Coretek Opto Corporation announced earnings results for the half year ended June 30, 2021. For the half year, the company announced sales was TWD 276.114 million compared to TWD 228.571 million a year ago. Net income was TWD 19.590 million compared to TWD 2.351 million a year ago. Basic earnings per share was TWD 0.3 compared to TWD 0.04 a year ago.