SunWorks Inc (SUNWQ)

[markp1950]

http://www.investopedia.com/terms/s/schedule13d.asp
Definition of 'Schedule 13D'

A form that must be filed with the SEC under Rule 13D. The form is required when a person or group acquires more than 5% of any class of a company's shares. This information must be disclosed within 10 days of the transaction. Rule 13D requires the owner to also disclose any other person who has voting power or the power to sell the security.
Investopedia explains 'Schedule 13D'

Once the disclosure is made to the SEC, the company and the exchange(s) on which the company trades are notified of the new beneficial owner.

You can find most company's 13D filings in the SEC's EDGAR database.