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 |
|---|---|---|---|---|---|
| Naspers Ltd | 11,173,265 | $83.7M | 18.06% | 00.0% | Unchanged |
| Viola Ventures V.C. Management 4 Ltd. | 10,810,778 | $81.0M | 90.22% | 00.0% | Unchanged |
| Phoenix Holdings Ltd. | 4,285,786 | $32.1M | 0.35% | +1,292,700+43.2% | Added |
| Menora Mivtachim Holdings Ltd. | 4,015,494 | $30.1M | 0.14% | +807,100+25.2% | Added |
| Migdal Insurance & Financial Holdings Ltd. | 3,106,157 | $23.3M | 0.20% | 00.0% | Unchanged |
| ION Crossover Partners Ltd | 3,030,826 | $22.7M | 29.29% | +3,030,826 | New |
| Wellington Management Group LLP | 3,001,433 | $22.5M | 0.00% | +543,628+22.1% | Added |
| Ulysses Management LLC | 2,998,474 | $22.5M | 5.89% | 00.0% | Unchanged |
| Penn Capital Management Co Inc | 1,588,680 | $11.9M | 0.95% | −57,414−3.5% | Reduced |
| Nuveen, LLC | 1,520,398 | $11.4M | 0.00% | +37,457+2.5% | Added |
| Y.D. More Investments Ltd | 1,171,298 | $8.37M | 0.40% | −11,500−1.0% | Reduced |
| BlackRock, Inc. | 976,514 | $7.31M | 0.00% | +31,250+3.3% | Added |
| CenterBook Partners LP | 960,996 | $7.20M | 0.35% | −219,970−18.6% | Reduced |
| New York State Common Retirement Fund | 852,915 | $6.39M | 0.01% | +3,170+0.4% | Added |
| Connor, Clark & Lunn Investment Management Ltd. | 799,222 | $5.99M | 0.02% | −145,330−15.4% | Reduced |
| S Squared Technology, LLC | 775,161 | $5.81M | 2.25% | +88,489+12.9% | Added |
| Alpha Family Trust | 658,935 | $4.94M | 2.25% | 00.0% | Unchanged |
| Herald Investment Management Ltd | 645,465 | $4.85M | 0.63% | +45,465+7.6% | Added |
| First Eagle Investment Management, LLC | 645,647 | $4.84M | 0.01% | +100,646+18.5% | Added |
| Royce & Associates LP | 537,406 | $4.03M | 0.04% | +43,078+8.7% | Added |
| UBS Group AG | 536,549 | $4.02M | 0.00% | +223,562+71.4% | Added |
| Portolan Capital Management, LLC | 492,861 | $3.69M | 0.20% | −686,139−58.2% | Reduced |
| Sphera Management Technology Funds Ltd | 480,000 | $3.60M | 1.88% | +17,122+3.7% | Added |
| State Street Corp | 370,001 | $2.77M | 0.00% | +51,942+16.3% | Added |
| Renaissance Technologies LLC | 361,473 | $2.71M | 0.00% | −2,500−0.7% | Reduced |
| Millennium Management LLC | 357,807 | $2.68M | 0.00% | −153,114−30.0% | Reduced |
| Marshall Wace, LLP | 292,483 | $2.19M | 0.00% | +59,269+25.4% | Added |
| Morgan Stanley | 256,660 | $1.92M | 0.00% | −42,868−14.3% | Reduced |
| P.A.W. Capital Corp | 240,000 | $1.80M | 4.08% | 00.0% | Unchanged |
| ARK Investment Management LLCSuperinvestorARK Invest | 236,425 | $1.77M | 0.01% | +6,372+2.8% | Added |
| Lavelle Capital LP | 202,727 | $1.52M | 0.96% | +202,727 | New |
| Citadel Advisors LLC | 200,114 | $1.50M | 0.00% | −60,755−23.3% | Reduced |
| Jane Street Group, LLC | 186,208 | $1.39M | 0.00% | +34,086+22.4% | Added |
| Persistent Asset Partners Ltd | 180,000 | $1.35M | 0.65% | +180,000 | New |
| Nano Cap New Millennium Growth Fund L P | 167,500 | $1.25M | 1.07% | +167,500 | New |
| Acadian Asset Management LLC | 158,411 | $1.18M | 0.00% | −19,137−10.8% | Reduced |
| Russell Investments Group, Ltd. | 148,339 | $1.11M | 0.00% | −3,296−2.2% | Reduced |
| Group One Trading, L.P. | 147,063 | $1.10M | 0.03% | +105,894+257.2% | Added |
| CDC Financial, Inc. | 141,723 | $1.06M | 0.98% | +141,723 | New |
| Ameriprise Financial Inc | 138,422 | $1.04M | 0.00% | −4,345−3.0% | Reduced |
| Numerai GP LLC | 117,949 | $883.4K | 0.11% | +117,949 | New |
| Trexquant Investment LP | 108,038 | $809.2K | 0.01% | −28,878−21.1% | Reduced |
| Oppenheimer & Co Inc | 89,390 | $669.5K | 0.01% | −10,212−10.3% | Reduced |
| Point72 Asset Management, L.P. | 89,149 | $667.7K | 0.00% | +392+0.4% | Added |
| Swiss National Bank | 87,474 | $655.2K | 0.00% | 00.0% | Unchanged |
| Northern Trust Corp | 80,549 | $603.3K | 0.00% | +1,300+1.6% | Added |
| SEI Investments Co | 76,702 | $574.5K | 0.00% | +76,702 | New |
| Blair William & Co | 71,044 | $532.1K | 0.00% | −31,579−30.8% | Reduced |
| Palogic Value Management, L.P. | 67,423 | $505.0K | 0.22% | −50,000−42.6% | Reduced |
| Jump Financial, LLC | 63,321 | $474.3K | 0.01% | +17,321+37.7% | Added |
| Engineers Gate Manager LP | 62,800 | $470.4K | 0.01% | −31,588−33.5% | Reduced |
| Public Employees Retirement System of Ohio | 60,419 | $452.5K | 0.00% | +13,746+29.5% | Added |
| HRT Financial LP | 58,354 | $437.0K | 0.00% | +11,309+24.0% | Added |
| Toroso Investments, LLC | 58,296 | $436.6K | 0.00% | −3,091−5.0% | Reduced |
| Goldman Sachs Group Inc | 57,834 | $433.2K | 0.00% | +330+0.6% | Added |
| Legal & General Group Plc | 56,620 | $424.1K | 0.00% | +13,246+30.5% | Added |
| California State Teachers Retirement System | 48,217 | $361.1K | 0.00% | −1,437−2.9% | Reduced |
| UBS Asset Management Americas Inc | 43,261 | $324.0K | 0.00% | +43,261 | New |
| PDT Partners, LLC | 40,794 | $305.5K | 0.02% | 00.0% | Unchanged |
| Verition Fund Management LLC | 35,844 | $268.5K | 0.00% | −31,729−47.0% | Reduced |
| PharVision Advisers, LLC | 35,684 | $267.3K | 0.14% | +35,684 | New |
| Vanguard Group Inc | 35,291 | $264.3K | 0.00% | 00.0% | Unchanged |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 31,592 | $236.6K | 0.00% | +10,560+50.2% | Added |
| Pathstone Holdings, LLC | 30,830 | $230.9K | 0.00% | 00.0% | Unchanged |
| Federated Hermes, Inc. | 30,000 | $224.7K | 0.00% | −1,000−3.2% | Reduced |
| ExodusPoint Capital Management, LP | 29,931 | $224.2K | 0.00% | +29,931 | New |
| D. E. Shaw & Co., Inc. | 28,376 | $212.5K | 0.00% | −6,226−18.0% | Reduced |
| JPMorgan Chase & Co | 20,249 | $151.7K | 0.00% | −1,276−5.9% | Reduced |
| Fox Run Management, L.L.C. | 19,528 | $146.3K | 0.02% | +19,528 | New |
| Simplex Trading, LLC | 18,997 | $142.3K | 0.00% | −66,225−77.7% | Reduced |
| Teacher Retirement System of Texas | 18,016 | $134.9K | 0.00% | +1,608+9.8% | Added |
| Geode Capital Management, LLC | 18,036 | $134.7K | 0.00% | +1,305+7.8% | Added |
| Qube Research & Technologies Ltd | 16,582 | $124.2K | 0.00% | +16,582 | New |
| Police & Firemen's Retirement System of New Jersey | 16,124 | $120.8K | 0.00% | 00.0% | Unchanged |
| Lazard Asset Management LLC | 13,736 | $102.9K | 0.00% | −6,025−30.5% | Reduced |
| Two Sigma Advisers, LP | 13,000 | $97.4K | 0.00% | −11,800−47.6% | Reduced |
| Boothbay Fund Management, LLC | 11,961 | $89.6K | 0.00% | +11,961 | New |
| Skopos Labs, Inc. | 11,732 | $85.2K | 0.00% | +11,732 | New |
| Quantbot Technologies LP | 11,347 | $85.0K | 0.00% | +11,347 | New |
| Bank of America Corp | 11,122 | $83.3K | 0.00% | −45,091−80.2% | Reduced |
| Meitav Dash Investments Ltd | 10,000 | $74.9K | 0.00% | 00.0% | Unchanged |
| KLP Kapitalforvaltning AS | 8,100 | $60.7K | 0.00% | 00.0% | Unchanged |
| Deutsche Bank AG | 5,667 | $42.4K | 0.00% | 00.0% | Unchanged |
| Quarry LP | 2,409 | $18.0K | 0.00% | +2,409 | New |
| Citigroup Inc | 1,334 | $9.99K | 0.00% | −972−42.2% | Reduced |
| PEAK6 LLC | 1,098 | $8.22K | 0.00% | −44,879−97.6% | Reduced |
| SBI Securities Co., Ltd. | 1,023 | $7.66K | 0.00% | 00.0% | Unchanged |
| Walleye Trading LLC | 871 | $6.52K | 0.00% | −8,057−90.2% | Reduced |
| Wells Fargo & Company | 800 | $5.99K | 0.00% | +266+49.8% | Added |
| Crewe Advisors LLC | 734 | $5.50K | 0.00% | 00.0% | Unchanged |
| Barclays PLC | 679 | $5.09K | 0.00% | +557+456.6% | Added |
| State of Wyoming | 544 | $4.08K | 0.00% | +544 | New |
| Royal Bank of Canada | 512 | $3.00K | 0.00% | −1,100−68.2% | Reduced |
| Advisor Group Holdings, Inc. | 383 | $2.87K | 0.00% | −260−40.4% | Reduced |
| BNP Paribas Arbitrage, SA | 220 | $1.65K | 0.00% | +1+0.5% | Added |
| GWM Advisors LLC | 109 | $816 | 0.00% | 00.0% | Unchanged |
| Jones Financial Companies LLLP | 100 | $749 | 0.00% | 00.0% | Unchanged |
| Smartleaf Asset Management LLC | 47 | $350 | 0.00% | +47 | New |
| Caitong International Asset Management Co., Ltd | 18 | $135 | 0.00% | +18 | New |
| FMR LLC | 6 | $45 | 0.00% | 00.0% | Unchanged |