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Magnite
MGNI

Overview Fund Activity

284 hedge funds and large institutions have $3.54B invested in Magnite in 2025 Q2 according to their latest regulatory filings, with 54 funds opening new positions, 101 increasing their positions, 95 reducing their positions, and 57 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
284
Holders Change
-6
Holders Change %
-2.07%
% of All Funds
3.81%
Holding in Top 10
16
Holding in Top 10 Change
+9
Holding in Top 10 Change %
+128.57%
% of All Funds
0.21%
New
54
Increased
101
Reduced
95
Closed
57
Calls
$118M
Puts
$100M
Net Calls
+$17.5M
Net Calls Change
+$26M

Top Buyers

1
Fidelity Investments
1
Fidelity Investments
Massachusetts
$415M
2
SSA
2
Schonfeld Strategic Advisors
New York
$45.8M
3
American Century Companies
3
American Century Companies
Missouri
$116M
4
FCM
4
Frontier Capital Management
Massachusetts
$43.3M
5
ACA
5
Apis Capital Advisors
New York
$25.3M

Top Sellers

1
Nordea Investment Management
1
Nordea Investment Management
Sweden
$7.94M
2
Ameriprise
2
Ameriprise
Minnesota
$2.56M
3
Bank of America
3
Bank of America
North Carolina
$9.97M
4
Qube Research & Technologies (QRT)
4
Qube Research & Technologies (QRT)
United Kingdom
$0
5
Wellington Management Group
5
Wellington Management Group
Massachusetts
$131M
Name Holding Trade Value Shares
Change 		Shares
Change %
Ensign Peak Advisors
126
Ensign Peak Advisors
Utah
$1.41M -$24.1K -1,000 -2%
Janus Henderson Group
127
Janus Henderson Group
United Kingdom
$1.41M – – –
Simplex Trading
128
Simplex Trading
Illinois
$1.27M +$1.27M +52,834 New
Calamos Advisors
129
Calamos Advisors
Illinois
$1.27M -$303K -12,565 -19%
RCM
130
Radcliffe Capital Management
Pennsylvania
$1.21M – – –
DFCM
131
Dark Forest Capital Management
Puerto Rico
$1.19M -$3M -124,560 -72%
CPCM
132
Cardinal Point Capital Management
Ontario, Canada
$1.18M -$113K -4,700 -9%
Zurich Cantonal Bank
133
Zurich Cantonal Bank
Switzerland
$1.18M +$118K +4,882 +11%
Royal Bank of Canada
134
Royal Bank of Canada
Ontario, Canada
$1.14M -$2.43M -100,990 -68%
PM
135
Penbrook Management
New York
$1.12M +$478K +28,420 +74%
BFM
136
Boothbay Fund Management
New York
$1.07M +$1.07M +44,349 New
Canada Life
137
Canada Life
Manitoba, Canada
$1.05M +$118K +4,901 +13%
Victory Capital Management
138
Victory Capital Management
Texas
$1.05M -$1.88M -77,933 -64%
SO
139
STRS Ohio
Ohio
$1.02M -$133K -5,500 -12%
ASRS
140
Arizona State Retirement System
Arizona
$1.01M +$32.3K +1,340 +3%
SG Americas Securities
141
SG Americas Securities
New York
$998K +$419K +17,373 +72%
GCA
142
Greenwood Capital Associates
South Carolina
$969K -$628K -26,046 -39%
Cetera Investment Advisers
143
Cetera Investment Advisers
Illinois
$945K +$129K +5,342 +16%
Osaic Holdings
144
Osaic Holdings
Arizona
$932K -$836K -48,171 -47%
State Board of Administration of Florida Retirement System
145
State Board of Administration of Florida Retirement System
Florida
$922K – – –
ECM
146
ExodusPoint Capital Management
New York
$862K +$862K +35,727 New
Allspring Global Investments
147
Allspring Global Investments
North Carolina
$833K -$251K -10,423 -23%
BCM
148
Bayesian Capital Management
New York
$815K +$815K +33,800 New
DC
149
Diametric Capital
Massachusetts
$800K +$529K +21,912 +195%
D.E. Shaw & Co
150
D.E. Shaw & Co
New York
$771K +$771K +31,947 New
4 5
6
7 8