ISHARES RUSSELL 1000 ETF (IWB) Institutional Ownership Changes & 13F Activity

ISHARES RUSSELL 1000 ETF (IWB) institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC 13F filings (Q1 2026). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions among tracked filers. Notable filers include Sequoia Financial Advisors, ARK Invest, Matrix Advisors Value Fund, Renaissance Technologies LLC, and Matrix Private Capital Group.

Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q1 2026Sequoia Financial AdvisorsSell-4,59274,728$26,645,142
Q1 2026ARK InvestSell-380$125
Q1 2026Matrix Advisors Value FundBuy1698$248,781
Q4 2025Renaissance Technologies LLCBuy22,22038,920$14,534,285
Q4 2025Sequoia Financial AdvisorsSell-74379,320$29,621,340
Q4 2025Matrix Advisors Value FundSell-54697$260,377
Q4 2025ARK InvestBuy3838$14,079
Q3 2025Renaissance Technologies LLCBuy6,00016,700$6,103,516
Q3 2025Sequoia Financial AdvisorsBuy3980,063$29,261,485
Q3 2025Matrix Advisors Value FundBuy29751$274,681
Q2 2025Renaissance Technologies LLCSell-29,80010,700$3,633,399
Q2 2025Sequoia Financial AdvisorsBuy1,70580,024$27,173,837
Q2 2025ARK InvestSell-130$98
Q1 2025Sequoia Financial AdvisorsSell-37178,319$24,023,433
Q1 2025ARK InvestBuy213$3,868
Q4 2024Renaissance Technologies LLCBuy19,60040,500$13,047,480
Q4 2024Sequoia Financial AdvisorsSell-1,89078,690$25,350,878
Q4 2024ARK InvestSell-2311$3,438
Q4 2024Matrix Advisors Value FundBuy1722$232,526
Q3 2024Sequoia Financial AdvisorsBuy1,78680,580$25,333,312
Q2 2024Renaissance Technologies LLCBuy3,30020,900$6,218,586
Q2 2024Sequoia Financial AdvisorsBuy2,33178,794$23,444,155
Q2 2024ARK InvestBuy3434$10,056
Q1 2024Matrix Advisors Value FundSell-4,121721$207,642
Q1 2024Sequoia Financial AdvisorsSell-2,30976,463$22,023,488
Q4 2023Sequoia Financial AdvisorsBuy12,19178,772$20,658,798
Q4 2023Renaissance Technologies LLCBuy10,80017,600$4,616
Q3 2023Sequoia Financial AdvisorsSell-3,53866,581$15,641,499
Q3 2023Renaissance Technologies LLCBuy3,4006,800$1,597
Q2 2023Renaissance Technologies LLCSell-4,1003,400$829

Frequently asked questions about IWB activity

  • Which institutional owners are buying IWB?

    Institutional owners buying IWB 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 IWB activity?

    "Buy" means an investor increased their reported position in IWB compared to the prior reporting period. This reflects growing exposure to ISHARES RUSSELL 1000 ETF (IWB) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in IWB increasing?

    Institutional interest in IWB 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.

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