MAT

MATTEL INC

13 superinvestors own MAT

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

Investor	Fund	Weight	Shares	Value	Quarter	Activity
Mason Hawkins	Longleaf Partners – Southeastern Asset Management	9.16%	12,812,157	$186.2M	2026Q1	Added
Thomas Gayner	Markel Group	4.29%	50,000	$659K	2000Q2	New
Bill Miller	Miller Value Partners	3.76%	3,271,319	$60.2M	2023Q1	Reduced
Ariel Investments	Ariel Investments (Bobrinskoy & Rogers)	2.21%	13,567,083	$197.1M	2026Q1	Added
Samantha McLemore	Patient Capital Management	2.14%	2,794,343	$55.4M	2025Q4	Added
Alex Roepers	Atlantic Investment Management	1.91%	700,000	$19.2M	2011Q2	Added
Valley Forge Capital Management	Valley Forge Capital Management	1.11%	141,520	$3.3M	2010Q3	Reduced
Viking Global Investors	Viking Global Investors	0.51%	433,800	$9.8M	2003Q1	Reduced
David Katz	Matrix Asset Advisors	0.20%	140,485	$2.6M	2004Q2	Added
Jensen Investment Management	Jensen Investment Management	0.01%	21,900	$500K	2015Q1	Added
Kenneth Fisher	Fisher Asset Management	0.00%	10,490	$171K	2024Q2	Added
Bill Nygren	Oakmark Select Fund – Harris Associates	0.00%	620	$11K	2006Q1	Added
Dodge & Cox	Dodge & Cox	0.00%	37,000	$737K	2021Q1	Reduced

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 MAT 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.