The instructions for the forms W-8 indicate that the form should be filled out using the information of the beneficial owner of any disregarded entity that is requested to provide a form W-8.
If the beneficial owner is a foreign individual, a W-8BEN should be provided.
If the beneficial owner(s) is a foreign entity other than an individual or intermediary, then a W-8BEN-E should be provided and the chap. 3 status provided should be that of the beneficial owner.
If the beneficial owners(s) is an intermediary, then a W-8IMY should be provided via PDF.
If you have any further questions, please reach out to taxes@angellist.com for guidance.