Subscribing to a Hong Kong IPO means applying through a broker for shares in the public offering before the stock lists. This page walks through the stages from offering to listing in time order, with the basic concepts behind each. It explains concepts and rules only and makes no judgement on any IPO.
An IPO takes applications during the offering period, allots shares after it closes, then lists. The prospectus page on this site shows a stock's timeline with the stages in the table below. Brokers close applications earlier than HKEX does; the broker's own notice prevails.
| Stage | Description |
|---|---|
| Offering period | The window in which public offering applications are accepted, usually several trading days |
| Broker application deadline | Set by each broker, earlier than the HKEX close, and varies by broker |
| HKEX offering close | Public offering applications formally close; application money is frozen from here |
| T-2 broker results | Two trading days before listing, some brokers start announcing results |
| T-1 HKEX allotment announcement | The issuer publishes the allotment results announcement with oversubscription, clawback and tier-level allotment |
| T-1 grey market | Off-exchange trading the day before listing; not part of the formal market |
| T listing day | Shares begin formal trading on HKEX |
T is the listing day; T-1 and T-2 are the first and second trading days before it. These stages are the usual arrangement under the FINI platform (launched 22 November 2023); before that, brokers typically announced results only on T-1.
Hong Kong IPOs are applied for in lots. The number of shares per lot is set by the issuer in the prospectus and differs by IPO. The application amount is lots times shares per lot times the offer price. Applications can only be made at the tiers listed in the prospectus, each tier corresponding to a fixed number of lots. One lot is the smallest unit and usually has the most applicants.
The global offering has two parts: the public offering for Hong Kong retail investors and the international placing for institutions. Retail investors subscribing through brokers take part in the public offering. At launch the public offering is only a small part of the global offering; the more oversubscribed the deal, the more shares are clawed back from the international placing. Cornerstone investors are institutions that sign subscription agreements before the offering; their shares are outside the public offering and the prospectus discloses their names and amounts.
The public offering is divided by application amount at HK$5 million: orders of up to HK$5 million are in Pool A and larger orders are in Pool B. Each pool receives 50% of the public offer shares and is allotted separately. Clawback rules and allotment rates are covered in How Hong Kong IPO Allotment Rates Work.
Application money is frozen from the offering close until it is refunded or released. Frozen money cannot be used meanwhile, which is a cost of applying. Brokers commonly offer margin financing for IPO applications; clients apply with borrowed money and pay interest and fees, on terms that vary by broker. The frozen capital calendar is on this site.
The grey market is off-exchange trading on the day before listing, offered by some brokers. Its price reflects expectations of the IPO but is not a formal market price and need not match the actual first-day performance.
The IPO glossary explains Mechanism A, Mechanism B, clawback, greenshoe, cornerstone investors and more. IPO allotment history lists oversubscription, 1-lot allotment rates and first-day returns since 2025. The IPO list leads to each stock's prospectus information, allotment forecast and subscription calculator.
Rules follow Chapter 4.14 of the HKEX Listing Rules and related announcements; specifics are subject to each IPO's prospectus and broker notices. This page explains concepts and rules and is not investment advice; IPO subscriptions can result in losses.
