Are you able to share more information about how your tables and columns are setup?
One idea: If you are using a view of the Activities Table, and that table has all the data about interactions, then you can use a filter in the view to only show interactions relating to a specific company. For more information on filters, Coda has an article here: https://help.coda.io/formulas/filtering-your-tables
Another idea: Use the List formula (https://coda.io/formulas#List) to group all of the relevant data.
Happy to provide a more detailed explanation if needed, but that would require some additional information about the document.