MAT
Mattel Inc
Mattel Inc historical holders
total: 9
Longleaf Partners Mattel Inc transactions over time
- Total transactions:
- 15
- New positions:
- 1
- Added:
- 3
- Reduced:
- 11
- Held since:
- 2019 Q3
- Held for:
- 27 quarters
- Latest activity:
- 2026 Q1
Mason Hawkins has been an institutional investor in Mattel Inc (MAT) since 2019 Q3. According to 2026 Q1 report, Mason Hawkins holds 5,093,424 shares with a market value of roughly $74.01M representing 7.03% of their equity portfolio. The fund/company first acquired MAT in 2019 Q3, initially purchasing about 9.96M shares. Since the initial investment, Longleaf Partners has made 14 more transactions in this position.
Does Mason Hawkins still hold MAT?
Yes, Mason Hawkins continues to hold Mattel Inc (MAT). According to their 2026 Q1 report, they maintain a position of 5,093,424 shares valued at approximately $74.01M, representing 7.03% of their equity portfolio.
When did Mason Hawkins first invest in MAT?
Mason Hawkins first invested in Mattel Inc (MAT) in 2019 Q3 at the reported quarter-end price of $11.39 per share, acquiring 9,956,051 shares in their initial purchase.
What is Mason Hawkins's average cost basis for MAT?
Based on historical transaction data, Mason Hawkins's estimated cost basis for Mattel Inc (MAT) is approximately $12.29 per share. This represents their average reported price* across all buy transactions.
Estimated cost basis*
- Weighted AVG buy price:
- $12.29
- Weighted AVG sell price:
- $16.95
MAT transactions history by Longleaf Partners
15 results
| Period |
% of portfolio |
Shares held after* |
Reported price* |
Value* |
% (shares) of activity |
% change to portfolio |
|---|---|---|---|---|---|---|
|
2026 Q1
|
7.03%
|
5,093,424
|
$14.53
|
$74,007,451
|
+50.84% (+1,716,754)
|
+2.37%
|
|
2025 Q4
|
6.11%
|
3,376,670
|
$19.84
|
$66,993,133
|
-13.65% (-533,875)
|
-0.93%
|
|
2025 Q3
|
5.81%
|
3,910,545
|
$16.83
|
$65,814,472
|
+12.91% (+447,058)
|
+0.66%
|
|
2025 Q2
|
5.78%
|
3,463,487
|
$19.72
|
$68,299,964
|
-0.82% (-28,509)
|
-0.05%
|
|
2025 Q1
|
5.83%
|
3,491,996
|
$19.43
|
$67,849,482
|
-7.44% (-280,502)
|
-0.43%
|
|
2023 Q2
|
5.37%
|
3,772,498
|
$19.54
|
$73,714,611
|
-9.62% (-401,369)
|
-0.59%
|
|
2023 Q1
|
5.74%
|
4,173,867
|
$18.41
|
$76,840,891
|
-4.91% (-215,402)
|
-0.32%
|
|
2022 Q4
|
6.33%
|
4,389,269
|
$17.84
|
$78,304,559
|
+14.35% (+550,921)
|
+0.79%
|
|
2022 Q3
|
6.11%
|
3,838,348
|
$18.94
|
$72,698,311
|
-12.05% (-525,893)
|
-0.69%
|
|
2022 Q1
|
5.54%
|
4,364,241
|
$22.21
|
$96,929,793
|
-19.01% (-1,024,134)
|
-1.27%
|
|
2021 Q4
|
6.47%
|
$21.56
|
-5.28% (-300,419)
|
|||
|
2021 Q1
|
6.01%
|
$19.92
|
-3.15% (-184,745)
|
|||
|
2020 Q4
|
6.28%
|
$17.45
|
-29.45% (-2,451,604)
|
|||
|
2020 Q1
|
6.23%
|
$8.81
|
-16.38% (-1,630,908)
|
|||
|
2019 Q3
|
6.37%
|
$11.39
|
new
|
|||
* Shares, change to shares, sold shares, shares held after: split-adjusted.
* Reported price: this doesn't represent the actual buy or sell price. It is the split-adjusted price of the security as of the last day of the reported period.
If the security is completely sold out, we show the reported split-adjusted price prior to the actual period.
If the security is completely sold out, we show the reported split-adjusted price prior to the actual period.
* Estimated cost basis: based on "Reported price*" (not earlier than 2013 Q2). Calculation starts from the latest "new buy" activity to the latest "close out" activity (if any).
* Value or Price: If the security is completely sold out, we show the reported value (or price) prior to the actual period.
* New buy or own: this means there is no earlier reporting (for us or in general). So we can't know if the actual purchase of the security happened at the reported period or earlier.