13F

Position

SIMPLEX TRADING, LLC in Quest Diagnostics 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 $13.4K$173.53$195.98

QuarterSharesValueImplied pxEst. markFlowWeight
Q4 20254.96K$860.4K0.0%
Q1 2026596$116.8K$195.98$13.4K−$756.9K0.0%