We have resources to help you find a publicly traded, U.S.-based company (not a Fortune 500 Company) or at least to confirm that if you already have a company in mind. You will have to consider some criteria that may help you narrow you list including:
These resources won't analyze the company for you, but they will help you gather the information you need so you can focus on the analysis. You will most likely have to search more than one source because they all focus on different areas.
These resources cover a lot of industries (including the ones for your companies), so there are a lot of reports to browse. I suggest starting with a search using the name of the company to find the right report.
Citation guides (see Citation Styles and Guides) will help with articles and other standard sources, but you may not find examples or specific guidelines for business sources. Just use your best judgment based on the guidelines.Here's an example for Mergent (without the correct indentation) in APA:
Mergent. (2017). Facebook, Inc. Retrieved from http://www.mergentonline.com/
For more help, I like the following guides (developed by librarians so you can trust them). They are all just examples and they may not necessarily all agree, so use what works best for you (and your instructor) and be consistent.