MAT

MATTEL INC /DE/

Superinvestors

Institutional investors holding MAT

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

Congressional Activity

Congressional data coming soon

Insider Activity

22

Total trades

$1.1M

Volume

2

Buys

10

Sells

Last trade: May 7, 2026

Insider Tradeslast 90 days

Date	Insider	Type	Value
May 7, 2026	Karen Ancira	Option	–
May 7, 2026	Karen Ancira	Sell	$41K

Congressional Tradeslast 90 days

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