MATTEL INC (MAT) Stock Institutional Trading Activity
MATTEL INC (MAT) position changes reported by tracked institutional filers across multiple SEC 13F reporting periods. Based on recent SEC 13F filings (Q4 2025), investors with some of the largest reported share count changes include Ariel Appreciation Fund, Longleaf Partners, Renaissance Technologies LLC, Miller Value Partners, and Dodge & Cox Stock Fund. Explore insights into buying and selling patterns, position changes, and investment conviction levels to understand institutional trading behavior and market dynamics.
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| Portfolio quarter | Name | Type | Quantity | Remaining | Reported stock balance |
|---|---|---|---|---|---|
| Q1 2016 | Ariel Appreciation Fund | Sell | -1,443,895 | 4,419,470 | $148,583 |
| Q1 2016 | Causeway Capital Management | Sell | -4,059,163 | 41,400 | $1,800 |
| Q1 2016 | Renaissance Technologies LLC | Buy | 785,100 | 1,545,700 | $51,966 |
| Q4 2015 | Ariel Appreciation Fund | Buy | 31,080 | 5,863,365 | $159,308 |
| Q4 2015 | Causeway Capital Management | Sell | -431,644 | 4,100,563 | $133,696 |
| Q3 2015 | Ariel Appreciation Fund | Buy | 2,646,670 | 5,832,285 | $122,828 |
| Q3 2015 | Causeway Capital Management | Buy | 1,723,979 | 4,532,207 | $117,838 |
| Q2 2015 | Ariel Appreciation Fund | Buy | 3,185,615 | 3,185,615 | $81,838 |
| Q2 2015 | Renaissance Technologies LLC | Sell | -1,930,699 | 760,600 | $19,540 |
| Q2 2015 | Causeway Capital Management | Buy | 493,188 | 2,808,228 | $84,372 |
| Q1 2015 | Jensen Investment Management | Buy | 5,060 | 21,900 | $500 |
| Q1 2015 | Renaissance Technologies LLC | Buy | 2,205,199 | 2,691,299 | $61,496 |
| Q1 2015 | Causeway Capital Management | Sell | -146,791 | 2,315,040 | $70,839 |
| Q4 2014 | Jensen Investment Management | Buy | 16,840 | 16,840 | $521 |
| Q4 2014 | Causeway Capital Management | Buy | 475,806 | 2,461,831 | $85,642 |
| Q3 2014 | Renaissance Technologies LLC | Buy | 244,900 | 486,100 | $14,899 |
| Q3 2014 | Causeway Capital Management | Buy | 1,733,025 | 1,986,025 | $66,338 |
| Q2 2014 | Causeway Capital Management | Buy | 253,000 | 253,000 | $10,230 |
| Q3 2013 | Gardner Russo & Quinn | Sell | -5,000 | 6,625 | $277 |
| Q2 2013 | Gardner Russo & Quinn | Buy | 11,625 | 11,625 | $527 |
| Q2 2013 | Renaissance Technologies LLC | Buy | 241,200 | 241,200 | $10,929 |
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.