> now there are 2245 shares of which Ben Hermans owns at least 2135

Seems that Hermans' shares in Hyperion increased from 96,88% in 2020 to 100% in 2021:

https://docs.google.com/file/d/1d-7dv59cuhD2XtYDjRh0QVC3kQy8NYId/edit (page 12)
https://docs.google.com/file/d/1QIxiQGAUSQbow47Y2Eq_BBxUWBYJSKF7/edit (page 14)