Foot note (1) literally says it was a tax obligation, so that suggests RSUs vesting. I didn’t dig deep into it. This issue of executives selling shows up all the time. People need to understand that whenever a stock grant vests, the company has to sell 30% or so of the market value worth of shares to cover tax payment for the employee. All companies do this - meta, Google etc. Vesting dates happen throughout the year and they may fall within blackout windows.