Direct |
2,950
-1.22%
|
$73,750
$25.37 P/Share
|
|
Sep 02
2025
|
Adam Lee Soroca CHIEF PRODUCT OFFICER |
SELL
Open market or private sale
|
Direct |
24,986
-3.42%
|
$599,664
$24.59 P/Share
|
|
Sep 02
2025
|
Adam Lee Soroca CHIEF PRODUCT OFFICER |
BUY
Exercise of conversion of derivative security
|
Direct |
24,986
+6.3%
|
$99,944
$4.92 P/Share
|
|
Aug 29
2025
|
Aaron Saltz CHIEF LEGAL OFFICER |
SELL
Open market or private sale
|
Direct |
12,403
-5.12%
|
$322,478
$26.07 P/Share
|
|
Aug 27
2025
|
Katie Seitz Evans President, Operations |
SELL
Open market or private sale
|
Direct |
21,509
-5.18%
|
$537,725
$25.52 P/Share
|
|
Aug 26
2025
|
Diane Yu |
SELL
Open market or private sale
|
Direct |
20,000
-22.86%
|
$500,000
$25.23 P/Share
|
|
Aug 25
2025
|
Katie Seitz Evans President, Operations |
SELL
Open market or private sale
|
Direct |
8,345
-1.97%
|
$216,970
$26.0 P/Share
|
|
Aug 25
2025
|
Paul Caine |
SELL
Open market or private sale
|
Direct |
7,500
-4.2%
|
$187,500
$25.0 P/Share
|
|
Aug 19
2025
|
Sean Patrick Buckley President, Revenue |
SELL
Open market or private sale
|
Direct |
9,315
-2.77%
|
$214,245
$23.42 P/Share
|
|
Aug 19
2025
|
Adam Lee Soroca CHIEF PRODUCT OFFICER |
SELL
Open market or private sale
|
Direct |
10,579
-2.96%
|
$243,317
$23.47 P/Share
|
|
Aug 18
2025
|
David Buonasera CHIEF TECHNOLOGY OFFICER |
SELL
Open market or private sale
|
Direct |
7,834
-3.14%
|
$180,182
$23.85 P/Share
|
|
Aug 18
2025
|
Sean Patrick Buckley President, Revenue |
SELL
Open market or private sale
|
Direct |
10,886
-3.13%
|
$250,378
$23.85 P/Share
|
|
Aug 18
2025
|
Michael G. Barrett CEO |
SELL
Open market or private sale
|
Direct |
35,951
-12.58%
|
$826,873
$23.85 P/Share
|
|
Aug 18
2025
|
Aaron Saltz CHIEF LEGAL OFFICER |
SELL
Open market or private sale
|
Direct |
5,770
-2.33%
|
$132,710
$23.85 P/Share
|
|
Aug 18
2025
|
Katie Seitz Evans President, Operations |
SELL
Open market or private sale
|
Direct |
10,487
-2.41%
|
$241,201
$23.85 P/Share
|
|
Aug 18
2025
|
Adam Lee Soroca CHIEF PRODUCT OFFICER |
SELL
Open market or private sale
|
Direct |
9,700
-2.65%
|
$223,100
$23.85 P/Share
|
Last 12 Months Summary
| Grant, award, or other acquisition | 774K shares |
|---|---|
| Exercise of conversion of derivative security | 379K shares |
| Payment of exercise price or tax liability | 358K shares |
|---|---|
| Open market or private sale | 2.08M shares |
| Bona fide gift | 26.4K shares |