Otto founded several companies for the purpose of building aircraft. For his first company, the following entry was recorded in the Munich Company Register under the number 14/364 on 15 March 1911: "Gustav Otto in Munich, Flugmaschinenfabrik (aircraft factory), Office Karlstrasse 72". Shortly afterwards, Otto moved the workshop from its original location at 37, Gabelsberger Strasse to its new premises at 135, Schleissheimer Strasse, and in 1913 started to construct a new factory at 76, Neulerchenfeldstrasse (later Lerchenauer Straße) at the Oberwiesenfeld (the business was renamed "Otto-Werke" in 1915).