Man am I glad that I picked KeypassXC as my password manager some years ago. Super safe, easy to use, costs nothing, not dependant on internet/cloud, can export data to another app at any time, transparent because open source.
I'm using Syncthing to synchronize across devices which arguably took some fiddling to set up but I only had to fiddle once and haven't touched the configuration since; it just works automagically in the background.
I guess it would be best to change the rules so that they cannot trade their company stocks at all while working there and a reasonable period beyond. I think some legislations already restrict floating stock like that but I'm no expert on the matter.