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, Q1 2026
Institutional positions in Similarweb Ltd. as of Mar 31, 2026. 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
- 81
- −18 vs. Q4 2025
- Shares held
- 53.1M
- −7.57M (−12.5%) vs. Q4 2025
- Total value
- $144.4M
- −$309.5M (−68.2%) vs. Q4 2025
- New holders
- 18
- 33 more added
- Sold out
- 36
- 18 more reduced
1 institution that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 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, Q1 2026
Shares, value and share of portfolio for each institution holding Similarweb Ltd.; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Zurcher Kantonalbank (Zurich Cantonalbank) | 0 | $0 | 0.00% | −31,592−100.0% | Sold out |
| ExodusPoint Capital Management, LP | 0 | $0 | 0.00% | −29,931−100.0% | Sold out |
| Fox Run Management, L.L.C. | 0 | $0 | 0.00% | −19,528−100.0% | Sold out |
| Teacher Retirement System of Texas | 0 | $0 | 0.00% | −18,016−100.0% | Sold out |
| Geode Capital Management, LLC | 0 | $0 | 0.00% | −18,036−100.0% | Sold out |
| Police & Firemen's Retirement System of New Jersey | 0 | $0 | 0.00% | −16,124−100.0% | Sold out |
| Two Sigma Advisers, LP | 0 | $0 | 0.00% | −13,000−100.0% | Sold out |
| Boothbay Fund Management, LLC | 0 | $0 | 0.00% | −11,961−100.0% | Sold out |
| Skopos Labs, Inc. | 0 | $0 | 0.00% | −11,732−100.0% | Sold out |
| Quantbot Technologies LP | 0 | $0 | 0.00% | −11,347−100.0% | Sold out |
| KLP Kapitalforvaltning AS | 0 | $0 | 0.00% | −8,100−100.0% | Sold out |
| Deutsche Bank AG | 0 | $0 | 0.00% | −5,667−100.0% | Sold out |
| Quarry LP | 0 | $0 | 0.00% | −2,409−100.0% | Sold out |
| Walleye Trading LLC | 0 | $0 | 0.00% | −871−100.0% | Sold out |
| Crewe Advisors LLC | 0 | $0 | 0.00% | −734−100.0% | Sold out |
| State of Wyoming | 0 | $0 | 0.00% | −544−100.0% | Sold out |
| GWM Advisors LLC | 0 | $0 | 0.00% | −109−100.0% | Sold out |
| Vanguard Group Inc | – | – | – | – | Not filed |