Mattel, Inc.
US ˙ NasdaqGS ˙ US5770811025

SecurityMAT / Mattel, Inc.
InstitutionState Street Corp
Latest Disclosed Ownership9,718,373 shares
Latest Disclosed Value $ 141,207,960
State Street Corp reports 1.13% increase in ownership of MAT / Mattel, Inc.

On May 15, 2026 - State Street Corp filed a 13F-HR form disclosing ownership of 9,718,373 shares of Mattel, Inc. (US:MAT) valued at $141,207,960 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 9,609,711 shares of Mattel, Inc.. This represents a change in shares of 1.13% during the quarter. The current value of the position is $139,361,469 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F MATTEL COM 577081102 9,718,373 108,662 1.13 141,208 -25.94 0.0049
2026-02-13 2025-12-31 13F MATTEL COM 577081102 9,609,711 -395,469 -3.95 190,657 13.22 0.0064
2025-11-14 2025-09-30 13F MATTEL COM 577081102 10,005,180 -681,092 -6.37 168,387 -20.09 0.0058
2025-08-14 2025-06-30 13F MATTEL COM 577081102 10,686,272 -455,219 -4.09 210,733 -2.65 0.0079
2025-05-15 2025-03-31 13F MATTEL COM 577081102 11,141,491 279,869 2.58 216,479 12.41 0.0089
2025-02-14 2024-12-31 13F MATTEL COM 577081102 10,861,622 344,352 3.27 192,577 -3.88 0.0076
2024-11-14 2024-09-30 13F MATTEL COM 577081102 10,517,270 318,125 3.12 200,354 20.81 0.0082
2024-08-14 2024-06-30 13F MATTEL COM 577081102 10,199,145 -160,541 -1.55 165,838 -19.19 0.0072
2024-05-15 2024-03-31 13F MATTEL COM 577081102 10,359,686 304,547 3.03 205,225 8.10 0.0092
2024-02-14 2023-12-31 13F MATTEL COM 577081102 10,055,139 231,859 2.36 189,841 -12.28 0.0092
2023-11-14 2023-09-30 13F MATTEL COM 577081102 9,823,280 8,062 0.08 216,407 12.84 0.0120
2023-08-14 2023-06-30 13F MATTEL COM 577081102 9,815,218 -78,730 -0.80 191,789 5.30 0.0101
2023-05-15 2023-03-31 13F MATTEL COM 577081102 9,893,948 110,137 1.13 182,142 4.35 0.0103
2023-05-15 2022-12-31 13F/A-99 MATTEL COM 577081102 9,783,811 368,338 3.91 174,543 -2.12 0.0103
2023-05-15 2022-12-31 13F MATTEL COM 577081102 9,783,811 368,338 174,543 0.0103
2022-11-15 2022-09-30 13F MATTEL COM 577081102 9,415,473 104,063 1.12 178,329 -14.23 0.0113
2022-08-15 2022-06-30 13F MATTEL COM 577081102 9,311,410 99,813 1.08 207,924 1.63 0.0125
2022-05-16 2022-03-31 13F MATTEL COM 577081102 9,211,597 249,433 2.78 204,590 5.88 0.0101
2022-02-14 2021-12-31 13F MATTEL COM 577081102 8,962,164 -73,231 -0.81 193,224 15.22 0.0092
2021-11-15 2021-09-30 13F MATTEL COM 577081102 9,035,395 -11,770 -0.13 167,697 -7.78 0.0089
2021-08-16 2021-06-30 13F MATTEL COM 577081102 9,047,165 1,084,357 13.62 181,848 14.64 0.0096
2021-07-09 2021-03-31 13F/A-1 MATTEL COM 577081102 7,962,808 -8,166 -0.10 158,619 14.04 0.0091
2021-05-17 2021-03-31 13F MATTEL COM 577081102 7,962,808 -8,166 158,619 0.0091
2021-02-16 2020-12-31 13F MATTEL COM 577081102 7,970,974 182,616 2.34 139,093 52.64 0.0085
2020-11-10 2020-09-30 13F MATTEL COM 577081102 7,788,358 -264,008 -3.28 91,124 17.03 0.0062
2020-08-14 2020-06-30 13F MATTEL COM 577081102 8,052,366 -332,872 -3.97 77,866 5.40 0.0057
2020-06-19 2020-03-31 13F/A-1 MATTEL COM 577081102 8,385,238 22,878 0.27 73,874 -34.80 0.0065
2020-05-11 2020-03-31 13F MATTEL COM 577081102 8,385,238 22,878 73,874 6,487.6247
2020-02-06 2019-12-31 13F MATTEL COM 577081102 8,362,360 -150,273 -1.77 113,310 16.86 0.0078
2019-11-14 2019-09-30 13F MATTEL COM 577081102 8,512,633 -1,156,001 -11.96 96,959 -10.54 0.0072
2019-08-14 2019-06-30 13F MATTEL COM 577081102 9,668,634 -5,608,432 -36.71 108,385 -45.43 0.0081
2019-05-15 2019-03-31 13F MATTEL COM 577081102 15,277,066 249,360 1.66 198,602 32.29 0.0155
2019-02-12 2018-12-31 13F MATTEL COM 577081102 15,027,706 533,731 3.68 150,127 -34.03 0.0137
2018-11-09 2018-09-30 13F MATTEL Common equity shares 577081102 14,493,975 289,795 2.04 227,554 -2.44 0.0175
2018-08-14 2018-06-30 13F MATTEL Common equity shares 577081102 14,204,180 -28,354 -0.20 233,240 24.61 0.0195
2018-05-15 2018-03-31 13F MATTEL Common equity shares 577081102 14,232,534 63,445 0.45 187,169 -14.11 0.0159
2018-02-14 2017-12-31 13F MATTEL Common equity shares 577081102 14,169,089 -81,173 -0.57 217,920 -1.21 0.0175
2017-11-14 2017-09-30 13F MATTEL Common equity shares 577081102 14,250,262 -388,161 -2.65 220,595 -30.01 0.0190
2017-08-14 2017-06-30 13F MATTEL Common equity shares 577081102 14,638,423 -135,107 -0.91 315,160 -16.70 0.0279
2017-05-15 2017-03-31 13F MATTEL Common equity shares 577081102 14,773,530 117,584 0.80 378,355 -6.29 0.0338
2017-02-09 2016-12-31 13F MATTEL Common equity shares 577081102 14,655,946 649,141 4.63 403,772 -4.80 0.0380
2017-01-13 2016-09-30 13F/A-1 MATTEL Common equity shares 577081102 14,006,805 270,787 1.97 424,121 -1.32 0.0427
2016-11-14 2016-09-30 13F MATTEL Common equity shares 577081102 10,425,582 315,681
2016-08-12 2016-06-30 13F MATTEL Common equity shares 577081102 13,736,018 -304,029 -2.17 429,806 -8.94 0.0462
2016-05-20 2016-03-31 13F/A-1 MATTEL Common equity shares 577081102 14,040,047 -395,829 -2.74 472,027 20.35 0.0510
2016-05-12 2016-03-31 13F MATTEL Common equity shares 577081102 14,040,047 472,027
2016-02-16 2015-12-31 13F MATTEL Common equity shares 577081102 14,435,876 280,660 1.98 392,219 31.57 0.0429
2015-11-16 2015-09-30 13F MATTEL Common equity shares 577081102 14,155,216 18,055 0.13 298,105 -17.92 0.0347
2015-08-13 2015-06-30 13F MATTEL Common equity shares 577081102 14,137,161 -762,876 -5.12 363,190 6.67 0.0388
2015-05-15 2015-03-31 13F MATTEL Common equity shares 577081102 14,900,037 -150,918 -1.00 340,469 -26.90 0.0349
2015-02-11 2014-12-31 13F MATTEL Common equity shares 577081102 15,050,955 620,490 4.30 465,746 5.30 0.0464
2014-11-12 2014-09-30 13F/A-1 MATTEL Common equity shares 577081102 14,430,465 322,370 2.29 442,296 -19.55 0.0476
2014-11-10 2014-09-30 13F MATTEL Common equity shares 577081102 14,430,465 442,296
2014-08-12 2014-06-30 13F MATTEL Common equity shares 577081102 14,108,095 -830,095 -5.56 549,793 -8.24 0.0594
2014-05-15 2014-03-31 13F/A-1 MATTEL Common equity shares 577081102 14,938,190 674,379 4.73 599,161 -11.72 0.0681
2014-05-13 2014-03-31 13F MATTEL Common equity shares 577081102 14,938,190 599,161
2014-02-06 2013-12-31 13F/A-1 MATTEL Common equity shares 577081102 14,263,811 261,381 1.87 678,677 15.79 0.0755
2014-02-06 2013-12-31 13F MATTEL Common equity shares 577081102 13,788,417 504,934
2013-11-12 2013-09-30 13F MATTEL Common Stock 577081102 14,002,430 14,372 0.10 586,143 -7.52 0.0722
2013-08-08 2013-06-30 13F MATTEL Common Stock 577081102 13,988,058 13,988,058 633,799 0.0826
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.