Determing the company's size, location and type of business will help you determine what additional steps to take.
News about small, private, or subsidary companies is more likely to appear in local news sources than national ones.
Most of these press releases will also be in trade magazines and on the company's website.
Look at the company's webpage. The landing page tends to be a marketing tool. Look at the bottom for an "About Us" or "Investor Relations" section. If you can't find one, you may be looking at a brand rather than a company. Click the "Privacy Statement" to find the direct parent.
If it takes more than 10 minutes to find what you're looking for, contact me or others in the library for help.