Who owns SIMILARWEB LTD.?
Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.
Institutional ownership of SMWB from SEC Form 13F filings across 70 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
As of the 2026-06-30 reporting period, 70 institutions disclosed 40.1M shares of SIMILARWEB LTD. worth $245.8M — about 47.2% of shares outstanding; the largest disclosed holder is NASPERS LTD. Source: SEC Form 13F filings, parsed by EvidInvest.
70
13F holders
$245.8M
value, 2026 filers
47.2%
of shares outstanding (40.1M sh)
16
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30 · % of fund = share of the manager's own book · % of co. = share of SMWB's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | NASPERS LTD | 11.2M | $68.5M | 81.2% | 13.2% | 0.0% |
| 2 | MENORA MIVTACHIM HOLDINGS LTD. | 4.0M | $24.6M | 0.1% | 4.7% | 0.0% |
| 3 | WELLINGTON MANAGEMENT GROUP LLP | 3.6M | $22.2M | 0.0% | 4.3% | +22.2% |
| 4 | ION Crossover Partners Ltd | 3.0M | $18.6M | 24.9% | 3.6% | 0.0% |
| 5 | Ulysses Management LLC | 2.9M | $18.0M | 3.5% | 3.5% | -2.3% |
| 6 | S SQUARED TECHNOLOGY, LLC | 1.7M | $10.4M | 3.2% | 2% | +5.6% |
| 7 | Schonfeld Strategic Advisors LLC | 1.2M | $7.4M | 0.0% | 1.4% | +318.7% |
| 8 | Y.D. More Investments Ltd | 1.1M | $7.0M | 0.2% | 1.4% | -0.4% |
| 9 | ARK Investment Management LLC | 834,663 | $5.1M | 0.0% | 1% | +137.1% |
| 10 | RENAISSANCE TECHNOLOGIES LLC | 713,728 | $4.4M | 0.0% | 0.8% | -3.5% |
| 11 | CDC Financial, Inc. | 674,233 | $4.1M | 1.7% | 0.8% | +5.5% |
| 12 | Alpha Family Trust | 658,935 | $4.0M | 1.6% | 0.8% | 0.0% |
| 13 | NANO CAP NEW MILLENNIUM GROWTH FUND L P | 650,000 | $4.0M | 3.1% | 0.8% | +66.7% |
| 14 | HERALD INVESTMENT MANAGEMENT Ltd | 645,465 | $4.0M | 0.5% | 0.8% | 0.0% |
| 15 | P.A.W. CAPITAL CORP | 640,000 | $3.9M | 3.1% | 0.8% | +28.0% |
| 16 | Sphera Management Technology Funds Ltd | 615,000 | $3.8M | 1.3% | 0.7% | 0.0% |
| 17 | CenterBook Partners LP | 599,737 | $3.7M | 0.2% | 0.7% | -54.7% |
| 18 | Lotus Technology Management, LPNEW | 531,409 | $3.4M | 4.2% | 0.6% | new |
| 19 | JANE STREET GROUP, LLC | 513,277 | $3.1M | 0.0% | 0.6% | +121.9% |
| 20 | PEAK6 LLC | 484,822 | $3.0M | 0.0% | 0.6% | +51.0% |
| 21 | Connor, Clark & Lunn Investment Management Ltd. | 445,691 | $2.7M | 0.0% | 0.5% | -16.5% |
| 22 | UBS Group AG | 403,328 | $2.5M | 0.0% | 0.5% | +103.1% |
| 23 | CITADEL ADVISORS LLC | 346,735 | $2.1M | 0.0% | 0.4% | -27.2% |
| 24 | MORGAN STANLEY | 268,203 | $1.6M | 0.0% | 0.3% | -54.7% |
| 25 | LAVELLE CAPITAL LP | 202,727 | $1.2M | 0.5% | 0.2% | 0.0% |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.