Current approximate numbers were given some weeks ago by Otoh himself and Babygiraffe in the Dash Nation Slack. They were clearly lower than TheTrollGuy's made-up allegations, notably Otoh's: 100 to 130 MNs if I remember correctly.

Otoh sold a lot of MNs lately, OTC of course. And no price crash, because “Every MN sold is an MN bought” (avidly).

Anyway, personally I would not give a flying fuck if Otoh had 400+ masternodes. Wishing the best for him and other whales who were smart enough to invest early in Dash. The results are here.