As I said, we don't know who or what bought them. The SEC doesn't permit people or companies to grab up half of the shares of a company, without filing. The first trigger is 5%, then 10%, then 50%. There are names for shareholders with large amounts of a company's shares, such as principle shareholder, majority shareholder, etc.
A report of someone who violated these rules:
"The SEC brought charges against a fund manager for 13D violations, in yet another reminder that it will pursue enforcement actions against filers for Schedule 13D violations even without a pattern of repeat violations.
On Sept. 17, 2020, the SEC announced the settlement of charges brought against an investment manager of certain private funds (“IM”) for failure to timely amend a statement of beneficial ownership report on Schedule 13D (Administrative Proceeding File No. 3-20020). [1]
The 13D Requirements
Section 13(d) of the Securities Exchange Act of 1934 requires a “beneficial owner”:
That acquires more than 5%;
Of a class of any voting, equity securities registered under Section 12 of the Exchange Act;
To file with the SEC within ten days of any such acquisition; and
A statement on Schedule 13D describing such acquisition and containing certain other information, including a description of any plans or proposals that the beneficial owner may have with respect to certain enumerated matters regarding the issuer."
