Notice of System Maintenance
HKEX will be performing scheduled system maintenance from 5:00 pm (HKT) to 11:59 pm (HKT) on 13 Dec 2025 (Saturday). During this period, our websites, email notification and other data services may be affected. Users may also experience interruptions or slow responses of other website services. Thank you for your patience and understanding.
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ESS Operation Hours and Contact Us

 ESS Operation Hours
 
 Publication Related Matters & Registration Matters
 Monday to Friday (business days only) 06:00 - 23:00
 Non-business day immediately preceding a business day 18:00 - 20:00
 (To assist us in improving our service to you, telephone calls may be recorded.)
 
 Listing Related Matters
 Monday to Friday (business days only)  09:00 - 18:00
 
Contact Us
 
 ESS Hotline Numbers:
 Publication Related Matters & Registration Matters  + 852 2840 3460
 Listing Related Matters  + 852 2840 3577
 
 By Email:  
 Publication Related Matters & Registration Matters    ESSHotline@hkex.com.hk
 Listing Related Matters   esubmission@hkex.com.hk


Updated 01 Mar 2024