13F

Position

SIMPLEX TRADING, LLC in Data I/O Corp

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Estimated mark uses implied 13F prices (value ÷ shares). Adds are treated as happening at this quarter’s mark; cuts at last quarter’s. Share jumps can be splits, not buys. This is not realized P&L.

Latest estimated mark −$1.24K$3.17$2.53

QuarterSharesValueImplied pxEst. markFlowWeight
Q4 20251.93K$6.12K0.0%
Q1 20262.76K$6.98K$2.53−$1.24K$2.09K0.0%