BOSTON SCIENTIFIC CORP (BSX) Institutional Ownership Changes & 13F Activity

BOSTON SCIENTIFIC CORP (BSX). Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings. This page analyzes institutional buying and selling activity, new holdings, and sold-out positions among tracked filers. Notable filers include Polen Capital Management, Renaissance Technologies LLC, Parnassus Endeavor Fund, Lone Pine Capital, and Sequoia Financial Advisors.

Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q1 2026Polen Capital ManagementSell-3,439,813579,739$36,378,606
Q1 2026Renaissance Technologies LLCBuy769,3003,152,005$197,788,314
Q1 2026Parnassus Endeavor FundBuy104,5808,003,820$502,239,705
Q1 2026Lone Pine CapitalSell-97,048104,655$6,567,101
Q1 2026Sequoia Financial AdvisorsBuy68548,236$3,026,801
Q4 2025Polen Capital ManagementSell-1,578,7344,019,552$383,264,286
Q4 2025Renaissance Technologies LLCBuy1,465,6002,382,705$227,190,922
Q4 2025Parnassus Endeavor FundBuy1,014,8007,899,240$753,192,534
Q4 2025Lone Pine CapitalBuy201,703201,703$19,232,381
Q4 2025Viking Global InvestorsSell-131,8742,509,808$239,310,193
Q4 2025Egerton Capital UKBuy72,5805,385,084$513,467,759
Q4 2025Sequoia Financial AdvisorsBuy5,67847,551$4,534,002
Q4 2025Mairs & Power Growth FundSell-13110,176$970,282
Q3 2025Parnassus Endeavor FundBuy6,868,4596,884,440$672,127,878
Q3 2025Polen Capital ManagementBuy5,598,2865,598,286$546,560,636
Q3 2025Egerton Capital UKBuy3,671,5485,312,504$518,659,766
Q3 2025Renaissance Technologies LLCSell-579,436917,105$89,536,961
Q3 2025Viking Global InvestorsSell-404,0822,641,682$257,907,414
Q3 2025Dodge & Cox Stock FundSell-1,50088,885$8,677,843
Q3 2025Sequoia Financial AdvisorsBuy1,12541,873$4,088,069
Q3 2025Mairs & Power Growth FundSell-10210,307$1,006,272
Q2 2025Egerton Capital UKBuy1,640,9561,640,956$176,255,084
Q2 2025Renaissance Technologies LLCBuy844,9881,496,541$160,743,469
Q2 2025Viking Global InvestorsBuy669,0003,045,764$327,145,511
Q2 2025Sequoia Financial AdvisorsBuy2,29340,748$4,376,721
Q2 2025Dodge & Cox Stock FundSell-1,31090,385$9,708,253
Q2 2025Parnassus Endeavor FundBuy91715,981$1,716,519
Q2 2025Mairs & Power Growth FundBuy9810,409$1,118,031
Q1 2025Renaissance Technologies LLCBuy393,528651,553$65,728,667
Q1 2025Viking Global InvestorsBuy204,5562,376,764$239,767,952

Frequently asked questions about BSX activity

  • Which institutional owners are buying BSX?

    Institutional owners buying BSX 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 BSX activity?

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

  • Is institutional interest in BSX increasing?

    Institutional interest in BSX 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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