13F

Stock

Boston Scientific Corp

BSX · held by 1,656 managers

Reported value

$81.1B

Holders

1,656

+161 new · −277 exited

Holders’ est. mark

−$29.9B

Price effect on 234 books still in the name

Largest holder

$8.27B

BlackRock, Inc.

Notable conviction

Share of each notable manager’s 13F book.

Holder count by quarter

Who holds it

Notable only
InvestorSharesValueEst. markChange
BlackRock, Inc.131.8M$8.27B−$4.3BCut−$4.69B
VANGUARD CAPITAL MANAGEMENT LLC96.4M$6.05BHeld
Fidelity74.2M$4.66B−$2.42BCut−$4.63B
State Street68M$4.27B−$2.15BCut−$2.01B
JPMORGAN CHASE & CO33.4M$2.1B−$822.6MCut−$320.6M
GEODE CAPITAL MANAGEMENT, LLC33.3M$2.08B−$1.05BCut−$994.2M
PRIMECAP MANAGEMENT CO/CA/32.5M$2.04B−$1.01BCut−$923.8M
VANGUARD PORTFOLIO MANAGEMENT LLC29.8M$1.87BHeld
D. E. Shaw & Co., Inc.24.3M$1.53B−$366.7MAdded$453M
BANK OF AMERICA CORP /DE/22.8M$1.43B−$741.9MCut−$966.8M
MORGAN STANLEY22.3M$1.4B−$725.9MCut−$792.1M
GOLDMAN SACHS GROUP INC18.9M$1.19B−$540.5MCut−$395.4M
WELLINGTON MANAGEMENT GROUP LLP18.8M$1.18B−$316.5MAdded$256M
JANUS HENDERSON GROUP PLC16.5M$1.04B−$410.4MCut−$165.2M
Capital World Investors15.3M$960.7M−$499.1MCut−$1.63B
UBS Group AG14.8M$930.2M−$483.3MCut−$487.8M
FRANKLIN RESOURCES INC14.5M$909.8M−$185MAdded$368.6M
Amundi14.1M$886.2M−$404.7MCut−$297.6M
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP13.9M$871.7M−$359.8MCut−$180.5M
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC13.5M$848M−$356.5MCut−$194.8M
NORTHERN TRUST CORP13.4M$839.2M−$436MCut−$489.5M
DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main13.2M$830.2M−$431.3MCut−$937.7M
Nuveen, LLC11.7M$736.3M−$305.5MCut−$157.3M
MASSACHUSETTS FINANCIAL SERVICES CO /MA/11M$716.9M−$274MCut−$149.4M
Legal & General Group Plc10.6M$665.2M−$345.6MCut−$371.9M
Assenagon Asset Management S.A.10.1M$631.1M−$140.4MAdded$220.5M
Bank of New York Mellon Corp9.54M$598.9M−$311.1MCut−$471.4M
TWO SIGMA INVESTMENTS, LP9.41M$590.6M−$80.6MAdded$354.9M
CHARLES SCHWAB INVESTMENT MANAGEMENT INC9.17M$575.4M−$291.7MCut−$277.6M
Invesco Ltd.9.05M$568M−$295.1MCut−$701.9M
VANGUARD FIDUCIARY TRUST CO8.38M$526MHeld
CANADA PENSION PLAN INVESTMENT BOARD8.04M$504.3M−$223.7MCut−$150M
PARNASSUS INVESTMENTS, LLC8M$502.2M−$257.5MCut−$251M
Vontobel Holding Ltd.7.98M$500.6M−$122.7MAdded$141.8M
EDGEWOOD MANAGEMENT LLC7.63M$478.7M−$248.7MCut−$265.3M
FARALLON CAPITAL MANAGEMENT LLC7.47M$468.8M−$242.5MCut−$240.6M
Ninety One UK Ltd7.31M$458.6M−$177.5MCut−$60.5M
1832 Asset Management L.P.7.25M$455.1M−$71.8MAdded$245.2M
SCHRODER INVESTMENT MANAGEMENT GROUP7.25M$455.1M−$236.4MCut−$341.1M
Capital Research Global Investors7.08M$444.3M−$230.8MCut−$231.1M
NEUBERGER BERMAN GROUP LLC7.07M$443.8M−$130.7MAdded$61.4M
BNP PARIBAS ASSET MANAGEMENT Holding S.A.6.97M$437.3M$436.6MAdded$436.6M
DEUTSCHE BANK AG\6.65M$417.5M−$216.9MCut−$225.9M
ROYAL BANK OF CANADA6.27M$393.6M−$181MCut−$135.7M
DIMENSIONAL FUND ADVISORS LP6.1M$382.7M−$187MCut−$164.2M
Qube Research & Technologies Ltd5.57M$349.5M−$179.5MCut−$175.5M
AMERIPRISE FINANCIAL INC5.57M$349.4M−$182MCut−$263.7M
Icahn Capital5.24M$327.3M−$36.1MAdded$222.6M
Pictet Asset Management Holding SA5.12M$321.3M−$140.2MCut−$88.7M
BNP PARIBAS FINANCIAL MARKETS5.1M$320.1M−$107.4MAdded$5.99M
BARCLAYS PLC5.02M$315.3M−$142.2MCut−$100.5M
FIRST MANHATTAN CO. LLC.4.91M$308.2M−$61.4MAdded$128.7M
LAZARD ASSET MANAGEMENT LLC4.88M$306.3M−$127.5MCut−$66.6M
ADAGE CAPITAL PARTNERS GP, L.L.C.4.63M$290.7M−$67.9MAdded$92.2M
Ensign Peak Advisors, Inc4.51M$282.8M−$51.4MAdded$132.4M
Swiss National Bank4.35M$273M−$132.4MCut−$114.2M
Citadel4.22M$264.6M−$137.5MCut−$190.7M
MAVERICK CAPITAL LTD4.2M$263.2M−$96MCut−$17.5M
JANE STREET GROUP, LLC4.03M$253M−$123.7MCut−$108.7M
MILLENNIUM MANAGEMENT LLC4.34M$240.8M−$154.4MCut−$785.6M
Man Group plc3.72M$233.4M−$121.2MCut−$185.5M
National Pension Service3.7M$232.1M−$120.6MCut−$126.6M
Point72 Asset Management, L.P.3.69M$231.4M−$79.4MCut−$756.6K
MARSHALL WACE, LLP3.61M$226.6M−$96.4MCut−$55.4M
Holocene Advisors, LP3.43M$215.2M−$111.8MCut−$211.2M
Sumitomo Mitsui Trust Group, Inc.3.42M$214.8M−$111.6MCut−$114.9M
HSBC HOLDINGS PLC3.4M$212.7M−$111.7MCut−$132M
Mitsubishi UFJ Asset Management Co., Ltd.3.36M$211.1M−$99.4MCut−$83.6M
Vanguard Global Advisers, LLC3.24M$203.6MHeld
FIL Ltd3.21M$201.7M−$104.8MCut−$252M
Rathbones Group PLC3.18M$199.5M−$90MCut−$63.6M
Renaissance Technologies3.15M$197.8M−$77.7MCut−$29.4M
RAYMOND JAMES FINANCIAL INC3.03M$190.1M−$98.7MCut−$146.8M
WELLS FARGO & COMPANY/MN2.97M$186.5M−$96.9MCut−$208M
Alecta Tjanstepension Omsesidigt2.87M$179.7M−$89.5MCut−$81.8M
Unisphere Establishment2.8M$175.9M−$71MCut−$31.7M
Aberdeen Group plc2.77M$173.6M−$86.2MCut−$78.6M
RHUMBLINE ADVISERS2.67M$167.8M−$87.2MCut−$89.4M
MANUFACTURERS LIFE INSURANCE COMPANY, THE2.63M$165M−$33.6MAdded$66.8M
AMERICAN CENTURY COMPANIES INC2.62M$164.3M−$85.3MCut−$274.6M
VANGUARD ASSET MANAGEMENT, Ltd2.57M$161.1MHeld
Mariner, LLC2.48M$155.9M−$14.1MAdded$114.8M
ALLIANCEBERNSTEIN L.P.1.63M$155M$0Cut−$112M
Temasek Holdings (Private) Ltd2.4M$150.6M−$67.9MCut−$47.9M
Allianz Asset Management GmbH2.39M$150.2M−$65.2MCut−$40.4M
ORBIMED ADVISORS LLC2.38M$149.5M−$77.7MCut−$81.2M
Russell Investments Group, Ltd.2.32M$145.5M−$63.5MCut−$40.1M
BANK OF NOVA SCOTIA2.3M$144.5M−$65MCut−$45.6M
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM2.3M$144.3M−$75MCut−$80.5M
Clearbridge Investments, LLC2.28M$143M−$23.9MAdded$73.1M
WORLDQUANT MILLENNIUM ADVISORS LLC2.27M$142.7M−$74.1MCut−$180.2M
California Public Employees Retirement System2.26M$141.9M−$73.7MCut−$145.3M
Ilex Capital Partners (UK) LLP2.23M$140.2M−$52.2MCut−$12.4M
MILFORD FUNDS LTD2.21M$138.7M−$26.6MAdded$61M
Mirova US LLC2.2M$138.3M−$44.7MAdded$7.63M
Employees Provident Fund Board2.13M$133.9M−$69.6MCut−$69.6M
PUBLIC SECTOR PENSION INVESTMENT BOARD2.08M$130.4M−$46.2MCut−$4.67M
SEB Asset Management AB2.08M$130.3MHeld
CREDIT AGRICOLE S A2.02M$126.9M−$65.9MCut−$80.4M
STIFEL FINANCIAL CORP1.98M$124.1M−$64.5MCut−$77.5M
CIBC Bancorp USA Inc.1.94M$121.9MHeld
GREAT LAKES ADVISORS, LLC1.88M$117.9M−$57.9MCut−$51.5M
NEW YORK STATE COMMON RETIREMENT FUND1.81M$113.8M−$59MCut−$58.7M
TD Asset Management Inc1.8M$112.9M−$58.7MCut−$65M
Zurcher Kantonalbank (Zurich Cantonalbank)1.79M$112.4M−$56.4MCut−$52.6M
JONES FINANCIAL COMPANIES LLLP1.53M$105.9M−$1.17MAdded$101.7M
ENVESTNET ASSET MANAGEMENT INC1.69M$105.8M−$55MCut−$142.7M
PRINCIPAL FINANCIAL GROUP INC1.69M$105.8M−$54.5MCut−$53.6M
Alphinity Investment Management Pty Ltd1.67M$105M−$54.5MCut−$147.9M
CAPITAL FUND MANAGEMENT S.A.1.67M$104.5M−$37.6MCut−$5.31M
CONGRESS ASSET MANAGEMENT CO1.63M$102.3M−$53.1MCut−$55.1M
Squarepoint Ops LLC1.59M$99.8M−$51.8MCut−$189.6M
CITIGROUP INC1.58M$98.9M−$44.2MCut−$30.4M
Navera Investment Management Ltd.1.56M$97.7MNew
Phoenix Financial Ltd.1.55M$97.3M−$2.12MAdded$91.1M
PRUDENTIAL FINANCIAL INC1.55M$97.2M−$50.5MCut−$53.9M
Universal- Beteiligungs- und Servicegesellschaft mbH1.54M$96.7M−$45.1MCut−$35.1M
TCW GROUP INC1.54M$96.4M−$46.6MCut−$39.9M
AVIVA PLC1.49M$93.4M−$48.4MCut−$48.3M
Caisse de depot et placement du Quebec1.49M$93.2M−$47.1MCut−$44.7M
Bellevue Group AG1.47M$92M−$47.8MCut−$56.7M
FRED ALGER MANAGEMENT, LLC1.45M$91.3M−$35.8MCut−$13.3M
HUNTINGTON NATIONAL BANK1.41M$88.2M−$45.8MCut−$48M
GROUPAMA ASSET MANAGMENT1.38M$86.3M−$44.6MCut−$44M
Impax Asset Management Group plc1.36M$85.3M−$44.3MCut−$79.1M
Balyasny Asset Management L.P.1.36M$85.1M−$44.2MCut−$151.5M
Eurizon Capital SGR S.p.A.1.35M$84.8M−$42.3MCut−$39.1M
MENORA MIVTACHIM HOLDINGS LTD.1.33M$83.7MNew
BANK OF MONTREAL /CAN/1.32M$83.1M−$43.2MCut−$111.4M
NORDEA INVESTMENT MANAGEMENT AB1.33M$82.1M−$4.99MAdded$68M
STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM1.29M$80.9M−$42MCut−$42M
Cerity Partners LLC1.26M$79.3M−$41.2MCut−$41.4M
Candriam S.C.A.1.26M$79.2M−$36.8MCut−$28.6M
NATIONAL BANK OF CANADA /FI/1.26M$79.1M−$41.1MCut−$42.6M
Swedbank AB1.26M$79M−$41MCut−$248M
STOREBRAND ASSET MANAGEMENT AS1.2M$75.1M−$39MCut−$60.4M
PNC Financial Services Group, Inc.1.16M$72.8M−$37.8MCut−$40.5M
Korea Investment CORP1.13M$71.2M−$37MCut−$64.1M
Schonfeld Strategic Advisors LLC1.11M$69.4M−$19.5MAdded$12.2M
Allspring Global Investments Holdings, LLC1.09M$67.8M−$35.8MCut−$138M
VOLORIDGE INVESTMENT MANAGEMENT, LLC1.08M$67.7M−$35.1MCut−$104.4M
FEDERATED HERMES, INC.1.04M$65.3M−$33.9MCut−$94.6M
SUSQUEHANNA INTERNATIONAL GROUP, LLP1.03M$64.8M−$18.1MAdded$11.8M
SEI INVESTMENTS CO1.02M$64.1M−$33.3MCut−$146.4M
NOMURA ASSET MANAGEMENT CO LTD1.02M$63.7M−$29.6MCut−$22.8M
Federation des caisses Desjardins du Quebec998.2K$62.6M−$21.5MCut−$342.9K
Danica Pension, Livsforsikringsaktieselskab970.3K$60.9M−$31.6MCut−$129.3M
MACKENZIE FINANCIAL CORP959.9K$60.2M−$31.7MCut−$137.9M
Longaeva Partners L.P.957.3K$60.1MNew
AMF Tjanstepension AB952K$59.7M−$31MCut−$31.1M
Homestead Advisers Corp942.1K$59.1M−$17.8MAdded$6.98M
PFA Pension, Forsikringsaktieselskab925.5K$58.1M−$30.8MCut−$30.9M
BANQUE PICTET & CIE SA921.2K$57.8M−$8.83MAdded$32M
Harvest Portfolios Group Inc.917K$57.5M−$19.5MAdded$584.1K
JENNISON ASSOCIATES LLC897.8K$56.3M−$29.3MCut−$465.1M
ABN AMRO INVESTMENT SOLUTIONS894.3K$56.1M−$22.4MCut−$9.39M
Lansforsakringar Fondforvaltning AB (publ)893.7K$56.1M−$25.8MCut−$19.4M
Fisher Funds Management LTD861K$54M−$12.2MAdded$18.6M
NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO854.3K$53.6M−$24MCut−$16.6M
LPL Financial LLC848K$53.2M−$27.6MCut−$109.4M
Walleye Capital LLC836K$52.5M−$27.3MCut−$142.2M
DANSKE BANK A/S834.7K$52.4M−$27.2MCut−$30.1M
STATE OF WISCONSIN INVESTMENT BOARD834K$52.3M−$25MCut−$20.9M
PANAGORA ASSET MANAGEMENT INC822.1K$51.6M−$26.8MCut−$90.4M
Calamos Advisors LLC817.7K$51.3M−$26.7MCut−$31.8M
Connor, Clark & Lunn Investment Management Ltd.807.4K$50.7M−$26.3MCut−$27.4M
Banque Transatlantique SA798.9K$50.2M−$25.9MCut−$65.2M
Vestal Point Capital, LP800K$50.2MNew
BSN CAPITAL PARTNERS Ltd500K$50.1M$0Held
Prosight Management, LP795.5K$49.9M−$6.85MAdded$29.9M
HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND789.1K$49.5M−$18.9MCut−$5.65M
STRS OHIO782K$49.1M−$25.5MCut−$35.9M
Asset Management One Co., Ltd.778.4K$48.8M−$25.7MCut−$35.3M
APG Asset Management N.V.896.4K$48.8M−$24MCut−$31.5M
NICHOLAS COMPANY, INC.741.3K$46.5M−$20.4MCut−$13.3M
Vanguard Investments Australia, Ltd.737.7K$46.3MHeld
SANDS CAPITAL MANAGEMENT, LLC736.1K$46.2M−$24MCut−$30.6M
EDMOND DE ROTHSCHILD HOLDING S.A.734.7K$46.1M−$1.59MAdded$41.4M
Chevy Chase Trust Holdings, LLC733.1K$46M−$23.9MCut−$25.7M
UniSuper Management Pty Ltd719.7K$45.2M−$23.5MCut−$27.4M
Rockefeller Capital Management L.P.711.9K$44.7M−$19.4MCut−$12.1M
COMPASS CAPITAL MANAGEMENT, INC710.9K$44.6M−$19MCut−$11.1M
Mitsubishi UFJ Trust & Banking Corp706K$44.3M−$23MCut−$26.9M
ZWJ INVESTMENT COUNSEL INC704.1K$44.2M−$18.6MCut−$10.3M
CI INVESTMENTS INC.703.4K$44.1M−$22.9MCut−$72.3M
TOCQUEVILLE ASSET MANAGEMENT L.P.678.2K$42.6M−$14.5MAdded$245.8K
Quadrature Capital Ltd670.1K$42MNew
ROYAL LONDON ASSET MANAGEMENT LTD665.9K$41.8M−$21.7MCut−$22.4M
Bank Pictet & Cie (Europe) AG641.2K$40.2M−$5.04MAdded$25.5M
KLP KAPITALFORVALTNING AS636.8K$40M−$19.9MCut−$18.3M
TUDOR INVESTMENT CORP ET AL632.6K$39.7M−$20.6MCut−$30.2M
AustralianSuper Pty Ltd628.4K$39.4M−$20.5MCut−$78.5M
BRADLEY FOSTER & SARGENT INC/CT627.5K$39.4M−$16.1MCut−$7.63M
Rhenman & Partners Asset Management AB625K$39.2M−$14.1MCut−$1.9M
Jump Financial, LLC618.7K$38.8M−$14.6MCut−$4.02M
PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO605.2K$38M−$19.7MCut−$21.8M
State of Tennessee, Department of Treasury595.9K$37.4M−$14.6MCut−$7.12M
Saudi Central Bank593.5K$37.2M−$17.6MCut−$14.2M
E. Ohman J:or Asset Management AB593.2K$37.2M−$18.4MCut−$16.6M
Mawer Investment Management Ltd.589.7K$37M−$1.51MAdded$32.6M
POLEN CAPITAL MANAGEMENT LLC579.7K$36.4M−$18.9MCut−$346.9M
Quantinno Capital Management LP574.5K$36M−$18.7MCut−$28.8M
DSM CAPITAL PARTNERS LLC564.3K$35.4M−$154KAdded$35M
US BANCORP \DE\561.7K$35.2M−$11.4MAdded$1.91M
Integral Health Asset Management, LLC550K$34.5M−$7.33MAdded$13.1M
MKP Capital Management, L.L.C.549K$34.4MNew
NATIXIS540.1K$33.9M−$17.6MCut−$18.9M
FIFTH THIRD BANCORP532.9K$33.4M−$9.86MAdded$4.59M
DNB Asset Management AS527.3K$33.1M−$12.2MCut−$2.63M
IMC-Chicago, LLC520.4K$32.7M−$2.32MAdded$25.9M
Rock Springs Capital Management LP515.3K$32.3M−$13MCut−$5.71M
State of New Jersey Common Pension Fund D504.5K$31.7M−$16.4MCut−$16.4M
Migdal Insurance & Financial Holdings Ltd.500K$31.4MNew
GATEWAY INVESTMENT ADVISERS LLC499.5K$31.3M−$16.3MCut−$24M
VICTORY CAPITAL MANAGEMENT INC497K$31.2M−$15.7MCut−$14.7M
Fiera Capital Corp496.4K$31.2M−$10.5MAdded$497.1K
NOMURA ASSET MANAGEMENT INTERNATIONAL INC.494.5K$31M−$16.1MCut−$17.1M
Aquatic Capital Management LLC490.6K$30.8M−$1.11MAdded$27.5M
United Super Pty Ltd in its capacity as Trustee for the Construction & Building Unions Superannuation Fund489.6K$30.7M−$3.52MAdded$20.4M
Hudson Bay Capital Management LP484K$30.4M−$15.8MCut−$15.8M
ASR Vermogensbeheer N.V.483.9K$30.4M−$15.6MCut−$15.2M
Gotham Asset Management, LLC483K$30.3M−$5.19MAdded$15.1M
Associated Banc-Corp480.4K$30.1M−$12.2MCut−$5.5M
Cetera Investment Advisers473.4K$29.7M−$14.7MCut−$13.2M
OFI INVEST ASSET MANAGEMENT538.8K$29.4M−$8.99MAdded$2.18M
Resona Asset Management Co.,Ltd.464.1K$29.1M−$14.8MCut−$14.3M
ANCHOR CAPITAL ADVISORS LLC463.7K$29.1M−$15MCut−$14.7M
FJARDE AP-FONDEN /FOURTH SWEDISH NATIONAL PENSION FUND461.4K$29M−$9.28MAdded$1.82M
Fisher Asset Management, LLC450.6K$28.3M−$14.7MCut−$843.1M
Y-Intercept (Hong Kong) Ltd450.3K$28.3M−$2.04MAdded$22.3M
Parkman Healthcare Partners LLC448.8K$28.2M−$14.6MCut−$19.6M
TORONTO DOMINION BANK448.2K$28.1M−$14.6MCut−$69.5M
OSTERWEIS CAPITAL MANAGEMENT INC442.2K$27.7M−$8.79MAdded$2.05M
ABN AMRO Bank N.V.438.3K$27.7M−$14MCut−$26.8M
ING GROEP NV438.3K$27.5M−$4.77MAdded$13.6M
TEACHER RETIREMENT SYSTEM OF TEXAS435.8K$27.3M−$14.2MCut−$25.4M
DKRT Investments Corp.435K$27.3MNew
VOYA INVESTMENT MANAGEMENT LLC422.4K$26.5M−$13.8MCut−$180.5M
Focus Partners Wealth411.5K$25.9M−$13.4MCut−$29.7M
ARIZONA STATE RETIREMENT SYSTEM406.2K$25.5M−$13.2MCut−$14.6M
Czech National Bank403.9K$25.3M−$12.7MCut−$11.9M
ATALANTA SOSNOFF CAPITAL, LLC402.7K$25.3M−$13.1MCut−$36.9M
Creative Planning397.9K$25M−$10.4MCut−$5.39M
Tredje AP-fonden396.1K$24.9M−$12.9MCut−$84.5M
OSAIC HOLDINGS, INC.393.6K$24.7M−$12.8MCut−$16.2M
STATE OF MICHIGAN RETIREMENT SYSTEM387.4K$24.3M−$12.6MCut−$12.7M
Skandinaviska Enskilda Banken AB (publ)387.3K$24.3M−$12.6MCut−$246M
Trexquant Investment LP385.5K$24.2M−$10.4MCut−$6.16M
Caption Management, LLC374.4K$23.5M−$2.97MAdded$14.8M
CIBC Asset Management Inc371.6K$23.3M−$11.9MCut−$11.6M

Who left

Positions as of Q1 2026. 13F filings arrive up to 45 days after quarter-end and omit shorts. Values are quarter-end marks, as filed. Estimated mark is the price effect on shares still held — not realized P&L or investment advice.