There is a very useful extension called "Extended Reports" that has an Activities report that allows you to pull information about the Source, Target and Assigned contacts, but if you are looking for information about an organization that is related to one of those contacts but is not directly linked to the activity (and you don't have access to a developer), then you'd probably be better off searching twice:
- Search > Advanced Search
- Search 1:
- Select "Display Results as" = Activities
- Enter desired search criteria for Activities
- Search and Export search results
- Search 2:
- Without changing the criteria you used to search for the activities, click to expand the Edit Search Criteria bar
- Select "Display Results as" = Related Contacts
- Select the relevant relationship
- Export results
- Use a vlookup function to match data accordingly (facilitated if you export contact IDs)
Hope this helps!
Tamar