Rainbow Corporation: Abnormal fluctuations in stock trading, there are no undisclosed major issues that should be disclosed.

Rainbow Corporation announced that the company's stock price has experienced abnormal fluctuations over two consecutive trading days on June 16 and June 17, 2026, with the cumulative deviation of the closing price exceeding 20%. After conducting a self-inspection and consulting with the controlling shareholder and actual controller, as of the date of the announcement, there are no major undisclosed issues that should be disclosed. The company's production and operation are normal, and its products have not entered the semiconductor packaging-related testing field. The company reminds investors that the stock has experienced significant short-term fluctuations, with a high price-to-earnings ratio compared to the industry average, and declining performance. The stock price increase is not in line with the performance, so investors should be aware of the risks.