Capital Markets & Corporate Compliance
A summary of the rules on backdoor listing and reverse takeovers in Hong Kong
Overview of Reverse Takeovers (“RTOs”)
With the prevalence of backdoor listings in recent years whereby investors acquire control of a listed issuer primarily for its listing status, the Hong Kong Stock Exchange (“HKEX”) has highlighted the associated risks of market manipulation, particularly when new businesses are commenced after a takeover but insufficient information is disclosed publicly, particularly in relations to its business sustainability. This may lead to increased risks for existing minority shareholders and undermine investors’ confidence in Hong Kong’s capital markets.
Although the SFC’s Takeovers Code already provides detailed provisions requiring new controlling shareholders, as offerors, to make a mandatory general offer, issues arise post-acquisition when the listed issuer commences a new area of business or carry out a substantial acquisition on a new business area initiated by the new controlling shareholder. In these cases, HKEX may consider the transaction as RTO by the listed issuer, the consequence of which is that the listed issuer must re-issue a listing document containing disclosure information matching that required for a new listing application, as well as the requirement to appoint a sponsor to conduct due diligence. The procedure must be approved by the HKEX Listing Committee, and the RTO must be conditional on shareholders’ approval at a general meeting.
This article explores the key rules and cases on RTO to assist investors as new controlling shareholders as well as listed issuer to understand the legal implications of changing listed companies’ principal businesses and launching new operations.
What constitutes RTO?
Bright Line Test
Generally, HKEX views the following transactions as RTOs ("Bright Line Test"):
Transactions that involve a change in control (i.e. 30%) of the listed issuer (except at the subsidiary level); and
a very substantial acquisition (i.e., acquisition where the applicable percentage ratio of the size test is 100% or more) occurs at the time of, or within 36 months of the change in control of the listed issuer.
Principle-Based Test
In addition to the Bright Line Test, if HKEX considers that the transaction is one or a series of transactions intended to achieve the listing of acquired assets while circumventing the new listing requirements (“Principle-Based Test”), it will also be treated as RTO even if there has not been a change in control.
In assessing the Principle-Based Test, HKEX will consider the following factors:
Size of acquisition relative to the issuer:
Whether after the issuer undertakes an acquisition of significant size, its existing principal business will become immaterial after the transaction;
Acquisition resulting in a fundamental change in the issuer’s principal business:
Whether the issuer acquires a target business that is completely different from its existing business and that target business is substantially larger than its existing business;
Fundamental change refers to acquisitions that are not part of the issuer’s business strategies or is unrelated to the issuer’s existing business, (i.e. transactions that do not involve expansion or diversification of existing businesses, or acquisitions that are inconsistent with the issuers’ size and resources);
Nature and scale of the issuer’s business before the acquisition:
Whether the scale of the issuer’s existing business is small, and the issuer would in substance be changed to operating the new target business after acquisition;
Quality of the acquisition targets:
Whether the target business is itself suitable for listing, such as acquisitions of early exploration companies or businesses that contravene laws and regulations;
Change in control or de facto control of the listed issuer:
Whether there is a change in the controlling shareholder, single largest substantial shareholder who is able to exercise effective control, directors and/or senior management; and
Events and transactions which together with the acquisition form a series of transactions and/or arrangements to circumvent the RTO Rules:
Whether the transactions and arrangements form a part of the series by taking place in reasonable proximity to each other (normally within a 36-month period) or are otherwise related.
Restrictions on Disposal
The Listing Rules also impose restrictions on disposal or distribution in specie (or a series of disposals or distributions) that involves all or a material part of the issuer’s existing business at the time of, or within 36 months from the change in control. The restrictions on disposal are intended to supplement the Bright Line Test to prevent investors from re-sequencing RTO transaction by acquiring a new business before disposing its original business, thereby circumventing the Bright Line Test.
Additionally, the Listing Rules impose prohibitions on large-scale issuances of securities for cash that involve or lead to a change in control or de facto control of the listed issuer, when the proceeds are used for acquisitions and/or to launch new businesses that are expected to be significantly larger than the issuer's existing principal businesses.
II. Compliance Requirements of RTO
Where a transaction is ruled as RTO, the listed issuer will be treated as if it were a new listing applicant. Rule 14.54(1) requires that:
The acquisition target(s) must meet the suitability listing requirements (Rule 8.04) and the new listing track record requirements (Rule 8.05, 8.05A or 8.05B); and
The enlarged group must meet all the new listing requirements under Chapter 8 of the Listing Rules (except Rule 8.05).
Where HKEX considers that a series of transactions and/or arrangements constitute RTO or an extreme transaction, the entire series of acquisitions should, as a whole, meet the new listing requirements of Rule 8.05. The issuer is required to provide sufficient information to HKEX to demonstrate that the acquisition targets can meet Rule 8.05, including financial information of the targets based on accountant’s report or audited financial information.
RTO must be made conditional on approval by shareholders in general meeting and any shareholder and his close associates who have a material interest in the transaction will be required to abstain from voting on the relevant resolution.
III. Recent Listing Decisions on RTOs
Discloseable Transaction amounting to RTO (Case 1 of HKEX-GL104-19)
In sample case 1 of HKEX-GL104-19, HKEX deemed a discloseable transaction to be RTO. This is contrary to the common accepted view that RTO applies only to very substantial acquisition or at least a major transaction under the Listing Rules.
Company A, a hotel business operator, proposed to acquire a majority stake in the target company that was newly formed to carry out a natural gas project. The target company has signed contracts but has yet to commence operations or record revenue. The acquisition was a disclosable transaction based on the size test.
HKEX considered that the acquisition was an attempt to circumvent new listing requirements under the Principle-Based Test under Rule 14.06B:
i. The target company’s projected profitability would be significantly larger than Company A’s existing business;
ii. The target company’s natural gas business was different from, and unrelated to, Company A’s existing business;
iii. The acquisition would lead to a fundamental change in Company A’s principal business given the target company’s significant size of business; and
iv. The target company had not generated any revenue.
2) Target Company Meeting New Listing Requirements (Case 15 of HKEX-GL104-19)
In sample case 15 of HKEX-GL104-19, Company A operates a property leasing and education equipment business, contributing over 95% of its revenue in recent years. Company A proposed to acquire a target company from Company X (who has been Company A’s controlling shareholder for over three years). The target company primarily engages in financial leasing and factoring services in the PRC, and it is 10 to 35 times the size of Company A’s existing business.
While HKEX considered the proposed acquisition would have the effect of achieving a listing of the target company’s business, it agreed to classify the transaction as an extreme transaction, rather than a RTO, as: 3)
i. The target company could meet the new listing requirements (Rule 8.05(1)) and the suitability for listing requirement; and
ii. Company A met the eligibility criterion set out in Rule 14.06C(1)(a) as it had been under control of Company X for more than 36 months and the proposed acquisition would not result in a change in control of Company A.
3) No Fundamental Change to Principal Business – (Case 11 of HKEX-GL104-19)
In sample case 11 of HKEX-GL104-19, Company A, a listed company, operated port terminals in the PRC and proposed a merger with the target company which also operated port terminals in the PRC. The target company is controlled by Company X and Company X is the controlling shareholder of Company A. About a year ago, Company Y acquired 51% equity interest in Company X which constituted a change in control of Company A.
The proposed merger would constitute RTO under the Bright Line Test as it was a very substantial acquisition from Company X (being an associate of Company Y) within 36 months of Company Y gaining control of Company A through Company X.
Ultimately, HKEX agreed that the proposed merger was not a backdoor listing of new business by the incoming controlling shareholder as:
The proposed merger would not result in a fundamental change to Company A’s principal business, and was in line with Company A’s strategies to expand its port terminal business; and
The proposed merger represented an internal restructuring of the port-related businesses held under Company X which controlled Company A and the target company before the proposed merger and would continue to do so after the merger. There was no injection of asset or business from Company Y.
4) Conspiracy to defraud over secret backdoor listing – (HKSAR v Chim Pui-chung & Chim Kim-lun & Wong Poe-lai [2024] HKDC 2085)
In July 2013, Chim Pui Chung and his son Ricky Chim, who were respectively the substantial shareholder and chairman of Asia Resources Holdings Limited (“Asia Resources”), and businessman Ma Zhonghong agreed to a secret backdoor listing arrangement to sell Asia Resources to Ma. It was also agreed among the trio that Ma would pay Chim Pui Chung a sum of approximately HK$210 million to control 70% to 75% of the issued share capital of Asia Resources and Ricky Chim as the chairman of Asia Resources would use his powers to procure placing of HK$535.5 million convertible notes of Asia Resources to nominees of Ma, including Wong Poe Lai.
In HKSAR v Chim Pui-chung & Chim Kim-lun & Wong Poe-lai [2024] HKDC 2085, Chim Pui-chung, Ricky Chim and Ma were jointly charged with two counts of conspiracy to defraud, contrary to common law and may be penalised under section 159C(6) of the Crimes Ordinance (Cap. 200). Ma and Wong were jointly charged with one count of dealing with property known or reasonably believed to represent proceeds of an indictable offence, contrary to section 25(1) of the Organized and Serious Crimes Ordinance (Cap. 455).
The Court held that whilst shell acquisition transactions were common in the financial market and not inherently illegal, Ricky Chim had not disclosed the real purposes for issuing convertible bonds at two board meetings he chaired in late July and early August 2013, which eventually caused the board to pass the resolution without taking into account all relevant factors. Further, Chim Pui Chung and Ricky Chim had also dishonestly concealed from HKEX the purpose of the capital-raising, causing HKEX to approve the publication of the relevant announcements and circulars, thereby depriving HKEX of its ability to properly perform its regulatory role.
On 3 February 2025, Chim Pui Chung, Ricky Chim and Wong were sentenced to imprisonment for 34 months, 37 months and 24 months, respectively. In addition, each of Chim Pui Chung and Ricky Chim was also disqualified from being a company director for 3 years.
Key Takeaways
The current Listing Rules on RTO, together with enforcement actions taken by HKEX and the Securities and Futures Commission demonstrate that the Listing Rules are not intended to unduly restrict legitimate business expansion or diversification by listed issuers, provided such activities occur over a reasonable period and are accompanied by appropriate disclosure, as well as legal compliance. With the Hong Kong capital market now showing robust momentum, listed companies should exercise caution in transactions involving significant changes to shareholdings or principal businesses to avoid inadvertently triggering the RTO provisions and breaching the disposal restrictions. Early legal and regulatory advice are recommended to navigate these requirements successfully so as to balance growth initiatives with compliance obligations.
For further guidance on navigating RTO and Listing Rules, contact Ince & Co to ensure compliance and strategic alignment with this evolving landscape.
Feel free to contact Partner Kevin Woo for more details.
email: [email protected]
03 March 2026
