Yes, there are various ways of approaching this. Assuming that you have these contacts IDs in a sheet, you could either import a list with only the Contact ID column. (HubSpot might require an additional column in this import file, that could be the Email.) During the import process, you can choose to update contacts by Contact ID. In the last step of the import process, you can create a list from the import file.
Yes, there are various ways of approaching this. Assuming that you have these contacts IDs in a sheet, you could either import a list with only the Contact ID column. (HubSpot might require an additional column in this import file, that could be the Email.) During the import process, you can choose to update contacts by Contact ID. In the last step of the import process, you can create a list from the import file.