Arnold P. Kling, President, 10% Owner at PROTALEX INC (PRTX), bought 18,557,805 shares at $1.20 ($22.3M) on 2018-02-28, disclosed to the SEC on 2018-03-02.
High-signal trade — passes our conviction filters but the AI narrative is still being generated. Check back shortly.
Negative factors outweigh the positive ones.