Simon Best previous companySimon was CEO of Roslin BioMed which was bought out by Geron Biomed (the parent company is Geron). https://www.wsj.com/articles/SB92585344478008877 Simon later was CEO of Ardana which fell apart in a very very very similar fashion to PLI
https://www.heraldscotland.com/news/12759100.ardana-unravels/ Geron's stock dropped by half last year bcause Johnson & Johnson ended it's colaboration with them.(maybe a TV lobby?)
https://www.fool.com/investing/2019/01/15/why-geron-stock-dropped-44-in-2018.aspx Roslin, Ardana, Geron Biomed, all had massive pipeline potential. And they all fell apart because of sudden financing problems.
Why? Simon Best seems to have a way of getting paid before he exits a company that later falls apart. Maybe it's just good timing..