Use MergentOnline (linked on the Company Information Research Guide) to search by Company Name. You can also use the Executive Search Tab in Mergent to target specific characteristics like salary or education.
Using Nexis Uni's Guided Search component, click on the button for Company Info. Put the company name in the next field. Then select the type of content you want from the "show me" drop-down list.
While the EDGAR database is the official (and free) searchable site for the SEC, the search interface is antiquated and not super friendly.
I recommend using either MergentOnline's Government Filings module or Lexis-Nexis Academic's SEC filings database. From the LN-A homepage click on Browse at the top of the screen.