BOSTON SCIENTIFIC CORP (BSX) — Institutional Holders, Q2 2026

1,489 institutional investment managers reported a BSX position on SEC Form 13F-HR for the quarter ended June 30, 2026, with a combined reported value of $57.3B. Every filer is listed below, ranked by position value, 100 per page; this page shows ranks 1 to 100. Put and call option positions are excluded, and a firm filing several lots or share classes is shown once with its total.

← BSX stock profile

BSX in Q2 2026: what funds did

Funds that filed a 13F for both Q1 2026 and Q2 2026, by what they did with the common stock. Share counts are adjusted for any split between the two quarters; dollar figures are the change in shares at this quarter’s price.

New positions

135

Added to

587

Trimmed

618

Sold out

327

Biggest buyers

PRIMECAP MANAGEMENTAdded · +17,991,140 sh+$767.9M
MASSACHUSETTS FINANCIAL SERVICESAdded · +13,862,619 sh+$591.7M
TWO SIGMA INVESTMENTSAdded · +9,947,792 sh+$424.6M
ARROWSTREET CAPITAL, LIMITED PARTNERSHIPAdded · +9,402,245 sh+$401.3M
FIL LtdAdded · +9,117,938 sh+$389.2M

Biggest sellers

FMRTrimmed · -28,523,550 sh-$1.2B
BANK OF AMERICATrimmed · -9,728,863 sh-$415.2M
JPMORGAN CHASETrimmed · -9,442,319 sh-$403.0M
EDGEWOOD MANAGEMENTSold out · -7,629,399 sh-$325.6M
PARNASSUS INVESTMENTSTrimmed · -6,829,021 sh-$291.5M

BSX 13F holders ranked 1–100 of 1,489

Institutional investors reporting a position in BOSTON SCIENTIFIC CORP on SEC Form 13F-HR for Q2 2026, ranked by reported value.
#	Institution	Shares	Value	% of portfolio	QoQShares vs Q1 2026
1	BlackRock#1 · 129,680,916 sh	129,680,916	$5.5B	0.08%	-1.6%
2	VANGUARD CAPITAL MANAGEMENT#2 · 97,087,553 sh	97,087,553	$4.1B	0.09%	+0.7%
3	STATE STREET#3 · 70,111,196 sh	70,111,196	$3.0B	0.09%	+3.1%
4	PRIMECAP MANAGEMENT#4 · 50,520,914 sh	50,520,914	$2.2B	1.27%	+55.3%
5	FMR#5 · 45,702,845 sh	45,702,845	$2.0B	0.08%	-38.4%
6	MASSACHUSETTS FINANCIAL SERVICES#6 · 24,859,191 sh	24,859,191	$1.5B	0.48%	+126.1%
7	GEODE CAPITAL MANAGEMENT#7 · 33,440,102 sh	33,440,102	$1.4B	0.08%	+0.5%
8	VANGUARD PORTFOLIO MANAGEMENT#8 · 29,792,794 sh	29,792,794	$1.3B	0.06%	0.0%
9	D. E. Shaw#9 · 25,457,409 sh	25,457,409	$1.1B	0.52%	+4.7%
10	JPMORGAN CHASE#10 · 23,907,838 sh	23,907,838	$1.0B	0.06%	-28.3%
11	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP#11 · 23,293,913 sh	23,293,913	$994.2M	0.44%	+67.7%
12	NORGES BANK#12 · 21,170,029 sh	21,170,029	$903.5M	0.09%	—
13	TWO SIGMA INVESTMENTS#13 · 19,359,023 sh	19,359,023	$826.2M	0.60%	+105.7%
14	MORGAN STANLEY#14 · 18,947,147 sh	18,947,147	$808.7M	0.04%	-14.9%
15	Jupiter Topco#15 · 18,822,853 sh	18,822,853	$803.4M	0.33%	—
16	Bollard Group#16 · 18,420,720 sh	18,420,720	$786.2M	23.93%	-0.6%
17	GOLDMAN SACHS GROUP#17 · 16,954,342 sh	16,954,342	$723.6M	0.06%	-10.3%
18	Capital World Investors#18 · 16,812,257 sh	16,812,257	$717.6M	0.08%	+9.8%
19	UBS Group AG#19 · 16,352,420 sh	16,352,420	$697.9M	0.09%	+10.3%
20	WELLINGTON MANAGEMENT GROUP LLP#20 · 15,301,828 sh	15,301,828	$653.1M	0.11%	-18.8%
21	Amundi#21 · 14,296,121 sh	14,296,121	$610.2M	0.15%	+1.2%
22	Capital Research Global Investors#22 · 14,180,571 sh	14,180,571	$605.3M	0.08%	+100.3%
23	Invesco Ltd.#23 · 13,800,748 sh	13,800,748	$589.0M	0.05%	+52.5%
24	FRANKLIN RESOURCES#24 · 13,772,323 sh	13,772,323	$587.8M	0.13%	-5.0%
25	UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AME#25 · 13,091,481 sh	13,091,481	$558.7M	0.10%	-3.1%
26	BANK OF AMERICA#26 · 13,027,783 sh	13,027,783	$556.0M	0.04%	-42.8%
27	NORTHERN#27 · 12,964,638 sh	12,964,638	$553.3M	0.06%	-3.1%
28	FIL Ltd#28 · 12,332,054 sh	12,332,054	$526.3M	0.38%	+283.7%
29	JANE STREET GROUP#29 · 12,087,991 sh	12,087,991	$515.9M	0.04%	+199.8%
30	FARALLON CAPITAL MANAGEMENT#30 · 10,521,184 sh	10,521,184	$449.0M	2.07%	+40.8%
31	Legal & General Group Plc#31 · 10,119,264 sh	10,119,264	$431.9M	0.09%	-4.5%
32	AQR CAPITAL MANAGEMENT#32 · 9,681,750 sh	9,681,750	$413.2M	0.14%	+84.8%
33	CANADA PENSION PLAN INVESTMENT BOARD#33 · 9,262,404 sh	9,262,404	$395.3M	0.22%	+15.3%
34	DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt#34 · 9,227,707 sh	9,227,707	$393.8M	0.30%	-30.2%
35	CHARLES SCHWAB INVESTMENT MANAGEMENT#35 · 9,223,151 sh	9,223,151	$393.6M	0.05%	+0.6%
36	Qube Research & Technologies Ltd#36 · 8,943,771 sh	8,943,771	$381.7M	0.35%	+60.6%
37	Nuveen#37 · 8,695,119 sh	8,695,119	$371.1M	0.09%	-25.9%
38	VANGUARD FIDUCIARY#38 · 8,345,428 sh	8,345,428	$356.2M	0.08%	-0.4%
39	ROYAL BANK OF CANADA#39 · 8,100,653 sh	8,100,653	$345.7M	0.05%	+29.1%
40	Bank of New York Mellon#40 · 7,943,553 sh	7,943,553	$339.0M	0.06%	-16.8%
41	BNP PARIBAS FINANCIAL MARKETS#41 · 7,620,469 sh	7,620,469	$325.2M	0.11%	+49.4%
42	PRICE T ROWE ASSOCIATES#42 · 7,070,412 sh	7,070,412	$301.8M	0.03%	-10.2%
43	DEUTSCHE BANK AG\#43 · 5,957,053 sh	5,957,053	$254.2M	0.07%	-10.5%
44	MAVERICK CAPITAL LTD#44 · 5,937,553 sh	5,937,553	$253.4M	2.24%	+41.5%
45	Ensign Peak Advisors#45 · 5,881,367 sh	5,881,367	$251.0M	0.41%	+30.5%
46	DIMENSIONAL FUND ADVISORS#46 · 5,824,298 sh	5,824,298	$248.6M	0.05%	-4.5%
47	BNP Paribas Asset Management Holding S.A.#47 · 5,380,866 sh	5,380,866	$229.7M	0.23%	-22.8%
48	LAZARD ASSET MANAGEMENT#48 · 5,343,777 sh	5,343,777	$228.1M	0.35%	+9.5%
49	AMERIPRISE FINANCIAL#49 · 5,134,220 sh	5,134,220	$219.1M	0.04%	-7.9%
50	Clearbridge Investments#50 · 5,130,774 sh	5,130,774	$219.0M	0.18%	+125.1%
51	CITADEL ADVISORS#51 · 4,987,748 sh	4,987,748	$212.9M	0.02%	+18.3%
52	MILLENNIUM MANAGEMENT#52 · 5,437,567 sh	5,437,567	$210.7M	0.08%	+25.4%
53	Vontobel Holding Ltd.#53 · 4,871,518 sh	4,871,518	$207.9M	—	-38.9%
54	SCHRODER INVESTMENT MANAGEMENT GROUP#54 · 4,708,211 sh	4,708,211	$200.9M	0.14%	-35.1%
55	BARCLAYS PLC#55 · 4,584,260 sh	4,584,260	$195.7M	0.04%	-8.8%
56	1832 Asset Management L.P.#56 · 4,556,876 sh	4,556,876	$194.5M	0.10%	-37.2%
57	Swiss National Bank#57 · 4,191,800 sh	4,191,800	$178.9M	0.09%	-3.7%
58	Assenagon Asset Management S.A.#58 · 4,173,559 sh	4,173,559	$178.1M	—	-58.5%
59	National Pension Service#59 · 3,959,598 sh	3,959,598	$169.0M	0.11%	+7.1%
60	SG Americas Securities#60 · 3,785,401 sh	3,785,401	$161.6M	0.09%	+306.5%
61	Mitsubishi UFJ Asset Management , Ltd.#61 · 3,617,472 sh	3,617,472	$154.4M	0.09%	+7.5%
62	HSBC PLC#62 · 3,533,722 sh	3,533,722	$150.6M	0.06%	+3.9%
63	Ninety One UK Ltd#63 · 3,501,985 sh	3,501,985	$149.5M	—	-52.1%
64	Allianz Asset Management GmbH#64 · 2,400,485 sh	2,400,485	$149.3M	0.13%	+0.3%
65	Sumitomo Mitsui#65 · 3,427,875 sh	3,427,875	$146.3M	0.08%	+0.1%
66	Employees Provident Fund Board#66 · 3,358,700 sh	3,358,700	$143.3M	0.82%	+57.3%
67	Vanguard Global Advisers#67 · 3,337,790 sh	3,337,790	$142.5M	0.07%	+2.9%
68	VOLORIDGE INVESTMENT MANAGEMENT#68 · 3,275,326 sh	3,275,326	$139.8M	0.59%	+203.8%
69	Man Group plc#69 · 3,225,164 sh	3,225,164	$137.7M	0.22%	-13.3%
70	CAISSE DE DEPOT ET PLACEMENT DU QUEBEC#70 · 3,120,394 sh	3,120,394	$133.2M	0.19%	+110.1%
71	Alecta Tjanstepension Omsesidigt#71 · 3,117,000 sh	3,117,000	$133.0M	0.56%	+8.8%
72	Mirova US#72 · 3,101,478 sh	3,101,478	$132.4M	1.42%	+40.8%
73	abrdn plc#73 · 3,066,626 sh	3,066,626	$130.9M	0.18%	+10.9%
74	WELLS FARGO & COMPANY#74 · 3,051,613 sh	3,051,613	$130.2M	0.02%	+2.7%
75	Russell Investments Group, Ltd.#75 · 2,895,696 sh	2,895,696	$123.7M	0.11%	+24.9%
76	VANGUARD ASSET MANAGEMENT, Ltd#76 · 2,873,191 sh	2,873,191	$122.6M	0.08%	+11.9%
77	PUBLIC SECTOR PENSION INVESTMENT BOARD#77 · 2,804,896 sh	2,804,896	$119.7M	0.31%	+35.0%
78	DekaBank Deutsche Girozentrale#78 · 1,844,793 sh	1,844,793	$115.7M	0.20%	0.0%
79	MANUFACTURERS LIFE INSURANCE COMPANY, THE#79 · 2,702,583 sh	2,702,583	$115.3M	0.09%	+2.8%
80	RHUMBLINE ADVISERS#80 · 2,641,843 sh	2,641,843	$112.8M	0.09%	-1.2%
81	NORDEA INVESTMENT MANAGEMENT AB#81 · 2,610,440 sh	2,610,440	$110.9M	0.09%	+96.3%
82	CITIGROUP#82 · 2,582,561 sh	2,582,561	$110.2M	0.04%	+63.8%
83	Rathbones Group PLC#83 · 2,539,901 sh	2,539,901	$108.4M	0.40%	-20.1%
84	MARSHALL WACE, LLP#84 · 2,414,223 sh	2,414,223	$103.0M	0.08%	-33.1%
85	RENAISSANCE TECHNOLOGIES#85 · 2,412,005 sh	2,412,005	$102.9M	0.14%	-23.5%
86	Temasek (Private) Ltd#86 · 2,399,426 sh	2,399,426	$102.4M	0.27%	0.0%
87	Pictet Asset Management Holding SA#87 · 2,393,080 sh	2,393,080	$102.2M	0.10%	-53.3%
88	Unisphere Establishment#88 · 2,387,800 sh	2,387,800	$101.9M	0.87%	-14.8%
89	MILFORD FUNDS LTD#89 · 2,169,484 sh	2,169,484	$92.6M	1.51%	-1.8%
90	ALLIANCEBERNSTEIN L.P.#90 · 1,455,619 sh	1,455,619	$91.3M	0.03%	-10.5%
91	Neuberger Berman Group#91 · 2,126,406 sh	2,126,406	$90.8M	0.06%	-69.9%
92	CALIFORNIA PUBLIC EMPLOYEES RETIREMENT SYSTEM#92 · 2,047,848 sh	2,047,848	$87.4M	0.05%	-9.4%
93	Phoenix Financial Ltd.#93 · 1,962,730 sh	1,962,730	$83.8M	0.57%	+26.6%
94	RAYMOND JAMES FINANCIAL#94 · 1,923,305 sh	1,923,305	$82.1M	0.02%	-36.5%
95	STIFEL FINANCIAL#95 · 1,760,990 sh	1,760,990	$75.2M	0.06%	-11.0%
96	NEW YORK STATE COMMON RETIREMENT FUND#96 · 1,731,953 sh	1,731,953	$73.9M	0.09%	-4.5%
97	FIRST MANHATTAN#97 · 1,697,334 sh	1,697,334	$72.4M	0.18%	-65.4%
98	PRINCIPAL FINANCIAL GROUP#98 · 1,675,210 sh	1,675,210	$71.5M	0.04%	-0.7%
99	ADAGE CAPITAL PARTNERS GP, L.L.C.#99 · 1,670,022 sh	1,670,022	$71.3M	0.10%	-64.0%
100	Banque Transatlantique SA#100 · 914,874 sh	914,874	$71.3M	1.53%	+14.5%

Funds that sold out of BSX in Q2 2026 (327)

Held BSX at the end of Q1 2026 and filed a Q2 2026 13F without it. Not in the list above, because they no longer hold it. Largest prior position first.

Institutions that held BSX in Q1 2026 and reported no position in Q2 2026.
Institution	Shares sold	Value in Q1 2026
EDGEWOOD MANAGEMENT7,629,399 sh	7,629,399	$478.7M
Ilex Capital Partners (UK) LLP2,234,180 sh	2,234,180	$140.2M
Alphinity Investment Management Pty Ltd1,673,285 sh	1,673,285	$105.0M
FRED ALGER MANAGEMENT1,454,619 sh	1,454,619	$91.3M
JENNISON ASSOCIATES897,775 sh	897,775	$56.3M
Vestal Point Capital800,000 sh	800,000	$50.2M
BSN Capital Partners Ltd500,000 sh	500,000	$50.1M
SANDS CAPITAL MANAGEMENT736,109 sh	736,109	$46.2M
MKP Capital Management, L.L.C.549,000 sh	549,000	$34.4M
Migdal Insurance & Financial Ltd.500,000 sh	500,000	$31.4M
ATALANTA SOSNOFF CAPITAL402,714 sh	402,714	$25.3M
ODDO BHF ASSET MANAGEMENT SAS327,138 sh	327,138	$20.5M
BlueSpruce Investments306,134 sh	306,134	$19.2M
Catalio Capital Management299,318 sh	299,318	$18.8M
RENAISSANCE GROUP276,752 sh	276,752	$17.4M
Zurich Insurance Group Ltd272,168 sh	272,168	$17.1M
Generate Investment Management Ltd254,250 sh	254,250	$16.0M
Cornerstone Advisors239,655 sh	239,655	$15.0M
Liontrust Investment Partners LLP120,520 sh	120,520	$11.5M
Westwind Capital176,769 sh	176,769	$11.1M
ARDSLEY ADVISORY PARTNERS150,000 sh	150,000	$9.4M
CAPITOLIS LIQUID GLOBAL MARKETS147,333 sh	147,333	$9.2M
Rokos Capital Management LLP140,163 sh	140,163	$8.8M
Think Investments136,000 sh	136,000	$8.5M
GDS Wealth Management135,991 sh	135,991	$8.5M
Moran Wealth Management132,336 sh	132,336	$8.3M
AVITY INVESTMENT MANAGEMENT111,381 sh	111,381	$7.0M
FLPUTNAM INVESTMENT MANAGEMENT108,824 sh	108,824	$6.8M
BRAUN STACEY ASSOCIATES105,341 sh	105,341	$6.6M
LONE PINE CAPITAL104,655 sh	104,655	$6.6M
Exane Asset Management89,197 sh	89,197	$6.4M
DUPONT CAPITAL MANAGEMENT84,550 sh	84,550	$5.3M
BTC Capital Management84,238 sh	84,238	$5.3M
WINTON GROUP Ltd82,256 sh	82,256	$5.2M
Alberta Investment Management80,400 sh	80,400	$5.0M
DAVIDSON KEMPNER CAPITAL MANAGEMENT63,250 sh	63,250	$4.0M
DNCA FINANCE61,000 sh	61,000	$3.8M
Granite Investment Partners60,473 sh	60,473	$3.8M
Campbell & Investment Adviser56,402 sh	56,402	$3.5M
HIGHLAND CAPITAL MANAGEMENT50,000 sh	50,000	$3.1M
ECOFI INVESTISSEMENTS SA50,000 sh	50,000	$3.1M
SCHOLTZ & COMPANY47,957 sh	47,957	$3.0M
Emerald Investment Advisers42,480 sh	42,480	$2.7M
Bancreek Capital Management39,000 sh	39,000	$2.4M
Farringdon Capital, Ltd.38,104 sh	38,104	$2.4M
TIG Advisors36,602 sh	36,602	$2.3M
DRW Securities33,916 sh	33,916	$2.1M
TWIN CAPITAL MANAGEMENT33,420 sh	33,420	$2.1M
WD RUTHERFORD32,675 sh	32,675	$2.1M
BTG Pactual Asset Management US21,128 sh	21,128	$2.0M
PICTON MAHONEY ASSET MANAGEMENT28,915 sh	28,915	$1.8M
Capricorn Fund Managers Ltd28,100 sh	28,100	$1.8M
Delta Global Management28,012 sh	28,012	$1.8M
Sivia Capital Partners26,843 sh	26,843	$1.7M
Nelson Capital Management26,319 sh	26,319	$1.7M
Knights of Columbus Asset Advisors25,967 sh	25,967	$1.6M
ARGUS INVESTORS' COUNSEL25,712 sh	25,712	$1.6M
Belpointe Asset Management25,588 sh	25,588	$1.6M
Fortis Capital Advisors25,588 sh	25,588	$1.6M
INTACT INVESTMENT MANAGEMENT25,300 sh	25,300	$1.6M
Argentarii25,022 sh	25,022	$1.6M
PEAK FINANCIAL ADVISORS24,675 sh	24,675	$1.5M
VCI Wealth Management24,261 sh	24,261	$1.5M
Great Lakes Retirement22,529 sh	22,529	$1.4M
AZZAD ASSET MANAGEMENT21,858 sh	21,858	$1.4M
Lebenthal Global Advisors21,807 sh	21,807	$1.4M
Traynor Capital Management21,214 sh	21,214	$1.3M
Cinctive Capital Management20,462 sh	20,462	$1.3M
BANK OF HAWAII19,887 sh	19,887	$1.2M
EPG Wealth Management19,422 sh	19,422	$1.2M
Lombard Odier Asset Management (USA)19,398 sh	19,398	$1.2M
Fairtree Asset Management (Pty) Ltd19,191 sh	19,191	$1.2M
Dynamic Technology Lab Private Ltd19,112 sh	19,112	$1.2M
AAFMAA Wealth Management18,615 sh	18,615	$1.2M
Prudent Man Advisors18,543 sh	18,543	$1.2M
McLaughlin Asset Management18,458 sh	18,458	$1.2M
PLATINUM INVESTMENT MANAGEMENT LTD17,827 sh	17,827	$1.1M
Penobscot Investment Management Company17,212 sh	17,212	$1.1M
Kepler Cheuvreux (Suisse) SA17,109 sh	17,109	$1.1M
Park Edge Advisors16,958 sh	16,958	$1.1M
Procyon Advisors16,833 sh	16,833	$1.1M
AXA S.A.16,705 sh	16,705	$1.0M
Meridian Wealth Management16,534 sh	16,534	$1.0M
Codex Capital Asset Management L.L.C.16,500 sh	16,500	$1.0M
Alaethes Wealth16,138 sh	16,138	$1.0M
EVOKE WEALTH16,058 sh	16,058	$1.0M
SCHMIDT P J INVESTMENT MANAGEMENT15,924 sh	15,924	$999.2K
Capital Asset Advisory Services15,438 sh	15,438	$941.6K
AMERICAN ASSETS5,000 sh	5,000	$915.3K
CLOUGH CAPITAL PARTNERS L P14,350 sh	14,350	$900.5K
Neo Ivy Capital Management14,236 sh	14,236	$893.3K
LITTLE HOUSE CAPITAL13,440 sh	13,440	$843.4K
Weiss Asset Management13,080 sh	13,080	$820.8K
GILDER GAGNON HOWE12,933 sh	12,933	$811.5K
CENTRAL BANK12,026 sh	12,026	$754.6K
Baader Bank Aktiengesellschaft11,770 sh	11,770	$727.8K
Trivant Custom Portfolio Group11,370 sh	11,370	$713.5K
Baldwin Investment Management11,035 sh	11,035	$692.4K
STRATEGY ASSET MANAGERS10,876 sh	10,876	$682.5K
BURNEY10,809 sh	10,809	$678.3K

And 227 smaller positions.

Source: Form 13F-HR filings on SEC EDGAR, Q2 2026. Values are as reported by each manager at quarter end. “% of portfolio” is the position’s share of the manager’s total reported 13F value for the same quarter. “New” means the manager filed a 13F for Q1 2026 without this position; a dash means no comparison is available. Where a manager’s own filing is internally inconsistent its value is withheld and it is listed last. 13F data shows reported holdings, not recommendations.