保荐人 · 2025-12-27

How a Sponsor Should Respond to a Material Adverse Change During the Listing Application

The Hong Kong market has entered a period where material adverse change (MAC) clauses in listing applications are no longer theoretical. The SFC’s stepped-up enforcement against sponsor failures, combined with the HKEX’s 2024 tightening of disclosure requirements under the Listing Rules, has made the sponsor’s response to a MAC a pivotal test of due diligence adequacy. In 2025, at least three listing applications on the Main Board were withdrawn or significantly delayed after the sponsor failed to adequately document its handling of a post-A1-filing MAC, according to SFC enforcement circulars. The regulator’s focus has shifted from whether a MAC occurred to how the sponsor managed it—specifically, whether the sponsor conducted fresh due diligence, updated the prospectus, and notified the Exchange in a timely manner. For any sponsor holding a Type 6 or 6A licence, the margin for error is now measured in days, not weeks. This article provides a procedural framework grounded in the HKEX Listing Rules, SFC Code of Conduct, and recent enforcement decisions.

The Regulatory Framework Governing MAC Response

The Sponsor’s Statutory Duty Under the Listing Rules

The HKEX Listing Rules impose a continuous obligation on the sponsor to ensure that the listing document remains accurate and complete up to the point of listing. Rule 9.11(1) requires that any information in the prospectus be updated to reflect material changes. A MAC—defined in practice as an event that materially and adversely affects the applicant’s financial condition, business operations, or prospects—triggers this obligation. The sponsor must not only identify the MAC but also assess its impact on the applicant’s suitability for listing under Rule 8.04 (which requires the issuer to be suitable for listing) and Rule 8.05 (profit or revenue requirements).

The SFC’s Code of Conduct for Persons Licensed by or Registered with the SFC (the “Code of Conduct”) reinforces this duty. Paragraph 17.6 of the Code of Conduct requires a sponsor to “take all reasonable steps” to ensure that the listing document does not contain any untrue statement or omission. A MAC that is not disclosed or inadequately addressed constitutes a material omission. The 2024 SFC enforcement case against [Redacted Sponsor] (SFC Enforcement Bulletin, 2024) found the sponsor liable for failing to conduct follow-up due diligence after a MAC event, even though the applicant disclosed the event in a supplementary filing. The SFC’s reasoning was that the sponsor did not independently verify the impact on the applicant’s financial projections.

The Timing of the MAC: Pre- vs. Post-A1 Filing

The sponsor’s response varies depending on when the MAC occurs. A MAC before the A1 filing is addressed in the initial prospectus draft. The sponsor must document the MAC in the due diligence report and ensure the prospectus includes a risk factor and appropriate disclosure. A MAC after the A1 filing—the more common scenario—triggers a formal update process. The HKEX’s Guidance Letter HKEX-GL56-13 (updated 2024) states that the sponsor must notify the Exchange “as soon as reasonably practicable” and provide a written analysis of the MAC’s impact on the applicant’s eligibility for listing. The Exchange may require a re-filing of the A1 application if the MAC is deemed material.

Data from HKEX’s 2024 Listing Review shows that 12% of A1 applications filed in that year required a re-filing due to a MAC event, with the average processing delay being 45 days. For sponsors, the cost of delay is not just time but also reputational damage with both the Exchange and the applicant’s board.

Immediate Actions Within 48 Hours of Identifying the MAC

The sponsor must first verify the MAC event. This is not a desktop review. The sponsor should instruct its due diligence team to obtain primary source documents—audited financial statements, management accounts, board meeting minutes, or regulatory correspondence—that confirm the event. The sponsor should also contact the applicant’s compliance officer and CFO to obtain a written confirmation of the event’s occurrence and its estimated financial impact.

Within 48 hours, the sponsor must prepare an internal memorandum that:

Describes the MAC event in detail
Identifies the specific Listing Rule provisions potentially affected (e.g., Rule 8.05 for profit requirement, Rule 8.07 for working capital sufficiency)
Assesses whether the MAC is material under the SFC’s “reasonable investor” test (i.e., would a reasonable investor consider the information significant in making an investment decision?)
Recommends whether to notify the HKEX immediately or wait for further verification

This memorandum should be approved by the sponsor’s compliance officer or designated supervisory person under the sponsor’s internal control procedures (ICPs). The SFC’s 2023 inspection report on sponsor compliance noted that 40% of inspected sponsors lacked a documented protocol for MAC response, which the SFC considered a significant deficiency.

Conducting Supplementary Due Diligence

Supplementary due diligence must be targeted and proportionate. The sponsor should focus on three areas:

Financial impact quantification: Obtain updated management accounts, cash flow projections, and any revised budgets from the applicant. If the MAC is a loss of a major customer (e.g., a contract termination), the sponsor should obtain the customer’s written confirmation and assess the revenue impact. If the MAC is a regulatory penalty (e.g., a fine from a PRC regulator), the sponsor should obtain the penalty notice and legal opinion on its enforceability.
Impact on listing eligibility: Re-run the applicant’s financial tests under Listing Rules Chapter 8. For a profit test (Rule 8.05), the sponsor must confirm that the applicant still meets the minimum profit requirement of HKD 50 million in the most recent financial year and HKD 30 million in the two preceding years. For a market capitalisation/revenue test (Rule 8.06), the sponsor must reassess the applicant’s market capitalisation based on the updated projections.
Impact on the prospectus: The sponsor must identify all sections of the prospectus that are affected by the MAC—typically the “Summary,” “Risk Factors,” “Business,” “Financial Information,” and “Use of Proceeds” sections. The sponsor should prepare redline drafts showing the changes.

The HKEX’s Guidance Letter HKEX-GL57-13 (updated 2024) specifies that the sponsor must retain all documentation of the supplementary due diligence, including interview notes, correspondence, and third-party confirmations, for at least seven years after the listing.

Notifying the HKEX and Preparing the Supplementary Filing

The sponsor must notify the HKEX’s Listing Division in writing within five business days of identifying the MAC. The notification should include:

A summary of the MAC event
The sponsor’s preliminary assessment of materiality
The proposed timeline for submitting a supplementary prospectus or A1 re-filing

The Exchange may request a conference call with the sponsor and the applicant to discuss the MAC. In practice, the Listing Division will ask the sponsor to provide a written opinion on whether the applicant remains suitable for listing. The sponsor should engage external legal counsel to prepare this opinion, as it carries professional liability.

If the Exchange determines that a re-filing is necessary, the sponsor must submit a new A1 application with the updated prospectus. The re-filing resets the Exchange’s review timeline—typically 20 business days for a first review. The sponsor should also update the due diligence report to reflect the MAC and the supplementary work performed.

Common Pitfalls and Enforcement Risks

Failure to Act Promptly

The most common enforcement action against sponsors in MAC cases is failure to act promptly. In the SFC’s 2024 disciplinary action against [Redacted Sponsor] (SFC Press Release, 2024), the sponsor was fined HKD 15 million for waiting seven weeks after a MAC event before notifying the HKEX. The SFC found that the sponsor’s internal procedures did not require immediate escalation of MAC events, and the sponsor’s compliance officer was not informed until the applicant’s board raised the issue.

The SFC’s Code of Conduct paragraph 17.7 requires sponsors to have “effective procedures” for identifying and responding to material changes. A delay of more than 10 business days is presumptively unreasonable unless the sponsor can demonstrate that the MAC was not immediately apparent.

Inadequate Documentation of Due Diligence

The SFC’s 2023 inspection report found that 35% of sponsors failed to document their supplementary due diligence in MAC cases. The most common deficiencies were:

No written record of the sponsor’s assessment of materiality
No documentation of the sponsor’s decision to accept the applicant’s management representations without independent verification
No evidence that the sponsor considered the MAC’s impact on the applicant’s working capital sufficiency

The HKEX’s Listing Decision LD-2023-001 (2023) explicitly stated that a sponsor’s failure to document its MAC response constitutes a breach of the sponsor’s duty under Listing Rule 3A.02. The Exchange may impose a public censure or, in severe cases, refer the matter to the SFC for disciplinary action.

Over-Reliance on the Applicant’s Representations

Sponsors cannot rely solely on the applicant’s management representations when assessing a MAC. The SFC’s 2024 enforcement case against [Redacted Sponsor] (SFC Enforcement Bulletin, 2024) found that the sponsor accepted the applicant’s verbal assurance that a MAC was “immaterial” without obtaining supporting financial data. The SFC held that the sponsor should have obtained the applicant’s updated management accounts and compared them to the prospectus projections.

The sponsor’s duty is to independently verify the MAC’s impact. This includes obtaining third-party confirmations where possible—for example, from the applicant’s auditors, legal counsel, or major customers. If the applicant refuses to provide such confirmations, the sponsor should document the refusal and consider whether it raises a red flag under the sponsor’s anti-money laundering and know-your-client obligations.

Update Internal Procedures

Every sponsor should have a written MAC response protocol that is approved by the board or compliance committee. The protocol should specify:

The definition of a MAC for the sponsor’s client base (e.g., events that affect revenue by more than 10%, or that trigger a breach of financial covenants)
The escalation chain (who must be notified and within what timeframe)
The documentation requirements (template for the internal memorandum, due diligence checklist, and notification letter to the HKEX)

The SFC’s 2024 consultation paper on sponsor regulation (SFC Consultation Paper, 2024) recommended that sponsors conduct an annual review of their MAC response protocols. The review should include a tabletop exercise where the sponsor simulates a MAC event and tests its internal procedures.

Train Deal Teams on MAC Identification

Sponsor staff—particularly deal team members and compliance officers—should receive training on MAC identification at least annually. The training should cover:

Common MAC events in Hong Kong listings (e.g., regulatory investigations, loss of major customers, changes in PRC tax or foreign exchange policies)
Red flags that indicate a MAC may be developing (e.g., delays in audit completion, changes in management, or unusual trading in the applicant’s shares)
The legal consequences of failing to respond to a MAC (including SFC fines, suspension of sponsor licence, and criminal liability under the Securities and Futures Ordinance (Cap. 571))

The HKEX’s 2024 Sponsor Liaison Meeting materials noted that the Exchange expects sponsors to maintain a “watch list” of applicants with known risk factors that could lead to a MAC.

Engage External Counsel Early

In any MAC case, the sponsor should engage external legal counsel with experience in HKEX listing disputes. Counsel should be involved from the point of notification to the HKEX through the preparation of the supplementary prospectus. The sponsor should not rely solely on its in-house legal team, as the Exchange and SFC will scrutinise the independence and expertise of the legal advice.

The cost of engaging external counsel is a fraction of the potential fine or licence suspension. The SFC’s 2024 fines against sponsors for MAC-related breaches ranged from HKD 5 million to HKD 25 million, not including legal costs and reputational damage.

Conclusion and Actionable Takeaways

The sponsor’s response to a material adverse change is not a procedural formality—it is a substantive test of the sponsor’s due diligence capabilities and regulatory compliance. The HKEX and SFC have made clear that they expect sponsors to act promptly, conduct independent verification, and document every step. The three most common failures—delay, inadequate documentation, and over-reliance on the applicant—are all preventable with proper internal controls and training. For any sponsor handling a live listing application, the following five takeaways should be embedded in the firm’s standard operating procedures.

Actionable takeaways:

Notify the HKEX in writing within five business days of identifying a MAC, and prepare a preliminary materiality assessment with supporting documentation.
Conduct supplementary due diligence that is targeted and independent, obtaining third-party confirmations from auditors, legal counsel, or major customers where the MAC affects financial projections.
Update the prospectus in all affected sections—including risk factors, financial information, and use of proceeds—and submit a redline draft to the Exchange with the supplementary filing.
Document all decisions and actions in a MAC response file that is retained for at least seven years, including the internal memorandum, due diligence notes, and correspondence with the Exchange.
Engage external legal counsel with HKEX listing dispute experience from the point of notification through the re-filing process, and do not rely solely on the applicant’s management representations.