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