MATTEL INC (MAT) Institutional Ownership Changes & 13F Activity

MATTEL INC (MAT). Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings. This page analyzes institutional buying and selling activity, new holdings, and sold-out positions among tracked filers. Notable filers include Longleaf Partners, Ariel Appreciation Fund, Sequoia Financial Advisors, Renaissance Technologies LLC, and Miller Value Partners.

Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q1 2026Longleaf PartnersBuy4,241,82912,812,157$186,160,640
Q1 2026Ariel Appreciation FundBuy1,034,95013,567,083$197,129,716
Q4 2025Ariel Appreciation FundSell-1,228,33712,532,133$248,637,519
Q4 2025Longleaf PartnersBuy409,0328,570,328$170,035,308
Q4 2025Sequoia Financial AdvisorsBuy12,22412,224$242,525
Q3 2025Longleaf PartnersBuy941,0318,161,296$137,354,612
Q3 2025Ariel Appreciation FundSell-460,31613,760,470$231,588,710
Q2 2025Longleaf PartnersBuy381,3317,220,265$142,383,627
Q2 2025Ariel Appreciation FundBuy362,67114,220,786$280,433,899
Q1 2025Ariel Appreciation FundSell-962,63013,858,115$269,263,175
Q1 2025Longleaf PartnersSell-793,4106,838,934$132,880,486
Q1 2025Renaissance Technologies LLCSell-41,87398,500$1,913,855
Q4 2024Renaissance Technologies LLCSell-909,527140,373$2,488,813
Q4 2024Longleaf PartnersSell-357,9807,632,344$135,321,460
Q4 2024Ariel Appreciation FundBuy12,58314,820,745$262,771,809
Q3 2024Longleaf PartnersSell-218,1847,990,324$152,215,673
Q3 2024Ariel Appreciation FundSell-9,84814,808,162$282,095,486
Q2 2024Ariel Appreciation FundSell-765,28314,818,010$240,940,843
Q2 2024Longleaf PartnersSell-332,1768,208,508$133,470,339
Q1 2024Renaissance Technologies LLCBuy443,4001,049,900$20,799
Q1 2024Longleaf PartnersSell-299,7278,540,684$169,190,950
Q1 2024Ariel Appreciation FundBuy112,78615,583,293$308,705,035
Q4 2023Renaissance Technologies LLCBuy201,500606,500$11,451
Q4 2023Ariel Appreciation FundSell-184,68815,470,507$292,083,172
Q4 2023Longleaf PartnersSell-156,7558,840,411$166,906,960
Q3 2023Ariel Appreciation FundSell-810,81915,655,195$344,883,945
Q3 2023Longleaf PartnersSell-327,0818,997,166$198,207,567
Q2 2023Longleaf PartnersSell-1,942,4219,324,247$182,195,787
Q2 2023Renaissance Technologies LLCSell-1,393,600405,000$7,914
Q2 2023Ariel Appreciation FundBuy187,15716,466,014$321,745,913

Frequently asked questions about MAT activity

  • Which institutional owners are buying MAT?

    Institutional owners buying MAT include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.

  • What does "buy" mean in MAT activity?

    "Buy" means an investor increased their reported position in MAT compared to the prior reporting period. This reflects growing exposure to MATTEL INC (MAT) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in MAT increasing?

    Institutional interest in MAT can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.

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