Sinopec Oilfield Service Corporation disclosed its monthly return for October 2025. The total authorised share capital remained RMB 18,984,340,033, composed of A shares and H shares with no increase or decrease reported during the period.

For A shares (stock code 600871 on the Shanghai Stock Exchange), there were 13,547,012,351 issued shares and no treasury shares at the end of the month, remaining unchanged from the previous month. For H shares (stock code 01033), the count also remained unchanged, at 5,410,033,482 shares issued without treasury shares.

No warrants, convertibles, share options, or other arrangements related to share issuance were reported for the period. The submission confirms compliance with applicable rules and regulations, without any changes to the company’s share structure in October 2025.