PRIMECAP MANAGEMENT CO/CA/

Position in BSX — Boston Scientific Corp

CIK 763212 PASADENA, CA

Back to BSX Full portfolio

Position in BSX

as of Mar 31, 2026 · filed May 11, 2026 Compact

Position Value

$2,041,243,318

-$923,777,826 QoQ

Shares Held

32,529,774

+4.6% QoQ

Ownership

2.19%

of shares outstanding

% of Portfolio

1.68%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2020

25 quarters on record

Voting authority Sole 98.76486077032075.ToString("F0")% Shared 0.ToString("F0")% None 1.235139229679247.ToString("F0")%

Common Shares in BSX Over Time

Shares Held

Position Value (USD)

Position in Medical Devices

Healthcare · as of Mar 31, 2026

PRIMECAP MANAGEMENT CO/CA/ holds $3,621,368,766 across 15 Medical Devices names. BSX ranks #1 (56.4% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	BSX	Boston Scientific Corp This page	32,529,774	$2,041,243,318
2	GKOS	GLAUKOS Corp	3,370,628	$362,881,810
3	ZBH	Zimmer Biomet Holdings, Inc.	3,907,150	$353,284,503
4	EW	Edwards Lifesciences Corp	3,422,791	$274,097,103
5	LIVN	LivaNova PLC	4,207,052	$267,400,225
6	SYK	Stryker Corp	526,672	$173,059,152
7	ABT	Abbott Laboratories	762,220	$78,257,127
8	BRKR	Bruker Corp	857,600	$30,976,512

All Filings in BSX

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25 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$2,041,243,318	32,529,774	+4.6%	Shares	Sole	2026-05-11
2025-12-31	$2,965,021,144	31,096,184	-6.1%	Shares	Sole	2026-02-11
2025-09-30	$3,231,757,437	33,102,094	-4.5%	Shares	Sole	2025-11-12
2025-06-30	$3,723,122,970	34,662,722	-5.0%	Shares	Sole	2025-08-11
2025-03-31	$3,681,811,912	36,496,946	-1.2%	Shares	Sole	2025-05-09
2024-12-31	$3,298,557,767	36,929,666	-2.4%	Shares	Sole	2025-02-10
2024-09-30	$3,169,860,700	37,826,500	-0.3%	Shares	Sole	2024-11-08
2024-06-30	$2,923,227,287	37,959,061	+0.0%	Shares	Sole	2024-08-09
2024-03-31	$2,599,035,575	37,947,665	+0.1%	Shares	Sole	2024-05-14
2023-12-31	$2,191,326,146	37,905,659	+1.5%	Shares	Sole	2024-02-09
2023-09-30	$1,972,352,923	37,355,169	-0.2%	Shares	Sole	2023-11-13
2023-06-30	$2,024,533,474	37,428,979	-2.3%	Shares	Sole	2023-08-11
2023-03-31	$1,917,561,296	38,328,229	+1.8%	Shares	Sole	2023-05-15
2022-12-31	$1,742,151,515	37,651,859	+0.0%	Shares	Sole	2023-02-13
2022-09-30	$1,458,196,467	37,650,309	-0.4%	Shares	Sole	2022-11-14
2022-06-30	$1,409,536,827	37,819,609	-0.3%	Shares	Sole	2022-08-11
2022-03-31	$1,679,513,073	37,920,819	-0.5%	Shares	Sole	2022-05-11
2021-12-31	$1,619,278,935	38,118,619	-3.8%	Shares	Sole	2022-02-11
2021-09-30	$1,718,561,137	39,607,309	-1.0%	Shares	Sole	2021-11-12
2021-06-30	$1,711,274,228	40,020,445	-2.4%	Shares	Sole	2021-08-10
2021-03-31	$1,585,126,941	41,012,340	+3.9%	Shares	Sole	2021-05-14
2020-12-31	$1,418,622,410	39,460,985	-2.5%	Shares	Sole	2021-02-08
2020-09-30	$1,546,699,342	40,478,915	-2.9%	Shares	Sole	2020-11-13
2020-06-30	$1,463,451,684	41,681,905	-1.5%	Shares	Sole	2020-08-13
2020-03-31	$1,380,641,375	42,312,025	—	Shares	Sole	2020-05-14
No filing history on record for this holder in this stock.