BOSTON SCIENTIFIC CORP (BSX)
Institutional ownership reported to the SEC as of Q2 2026, across 31 quarters.
1,397
Reporting holders
$59.2B
Reported value
89.6%
Of shares outstanding
5.4%
Held as options
-192
Holder change
Institutions report 1,298,688,782 shares against 1,449,229,526 outstanding. Shares only - option lines are excluded, which is why this can be compared with the company at all. The count comes from the cover page of the company's own most recent report, so it is dated when that was filed rather than at quarter end. A figure this high can overstate: where an adviser and a sub-adviser both report the same shares, both are counted.
Options share is the part of reported value carried in derivative lines rather than shares. A high figure means institutions are expressing a view on this security without owning much of it.
Holders
| Filer | Value | Shares | Their book | Held | Change |
|---|---|---|---|---|---|
| BlackRock, Inc. | $5.5B | 129,680,916 | 0.08% | 8q | -1.6%-$91.4M |
| VANGUARD CAPITAL MANAGEMENT LLC | $4.1B | 97,087,553 | 0.09% | 2q | +0.7%+$28.9M |
| STATE STREET CORP | $3.0B | 70,111,196 | 0.09% | 31q | +3.1%+$90.7M |
| PRIMECAP MANAGEMENT CO/CA/ | $2.2B | 50,520,914 | 1.28% | 31q | +55.3%+$767.9M |
| FMR LLC | $2.0B | 45,702,845 | 0.08% | 31q | -38.4%-$1.2B |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | $1.5B | 24,859,191 | 0.48% | 31q | +126.1%+$835.4M |
| JANE STREET GROUP, LLC | $1.4B | 12,087,991 | 0.12% | 31q | +199.8%+$960.3M |
| GEODE CAPITAL MANAGEMENT, LLC | $1.4B | 33,440,102 | 0.08% | 31q | HELD |
| VANGUARD PORTFOLIO MANAGEMENT LLC | $1.3B | 29,792,794 | 0.06% | 2q | HELD |
| JPMORGAN CHASE & CO | $1.2B | 23,907,838 | 0.07% | 31q | -28.3%-$483.1M |
| D. E. Shaw & Co., Inc. | $1.2B | 25,457,409 | 0.55% | 31q | +4.7%+$52.3M |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | $994.2M | 23,293,913 | 0.44% | 21q | +67.7%+$401.3M |
| NORGES BANK | $903.5M | 21,170,029 | 0.09% | 32q | -8.2%-$80.9M |
| TWO SIGMA INVESTMENTS, LP | $828.9M | 19,359,023 | 0.60% | 31q | +105.7%+$425.9M |
| GOLDMAN SACHS GROUP INC | $819.8M | 16,954,342 | 0.07% | 31q | -10.3%-$93.7M |
| MORGAN STANLEY | $808.7M | 18,947,147 | 0.04% | 35q | -14.9%-$141.7M |
| Jupiter Topco LLC | $803.4M | 18,822,853 | 0.33% | new | FIRST |
| Capital World Investors | $717.6M | 16,812,257 | 0.08% | 12q | +9.8%+$64.1M |
| UBS Group AG | $711.5M | 16,352,420 | 0.09% | 31q | +10.3%+$66.5M |
| WELLINGTON MANAGEMENT GROUP LLP | $653.1M | 15,301,828 | 0.11% | 31q | -18.8%-$150.7M |
| 1832 Asset Management L.P. | $642.6M | 4,556,876 | 0.32% | new | NEW |
| Amundi | $610.2M | 14,296,121 | 0.15% | 21q | +1.2%+$7.4M |
| Capital Research Global Investors | $605.3M | 14,180,571 | 0.08% | 10q | +100.3%+$303.0M |
| FRANKLIN RESOURCES INC | $596.7M | 13,772,323 | 0.13% | 30q | -5.0%-$31.5M |
| Invesco Ltd. | $589.0M | 13,800,748 | 0.05% | 31q | +52.5%+$202.7M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | $558.7M | 13,091,481 | 0.10% | 31q | -3.1%-$18.0M |
| BANK OF AMERICA CORP /DE/ | $556.0M | 13,027,783 | 0.04% | 31q | -42.8%-$415.2M |
| NORTHERN TRUST CORP | $553.3M | 12,964,638 | 0.06% | 31q | -3.1%-$17.5M |
| FIL Ltd | $526.3M | 12,332,054 | 0.38% | 31q | +283.7%+$389.2M |
| FARALLON CAPITAL MANAGEMENT, L.L.C. | $449.0M | 10,521,184 | 2.07% | 24q | +40.8%+$130.2M |
| DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main | $434.2M | 9,227,707 | 0.33% | 32q | -30.2%-$188.3M |
| CITADEL ADVISORS LLC | $433.4M | 4,987,748 | 0.05% | 31q | +18.3%+$66.9M |
| Legal & General Group Plc | $431.9M | 10,119,264 | 0.09% | 31q | -4.5%-$20.6M |
| AQR CAPITAL MANAGEMENT LLC | $413.2M | 9,681,750 | 0.14% | 31q | +84.8%+$189.6M |
| CANADA PENSION PLAN INVESTMENT BOARD | $395.3M | 9,262,404 | 0.22% | 31q | +15.3%+$52.3M |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $393.6M | 9,223,151 | 0.05% | 31q | +0.6%+$2.3M |
| Sixth Street Partners Management Company, L.P. | $393.6M | 9,223,151 | 0.05% | new | NEW |
| Qube Research & Technologies Ltd | $391.0M | 8,943,771 | 0.36% | 15q | +60.6%+$147.5M |
| Nuveen, LLC | $371.1M | 8,695,119 | 0.09% | 6q | -25.9%-$129.7M |
| Assenagon Asset Management S.A. | $356.3M | 8,347,118 | 0.22% | 24q | -17.0%-$73.0M |
| VANGUARD FIDUCIARY TRUST CO | $356.2M | 8,345,428 | 0.08% | 2q | HELD |
| ROYAL BANK OF CANADA | $345.8M | 8,100,653 | 0.05% | 31q | +29.1%+$78.0M |
| Bank of New York Mellon Corp | $339.0M | 7,943,553 | 0.06% | 31q | -16.8%-$68.3M |
| BNP PARIBAS FINANCIAL MARKETS | $332.6M | 7,620,469 | 0.12% | 31q | +49.4%+$109.9M |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | $279.7M | 1,661,950 | 0.02% | 31q | +60.9%+$105.8M |
| DEUTSCHE BANK AG\ | $254.2M | 5,957,053 | 0.07% | 34q | -10.5%-$29.7M |
| MAVERICK CAPITAL LTD | $253.4M | 5,937,553 | 2.24% | 3q | +41.5%+$74.4M |
| Ensign Peak Advisors, Inc | $251.0M | 5,881,367 | 0.41% | 27q | -34.8%-$133.7M |
| DIMENSIONAL FUND ADVISORS LP | $248.6M | 5,824,298 | 0.05% | 31q | -4.5%-$11.7M |
| Public Sector Pension Investment Board | $239.4M | 5,609,792 | 0.31% | 31q | +170.0%+$150.8M |
| MILLENNIUM MANAGEMENT LLC | $232.1M | 5,437,567 | 0.08% | 31q | +25.4%+$46.9M |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | $229.7M | 5,380,866 | 0.23% | 31q | -22.8%-$67.7M |
| LAZARD ASSET MANAGEMENT LLC | $228.1M | 5,343,777 | 0.35% | 33q | +9.5%+$19.8M |
| AMERIPRISE FINANCIAL INC | $219.1M | 5,134,220 | 0.04% | 31q | -53.9%-$256.6M |
| Clearbridge Investments, LLC | $219.0M | 5,130,774 | 0.18% | 15q | +125.1%+$121.7M |
| Holocene Advisors, LP | $214.9M | 806,732 | 0.48% | 14q | -76.5%-$698.3M |
| Vontobel Holding Ltd. | $214.4M | 4,871,518 | 0.68% | 23q | -38.9%-$136.7M |
| SCHRODER INVESTMENT MANAGEMENT GROUP | $200.9M | 4,708,211 | 0.14% | 31q | -35.1%-$108.6M |
| BARCLAYS PLC | $200.3M | 4,584,260 | 0.04% | 31q | -8.8%-$19.2M |
| Swiss National Bank | $178.9M | 4,191,800 | 0.09% | 31q | -3.7%-$6.8M |
| National Pension Service | $169.0M | 3,959,598 | 0.11% | 31q | +7.1%+$11.1M |
| Squarepoint Ops LLC | $168.9M | 1,624,929 | 0.19% | 24q | +2.2%+$3.6M |
| Allianz Asset Management GmbH | $157.6M | 2,400,485 | 0.14% | 40q | HELD |
| Mitsubishi UFJ Asset Management Co., Ltd. | $154.4M | 3,617,472 | 0.09% | 31q | +7.5%+$10.8M |
| HSBC HOLDINGS PLC | $150.6M | 3,533,722 | 0.06% | 31q | +3.9%+$5.7M |
| Ninety One UK Ltd | $149.5M | 3,501,985 | 0.33% | 17q | -52.1%-$162.5M |
| Sumitomo Mitsui Trust Group, Inc. | $146.3M | 3,427,875 | 0.08% | 31q | HELD |
| Employees Provident Fund Board | $143.3M | 3,358,700 | 0.82% | 7q | +57.3%+$52.2M |
| Vanguard Global Advisers, LLC | $142.5M | 3,337,790 | 0.07% | 2q | +2.9%+$4.0M |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC | $139.8M | 3,275,326 | 0.59% | 5q | +203.8%+$93.8M |
| Man Group plc | $137.7M | 3,225,164 | 0.22% | 15q | -13.3%-$21.1M |
| Caisse de depot et placement du Quebec | $133.2M | 3,120,394 | 0.19% | 31q | +110.1%+$69.8M |
| Alecta Tjanstepension Omsesidigt | $133.0M | 3,117,000 | 0.56% | 12q | +8.8%+$10.7M |
| Mirova US LLC | $132.4M | 3,101,478 | 1.42% | 3q | +40.8%+$38.3M |
| NOMURA HOLDINGS INC | $131.0M | 142,929 | 0.15% | 25q | -40.1%-$87.8M |
| Aberdeen Group plc | $130.9M | 3,066,626 | 0.18% | 31q | +10.9%+$12.8M |
| WELLS FARGO & COMPANY/MN | $130.2M | 3,051,613 | 0.02% | 31q | -48.6%-$123.4M |
| Russell Investments Group, Ltd. | $123.7M | 2,895,696 | 0.11% | 31q | +24.9%+$24.7M |
| VANGUARD ASSET MANAGEMENT, Ltd | $122.6M | 2,873,191 | 0.08% | 2q | +11.9%+$13.1M |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE | $115.3M | 2,702,583 | 0.09% | 31q | +2.8%+$3.1M |
| CITIGROUP INC | $114.7M | 2,582,561 | 0.04% | 31q | +63.8%+$44.7M |
| RHUMBLINE ADVISERS | $112.8M | 2,641,843 | 0.09% | 31q | -1.2%-$1.4M |
| NORDEA INVESTMENT MANAGEMENT AB | $110.9M | 2,610,440 | 0.09% | 31q | +96.3%+$54.4M |
| Rathbones Group PLC | $108.4M | 2,539,901 | 0.40% | 16q | -20.1%-$27.3M |
| MARSHALL WACE, LLP | $103.1M | 2,414,223 | 0.08% | 31q | -33.1%-$51.1M |
| RENAISSANCE TECHNOLOGIES LLC | $102.9M | 2,412,005 | 0.14% | 6q | -23.5%-$31.6M |
| Temasek Holdings (Private) Ltd | $102.4M | 2,399,426 | 0.27% | 7q | HELD |
| Pictet Asset Management Holding SA | $102.2M | 2,393,080 | 0.10% | 12q | -53.3%-$116.4M |
| Unisphere Establishment | $101.9M | 2,387,800 | 0.87% | 11q | -14.8%-$17.7M |
| MILFORD FUNDS LTD | $92.6M | 2,169,484 | 1.51% | 3q | -1.8%-$1.7M |
| ALLIANCEBERNSTEIN L.P. | $91.3M | 1,455,619 | 0.03% | 31q | -10.5%-$10.7M |
| NEUBERGER BERMAN GROUP LLC | $91.3M | 2,126,406 | 0.06% | 31q | -69.9%-$212.4M |
| California Public Employees Retirement System | $87.4M | 2,047,848 | 0.05% | 31q | -9.4%-$9.1M |
| TUDOR INVESTMENT CORP ET AL | $84.1M | 1,477,637 | 0.12% | 14q | +133.6%+$48.1M |
| Phoenix Financial Ltd. | $83.8M | 1,962,730 | 0.57% | 24q | +26.6%+$17.6M |
| RAYMOND JAMES FINANCIAL INC | $82.1M | 1,923,305 | 0.02% | 7q | -36.5%-$47.2M |
| Caption Management, LLC | $79.7M | 312,050 | 0.37% | 7q | -16.7%-$15.9M |
| PEAK6 LLC | $79.6M | 683,808 | 0.16% | 7q | +2461.1%+$76.5M |
| STIFEL FINANCIAL CORP | $75.2M | 1,760,990 | 0.06% | 31q | -11.0%-$9.3M |
| Walleye Capital LLC | $74.7M | 1,578,172 | 0.27% | 19q | +88.8%+$35.1M |
Five percent filings
Anyone crossing 5% of a company must say so within days - far sooner than the next quarterly holdings report. A 13D declares an intent to influence the company; a 13G is the passive version. See all activist filings →
| Filed | Form | Filer | % of class |
|---|---|---|---|
| 2026-08-06 | 13G/A | FMR LLCwith 1 co-filers | 3.1% |
Quarter by quarter
Coverage begins with the quarter ending 2018-12-31. Earlier filings exist only as occasional late amendments, too sparse to describe a market, so they are not shown.
| Quarter | Holders | Value | Shares | New | Added | Trimmed | Options |
|---|---|---|---|---|---|---|---|
| Q2 2026 | 1,397 | $59.2B | 1,298,688,782 | 139 | 536 | 574 | 5.4% |
| Q1 2026 | 1,589 | $84.2B | 1,305,880,135 | 163 | 622 | 570 | 2.6% |
| Q4 2025 | 1,695 | $126.8B | 1,310,690,491 | 127 | 600 | 607 | 1.5% |
| Q3 2025 | 1,618 | $130.6B | 1,316,672,859 | 155 | 678 | 470 | 1.6% |
| Q2 2025 | 1,586 | $140.1B | 1,288,460,854 | 132 | 651 | 486 | 1.3% |
| Q1 2025 | 1,537 | $131.0B | 1,282,280,107 | 197 | 594 | 473 | 1.4% |
| Q4 2024 | 1,416 | $115.7B | 1,276,670,143 | 114 | 530 | 425 | 1.4% |
| Q3 2024 | 1,296 | $109.2B | 1,282,839,488 | 143 | 490 | 400 | 1.4% |
| Q2 2024 | 1,216 | $100.2B | 1,284,142,214 | 136 | 478 | 353 | 1.4% |
| Q1 2024 | 1,123 | $91.5B | 1,322,771,162 | 137 | 372 | 377 | 1.0% |
| Q4 2023 | 1,040 | $77.0B | 1,313,910,156 | 95 | 374 | 306 | 1.3% |
| Q3 2023 | 946 | $67.6B | 1,264,371,432 | 75 | 364 | 285 | 1.4% |
| Q2 2023 | 936 | $68.1B | 1,248,498,861 | 108 | 324 | 289 | 0.9% |
| Q1 2023 | 871 | $67.0B | 1,340,976,587 | 113 | 324 | 251 | 0.5% |
| Q4 2022 | 754 | $52.0B | 1,126,243,437 | 94 | 235 | 224 | 0.7% |
| Q3 2022 | 868 | $52.4B | 1,336,884,191 | 75 | 309 | 272 | 0.9% |
| Q2 2022 | 877 | $49.2B | 1,303,250,084 | 70 | 303 | 298 | 1.3% |
| Q1 2022 | 907 | $57.8B | 1,288,398,386 | 92 | 334 | 278 | 1.2% |
| Q4 2021 | 897 | $55.8B | 1,290,567,242 | 75 | 276 | 298 | 1.6% |
| Q3 2021 | 883 | $57.3B | 1,302,077,231 | 77 | 307 | 271 | 1.4% |
| Q2 2021 | 874 | $56.2B | 1,295,414,511 | 96 | 287 | 284 | 1.4% |
| Q1 2021 | 835 | $50.6B | 1,298,050,218 | 76 | 280 | 289 | 1.0% |
| Q4 2020 | 870 | $48.3B | 1,280,816,619 | 83 | 323 | 274 | 1.4% |
| Q3 2020 | 851 | $50.5B | 1,310,246,163 | 75 | 306 | 286 | 1.0% |
| Q2 2020 | 843 | $46.4B | 1,305,614,078 | 107 | 337 | 240 | 1.2% |
| Q1 2020 | 800 | $42.4B | 1,286,763,175 | 82 | 280 | 295 | 0.9% |
| Q4 2019 | 858 | $59.4B | 1,304,489,418 | 100 | 273 | 259 | 0.6% |
| Q3 2019 | 775 | $52.8B | 1,289,232,774 | 83 | 250 | 267 | 0.7% |
| Q2 2019 | 758 | $56.2B | 1,295,228,724 | 72 | 266 | 241 | 1.0% |
| Q1 2019 | 797 | $49.8B | 1,291,197,807 | 103 | 282 | 234 | 0.4% |
| Q4 2018 | 738 | $46.0B | 1,293,175,710 | 11 | 13 | 13 | 0.6% |