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Similarweb
SMWB

Overview Fund Activity

110 hedge funds and large institutions have $330M invested in Similarweb in 2025 Q2 according to their latest regulatory filings, with 21 funds opening new positions, 46 increasing their positions, 28 reducing their positions, and 20 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
110
Holders Change
+1
Holders Change %
+0.92%
% of All Funds
1.48%
Holding in Top 10
4
Holding in Top 10 Change
-1
Holding in Top 10 Change %
-20%
% of All Funds
0.05%
New
21
Increased
46
Reduced
28
Closed
20
Calls
$6.59M
Puts
$8.3M
Net Calls
-$1.71M
Net Calls Change
-$4.79M

Top Buyers

1
CP
CenterBook Partners
Connecticut
$11.3M
2
NL
Nuveen LLC
North Carolina
$10.2M
3
Morgan Stanley
Morgan Stanley
New York
$7.16M
4
PCM
Penn Capital Management
Pennsylvania
$3.23M
5
Citadel Advisors
Citadel Advisors
Florida
$6.9M

Top Sellers

1
Jennison Associates
Jennison Associates
New York
$0
2
PF
Phoenix Financial
Israel
$21.1M
3
T. Rowe Price Investment Management
T. Rowe Price Investment Management
Maryland
$0
4
CCPM
Cooper Creek Partners Management
New York
$0
5
SSA
Schonfeld Strategic Advisors
New York
$115K
Name Holding Trade Value Shares
Change 		Shares
Change %
N
1
Naspers
South Africa
$87.6M – – –
MIFH
2
Migdal Insurance & Financial Holdings
Israel
$23.6M +$1.91M +243,600 +9%
UM
3
Ulysses Management
New York
$23.5M +$1.96M +249,766 +9%
PF
4
Phoenix Financial
Israel
$21.1M -$12.4M -956,800 -37%
MMH
5
Menora Mivtachim Holdings
Israel
$18.2M +$629K +80,272 +4%
CP
6
CenterBook Partners
Connecticut
$11.3M +$4.97M +634,114 +79%
NL
7
Nuveen LLC
North Carolina
$10.2M +$4.5M +574,143 +79%
YDMI
8
Y.D. More Investments
Israel
$9.68M -$1.3M -165,565 -12%
SGM
9
Scalar Gauge Management
Texas
$8.75M -$759K -96,856 -8%
Wellington Management Group
10
Wellington Management Group
Massachusetts
$7.31M +$339K +43,212 +5%
Connor, Clark & Lunn Investment Management (CC&L)
11
Connor, Clark & Lunn Investment Management (CC&L)
British Columbia, Canada
$7.22M +$898K +114,497 +14%
Morgan Stanley
12
Morgan Stanley
New York
$7.16M +$4.49M +572,884 +168%
Citadel Advisors
13
Citadel Advisors
Florida
$6.9M +$2.98M +380,265 +76%
AFT
14
Alpha Family Trust
California
$6.68M – – –
BlackRock
15
BlackRock
New York
$6.66M +$144K +18,386 +2%
PCM
16
Portolan Capital Management
Massachusetts
$5.7M +$2.8M +357,401 +97%
SST
17
S Squared Technology
New York
$5.38M -$2.46M -313,819 -31%
HIM
18
Herald Investment Management
United Kingdom
$4.71M +$2.36M +300,000 +100%
CSS
19
Cubist Systematic Strategies
Connecticut
$3.26M +$1.8M +230,088 +124%
PCM
20
Penn Capital Management
Pennsylvania
$3.23M +$3.23M +412,166 New
SMTF
21
Sphera Management Technology Funds
Israel
$3.16M +$832K +106,123 +36%
Renaissance Technologies
22
Renaissance Technologies
New York
$2.79M +$606K +77,300 +28%
CI
23
Ceera Investments
Texas
$2.5M – – –
State Street
24
State Street
Massachusetts
$2.43M +$279K +35,606 +13%
Millennium Management
25
Millennium Management
New York
$2.42M +$2.22M +282,930 +1,112%
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