Company · Ownership research

SIMILARWEB LTD. SMWB

CIK 0001842731 · CUSIP M84137104

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP M84137104 (SMWB), not CUSIP M84137904 (SMWB), CUSIP M84137954 (SMWB), and does not merge CUSIPs.

This page lists the top 20 of 70 rows by value; the complete set is available through the API.

Top 20 institutions

Weight means this stock's share of the manager's own portfolio.

By reported value

#	Manager	Value	Manager weight	Change vs prior	Source
01	NASPERS LTD CIK 1106051 · View history	$68.49M 11,173,265 shares	81.19%	0(0.00%)Unchanged	SEC filing ↗ Aug 11, 2026	▾
02	MENORA MIVTACHIM HOLDINGS LTD. CIK 1351917 · View history	$24.61M 4,015,494 shares	0.10%	0(0.00%)Unchanged	SEC filing ↗ Aug 13, 2026	▾
03	WELLINGTON MANAGEMENT GROUP LLP CIK 902219 · View history	$22.22M 3,624,685 shares	0.00%	+657.93K(+22.20%)Added	SEC filing ↗ Aug 14, 2026	▾
04	ION Crossover Partners Ltd CIK 1803307 · View history	$18.58M 3,030,826 shares	24.88%	0(0.00%)Unchanged	SEC filing ↗ Aug 14, 2026	▾
05	Ulysses Management LLC CIK 1510912 · View history	$17.95M 2,928,474 shares	6.21%	-70.00K(-2.30%)Reduced	SEC filing ↗ Aug 14, 2026	▾
06	S Squared Technology, LLC CIK 1322924 · View history	$10.36M 1,690,000 shares	3.21%	+90.00K(+5.60%)Added	SEC filing ↗ Aug 14, 2026	▾
07	Schonfeld Strategic Advisors LLC CIK 1665241 · View history	$7.42M 1,210,629 shares	0.04%	+921.46K(+318.70%)Added	SEC filing ↗ Aug 14, 2026	▾
08	Y.D. More Investments Ltd CIK 1870364 · View history	$7.03M 1,147,035 shares	0.22%	-4.26K(-0.40%)Reduced	SEC filing ↗ Aug 5, 2026	▾
09	ARK Investment Management LLC CIK 1697748 · View history	$5.12M 834,663 shares	0.03%	+482.59K(+137.10%)Added	SEC filing ↗ Aug 14, 2026	▾
10	RENAISSANCE TECHNOLOGIES LLC CIK 1037389 · View history	$4.38M 713,728 shares	0.01%	-25.95K(-3.50%)Reduced	SEC filing ↗ Aug 13, 2026	▾
11	CDC Financial, Inc. CIK 2077836 · View history	$4.13M 674,233 shares	3.18%	+35.22K(+5.50%)Added	SEC filing ↗ Aug 14, 2026	▾
12	Alpha Family Trust CIK 1568991 · View history	$4.04M 658,935 shares	1.62%	0(0.00%)Unchanged	SEC filing ↗ Aug 10, 2026	▾
13	NANO CAP NEW MILLENNIUM GROWTH FUND L P CIK 1277890 · View history	$3.98M 650,000 shares	3.06%	+260.00K(+66.70%)Added	SEC filing ↗ Aug 14, 2026	▾
14	HERALD INVESTMENT MANAGEMENT Ltd CIK 1512022 · View history	$3.96M 645,465 shares	0.54%	0(0.00%)Unchanged	SEC filing ↗ Jul 23, 2026	▾
15	P.A.W. CAPITAL CORP CIK 949853 · Amended · View history	$3.92M 640,000 shares	1.24%	+140.00K(+28.00%)Added	SEC filing ↗ Nov 9, 2026	▾
16	Sphera Management Technology Funds Ltd CIK 2030525 · View history	$3.77M 615,000 shares	1.32%	0(0.00%)Unchanged	SEC filing ↗ Aug 14, 2026	▾
17	CenterBook Partners LP CIK 1872738 · View history	$3.68M 599,737 shares	0.18%	-725.38K(-54.70%)Reduced	SEC filing ↗ Aug 11, 2026	▾
18	Lotus Technology Management, LP CIK 2095243 · View history	$3.40M 531,409 shares	4.18%	+531.41KNew	SEC filing ↗ Aug 14, 2026	▾
19	JANE STREET GROUP, LLC CIK 1595888 · View history	$3.15M 513,277 shares	0.00%	+282.01K(+121.90%)Added	SEC filing ↗ Aug 14, 2026	▾
20	PEAK6 LLC CIK 1389958 · View history	$2.97M 484,822 shares	0.07%	+163.67K(+51.00%)Added	SEC filing ↗ Aug 13, 2026	▾

Showing 20 / 70 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

Cancelled or null records excluded

Disclosed shares

40,072,797

Not deduplicated across managers

Disclosed value

$245.80M

Not market cap or free float

Reporting institutions by quarter

Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.

SIMILARWEB LTD. · Q2 2026

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Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.