You can do this in a couple of ways. If you just want the list of contacts, I would probably create an active list using the Workflow criteria for list membership. From here, you can choose which workflow you'd like to see and whether they are actively enrolled or not.
Alternatively you can go to the workflow itself and see folks that are enrolled.
I hope that helps, but please let me know if you you need some support on that.
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Josh Curcio HubSpot support and inbound marketing for OEMs, contract manufacturers, and industrial suppliers. HubSpot Platinum Partner & HubSpot Certified Trainer