Quiet Period Rules Before Hong Kong IPO Listing: What Companies Cannot Say

The SFC and HKEX’s joint consultation on 19 June 2025 proposed codifying the common-law “quiet period” for IPO applicants, a move that would transform a previously ambiguous convention into a binding regulatory obligation under the Listing Rules. This consultation, which closed on 18 September 2025, targets the period between the filing of an A1 application and the first day of dealings on the Main Board or GEM. The proposed amendments, detailed in the Joint Consultation Paper on Listing-Related Communications and Market Sounding Practices (the “Consultation Paper”), aim to eliminate selective disclosure and market manipulation risks that have historically plagued the pre-deal phase. For companies, sponsors, and their legal counsel, the stakes are high: a breach during this window can delay the listing timetable, trigger SFC enforcement action under the Securities and Futures Ordinance (Cap. 571), or expose the issuer to civil liability under the Misrepresentation Ordinance (Cap. 284). Understanding exactly what constitutes a prohibited communication—and what does not—has become a critical compliance exercise for any entity preparing for a Hong Kong IPO.

The Regulatory Framework: From Common Law to Codified Rules

The quiet period, as currently understood, derives from common law principles of market integrity and the overarching requirement for all investors to have equal access to material information. The HKEX’s Listing Decision LD43-3 (2003) established the foundational principle that an issuer must not selectively disclose material information to any party during the listing process. However, until the 2025 consultation, no specific Listing Rule defined the quiet period’s start and end dates or enumerated the types of communications that are prohibited.

The proposed amendments, if adopted, would insert a new Rule 9A.01 into the Main Board Listing Rules and a corresponding Rule 14A.01 into the GEM Rules. These rules would explicitly prohibit an issuer, its directors, sponsors, and financial advisers from engaging in any communication that could reasonably be perceived as promoting the IPO, soliciting orders, or selectively disseminating material information during the quiet period. The period would commence on the date the A1 application is submitted to HKEX and conclude at the earlier of: (a) the first day of dealings on the Exchange, or (b) the date the application is formally withdrawn or rejected.

The SFC’s Code of Conduct for Persons Licensed by or Registered with the Securities and Futures Commission (the “Code of Conduct”) provides additional guidance. Paragraph 5.2 of the Code of Conduct requires licensed persons to ensure that all communications with the public are fair, balanced, and not misleading. During the quiet period, this standard is applied with heightened scrutiny. The SFC’s Guidance Note on Pre-Deal Research (2014) further clarifies that any distribution of research reports or analyst briefings that could be construed as conditioning the market for the IPO is prohibited.

Key Distinctions: What Is and Is Not Prohibited

The proposed rules make a critical distinction between “permitted communications” and “prohibited communications.” Permitted communications include routine administrative interactions with HKEX, responses to specific enquiries from the Exchange, and communications with professional advisers that are necessary for the preparation of the prospectus. Prohibited communications encompass any public statement, media interview, investor presentation, or social media post that discusses the issuer’s financial performance, business outlook, or the details of the proposed listing.

The SFC’s Enforcement Bulletin No. 16 (2022) highlighted a case where an issuer’s CEO gave an interview to a financial newspaper during the quiet period, discussing the company’s projected revenue growth for the next three years. The SFC found that this constituted selective disclosure of material information, as the projections were not included in the prospectus and were not available to all potential investors. The issuer was required to publish a clarifying announcement and delay its listing by two weeks.

Specific Restrictions: What Companies Cannot Say

The quiet period imposes a comprehensive ban on any communication that could be interpreted as “conditioning the market” for the IPO. This prohibition extends beyond direct statements about the offering to include any commentary that could reasonably influence investor sentiment regarding the issuer’s value or prospects.

Financial Projections and Forward-Looking Statements

An issuer must not disclose any financial projections, forecasts, or forward-looking statements during the quiet period that are not already contained in the prospectus. This includes revenue guidance, profit estimates, EBITDA targets, or any other quantitative or qualitative assessment of future financial performance. The HKEX’s Guidance Letter GL41-12 (2012, updated 2023) states that any forward-looking information disclosed outside the prospectus must be consistent with the information in the prospectus and must not be selective.

A practical example: if an issuer’s prospectus includes a statement that “the company expects to achieve revenue growth of 15-20% in the next financial year,” the issuer cannot, during the quiet period, provide a more specific range (e.g., “18-19%”) or a more optimistic outlook (e.g., “25%”) in any external communication. Doing so would constitute a breach of Listing Rule 9A.01 and could be treated as a material misstatement under the prospectus regime.

Media Interviews and Press Releases

All media interactions are effectively frozen during the quiet period. An issuer cannot grant interviews to financial newspapers, business magazines, television stations, or online news portals. The SFC’s Guidance Note on Media Communications During the Listing Process (2019) specifies that even “off-the-record” briefings are prohibited, as the journalist may still publish the information, creating a risk of selective disclosure.

Press releases are similarly restricted. An issuer may only publish press releases that are required by law or regulation (e.g., announcements under the Takeovers Code or the Companies Ordinance) or that relate to routine operational matters that are not material to the IPO. For example, a press release announcing the opening of a new retail store in a major city would generally be permitted, provided it does not discuss the store’s expected contribution to revenue or profit. However, a press release announcing a major new contract with a Fortune 500 company would likely be prohibited, as it could materially affect the issuer’s valuation and would not be available to all investors.

Social Media and Digital Communications

The quiet period applies equally to digital channels. Issuers must suspend all social media activity on platforms such as LinkedIn, Twitter (now X), WeChat, and corporate blogs that could be construed as promoting the IPO or selectively disclosing material information. The SFC’s Enforcement Bulletin No. 21 (2024) featured a case where an issuer’s marketing director posted a series of LinkedIn articles during the quiet period, highlighting the company’s “record-breaking revenue” and “industry-leading margins.” The SFC determined that these posts constituted selective disclosure, as the financial data was not in the prospectus and was not available to all investors. The issuer was fined HKD 1.5 million and required to postpone its listing by three months.

Internal communications are not exempt. Directors, senior management, and employees must be instructed not to discuss the IPO or the company’s financial performance on personal social media accounts, in private messaging groups, or in any forum where the information could leak to the public.

Permitted Activities and Safe Harbours

The quiet period is not a complete blackout on all communications. Certain categories of activity are explicitly permitted, provided they are conducted in a controlled and non-selective manner.

Responses to HKEX Enquiries

An issuer may respond to specific enquiries from HKEX regarding the listing application. These responses are typically submitted through the HKEX’s electronic filing system (e-IPO) and are treated as confidential communications with the regulator. The issuer’s sponsor must review all such responses to ensure they do not contain material information that has not been disclosed in the prospectus or that could be construed as promotional.

Communications with Professional Advisers

Communications with the sponsor, legal counsel, auditors, reporting accountants, and other professional advisers that are necessary for the preparation of the prospectus or the conduct of due diligence are permitted. However, these communications must be strictly confidential and must not be shared with any third party, including potential investors or analysts.

Routine Operational Announcements

An issuer may continue to make routine operational announcements that are required by law, regulation, or the issuer’s constitutional documents. For example, a company listed on the Main Board that is also applying for a new listing may need to publish its annual results or interim results under Listing Rule 13.49. Such announcements are permitted, provided they do not contain any information that is inconsistent with the prospectus or that could be construed as promoting the IPO.

The HKEX’s Guidance Letter GL86-16 (2016, updated 2024) provides a safe harbour for issuers that need to publish financial results during the quiet period. The guidance states that the issuer should include a disclaimer in the announcement stating that the results have been prepared in accordance with the applicable accounting standards and that the prospectus will contain additional information. The issuer must not use the results announcement to discuss the IPO timetable, the use of proceeds, or any other matter related to the listing.

Market Sounding and Pre-Deal Research

Market sounding activities are subject to a separate but overlapping set of rules. The SFC’s Code of Conduct requires that any market sounding conducted by a sponsor or underwriter must be done on a confidential basis, with a “need to know” rationale, and must not involve the selective disclosure of material information. The proposed amendments to the Listing Rules would explicitly prohibit any market sounding that is designed to condition the market for the IPO or to solicit orders from potential investors.

The SFC’s Guidance Note on Pre-Deal Research (2014) prohibits the distribution of research reports on an issuer during the quiet period, unless the research is based solely on publicly available information and does not contain any material non-public information about the IPO. In practice, most sponsors prohibit all research distribution during the quiet period to avoid any risk of breach.

Consequences of Breach and Enforcement Trends

The consequences of breaching the quiet period can be severe, ranging from administrative sanctions to criminal prosecution.

HKEX Enforcement

HKEX may impose a range of sanctions for breaches of the quiet period rules, including: (a) requiring the issuer to publish a clarifying announcement; (b) delaying the listing timetable; (c) imposing a fine of up to HKD 10 million under Listing Rule 2A.10; (d) publicly censuring the issuer or its directors; or (e) in extreme cases, rejecting the listing application altogether. The HKEX’s Enforcement Report 2024 noted that the Exchange had taken action against three issuers in 2024 for quiet period breaches, resulting in an average delay of 45 days to the listing timetable.

SFC Enforcement

The SFC has broader enforcement powers under the Securities and Futures Ordinance (Cap. 571). Section 277 of the SFO makes it a criminal offence to make a false or misleading statement in connection with a listing application, punishable by a fine of up to HKD 1 million and imprisonment for up to 10 years. Section 300 of the SFO prohibits market misconduct, including the selective disclosure of material information, which carries a maximum penalty of a fine of HKD 10 million and imprisonment for 10 years.

The SFC’s Enforcement Bulletin No. 21 (2024) highlighted a trend of increased scrutiny of digital communications during the quiet period. The SFC has deployed data analytics tools to monitor social media posts, corporate blogs, and online forums for potential breaches. In 2024, the SFC initiated 12 investigations into quiet period breaches, up from 8 in 2023.

Civil Liability

Issuers and their directors may also face civil liability under the Misrepresentation Ordinance (Cap. 284) or common law tort of deceit. If an investor can demonstrate that they relied on a selective disclosure made during the quiet period to make an investment decision, they may be able to claim damages for any resulting loss. The prospectus liability regime under the Companies Ordinance (Cap. 622) also applies, as any material information disclosed outside the prospectus could be treated as a misrepresentation if it is inconsistent with the prospectus or if it creates a misleading overall impression.

Practical Compliance Steps for Issuers and Sponsors

Given the complexity of the quiet period rules, issuers and sponsors should implement a structured compliance program to mitigate the risk of inadvertent breaches.

Pre-Filing Preparation

Before filing the A1 application, the issuer should: (a) appoint a compliance officer responsible for overseeing all communications during the quiet period; (b) issue a written policy to all directors, senior management, and employees, clearly defining what communications are prohibited; (c) review all existing social media accounts, corporate websites, and marketing materials to ensure they do not contain any statements that could be construed as promoting the IPO; and (d) train all relevant personnel on the quiet period rules, using case studies and hypothetical scenarios.

During the Quiet Period

The compliance officer should: (a) monitor all external communications, including press releases, media interviews, social media posts, and investor presentations; (b) maintain a log of all permitted communications, including responses to HKEX enquiries and routine operational announcements; (c) conduct regular spot checks of social media accounts to ensure no unauthorised posts have been made; and (d) report any potential breaches to the sponsor and legal counsel immediately.

Post-Listing Transition

The quiet period ends on the first day of dealings, but the issuer must immediately transition to the ongoing disclosure regime under the Listing Rules. The issuer should: (a) publish a post-listing announcement confirming the date of listing and the total number of shares issued; (b) update its corporate website to reflect its new status as a listed company; and (c) implement a new communications policy that complies with the continuing disclosure obligations under Listing Rule 13.09.

Actionable Takeaways

1. The quiet period commences on the date of A1 filing and ends at the earlier of the first day of dealings or application withdrawal, with any breach risking a minimum 45-day listing delay based on 2024 HKEX enforcement data.
2. All financial projections, forward-looking statements, and media interviews are prohibited during the quiet period, with the SFC having initiated 12 investigations into digital communication breaches in 2024 alone.
3. Routine operational announcements required by law or regulation are permitted, but must include a disclaimer stating that the prospectus will contain additional information, per HKEX Guidance Letter GL86-16.
4. Market sounding activities are subject to overlapping restrictions under the SFC’s Code of Conduct and the proposed Listing Rule 9A.01, with any conditioning of the market prohibited.
5. Issuers must appoint a compliance officer and implement a written communications policy before filing the A1 application, as the SFC’s Enforcement Bulletin No. 21 confirmed that digital communications are now a primary enforcement focus.