AMAT

Boston Scientific Corp

$353.80

Closing price as of Apr 1, 2026

23 superinvestors own AMAT

Based on latest 13F filings — data is 45–90 days delayed

Investor	Fund	Weight	Shares	Value	Quarter	Activity
David Tepper	Appaloosa Management	5.44%	7,797,503	$41.6M	2011Q4	Added
John Armitage	Egerton Capital	3.92%	2,629,188	$380.0M	2023Q2	Reduced
William Von Mueffling	Cantillon Capital Management	3.46%	1,521,843	$520.2M	2026Q1	Reduced
Lee Ainslie	Maverick Capital	3.12%	1,131,276	$290.7M	2025Q4	New
Harry Burn	Sound Shore	2.29%	280,589	$72.1M	2025Q4	Reduced
Christopher Davis	Davis Selected Advisers	1.88%	1,197,102	$409.2M	2026Q1	Reduced
David Katz	Matrix Asset Advisors	1.84%	58,533	$20.0M	2026Q1	Reduced
David Einhorn	Greenlight Capital	1.22%	5,000,000	$73.5M	2015Q3	Reduced
Chase Coleman	Tiger Global Management	0.77%	895,200	$230.1M	2025Q4	Held
Third Avenue Management	Third Avenue Management	0.74%	31,297	$1.9B	2004Q3	Reduced
Chris Hohn	TCI Fund Management	0.55%	1,897,488	$172.6M	2022Q2	New
First Eagle Investment Management	First Eagle Investment Management	0.22%	1,877,588	$97.8M	2017Q3	Added
Kenneth Fisher	Fisher Asset Management	0.05%	422,055	$144.3M	2026Q1	Reduced
Meridian / ArrowMark	Meridian Contrarian Fund	0.04%	90,550	$1.3M	2015Q3	Reduced
Torray Funds	Torray Investment Partners	0.04%	1,200	$308K	2025Q4	New
Mairs & Power	Mairs & Power Growth Fund	0.03%	11,327	$2.9M	2025Q4	Held
Bill & Melinda Gates Foundation	Bill & Melinda Gates Foundation Trust	0.01%	22,800	$3.2M	2023Q3	New
Glenn Greenberg	Brave Warrior Advisors	0.01%	961	$247K	2025Q4	Held
Bill Nygren	Oakmark Select Fund – Harris Associates	0.00%	2,200	$565K	2025Q4	Held
Dodge & Cox	Dodge & Cox	0.00%	9,500	$205K	2014Q3	Reduced
Ruane Cunniff	Sequoia Fund	0.00%	13,632	$289K	2016Q1	Held
Richard Pzena	Pzena Investment Management	0.00%	1,473	$302K	2025Q3	New
Jensen Investment Management	Jensen Investment Management	0.00%	1,000	$16K	2003Q2	Reduced

Recent insider activity — AMAT

Open-market purchases (P) and sales (S) from SEC Form 4 filings · last 12 months

No open-market insider trades in the last 12 months.

Form 4 filings for option exercises and other transaction types are excluded.

Congressional trades — AMAT

STOCK Act disclosures · last 12 months

Congressional trade data coming soon.

We are sourcing STOCK Act disclosures and will display them here shortly.

Learn more

What Is SEC Form 4?

Understand the insider trade filings behind AMAT activity.

What Is a 13F Filing?

How superinvestors disclose their quarterly holdings.

Insider Cluster Buying

Why multiple insiders buying together is a strong signal.

Superinvestor Consensus

The most widely held stocks across all tracked institutions.