IPO Application Document Checklist: Every File You Need to Submit to HKEX

The HKEX published its 2025 annual review of listing applications in February 2026, revealing that the average time from initial submission to the first formal comment letter from the Listing Division had compressed to 14 business days, down from 21 business days in 2024. This acceleration reflects the Exchange’s continued push under the Listing Reform Package 2024 to streamline the A1 filing process, but it places a correspondingly heavier burden on applicants to submit a complete, technically compliant document set on day one. Any missing or defective document in the initial A1 submission now triggers a Section 5.1A(2) deficiency letter under the Listing Rules, which can add a minimum 10-business-day reset to the review clock. For CFOs and company secretaries managing a Main Board or GEM listing, the margin for error is effectively zero. The following checklist covers every mandatory and strongly recommended document required under Chapter 9 of the Main Board Listing Rules and Chapter 7 of the GEM Rules, as amended through 31 December 2025.

The Core A1 Submission Package: Seven Non-Negotiable Documents

The A1 application form itself (Form A1 under Main Board Rule 9.10 or GEM Rule 7.10) must be signed by every director and the proposed company secretary, with original wet-ink signatures or electronic signatures compliant with the Electronic Transactions Ordinance (Cap. 553). The HKEX Listing Division confirmed in its 2025 Guidance Letter GL85-25 that scanned or photocopied signatures will be rejected without exception, requiring a fresh submission and a new filing fee of HKD 1,500 per rejection. The form must include the exact proposed stock code prefix (e.g., 01 for Main Board, 08 for GEM) and a declaration that no director has been disqualified under Section 214 of the Securities and Futures Ordinance (Cap. 571).

The draft prospectus, filed under Main Board Rule 9.11(1) or GEM Rule 7.11(1), must be a complete version—not a partial draft—including the front cover, summary, risk factors, industry overview, financials, use of proceeds, director profiles, and statutory and general information sections. The HKEX’s 2025 thematic review of prospectus quality found that 38% of initial A1 submissions in 2025 were returned for having incomplete risk factor disclosures, specifically the absence of PRC-specific regulatory risks under the 2023 PRC Securities Law amendments. The draft must be paginated continuously, with a table of contents referencing every exhibit and schedule.

The sponsor’s declaration under Main Board Rule 3A.03 must be executed by the sponsor’s Responsible Officer (RO) and include a certification that the sponsor has conducted reasonable due diligence in accordance with the SFC’s Code of Conduct for Persons Licensed by or Registered with the SFC (Chapter 17, paragraphs 17.1 to 17.6). The declaration must attach the sponsor’s due diligence plan, which must identify at least three independent verification sources for each material fact in the prospectus. The HKEX’s 2025 enforcement report cited two cases where sponsors failed to include the due diligence plan in the A1 package, resulting in a 30-day suspension of the application clock.

The company’s memorandum and articles of association, certified by the company secretary of the legal entity (whether incorporated in Hong Kong, Cayman Islands, Bermuda, or the PRC), must be filed in both English and Chinese. The HKEX Listing Division’s 2025 practice note PN-25/2025 clarified that articles of association for Cayman-incorporated issuers must include a specific provision authorising the company to hold board meetings by electronic means under Section 83 of the Cayman Islands Companies Act (2024 revision). Failure to include this provision has caused four A1 rejections in the first quarter of 2026 alone.

The directors’ and supervisors’ biographical forms (Form B1 under Main Board Rule 9.13(1)) must be completed for each individual, including proposed independent non-executive directors. The form requires disclosure of any past or pending disciplinary actions by the SFC, HKMA, or any recognised stock exchange globally. The HKEX’s 2025 data shows that 22% of biographical forms submitted in the year contained omissions regarding directorships in private companies that were subsequently discovered during the vetting process, leading to a mandatory 14-day extension of the review period.

The listing fee payment confirmation, referenced in Main Board Rule 9.08, must show the initial application fee of HKD 1,500 (Main Board) or HKD 1,000 (GEM) paid via the HKEX’s electronic payment gateway. The confirmation must include the transaction reference number and the exact applicant name as registered with the Companies Registry. The HKEX will not accept bank transfer receipts or cheques; only the system-generated payment confirmation is valid.

The legal opinion on the issuer’s valid incorporation and good standing must be issued by a Hong Kong-qualified solicitor if the issuer is incorporated in Hong Kong, or by a recognised law firm in the jurisdiction of incorporation (Cayman, Bermuda, BVI, or PRC) with a Hong Kong legal opinion confirming enforceability under Hong Kong law. The HKEX’s 2025 guidance note GL86-25 requires that the legal opinion must be dated within 30 days of the A1 submission date, and any opinion older than 30 days will be rejected as stale.

Financial and Diligence Documents: The Vetting Backbone

The accountants’ report under Main Board Rule 4.04 or GEM Rule 7.04 must cover the three most recent completed financial years (or two years for GEM), prepared in accordance with Hong Kong Financial Reporting Standards (HKFRS) or International Financial Reporting Standards (IFRS) as endorsed by the HKICPA. The report must be signed by the reporting accountant, who must be a practising member of the HKICPA or a recognised overseas accounting body with a practising certificate in Hong Kong. The HKEX’s 2025 review of accountants’ reports found that 15% of submissions contained errors in the revenue recognition cut-off tests, specifically for companies with significant PRC government contracts where revenue was recognised upon delivery rather than acceptance, contrary to HKFRS 15. The report must include a statement of compliance with HKFRS and a reconciliation to the PRC GAAP if the issuer’s statutory financial statements are prepared under PRC GAAP.

The pro forma financial information under Main Board Rule 4.29 must be prepared for any material acquisition or disposal completed since the last audited financial year-end. The pro forma adjustments must be stated in a columnar format, showing the historical results, the pro forma adjustments, and the adjusted pro forma results. The HKEX’s 2025 guidance letter GL87-25 specifically requires that pro forma adjustments be supported by a separate accountant’s comfort letter, which must be included in the A1 package. This comfort letter was missing in 12% of applications reviewed in 2025, causing a mandatory deficiency letter.

The profit forecast memorandum, if included in the prospectus, must be filed under Main Board Rule 11.17 and must be supported by a report from the sponsor and the reporting accountant. The memorandum must detail the key assumptions underlying the forecast, including revenue growth rates, gross margin percentages, and operating expense ratios. The HKEX’s 2025 enforcement action against Sponsor A (case reference SFC 2025/12) found that the sponsor failed to disclose a 5% downside sensitivity analysis in the profit forecast memorandum, resulting in a fine of HKD 5 million and a suspension of the sponsor’s licence for six months. The memorandum must include a sensitivity analysis showing the impact of a 10% deviation in each key assumption on the forecast profit.

The working capital sufficiency memorandum under Main Board Rule 11.13 must demonstrate that the group has sufficient working capital for at least 12 months from the date of the prospectus. The memorandum must include a detailed cash flow forecast by month, showing projected receipts, payments, and net cash positions. The HKEX’s 2025 data shows that 28% of working capital memoranda were returned for failing to include a scenario analysis for a 20% decline in revenue, which the Exchange now considers a minimum stress test for all applicants. The memorandum must be signed by both the sponsor and the reporting accountant.

The valuation report for any property interests held by the group must be prepared by an independent valuer who is a member of the Hong Kong Institute of Surveyors or the Royal Institution of Chartered Surveyors. The valuation must be dated within three months of the A1 submission date. The HKEX’s 2025 guidance note GL88-25 requires that the valuation report include a breakdown of the valuation methodology (comparable sales, income capitalisation, or replacement cost) and a sensitivity analysis showing the impact of a 10% change in the assumed capitalisation rate on the property value. For PRC property interests, the valuation must also comply with the PRC Real Estate Valuation Standards (GB/T 50291-2015) as amended in 2024.

The intellectual property report, if the group holds material IP assets such as patents, trademarks, or copyrights, must be prepared by a recognised IP valuation firm. The HKEX’s 2025 thematic review of IP-heavy listings (biotech, technology, and consumer brands) found that 45% of IP reports failed to include a market-based valuation approach, relying solely on the cost approach. The Exchange now requires that the IP report include at least two valuation approaches (cost and market, or cost and income) and a reconciliation of the differences between the approaches.

Corporate Governance and Regulatory Compliance Documents

The corporate governance report under Main Board Rule 3.09 must describe the issuer’s compliance with the Corporate Governance Code (Appendix C1 to the Main Board Rules) as effective from 1 January 2025. The report must specifically address the new Code Provision C.1.8, which requires the board to have at least one director with professional qualifications in accounting or finance, and the new Code Provision C.2.3, which requires a separate nomination committee composed entirely of independent non-executive directors. The HKEX’s 2025 enforcement data shows that 18% of A1 submissions failed to include a statement of compliance with Code Provision C.2.3, resulting in a mandatory 14-day extension.

The connected transaction agreement summaries under Main Board Rule 14A.35 must be filed for all existing and proposed connected transactions. Each summary must include the transaction type (continuing or one-off), the connected party’s name and relationship to the issuer, the transaction value, and the pricing methodology. The HKEX’s 2025 guidance letter GL89-25 requires that the summaries include a certification from the sponsor that the transactions are on normal commercial terms and that the connected party has no direct or indirect interest in the issuer’s listing. The summaries must be cross-referenced to the relevant sections of the prospectus.

The pre-IPO share option scheme documentation under Main Board Rule 17.02 must include the scheme rules, the list of grantees, the exercise prices, and the vesting schedules. The HKEX’s 2025 review of pre-IPO schemes found that 25% of submissions failed to include a valuation report for the options granted within the 12 months preceding the A1 submission. The Exchange now requires that options granted within 12 months of the A1 submission be valued using the Black-Scholes or binomial model, with the valuation report included in the A1 package.

The directors’ service contracts under Main Board Rule 13.68 must be filed for each executive director and the proposed company secretary. The contracts must include the term, remuneration, termination provisions, and any change-of-control clauses. The HKEX’s 2025 practice note PN-26/2025 clarified that service contracts with a notice period exceeding 12 months must be approved by shareholders in a general meeting before the A1 submission, and the resolution must be included in the A1 package. Failure to include the shareholder resolution has caused three A1 rejections in 2025.

The compliance manual for the SFC’s Code of Conduct and the HKEX’s Listing Rules must be filed under Main Board Rule 3.10. The manual must detail the issuer’s internal controls for financial reporting, disclosure of inside information under Part XIVA of the SFO, and compliance with the Model Code for Securities Transactions by Directors (Appendix B3). The HKEX’s 2025 thematic review found that 32% of compliance manuals were generic templates that did not address the issuer’s specific business risks, such as foreign exchange controls for PRC-based issuers or data privacy compliance for technology companies. The manual must be tailored to the issuer’s industry and operations.

Ancillary Documents and Filing Mechanics

The sponsor’s engagement letter under Main Board Rule 3A.02 must be filed to confirm the sponsor’s appointment and the scope of its work. The letter must include the sponsor’s fee structure, the termination provisions, and a statement that the sponsor has no conflict of interest with the issuer. The HKEX’s 2025 guidance note GL90-25 requires that the engagement letter be signed by the issuer’s board of directors and the sponsor’s board of directors, not merely by the sponsor’s RO.

The legal opinion on the validity of the shares to be listed must be issued by a Hong Kong-qualified solicitor and must confirm that the shares are validly issued, fully paid, and free from any encumbrances. The opinion must also confirm that the shares are eligible for listing on the Main Board or GEM under the relevant Listing Rules. The HKEX’s 2025 enforcement case against Solicitor B (case reference SFC 2025/18) found that the solicitor failed to verify the share register of a Cayman-incorporated issuer, resulting in a fine of HKD 200,000 and a suspension of the solicitor’s practice certificate for three months.

The directors’ and officers’ liability insurance policy must be filed under Main Board Rule 3.11. The policy must cover all directors and officers of the issuer and its subsidiaries for at least the first 12 months after listing. The HKEX’s 2025 guidance letter GL91-25 requires that the policy include coverage for claims arising under the SFO, the Listing Rules, and the Companies Ordinance (Cap. 622). The policy must be certified by the issuer’s company secretary as being in full force and effect.

The share registrar’s appointment letter under Main Board Rule 13.46 must be filed to confirm the appointment of a Hong Kong share registrar registered under the Companies Ordinance. The letter must include the registrar’s fee structure and a confirmation that the registrar will maintain the share register in Hong Kong. The HKEX’s 2025 practice note PN-27/2025 requires that the share registrar be appointed at least 30 days before the A1 submission date, and the appointment letter must be included in the A1 package.

Actionable Takeaways for CFOs and Company Secretaries

• Compile the A1 package using the HKEX’s electronic filing system (EFS) at least five business days before the intended submission date to allow for system validation and rejection of any non-compliant files.
• Verify that every signature on Form A1, the sponsor’s declaration, and the directors’ biographical forms is an original wet-ink or compliant electronic signature under Cap. 553, and reject any photocopied or scanned signatures.
• Ensure the accountants’ report includes a full reconciliation to PRC GAAP if the issuer’s statutory accounts are prepared under PRC GAAP, and confirm that revenue recognition complies with HKFRS 15 for government contracts.
• Prepare the working capital sufficiency memorandum with a 20% revenue decline scenario analysis and a monthly cash flow forecast for 12 months post-prospectus, signed by both the sponsor and the reporting accountant.
• Schedule a pre-submission meeting with the HKEX Listing Division at least 30 days before the A1 submission to confirm the document checklist and address any specific industry or jurisdiction requirements, as recommended in the HKEX’s 2025 guidance letter GL92-25.