Add salmon and teriyaki marinade in a large plastic resealable bag. Marinate for at least 30 minutes.
Place steamer rack in pressure cooker. Place salmon on top of steamer rack then add fish stock and close and lock lid. Adjust time to 5 minutes and press "start/stop".
When done, quick release and make sure all pressure is released before opening lid. Carefully open lid and remove salmon. Serve with extra teriyaki marinade on the side.