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PubMatic
PUBM

152 hedge funds and large institutions have $245M invested in PubMatic in 2025 Q4 according to their latest regulatory filings, with 30 funds opening new positions, 52 increasing their positions, 52 reducing their positions, and 26 closing their positions.

New
Increased
Maintained
Reduced
Closed

27% more call options, than puts

Call options by funds: $6.78M | Put options by funds: $5.33M

15% more first-time investments, than exits

New positions opened: 30 | Existing positions closed: 26

7% more capital invested

Capital invested by funds: $229M → $245M (+$16.5M)

1% more funds holding

Funds holding: 150 → 152 (+2)

0% more funds holding in top 10

Funds holding in top 10: 1 → 1 (0)

0% more repeat investments, than reductions

Existing positions increased: 52 | Existing positions reduced: 52

1.26% less ownership

Funds ownership: 73.72% → 72.46% (-1.3%)

Holders
152
Holders Change
+2
Holders Change %
+1.33%
% of All Funds
1.85%
Holding in Top 10
1
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
0.01%
New
30
Increased
52
Reduced
52
Closed
26
Calls
$6.78M
Puts
$5.33M
Net Calls
+$1.45M
Net Calls Change
-$1.37M

Top Buyers

Rank Fund Capital Flow
1
Millennium Management
Millennium Management
New York
+$6.09M
2
CP
CenterBook Partners
Connecticut
+$3.47M
3
TI
Trexquant Investment
Connecticut
+$2.18M
4
Acadian Asset Management
Acadian Asset Management
Massachusetts
+$2.08M
5
AG
Algert Global
California
+$1.67M

Top Sellers

Rank Fund Capital Flow
1
AI
Acuitas Investments
Washington
-$2.94M
2
N
Nuveen
North Carolina
-$2.6M
3
Wellington Management Group
Wellington Management Group
Massachusetts
-$2.59M
4
UBS Group
UBS Group
Switzerland
-$2.43M
5
BlackRock
BlackRock
New York
-$2.31M
Name Holding Trade Value Shares
Change 		Change in
Stake
PAWC
51
P.A.W. Capital
Connecticut
$710K -$348K -40,000 -33%
GCP
52
GSA Capital Partners
United Kingdom
$690K +$398K +45,728 +142%
DTL
53
Dynamic Technology Lab
Singapore
$652K +$640K +73,523 New
BNP Paribas Financial Markets
54
BNP Paribas Financial Markets
France
$640K +$551K +63,244 +713%
ECM
55
ExodusPoint Capital Management
New York
$618K +$607K +69,654 New
Victory Capital Management
56
Victory Capital Management
Texas
$617K -$36.8K -4,225 -6%
Squarepoint
57
Squarepoint
New York
$601K +$590K +67,741 New
Ohio Public Employees Retirement System (OPERS)
58
Ohio Public Employees Retirement System (OPERS)
Ohio
$589K +$107K +12,338 +23%
HSBC Holdings
59
HSBC Holdings
United Kingdom
$573K +$61.3K +7,034 +12%
FRM
60
Fox Run Management
Connecticut
$545K +$535K +61,461 New
QCM
61
Quantinno Capital Management
New York
$527K +$357K +41,027 +223%
Balyasny Asset Management
62
Balyasny Asset Management
Illinois
$483K +$118K +13,544 +33%
RhumbLine Advisers
63
RhumbLine Advisers
Massachusetts
$469K -$82.1K -9,428 -15%
VOYA Investment Management
64
VOYA Investment Management
Georgia
$449K -$73.7K -8,466 -14%
A
65
AlphaQuest
New York
$423K -$85.5K -9,813 -17%
PA
66
PharVision Advisers
Florida
$406K +$398K +45,735 New
CPCM
67
Cardinal Point Capital Management
Ontario, Canada
$399K +$47.9K +5,500 +14%
Russell Investments Group
68
Russell Investments Group
United Kingdom
$375K +$888 +102 +0.2%
AllianceBernstein
69
AllianceBernstein
Tennessee
$321K – – –
MF
70
Magnetar Financial
Illinois
$311K +$306K +35,098 New
BFM
71
Boothbay Fund Management
New York
$281K +$276K +31,658 New
SO
72
STRS Ohio
Ohio
$276K – – –
HF
73
HRT Financial
New York
$275K +$270K +31,040 New
Walleye Trading
74
Walleye Trading
New York
$271K -$348K -39,987 -57%
WG
75
Winton Group
United Kingdom
$263K +$259K +29,692 New
1 2
3
4 5

PUBM Hedge Fund Activity: Q4 2025 in Review

152 of the 8,227 institutional investors tracked by Wall St. Rank reported a position in PubMatic (PUBM) for Q4 2025, worth a combined $245M — up 7.2% from $229M a quarter earlier.

Buyers outnumbered sellers: 30 funds opened new PUBM positions and 26 closed out — a net gain of 4 holders — while 52 added to existing stakes and 52 trimmed.

The largest buyer was Millennium Management, adding an estimated $6.09M. The largest seller was Acuitas Investments, exiting entirely with an estimated $2.94M sold.

  • 152 institutional investors held PubMatic (PUBM) as of Q4 2025, up from 150 in Q3 2025.
  • Funds reported $245M of PubMatic stock for Q4 2025, up 7.2% quarter-over-quarter.
  • 30 funds opened new PubMatic positions in Q4 2025 and 26 closed out, a net change of +4 holders.
  • The largest PubMatic buyer in Q4 2025 was Millennium Management, an estimated $6.09M added.
  • The largest PubMatic seller in Q4 2025 was Acuitas Investments, an estimated $2.94M sold.

Based on aggregated 13F filings for Q4 2025.