In order to find out which companies your collaborators have been working with, you need to first select the expert, collaborator, of your interest and go to his/her profile.
Once in the profile (yellow arrow in the screenshot below), click on the Industry Payments tab highlighted here by the red circle. There, you will find two different charts: the one on the left shows the top 10 companies with the highest number of total payments, and the other displays the general trend of the industry payments during the last 5 years from the most recent payment. Both charts reflect payments received by the specific expert being analyzed.
However, if you want to know more about the other companies which were not listed on the top 10, simply click on the List-view button on the top right corner. The name of the companies can be found in the Payer field of the entry (green underline).
The lists can be sorted by "Amount" or "Most recent payments". To move between pages, click on the small arrow button on the top right corner (highlighted in yellow) or scroll down to the bottom of the page.
The total number of payments that the expert has received is indicated in the top left of the screen (blue arrow), however, this number indicates the total payment events that have been made regardless of the number of companies your collaborator has been working with.