Mattel, Inc.
US ˙ NasdaqGS ˙ US5770811025

SecurityMAT / Mattel, Inc.
InstitutionHancock Whitney Corp
Latest Disclosed Ownership521,936 shares
Latest Disclosed Value $ 7,870,449
Hancock Whitney Corp reports 6.87% decrease in ownership of MAT / Mattel, Inc.

On May 15, 2026 - Hancock Whitney Corp filed a 13F-HR form disclosing ownership of 521,936 shares of Mattel, Inc. (US:MAT) valued at $7,583,730 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 560,417 shares of Mattel, Inc.. This represents a change in shares of -6.87% during the quarter. The current value of the position is $7,484,562 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.

Upgrade to unlock premium data and export to Excel .

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 521,936 -38,481 -6.87 7,870 -29.21 0.1306
2026-02-17 2025-12-31 13F MATTEL COM 577081102 560,417 -1,556 -0.28 11,119 17.55 0.2005
2025-11-17 2025-09-30 13F MATTEL COM 577081102 561,973 9,509 1.72 9,458 -13.18 0.1721
2025-08-14 2025-06-30 13F MATTEL COM 577081102 552,464 535,244 3,108.27 10,895 3,161.68 0.2082
2025-05-15 2025-03-31 13F MATTEL COM 577081102 17,220 17,220 335 0.0109
2018-02-12 2017-12-31 13F MATTEL COM 577081102 0 -54,928 -100.00 0 -100.00
2017-11-14 2017-09-30 13F MATTEL COM 577081102 54,928 13,156 31.49 851 -5.34 0.0361
2017-08-11 2017-06-30 13F MATTEL COM 577081102 41,772 7,649 22.42 899 2.86 0.0380
2017-05-09 2017-03-31 13F MATTEL COM 577081102 34,123 3,369 10.95 874 3.19 0.0364
2017-02-14 2016-12-31 13F MATTEL COM 577081102 30,754 933 3.13 847 -6.20 0.0315
2016-11-08 2016-09-30 13F MATTEL COM 577081102 29,821 1,119 3.90 903 0.56 0.0357
2016-08-09 2016-06-30 13F MATTEL COM 577081102 28,702 1,204 4.38 898 -2.92 0.0374
2016-06-07 2016-03-31 13F/A-1 MATTEL COM 577081102 27,498 10,920 65.87 925 105.56 0.0389
2016-05-13 2016-03-31 13F MATTEL COM 577081102 27,498 925
2016-02-12 2015-12-31 13F MATTEL COM 577081102 16,578 -9,951 -37.51 450 -19.35 0.0189
2015-11-16 2015-09-30 13F MATTEL COM 577081102 26,529 2,806 11.83 558 2.76 0.0233
2015-08-13 2015-06-30 13F MATTEL COM 577081102 23,723 0 0.00 543 0.00 0.0207
2015-05-14 2015-03-31 13F MATTEL COM 577081102 23,723 9,811 70.52 543 26.28 0.0207
2015-02-17 2014-12-31 13F MATTEL COM 577081102 13,912 13,912 430 0.0163
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.