MAT

Mattel Inc

3 super-investor ownerscombined $390Mlargest position 9.2%

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3 super-investors hold MAT worth a combined $390M. The largest position: Mason Hawkins at 9.2% of their portfolio. This quarter the cohort logged 1 buy and 1 sell on the name. Cohort Conviction Score: 34 — ranked #230 of 724 scored stocks. Conviction easing: 1 fewer super-investor hold it than in 2025Q4.

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Why super-investors own MAT

Ownership of MAT within this cohort is narrow and long-tenured, with just three managers holding a combined $390M after Samantha McLemore exited entirely in 2026Q1 — reducing the active owner count to its lowest point across the past eight quarters. Mason Hawkins remains the highest-conviction holder at 9.2% of his portfolio ($186M), and he added to the position this quarter, partially offsetting McLemore's departure in aggregate dollar terms. John Rogers holds the largest absolute stake at $197M (2.2% of portfolio), unchanged. Joel Greenblatt's position is negligible at $7M. The eight-quarter owner count trend — flat at two before ticking to three and back — signals that broader cohort interest has not materialized; this remains a Hawkins-and-Rogers thesis with little sign of widening conviction.

AI-synthesized from 13F filings. Not investment advice.