Boston Scientific Corp (BSX) Ownership

97.72 ↑0.00 (0.00%)

As of December 31, 1969, 7:00pm EST.

Institutions
Mutual Funds

Institutional Ownership

BlackRock Inc is the biggest individual institutional holder of Boston Scientific Corp (BSX), owning a total of 146.7 million shares. Combined, the top 31 institutional holders of BSX own 68.38% of the company with a total of 1 billion shares.

In the latest ownership report on June 30th 2025, the top 31 institutional holders decreased their combined ownership of BSX by 21.8 million shares. 9 institutions bought 14,094,704 total additional shares and increased their ownership by an average of 4.05%. However 11 institutions sold 35,904,055 total shares and decreased their ownership by an average of 7.85%.

Overall this is a negative sign as the number of shares owned by the top 20 institutional holders of Boston Scientific Corp decreased by a net total of -21,809,351 in the latest quarter.

Institution Ownership Chart

Latest Institutional Ownership Changes

Owner	Percent Owned	Percent Change	Shares Owned	Share Change	Date Reported
BlackRock Inc	9.900%	3.541%	146,687,740	5,016,674	2025-06-30
Vanguard Group Inc	9.255%	1.891%	137,134,110	2,545,381	2025-06-30
FMR Inc	7.310%	-15.775%	108,310,577	-20,286,637	2025-06-30
State Street Corp	4.400%	1.106%	65,191,864	713,379	2025-06-30
PRIMECAP Management Company	2.339%	-5.026%	34,662,722	-1,834,224	2025-06-30
Bank of America Corp	2.284%	7.251%	33,845,119	2,288,065	2025-06-30
Wellington Management Company LLP	2.203%	-1.652%	32,649,465	-548,377	2025-06-30
Geode Capital Management, LLC	2.188%	1.958%	32,424,982	622,602	2025-06-30
Capital World Investors	1.925%	-0.119%	28,524,768	-33,953	2025-06-30
JPMorgan Chase & Co	1.732%	-18.599%	25,659,722	-5,862,792	2025-06-30
Morgan Stanley - Brokerage Accounts	1.368%	6.444%	20,263,664	1,226,748	2025-06-30
Bollard Group LLC	1.355%	-2.008%	20,079,443	-411,383	2025-06-30
NORGES BANK	1.313%	-1.394%	19,457,562	-275,111	2025-06-30
Amvescap Plc.	1.137%	1.363%	16,851,518	226,578	2025-06-30
DZ BANK AG Deutsche Zentral-Genossenschaftsbank Fr	1.121%	-6.361%	16,615,529	-1,128,735	2025-06-30
Northern Trust Corp	0.963%	-0.197%	14,274,448	-28,176	2025-06-30
Goldman Sachs Group Inc	0.940%	0.037%	13,934,981	5,149	2025-06-30
Massachusetts Financial Services Company	0.868%	-22.168%	12,859,158	-3,662,461	2025-06-30
UBS Asset Mgmt Americas Inc	0.861%	12.833%	12,750,070	1,450,128	2025-06-30
HHG PLC	0.821%	-13.097%	12,157,715	-1,832,206	2025-06-30

Top Institutions

Owner	Percent Owned	Percent Change	Shares Owned	Share Change	Date Reported
BlackRock Inc	9.900%	3.541%	146,687,740	5,016,674	2025-06-30
Vanguard Group Inc	9.255%	1.891%	137,134,110	2,545,381	2025-06-30
FMR Inc	7.310%	-15.775%	108,310,577	-20,286,637	2025-06-30
State Street Corp	4.400%	1.106%	65,191,864	713,379	2025-06-30
State Street Corporation	4.260%	0.632%	62,728,259	393,653	2024-03-31
PRIMECAP Management Company	2.339%	-5.026%	34,662,722	-1,834,224	2025-06-30
Bank of America Corp	2.284%	7.251%	33,845,119	2,288,065	2025-06-30
Wellington Management Company LLP	2.203%	-1.652%	32,649,465	-548,377	2025-06-30
Geode Capital Management, LLC	2.188%	1.958%	32,424,982	622,602	2025-06-30
Capital World Investors	1.925%	-0.119%	28,524,768	-33,953	2025-06-30
JPMorgan Chase & Co	1.732%	-18.599%	25,659,722	-5,862,792	2025-06-30
Citadel Advisors Llc	1.439%	36.877%	21,156,222	5,699,874	2023-09-30
Morgan Stanley - Brokerage Accounts	1.368%	6.444%	20,263,664	1,226,748	2025-06-30
Bollard Group LLC	1.355%	-2.008%	20,079,443	-411,383	2025-06-30
NORGES BANK	1.313%	-1.394%	19,457,562	-275,111	2025-06-30
Amvescap Plc.	1.137%	1.363%	16,851,518	226,578	2025-06-30
DZ BANK AG Deutsche Zentral-Genossenschaftsbank Fr	1.121%	-6.361%	16,615,529	-1,128,735	2025-06-30
Franklin Resources Inc	1.118%	5.299%	16,539,488	832,386	2024-12-31
Viking Global Investors LP	1.129%	10.297%	16,162,921	1,508,967	2022-09-30
Artisan Partners Limited Partnership	0.995%	-9.345%	14,665,656	-1,511,854	2024-06-30
Northern Trust Corp	0.963%	-0.197%	14,274,448	-28,176	2025-06-30
Goldman Sachs Group Inc	0.940%	0.037%	13,934,981	5,149	2025-06-30
Legal & General Group PLC	0.915%	-3.165%	13,482,107	-440,666	2024-09-30
Vontobel Asset Management Inc	0.895%	1.970%	12,866,414	248,625	2022-12-31
Massachusetts Financial Services Company	0.868%	-22.168%	12,859,158	-3,662,461	2025-06-30
UBS Asset Mgmt Americas Inc	0.861%	12.833%	12,750,070	1,450,128	2025-06-30
Lazard Asset Management LLC	0.876%	-0.896%	12,539,719	-113,333	2022-09-30
Amundi	0.831%	2.593%	12,308,715	311,034	2025-03-31
HHG PLC	0.821%	-13.097%	12,157,715	-1,832,206	2025-06-30
Farallon Capital Management, L.L.C.	0.848%	-19.246%	12,151,257	-2,896,000	2022-09-30
Bank of New York Mellon Corp	0.793%	-5.634%	11,754,392	-701,803	2025-03-31

Mutual Fund Ownership

Vanguard US Total Market Shares ETF is the biggest individual fund holder of Boston Scientific Corp (BSX), owning a total of 46.6 million shares. Combined, the top 42 mutual fund holders of BSX own 41.66% of the company with a total of 614.5 million shares.

In the latest ownership report on August 31st 2025, the top 42 fund holders increased their combined ownership of BSX by 224 thousand shares. 2 funds bought 236,217 total additional shares and increased their ownership by an average of 0.70%. However 1 funds sold 12,212 total shares and decreased their ownership by an average of 0.15%.

Overall this is a positive sign as the number of shares owned by the top 20 mutual funds holding Boston Scientific Corp increased by a net total of 224,005 in the latest report.

Mutual Funds Chart

Latest Mutual Fund Ownership Changes

Owner	Percent Owned	Percent Change	Shares Owned	Share Change	Date Reported
SPDR® S&P 500® ETF	1.207%	1.245%	17,877,447	219,857	2025-08-31
iShares Core S&P 500 ETF	1.201%	0.000%	17,802,045	0	2025-08-31
The Health Care Select Sector SPDR® ETF	0.682%	0.162%	10,102,183	16,360	2025-08-31
State St S&P 500® Indx SL Cl III	0.533%	-0.154%	7,896,939	-12,212	2025-08-31

Top Mutual Funds

Owner	Percent Owned	Percent Change	Shares Owned	Share Change	Date Reported
Vanguard US Total Market Shares ETF	3.160%	0.134%	46,628,311	62,575	2024-09-30
Vanguard Total Stock Mkt Idx Inv	3.137%	-2.265%	46,475,591	-1,077,285	2025-07-31
Vanguard Instl Ttl Stck Mkt Idx Tr	3.033%	1.993%	44,427,333	868,195	2023-03-31
Vanguard 500 Index Investor	2.472%	-12.778%	36,621,828	-5,364,891	2025-07-31
Vanguard PRIMECAP Inv	1.584%	-6.577%	23,474,689	-1,652,625	2025-06-30
Fidelity 500 Index	1.266%	0.043%	18,753,474	8,056	2025-07-31
SPDR® S&P 500 ETF	1.242%	-1.444%	18,328,475	-268,460	2025-03-31
Capital Group Growth Fnd of Amer Comp	1.227%	2.753%	18,176,584	486,911	2025-06-30
American Funds Growth Fund of Amer A	1.227%	2.753%	18,176,584	486,911	2025-06-30
SPDR® S&P 500® ETF	1.207%	1.245%	17,877,447	219,857	2025-08-31
SPDR® S&P 500® ETF Trust	1.206%	-0.521%	17,842,649	-93,528	2025-03-31
iShares Core S&P 500 ETF	1.201%	0.000%	17,802,045	0	2025-08-31
SPDR® S&P 500 ETF Trust	1.178%	0.227%	17,317,872	39,150	2024-04-30
Fidelity® 500 Index	1.165%	0.640%	17,062,309	108,579	2023-11-30
Vanguard Growth Index Investor	1.056%	0.368%	15,650,189	57,389	2025-07-31
Fidelity® Select Medical Tech and Devcs	0.997%	-3.947%	14,600,000	-600,000	2023-10-31
Vanguard Health Care Inv	0.947%	4.187%	14,035,501	564,091	2025-06-30
Select Medical Tech and Devcs	0.956%	-4.110%	14,000,000	-600,000	2023-11-30
Select Health Care	0.819%	0.418%	12,000,000	50,000	2023-10-31
Fidelity® Select Health Care	0.819%	0.418%	12,000,000	50,000	2023-10-31
MFS Large Cap Value (SMA)	0.766%	26,228,600.000%	11,016,070	11,016,028	2023-06-30
Health Care Select Sector SPDR® ETF	0.727%	-0.130%	10,681,447	-13,860	2024-04-30
The Health Care Select Sector SPDR® ETF	0.682%	0.162%	10,102,183	16,360	2025-08-31
Fidelity Contrafund	0.643%	11.613%	9,520,051	990,554	2025-07-31
MFS Large Cap Value Equity	0.611%	-18.767%	8,948,667	-2,067,403	2023-09-30
Vanguard Institutional Index I	0.604%	-1.103%	8,943,521	-99,715	2025-07-31
JPMorgan US Equity L	0.616%	-0.551%	8,828,277	-48,950	2022-11-30
BGF World Healthscience A2	0.555%	-2.841%	8,195,651	-239,620	2025-01-31
MFS Value A	0.545%	-10.218%	7,990,497	-909,361	2023-11-30
State St S&P 500® Indx SL Cl III	0.533%	-0.154%	7,896,939	-12,212	2025-08-31
Capital Group New Perspective Comp	0.516%	0.000%	7,641,192	0	2025-06-30
American Funds New Perspective A	0.516%	0.000%	7,641,192	0	2025-06-30
Fidelity Advisor® Health Care I	0.519%	-3.308%	7,600,000	-260,000	2023-11-30
Fidelity Select Health Care	0.511%	-4.906%	7,560,000	-390,000	2025-02-28
Fidelity Advisor Health Care I	0.498%	-2.918%	7,320,000	-220,000	2024-03-31
MFS Growth Equity	0.458%	-13.895%	6,789,573	-1,095,668	2025-06-30
MFS Growth B	0.458%	-6.337%	6,789,573	-459,328	2025-06-30
Fidelity Blue Chip Growth	0.440%	-2.249%	6,519,721	-150,000	2025-07-31
Janus Henderson Enterprise D	0.416%	-5.080%	6,166,990	-330,040	2025-05-31
Fidelity Select Medical Tech and Devcs	0.391%	-4.605%	5,800,000	-280,000	2025-06-30
Vanguard Institutional 500 Index Trust	0.381%	0.000%	5,649,153	5,649,153	2025-07-31
Janus Inst Mid Cap Growth CF	0.380%	-20.768%	5,634,415	-1,476,862	2025-06-30