TYK Medicines, Inc. (PRC-incorporated, listed in Hong Kong) reported no change in its share structure for the month ended 31 May 2026, according to the Monthly Return filed on 2 June 2026.

Registered and Issued Share Capital • Registered share capital: 380.07 million ordinary H shares, each with a par value of RMB 1, unchanged from April. • Issued shares (excluding treasury stock): 380.07 million. • Treasury shares: none. • Total issued shares outstanding therefore remain 380.07 million.

Public Float Compliance The company confirmed compliance with the Hong Kong Main Board’s minimum public float requirement—25% of issued H shares—as of 31 May 2026.

Corporate Actions • No share issuances, cancellations, or repurchases occurred during the month. • No share options, warrants, convertible securities, or other equity-linked instruments were outstanding or exercised. • No Hong Kong Depositary Receipts were in issue.

Governance The return was signed by Executive Director, Chairman and Chief Executive Officer Mr Wu Yusheng, affirming the accuracy of the disclosed information.