BSX Institutional Ownership & Shareholders
BOSTON SCIENTIFIC CORP (BSX) is currently held by 1,491 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $58.74B based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of BSX tracked by InsiderSet, reporting ownership valued at approximately $5.53B in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $5.75B, representing an estimated gain of +3.84% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 42% of the total disclosed BSX value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Vanguard Capital Management Llc, State Street Corp, and several other long-term asset managers with concentrated positions in BOSTON SCIENTIFIC CORP (BSX).
This page ranks the largest institutional BSX shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
1,491
Total Reported Value
$58.74B
Largest Holder
Blackrock, Inc.
Largest Position
$5.53B
Insider Transactions (90d)
9
Latest Filing Quarter
Q2 2026
New Institutional Positions
47
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.08% | 129,680,916 | $5,534,781,496 | $5,747,458,197 | +$212,676,701 | +3.84% | |
| Vanguard Capital Management Llc | 0.09% | 97,087,553 | $4,143,696,762 | $4,302,920,349 | +$159,223,587 | +3.84% | |
| State Street Corp | 0.09% | 70,111,196 | $2,992,345,845 | $3,107,328,207 | +$114,982,362 | +3.84% | |
| Banque Cantonale Vaudoise | 0.40% | 67,611 | $2,886,000,000 | $2,996,520 | -$2,883,003,480 | -99.90% | |
| Primecap Management Co/Ca/ | 1.28% | 50,520,914 | $2,156,232,608 | $2,239,086,908 | +$82,854,300 | +3.84% | |
| Fmr Llc | 0.08% | 45,702,845 | $1,950,597,451 | $2,025,550,090 | +$74,952,639 | +3.84% | |
| Massachusetts Financial Services Co | 0.48% | 24,859,191 | $1,498,094,702 | $1,101,759,345 | -$396,335,357 | -26.46% | |
| Geode Capital Management, Llc | 0.08% | 33,440,102 | $1,420,478,040 | $1,482,065,321 | +$61,587,281 | +4.34% | |
| Vanguard Portfolio Management Llc | 0.06% | 29,792,794 | $1,271,556,448 | $1,320,416,630 | +$48,860,182 | +3.84% | |
| D. E. Shaw & Co., Inc. | 0.67% | 25,457,409 | $1,086,522,216 | $1,128,272,367 | +$41,750,151 | +3.84% | |
| Jpmorgan Chase & Co | 0.06% | 23,907,838 | $1,039,512,868 | $1,059,595,380 | +$20,082,512 | +1.93% | |
| Janus Henderson Group Plc | 0.51% | 16,497,366 | $1,035,201,522 | $731,163,261 | -$304,038,261 | -29.37% | |
| Arrowstreet Capital, Limited Partnership | 0.44% | 23,293,913 | $994,184,207 | $1,032,386,224 | +$38,202,017 | +3.84% | |
| Norges Bank | 0.09% | 21,170,029 | $903,536,838 | $938,255,685 | +$34,718,847 | +3.84% | |
| Ubs Am, A Distinct Business Unit Of Ubs Asset Management Americas Llc | 0.18% | 13,513,771 | $847,989,132 | $598,930,331 | -$249,058,801 | -29.37% | |
| Two Sigma Investments, Lp | 0.62% | 19,359,023 | $826,243,102 | $857,991,899 | +$31,748,797 | +3.84% | |
| Morgan Stanley | 0.04% | 18,947,147 | $808,664,356 | $839,737,555 | +$31,073,199 | +3.84% | |
| Bollard Group Llc | 23.93% | 18,420,720 | $786,196,000 | $816,406,310 | +$30,210,310 | +3.84% | |
| Goldman Sachs Group Inc | 0.08% | 16,954,342 | $723,611,345 | $751,416,437 | +$27,805,092 | +3.84% | |
| Capital World Investors | 0.08% | 16,812,257 | $717,600,310 | $745,119,230 | +$27,518,920 | +3.83% | |
| Ubs Group Ag | 0.11% | 16,352,420 | $697,921,286 | $724,739,254 | +$26,817,968 | +3.84% | |
| Wellington Management Group Llp | 0.11% | 15,301,828 | $653,082,019 | $678,177,017 | +$25,094,998 | +3.84% | |
| Capital Research Global Investors | 0.08% | 14,180,571 | $605,255,716 | $628,482,907 | +$23,227,191 | +3.84% | |
| Invesco Ltd. | 0.05% | 13,800,748 | $589,015,932 | $611,649,151 | +$22,633,219 | +3.84% | |
| Bank Of America Corp | 0.04% | 13,027,783 | $556,025,759 | $577,391,343 | +$21,365,584 | +3.84% | |
| Northern Trust Corp | 0.06% | 12,964,638 | $553,330,751 | $574,592,756 | +$21,262,005 | +3.84% | |
| Fil Ltd | 0.38% | 12,332,054 | $526,332,065 | $546,556,633 | +$20,224,568 | +3.84% | |
| Jane Street Group, Llc | 0.33% | 12,087,991 | $515,915,456 | $535,739,761 | +$19,824,305 | +3.84% | |
| Legal & General Group Plc | 0.09% | 10,119,264 | $431,890,184 | $448,485,780 | +$16,595,596 | +3.84% | |
| Aqr Capital Management Llc | 0.14% | 9,681,750 | $413,217,118 | $429,095,160 | +$15,878,042 | +3.84% | |
| Canada Pension Plan Investment Board | 0.22% | 9,262,404 | $395,319,403 | $410,509,745 | +$15,190,342 | +3.84% | |
| Dz Bank Ag Deutsche Zentral Genossenschafts Bank, Frankfurt Am Main | 0.31% | 9,227,707 | $393,838,384 | $408,971,974 | +$15,133,590 | +3.84% | |
| Charles Schwab Investment Management Inc | 0.05% | 9,223,151 | $393,644,085 | $408,770,052 | +$15,125,967 | +3.84% | |
| Neuberger Berman Group Llc | 0.28% | 4,010,261 | $382,378,347 | $177,734,768 | -$204,643,579 | -53.52% | |
| Qube Research & Technologies Ltd | 0.42% | 8,943,771 | $381,720,146 | $396,387,931 | +$14,667,785 | +3.84% | |
| Nuveen, Llc | 0.09% | 8,695,119 | $371,107,679 | $385,367,674 | +$14,259,995 | +3.84% | |
| Vanguard Fiduciary Trust Co | 0.08% | 8,345,428 | $356,182,867 | $369,869,369 | +$13,686,502 | +3.84% | |
| Royal Bank Of Canada | 0.06% | 8,100,653 | $345,736,000 | $359,020,941 | +$13,284,941 | +3.84% | |
| Bank Of New York Mellon Corp | 0.06% | 7,943,553 | $339,030,836 | $352,058,269 | +$13,027,433 | +3.84% | |
| Bnp Paribas Financial Markets | 0.17% | 7,620,469 | $325,241,617 | $337,739,186 | +$12,497,569 | +3.84% | |
| Price T Rowe Associates Inc | 0.03% | 7,070,412 | $301,766,000 | $313,360,660 | +$11,594,660 | +3.84% | |
| Assenagon Asset Management S.A. | 0.29% | 6,734,463 | $293,959,310 | $298,471,400 | +$4,512,090 | +1.53% | |
| Ensign Peak Advisors, Inc | 0.53% | 4,507,242 | $282,829,436 | $199,760,965 | -$83,068,471 | -29.37% | |
| Deutsche Bank Ag\ | 0.07% | 5,957,053 | $254,247,022 | $264,016,589 | +$9,769,567 | +3.84% | |
| Maverick Capital Ltd | 2.29% | 5,937,553 | $253,414,762 | $263,152,349 | +$9,737,587 | +3.84% | |
| Dimensional Fund Advisors Lp | 0.05% | 5,824,298 | $248,646,534 | $258,132,887 | +$9,486,353 | +3.82% | |
| Bnp Paribas Asset Management Holding S.A. | 0.23% | 5,380,866 | $229,692,126 | $238,479,981 | +$8,787,855 | +3.83% | |
| Lazard Asset Management Llc | 0.35% | 5,343,777 | $228,072,393 | $236,836,197 | +$8,763,804 | +3.84% | |
| Ameriprise Financial Inc | 0.04% | 5,134,220 | $219,095,933 | $227,548,630 | +$8,452,697 | +3.86% | |
| Clearbridge Investments, Llc | 0.18% | 5,130,774 | $218,981,454 | $227,395,904 | +$8,414,450 | +3.84% |
Frequently asked questions about BSX
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Who are the largest institutional holders of BSX?
The largest institutional holders of BSX reported in the latest SEC Form 13F filings include Blackrock, Inc. , Vanguard Capital Management Llc , State Street Corp , Banque Cantonale Vaudoise , and Primecap Management Co/Ca/ . InsiderSet ranks institutional holders by their latest reported BSX position.
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What is BSX institutional ownership?
This page tracks BSX positions reported by institutional investment managers through SEC Form 13F. BOSTON SCIENTIFIC CORP (BSX) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
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How many institutions own BSX?
InsiderSet currently tracks 1,491 institutional managers reporting BSX holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of BSX shareholders.
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How much BSX stock do institutions own?
Institutional investment managers disclosed approximately $58.74B in BSX holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
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When was BSX institutional ownership last updated?
The latest BSX institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
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Are institutional BSX holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its BSX position after the reporting date.
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Are institutions buying or selling BSX?
Institutional buying and selling can be analyzed by comparing BSX positions across consecutive 13F reporting periods. InsiderSet's BSX Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View BSX ownership changes.
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How has BSX institutional ownership changed over time?
InsiderSet tracks BSX institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.