Simplex Trading
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Simplex Trading’s Mattel MAT Stock Holding History

Simplex Trading’s Portfolio MAT Stock Details MAT Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$862K Sell
59,300
-10,300
-15% -$188K ﹤0.01% 2661
2025
Q4 		$1.38M Buy
69,600
+28,700
+70% +$554K ﹤0.01% 2298
2025
Q3 		$688K Sell
40,900
-19,700
-33% -$359K ﹤0.01% 3450
2025
Q2 		$1.2M Buy
60,600
+34,700
+134% +$618K ﹤0.01% 2610
2025
Q1 		$503K Sell
25,900
-39,100
-60% -$776K ﹤0.01% 3397
2024
Q4 		$1.15M Sell
65,000
-85,800
-57% -$1.62M ﹤0.01% 2701
2024
Q3 		$2.87M Sell
150,800
-900
-0.6% -$16.6K ﹤0.01% 1961
2024
Q2 		$2.47M Sell
151,700
-150,900
-50% -$2.73M ﹤0.01% 2008
2024
Q1 		$5.99M Buy
302,600
+109,500
+57% +$2.07M ﹤0.01% 1465
2023
Q4 		$3.65M Sell
193,100
-44,800
-19% -$872K ﹤0.01% 1828
2023
Q3 		$5.24M Buy
237,900
+209,000
+723% +$4.46M ﹤0.01% 1319
2023
Q2 		$564K Buy
28,900
+10,300
+55% +$186K ﹤0.01% 3179
2023
Q1 		$342K Sell
18,600
-118,800
-86% -$2.21M ﹤0.01% 3676
2022
Q4 		$2.45M Buy
137,400
+123,600
+896% +$2.24M ﹤0.01% 1712
2022
Q3 		$261K Sell
13,800
-39,800
-74% -$890K ﹤0.01% 4266
2022
Q2 		$1.2M Buy
53,600
+10,000
+23% +$236K ﹤0.01% 2424
2022
Q1 		$968K Buy
43,600
+9,200
+27% +$210K ﹤0.01% 2960
2021
Q4 		$741K Sell
34,400
-11,800
-26% -$248K ﹤0.01% 3276
2021
Q3 		$937K Hold
46,200
– – ﹤0.01% 3160
2021
Q2 		$928K Buy
46,200
+45,241
+4,718% +$934K ﹤0.01% 3231
2021
Q1 		$1.91M Buy
959
+107
+13% +$2.07K ﹤0.01% 1651
2020
Q4 		$1.49M Buy
852
+208
+32% +$3.06K ﹤0.01% 2086
2020
Q3 		$753K Buy
644
+44
+7% +$489 ﹤0.01% 2568
2020
Q2 		$580K Buy
600
+180
+43% +$1.63K ﹤0.01% 2730
2020
Q1 		$370K Sell
420
-738
-64% -$9.05K ﹤0.01% 2921
2019
Q4 		$1.57M Buy
1,158
+66
+6% +$783 ﹤0.01% 1695
2019
Q3 		$1.24M Buy
1,092
+303
+38% +$3.47K ﹤0.01% 1736
2019
Q2 		$884K Buy
789
+111
+16% +$1.3K ﹤0.01% 2018
2019
Q1 		$881K Buy
678
+179
+36% +$2.39K ﹤0.01% 2104
2018
Q4 		$498K Sell
499
-364
-42% -$4.82K ﹤0.01% 2231
2018
Q3 		$1.35M Buy
863
+234
+37% +$3.75K ﹤0.01% 1579
2018
Q2 		$1.03M Sell
629
-823
-57% -$12.5K ﹤0.01% 1762
2018
Q1 		$43K Buy
1,452
+668
+85% +$10.4K ﹤0.01% 2582
2017
Q4 		$124K Buy
784
+254
+48% +$4.03K 0.01% 1630
2017
Q3 		$12K Sell
530
-131
-20% -$2.34K ﹤0.01% 3610
2017
Q2 		$27K Buy
661
+4
+0.6% +$90 ﹤0.01% 2992
2017
Q1 		$15K Buy
657
+574
+692% +$15.4K ﹤0.01% 3569
2016
Q4 		$6K Sell
83
-535
-87% -$16.3K ﹤0.01% 4198
2016
Q3 		$21K Buy
618
+468
+312% +$15.3K ﹤0.01% 2914
2016
Q2 		$16K Sell
150
-368
-71% -$11.7K ﹤0.01% 3100
2016
Q1 		$90K Buy
518
+31
+6% +$942 0.01% 1447
2015
Q4 		$83K Buy
487
+262
+116% +$6.45K 0.01% 1506
2015
Q3 		$19K Sell
225
-14
-6% -$328 ﹤0.01% 2846
2015
Q2 		$13K Buy
239
+219
+1,095% +$5.77K ﹤0.01% 2844
2015
Q1 		$2K Sell
20
-14
-41% -$371 ﹤0.01% 4138
2014
Q4 		$2K Buy
+34
New +$1.05K ﹤0.01% 3768

Other funds holding MAT

EIG
EdgePoint Investment Group Toronto, Ontario, Canada $12.5B AUM 31.7% 1-Year Est. Return
Primecap Management
Primecap Management Pasadena, California $127B AUM 44.11% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
AI
Ariel Investments Chicago, Illinois $8.93B AUM 29.58% 1-Year Est. Return
SAM
Southeastern Asset Management Memphis, Tennessee $2.03B AUM 7.06% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
LSV Asset Management
LSV Asset Management Chicago, Illinois $46.4B AUM 27.74% 1-Year Est. Return

Simplex Trading's MAT Position: Q1 2026 in Review

Simplex Trading sold out of Mattel (MAT) in Q1 2026, closing a stake of 17,697 shares — an estimated $322K sold.

Simplex Trading first reported a position in MAT in Q4 2014 and held it in 31 quarters. The position peaked at $1.59M in Q2 2023. 425 funds tracked by Wall St. Rank hold MAT as of Q1 2026.

  • Simplex Trading reported no remaining Mattel position as of Q1 2026 after selling out during the quarter.
  • Simplex Trading sold 17,697 Mattel shares in Q1 2026, an estimated $322K.
  • Simplex Trading first reported a position in Mattel in Q4 2014 and held it in 31 quarters.
  • Simplex Trading's Mattel position peaked at $1.59M in Q2 2023.
  • 425 funds tracked by Wall St. Rank held Mattel as of Q1 2026.

Based on Simplex Trading's 13F filing for Q1 2026, filed 14 May 2026.