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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
$110M
2
Capital Research Global Investors
Capital Research Global Investors
California
$147M
3
American Century Companies
American Century Companies
Missouri
$33.8M
4
Pacer Advisors
Pacer Advisors
Pennsylvania
$12.6M
5
EC
Edenbrook Capital
New York
$45.8M

Top Sellers

1
Wellington Management Group
Wellington Management Group
Massachusetts
$67.4M
2
Victory Capital Management
Victory Capital Management
Texas
$1.38M
3
GIM
Granahan Investment Management
Massachusetts
$30.2M
4
DCM
Driehaus Capital Management
Illinois
$27.5M
5
WJWM
Williams Jones Wealth Management
New York
$0
Name Holding Trade Value Shares
Change 		Shares
Change %
CIM
176
Contravisory Investment Management
Massachusetts
$193K +$193K +16,932 New
CAM
177
CenterStar Asset Management
Illinois
$192K +$192K +16,800 New
KAS
178
Kestra Advisory Services
Texas
$187K +$187K +16,375 New
BAM
179
Bosun Asset Management
Illinois
$186K -$177K -15,548 -49%
KI
180
Kapitalo Investimentos
Brazil
$182K +$182K +15,975 New
WIC
181
Woodmont Investment Counsel
Tennessee
$175K -$571 -50 -0.3%
Public Employees Retirement Association of Colorado
182
Public Employees Retirement Association of Colorado
Colorado
$171K – – –
PCM
183
Prelude Capital Management
New York
$171K +$171K +14,978 New
JIC
184
Johnson Investment Counsel
Ohio
$170K -$80.5K -7,059 -32%
CAPTRUST Financial Advisors
185
CAPTRUST Financial Advisors
North Carolina
$168K -$40.7K -3,565 -19%
BNP Paribas Financial Markets
186
BNP Paribas Financial Markets
France
$163K -$190K -16,694 -54%
AQR Capital Management
187
AQR Capital Management
Connecticut
$162K -$32.6K -2,853 -17%
Lazard Asset Management
188
Lazard Asset Management
New York
$160K -$6.47K -573 -4%
AIM
189
Aigen Investment Management
New York
$154K +$154K +13,535 New
Marshall Wace
190
Marshall Wace
United Kingdom
$154K -$8.94M -783,526 -98%
WAG
191
Winthrop Advisory Group
Massachusetts
$153K +$2.28K +200 +2%
AIP
192
Ameritas Investment Partners
Nebraska
$150K – – –
HWA
193
HCR Wealth Advisors
California
$148K – – –
SAM
194
Shell Asset Management
Netherlands
$148K +$125K +10,937 +547%
1WM
195
1858 Wealth Management
Ohio
$144K +$144K +12,605 New
PFBT
196
Parkside Financial Bank & Trust
Missouri
$133K +$20.6K +1,804 +18%
BC
197
Blackhill Capital
New Jersey
$133K – – –
DC
198
Diametric Capital
Massachusetts
$128K -$45.3K -3,974 -26%
PFGIA
199
Patriot Financial Group Insurance Agency
Massachusetts
$128K +$128K +11,195 New
GCM
200
Graham Capital Management
Connecticut
$128K -$782K -68,577 -86%
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