Hi there,
The daily NAV is right on that page. Keep in mind, this is based on end of trading day and is not a perfect correlation to Bitcoin price. As an example, right now it shows QBTC has having a NAV of $49.0614 per share as of close of markets today (Jan 12). It closed trading at $57.30 today which means it is now trading at a 16.8% premium to NAV.
Worth noting, it has been a several months since it was trading at a discount. Over the past couple of months, I've been checking every once in a while and it has always traded at a premium. At one point it was bout 30% premium. The easy of access to buy/sell QBTC is likely why it is trading at a premium to NAV. If Bitcoin drops and has sustained bear pressure, that premium could to turn into a discount.
Mat