MARLBOROUGH, Mass., July 30, 2024 (GLOBE NEWSWIRE) -- IPG Photonics Corporation (NASDAQ: IPGP) today reported financial results for the second quarter ended June 30, 2024.  Three Months Ended June 30,     Six Months Ended June 30,    (In millions, except per share data and percentages) 2024   2023   Change   2024   2023   Change Revenue$257.6  $340.0   (24)% $509.7  $687.1   (26)%Gross margin 37.3%  43.4%      38.0%  42.9%    Operating income$12.0  $72.1   (83)% $31.1  $147.5   (79)%Operating margin 4.7%  2 ...