I'd heard of Bobcat, De La Rue, Embraer, McIlhenny, Petzl, Tandberg (famous for reel-to-reel tape-recorders). I do think it's wonderful that the list includes a company known for "wristwatch hands".
Molex is a pretty well-known name because of the eponymous connector, but I'd never considered whether it might be a company.
I'm not sure I would consider Embraer a hidden champion. It's a fairly large aerospace conglomerate in Brazil with very high level of public awareness (especially among the global flying crowd).
It has a revenue of R$20m, which falls within the arbirary hidden-champion revenue cut-off of US$5b only due to the poor BRL-USD exchange rate right now.