BOSTON SCIENTIFIC CORP (BSX) Institutional Shareholders
BOSTON SCIENTIFIC CORP (BSX) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026. The institutional investors covered on this page collectively reported approximately $58.94B in BSX holdings during the latest filing period.
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 $5.62B, representing an estimated gain of +1.55% 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
1,455
Total Reported Value
$58.94B
Largest Holder
Blackrock, Inc.
Largest Position
$5.53B
Insider Transactions (90d)
12
Latest Filing Quarter
Q2 2026
New Institutional Positions
33
Funds Exiting Positions
1
| 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 | $5,620,370,899 | +$85,589,403 | +1.55% | |
| Vanguard Capital Management Llc | 0.09% | 97,087,553 | $4,143,696,762 | $4,207,774,547 | +$64,077,785 | +1.55% | |
| State Street Corp | 0.09% | 70,111,196 | $2,992,345,845 | $3,038,619,235 | +$46,273,390 | +1.55% | |
| Banque Cantonale Vaudoise | 0.40% | 67,611 | $2,886,000,000 | $2,930,261 | -$2,883,069,739 | -99.90% | |
| Primecap Management Co/Ca/ | 1.28% | 50,520,914 | $2,156,232,608 | $2,189,576,413 | +$33,343,805 | +1.55% | |
| Fmr Llc | 0.08% | 45,702,845 | $1,950,597,451 | $1,980,761,302 | +$30,163,851 | +1.55% | |
| Massachusetts Financial Services Co | 0.48% | 24,859,191 | $1,498,094,702 | $1,077,397,338 | -$420,697,364 | -28.08% | |
| Geode Capital Management, Llc | 0.08% | 33,440,102 | $1,420,478,040 | $1,449,294,021 | +$28,815,981 | +2.03% | |
| Vanguard Portfolio Management Llc | 0.06% | 29,792,794 | $1,271,556,448 | $1,291,219,692 | +$19,663,244 | +1.55% | |
| D. E. Shaw & Co., Inc. | 0.67% | 25,457,409 | $1,086,522,216 | $1,103,324,106 | +$16,801,890 | +1.55% | |
| Jpmorgan Chase & Co | 0.06% | 23,907,838 | $1,039,512,868 | $1,036,165,699 | -$3,347,169 | -0.32% | |
| Janus Henderson Group Plc | 0.51% | 16,497,366 | $1,035,201,522 | $714,995,842 | -$320,205,680 | -30.93% | |
| Arrowstreet Capital, Limited Partnership | 0.44% | 23,293,913 | $994,184,207 | $1,009,558,189 | +$15,373,982 | +1.55% | |
| Norges Bank | 0.09% | 21,170,029 | $903,536,838 | $917,509,057 | +$13,972,219 | +1.55% | |
| Ubs Am, A Distinct Business Unit Of Ubs Asset Management Americas Llc | 0.18% | 13,513,771 | $847,989,132 | $585,686,835 | -$262,302,297 | -30.93% | |
| Two Sigma Investments, Lp | 0.62% | 19,359,023 | $826,243,102 | $839,020,057 | +$12,776,955 | +1.55% | |
| Morgan Stanley | 0.04% | 18,947,147 | $808,664,356 | $821,169,351 | +$12,504,995 | +1.55% | |
| Bollard Group Llc | 23.93% | 18,420,720 | $786,196,000 | $798,354,005 | +$12,158,005 | +1.55% | |
| Goldman Sachs Group Inc | 0.08% | 16,954,342 | $723,611,345 | $734,801,182 | +$11,189,837 | +1.55% | |
| Capital World Investors | 0.08% | 16,812,257 | $717,600,310 | $728,643,218 | +$11,042,908 | +1.54% | |
| Ubs Group Ag | 0.11% | 16,352,420 | $697,921,286 | $708,713,883 | +$10,792,597 | +1.55% | |
| Wellington Management Group Llp | 0.11% | 15,301,828 | $653,082,019 | $663,181,226 | +$10,099,207 | +1.55% | |
| Capital Research Global Investors | 0.08% | 14,180,571 | $605,255,716 | $614,585,947 | +$9,330,231 | +1.54% | |
| Invesco Ltd. | 0.05% | 13,800,748 | $589,015,932 | $598,124,418 | +$9,108,486 | +1.55% | |
| Bank Of America Corp | 0.04% | 13,027,783 | $556,025,759 | $564,624,115 | +$8,598,356 | +1.55% | |
| Northern Trust Corp | 0.06% | 12,964,638 | $553,330,751 | $561,887,411 | +$8,556,660 | +1.55% | |
| Fil Ltd | 0.38% | 12,332,054 | $526,332,065 | $534,471,220 | +$8,139,155 | +1.55% | |
| Jane Street Group, Llc | 0.33% | 12,087,991 | $515,915,456 | $523,893,530 | +$7,978,074 | +1.55% | |
| Legal & General Group Plc | 0.09% | 10,119,264 | $431,890,184 | $438,568,902 | +$6,678,718 | +1.55% | |
| Aqr Capital Management Llc | 0.14% | 9,681,750 | $413,217,118 | $419,607,045 | +$6,389,927 | +1.55% | |
| Canada Pension Plan Investment Board | 0.22% | 9,262,404 | $395,319,403 | $401,432,589 | +$6,113,186 | +1.55% | |
| Dz Bank Ag Deutsche Zentral Genossenschafts Bank, Frankfurt Am Main | 0.31% | 9,227,707 | $393,838,384 | $399,928,821 | +$6,090,437 | +1.55% | |
| Charles Schwab Investment Management Inc | 0.05% | 9,223,151 | $393,644,085 | $399,731,364 | +$6,087,279 | +1.55% | |
| Qube Research & Technologies Ltd | 0.42% | 8,943,771 | $381,720,146 | $387,623,035 | +$5,902,889 | +1.55% | |
| Nuveen, Llc | 0.09% | 8,695,119 | $371,107,679 | $376,846,457 | +$5,738,778 | +1.55% | |
| Vanguard Fiduciary Trust Co | 0.08% | 8,345,428 | $356,182,867 | $361,690,850 | +$5,507,983 | +1.55% | |
| Royal Bank Of Canada | 0.06% | 8,100,653 | $345,736,000 | $351,082,301 | +$5,346,301 | +1.55% | |
| Bank Of New York Mellon Corp | 0.06% | 7,943,553 | $339,030,836 | $344,273,587 | +$5,242,751 | +1.55% | |
| Bnp Paribas Financial Markets | 0.17% | 7,620,469 | $325,241,617 | $330,271,126 | +$5,029,509 | +1.55% | |
| Price T Rowe Associates Inc | 0.03% | 7,070,412 | $301,766,000 | $306,431,656 | +$4,665,656 | +1.55% | |
| Ensign Peak Advisors, Inc | 0.53% | 4,507,242 | $282,829,436 | $195,343,868 | -$87,485,568 | -30.93% | |
| Deutsche Bank Ag\ | 0.07% | 5,957,053 | $254,247,022 | $258,178,677 | +$3,931,655 | +1.55% | |
| Maverick Capital Ltd | 2.29% | 5,937,553 | $253,414,762 | $257,333,547 | +$3,918,785 | +1.55% | |
| Dimensional Fund Advisors Lp | 0.05% | 5,824,298 | $248,646,534 | $252,425,075 | +$3,778,541 | +1.52% | |
| Bnp Paribas Asset Management Holding S.A. | 0.23% | 5,380,866 | $229,692,126 | $233,206,732 | +$3,514,606 | +1.53% | |
| Lazard Asset Management Llc | 0.35% | 5,343,777 | $228,072,393 | $231,599,295 | +$3,526,902 | +1.55% | |
| Ameriprise Financial Inc | 0.04% | 5,134,220 | $219,095,933 | $222,517,095 | +$3,421,162 | +1.56% | |
| Clearbridge Investments, Llc | 0.18% | 5,130,774 | $218,981,454 | $222,367,745 | +$3,386,291 | +1.55% | |
| Citadel Advisors Llc | 0.12% | 4,987,748 | $212,877,084 | $216,168,998 | +$3,291,914 | +1.55% | |
| Millennium Management Llc | 0.14% | 5,437,567 | $210,735,360 | $235,664,154 | +$24,928,794 | +11.83% |
Frequently asked questions about BSX
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Who owns the most BSX stock?
The largest holders of BSX are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for BOSTON SCIENTIFIC CORP (BSX).
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Is BSX widely held by superinvestors?
Many widely followed stocks like BSX appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly BSX is represented among the institutional managers we track.
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What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.