上市方式 · 2025-12-23

Calculating the Thresholds for Notifiable Transactions and Connected Transactions Post-Listing

The 2025 enforcement cycle of the Stock Exchange of Hong Kong Limited (HKEX) has placed a renewed focus on the precision of percentage ratio calculations for notifiable and connected transactions, particularly following amendments to the Listing Rules effective 1 January 2024. For listed issuers and their advisers, a miscalculation of the assets, profits, revenue, consideration, or equity capital ratios under Chapter 14 and Chapter 14A can trigger a retrospective reclassification of a transaction, leading to a breach of disclosure obligations and potential disciplinary action by the Listing Division. The stakes are amplified by the increasing complexity of offshore-onshore corporate structures, where the valuation of PRC subsidiaries and the treatment of intra-group guarantees often distort the standard tests. This article dissects the mechanics of each percentage ratio—from the asset test to the consideration-to-market-cap test—using the exact regulatory language from the Rules, and examines the critical interpretive nuances that practitioners must apply when structuring deals in the current Hong Kong market.

The Five Pillars of Classification: Ratio-by-Ratio Mechanics

The classification of any transaction under Chapters 14 and 14A of the Main Board Listing Rules hinges on the calculation of five specific percentage ratios. Each ratio serves a distinct purpose in measuring the materiality of a transaction relative to the issuer’s published financial position. A transaction becomes a notifiable transaction when any of these ratios equals or exceeds 5%, 25%, 50%, or 75%, triggering corresponding disclosure and shareholder approval requirements.

The Asset Ratio (Rule 14.07(1) and 14A.22(1))

The asset ratio is calculated by dividing the total assets that are the subject of the transaction by the issuer’s total assets. The numerator must be determined based on the carrying value of the assets in the most recent published audited consolidated accounts of the issuer, as stated in Rule 14.16(1). For an acquisition of a company or a business, the “total assets” of the target are generally the book value of its net assets, but the HKEX has clarified in Listing Decision LD43-3 (2012) that if the purchase consideration exceeds the net asset value, the consideration itself becomes the numerator for the asset ratio test. This “consideration-as-assets” rule is a common trap: a HK$500 million acquisition of a company with net assets of HK$200 million means the asset ratio is calculated using HK$500 million, not HK$200 million, potentially pushing the transaction into a higher classification bracket.

The Profits Ratio (Rule 14.07(2) and 14A.22(2))

The profits ratio compares the profits attributable to the assets acquired or disposed of against the issuer’s profits. The HKEX defines “profits” as profit before taxation and minority interests and extraordinary items, as per the standard calculation in the issuer’s audited accounts. A critical nuance arises when the target has been loss-making. Rule 14.24 states that if the target’s profits are negative, the ratio is deemed to be zero—meaning the profits test cannot, by itself, classify a transaction as notifiable. However, this does not apply to connected transactions under Chapter 14A, where the HKEX may still require shareholder approval if the transaction is material in nature, even if the profits ratio is zero. Practitioners must therefore never rely solely on the profits ratio when the target is in a start-up or turnaround phase.

The Revenue Ratio (Rule 14.07(3) and 14A.22(3))

The revenue ratio divides the revenue attributable to the target by the issuer’s total revenue. This is the most straightforward of the five ratios, but it requires careful attribution when the transaction involves a partial interest or a joint venture. Under Rule 14.19, if the issuer acquires a 30% interest in a company, the revenue attributed to that interest is 30% of the target’s total revenue, not the full amount. This proportional treatment is consistent across all ratios where the issuer does not acquire or dispose of 100% of the target.

The Consideration Ratio (Rule 14.07(4) and 14A.22(4))

The consideration ratio compares the total consideration paid or received to the issuer’s total market capitalisation. This is the only ratio that uses market capitalisation rather than a balance sheet or income statement figure. The market capitalisation is calculated as the average of the issuer’s closing share price over the five trading days immediately preceding the date of the transaction agreement, as specified in Rule 14.22. For issuers with volatile stock prices, a single-day price spike can distort the ratio; the five-day average provides a smoothing mechanism. The consideration must include all forms of payment—cash, shares, deferred consideration, earn-outs, and assumption of liabilities—as defined in Rule 14.22(2).

The Equity Capital Ratio (Rule 14.07(5) and 14A.22(5))

Introduced in the 2018 amendments to the Listing Rules, the equity capital ratio applies specifically to share buy-backs and certain capital reductions. It divides the amount of equity capital cancelled or redeemed by the issuer’s net asset value as shown in its latest audited accounts. This ratio is rarely triggered in standard M&A but becomes relevant for off-market buy-backs or privatisation schemes where the consideration exceeds the statutory threshold for a whitewash waiver under the Takeovers Code.

Aggregation and Connected Transaction Complications

The most frequent source of classification errors arises not from the calculation of individual ratios, but from the aggregation rules under Rule 14.22 and 14A.28. These rules require issuers to aggregate a series of transactions that are completed within a 12-month period if they are “entered into with the same counterparty, or with parties that are otherwise connected,” or if they “involve the acquisition or disposal of assets in the same class.” The HKEX’s Guidance Letter GL12-10 (updated March 2024) provides a detailed framework: aggregation is mandatory where the transactions are part of a larger scheme or arrangement, or where they collectively achieve a commercial objective that could not be achieved individually.

Same Counterparty and Connected Persons

For connected transactions, the aggregation rules are broader. Rule 14A.28 requires aggregation of all transactions with the same connected person (or its associates) completed within the 12-month period, regardless of whether they relate to the same class of assets. This catches scenarios where a listed issuer enters into a series of small consultancy contracts with a director’s spouse’s company—each below the 0.1% de minimis threshold—but collectively exceed 5%, triggering a disclosure obligation. The 2024 amendments to Chapter 14A tightened the de minimis exemption: transactions with a connected person are now fully exempt only if each individual ratio is below 0.1% and the aggregate consideration is below HK$1 million.

The “Class of Assets” Trap

Aggregation under Rule 14.22(2) for notifiable transactions applies to acquisitions or disposals of assets “in the same class.” The HKEX has consistently interpreted “class of assets” broadly. In Listing Decision LD43-3, the Exchange considered that two separate acquisitions of residential properties in the same district within six months were of the same class—real estate—and therefore had to be aggregated. The same logic applies to acquisitions of shares in the same subsidiary, even if the shares are acquired from different vendors. Practitioners must map the entire 12-month acquisition pipeline before classifying any single transaction.

Connected Transaction Exemptions and the De Minimis Thresholds

Chapter 14A provides three levels of exemption: fully exempt (all ratios below 0.1%), partially exempt (all ratios below 5% but consideration below HK$3 million), and subject to reporting and announcement only (all ratios below 5% but consideration above HK$3 million). The 2024 amendments to Rule 14A.31 removed the previous “0.1% or HK$1 million” alternative for fully exempt transactions, replacing it with a strict “all ratios below 0.1% and consideration below HK$1 million” test. This change has eliminated the ability of issuers to rely on a low consideration figure to bypass disclosure where the asset ratio is high.

Cross-Border Structures and Valuation Nuances

The calculation of percentage ratios becomes materially more complex when the transaction involves PRC-incorporated targets or offshore holding structures. The treatment of VIE (Variable Interest Entity) arrangements, WFOE (Wholly Foreign-Owned Enterprise) valuations, and intra-group guarantees requires careful application of the HKEX’s guidance on “total assets” and “consideration.”

VIE and WFOE Structures

For a Hong Kong-listed company with a Cayman Islands holding company and a PRC operating subsidiary via a VIE structure, the “total assets” of the target in an acquisition of the VIE interests are not simply the book value of the VIE’s net assets. The HKEX’s Guidance Letter GL77-14 (December 2014, updated 2023) requires that the asset ratio be calculated based on the fair value of the VIE’s assets as determined by an independent valuer, not the historical cost. This is because the VIE’s contractual arrangements do not provide legal ownership of the underlying assets, making book value an unreliable measure. In practice, this means a HK$100 million VIE acquisition may have an asset ratio calculated on a fair value of HK$300 million, pushing it into the discloseable transaction category.

Guarantees and Indemnities

A guarantee provided by the listed issuer for the benefit of a target company is treated as part of the consideration under Rule 14.22(2). If the issuer guarantees a HK$200 million bank loan of the target as part of the acquisition consideration, that HK$200 million must be added to the cash consideration for the consideration ratio test. This is a common oversight in cross-border M&A where the vendor requires a parent company guarantee to secure vendor financing. The HKEX’s Listing Decision LD100-2020 confirmed that a guarantee is consideration even if it is not drawn down at closing.

PRC Tax and Stamp Duty Adjustments

The consideration ratio must also include any transaction costs borne by the issuer, including PRC stamp duty, land appreciation tax, and business tax on the transfer of assets. In a PRC asset acquisition, the buyer typically bears the stamp duty at 0.05% of the consideration and, in certain land transfers, the land appreciation tax at rates up to 60%. These costs, while not paid to the vendor, are part of the total consideration for the purpose of the percentage ratio calculation under Rule 14.22(2). A HK$500 million land acquisition in Shanghai may have total consideration of HK$580 million after taxes and fees, altering the classification bracket.

Practical Compliance and Disclosure Requirements

Once the percentage ratios are calculated and the transaction is classified, the issuer must comply with the specific disclosure and approval requirements under Chapter 14 and Chapter 14A. The timeline for compliance is driven by the date of the agreement, not the date of completion.

Announcement and Shareholder Circular Timelines

A discloseable transaction (any ratio between 5% and 25%) requires an announcement as soon as reasonably practicable after the terms are agreed, per Rule 14.34. A major transaction (any ratio between 25% and 75%) requires both an announcement and a shareholder circular, which must be dispatched within 15 business days of the announcement under Rule 14.40. A very substantial acquisition (any ratio above 75%) requires the same, plus the HKEX’s prior approval of the circular and an extraordinary general meeting.

Connected Transaction Approval Pathways

For a connected transaction where the highest percentage ratio is between 0.1% and 5%, the issuer must publish an announcement but does not need independent shareholder approval, provided the independent board committee confirms the terms are fair and reasonable. Where any ratio exceeds 5%, independent shareholder approval is mandatory, and the connected person must abstain from voting. The HKEX’s 2024 amendments to Rule 14A.36 now require that the independent financial adviser’s opinion be included in the announcement, not just the circular, reducing the time available for preparation.

For a very substantial acquisition or a major transaction involving a connected person, the issuer must appoint a sponsor to advise on the transaction. Rule 3A.02 requires the sponsor to conduct due diligence on the target and to confirm in the circular that the transaction is in the ordinary and usual course of business and on normal commercial terms. The sponsor’s liability extends to the accuracy of the percentage ratio calculations, and the HKEX has, in 2025 enforcement actions, held sponsors liable for errors in the asset ratio calculation where the consideration-as-assets rule was misapplied.

Actionable Takeaways

Calculate the asset ratio using the higher of the target’s net asset value or the total consideration, as confirmed by Listing Decision LD43-3 (2012), to avoid under-classifying an acquisition.
Aggregate all transactions with the same counterparty or in the same class of assets completed within the preceding 12 months before determining the classification of any new transaction.
Include all guarantees, indemnities, and transaction taxes in the consideration figure for the consideration ratio test, as required by Rule 14.22(2) and LD100-2020.
For VIE or PRC-incorporated targets, use the independent fair value of the assets rather than historical book value for the asset ratio test under GL77-14.
Engage a sponsor at the earliest stage of a major or connected transaction to ensure the percentage ratio calculations are audit-ready and compliant with the 2024 amendments to Chapter 14A.