1. Short title This Act may be cited as the Main Street Growth Act . 2. Venture exchanges (a) Securities Exchange Act of 1934 Section 6 of the Securities Exchange Act of 1934 ( 15 U.S.C. 78f ) is amended by adding at the end the following: (m) Venture exchange (1) Definitions In this subsection: (A) Early-stage, growth company (i) In general The term early-stage, growth company means an issuer— (I) that has not made any registered initial public offering of any securities of the issuer; and (II) with a public float of not more than the value of public float required to qualify as a large accelerated filer under section 240.12b–2 of title 17, Code of Federal Regulations, or any successor regulation. (ii) Treatment when public float exceeds threshold An issuer shall not cease to be an early-stage, growth company by reason of the public float of the issuer exceeding the threshold specified in clause (i)(II) until the later of— (I) the end of the period of 24 consecutive months during which the public float of the issuer exceeds $2,000,000,000 (as such amount is indexed for inflation every 5 years by the Commission to reflect the change in the Consumer Price Index for All Urban Consumers published by the Bureau of Labor Statistics, setting the threshold to the nearest $1,000,000); and (II) the end of the 1-year period following the end of the 24-month period described in subclause (I), if the issuer requests the 1-year extension from a venture exchange and the venture exchange elects to provide that extension. (B) Public float With respect to an issuer, the term public float means the aggregate worldwide market value of the voting and non-voting common equity of the issuer held by non-affiliates. (C) Venture security (i) In general The term venture security means— (I) a security of an early-stage, growth company that is exempt from registration pursuant to section 3(b) of the Securities Act of 1933 ( 15 U.S.C. 77c(b) ); (II) a security of an emerging growth company