IPG Photonics (IPGP) 8-K/A Results of Operations and Financial Condition

Exhibit 99.1

IPG PHOTONICS CORPORATION

SUPPLEMENTAL SCHEDULE OF STOCK-BASED COMPENSATION

	Three Months Ended September 30,						Nine Months Ended September 30,
(In thousands)	2016			2015			2016			2015
Cost of sales	$	1,615		$	1,404		$	4,579		$	3,919
Sales and marketing	385			522			1,297			1,466
Research and development	1,268			1,077			3,581			2,940
General and administrative	2,395			2,010			6,642			5,550
Total stock-based compensation	5,663			5,013			16,099			13,875
Tax benefit recognized	(1,817		)	(1,542		)	(5,166		)	(4,450		)
Net stock-based compensation	$	3,846		$	3,471		$	10,933		$	9,425