IPG Photonics Corporation revised earnings guidance for the fourth quarter ended December 31, 2016. For the quarter, the company expected to report revenue of approximately $280 million compared with the previously guided range of $255 million to $270 million, and earnings per diluted share in the range of $1.39 to $1.42, including a benefit of $0.02 from foreign exchange, compared with previous guidance of between $1.17 and $1.32 per diluted share.