Institutional shares held 133 Million
4.54M calls
3.74M puts
Total value of holdings $2.96B
$101M calls
$83.2M puts
Market Cap $2.96B
132,937,000 Shares Out.
Institutional ownership 100.08%
# of Institutions 341


Latest Institutional Activity in MGNI

Top Purchases

Q2 2025
Schonfeld Strategic Advisors LLC Shares Held: 1.9M ($42.3M)
Q2 2025
American Century Companies Inc Shares Held: 4.83M ($107M)
Q2 2025
Frontier Capital Management CO LLC Shares Held: 1.79M ($39.9M)
Q2 2025
Apis Capital Advisors, LLC Shares Held: 1.05M ($23.3M)
Q2 2025
Granahan Investment Management, LLC Shares Held: 3.64M ($81.1M)

Top Sells

Q2 2025
Nordea Investment Management Ab Shares Held: 331K ($7.37M)
Q2 2025
Ameriprise Financial Inc Shares Held: 106K ($2.37M)
Q2 2025
Bank Of America Corp Shares Held: 413K ($9.2M)
Q2 2025
Wellington Management Group LLP Shares Held: 5.45M ($121M)
Q2 2025
Edenbrook Capital, LLC Shares Held: 3.61M ($80.4M)

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
View All Transactions

Last 12 Months Summary

Buy / Acquisition
1.13M Shares
From 20 Insiders
Grant, award, or other acquisition 774K shares
Exercise of conversion of derivative security 354K shares
Sell / Disposition
2.17M Shares
From 21 Insiders
Payment of exercise price or tax liability 363K shares
Open market or private sale 1.8M shares

Track Institutional and Insider Activities on MGNI

Follow MAGNITE, INC. and customize your updates to receive the information that matters most to you.

Institutional Portfolio Updates

Receive a notification when an Institution or Guru buys or sells MGNI shares.

Notify only if

Insider Trading

Get notified when an Magnite, Inc. insider buys or sells MGNI shares.

Notify only if

News

Receive news related to MAGNITE, INC.

Track Activities on MGNI