ISHARES CORE 1-5 YEAR USD BO (ISTB) Institutional Ownership Changes & 13F Activity

ISHARES CORE 1-5 YEAR USD BO (ISTB) 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 Matrix Private Capital Group, Renaissance Technologies LLC, and Matrix Advisors Value Fund.

Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q1 2026Matrix Private Capital GroupSell-62718$872
Q4 2025Renaissance Technologies LLCSell-231,30041,800$2,037,750
Q3 2025Renaissance Technologies LLCSell-133,400273,100$13,338,204
Q2 2025Renaissance Technologies LLCSell-121,900406,500$19,776,225
Q1 2025Renaissance Technologies LLCBuy303,388528,400$25,548,140
Q4 2024Renaissance Technologies LLCSell-16,449225,012$10,748,823
Q3 2024Renaissance Technologies LLCBuy130,861241,461$11,754,321
Q2 2024Renaissance Technologies LLCBuy32,900110,600$5,239,122
Q1 2024Renaissance Technologies LLCBuy72,17777,700$3,686
Q3 2023Renaissance Technologies LLCSell-23,4315,523$256
Q4 2021Renaissance Technologies LLCSell-70,74628,954$1,460
Q3 2021Matrix Private Capital GroupSell-436645$33
Q2 2021Renaissance Technologies LLCSell-1,40899,700$5,114
Q2 2021Matrix Private Capital GroupBuy4871,081$55
Q1 2021Renaissance Technologies LLCSell-125,256101,108$5,186
Q1 2021Matrix Advisors Value FundBuy23,91858,051$2,977
Q4 2020Renaissance Technologies LLCBuy150,838226,364$11,689
Q4 2020Matrix Advisors Value FundBuy12,93134,133$1,763
Q3 2020Renaissance Technologies LLCSell-57,47475,526$3,893
Q3 2020Matrix Advisors Value FundBuy3,95021,202$1,093
Q2 2020Renaissance Technologies LLCBuy61,909133,000$6,846
Q2 2020Matrix Advisors Value FundBuy1,88117,252$888
Q1 2020Renaissance Technologies LLCSell-47,30971,091$3,590
Q1 2020Matrix Private Capital GroupSell-2,469594$30
Q1 2020Matrix Advisors Value FundBuy38315,371$776
Q4 2019Renaissance Technologies LLCBuy50,700118,400$5,967
Q4 2019Matrix Advisors Value FundBuy10,28914,988$755
Q4 2019Matrix Private Capital GroupBuy3,0633,063$154
Q3 2019Matrix Advisors Value FundBuy4,6994,699$237
Q3 2019Renaissance Technologies LLCSell-15867,700$3,418

Frequently asked questions about ISTB activity

  • Which institutional owners are buying ISTB?

    Institutional owners buying ISTB 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 ISTB activity?

    "Buy" means an investor increased their reported position in ISTB compared to the prior reporting period. This reflects growing exposure to ISHARES CORE 1-5 YEAR USD BO (ISTB) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in ISTB increasing?

    Institutional interest in ISTB 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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