Sinopec Shanghai Petrochemical Company Limited (ASX: 600688) has announced that its A-shares experienced abnormal trading activity. The closing price deviation over three consecutive trading days from June 2nd to June 4th, 2026, cumulatively exceeded 20%.

This constitutes a significant price movement as defined by the Shanghai Stock Exchange trading rules. The company has conducted an internal review and made written inquiries to its controlling shareholder and ultimate controller. As of the date of this announcement, it has been confirmed that there is no undisclosed material information concerning the company, its controlling shareholder, or its ultimate controller.

Furthermore, the company acknowledges significant market attention regarding media reports on its T1000-grade high-performance carbon fiber. The company provides the following clarification on the matter.

The T1000-grade high-performance carbon fiber referenced in recent reports is a 12K small-tow product. The current batch of this product has not yet generated sales revenue.

It is anticipated that any future sales revenue from this product will constitute a relatively low proportion of the company's overall revenue and profits. Consequently, it is not expected to have a material impact on the company's core business operations or profitability.

Aside from the aforementioned circumstances, the company states that, as of the announcement date, it is not aware of any other media reports or market rumors that could significantly influence its share price. The company also confirms it is not involved in any trending concept-related matters.