HUANENG POWER has announced that its A-shares experienced abnormal trading volatility. The cumulative deviation in the closing price over three consecutive trading days—May 28, May 29, and June 1, 2026—exceeded 20%, meeting the criteria for abnormal trading fluctuations as defined by the Shanghai Stock Exchange's trading rules.

The company has conducted a self-inspection and verified with its controlling shareholder's parent company. As of the date of this announcement, the company's production and operations are normal, and there are no material events that should have been disclosed but have not been.

For the first quarter of 2026, the company reported a net profit attributable to shareholders of approximately RMB 4.484 billion, representing a year-on-year decrease of 9.83%. This decline was primarily due to the combined effects of a decrease in domestic power generation volume, a drop in the average on-grid settlement price, and lower fuel costs.

Investors are advised to pay attention to the risks associated with the company's performance fluctuations and to make prudent and rational investment decisions.