As a retail shareholder, I could buy as many shares as I wanted on the open market. The cost being entirely what I wanted to invest. I would not have to report anything. Corrections welcome.

Every person who is directly or indirectly the beneficial owner of more than 10 percent of any class of any equity security (other than an exempted security) which is registered pursuant to section 12, or who is a director or an officer of the issuer of such security, shall file the statements required by this subsection with the Commission (and, if such security is registered on a national securities exchange, also with the exchange).

http://www.law.uc.edu/CCL/34Act/sec1...

Be well