Hello @Guido,
Welcome to the Hubspot Community and thank you for your question.
It isn’t possible to export Companies with associated contact properties as columns in one file, however I came up with a workaround that might come close to what you are looking to accomplish.
You can create a new view in contacts, add the desired filters on the left, and edit your columns so that the information that you want in the Excel file is shown. You can then export the view of contacts, and select “Include only current columns” (or you can choose to include all properties) This will allow you to see your contacts, their phone numbers, email addresses, etc, as well as the Company that they are associated with. The company name is the only piece of company information that you’d be able to add to a contact export, because “Associated Company” is the only contact proeprty with company information.
Let me know if you have any questions, or if you’d like me to clarify anything.
Thanks,
Brett