April 25 (Reuters) - U.S. exchange operator Nasdaq Inc on Wednesday reported a 14.6 percent rise in quarterly revenue, helped by higher U.S. trading volumes.
The company's net income attributable rose to $177 million, or $1.05 per share, in the first quarter ended March 31, from $168 million, or 99 cents per share, a year earlier.
Revenue, excluding transaction-based expenses, rose to $666 million from $581 million.
The company lowered its 2018 adjusted operating expense guidance to $1.30 billion to $1.34 billion from $1.38 billion to $1.42 billion. (Reporting by Nikhil Subba in Bengaluru; Editing by Sriraj Kalluvila)