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Magnite
MGNI

Overview Fund Activity

290 hedge funds and large institutions have $1.51B invested in Magnite in 2025 Q1 according to their latest regulatory filings, with 53 funds opening new positions, 102 increasing their positions, 96 reducing their positions, and 42 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
290
Holders Change
+7
Holders Change %
+2.47%
% of All Funds
3.94%
Holding in Top 10
7
Holding in Top 10 Change
-3
Holding in Top 10 Change %
-30%
% of All Funds
0.1%
New
53
Increased
102
Reduced
96
Closed
42
Calls
$41.6M
Puts
$50.1M
Net Calls
-$8.44M
Net Calls Change
-$4.39M

Top Buyers

1
Fidelity Investments
Fidelity Investments
Massachusetts
+$92.1M
2
Capital Research Global Investors
Capital Research Global Investors
California
+$59.3M
3
American Century Companies
American Century Companies
Missouri
+$30.2M
4
Pacer Advisors
Pacer Advisors
Pennsylvania
+$12.6M
5
EC
Edenbrook Capital
New York
+$10.4M

Top Sellers

1
Wellington Management Group
Wellington Management Group
Massachusetts
-$12.9M
2
Victory Capital Management
Victory Capital Management
Texas
-$12.1M
3
GIM
Granahan Investment Management
Massachusetts
-$11M
4
DCM
Driehaus Capital Management
Illinois
-$10.4M
5
WJWM
Williams Jones Wealth Management
New York
-$9.59M
Name Holding Trade Value Shares
Change 		Shares
Change %
UOC
301
UBS O'Connor
Illinois
– -$796K -50,000 Closed
D.E. Shaw & Co
302
D.E. Shaw & Co
New York
– -$719K -45,187 Closed
Los Angeles Capital Management
303
Los Angeles Capital Management
California
– -$651K -40,902 Closed
Walleye Capital
304
Walleye Capital
New York
– -$606K -38,070 Closed
MFG
305
Merit Financial Group
Georgia
– -$586K -36,823 Closed
AC
306
Avenir Corporation
Virginia
– -$557K -35,000 Closed
Simplex Trading
307
Simplex Trading
Illinois
– -$509K -31,987 Closed
BFM
308
Boothbay Fund Management
New York
– -$478K -30,000 Closed
MCP
309
Militia Capital Partners
Nevada
– -$398K -25,000 Closed
BBA
310
Baader Bank Aktiengesellschaft
Germany
– -$318K -20,000 Closed
BCM
311
Bayesian Capital Management
New York
– -$260K -16,320 Closed
OQS
312
Occudo Quantitative Strategies
Florida
– -$251K -15,770 Closed
GCP
313
GSA Capital Partners
United Kingdom
– -$228K -14,341 Closed
BC
314
Bridgefront Capital
Texas
– -$192K -12,091 Closed
CIC
315
Cornercap Investment Counsel
Georgia
– -$192K -12,050 Closed
OSAM
316
O'Shaughnessy Asset Management
Connecticut
– -$178K -11,153 Closed
VI
317
Versor Investments
New York
– -$174K -10,900 Closed
Prudential Financial
318
Prudential Financial
New Jersey
– -$172K -10,857 Closed
PAM
319
Panagora Asset Management
Massachusetts
– -$164K -10,322 Closed
QT
320
Quantbot Technologies
New York
– -$86.8K -5,450 Closed
AIC
321
Archer Investment Corporation
Indiana
– -$15.9K -1,000 Closed
GP
322
Greenline Partners
New York
– -$14.3K -900 Closed
HI
323
Harbour Investments
Wisconsin
– -$9.07K -570 Closed
GM
324
GeoWealth Management
Illinois
– -$8.3K -521 Closed
CFGS
325
Concourse Financial Group Securities
Alabama
– -$6.34K -386 Closed
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