Ryloth Ventures was a trade-based corporation located on Ryloth. During the Clone Wars, it was headed by Has Doneeta, with Miles Croft as a business negotiator. Senator Vien'sai'Malloc was interested in having Ryloth Ventures trade on Devaron.
Presumably Ryloth Ventures was a real corporation; however, as it was part of a backstory given by the undercover Jedi Aayla Secura, An'ya Kuro, and Tholme, the amount of truth to it is not known.