SIMILARWEB LTD (SMWB) Institutional Ownership Changes & 13F Activity

SIMILARWEB LTD (SMWB). Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings (Q2 2026). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions in the latest reporting period. Notable filers include Schonfeld Strategic Advisors Llc, Millennium Management Llc, Wellington Management Group Llp, Marshall Wace, Llp, and Lotus Technology Management, Lp.

InstitutionTypeChange in sharesChange Position %SharesReported stock balancePortfolio quarterFiling date
Integrated Wealth Concepts LlcBuy+15,00015,000$91.95KQ2 2026Sep 09, 2026
Citadel Advisors LlcSell-129,270-27.2%346,735$2.13MQ2 2026Sep 02, 2026
Schonfeld Strategic Advisors LlcBuy+921,455+318.7%1,210,629$7.42MQ2 2026Aug 14, 2026
Millennium Management LlcSell-807,565-97.8%18,198$111.55KQ2 2026Aug 14, 2026
Wellington Management Group LlpBuy+657,928+22.2%3,624,685$22.22MQ2 2026Aug 14, 2026
Lotus Technology Management, LpBuy+531,409531,409$3.40MQ2 2026Aug 14, 2026
ARK InvestBuy+482,593+137.1%834,663$5.12MQ2 2026Aug 14, 2026
Qube Research & Technologies LtdSell-384,299-92.3%31,847$195.22KQ2 2026Aug 14, 2026
Jane Street Group, LlcBuy+282,011+121.9%513,277$3.15MQ2 2026Aug 14, 2026
Nano Cap New Millennium Growth Fund L PBuy+260,000+66.7%650,000$3.98MQ2 2026Aug 14, 2026
Xtx Topco LtdSell-217,974-95.2%10,906$66.85KQ2 2026Aug 14, 2026
Susquehanna International Group, LlpBuy+138,417138,417$848.50KQ2 2026Aug 14, 2026
D. E. Shaw & Co., Inc.Buy+101,383+173.2%159,935$980.40KQ2 2026Aug 14, 2026
S Squared Technology, LlcBuy+90,000+5.6%1,690,000$10.36MQ2 2026Aug 14, 2026
Ulysses Management LlcSell-70,000-2.3%2,928,474$17.95MQ2 2026Aug 14, 2026
Two Sigma Investments, LpBuy+50,775+64.2%129,851$795.99KQ2 2026Aug 14, 2026
Susquehanna Fundamental Investments, LlcBuy+44,262+35.2%169,885$1.04MQ2 2026Aug 14, 2026
Cdc Financial, Inc.Buy+35,219+5.5%674,233$4.13MQ2 2026Aug 14, 2026
Lazard Asset Management LlcBuy+12,338+109.9%23,566$144.46KQ2 2026Aug 14, 2026
Prelude Capital Management, LlcBuy+10,41110,411$63.82KQ2 2026Aug 14, 2026
Barclays PlcSell-9,921-93.5%690$4.23KQ2 2026Aug 14, 2026
Royal Bank Of CanadaBuy+5,700+2850.0%5,900$36.00KQ2 2026Aug 14, 2026
Wells Fargo & Company/MnBuy+1,000+12.2%9,200$56.40KQ2 2026Aug 14, 2026
Quarry LpBuy+149149$913.00Q2 2026Aug 14, 2026
Marshall Wace, LlpSell-577,207-90.4%60,981$373.81KQ2 2026Aug 13, 2026
Acadian Asset Management LlcSell-398,857-98.3%6,750$41.00KQ2 2026Aug 13, 2026
Morgan StanleySell-323,660-54.7%268,203$1.64MQ2 2026Aug 13, 2026
Ubs Group AgBuy+204,785+103.1%403,328$2.47MQ2 2026Aug 13, 2026
Peak6 LlcBuy+163,666+51.0%484,822$2.97MQ2 2026Aug 13, 2026
Myda Advisors LlcBuy+100,000100,000$613.00KQ2 2026Aug 13, 2026
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Frequently asked questions about SMWB activity

  • Which institutional owners are buying SMWB?

    Institutional owners buying SMWB include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.

  • What does "buy" mean in SMWB activity?

    "Buy" means an investor increased their reported position in SMWB compared to the prior reporting period. This reflects growing exposure to SIMILARWEB LTD (SMWB) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in SMWB increasing?

    Institutional interest in SMWB can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.