Eastech (TPE:5225) booked operating revenue of NT$893 million for May, up 11.8% year on year from NT$798.8 million, according to a Tuesday Taiwan Exchange filing.
Shares jumped about 10% in Wednesday's late morning trade.
However, cumulative revenue for the first five months of 2026 fell 8.6% year on year to NT$4.05 billion, compared with NT$4.43 billion a year earlier.