SEC filings from mid-1990s to present are freely available through SEC's EDGAR (Electronic Data Gathering, Analysis and Retrieval) database. In addtion, you can find current filings in following databases:
Capital IQ: Search by company name and then look for filings on left navigation bar.
D&B Hoovers. Search by company name and then look for filings on the left-side menu
LSEG Workspace: Look under Filings & Events for Company Filings.