Share Buy-Backs and Treasury Shares in Hong Kong: A Companies Ordinance Guide

A share buy-back lets a Hong Kong company reacquire its own shares from a shareholder, returning capital, buying out a departing founder or investor, or tidying up the share register. It is a core tool in capital restructuring and in private equity exits, but it is tightly regulated: get the source of funds, the solvency statement or the timing wrong and the buy-back can be invalid, with personal exposure for the directors.

This guide explains how a Hong Kong company buys back its own shares under the Companies Ordinance (Cap. 622): the three permitted sources of funds, the out-of-capital procedure step by step, the directors’ solvency statement, stamp duty, and the common mistakes. It also covers the new treasury share regime, which since 2025 lets listed companies hold bought-back shares rather than cancelling them, and explains why that regime does not reach private companies. It is written for company owners and sponsors, and it is not a substitute for advice on a specific transaction.

A share buy-back is a transaction in which a company purchases its own issued shares. In Hong Kong it is governed by Part 5 of the Companies Ordinance (Cap. 622), which sets out when and how a company may buy back shares and how the buy-back must be paid for. Section 257(1) requires that the shares be paid for on the buy-back.

All companies, listed or unlisted, may buy back their own shares under Cap. 622, a change from the old Companies Ordinance (Cap. 32), which restricted out-of-capital buy-backs to private companies. For a private company, the shares bought back are then cancelled by default. Listed companies are subject to additional rules, including the HKEX Listing Rules, and since 2025 may hold bought-back shares in treasury (see below).

Buy-backs serve several commercial purposes:

• Founder or key employee exit, where the company reacquires shares from someone leaving the business.
• Buying out a minority shareholder who wishes to sell, by agreement.
• Returning surplus capital to shareholders where the company holds more than it needs.
• A private equity sponsor exit, where the company reacquires the investor’s shares as one route to realisation, a mechanism we use in our private equity and acquisition finance practice.
• Unwinding an employee share scheme when a participant leaves.

Section 257(2) of the Companies Ordinance permits a buy-back to be paid for from one of three sources, and only these three:

A buy-back paid out of distributable profits or the proceeds of a fresh issue does not require the out-of-capital procedure below. A buy-back paid out of capital does, and it is the route to get right. One important limit: under section 257(3), a listed company must not make a payment out of capital for a buy-back of its own shares on a recognised stock market. The out-of-capital route is, in practice, a private-company and unlisted-company tool.

Where a company funds a buy-back out of capital, the Companies Ordinance sets out a sequence that must be followed in order:

A treasury share is a share that a company buys back and holds, in its own name or through a nominee, rather than cancelling, so that it can resell or transfer it later. Until recently Hong Kong did not permit this: both the HKEX Listing Rules and the Companies Ordinance required repurchased shares to be cancelled.

That changed for listed companies. The HKEX Listing Rules were amended with effect from 11 June 2024 to remove the cancellation requirement, and the Companies (Amendment) Ordinance 2025, which commenced on 17 April 2025, amended Cap. 622 to enable Hong Kong-incorporated listed companies to hold bought-back shares as treasury shares and later cancel, transfer or sell them. On a disposal of treasury shares, the listed company must deliver a return to the Registrar within 15 days, using the new Forms NSC22 or NSC23.

The solvency statement is where directors carry personal risk. It must be made by all the directors, and each must have reasonable grounds for the opinion that the company satisfies the solvency test, which looks at whether the company will be able to pay its debts. Directors are expected to make proper enquiries into the company’s affairs and prospects before signing, and may take professional advice where the position is not clear. Making a solvency statement without reasonable grounds is an offence and exposes the directors personally, so this step should never be treated as a formality.

A buy-back does not, in itself, give rise to Hong Kong profits tax on the company, and Hong Kong has no general capital gains tax. Stamp duty, however, needs attention. The transfer of shares back to the company on a buy-back may be subject to Hong Kong stamp duty on the instrument of transfer, under the Stamp Duty Ordinance (Cap. 117), at the current ad valorem rate of 0.1% on each of the buyer and seller (0.2% in aggregate), plus a fixed duty of HK$5. Because the treatment of a buy-back transfer is not free from doubt, the position should be confirmed with the Stamp Office rather than assumed. The exiting shareholder should also consider their own tax position.

Most buy-backs that go wrong fail at one of these points:

A buy-back is one way to return value to shareholders; a court-free reduction of share capital under sections 215 to 225 of Cap. 622 is another, and the two are sometimes combined. A capital reduction has its own solvency-statement procedure and is a distinct topic, so we treat it separately rather than in detail here.