I may be wrong (though I doubt it), but I would guess Ned has been far more interested in lining his pockets with dirty fiat than hiding stake on Steem. If he actually had any interest in Steem, he would have actually invested in building it instead of looting most of the funds, and then lying (or hiring someone to lie for him) about needing layoffs, slow development, no marketing, and "survival model" due to being out of money
Any hidden stake is stake he could sell with no accountability whatsoever. No reason to think that he didn't.
That supposition holds much water, how do we find out?
There are only 300m coins, seems we could track large chunks of them pretty easy.
I was wondering how poloniex ripped off 12m steem without a peep from the community.
Looks like they bought them from Ned.