BlackRock (NYSE:BLK) reported Q4 operating EPS of $3.06, topping consensus estimates of $2.98.Revenues in the quarter came in at $2.23 billion, slightly lower than estimates for $2.24 billion.Operating margin slipped 0.7% year-over-year to 40.0%.Blackstone (NYSE:BX) has potential upside of 11.7% based on a current price of $15.45 and an average consensus analyst price target of $17.25.