HOUSTON (AP) -- Waste Management is citing cost controls and improved yields for a 36% spike in its first first-quarter earnings.

The Houston company reported net income of $228 million, or $0.49 per share, for the quarter that ended in March, versus $168 million, or $0.36 per share, last year. It earned $0.40 per share in the prior year on an adjusted basis.

Revenue increased nearly 2% to $3.4 billion from $3.34 billion, with a small boost from higher prices and fees.

Analysts polled by FactSet were anticipating earnings of $0.44 per share on revenue of $3.41 billion.

The company said business in April indicated a typical, seasonal upturn, but that it's still too early to give further guidance for the second quarter.

Shares of Waste Management added $1, a more than 2% increase, to reach $42.99 by midmorning Thursday, outpacing broader market gains.