So he sold 8mm shares a few months ago, and another 5mm shares now, if they sold for yesterday's low of 79 buckeroos, that's 1.027 billion dollars before taxes. The current capital gains tax on that amount is roughly 205.5 million... so he would clear 821.6 million cash. Obviously, those numbers aren't accurate because he cashed out chunks at different times and price points, but it's eye-wateringly crazy amounts close to that. This also doesn't account for the TKO WWE merger and if that qualifies his stock as new stock, if so he'd possibly owe income tax up to 37% on that if it's considered short-term gains.
Either that woman is about to get a ton of cash tossed at her, or he's planning to hide the wealth in some way.