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Similarweb
SMWB

34 hedge funds and large institutions have $304M invested in Similarweb in 2021 Q3 according to their latest regulatory filings, with 10 funds opening new positions, 5 increasing their positions, 13 reducing their positions, and 23 closing their positions.

New
Increased
Maintained
Reduced
Closed

4% more capital invested

Capital invested by funds: $293M → $304M (+$11.1M)

0% more funds holding in top 10

Funds holding in top 10: 2 → 2 (0)

0.55% less ownership

Funds ownership: 20.09% → 19.55% (-0.55%)

28% less funds holding

Funds holding: 47 → 34 (-13)

57% less first-time investments, than exits

New positions opened: 10 | Existing positions closed: 23

62% less repeat investments, than reductions

Existing positions increased: 5 | Existing positions reduced: 13

Holders
34
Holders Change
-13
Holders Change %
-27.66%
% of All Funds
0.6%
Holding in Top 10
2
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
0.04%
New
10
Increased
5
Reduced
13
Closed
23
Calls
–
Puts
–
Net Calls
–
Net Calls Change
–

Top Buyers

1
Fidelity Investments
Fidelity Investments
Massachusetts
+$26.2M
2
Macquarie Group
Macquarie Group
Australia
+$8.46M
3
MIFH
Migdal Insurance & Financial Holdings
Israel
+$5.31M
4
AIM
ARK Investment Management
Florida
+$3.38M
5
BC
BIT Capital
Germany
+$2.83M

Top Sellers

1
LM
Luminus Management
Texas
-$15.9M
2
IAM
Ion Asset Management
Israel
-$14.3M
3
Holocene Advisors
Holocene Advisors
New York
-$2.96M
4
BlackRock
BlackRock
New York
-$2.72M
5
DKCM
Davidson Kempner Capital Management
New York
-$1.97M
Name Holding Trade Value Shares
Change 		Change in
Stake
ICP
1
ION Crossover Partners
Israel
$121M – – –
Fidelity Investments
2
Fidelity Investments
Massachusetts
$39.9M +$26.2M +1,205,159 +172%
AFT
3
Alpha Family Trust
California
$35.2M -$110K -5,055 -0.3%
MIFH
4
Migdal Insurance & Financial Holdings
Israel
$18.7M +$5.31M +244,443 +38%
Macquarie Group
5
Macquarie Group
Australia
$12.8M +$8.46M +389,301 +177%
BlackRock
6
BlackRock
New York
$12M -$2.72M -125,210 -18%
Capital Research Global Investors
7
Capital Research Global Investors
California
$12M – – –
BAMCO Inc
8
BAMCO Inc
New York
$11.2M +$391K +17,980 +3%
IAM
9
Ion Asset Management
Israel
$8.26M -$14.3M -657,273 -62%
Millennium Management
10
Millennium Management
New York
$7.86M -$922K -42,426 -10%
GCM
11
Ghisallo Capital Management
Massachusetts
$4.83M – – –
Tudor Investment Corp
12
Tudor Investment Corp
Connecticut
$3.88M -$727K -33,481 -15%
AIM
13
ARK Investment Management
Florida
$3.26M +$3.38M +155,712 New
BC
14
BIT Capital
Germany
$2.73M +$2.83M +130,450 New
WP
15
Woodline Partners
California
$2.16M -$13.5K -620 -0.6%
GIPM
16
G2 Investment Partners Management
New York
$2.04M +$2.12M +97,682 New
Marshall Wace
17
Marshall Wace
United Kingdom
$1.03M -$1.83M -84,417 -63%
Russell Investments Group
18
Russell Investments Group
United Kingdom
$893K +$928K +42,738 New
Calamos Advisors
19
Calamos Advisors
Illinois
$831K +$863K +39,710 New
Citadel Advisors
20
Citadel Advisors
Florida
$806K -$1.75M -80,562 -68%
ACA
21
Arena Capital Advisors
California
$658K -$186K -8,557 -21%
LCM
22
Laurion Capital Management
New York
$538K -$202K -9,300 -27%
ECM
23
ExodusPoint Capital Management
New York
$425K +$441K +20,295 New
Man Group
24
Man Group
United Kingdom
$222K -$308K -14,177 -57%
Morgan Stanley
25
Morgan Stanley
New York
$222K +$36.9K +1,700 +19%
1
2 3

SMWB Hedge Fund Activity: Q3 2021 in Review

34 of the 5,712 institutional investors tracked by Wall St. Rank reported a position in Similarweb (SMWB) for Q3 2021, worth a combined $304M — up 3.8% from $293M a quarter earlier.

Sellers outnumbered buyers: 23 funds closed out of SMWB and 10 opened new positions — a net loss of 13 holders — while 13 trimmed existing stakes and 5 added.

The largest buyer was Fidelity Investments, adding an estimated $26.2M. The largest seller was Luminus Management, exiting entirely with an estimated $15.9M sold.

  • 34 institutional investors held Similarweb (SMWB) as of Q3 2021, down from 47 in Q2 2021.
  • Funds reported $304M of Similarweb stock for Q3 2021, up 3.8% quarter-over-quarter.
  • 10 funds opened new Similarweb positions in Q3 2021 and 23 closed out, a net change of -13 holders.
  • The largest Similarweb buyer in Q3 2021 was Fidelity Investments, an estimated $26.2M added.
  • The largest Similarweb seller in Q3 2021 was Luminus Management, an estimated $15.9M sold.

Based on aggregated 13F filings for Q3 2021.