Mattel, Inc.
US ˙ NasdaqGS ˙ US5770811025

SecurityMAT / Mattel, Inc.
InstitutionAmalgamated Bank
Latest Disclosed Ownership145,047 shares
Latest Disclosed Value $ 2,108
Amalgamated Bank reports 2.38% increase in ownership of MAT / Mattel, Inc.

On May 8, 2026 - Amalgamated Bank filed a 13F-HR form disclosing ownership of 145,047 shares of Mattel, Inc. (US:MAT) valued at $2,107,533 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 5, 2026 disclosing 141,682 shares of Mattel, Inc.. This represents a change in shares of 2.38% during the quarter. The current value of the position is $2,059,667 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)
2026-05-08 2026-03-31 13F MATTEL COM 577081102 145,047 3,365 2.38 2 0.00 0.0161
2026-02-05 2025-12-31 13F MATTEL COM 577081102 141,682 -6,375 -4.31 3 0.00 0.0203
2025-10-29 2025-09-30 13F MATTEL COM 577081102 148,057 -964 -0.65 2 0.00 0.0178
2025-08-04 2025-06-30 13F MATTEL COM 577081102 149,021 -5,581 -3.61 3 -33.33 0.0227
2025-04-25 2025-03-31 13F MATTEL COM 577081102 154,602 -7,331 -4.53 3 50.00 0.0257
2025-02-04 2024-12-31 13F MATTEL COM 577081102 161,933 -316 -0.19 3 -33.33 0.0236
2024-10-30 2024-09-30 13F MATTEL COM 577081102 162,249 -53,143 -24.67 3 0.00 0.0255
2024-08-12 2024-06-30 13F MATTEL COM 577081102 215,392 -16,243 -7.01 4 -25.00 0.0298
2024-04-23 2024-03-31 13F MATTEL COM 577081102 231,635 -13,692 -5.58 5 0.00 0.0392
2024-02-06 2023-12-31 13F MATTEL COM 577081102 245,327 20,364 9.05 5 0.00 0.0370
2023-11-08 2023-09-30 13F MATTEL COM 577081102 224,963 -5,568 -2.42 5 0.00 0.0422
2023-08-11 2023-06-30 13F MATTEL COM 577081102 230,531 -21,202 -8.42 5 0.00 0.0365
2023-05-02 2023-03-31 13F MATTEL COM 577081102 251,733 -48,567 -16.17 5 -20.00 0.0395
2023-02-10 2022-12-31 13F MATTEL COM 577081102 300,300 39,966 15.35 5 -99.90 0.0478
2022-11-09 2022-09-30 13F MATTEL COM 577081102 260,334 -20,173 -7.19 4,931 -21.28 0.0476
2022-08-15 2022-06-30 13F MATTEL COM 577081102 280,507 19,102 7.31 6,264 7.89 0.0584
2022-08-25 2022-03-31 13F/A-1 MATTEL COM 577081102 261,405 -141 -0.05 5,806 2.96 0.0451
2022-06-30 2022-03-31 13F MATTEL COM 577081102 261,405 -141 5,806 0.0461
2022-02-15 2021-12-31 13F/A-1 MATTEL COM 577081102 261,546 -24,794 -8.66 5,639 6.12 0.0416
2022-02-15 2021-12-31 13F MATTEL COM 577081102 261,546 -24,794 5,639 0.0416
2021-10-29 2021-09-30 13F MATTEL COM 577081102 286,340 -25,885 -8.29 5,314 -15.33 0.0449
2021-08-16 2021-06-30 13F MATTEL COM 577081102 312,225 255,021 445.81 6,276 450.53 0.0503
2021-05-13 2021-03-31 13F MATTEL COM 577081102 57,204 -4,483 -7.27 1,140 5.95 0.0427
2021-02-12 2020-12-31 13F MATTEL COM 577081102 61,687 200 0.33 1,076 49.65 0.0408
2020-10-30 2020-09-30 13F MATTEL COM 577081102 61,487 -1,162 -1.85 719 18.65 0.0313
2020-08-10 2020-06-30 13F MATTEL COM 577081102 62,649 -25,751 -29.13 606 -22.21 0.0280
2020-05-13 2020-03-31 13F MATTEL COM 577081102 88,400 -2,117 -2.34 779 -36.51 0.0190
2020-02-13 2019-12-31 13F MATTEL COM 577081102 90,517 6,205 7.36 1,227 27.81 0.0226
2019-11-13 2019-09-30 13F MATTEL COM 577081102 84,312 7,322 9.51 960 11.24 0.0202
2019-08-14 2019-06-30 13F MATTEL COM 577081102 76,990 3,705 5.06 863 -9.44 0.0201
2019-05-15 2019-03-31 13F MATTEL COM 577081102 73,285 1,261 1.75 953 32.36 0.0231
2019-02-15 2018-12-31 13F MATTEL COM 577081102 72,024 5,977 9.05 720 -30.57 0.0204
2018-11-14 2018-09-30 13F MATTEL COM 577081102 66,047 -8,031 -10.84 1,037 -14.72 0.0256
2018-07-18 2018-06-30 13F MATTEL COM 577081102 74,078 30,064 68.31 1,216 110.02 0.0297
2018-05-22 2018-03-31 13F MATTEL COM 577081102 44,014 472 1.08 579 -13.58 0.0154
2018-02-13 2017-12-31 13F MATTEL COM 577081102 43,542 3,804 9.57 670 8.94 0.0181
2017-11-09 2017-09-30 13F MATTEL COM 577081102 39,738 396 1.01 615 -27.39 0.0192
2017-08-10 2017-06-30 13F MATTEL COM 577081102 39,342 13,513 52.32 847 28.14 0.0278
2017-05-12 2017-03-31 13F MATTEL COM 577081102 25,829 -11,106 -30.07 661 -35.07 0.0329
2017-02-14 2016-12-31 13F MATTEL COM 577081102 36,935 6,454 21.17 1,018 10.29 0.0460
2016-11-15 2016-09-30 13F/A-1 MATTEL COM 577081102 30,481 67 0.22 923 -11.08 0.0536
2016-11-14 2016-09-30 13F MATTEL COM 577081102 8,903 270
2016-08-16 2016-06-30 13F MATTEL COM 577081102 30,414 18,299 151.04 1,038 155.04 0.0601
2016-05-11 2016-03-31 13F MATTEL COM 577081102 12,115 3,226 36.29 407 68.18 0.0397
2016-02-10 2015-12-31 13F MATTEL COM 577081102 8,889 -2,881 -24.48 242 -2.42 0.0299
2015-11-04 2015-09-30 13F MATTEL COM 577081102 11,770 328 2.87 248 -15.65 0.0260
2015-07-10 2015-06-30 13F MATTEL COM 577081102 11,442 263 2.35 294 15.29 0.0289
2015-04-22 2015-03-31 13F MATTEL COM 577081102 11,179 11,179 0.00 255 0.0311
2015-01-29 2014-12-31 13F MATTEL COM 577081102 0 -9,754 -100.00 0 -100.00
2014-11-14 2014-09-30 13F MATTEL COM 577081102 9,754 262 2.76 299 -19.19 0.0445
2014-08-11 2014-06-30 13F MATTEL COM 577081102 9,492 682 7.74 370 4.82 0.0558
2014-05-12 2014-03-31 13F MATTEL COM 577081102 8,810 -171 -1.90 353 -17.33 0.0608
2014-02-13 2013-12-31 13F MATTEL COM 577081102 8,981 8,981 3.09 427 12.07 0.0726
2013-11-14 2013-09-30 13F MATTEL COM 577081102 0 0 0 0.0000
2013-08-15 2013-06-30 13F MATTEL COM 577081102 0 -8,712 -100.00 0 -100.00
2014-02-13 2013-03-31 13F MATTEL COM 577081102 8,712 2,357 37.09 381 63.52 0.1081
2014-02-11 2012-12-31 13F MATTEL COM 577081102 6,355 6,355 233 0.0970
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.