BSX

BOSTON SCIENTIFIC CORP

Superinvestors

Institutional investors holding BSX

Investor	Fund	Weight	Shares	Value	Quarter
David Einhorn	Greenlight Capital	9.79%	32,668,000	$294.0M	2009Q4
John Armitage	Egerton Capital	5.58%	5,385,084	$513.5M	2025Q4
David Tepper	Appaloosa Management	5.44%	7,797,503	$41.6M	2011Q4
Lee Ainslie	Maverick Capital	3.76%	5,195,089	$326.0M	2026Q1
David Katz	Matrix Asset Advisors	2.37%	2,395,407	$36.7M	2007Q2
Bill Miller	Miller Value Partners	1.57%	3,008,850	$17.1M	2012Q2
Viking Global Investors	Viking Global Investors	0.64%	2,509,808	$239.3M	2025Q4
Polen Capital Management	Polen Capital Management	0.25%	579,739	$36.4M	2026Q1
William Von Mueffling	Cantillon Capital Management	0.14%	191,180	$4.7M	2005Q4
Stephen Mandel	Lone Pine Capital	0.05%	104,655	$6.6M	2026Q1
Kenneth Fisher	Fisher Asset Management	0.01%	450,603	$28.3M	2026Q1
Mairs & Power	Mairs & Power Growth Fund	0.01%	10,176	$639K	2026Q1
Meridian / ArrowMark	Meridian Contrarian Fund	0.01%	23,000	$311K	2014Q1
Bill Nygren	Oakmark Select Fund – Harris Associates	0.00%	255,935	$1.5M	2012Q4
Dodge & Cox	Dodge & Cox	0.00%	88,885	$5.6M	2026Q1

Congressional Activity

Congressional data coming soon

Insider Activity

23

Total trades

$963K

Volume

18

Buys

3

Sells

Last trade: May 20, 2026

Insider Tradeslast 90 days

Date	Insider	Type	Value
May 20, 2026	Cheryl Pegus	Buy	$203K
May 20, 2026	Cheryl Pegus	Buy	$100K

Congressional Tradeslast 90 days

Congressional trade data is being sourced and will appear here shortly.