It happened in the middle of the summer of 2021.

in fact they all sold at the end of June. Most of them exercised cheap options in the 0.28$ 0.56$/option and than sold in the 1.30 to 1.55$ share price... 

As a group, 770 000 options from excutives alones (Barnes, Mika, Vivek and Suresh) were exercised and resold and nearly 1 million shares were sold with the 2 directors that also sold shares.

It was quite a rally killer move. They probably sold to payback their money invested in devbentures that they converted earlier in April 2021. Anyway, it was a greedy move.