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 		$219K Sell
15,100
-89,500
-86% -$1.63M ﹤0.01% 4202
2025
Q4 		$2.08M Sell
104,600
-8,400
-7% -$162K ﹤0.01% 1948
2025
Q3 		$1.9M Buy
113,000
+55,300
+96% +$1.01M ﹤0.01% 2377
2025
Q2 		$1.14M Buy
57,700
+36,000
+166% +$641K ﹤0.01% 2646
2025
Q1 		$421K Buy
21,700
+7,900
+57% +$157K ﹤0.01% 3576
2024
Q4 		$244K Sell
13,800
-900
-6% -$17K ﹤0.01% 4306
2024
Q3 		$280K Buy
14,700
+5,200
+55% +$95.8K ﹤0.01% 4201
2024
Q2 		$154K Sell
9,500
-417,500
-98% -$7.56M ﹤0.01% 4914
2024
Q1 		$8.46M Buy
427,000
+283,200
+197% +$5.37M ﹤0.01% 1238
2023
Q4 		$2.71M Buy
143,800
+91,500
+175% +$1.78M ﹤0.01% 2103
2023
Q3 		$1.15M Buy
52,300
+28,900
+124% +$617K ﹤0.01% 2532
2023
Q2 		$457K Buy
23,400
+2,400
+11% +$43.4K ﹤0.01% 3408
2023
Q1 		$386K Sell
21,000
-259,800
-93% -$4.83M ﹤0.01% 3548
2022
Q4 		$5.01M Buy
280,800
+94,300
+51% +$1.71M 0.01% 1214
2022
Q3 		$3.53M Buy
186,500
+143,100
+330% +$3.2M ﹤0.01% 1468
2022
Q2 		$969K Sell
43,400
-16,100
-27% -$380K ﹤0.01% 2662
2022
Q1 		$1.32M Sell
59,500
-49,900
-46% -$1.14M ﹤0.01% 2558
2021
Q4 		$2.36M Sell
109,400
-43,200
-28% -$906K ﹤0.01% 1869
2021
Q3 		$3.1M Hold
152,600
– – ﹤0.01% 1638
2021
Q2 		$3.07M Buy
152,600
+149,027
+4,171% +$3.08M ﹤0.01% 1651
2021
Q1 		$7.12M Buy
3,573
+1,211
+51% +$23.4K 0.01% 593
2020
Q4 		$4.12M Sell
2,362
-1,988
-46% -$29.3K 0.01% 1130
2020
Q3 		$5.09M Buy
4,350
+2,704
+164% +$30K 0.01% 857
2020
Q2 		$1.59M Sell
1,646
-1,307
-44% -$11.9K ﹤0.01% 1715
2020
Q1 		$2.6M Sell
2,953
-55
-2% -$674 ﹤0.01% 1089
2019
Q4 		$4.08M Buy
3,008
+1,203
+67% +$14.3K 0.01% 936
2019
Q3 		$2.06M Buy
1,805
+1,011
+127% +$11.6K 0.01% 1320
2019
Q2 		$890K Sell
794
-821
-51% -$9.64K ﹤0.01% 2011
2019
Q1 		$2.1M Buy
1,615
+828
+105% +$11.1K 0.01% 1332
2018
Q4 		$786K Buy
787
+250
+47% +$3.31K ﹤0.01% 1834
2018
Q3 		$843K Buy
537
+193
+56% +$3.09K ﹤0.01% 2064
2018
Q2 		$564K Sell
344
-556
-62% -$8.44K ﹤0.01% 2344
2018
Q1 		$278K Sell
900
-785
-47% -$12.2K 0.01% 1034
2017
Q4 		$198K Buy
1,685
+747
+80% +$11.8K 0.01% 1279
2017
Q3 		$395K Sell
938
-177
-16% -$3.16K 0.02% 793
2017
Q2 		$143K Buy
1,115
+549
+97% +$12.4K 0.01% 1463
2017
Q1 		$45K Buy
566
+245
+76% +$6.56K ﹤0.01% 2471
2016
Q4 		$48K Buy
321
+17
+6% +$517 ﹤0.01% 2202
2016
Q3 		$63K Buy
304
+161
+113% +$5.26K ﹤0.01% 1911
2016
Q2 		$10K Buy
143
+57
+66% +$1.81K ﹤0.01% 3607
2016
Q1 		$6K Sell
86
-615
-88% -$18.7K ﹤0.01% 3936
2015
Q4 		$33K Buy
701
+487
+228% +$12K ﹤0.01% 2269
2015
Q3 		$168K Buy
214
+68
+47% +$1.59K 0.01% 1029
2015
Q2 		$96K Sell
146
-15
-9% -$395 0.01% 1225
2015
Q1 		$137K Sell
161
-14
-8% -$371 0.02% 907
2014
Q4 		$73K Buy
+175
New +$5.38K 0.01% 1124

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.