The passenger vessel hit the rock in Milford Sound about noon yesterday.
Radio New Zealand reported the passenger vessel, operated by Real Journeys, hit the rock about noon.
A company spokesperson said the injured people were treated by staff on board and checked by a St John medic when they returned to shore.
The boat, which appeared to have superficial damage, had been taken out of service for a full inspection.
An internal investigation was under way, and Maritime New Zealand had been notified.
