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Livermore
Livermore
ZHEN

Simplex Trading, LLC

SEC CIK
0001488542
Latest filing
Aug 12, 2026

MAT holding history

Mattel Inc in every 13F filed by Simplex Trading, LLC, including the quarters it was sold out or no filing was made. Changes compare share counts with the previous calendar quarter.

MAT overviewAll 13F holders of MATFull Q2 2026 holdings

Shares (Q2 2026)
17,842
Value
$247.6K
% of portfolio
<0.1%
Quarters held
18
Since Q1 2021
Holdings of MAT by Simplex Trading, LLC, by quarter
QuarterSharesValue% of portfolioShare changeActionAll holders
Q2 202617,842$247.6K<0.1%+17,842NewHolders
Q1 20260$00.0%−17,697−100.0%Sold outHolders
Q4 202517,697$351.1K<0.1%−36,889−67.6%ReducedHolders
Q3 202554,586$918.0K<0.1%+50,676+1,296.1%AddedHolders
Q2 20253,910$77.0K<0.1%+3,910NewHolders
Q1 20250$00.0%−14,164−100.0%Sold outHolders
Q4 202414,164$251.0K<0.1%−3,571−20.1%ReducedHolders
Q3 202417,735$337.0K<0.1%+17,735NewHolders
Q2 20240$00.0%−74,961−100.0%Sold outHolders
Q1 202474,961$1.48M<0.1%+24,347+48.1%AddedHolders
Q4 202350,614$955.0K<0.1%+26,357+108.7%AddedHolders
Q3 202324,257$534.0K<0.1%−57,286−70.3%ReducedHolders
Q2 202381,543$1.59M0.1%−595−0.7%ReducedHolders
Q1 202382,138$1.51M0.1%+27,211+49.5%AddedHolders
Q4 202254,927$979.0K<0.1%+33,427+155.5%AddedHolders
Q3 202221,500$407.0K<0.1%+21,500NewHolders
Q2 20220$00.0%−19,119−100.0%Sold outHolders
Q1 202219,119$424.0K<0.1%−24,984−56.6%ReducedHolders
Q4 202144,103$950.0K<0.1%+3,076+7.5%AddedHolders
Q3 202141,027$832.0K<0.1%−800−1.9%ReducedHolders
Q2 202141,827$840.0K<0.1%+11,291+37.0%AddedHolders
Q1 202130,536$608.0K<0.1%––Holders

Livermore's 13F data starts with Q1 2021, so Q1 2021 has no change from the previous quarter.