Similarweb Ltd.
SMWB- Exchange
- NYSE
- Industry
- Services-Computer Programming, Data Processing, Etc.
- SEC CIK
- 0001842731
In the last 90 days, Similarweb Ltd. insiders filed 0 open-market purchases and 9 sales; 70 institutions reported holding it in 13F filings for Q2 2026, worth $312.1M in total; ARK Invest is the only superinvestor holding it.
13F holders, Q3 2025
Institutional positions in Similarweb Ltd. as of Sep 30, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 95
- −16 vs. Q2 2025
- Shares held
- 56.5M
- +4.69M (+9.0%) vs. Q2 2025
- Total value
- $526.1M
- +$111.4M (+26.9%) vs. Q2 2025
- New holders
- 11
- 31 more added
- Sold out
- 27
- 34 more reduced
Compare with Q2 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting SMWB on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 70 | $312.1M |
| Q1 2026 | 81 | $144.4M |
| Q4 2025 | 100 | $454.1M |
| Q3 2025 | 95 | $526.1M |
| Q2 2025 | 111 | $414.8M |
| Q1 2025 | 110 | $460.5M |
| Q4 2024 | 113 | $739.3M |
| Q3 2024 | 94 | $411.8M |
| Q2 2024 | 77 | $323.3M |
| Q1 2024 | 74 | $370.7M |
| Q4 2023 | 55 | $208.3M |
| Q3 2023 | 52 | $286.9M |
| Q2 2023 | 49 | $257.8M |
| Q1 2023 | 42 | $274.2M |
| Q4 2022 | 47 | $261.4M |
| Q3 2022 | 45 | $160.0M |
| Q2 2022 | 48 | $225.9M |
| Q1 2022 | 43 | $366.7M |
| Q4 2021 | 45 | $500.6M |
| Q3 2021 | 34 | $303.9M |
| Q2 2021 | 47 | $294.1M |
| Q1 2021 | 0 | $0 |
Institutions, Q3 2025
Shares, value and share of portfolio for each institution holding Similarweb Ltd.; share changes are against Q2 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Two Sigma Investments, LP | 0 | $0 | 0.00% | −81,111−100.0% | Sold out |
| Hood River Capital Management LLC | 0 | $0 | 0.00% | −78,446−100.0% | Sold out |
| Petrus Trust Company, LTA | 0 | $0 | 0.00% | −42,211−100.0% | Sold out |
| Voloridge Investment Management, LLC | 0 | $0 | 0.00% | −41,771−100.0% | Sold out |
| Jefferies Financial Group Inc. | 0 | $0 | 0.00% | −36,000−100.0% | Sold out |
| Magnetar Financial LLC | 0 | $0 | 0.00% | −34,633−100.0% | Sold out |
| SG Americas Securities, LLC | 0 | $0 | 0.00% | −32,580−100.0% | Sold out |
| Cetera Investment Advisers | 0 | $0 | 0.00% | −30,726−100.0% | Sold out |
| Man Group plc | 0 | $0 | 0.00% | −26,700−100.0% | Sold out |
| Papamarkou Wellner Asset Management inc. | 0 | $0 | 0.00% | −21,199−100.0% | Sold out |
| Nebula Research & Development LLC | 0 | $0 | 0.00% | −18,647−100.0% | Sold out |
| Antipodes Partners Ltd | 0 | $0 | 0.00% | −17,510−100.0% | Sold out |
| Fox Run Management, L.L.C. | 0 | $0 | 0.00% | −16,497−100.0% | Sold out |
| MQS Management LLC | 0 | $0 | 0.00% | −15,881−100.0% | Sold out |
| Schonfeld Strategic Advisors LLC | 0 | $0 | 0.00% | −14,702−100.0% | Sold out |
| Harbert Fund Advisors, Inc. | 0 | $0 | 0.00% | −12,323−100.0% | Sold out |
| Eqis Capital Management, Inc. | 0 | $0 | 0.00% | −11,471−100.0% | Sold out |
| Aquatic Capital Management LLC | 0 | $0 | 0.00% | −10,615−100.0% | Sold out |
| Quarry LP | 0 | $0 | 0.00% | −2,674−100.0% | Sold out |
| Raymond James Financial Inc | 0 | $0 | 0.00% | −1,230−100.0% | Sold out |
| Walleye Capital LLC | 0 | $0 | 0.00% | −763−100.0% | Sold out |
| Caitong International Asset Management Co., Ltd | 0 | $0 | 0.00% | −721−100.0% | Sold out |