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, Q4 2025
Institutional positions in Similarweb Ltd. as of Dec 31, 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
- 100
- +8 vs. Q3 2025
- Shares held
- 60.7M
- +4.27M (+7.6%) vs. Q3 2025
- Total value
- $454.1M
- −$70.9M (−13.5%) vs. Q3 2025
- New holders
- 19
- 30 more added
- Sold out
- 11
- 32 more reduced
3 institutions that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 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, Q4 2025
Shares, value and share of portfolio for each institution holding Similarweb Ltd.; share changes are against Q3 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| FMR LLC | 6 | $45 | 0.00% | 00.0% | Unchanged |
| Caitong International Asset Management Co., Ltd | 18 | $135 | 0.00% | +18 | New |
| Smartleaf Asset Management LLC | 47 | $350 | 0.00% | +47 | New |
| Jones Financial Companies LLLP | 100 | $749 | 0.00% | 00.0% | Unchanged |
| GWM Advisors LLC | 109 | $816 | 0.00% | 00.0% | Unchanged |
| BNP Paribas Arbitrage, SA | 220 | $1.65K | 0.00% | +1+0.5% | Added |
| Advisor Group Holdings, Inc. | 383 | $2.87K | 0.00% | −260−40.4% | Reduced |
| Royal Bank of Canada | 512 | $3.00K | 0.00% | −1,100−68.2% | Reduced |
| State of Wyoming | 544 | $4.08K | 0.00% | +544 | New |
| Barclays PLC | 679 | $5.09K | 0.00% | +557+456.6% | Added |
| Crewe Advisors LLC | 734 | $5.50K | 0.00% | 00.0% | Unchanged |
| Wells Fargo & Company | 800 | $5.99K | 0.00% | +266+49.8% | Added |
| Walleye Trading LLC | 871 | $6.52K | 0.00% | −8,057−90.2% | Reduced |
| SBI Securities Co., Ltd. | 1,023 | $7.66K | 0.00% | 00.0% | Unchanged |
| PEAK6 LLC | 1,098 | $8.22K | 0.00% | −44,879−97.6% | Reduced |
| Citigroup Inc | 1,334 | $9.99K | 0.00% | −972−42.2% | Reduced |
| Quarry LP | 2,409 | $18.0K | 0.00% | +2,409 | New |
| Deutsche Bank AG | 5,667 | $42.4K | 0.00% | 00.0% | Unchanged |
| KLP Kapitalforvaltning AS | 8,100 | $60.7K | 0.00% | 00.0% | Unchanged |
| Meitav Dash Investments Ltd | 10,000 | $74.9K | 0.00% | 00.0% | Unchanged |
| Bank of America Corp | 11,122 | $83.3K | 0.00% | −45,091−80.2% | Reduced |
| Quantbot Technologies LP | 11,347 | $85.0K | 0.00% | +11,347 | New |
| Skopos Labs, Inc. | 11,732 | $85.2K | 0.00% | +11,732 | New |
| Boothbay Fund Management, LLC | 11,961 | $89.6K | 0.00% | +11,961 | New |
| Two Sigma Advisers, LP | 13,000 | $97.4K | 0.00% | −11,800−47.6% | Reduced |
| Lazard Asset Management LLC | 13,736 | $102.9K | 0.00% | −6,025−30.5% | Reduced |
| Police & Firemen's Retirement System of New Jersey | 16,124 | $120.8K | 0.00% | 00.0% | Unchanged |
| Qube Research & Technologies Ltd | 16,582 | $124.2K | 0.00% | +16,582 | New |
| Geode Capital Management, LLC | 18,036 | $134.7K | 0.00% | +1,305+7.8% | Added |
| Teacher Retirement System of Texas | 18,016 | $134.9K | 0.00% | +1,608+9.8% | Added |
| Simplex Trading, LLC | 18,997 | $142.3K | 0.00% | −66,225−77.7% | Reduced |
| Fox Run Management, L.L.C. | 19,528 | $146.3K | 0.02% | +19,528 | New |
| JPMorgan Chase & Co | 20,249 | $151.7K | 0.00% | −1,276−5.9% | Reduced |
| D. E. Shaw & Co., Inc. | 28,376 | $212.5K | 0.00% | −6,226−18.0% | Reduced |
| ExodusPoint Capital Management, LP | 29,931 | $224.2K | 0.00% | +29,931 | New |
| Federated Hermes, Inc. | 30,000 | $224.7K | 0.00% | −1,000−3.2% | Reduced |
| Pathstone Holdings, LLC | 30,830 | $230.9K | 0.00% | 00.0% | Unchanged |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 31,592 | $236.6K | 0.00% | +10,560+50.2% | Added |
| Vanguard Group Inc | 35,291 | $264.3K | 0.00% | 00.0% | Unchanged |
| PharVision Advisers, LLC | 35,684 | $267.3K | 0.14% | +35,684 | New |
| Verition Fund Management LLC | 35,844 | $268.5K | 0.00% | −31,729−47.0% | Reduced |
| PDT Partners, LLC | 40,794 | $305.5K | 0.02% | 00.0% | Unchanged |
| UBS Asset Management Americas Inc | 43,261 | $324.0K | 0.00% | +43,261 | New |
| California State Teachers Retirement System | 48,217 | $361.1K | 0.00% | −1,437−2.9% | Reduced |
| Legal & General Group Plc | 56,620 | $424.1K | 0.00% | +13,246+30.5% | Added |
| Goldman Sachs Group Inc | 57,834 | $433.2K | 0.00% | +330+0.6% | Added |
| Toroso Investments, LLC | 58,296 | $436.6K | 0.00% | −3,091−5.0% | Reduced |
| HRT Financial LP | 58,354 | $437.0K | 0.00% | +11,309+24.0% | Added |
| Public Employees Retirement System of Ohio | 60,419 | $452.5K | 0.00% | +13,746+29.5% | Added |
| Engineers Gate Manager LP | 62,800 | $470.4K | 0.01% | −31,588−33.5% | Reduced |
| Jump Financial, LLC | 63,321 | $474.3K | 0.01% | +17,321+37.7% | Added |
| Palogic Value Management, L.P. | 67,423 | $505.0K | 0.22% | −50,000−42.6% | Reduced |
| Blair William & Co | 71,044 | $532.1K | 0.00% | −31,579−30.8% | Reduced |
| SEI Investments Co | 76,702 | $574.5K | 0.00% | +76,702 | New |
| Northern Trust Corp | 80,549 | $603.3K | 0.00% | +1,300+1.6% | Added |
| Swiss National Bank | 87,474 | $655.2K | 0.00% | 00.0% | Unchanged |
| Point72 Asset Management, L.P. | 89,149 | $667.7K | 0.00% | +392+0.4% | Added |
| Oppenheimer & Co Inc | 89,390 | $669.5K | 0.01% | −10,212−10.3% | Reduced |
| Trexquant Investment LP | 108,038 | $809.2K | 0.01% | −28,878−21.1% | Reduced |
| Numerai GP LLC | 117,949 | $883.4K | 0.11% | +117,949 | New |
| Ameriprise Financial Inc | 138,422 | $1.04M | 0.00% | −4,345−3.0% | Reduced |
| CDC Financial, Inc. | 141,723 | $1.06M | 0.98% | +141,723 | New |
| Group One Trading, L.P. | 147,063 | $1.10M | 0.03% | +105,894+257.2% | Added |
| Russell Investments Group, Ltd. | 148,339 | $1.11M | 0.00% | −3,296−2.2% | Reduced |
| Acadian Asset Management LLC | 158,411 | $1.18M | 0.00% | −19,137−10.8% | Reduced |
| Nano Cap New Millennium Growth Fund L P | 167,500 | $1.25M | 1.07% | +167,500 | New |
| Persistent Asset Partners Ltd | 180,000 | $1.35M | 0.65% | +180,000 | New |
| Jane Street Group, LLC | 186,208 | $1.39M | 0.00% | +34,086+22.4% | Added |
| Citadel Advisors LLC | 200,114 | $1.50M | 0.00% | −60,755−23.3% | Reduced |
| Lavelle Capital LP | 202,727 | $1.52M | 0.96% | +202,727 | New |
| ARK Investment Management LLCSuperinvestorARK Invest | 236,425 | $1.77M | 0.01% | +6,372+2.8% | Added |
| P.A.W. Capital Corp | 240,000 | $1.80M | 4.08% | 00.0% | Unchanged |
| Morgan Stanley | 256,660 | $1.92M | 0.00% | −42,868−14.3% | Reduced |
| Marshall Wace, LLP | 292,483 | $2.19M | 0.00% | +59,269+25.4% | Added |
| Millennium Management LLC | 357,807 | $2.68M | 0.00% | −153,114−30.0% | Reduced |
| Renaissance Technologies LLC | 361,473 | $2.71M | 0.00% | −2,500−0.7% | Reduced |
| State Street Corp | 370,001 | $2.77M | 0.00% | +51,942+16.3% | Added |
| Sphera Management Technology Funds Ltd | 480,000 | $3.60M | 1.88% | +17,122+3.7% | Added |
| Portolan Capital Management, LLC | 492,861 | $3.69M | 0.20% | −686,139−58.2% | Reduced |
| UBS Group AG | 536,549 | $4.02M | 0.00% | +223,562+71.4% | Added |
| Royce & Associates LP | 537,406 | $4.03M | 0.04% | +43,078+8.7% | Added |
| First Eagle Investment Management, LLC | 645,647 | $4.84M | 0.01% | +100,646+18.5% | Added |
| Herald Investment Management Ltd | 645,465 | $4.85M | 0.63% | +45,465+7.6% | Added |
| Alpha Family Trust | 658,935 | $4.94M | 2.25% | 00.0% | Unchanged |
| S Squared Technology, LLC | 775,161 | $5.81M | 2.25% | +88,489+12.9% | Added |
| Connor, Clark & Lunn Investment Management Ltd. | 799,222 | $5.99M | 0.02% | −145,330−15.4% | Reduced |
| New York State Common Retirement Fund | 852,915 | $6.39M | 0.01% | +3,170+0.4% | Added |
| CenterBook Partners LP | 960,996 | $7.20M | 0.35% | −219,970−18.6% | Reduced |
| BlackRock, Inc. | 976,514 | $7.31M | 0.00% | +31,250+3.3% | Added |
| Y.D. More Investments Ltd | 1,171,298 | $8.37M | 0.40% | −11,500−1.0% | Reduced |
| Nuveen, LLC | 1,520,398 | $11.4M | 0.00% | +37,457+2.5% | Added |
| Penn Capital Management Co Inc | 1,588,680 | $11.9M | 0.95% | −57,414−3.5% | Reduced |
| Ulysses Management LLC | 2,998,474 | $22.5M | 5.89% | 00.0% | Unchanged |
| Wellington Management Group LLP | 3,001,433 | $22.5M | 0.00% | +543,628+22.1% | Added |
| ION Crossover Partners Ltd | 3,030,826 | $22.7M | 29.29% | +3,030,826 | New |
| Migdal Insurance & Financial Holdings Ltd. | 3,106,157 | $23.3M | 0.20% | 00.0% | Unchanged |
| Menora Mivtachim Holdings Ltd. | 4,015,494 | $30.1M | 0.14% | +807,100+25.2% | Added |
| Phoenix Holdings Ltd. | 4,285,786 | $32.1M | 0.35% | +1,292,700+43.2% | Added |
| Viola Ventures V.C. Management 4 Ltd. | 10,810,778 | $81.0M | 90.22% | 00.0% | Unchanged |
| Naspers Ltd | 11,173,265 | $83.7M | 18.06% | 00.0% | Unchanged |