Yieh Hsing Enterprise (TPE:2007) posted operating revenue of NT$448.1 million for May, down 6.9% from NT$481.4 million in the same month last year.
The decline reflected weaker business activity during the period, according to a Tuesday Taiwan Exchange filing.
For the first five months of 2026, cumulative revenue fell 27% to NT$1.90 billion from NT$2.59 billion a year earlier, the stainless steel manufacturer said.