Data Axle (Reference Solutions)

Up to 250 companies can be downloaded in a batch.

This resource connects users to over 60 million individual business records and over 298 million consumer records and 329 million historical business records. A variety of demographic factors can be used to create custom lists that can be downloaded directly to Excel or rendered within graphs, charts and heat maps. This database is ideal for entrepreneurial planning, market research, GIS mapping projects, job-seeking activities, gauging economic trends and more.

Click on US Businesses. (Can only access US businesses)

Do a quick search in the database: 

You can also do an advanced search, which allows you to filter by keyword/SIC/NAICS, geography, financial data, ownership, etc. 

EMIS 

To search for company information, go to the menu and click Companies. 

Search for a company by typing in the search bar. 

PrivCo 

"Business and financial data on major, non-publicly traded corporations, including family owned, private equity owned, venture backed, and international unlisted companies."

Contains data on over 650,000 U.S. private companies, over 100,000 private market deals and venture capital fundings, and over 18,000 private market market investors. May search by keyword as well as by industry.

Access is free for University of Illinois at Urbana-Champaign users, but you must create an account. Sign up with your university e-mail address from the main page. 

Search by typing a company name at the top of the page or click on Company in the dropdown menu under Search on the right of the screen.