Information about private companies is often hard to come by, especially financial information, since the are not required to make any public disclosures. Most often, a directory listing, and perhaps news in the press, is the best you can find. PrivCo can help. It tracks and gathers information on close to 500,000 companies, much of which is only available here. They also track funding for these companies, startup, venture capital, private equity, and more, and list funders, so PrivCo is also useful for people seeking funding for their businesses.