AMAT

Boston Scientific Corp

$353.80

Closing price as of Apr 1, 2026

13 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
Christopher Davis	Davis Selected Advisers	4.85%	4,201,298	$1.1B	2025Q4	Reduced
William Von Mueffling	Cantillon Capital Management	4.13%	2,973,661	$764.2M	2025Q4	Added
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
David Katz	Matrix Asset Advisors	1.66%	71,798	$18.5M	2025Q4	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
Kenneth Fisher	Fisher Asset Management	0.04%	455,077	$117.0M	2025Q4	Added
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
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

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.

STOCK Act disclosures · last 12 months

Congressional trade data coming soon.

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

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.