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Mattel Inc

MAT
Exchange
Nasdaq
Industry
Dolls & Stuffed Toys
SEC CIK
0000063276

In the last 90 days, Mattel Inc insiders filed 0 open-market purchases and 1 sale; 404 institutions reported holding it in 13F filings for Q2 2026, worth $4.23B in total; Southeastern Asset Management (Longleaf) is the only superinvestor holding it.

Superinvestors holding MAT, Q2 2026

1 superinvestor reports holding Mattel Inc on Form 13F, worth $171.0M in total. Weight is Mattel Inc's share of each 13F portfolio; actions compare shares with Q1 2026.

See all superinvestors
Superinvestors holding MAT in Q2 2026
Superinvestor% of portfolioSharesValuevs. previous quarter
Southeastern Asset Management (Longleaf)Mason Hawkins8.9%12,322,555$171.0MReduced−3.8%

Moves by quarter

Superinvestors that opened, added to, trimmed or sold out of MAT each quarter, comparing shares with the quarter before. A superinvestor that didn't file for a quarter isn't listed, and isn't counted as selling.

  1. Q2 2026

    1 superinvestor holding at quarter end

    Reduced
    Southeastern Asset Management (Longleaf) (−3.8%)

  2. Q1 2026

    1 superinvestor holding at quarter end

    Added
    Southeastern Asset Management (Longleaf) (+49.5%)

  3. Q4 2025

    1 superinvestor holding at quarter end

    Added
    Southeastern Asset Management (Longleaf) (+5.0%)

  4. Q3 2025

    1 superinvestor holding at quarter end

    Added
    Southeastern Asset Management (Longleaf) (+13.0%)

  5. Q2 2025

    1 superinvestor holding at quarter end

    Added
    Southeastern Asset Management (Longleaf) (+5.6%)

  6. Q1 2025

    1 superinvestor holding at quarter end

    Reduced
    Southeastern Asset Management (Longleaf) (−10.4%)

  7. Q4 2024

    1 superinvestor holding at quarter end

    Reduced
    Southeastern Asset Management (Longleaf) (−4.5%)

  8. Q3 2024

    1 superinvestor holding at quarter end

    Reduced
    Southeastern Asset Management (Longleaf) (−2.7%)

  9. Q2 2024

    1 superinvestor holding at quarter end

    Reduced
    Southeastern Asset Management (Longleaf) (−3.9%)
    Sold out
    Maverick Capital

  10. Q1 2024

    2 superinvestors holding at quarter end

    Reduced
    Southeastern Asset Management (Longleaf) (−3.4%), Maverick Capital (−81.8%)

  11. Q4 2023

    2 superinvestors holding at quarter end

    New
    Maverick Capital
    Reduced
    Southeastern Asset Management (Longleaf) (−1.7%)

  12. Q3 2023

    1 superinvestor holding at quarter end

    Reduced
    Southeastern Asset Management (Longleaf) (−3.5%)

  13. Q2 2023

    1 superinvestor holding at quarter end

    Reduced
    Southeastern Asset Management (Longleaf) (−17.2%)
    Sold out
    Maverick Capital

  14. Q1 2023

    2 superinvestors holding at quarter end

    Added
    Maverick Capital (+294.4%)
    Reduced
    Southeastern Asset Management (Longleaf) (−6.4%)

  15. Q4 2022

    2 superinvestors holding at quarter end

    Added
    Maverick Capital (+48.3%)
    Reduced
    Southeastern Asset Management (Longleaf) (−13.5%)

  16. Q3 2022

    2 superinvestors holding at quarter end

    New
    Maverick Capital
    Reduced
    Southeastern Asset Management (Longleaf) (−13.8%)

  17. Q2 2022

    1 superinvestor holding at quarter end

    Reduced
    Southeastern Asset Management (Longleaf) (−0.2%)

  18. Q1 2022

    1 superinvestor holding at quarter end

    Reduced
    Southeastern Asset Management (Longleaf) (−20.1%)

  19. Q4 2021

    1 superinvestor holding at quarter end

    Added
    Southeastern Asset Management (Longleaf) (+10.2%)
    Sold out
    Maverick Capital

  20. Q3 2021

    2 superinvestors holding at quarter end

    Added
    Maverick Capital (+54.8%)
    Reduced
    Southeastern Asset Management (Longleaf) (−3.4%)

  21. Q2 2021

    2 superinvestors holding at quarter end

    Added
    Southeastern Asset Management (Longleaf) (+17.6%)
    Reduced
    Maverick Capital (−46.9%)