Within Teamwork, you can delete a company from your site via the People area.
Note: Only site administrators and users with permission to manage people & companies can delete a company.
Go to the People area of your site and select the Companies subsection.
Select the company you would like to delete to view the company's profile.
If there are any people in the company when you delete it, they will also be deleted. To prevent users being deleted when deleting a company, click the three dots in the top right corner and select Move People from this Company.
In the Move People modal, you can select the users you want to move and choose a destination company.
Once you have moved the necessary people, click the three dots in the company profile and choose Delete this Company.
If you would like to delete a number of people from your site quickly, you can move them all to a new temporary company and then delete it.
For more information, see: Working with the Companies View