Add all of the ingredients except for the cannellini beans and corn to the Instant Pot.
Secure the lid, close the pressure valve, and cook for 15 minutes at high pressure.
Open the valve to quick release any pressure (this will allow the steam to escape and you'll be able to open the lid sooner than waiting for natural release).
Shred the chicken in the pot then add the cannellini beans and corn to the pot. Press the sauté button and cook for 5 minutes or until the beans and corn are heated through.