Boston Scientific BSX Institutional Ownership

NYSE BSX

$45.06 +0.67 (+1.50%)

At close: Oct 19, 2026 · 4:00 PM EDT

As of the 13F quarter ended Jun 30, 2026, 1,480 institutions held 90.53% of Boston Scientific (BSX) shares outstanding. Versus the prior quarter, institutional ownership was up 0.38 percentage points, the holder count fell by 190 and shares held were down 0.67%. The largest holder is BlackRock, Inc. with 129.68Mn shares (8.82% of outstanding).

Updated Oct 11, 2026 Boston Scientific (BSX) stock price and overview

Institutions by Trading Activity

1,480 Institutions

Increased 738 49.9%

Unchanged 133 9.0%

Reduced 609 41.1%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

90.53%

▲+0.38 pp QoQ

Shares Held by Institutions

1.33Bn

of 1.47Bn outstanding

▼-0.67% QoQ

Shares Outstanding

1.47Bn

139.27Mn held outside 13F filers

Institutional Investors

1,480

filed 13F for Jun 2026

▼-190 vs prior quarter

Net Shares Added (QoQ)

-8.95Mn

distributed since last quarter

Value of Holdings

$58.76Bn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Updated Oct 11, 2026

Boston Scientific Corp (NYSE:BSX) was reported as a holding by 1,479 institutional investors in 13F filings for the quarter ended June 30, 2026.

Together they owned 90.53% of the outstanding stock in Q2 2026, up from 90.15% a quarter earlier.
Total shares held in BSX fell 0.67% from Q1 2026; the number of holders fell 12.74% from Q2 2025.
Looking at the 1,479 holders of BSX individually, 737 added to their positions, 609 reduced their stakes and 133 left their positions unchanged.
The aggregate institutional position in Boston Scientific was 1.33Bn shares at the end of Q2 2026, down 8.96Mn from the prior quarter and up 2.35Mn from a year earlier.
BlackRock, Inc. led 13F holders of BSX with 129.68Mn shares as of June 30, 2026, or 8.82% of shares outstanding.
Among existing holders, the largest additions to Boston Scientific in Q2 2026 came from Primecap Management Co (+17.99Mn shares), Massachusetts Financial Services Co (+13.86Mn shares), Two Sigma Investments, LP (+9.95Mn shares), Arrowstreet Capital, Limited Partnership (+9.4Mn shares) and FIL Ltd (+9.12Mn shares).
Holders that trimmed the most shares of Boston Scientific in Q2 2026 while keeping a position were FMR LLC (-28.52Mn shares), Bank of America Corp (-9.73Mn shares), JPMorgan Chase & Co (-9.44Mn shares), Parnassus Investments, LLC (-6.83Mn shares) and Assenagon Asset Management S.A. (-5.88Mn shares).
According to Business Quant data, the leading holders of BSX for Q2 2026 were BlackRock, Inc. (129.68Mn shares), Vanguard Capital Management LLC (97.09Mn shares), State Street Corp (70.11Mn shares), Primecap Management Co (50.52Mn shares), FMR LLC (45.7Mn shares), Geode Capital Management, LLC (33.44Mn shares), Vanguard Portfolio Management LLC (29.79Mn shares), D. E. Shaw & Co., Inc. (25.46Mn shares), Massachusetts Financial Services Co (24.86Mn shares) and JPMorgan Chase & Co (23.91Mn shares).

Form 13F Holdings

1,482 Institutional Holders

Report period 30 Jun, 2026

Total shares held 1.33Bn

Of outstanding 90.53%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	BlackRock, Inc.	0002012383	129,680,916	8.82%	▼2,141,121	-1.62%	$5.53Bn
2	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	97,087,553	6.60%	▲675,985	+0.70%	$4.14Bn
3	State Street Corp	0000093751	70,111,196	4.77%	▲2,124,349	+3.12%	$2.99Bn
4	PRIMECAP MANAGEMENT CO/CA/	0000763212	50,520,914	3.44%	▲17,991,140	+55.31%	$2.16Bn
5	FMR LLC	0000315066	45,702,845	3.11%	▼28,523,550	-38.43%	$1.95Bn
6	GEODE CAPITAL MANAGEMENT, LLC	0001214717	33,440,102	2.27%	▲154,345	+0.46%	$1.42Bn
7	VANGUARD PORTFOLIO MANAGEMENT LLC	0002100121	29,792,794	2.03%	▼3,417	-0.01%	$1.27Bn
8	D. E. Shaw & Co., Inc.	0001009207	25,457,409	1.73%	▲1,145,057	+4.71%	$1.09Bn
9	MASSACHUSETTS FINANCIAL SERVICES CO /MA/	0000912938	24,859,191	1.69%	▲13,862,619	+126.06%	$1.50Bn
10	Jpmorgan Chase & Co	0000019617	23,907,838	1.63%	▼9,442,319	-28.31%	$1.04Bn
11	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	0001164508	23,293,913	1.58%	▲9,402,245	+67.68%	$994.18Mn
12	NORGES BANK	0001374170	21,170,029	1.44%	▲21,170,029	0.00%	$903.54Mn
13	TWO SIGMA INVESTMENTS, LP	0001179392	19,359,023	1.32%	▲9,947,792	+105.70%	$826.24Mn
14	Morgan Stanley	0000895421	18,947,147	1.29%	▼3,319,517	-14.91%	$808.66Mn
15	Jupiter Topco LLC	0002146052	18,822,853	1.28%	▲18,822,853	0.00%	$803.36Mn
16	Bollard Group LLC	0001556218	18,420,720	1.25%	▼111,453	-0.60%	$786.20K
17	Goldman Sachs Group Inc	0000886982	16,954,342	1.15%	▼1,937,282	-10.25%	$723.61Mn
18	Capital World Investors	0001422849	16,812,257	1.14%	▲1,502,519	+9.81%	$717.60Mn
19	UBS Group AG	0001610520	16,352,420	1.11%	▲1,527,758	+10.31%	$697.92Mn
20	WELLINGTON MANAGEMENT GROUP LLP	0000902219	15,301,828	1.04%	▼3,531,578	-18.75%	$653.08Mn

Showing 1 to 20 of 1,482 holders