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PubMatic
PUBM

149 hedge funds and large institutions have $322M invested in PubMatic in 2025 Q2 according to their latest regulatory filings, with 25 funds opening new positions, 54 increasing their positions, 46 reducing their positions, and 32 closing their positions.

New
Increased
Maintained
Reduced
Closed

58% more call options, than puts

Call options by funds: $6.93M | Put options by funds: $4.37M

35% more capital invested

Capital invested by funds: $238M → $322M (+$83.5M)

17% more repeat investments, than reductions

Existing positions increased: 54 | Existing positions reduced: 46

0% more funds holding in top 10

Funds holding in top 10: 1 → 1 (0)

0.06% less ownership

Funds ownership: 64.68% → 64.62% (-0.06%)

5% less funds holding

Funds holding: 157 → 149 (-8)

22% less first-time investments, than exits

New positions opened: 25 | Existing positions closed: 32

Holders
149
Holders Change
-8
Holders Change %
-5.1%
% of All Funds
1.96%
Holding in Top 10
1
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
0.01%
New
25
Increased
54
Reduced
46
Closed
32
Calls
$6.93M
Puts
$4.37M
Net Calls
+$2.56M
Net Calls Change
+$759K

Top Buyers

Rank Fund Capital Flow
1
Citadel Advisors
Citadel Advisors
Florida
+$3.91M
2
Wellington Management Group
Wellington Management Group
Massachusetts
+$2.69M
3
CP
CenterBook Partners
Connecticut
+$2.33M
4
Jacobs Levy Equity Management
Jacobs Levy Equity Management
New Jersey
+$2.27M
5
Acadian Asset Management
Acadian Asset Management
Massachusetts
+$1.8M

Top Sellers

Rank Fund Capital Flow
1
Vanguard Group
Vanguard Group
Pennsylvania
-$8.46M
2
NC
Nixon Capital
Texas
-$5.75M
3
Qube Research & Technologies (QRT)
Qube Research & Technologies (QRT)
United Kingdom
-$2.47M
4
Pacer Advisors
Pacer Advisors
Pennsylvania
-$2.46M
5
Morgan Stanley
Morgan Stanley
New York
-$2.3M
Name Holding Trade Value Shares
Change 		Change in
Stake
Ameriprise
26
Ameriprise
Minnesota
$2.08M +$1.77M +167,498 New
Two Sigma Investments
27
Two Sigma Investments
New York
$1.94M +$1.64M +156,027 New
AI
28
Acuitas Investments
Washington
$1.82M +$1.54M +146,492 New
Deutsche Bank
29
Deutsche Bank
Germany
$1.78M -$206K -19,515 -12%
Mirae Asset Global ETFs Holdings
30
Mirae Asset Global ETFs Holdings
Hong Kong
$1.76M +$28K +2,654 +2%
Morgan Stanley
31
Morgan Stanley
New York
$1.75M -$2.3M -217,713 -61%
American Century Companies
32
American Century Companies
Missouri
$1.71M -$1.01M -96,047 -41%
Bank of New York Mellon
33
Bank of New York Mellon
New York
$1.65M +$125K +11,876 +10%
PH
34
Pinnacle Holdings
Oklahoma
$1.6M +$159K +15,089 +13%
Barclays
35
Barclays
United Kingdom
$1.52M +$206K +19,521 +19%
UBS AM
36
UBS AM
Illinois
$1.49M +$413K +39,154 +49%
UBS Group
37
UBS Group
Switzerland
$1.48M +$697K +66,081 +125%
AG
38
Algert Global
California
$1.36M +$589K +55,911 +105%
Victory Capital Management
39
Victory Capital Management
Texas
$1.31M +$129K +12,253 +13%
LFS
40
Leibman Financial Services
Nebraska
$1.3M +$437K +41,499 +66%
Bank of America
41
Bank of America
North Carolina
$1.29M +$691K +65,537 +170%
Walleye Capital
42
Walleye Capital
New York
$1.09M +$883K +83,776 +1,991%
Invesco
43
Invesco
Georgia
$1.02M +$78.7K +7,468 +10%
DIS
44
Diversified Investment Strategies
Louisiana
$995K +$843K +80,000 New
ACA
45
Apis Capital Advisors
New York
$964K +$817K +77,500 New
Connor, Clark & Lunn Investment Management (CC&L)
46
Connor, Clark & Lunn Investment Management (CC&L)
British Columbia, Canada
$949K +$391K +37,067 +95%
Swiss National Bank
47
Swiss National Bank
Switzerland
$911K -$28.5K -2,700 -4%
Wells Fargo
48
Wells Fargo
California
$861K +$89.4K +8,479 +14%
RhumbLine Advisers
49
RhumbLine Advisers
Massachusetts
$819K +$61.4K +5,828 +10%
State of Wisconsin Investment Board
50
State of Wisconsin Investment Board
Wisconsin
$773K +$655K +62,165 New
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PUBM Hedge Fund Activity: Q2 2025 in Review

149 of the 7,596 institutional investors tracked by Wall St. Rank reported a position in PubMatic (PUBM) for Q2 2025, worth a combined $322M — up 35% from $238M a quarter earlier.

Sellers outnumbered buyers: 32 funds closed out of PUBM and 25 opened new positions — a net loss of 7 holders — while 46 trimmed existing stakes and 54 added.

The largest buyer was Citadel Advisors, adding an estimated $3.91M. The largest seller was Vanguard Group, cutting an estimated $8.46M.

  • 149 institutional investors held PubMatic (PUBM) as of Q2 2025, down from 157 in Q1 2025.
  • Funds reported $322M of PubMatic stock for Q2 2025, up 35% quarter-over-quarter.
  • 25 funds opened new PubMatic positions in Q2 2025 and 32 closed out, a net change of -7 holders.
  • The largest PubMatic buyer in Q2 2025 was Citadel Advisors, an estimated $3.91M added.
  • The largest PubMatic seller in Q2 2025 was Vanguard Group, an estimated $8.46M sold.

Based on aggregated 13F filings for Q2 2025.