Zafiris G. Zafirelis, President, Chairman and CEO at BIOPURE CORP (BPUR), bought 11,720 shares at $0.85 ($10K) on 2007-11-06, disclosed to the SEC on 2007-11-07.
Open-market purchase of $10k BPUR by President, Chairman and CEO. Below the thresholds we flag for high-conviction alerts (no C-suite role, rare reversal, cluster, or A-grade history).
Nothing distinguishes this filing.