Under Chapter 3A of the Main Board Listing Rules, an issuer must appoint an overall coordinator by a written engagement agreement; the overall coordinator conducts specified activities under paragraph 21.2.3 of the SFC Code of Conduct, and the agreement must at least state its roles and responsibilities, fee arrangement and payment schedule. For a New Listing placing involving bookbuilding, overall coordinators must be appointed and announced within 2 weeks after submission (or re-filing) of the listing application, and at least one must also be appointed as an independent sponsor (a sponsor-overall coordinator). Basis: Main Board Listing Rules 3A.35, 3A.36, 3A.37 and 3A.43.
The links above lead to official sources such as HKEX and the SFC. The explanation on this site summarises them and may differ from the official definition; the official documents prevail.
This page explains the HK IPO term "Overall Coordinator" and links to related terms. Definitions are compiled from HKEX Practice Note 18 and the Listing Rules, for understanding subscription rules only — not investment advice.