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 2019Viking Global InvestorsSell-1,981,4593,220,369$123,598
Q1 2019Renaissance Technologies LLCBuy1,096,6242,190,929$84,088
Q1 2019Dodge & Cox Stock FundSell-20,065176,745$6,783
Q4 2018Viking Global InvestorsBuy2,045,8275,201,828$183,833
Q4 2018Dodge & Cox Stock FundSell-7,445196,810$6,955
Q3 2018Appaloosa ManagementSell-1,674,263853,875$32,874
Q3 2018Viking Global InvestorsBuy1,544,0663,156,001$121,506
Q3 2018Dodge & Cox Stock FundSell-7,700204,255$7,864
Q2 2018Appaloosa ManagementSell-1,382,6002,528,138$82,670
Q2 2018Dodge & Cox Stock FundSell-26,400211,955$6,931
Q1 2018Appaloosa ManagementSell-871,9453,910,738$106,841
Q1 2018Renaissance Technologies LLCSell-52,0001,094,305$29,896
Q1 2018Dodge & Cox Stock FundSell-15,000238,355$6,512
Q4 2017Appaloosa ManagementBuy1,029,8174,782,683$118,563
Q4 2017Renaissance Technologies LLCSell-866,1001,146,305$28,417
Q4 2017Dodge & Cox Stock FundSell-49,000253,355$6,281
Q3 2017Renaissance Technologies LLCSell-3,293,2002,012,405$58,702
Q3 2017Appaloosa ManagementBuy1,487,9663,752,866$109,471
Q3 2017Dodge & Cox Stock FundSell-21,900302,355$8,820
Q2 2017Appaloosa ManagementSell-1,075,1002,264,900$62,783
Q2 2017Renaissance Technologies LLCSell-421,1005,305,605$147,071
Q2 2017Dodge & Cox Stock FundSell-4,400324,255$8,988
Q1 2017Renaissance Technologies LLCBuy3,101,4005,726,705$142,423
Q1 2017Appaloosa ManagementBuy2,790,0003,340,000$83,066
Q1 2017Dodge & Cox Stock FundSell-43,016328,655$8,174
Q4 2016Renaissance Technologies LLCBuy741,3002,625,305$56,785
Q4 2016Appaloosa ManagementBuy550,000550,000$11,897
Q4 2016Dodge & Cox Stock FundSell-10,459371,671$8,039
Q3 2016Renaissance Technologies LLCSell-3,017,9001,884,005$44,839
Q3 2016Dodge & Cox Stock FundSell-2,800382,130$9,095

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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