SIMILARWEB LTD. - SMWB

Detailed investor-level table based on 13F positions.

Shareholders (13F)

Quarter: Q1 2026 · Compare: Q4 2025
13D/13G major owners: Ownership tab.
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