How many institutional investors hold SMWB?

4 tracked institutional investors disclosed a position in SMWB (SIMILARWEB LTD) in their most recent 13F filing.

Who is the largest institutional holder of SMWB?

Ken Griffin, Citadel Advisors, holds the largest disclosed position in SMWB, valued at $9M.

Where does this SMWB ownership data come from?

SEC Form 13F-HR filings, accessed via EDGAR. 13F filings are disclosed quarterly with a 45-day reporting delay and cover U.S.-listed long equity positions only. This is not investment advice.

SMWB — SIMILARWEB LTD

Name: SIMILARWEB LTD (SMWB) — Institutional Ownership
Creator: InvestorLens
License: https://www.sec.gov/about/website-policies

Public company

For educational research only.InvestorLens analyzes public regulatory filings (SEC EDGAR, STOCK Act PTRs) that may be delayed by 45 days or more. Information shown is historical and is not financial, legal, or tax advice, nor a recommendation or solicitation to buy or sell any security. Always do your own research.

InvestorLens aggregates public filing data to show which tracked investors reported holdings in this stock. Dollar values represent reported position values, not market capitalization, and may be delayed up to 45 days. Not a recommendation.

Sourced from SEC EDGAR public filings

About SIMILARWEB LTD (SMWB)

SIMILARWEB LTD (SMWB) appears in the most recent 13F filings of 4 tracked institutional investors. The largest disclosed position is held by Ken Griffin (Citadel Advisors), valued at $9M. Across recent filings, tracked investors recorded 2 new positions, 2 increased, 0 reduced, and 0 exited. All data sourced from SEC 13F filings.

Smart Money Consensus™

Based on recent institutional activity in SMWB

100

/100

Strong Institutional Accumulation

Added / Increased4

Reduced0

Exited0

BearishBullish

Crowded Trade Score™

How many top investors track SMWB

/100

Emerging Interest

4investors

A small number of top investors own this.

UndiscoveredCrowded

151015+

SMWB Ownership Composition

How SIMILARWEB LTD is held across tracked investor types, based on reported 13F positions.

Dominant Type

Other

76% of tracked value

Institutions

tracked investors

Total Reported

$4.9M

combined 13F value

Other75.9%
Growth Funds18.7%
Hedge Funds5.3%

Other(2)

75.9%

Growth Funds(1)

18.7%

Hedge Funds(1)

5.3%

Tracked investors reporting SMWB

Investor	Firm	Shares	Market value	% of portfolio	As of
Ken Griffin	Citadel Advisors	600.1K	$1.6M	0.00%	Mar 31, 2026
Izzy Englander	Millennium Management	825.8K	$2.2M	0.00%	Mar 31, 2026
Cathie Wood	ARK Investment Management	352.1K	$918.9K	0.01%	Mar 31, 2026
Steve Cohen	Point72 Asset Management	100.2K	$261.5K	0.00%	Mar 31, 2026

Ken GriffinMar 31, 2026
Citadel Advisors
Shares
600.1K
Value
$1.6M
% Portfolio
0.00%
Izzy EnglanderMar 31, 2026
Millennium Management
Shares
825.8K
Value
$2.2M
% Portfolio
0.00%
Cathie WoodMar 31, 2026
ARK Investment Management
Shares
352.1K
Value
$918.9K
% Portfolio
0.01%
Steve CohenMar 31, 2026
Point72 Asset Management
Shares
100.2K
Value
$261.5K
% Portfolio
0.00%

Recent activity

Investor	Action	Δ %	Current value	Filing date
Cathie Wood	Increased	48.91%	$918.9K	May 12, 2026
Ken Griffin	New	—	$3.6M	Feb 17, 2026
Cathie Wood	Increased	2.77%	$1.8M	Feb 11, 2026
Cathie Wood	New	—	$2.1M	Nov 12, 2025

Cathie Wood
Increased
$918.9K(48.91%)May 12, 2026
Ken Griffin
New
$3.6MFeb 17, 2026
Cathie Wood
Increased
$1.8M(2.77%)Feb 11, 2026
Cathie Wood
New
$2.1MNov 12, 2025

Frequently asked questions

How many institutional investors hold SMWB?: 4 tracked institutional investors disclosed a position in SMWB (SIMILARWEB LTD) in their most recent 13F filing.
Who is the largest institutional holder of SMWB?: Ken Griffin, Citadel Advisors, holds the largest disclosed position in SMWB, valued at $9M.
Did institutional ownership of SMWB increase or decrease?: Across recent 13F filings, tracked investors recorded 2 new positions, 2 increased, 0 reduced, and 0 fully exited SMWB.
Where does this SMWB ownership data come from?: SEC Form 13F-HR filings, accessed via EDGAR. 13F filings are disclosed quarterly with a 45-day reporting delay and cover U.S.-listed long equity positions only. This is not investment advice.