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PubMatic
PUBM

Overview Fund Activity

156 hedge funds and large institutions have $238M invested in PubMatic in 2025 Q1 according to their latest regulatory filings, with 37 funds opening new positions, 40 increasing their positions, 53 reducing their positions, and 39 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
156
Holders Change
-4
Holders Change %
-2.5%
% of All Funds
2.12%
Holding in Top 10
1
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
0.01%
New
37
Increased
40
Reduced
53
Closed
39
Calls
$3.74M
Puts
$1.94M
Net Calls
+$1.8M
Net Calls Change
+$5.41M

Top Buyers

1
GHC
Graham Holdings Company
Virginia
+$4.57M
2
D.E. Shaw & Co
D.E. Shaw & Co
New York
+$3.68M
3
Acadian Asset Management
Acadian Asset Management
Massachusetts
+$3.46M
4
Pacer Advisors
Pacer Advisors
Pennsylvania
+$2.46M
5
Wellington Management Group
Wellington Management Group
Massachusetts
+$1.64M

Top Sellers

1
Vanguard Group
Vanguard Group
Pennsylvania
-$7.56M
2
State of Wisconsin Investment Board
State of Wisconsin Investment Board
Wisconsin
-$2.55M
3
HIM
Hillsdale Investment Management
Ontario, Canada
-$2.49M
4
Millennium Management
Millennium Management
New York
-$2.18M
5
EAM
EFG Asset Management
Oregon
-$1.96M
Name Holding Trade Value Shares
Change 		Shares
Change %
BlackRock
1
BlackRock
New York
$31.6M -$410K -44,893 -1%
Vanguard Group
2
Vanguard Group
Pennsylvania
$31.2M -$7.56M -826,686 -19%
GHC
3
Graham Holdings Company
Virginia
$25.9M +$4.57M +500,000 +21%
Dimensional Fund Advisors
4
Dimensional Fund Advisors
Texas
$13.9M -$101K -11,061 -0.7%
Renaissance Technologies
5
Renaissance Technologies
New York
$10M +$302K +33,000 +3%
Wellington Management Group
6
Wellington Management Group
Massachusetts
$9.85M +$1.64M +179,951 +20%
Geode Capital Management
7
Geode Capital Management
Massachusetts
$8.56M -$112K -12,216 -1%
State Street
8
State Street
Massachusetts
$8.51M -$109K -11,942 -1%
Royal Bank of Canada
9
Royal Bank of Canada
Ontario, Canada
$8.26M -$1.52M -165,800 -16%
Jacobs Levy Equity Management
10
Jacobs Levy Equity Management
New Jersey
$6.05M -$190K -20,766 -3%
NC
11
Nixon Capital
Texas
$5.75M +$462K +50,494 +9%
Acadian Asset Management
12
Acadian Asset Management
Massachusetts
$4.17M +$3.46M +378,714 +484%
D.E. Shaw & Co
13
D.E. Shaw & Co
New York
$4.13M +$3.68M +402,284 +811%
NL
14
Nuveen LLC
North Carolina
$3.96M +$3.96M +433,575 New
JPMorgan Chase & Co
15
JPMorgan Chase & Co
New York
$3.67M +$1.6M +174,671 +77%
Northern Trust
16
Northern Trust
Illinois
$3.28M -$218K -23,838 -6%
Morgan Stanley
17
Morgan Stanley
New York
$3.28M -$548K -59,952 -14%
Nordea Investment Management
18
Nordea Investment Management
Sweden
$3.11M +$20.3K +2,240 +0.7%
Charles Schwab
19
Charles Schwab
California
$2.99M -$528K -57,718 -15%
AC
20
Avestar Capital
New York
$2.92M – – –
TI
21
Trexquant Investment
Connecticut
$2.74M +$1.6M +175,017 +141%
Goldman Sachs
22
Goldman Sachs
New York
$2.61M -$1.03M -112,922 -28%
Pacer Advisors
23
Pacer Advisors
Pennsylvania
$2.46M +$2.46M +268,637 New
Qube Research & Technologies (QRT)
24
Qube Research & Technologies (QRT)
United Kingdom
$2.44M -$1.44M -157,231 -37%
PAM
25
Panagora Asset Management
Massachusetts
$2.35M +$275K +30,043 +13%
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