Humana Wednesday reported $545 million in second quarter profits as the health insurer’s medical cost trends fell in line with expectations.

Humana raised its annual profit forecast on Wednesday, as the U.S. health insurer bets on its efforts to rein in higher medical costs that have plagued the sector, sending its shares up nearly 5% in premarket trading.

The Kentucky-based company’s results are a bright spot in what’s otherwise been a gloomy quarter for health insurers. Humana says it has a handle on snowballing medical costs after taking a conservative stance heading into the year.