Wikipedia:Articles for deletion/Robinhood Markets
There are plenty of major media coverage on this company from credible sources such as Bloomberg, TechCrunch, thestreet and more.  In addition, it appears to be the only company right now offering free stock trades. It also passes a few of the Wiki qualifications:  
— User:Expertwikiguy, NONE
Stance: keep
Cited policy: WP:ORGCRITE||WP:ORGIND||WP:CORPDEPTH (Wikipedia:Notability)