Complex sentence: Wilhelm Maybach moved the company to Friedrichshafen and renamed it "Luftfahrzeug-Motoren-GmbH" with father and son holding 20% of the shares with an arrangement for Karl to inherit.
Split into simpler sentences: Wilhelm Maybach moved his company to Friedrichshafen and renamed it "Luftfahrzeug-Motoren-GmbH". Karl and Wilhem held 20% of the shares with an arrangement for Karl to inherit.