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SMWB

Similarweb Ltd.
$6.18 -0.41 (-6.22%) At close · Jul 2
Market Cap
$541.37M
Shares
86,962,202

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 81
Total Value: $110,748,559
Total Shares: 42,432,412

Institutional Ownership Trend

20 quarters

Holder Concentration

Across 81 13F filers · Δ vs Dec 31, 2025
Top Holder
26.3%
Jun 2023 → Mar 2026 · range 22.2% – 40.9%
+4.1 pts
Top 5
57.0%
Jun 2023 → Mar 2026 · range 46.3% – 80.8%
+6.1 pts
Top 10
70.4%
Jun 2023 → Mar 2026 · range 61.8% – 95.1%
−0.8 pts
HHI
1,001
Jun 2023 → Mar 2026 · range 803 – 2,136
Broadly held+174

Quarterly Activity

vs Dec 31, 2025
New
19
Increased
31
Decreased
19
Sold Out
38
Unchanged
12
Holder count: -19
Institutional value: -70.6%
Shares held: -15.8%

Top Buyers

vs Dec 31, 2025
Institution Added Now Holds Open
Small S SQUARED TECHNOLOGY, LLC +824,839 1,600,000
Small CDC Financial, Inc. +497,291 639,014
Mega MILLENNIUM MANAGEMENT LLC +467,956 825,763
Large Qube Research & Technologies Ltd +399,564 416,146
Large RENAISSANCE TECHNOLOGIES LLC +378,200 739,673

Top Sellers

vs Dec 31, 2025
Institution Sold Now Holds Open
Mid Phoenix Financial Ltd. −4,068,882 216,904
Mid Penn Capital Management Company, LLC −1,228,314 360,366
Mega BlackRock, Inc. −849,010 127,504
Large NEW YORK STATE COMMON RETIREMENT FUND −834,141 18,774
Mega UBS Group AG −338,006 198,543

Top New Positions

vs Dec 31, 2025
Institution Acquired Value (USD) Open
Small MIRABELLA FINANCIAL SERVICES LLP 792,664 $2,068,853
Large Schonfeld Strategic Advisors LLC 289,174 $754,744
Mid XTX Topco Ltd 228,880 $597,376
Small Militia Capital Management LLC 219,264 $572,279
Mid GSA CAPITAL PARTNERS LLP 152,105 $396,994

Top Sold-Out Positions

vs Dec 31, 2025
Institution Previously Held Last Value (USD) Open
Mid Migdal Insurance & Financial Holdings Ltd. 3,106,157 $23,265,115
Mega Nuveen, LLC 1,520,398 $11,387,780
Large First Eagle Investment Management, LLC 645,647 $4,835,896
Mid ROYCE & ASSOCIATES LP 537,406 $4,025,170
Mid Portolan Capital Management, LLC 492,861 $3,691,528
Filter: New 19 Increased 31 Reduced 19 Sold out 38 Unchanged 12
Showing 83 of 83
All Common Calls Puts
Export CSV
Holder Value (USD) % of 13F Shares Open
Small NASPERS LTD $29,162,221 26.33% 11,173,265
Large MENORA MIVTACHIM HOLDINGS LTD. $10,480,439 9.46% 4,015,494
Micro ION Crossover Partners Ltd $7,910,455 7.14% 3,030,826
Small Ulysses Management LLC $7,826,017 7.07% 2,998,474
Mega WELLINGTON MANAGEMENT GROUP LLP $7,743,235 6.99% 2,966,757
Small S SQUARED TECHNOLOGY, LLC $4,176,000 3.77% 1,600,000
Mid CenterBook Partners LP $3,458,544 3.12% 1,325,113
Mid Y.D. More Investments Ltd $3,004,887 2.71% 1,151,298
Mega MILLENNIUM MANAGEMENT LLC $2,155,241 1.95% 825,763
Small MIRABELLA FINANCIAL SERVICES LLP $2,068,853 1.87% 792,664
Large RENAISSANCE TECHNOLOGIES LLC $1,930,546 1.74% 739,673
Small Alpha Family Trust $1,719,820 1.55% 658,935
Small HERALD INVESTMENT MANAGEMENT Ltd $1,684,663 1.52% 645,465
Small CDC Financial, Inc. $1,667,826 1.51% 639,014
Large MARSHALL WACE, LLP $1,665,670 1.50% 638,188
Small Sphera Management Technology Funds Ltd $1,605,150 1.45% 615,000
Mega MORGAN STANLEY $1,544,762 1.39% 591,863
Large Connor, Clark & Lunn Investment Management Ltd. $1,392,784 1.26% 533,634
Micro P.A.W. CAPITAL CORP $1,305,000 1.18% 500,000
Mega CITADEL ADVISORS LLC $1,242,373 1.12% 476,005
Large Qube Research & Technologies Ltd $1,086,141 0.98% 416,146
Large ACADIAN ASSET MANAGEMENT LLC $1,058,634 0.96% 405,607
Micro NANO CAP NEW MILLENNIUM GROWTH FUND L P $1,017,900 0.92% 390,000
Mid Penn Capital Management Company, LLC $940,555 0.85% 360,366
Large ARK Investment Management LLC $918,902 0.83% 352,070
Large PEAK6 LLC $838,217 0.76% 321,156
Large Schonfeld Strategic Advisors LLC $754,744 0.68% 289,174
Mega JANE STREET GROUP, LLC $603,604 0.55% 231,266
Mid XTX Topco Ltd $597,376 0.54% 228,880
Small Militia Capital Management LLC $572,279 0.52% 219,264
Mid Phoenix Financial Ltd. $566,119 0.51% 216,904
Small LAVELLE CAPITAL LP $529,117 0.48% 202,727
Mega UBS Group AG $518,196 0.47% 198,543
Small Persistent Asset Partners Ltd $469,800 0.42% 180,000
Mega JPMORGAN CHASE & CO $457,289 0.41% 175,207
Mid GSA CAPITAL PARTNERS LLP $396,994 0.36% 152,105
Mid Jump Financial, LLC $385,277 0.35% 147,616
Mega BlackRock, Inc. $332,785 0.30% 127,504
Mid SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC $327,876 0.30% 125,623
Mega CITADEL ADVISORS LLC $323,901 0.29% 124,100
Small Palogic Value Management, L.P. $297,540 0.27% 114,000
Mega CITIGROUP INC $287,554 0.26% 110,174
Mega STATE STREET CORP $285,523 0.26% 109,396
Large Point72 Asset Management, L.P. $261,532 0.24% 100,204
Mid Quadrature Capital Ltd $245,950 0.22% 94,234
Mid OPPENHEIMER & CO INC $237,739 0.21% 91,088
Mid Voleon Capital Management LP $231,517 0.21% 88,704
Mid Engineers Gate Manager LP $228,160 0.21% 87,418
Mega TWO SIGMA INVESTMENTS, LP $206,388 0.19% 79,076
Large FEDERATED HERMES, INC. $182,700 0.16% 70,000
Mega BANK OF AMERICA CORP /DE/ Bank $167,000 0.15% 63,985
Large Tidal Investments LLC $160,843 0.15% 61,626
Large PEAK6 LLC $158,166 0.14% 60,600
Large Centiva Capital, LP $156,918 0.14% 60,122
Mega D. E. Shaw & Co., Inc. $152,819 0.14% 58,552
Small AXQ CAPITAL, LP $136,790 0.12% 52,410
Large Russell Investments Group, Ltd. $135,769 0.12% 52,019
Large Pathstone Holdings, LLC $131,517 0.12% 50,390
Mega GOLDMAN SACHS GROUP INC $111,298 0.10% 42,643
Mid Graham Capital Management, L.P. $95,614 0.09% 36,634
Large HRT FINANCIAL LP $59,168 0.05% 22,670
Mid Virtu Financial LLC $52,489 0.05% 20,111
Micro PharVision Advisers, LLC $49,399 0.04% 18,927
Large NEW YORK STATE COMMON RETIREMENT FUND Pension $49,000 0.04% 18,774
Mid Aquatic Capital Management LLC $47,000 0.04% 18,008
Large Squarepoint Ops LLC $33,982 0.03% 13,020
Large LAZARD ASSET MANAGEMENT LLC $29,305 0.03% 11,228
Mega BARCLAYS PLC $27,694 0.03% 10,611
Large Cresset Asset Management, LLC $26,475 0.02% 10,144
Mid MEITAV INVESTMENT HOUSE LTD $26,100 0.02% 10,000
Mega WELLS FARGO & COMPANY/MN $21,402 0.02% 8,200
Mid SIMPLEX TRADING, LLC $7,579 0.01% 2,904
Mid SBI Securities Co., Ltd. Broker-Dealer $2,672 0.00% 1,024
Mega BNP PARIBAS ARBITRAGE, SA $2,322 0.00% 890
Large OSAIC HOLDINGS, INC. $783 0.00% 300
Small Caitong International Asset Management Co., Ltd $631 0.00% 242
Mega ROYAL BANK OF CANADA Bank $522 0.00% 200
Large JONES FINANCIAL COMPANIES LLLP $261 0.00% 100
Large ASSETMARK, INC $125 0.00% 48
Mid Smartleaf Asset Management LLC $75 0.00% 29
Large NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO $31 0.00% 12
Mega FMR LLC $15 0.00% 6
Small Covestor Ltd $0 0.00% 0
Key facts CIK 1842731 CUSIP M84137104 Visit website Investor relations

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