Where can they buy and make a profit?

I want to make money on Pfizer's shares which produces vaccines from Covita. Where can they buy and make a profit?

This is a good choice of the company for earnings. Now it develops and profit over stocks is only increasing. I purchased the stock at the FBS broker and how Ex Dividend Date Calendar https://fbs.eu/en/analytics/calendar?type=dividend shows everything on time. I added Apple and Cisco to the Pfizer promotions. So reliable.