In the old LexisNexis - Companies, we were able to choose "Market and Industry Reports" as a topic for searching. This is still possible in Nexis Uni
On either the Home page or the Business Discovery page (a box found under Discover Topics),
On the Advanced Search page, choose SEC Filings from the dropdown. In the old LexisNexis, you could click a box for any or all of the SEC filings such as Annual Reports, Proxy Statements, or various forms; in the new Nexis Uni, you must type in the form type in the box under Document Segments/Fields