Public Float Requirement in Hong Kong Listings: Minimum Shareholding Rules and Waivers

The minimum public percentage and the three market-capitalisation bands

Rule 8.08 opens from the premise that there must be an open market in the securities for which listing is sought. The minimum percentage of the class that must be held by the public at listing is set by reference to the expected market value of that class at the time of listing, and it steps down as the expected market value rises.

Where the expected market value of the class does not exceed HK$6,000,000,000, at least 25% must be held by the public. Where the expected market value is over HK$6,000,000,000 but does not exceed HK$30,000,000,000, the requirement is the higher of the percentage that would give the securities held by the public an expected market value of HK$1,500,000,000, and 15%. Where the expected market value is over HK$30,000,000,000, the requirement is the higher of the percentage that would give the public holding an expected market value of HK$4,500,000,000, and 10%.

For the purpose of computing the expected market value and the minimum percentage, note 1 to Rule 8.08 provides that only shares in issue at the time of listing are counted, and treasury shares are excluded. Finance teams modelling the float early should therefore work from the issued share count at listing net of treasury shares, not from a post-incentive or fully diluted figure.

The rule does not express these thresholds as guarantees of admission. It says there "must be an open market", and it sets out what that "will normally mean". The word "normally" matters: the percentages are the standard, and a departure from them runs through the waiver route described below. Alongside them sits Rule 8.07, under which the issuer must demonstrate sufficient public interest in its business and in the securities. Rule 8.07 gives no fixed figure; it is a qualitative demonstration, and nothing in the Listing Rules converts it into a numeric test.

Shareholder spread and concentration limits

The percentage test does not stand alone. Rule 8.08(2) requires that at the time of listing there be an adequate spread of holders of the securities to be listed, and provides that in all cases there must be at least 300 shareholders. Rule 8.08(3) caps concentration: not more than 50% of the securities in public hands at the time of listing can be beneficially owned by the three largest public shareholders.

Neither sub-rule displaces the other. A company can satisfy the 25% headline figure and still fail Rule 8.08(3) if the bulk of that float is concentrated in a small number of public hands, which is why cornerstone and placing allocations should be stress-tested against both the 300-shareholder floor and the three-largest-public-shareholder ceiling before the book is closed.

Free float: a separate test

Rule 8.08A imposes a condition that is distinct from the public percentage, and it should not be described as a relaxation of it. Rule 8.08A applies to securities in the class that are held by the public and are free of any restriction on disposal, whether arising by contract, the Listing Rules, applicable law or otherwise.

That free float must either be at least 10% of the total number of issued shares in the class excluding treasury shares, with an expected market value at listing of not less than HK$50,000,000; or have an expected market value at listing of not less than HK$600,000,000. The reference to restrictions arising from the Listing Rules means lock-up, dealing prohibition or similar arrangements need to be identified early, because shares subject to them can count towards the public percentage but not towards the free float calculation.

Who counts as "the public"

The public is not simply anyone who is not a director. Rule 8.24 excludes connected persons from the public, and also excludes persons whose acquisition of the securities has been financed, directly or indirectly, by a connected person, and persons who are accustomed to take instructions from a connected person in relation to the acquisition, disposal, voting or other dealing in those securities. In practice, nominee and structured holdings that are economically directed from inside the connected-person group do not swell the float.

Rule 8.23 sits next to this as a distribution principle, requiring that offers be made on a fair basis. Where there is a strong retail or employee element of the offer, the rules provide for allocation mechanisms designed to keep that distribution fair.

An issuer preparing its float analysis should therefore build the public denominator from the share register rather than from the placing list, testing each holder against Rule 8.24 before counting it.

Waivers at listing

Rule 8.08(1) can be waived at the time of listing. That possibility follows from both parts of the framework: Rule 8.08 itself frames the minimum percentage as what an open market "will normally mean", and the note to Rule 13.32B states expressly that where an issuer was granted a waiver from strict compliance with the minimum percentage of public float prescribed by Rule 8.08(1), as amended from time to time, at the time of listing, the Initial Prescribed Threshold means the minimum percentage of public float prescribed under that waiver.

The effect of the waiver is therefore not merely to permit admission. It resets the reference point for the issuer's continuing obligation: the percentage set out in the waiver becomes the Initial Prescribed Threshold for that issuer.

Companies considering this route should note the limits of the available record. No official document setting out a specific application form or a prescribed step-by-step filing process for applying to the Exchange for a reduced public float percentage has been identified, and none is described here. What can be said is that the waiver is granted at the time of listing, by reference to Rule 8.08(1), and that its percentage becomes the ongoing threshold.

A different regime applies to secondary listings. Rule 19C.11 lists Rule 8.08(1) and Rule 8.08A among the provisions that are expressed as not applying, so neither the percentage table nor the free float condition applies automatically in that case. Rules 8.08(2) and 8.08(3) are not on that list, so the requirement for at least 300 shareholders and the 50% ceiling on the three largest public shareholders continue to apply. Care should be taken to keep Main Board numbering distinct from GEM numbering; the analysis here is Main Board only.

The continuing obligation after listing

The float requirement does not expire at admission. Rule 13.32B requires that the public float be maintained at all times at one of two levels. The first is at least 25% of the total number of issued shares in the class, or the lower minimum percentage prescribed under Rule 8.08(1) applicable at the time of listing — that lower figure being the Initial Prescribed Threshold, which is where a listing-time waiver feeds through.

The second is the Alternative Threshold: the issuer may instead maintain a public float with a market value of at least HK$1,000,000,000, representing at least 10% of the total number of issued shares in the class excluding treasury shares.

For an issuer without a waiver whose expected market value at listing was over HK$6,000,000,000 but not over HK$30,000,000,000, the relevant continuing reference point is the minimum percentage originally prescribed under Rule 8.08(1), not a fresh 25% test. For an issuer with a waiver, it is the waived percentage. Either way, once listed the issuer has two possible routes, and treasury shares continue to be excluded from the denominator under the Alternative Threshold limb.

Non-compliance, announcements and cancellation

Rule 13.32E addresses what happens when an issuer becomes aware that it does not comply. The issuer must take steps to restore the required public float, and it must publish an announcement within one business day. While the non-compliance continues, the issuer must keep the position updated, and the rule provides for monthly updates.

The consequence of failing to cure is set out in Rule 13.32G(3): where a significant shortfall in public float continues for 18 months without being remedied, the Exchange will cancel the listing of the issuer's shares. The 18-month period runs against the unremedied significant shortfall, so the practical lesson for company secretaries is that the one-business-day announcement should be treated as the start of a documented remediation, not as a disclosure event in isolation.

Key takeaway

The float requirement is a cluster of tests at listing — a market-capitalisation-banded percentage under Rule 8.08(1), a 300-shareholder floor and a 50% three-largest-holder ceiling under Rules 8.08(2) and 8.08(3), and a separate free float condition under Rule 8.08A — applied only to shares that Rule 8.24 treats as held by the public. A waiver of Rule 8.08(1) granted at listing lowers the starting point but not the standard: the waived percentage becomes the Initial Prescribed Threshold that Rule 13.32B requires to be maintained at all times, with a one-business-day announcement and monthly updates under Rule 13.32E if it is breached and cancellation of listing under Rule 13.32G(3) if a significant shortfall goes unremedied for 18 months.