|Library of Congress Main Reading Room -- Source: https://www.loc.gov/rr/|
A good place to start is the Federal Procurement Data System (FPDS) on www.fpds.gov.
FPDS is free, government website which tracks procurement activities of more than 60 fedeal departments. It is especially valuable for information on contract awards. You can search by the name of the competitor and also by the target agency.
Looking up a contract award gives you detailed information such as the award date, award amount, contracting office name and address and much more. Below is a cropped image from an award record.
The award information can be a jumping off point to related records. You can follow links in many of the fields such as going to the vendor record or the contracting agency and searching for related awards.
FPDS data is included in many paid subscriptions to federal data sources, such as those listed in my previous blog post GovCon Information Sources: A List.
Another source for competitive information is from the competitors themselves. Many share news items on government contract wins and teaming relationships on their websites. You can search for the company name along with "contract awards" or related search keywords to find press releases.