SIMILARWEB LTD. - SMWB
Detailed investor-level table based on 13F positions.
Methodology:
Market value and % of portfolio use SEC reported VALUE ($000).
For PUT/CALL positions this reflects reported underlying exposure, not premium cash paid/received.
Details.
Rows: 0
| Investor | History | Status | Shares held | Market value ($000) | % of portfolio | Previous % | Rank | Change in shares | % change in shares | Source | Date reported |
|---|---|---|---|---|---|---|---|---|---|---|---|
| PharVision Advisers, LLC | History | Reduced | 18,927 | 49,400 | 0.5% | 0.14% | 1 | -16,757 | -46.96% | Q1 2026 | May 11, 2026 |
| NASPERS LTD | History | No change | 11,173,265 | 29,162 | 11.53% | 18.06% | 2 | 0 | 0.0% | Q1 2026 | May 13, 2026 |
| MENORA MIVTACHIM HOLDINGS LTD. | History | No change | 4,015,494 | 10,480 | 0.05% | 0.14% | 3 | 0 | 0.0% | Q1 2026 | May 14, 2026 |
| Y.D. More Investments Ltd | History | Reduced | 1,151,298 | 8,338 | 0.33% | 0.4% | 4 | -20,000 | -1.71% | Q1 2026 | May 04, 2026 |
| ION Crossover Partners Ltd | History | No change | 3,030,826 | 7,910 | 21.45% | 29.28% | 5 | 0 | 0.0% | Q1 2026 | May 20, 2026 |
| Ulysses Management LLC | History | No change | 2,998,474 | 7,826 | 0.98% | 4.13% | 6 | 0 | 0.0% | Q1 2026 | May 15, 2026 |
| WELLINGTON MANAGEMENT GROUP LLP | History | Reduced | 2,966,757 | 7,743 | 0.0% | 0.0% | 7 | -34,676 | -1.16% | Q1 2026 | May 15, 2026 |
| S SQUARED TECHNOLOGY, LLC | History | Added to | 1,600,000 | 4,176 | 1.58% | 2.25% | 8 | +824,839 | 106.41% | Q1 2026 | May 15, 2026 |
| CenterBook Partners LP | History | Added to | 1,325,113 | 3,458 | 0.19% | 0.35% | 9 | +364,117 | 37.89% | Q1 2026 | May 05, 2026 |
| Alpha Family Trust | History | No change | 658,935 | 2,260 | 1.1% | 2.25% | 10 | 0 | 0.0% | Q1 2026 | May 13, 2026 |
| MILLENNIUM MANAGEMENT LLC | History | Added to | 825,763 | 2,155 | 0.0% | 0.0% | 11 | +467,956 | 130.78% | Q1 2026 | May 15, 2026 |
| MIRABELLA FINANCIAL SERVICES LLP | History | New | 792,664 | 2,068 | 0.2% | — | 12 | +792,664 | New | Q1 2026 | May 12, 2026 |
| RENAISSANCE TECHNOLOGIES LLC | History | Added to | 739,673 | 1,930 | 0.0% | 0.0% | 13 | +378,200 | 104.63% | Q1 2026 | May 14, 2026 |
| HERALD INVESTMENT MANAGEMENT Ltd | History | No change | 645,465 | 1,678 | 0.23% | 0.63% | 14 | 0 | 0.0% | Q1 2026 | May 13, 2026 |
| CDC Financial, Inc. | History | Added to | 639,014 | 1,667 | 1.06% | 0.5% | 15 | +497,291 | 350.89% | Q1 2026 | May 15, 2026 |
| MARSHALL WACE, LLP | History | Added to | 638,188 | 1,665 | 0.0% | 0.0% | 16 | +345,705 | 118.2% | Q1 2026 | May 14, 2026 |
| Sphera Management Technology Funds Ltd | History | Added to | 615,000 | 1,605 | 0.9% | 1.23% | 17 | +135,000 | 28.13% | Q1 2026 | May 15, 2026 |
| CITADEL ADVISORS LLC | History | Added to | 600,105 | 1,566 | 0.0% | 0.0% | 18 | +114,091 | 23.47% | Q1 2026 | May 15, 2026 |
| MORGAN STANLEY | History | Added to | 591,863 | 1,544 | 0.0% | 0.0% | 19 | +335,203 | 130.6% | Q1 2026 | May 15, 2026 |
| Connor, Clark & Lunn Investment Management Ltd. | History | Reduced | 533,634 | 1,392 | 0.0% | 0.02% | 20 | -265,588 | -33.23% | Q1 2026 | May 11, 2026 |
| P.A.W. CAPITAL CORP | History | Added to | 500,000 | 1,305 | 3.55% | 3.91% | 21 | +260,000 | 108.33% | Q1 2026 | Apr 21, 2026 |
| Qube Research & Technologies Ltd | History | Added to | 416,146 | 1,086 | 0.0% | 0.0% | 22 | +399,564 | 2409.62% | Q1 2026 | May 15, 2026 |
| ACADIAN ASSET MANAGEMENT LLC | History | Added to | 405,607 | 1,050 | 0.0% | 0.0% | 23 | +247,196 | 156.05% | Q1 2026 | May 13, 2026 |
| NANO CAP NEW MILLENNIUM GROWTH FUND L P | History | Added to | 390,000 | 1,017 | 0.95% | 1.07% | 24 | +222,500 | 132.84% | Q1 2026 | May 15, 2026 |
| PEAK6 LLC | History | Added to | 381,756 | 996 | 0.0% | 0.0% | 25 | +308,158 | 418.7% | Q1 2026 | May 13, 2026 |
| Penn Capital Management Company, LLC | History | Reduced | 360,366 | 940 | 0.07% | 0.95% | 26 | -1,228,314 | -77.32% | Q1 2026 | May 06, 2026 |
| ARK Investment Management LLC | History | Added to | 352,070 | 918 | 0.01% | 0.01% | 27 | +115,645 | 48.91% | Q1 2026 | May 12, 2026 |
| Schonfeld Strategic Advisors LLC | History | New | 289,174 | 754 | 0.01% | — | 28 | +289,174 | New | Q1 2026 | May 15, 2026 |
| JANE STREET GROUP, LLC | History | Reduced | 231,266 | 603 | 0.0% | 0.0% | 29 | -88,742 | -27.73% | Q1 2026 | May 12, 2026 |
| XTX Topco Ltd | History | New | 228,880 | 597 | 0.01% | — | 30 | +228,880 | New | Q1 2026 | May 15, 2026 |
| Militia Capital Management LLC | History | New | 219,264 | 572 | 0.13% | — | 31 | +219,264 | New | Q1 2026 | May 13, 2026 |
| Phoenix Financial Ltd. | History | Reduced | 216,904 | 566 | 0.01% | 0.35% | 32 | -4,068,882 | -94.94% | Q1 2026 | May 11, 2026 |
| UBS Group AG | History | Reduced | 198,543 | 518 | 0.0% | 0.0% | 33 | -338,006 | -63.0% | Q1 2026 | May 05, 2026 |
| Persistent Asset Partners Ltd | History | No change | 180,000 | 469 | 0.17% | 0.61% | 34 | 0 | 0.0% | Q1 2026 | May 12, 2026 |
| JPMORGAN CHASE & CO | History | Added to | 175,207 | 434 | 0.0% | 0.0% | 35 | +154,958 | 765.26% | Q1 2026 | May 13, 2026 |
| GSA CAPITAL PARTNERS LLP | History | New | 152,105 | 397 | 0.02% | — | 36 | +152,105 | New | Q1 2026 | May 08, 2026 |
| Jump Financial, LLC | History | Added to | 147,616 | 385 | 0.01% | 0.01% | 37 | +84,295 | 133.12% | Q1 2026 | May 14, 2026 |
| BlackRock, Inc. | History | Reduced | 127,504 | 332 | 0.0% | 0.0% | 38 | -849,010 | -86.94% | Q1 2026 | May 13, 2026 |
| SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC | History | New | 125,623 | 327 | 0.01% | — | 39 | +125,623 | New | Q1 2026 | May 15, 2026 |
| Palogic Value Management, L.P. | History | New | 114,000 | 297 | 0.13% | — | 40 | +114,000 | New | Q1 2026 | May 15, 2026 |
| CITIGROUP INC | History | Added to | 110,174 | 287 | 0.0% | 0.0% | 41 | +108,840 | 8158.92% | Q1 2026 | May 11, 2026 |
| STATE STREET CORP | History | Reduced | 109,396 | 285 | 0.0% | 0.0% | 42 | -260,605 | -70.43% | Q1 2026 | May 15, 2026 |
| VANGUARD GROUP INC | History | No change | 35,291 | 264 | 0.0% | 0.0% | 43 | 0 | 0.0% | Q4 2025 | Jan 29, 2026 |
| Point72 Asset Management, L.P. | History | Added to | 100,204 | 261 | 0.0% | 0.0% | 44 | +11,055 | 12.4% | Q1 2026 | May 15, 2026 |
| Quadrature Capital Ltd | History | New | 94,234 | 245 | 0.0% | — | 45 | +94,234 | New | Q1 2026 | May 15, 2026 |
| OPPENHEIMER & CO INC | History | Added to | 91,088 | 237 | 0.0% | 0.01% | 46 | +1,698 | 1.9% | Q1 2026 | Apr 23, 2026 |
| Voleon Capital Management LP | History | New | 88,704 | 231 | 0.0% | — | 47 | +88,704 | New | Q1 2026 | May 15, 2026 |
| Engineers Gate Manager LP | History | Added to | 87,418 | 228 | 0.0% | 0.01% | 48 | +24,618 | 39.2% | Q1 2026 | May 15, 2026 |
| TWO SIGMA INVESTMENTS, LP | History | New | 79,076 | 206 | 0.0% | — | 49 | +79,076 | New | Q1 2026 | May 15, 2026 |
| FEDERATED HERMES, INC. | History | Added to | 70,000 | 182 | 0.0% | 0.0% | 50 | +40,000 | 133.33% | Q1 2026 | May 11, 2026 |
| BANK OF AMERICA CORP /DE/ | History | Added to | 63,985 | 167 | 0.0% | 0.0% | 51 | +52,863 | 475.3% | Q1 2026 | May 15, 2026 |
| Tidal Investments LLC | History | Added to | 61,626 | 160 | 0.0% | 0.0% | 52 | +3,330 | 5.71% | Q1 2026 | May 15, 2026 |
| Centiva Capital, LP | History | New | 60,122 | 156 | 0.0% | — | 53 | +60,122 | New | Q1 2026 | May 14, 2026 |
| D. E. Shaw & Co., Inc. | History | Added to | 58,552 | 152 | 0.0% | 0.0% | 54 | +30,176 | 106.34% | Q1 2026 | May 15, 2026 |
| AXQ CAPITAL, LP | History | New | 52,410 | 136 | 0.02% | — | 55 | +52,410 | New | Q1 2026 | May 13, 2026 |
| Pathstone Holdings, LLC | History | Added to | 50,390 | 131 | 0.0% | 0.0% | 56 | +19,560 | 63.44% | Q1 2026 | May 11, 2026 |
| Russell Investments Group, Ltd. | History | Reduced | 52,019 | 129 | 0.0% | 0.0% | 57 | -96,320 | -64.93% | Q1 2026 | May 08, 2026 |
| GOLDMAN SACHS GROUP INC | History | Reduced | 42,643 | 111 | 0.0% | 0.0% | 58 | -15,191 | -26.27% | Q1 2026 | May 15, 2026 |
| TWO SIGMA ADVISERS, LP | History | No change | 13,000 | 97 | 0.0% | 0.0% | 59 | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| Graham Capital Management, L.P. | History | New | 36,634 | 95 | 0.0% | — | 60 | +36,634 | New | Q1 2026 | May 15, 2026 |
| HRT FINANCIAL LP | History | Reduced | 22,670 | 59 | 0.0% | 0.0% | 61 | -35,684 | -61.15% | Q1 2026 | May 14, 2026 |
| Virtu Financial LLC | History | New | 20,111 | 52 | 0.0% | — | 62 | +20,111 | New | Q1 2026 | May 14, 2026 |
| NEW YORK STATE COMMON RETIREMENT FUND | History | Reduced | 18,774 | 49 | 0.0% | 0.01% | 63 | -834,141 | -97.8% | Q1 2026 | May 06, 2026 |
| Aquatic Capital Management LLC | History | New | 18,008 | 47 | 0.0% | — | 64 | +18,008 | New | Q1 2026 | May 15, 2026 |
| Squarepoint Ops LLC | History | New | 13,020 | 33 | 0.0% | — | 65 | +13,020 | New | Q1 2026 | May 15, 2026 |
| LAZARD ASSET MANAGEMENT LLC | History | Reduced | 11,228 | 29 | 0.0% | 0.0% | 66 | -2,508 | -18.26% | Q1 2026 | May 15, 2026 |
| BARCLAYS PLC | History | Added to | 10,611 | 27 | 0.0% | 0.0% | 67 | +9,932 | 1462.74% | Q1 2026 | May 14, 2026 |
| Cresset Asset Management, LLC | History | New | 10,144 | 26 | 0.0% | — | 69 | +10,144 | New | Q1 2026 | May 15, 2026 |
| MEITAV INVESTMENT HOUSE LTD | History | No change | 10,000 | 26 | 0.0% | 0.0% | 68 | 0 | 0.0% | Q1 2026 | Apr 29, 2026 |
| WELLS FARGO & COMPANY/MN | History | Added to | 8,200 | 21 | 0.0% | 0.0% | 70 | +7,400 | 925.0% | Q1 2026 | May 11, 2026 |
| SIMPLEX TRADING, LLC | History | Reduced | 2,904 | 7 | 0.0% | 0.0% | 71 | -16,093 | -84.71% | Q1 2026 | May 14, 2026 |
| BNP PARIBAS FINANCIAL MARKETS | History | Added to | 890 | 2 | 0.0% | 0.0% | 72 | +670 | 304.55% | Q1 2026 | May 12, 2026 |
| SBI Securities Co., Ltd. | History | Added to | 1,024 | 2 | 0.0% | 0.0% | 73 | +1 | 0.1% | Q1 2026 | Apr 27, 2026 |
| ROYAL BANK OF CANADA | History | Reduced | 200 | 1 | 0.0% | 0.0% | 74 | -312 | -60.94% | Q1 2026 | May 15, 2026 |
| Migdal Insurance & Financial Holdings Ltd. | History | Closed out | 0 | 0 | — | 0.2% | — | -3,106,157 | -100.0% | Q1 2026 | May 14, 2026 |
| Nuveen, LLC | History | Closed out | 0 | 0 | — | 0.0% | — | -1,520,398 | -100.0% | Q1 2026 | Apr 30, 2026 |
| First Eagle Investment Management, LLC | History | Closed out | 0 | 0 | — | 0.01% | — | -645,647 | -100.0% | Q1 2026 | May 14, 2026 |
| ROYCE & ASSOCIATES LP | History | Closed out | 0 | 0 | — | 0.04% | — | -537,406 | -100.0% | Q1 2026 | May 12, 2026 |
| Portolan Capital Management, LLC | History | Closed out | 0 | 0 | — | 0.2% | — | -492,861 | -100.0% | Q1 2026 | May 15, 2026 |
| GROUP ONE TRADING LLC | History | Closed out | 0 | 0 | — | 0.0% | — | -147,063 | -100.0% | Q1 2026 | May 13, 2026 |
| AMERIPRISE FINANCIAL INC | History | Closed out | 0 | 0 | — | 0.0% | — | -138,422 | -100.0% | Q1 2026 | May 15, 2026 |
| Numerai GP LLC | History | Closed out | 0 | 0 | — | 0.11% | — | -117,949 | -100.0% | Q1 2026 | May 15, 2026 |
| Trexquant Investment LP | History | Closed out | 0 | 0 | — | 0.01% | — | -108,038 | -100.0% | Q1 2026 | May 15, 2026 |
| Swiss National Bank | History | Closed out | 0 | 0 | — | 0.0% | — | -87,474 | -100.0% | Q1 2026 | May 07, 2026 |
| NORTHERN TRUST CORP | History | Closed out | 0 | 0 | — | 0.0% | — | -80,549 | -100.0% | Q1 2026 | May 14, 2026 |
| SEI INVESTMENTS CO | History | Closed out | 0 | 0 | — | 0.0% | — | -76,702 | -100.0% | Q1 2026 | May 13, 2026 |
| BLAIR WILLIAM & CO/IL | History | Closed out | 0 | 0 | — | 0.0% | — | -71,044 | -100.0% | Q1 2026 | May 08, 2026 |
| PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO | History | Closed out | 0 | 0 | — | 0.0% | — | -60,419 | -100.0% | Q1 2026 | May 14, 2026 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | History | Closed out | 0 | 0 | — | 0.0% | — | -60,200 | -100.0% | Q1 2026 | May 15, 2026 |
| Legal & General Group Plc | History | Closed out | 0 | 0 | — | 0.0% | — | -56,620 | -100.0% | Q1 2026 | May 08, 2026 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM | History | Closed out | 0 | 0 | — | 0.0% | — | -48,217 | -100.0% | Q1 2026 | May 15, 2026 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | History | Closed out | 0 | 0 | — | 0.0% | — | -43,261 | -100.0% | Q1 2026 | May 13, 2026 |
| PDT Partners, LLC | History | Closed out | 0 | 0 | — | 0.02% | — | -40,794 | -100.0% | Q1 2026 | May 15, 2026 |
| Verition Fund Management LLC | History | Closed out | 0 | 0 | — | 0.0% | — | -35,844 | -100.0% | Q1 2026 | May 15, 2026 |
| Zurcher Kantonalbank (Zurich Cantonalbank) | History | Closed out | 0 | 0 | — | 0.0% | — | -31,592 | -100.0% | Q1 2026 | May 15, 2026 |
| ExodusPoint Capital Management, LP | History | Closed out | 0 | 0 | — | 0.0% | — | -29,931 | -100.0% | Q1 2026 | May 14, 2026 |
| FOX RUN MANAGEMENT, L.L.C. | History | Closed out | 0 | 0 | — | 0.02% | — | -19,528 | -100.0% | Q1 2026 | May 12, 2026 |
| GEODE CAPITAL MANAGEMENT, LLC | History | Closed out | 0 | 0 | — | 0.0% | — | -18,036 | -100.0% | Q1 2026 | May 15, 2026 |
| TEACHER RETIREMENT SYSTEM OF TEXAS | History | Closed out | 0 | 0 | — | 0.0% | — | -18,016 | -100.0% | Q1 2026 | Apr 30, 2026 |
| Police & Firemen's Retirement System of New Jersey | History | Closed out | 0 | 0 | — | 0.0% | — | -16,124 | -100.0% | Q1 2026 | Apr 29, 2026 |
| Walleye Trading LLC | History | Closed out | 0 | 0 | — | 0.0% | — | -13,171 | -100.0% | Q1 2026 | May 08, 2026 |
| BOOTHBAY FUND MANAGEMENT, LLC | History | Closed out | 0 | 0 | — | 0.0% | — | -11,961 | -100.0% | Q1 2026 | May 15, 2026 |
| Brooklyn Investment Group | History | Closed out | 0 | 0 | — | 0.0% | — | -11,732 | -100.0% | Q1 2026 | Apr 29, 2026 |
| Quantbot Technologies LP | History | Closed out | 0 | 0 | — | 0.0% | — | -11,347 | -100.0% | Q1 2026 | May 13, 2026 |
| KLP KAPITALFORVALTNING AS | History | Closed out | 0 | 0 | — | 0.0% | — | -8,100 | -100.0% | Q1 2026 | Apr 29, 2026 |
| DEUTSCHE BANK AG\ | History | Closed out | 0 | 0 | — | 0.0% | — | -5,667 | -100.0% | Q1 2026 | May 06, 2026 |
| Quarry LP | History | Closed out | 0 | 0 | — | 0.0% | — | -2,409 | -100.0% | Q1 2026 | May 15, 2026 |
| Crewe Advisors LLC | History | Closed out | 0 | 0 | — | 0.0% | — | -734 | -100.0% | Q1 2026 | May 07, 2026 |
| State of Wyoming | History | Closed out | 0 | 0 | — | 0.0% | — | -544 | -100.0% | Q1 2026 | May 13, 2026 |
| Caitong International Asset Management Co., Ltd | History | Added to | 242 | 0 | — | — | — | +206 | 572.22% | Q1 2026 | May 11, 2026 |
| NewEdge Advisors, LLC | History | Closed out | 0 | 0 | — | — | — | -109 | -100.0% | Q1 2026 | May 15, 2026 |
| OSAIC HOLDINGS, INC. | History | Reduced | 300 | 0 | — | 0.0% | — | -83 | -21.67% | Q1 2026 | May 15, 2026 |
| ASSETMARK, INC | History | New | 48 | 0 | — | — | — | +48 | New | Q1 2026 | May 06, 2026 |
| Smartleaf Asset Management LLC | History | Reduced | 29 | 0 | — | — | — | -18 | -38.3% | Q1 2026 | May 15, 2026 |
| NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO | History | New | 12 | 0 | — | — | — | +12 | New | Q1 2026 | May 07, 2026 |
| FMR LLC | History | No change | 6 | 0 | — | — | — | 0 | 0.0% | Q1 2026 | May 15, 2026 |
| JONES FINANCIAL COMPANIES LLLP | History | No change | 100 | 0 | — | — | — | 0 | 0.0% | Q1 2026 | May 15, 2026 |