Opto Tech Corporation announced earnings results for the first quarter ended March 31, 2021. For the first quarter, the company announced sales was TWD 1,583.411 million compared to TWD 1,164.079 million a year ago. Operating income was TWD 282.159 million compared to TWD 132.642 million a year ago. Net income was TWD 245.059 million compared to TWD 121.549 million a year ago. Basic earnings per share was TWD 0.66 compared to TWD 0.32 a year ago. Diluted earnings per share was TWD 0.65 compared to TWD 0.32 a year ago.