How about adding an introductory instruction statement below the form title but above all the fields?
Ex. 1
Register Here
Enter your information below:
Name:
Email:
etc.
If you're wanting company details, you'll need to be specific about whose or what's information is being requested. The person filling out the form in the example below should easily understand they are being asked for their name. Assistants completing these forms will simply use their boss's name (cued by the request for title).
Ex. 2
Register Here
Enter applicable information below:
Name: (If you think there is any possibility of confusion here, add Your)
Company Name:
Your Title:
Company Email:
Clearly defining the who and what of requested input is always appreciated by users who are interested in revealing their information.