The smallest application unit of a Hong Kong IPO. The number of shares applied for must be a multiple of the lot size, which the issuer sets in the prospectus and which differs by IPO. On 30 June 2026 HKEX announced a new board lot framework implemented in phases from 2 July 2026: board lot units are standardised to eight options of 1, 50, 100, 500, 1,000, 2,000, 5,000 and 10,000 shares, with guidance of a board lot value floor of about HK$1,000 and a ceiling of HK$50,000 (for issuers with board lot units above 100 shares); new applicants filing on or after 2 July 2026 must comply with all components. Before that, HKEX practice required a board lot value of at least HK$2,000. Basis: HKEX announcement of 30 June 2026 and Guidance Letter HKEx-GL17-10.
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 "Lot Size" 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.
