13F

Position

SIMPLEX TRADING, LLC in NPK International Inc.

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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 $706$11.92$14.49

QuarterSharesValueImplied pxEst. markFlowWeight
Q4 20258.63K$102.9K0.0%
Q1 2026275$3.98K$14.49$706−$99.6K0.0%