Robert J. VanderZanden, Director at SPHERIX INC (SPEX), bought 1,000 shares at $2.60 ($3K) on 2006-04-24, disclosed to the SEC on 2006-04-25.
Open-market purchase of $3k SPEX by Director. Below the thresholds we flag for high-conviction alerts (no C-suite role, rare reversal, cluster, or A-grade history).
Nothing distinguishes this filing.
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