In June of 2015, the price of BTC was about $240 each.
If we assume half the investment went into bitcoin, it means they acquired $115m/2/($240/BTC) = ~240,000 BTC
At today's price of $8000/BTC, assuming they never sold, those coins would be worth $1.9B. So it is plausible they hold more than $1B in bitcoin.