# Reg D, rule 506(b)

> For the complete documentation index, see [llms.txt](/llms.txt).

Companies using the Rule 506(b) exemption can raise an unlimited amount of money from Accredited Investors and a maximum of 35 unaccredited investors. Almost all startup investing occured this way until late 2013.

There's one catch. Companies using Rule 506(b) cannot advertise their fundraising.