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 |
|---|---|---|---|---|---|
| Naspers Ltd | 11,173,265 | $29.2M | 11.53% | 00.0% | Unchanged |
| Viola Ventures V.C. Management 4 Ltd. | 10,810,778 | $28.2M | 81.08% | 00.0% | Unchanged |
| Menora Mivtachim Holdings Ltd. | 4,015,494 | $10.5M | 0.05% | 00.0% | Unchanged |
| Y.D. More Investments Ltd | 1,151,298 | $8.34M | 0.33% | −20,000−1.7% | Reduced |
| ION Crossover Partners Ltd | 3,030,826 | $7.91M | 21.45% | 00.0% | Unchanged |
| Ulysses Management LLC | 2,998,474 | $7.83M | 2.95% | 00.0% | Unchanged |
| Wellington Management Group LLP | 2,966,757 | $7.74M | 0.00% | −34,676−1.2% | Reduced |
| S Squared Technology, LLC | 1,600,000 | $4.18M | 1.58% | +824,839+106.4% | Added |
| CenterBook Partners LP | 1,325,113 | $3.46M | 0.19% | +364,117+37.9% | Added |
| Alpha Family Trust | 658,935 | $2.26M | 1.10% | 00.0% | Unchanged |
| Millennium Management LLC | 825,763 | $2.16M | 0.00% | +467,956+130.8% | Added |
| Mirabella Financial Services LLP | 792,664 | $2.07M | 0.20% | +792,664 | New |
| Renaissance Technologies LLC | 739,673 | $1.93M | 0.00% | +378,200+104.6% | Added |
| Herald Investment Management Ltd | 645,465 | $1.68M | 0.23% | 00.0% | Unchanged |
| CDC Financial, Inc. | 639,014 | $1.67M | 1.38% | +497,291+350.9% | Added |
| Marshall Wace, LLP | 638,188 | $1.67M | 0.00% | +345,705+118.2% | Added |
| Sphera Management Technology Funds Ltd | 615,000 | $1.61M | 0.91% | +135,000+28.1% | Added |
| Morgan Stanley | 591,863 | $1.54M | 0.00% | +335,203+130.6% | Added |
| Connor, Clark & Lunn Investment Management Ltd. | 533,634 | $1.39M | 0.00% | −265,588−33.2% | Reduced |
| P.A.W. Capital Corp | 500,000 | $1.30M | 1.04% | +260,000+108.3% | Added |
| Citadel Advisors LLC | 476,005 | $1.24M | 0.00% | +275,891+137.9% | Added |
| Qube Research & Technologies Ltd | 416,146 | $1.09M | 0.00% | +399,564+2,409.6% | Added |
| Acadian Asset Management LLC | 405,607 | $1.05M | 0.00% | +247,196+156.0% | Added |
| Nano Cap New Millennium Growth Fund L P | 390,000 | $1.02M | 0.95% | +222,500+132.8% | Added |
| Penn Capital Management Co Inc | 360,366 | $940.6K | 0.07% | −1,228,314−77.3% | Reduced |
| ARK Investment Management LLCSuperinvestorARK Invest | 352,070 | $918.9K | 0.01% | +115,645+48.9% | Added |
| PEAK6 LLC | 321,156 | $838.2K | 0.02% | +320,058+29,149.2% | Added |
| Schonfeld Strategic Advisors LLC | 289,174 | $754.7K | 0.01% | +289,174 | New |
| Militia Capital Management LLC | 236,000 | $616.0K | 0.14% | +236,000 | New |
| Jane Street Group, LLC | 231,266 | $603.6K | 0.00% | +45,058+24.2% | Added |
| XTX Topco Ltd | 228,880 | $597.4K | 0.01% | +228,880 | New |
| Phoenix Holdings Ltd. | 216,904 | $566.1K | 0.01% | −4,068,882−94.9% | Reduced |
| Lavelle Capital LP | 202,727 | $529.1K | 0.33% | 00.0% | Unchanged |
| UBS Group AG | 198,543 | $518.2K | 0.00% | −338,006−63.0% | Reduced |
| Persistent Asset Partners Ltd | 180,000 | $469.8K | 0.18% | 00.0% | Unchanged |
| JPMorgan Chase & Co | 175,207 | $434.5K | 0.00% | +154,958+765.3% | Added |
| Gsa Capital Partners LLP | 152,105 | $397.0K | 0.02% | +152,105 | New |
| Jump Financial, LLC | 147,616 | $385.3K | 0.01% | +84,295+133.1% | Added |
| BlackRock, Inc. | 127,504 | $332.8K | 0.00% | −849,010−86.9% | Reduced |
| Susquehanna Fundamental Investments, LLC | 125,623 | $327.9K | 0.01% | +125,623 | New |
| Palogic Value Management, L.P. | 114,000 | $297.5K | 0.13% | +46,577+69.1% | Added |
| Citigroup Inc | 110,174 | $287.6K | 0.00% | +108,840+8,158.9% | Added |
| State Street Corp | 109,396 | $285.5K | 0.00% | −260,605−70.4% | Reduced |
| Point72 Asset Management, L.P. | 100,204 | $261.5K | 0.00% | +11,055+12.4% | Added |
| Quadrature Capital Ltd | 94,234 | $246.0K | 0.00% | +94,234 | New |
| Oppenheimer & Co Inc | 91,088 | $237.7K | 0.00% | +1,698+1.9% | Added |
| Voleon Capital Management LP | 88,704 | $231.5K | 0.00% | +88,704 | New |
| Engineers Gate Manager LP | 87,418 | $228.2K | 0.00% | +24,618+39.2% | Added |
| Two Sigma Investments, LP | 79,076 | $206.4K | 0.00% | +79,076 | New |
| Federated Hermes, Inc. | 70,000 | $182.7K | 0.00% | +40,000+133.3% | Added |
| Bank of America Corp | 63,985 | $167.0K | 0.00% | +52,863+475.3% | Added |
| Toroso Investments, LLC | 61,626 | $160.8K | 0.00% | +3,330+5.7% | Added |
| Centiva Capital, LP | 60,122 | $156.9K | 0.01% | +60,122 | New |
| D. E. Shaw & Co., Inc. | 58,552 | $152.8K | 0.00% | +30,176+106.3% | Added |
| Axq Capital, LP | 52,410 | $136.8K | 0.02% | +52,410 | New |
| Pathstone Holdings, LLC | 50,390 | $131.5K | 0.00% | +19,560+63.4% | Added |
| Russell Investments Group, Ltd. | 52,019 | $129.0K | 0.00% | −96,320−64.9% | Reduced |
| Goldman Sachs Group Inc | 42,643 | $111.3K | 0.00% | −15,191−26.3% | Reduced |
| Graham Capital Management, L.P. | 36,634 | $95.6K | 0.00% | +36,634 | New |
| HRT Financial LP | 22,670 | $59.0K | 0.00% | −35,684−61.2% | Reduced |
| Virtu Financial LLC | 20,111 | $52.0K | 0.00% | +20,111 | New |
| PharVision Advisers, LLC | 18,927 | $49.4K | 0.50% | −16,757−47.0% | Reduced |
| New York State Common Retirement Fund | 18,774 | $49.0K | 0.00% | −834,141−97.8% | Reduced |
| Aquatic Capital Management LLC | 18,008 | $47.0K | 0.00% | +18,008 | New |
| Squarepoint Ops LLC | 13,020 | $34.0K | 0.00% | +13,020 | New |
| Lazard Asset Management LLC | 11,228 | $29.3K | 0.00% | −2,508−18.3% | Reduced |
| Barclays PLC | 10,611 | $27.7K | 0.00% | +9,932+1,462.7% | Added |
| Cresset Asset Management, LLC | 10,144 | $26.5K | 0.00% | +10,144 | New |
| Meitav Dash Investments Ltd | 10,000 | $26.1K | 0.00% | 00.0% | Unchanged |
| Wells Fargo & Company | 8,200 | $21.4K | 0.00% | +7,400+925.0% | Added |
| Simplex Trading, LLC | 2,904 | $7.58K | 0.00% | −16,093−84.7% | Reduced |
| SBI Securities Co., Ltd. | 1,024 | $2.67K | 0.00% | +1+0.1% | Added |
| BNP Paribas Arbitrage, SA | 890 | $2.32K | 0.00% | +670+304.5% | Added |
| Royal Bank of Canada | 200 | $1.00K | 0.00% | −312−60.9% | Reduced |
| Advisor Group Holdings, Inc. | 300 | $783 | 0.00% | −83−21.7% | Reduced |
| Caitong International Asset Management Co., Ltd | 242 | $632 | 0.00% | +224+1,244.4% | Added |
| Jones Financial Companies LLLP | 100 | $252 | 0.00% | 00.0% | Unchanged |
| Assetmark, Inc | 48 | $125 | 0.00% | +48 | New |
| Smartleaf Asset Management LLC | 29 | $72 | 0.00% | −18−38.3% | Reduced |
| Northwestern Mutual Wealth Management Co | 12 | $31 | 0.00% | +12 | New |
| FMR LLC | 6 | $16 | 0.00% | 00.0% | Unchanged |
| Migdal Insurance & Financial Holdings Ltd. | 0 | $0 | 0.00% | −3,106,157−100.0% | Sold out |
| Nuveen, LLC | 0 | $0 | 0.00% | −1,520,398−100.0% | Sold out |
| First Eagle Investment Management, LLC | 0 | $0 | 0.00% | −645,647−100.0% | Sold out |
| Royce & Associates LP | 0 | $0 | 0.00% | −537,406−100.0% | Sold out |
| Portolan Capital Management, LLC | 0 | $0 | 0.00% | −492,861−100.0% | Sold out |
| Group One Trading, L.P. | 0 | $0 | 0.00% | −147,063−100.0% | Sold out |
| Ameriprise Financial Inc | 0 | $0 | 0.00% | −138,422−100.0% | Sold out |
| Numerai GP LLC | 0 | $0 | 0.00% | −117,949−100.0% | Sold out |
| Trexquant Investment LP | 0 | $0 | 0.00% | −108,038−100.0% | Sold out |
| Swiss National Bank | 0 | $0 | 0.00% | −87,474−100.0% | Sold out |
| Northern Trust Corp | 0 | $0 | 0.00% | −80,549−100.0% | Sold out |
| SEI Investments Co | 0 | $0 | 0.00% | −76,702−100.0% | Sold out |
| Blair William & Co | 0 | $0 | 0.00% | −71,044−100.0% | Sold out |
| Public Employees Retirement System of Ohio | 0 | $0 | 0.00% | −60,419−100.0% | Sold out |
| Legal & General Group Plc | 0 | $0 | 0.00% | −56,620−100.0% | Sold out |
| California State Teachers Retirement System | 0 | $0 | 0.00% | −48,217−100.0% | Sold out |
| UBS Asset Management Americas Inc | 0 | $0 | 0.00% | −43,261−100.0% | Sold out |
| PDT Partners, LLC | 0 | $0 | 0.00% | −40,794−100.0% | Sold out |
| Verition Fund Management LLC | 0 | $0 | 0.00% | −35,844−100.0% | Sold out |