The Sponsor Due Diligence Checklist: What Every Pre-IPO Company Must Prepare

The timeline for a Hong Kong Main Board listing has compressed from a typical 8-12 month pre-filing preparation window to an effective 6-9 month sprint, driven by the SFC’s intensified scrutiny of sponsor work in 2024-2025. The Securities and Futures Commission (SFC) issued 23 disciplinary actions against sponsors and their principal officers between 2020 and 2024, with fines ranging from HKD 3 million to HKD 150 million per case, according to SFC Enforcement Reports. The most common failure identified in these actions was inadequate due diligence on revenue verification, customer concentration, and related-party transactions. For a pre-IPO company, the sponsor’s due diligence is not a passive audit; it is the single most determinative factor in whether the listing application survives the HKEX’s vetting process under the Listing Rules and the SFC’s dual-filing regime under the Securities and Futures Ordinance (SFO). The sponsor’s work product—the due diligence checklist, the verification memos, and the sponsor’s declaration—must withstand scrutiny from both the HKEX Listing Division and the SFC’s Corporate Finance Division. This article provides a comprehensive checklist of the documentation, data, and corporate structures every pre-IPO company must prepare before engaging a sponsor, structured around the three pillars of sponsor liability: business verification, legal and regulatory compliance, and financial integrity.

The Business Verification Pillar: Revenue, Customers, and Supply Chain

The SFC’s 2023 enforcement action against a major sponsor firm for failing to verify the existence of a PRC-based manufacturing client’s factory—later found to be a shell—established a clear precedent: physical site visits and independent third-party confirmations are non-negotiable. The sponsor must satisfy itself that the applicant’s revenue is genuine, its customers are real, and its supply chain is operational.

Revenue Recognition and Customer Due Diligence

The sponsor will require a granular breakdown of the top 20 customers by revenue for each of the three most recent completed financial years, plus the stub period. For each customer, the company must provide: signed sales contracts, purchase orders, delivery receipts with third-party logistics provider signatures, and proof of payment (bank statements showing the customer’s remittance). The SFC’s Code of Conduct for Persons Licensed by or Registered with the SFC (Chapter 17, paragraph 17.6) mandates that the sponsor must verify the accuracy of revenue recognition policies against HKFRS 15. For companies with a customer concentration ratio exceeding 30% of total revenue from any single customer, the sponsor will require site visits to that customer’s premises, interviews with the customer’s procurement officers, and a review of the customer’s audited financial statements to confirm their ability to pay.

A common trap for pre-IPO companies is the presence of “circular trading” or “back-to-back” arrangements where the company sells to a customer who simultaneously sells to a related party of the company. The sponsor will request a complete mapping of the ultimate beneficial owners (UBOs) of the top 10 customers. If any UBO is a PRC-registered individual or entity that appears on the company’s own shareholder register or related-party list, the transaction will be classified as a related-party transaction under HKEX Listing Rules Chapter 14A, triggering additional disclosure and independent shareholder approval requirements. The company must prepare a register of all UBOs for its top customers, certified by a PRC notary public or a Hong Kong solicitor, before the sponsor’s due diligence begins.

Supply Chain Verification and Inventory

For manufacturing or trading companies, the sponsor will insist on verifying the physical existence of inventory and production capacity. The HKEX Listing Decision LD117-2023 (a non-public decision, but widely cited in sponsor guidance notes) established that a sponsor must conduct unannounced site visits to at least the company’s primary production facility and the facilities of its top three suppliers by value. The company must prepare: a detailed inventory list by SKU (stock-keeping unit) with quantities, unit costs, and locations; third-party warehouse confirmations if inventory is held off-site; and production capacity reports (e.g., machine hours, throughput rates) certified by an independent engineer or industry consultant.

The sponsor will also request a breakdown of the top 10 suppliers by procurement value. For each supplier, the company must provide: the supplier’s business license (for PRC entities), a list of the supplier’s own top customers to check for circularity, and proof of the supplier’s financial capacity (audited financials or bank statements). If any supplier is a related party of the company, the sponsor will require a transfer pricing study prepared in accordance with the OECD Transfer Pricing Guidelines and the PRC’s State Administration of Taxation (SAT) Circular 6 (2017). The company should commission this study at least six months before the sponsor’s due diligence commences, as it typically takes 3-4 months to complete.

The Legal and Regulatory Compliance Pillar: Corporate Structure, Licenses, and Litigation

The HKEX’s Listing Decision LD143-2024, which rejected a listing application due to unresolved PRC regulatory approvals for the company’s core business, underscores the criticality of pre-emptive legal compliance. The sponsor must be satisfied that the applicant holds all material licenses, permits, and approvals required to operate its business, and that its corporate structure does not contravene PRC or Hong Kong law.

Corporate Structure and VIE Arrangements

For PRC-based companies using a Variable Interest Entity (VIE) structure, the sponsor will require a complete legal opinion from a PRC law firm (qualified to issue opinions for HKEX listing purposes) confirming the VIE structure’s compliance with PRC regulations on foreign investment, including the 2020 Foreign Investment Law and the 2021 Negative List. The sponsor will also request: the full text of all VIE agreements (exclusive option agreements, equity pledge agreements, proxy agreements, and technical consulting services agreements); the register of shareholders of the VIE entity, showing any PRC nationals who hold the equity; and a risk disclosure memo outlining the specific enforcement risks identified by the PRC legal counsel. The HKEX’s Guidance Letter HKEX-GL94-18 (revised 2023) requires that the VIE structure must be the only viable structure for the company’s industry, and the sponsor must confirm that no alternative structure (e.g., a direct equity interest) is available under PRC law.

The company must also prepare a complete corporate structure chart showing all entities in the group (BVI, Cayman, Hong Kong, PRC, and any other jurisdiction), with the registered office address, date of incorporation, and principal activity for each entity. The sponsor will cross-reference this chart against the company’s statutory registers and the PRC’s National Enterprise Credit Information Publicity System (NECIPS) database. Any discrepancy—such as a dormant PRC entity that has not filed annual returns for two consecutive years—will be flagged as a material compliance issue requiring remediation before the A1 filing.

Licenses, Permits, and Regulatory Approvals

The sponsor will compile a schedule of all material licenses required for the company’s operations, cross-referenced against the applicable PRC or Hong Kong regulations. For example, a fintech company must hold a valid Money Service Operator (MSO) license from the Hong Kong Customs and Excise Department, or a PRC-based online education company must hold an ICP (Internet Content Provider) license from the Ministry of Industry and Information Technology (MIIT). The company must provide: a copy of each license, the date of issuance and expiry, the issuing authority, and evidence of renewal applications where applicable. The sponsor will also request a legal opinion confirming that the company’s business activities do not fall into any category requiring a license that the company does not hold.

The SFC’s Code of Conduct (Chapter 17, paragraph 17.7) requires the sponsor to review all material litigation, arbitration, or administrative proceedings involving the company or its directors. The company must prepare: a litigation schedule listing all current and threatened proceedings, with the case number, court or tribunal, parties, claim amount, and status; copies of all pleadings, judgments, and settlement agreements; and a legal opinion from the company’s litigation counsel assessing the probability of an adverse outcome and the potential financial impact. If any director or controlling shareholder has been subject to regulatory enforcement action in any jurisdiction (including the PRC’s CSRC, the SFC, or overseas regulators), the sponsor will require a full disclosure and a legal analysis of whether such action triggers a disqualification under HKEX Listing Rules Chapter 3.08.

The Financial Integrity Pillar: Audited Accounts, Tax Compliance, and Cash Flow Verification

The SFC’s 2024 enforcement action against a sponsor for failing to detect fabricated bank statements—where the company falsified HKD 50 million in cash deposits—led to a HKD 80 million fine and a suspension of the sponsor’s license for three years. The financial due diligence pillar is the most document-intensive and the most scrutinized by the regulators.

Audited Financial Statements and Reconciliation

The company must provide audited financial statements for the three most recent completed financial years, prepared in accordance with HKFRS or IFRS, with an unqualified audit opinion from a PCAOB-registered or HKICPA-registered auditor. The sponsor will require a full reconciliation between the company’s management accounts and the audited financials for each period, including a detailed breakdown of any adjustments made during the audit. The sponsor will also request the auditor’s management letter, which identifies any material weaknesses in internal controls, and the company’s remediation plan for each weakness.

A critical area of focus is the verification of cash and bank balances. The sponsor will require direct confirmations from all banks where the company holds accounts, sent by the sponsor to the bank’s compliance officer, with the response returned directly to the sponsor (not through the company). The company must provide a complete list of all bank accounts (including dormant accounts) with the account number, bank name, branch, and account signatories. The sponsor will also request bank statements for the most recent 12 months for each account, to verify the pattern of deposits and withdrawals. Any unexplained large deposits (e.g., a deposit of over HKD 10 million from an unidentified source) will trigger a request for the underlying contract and the counterparty’s identity.

Tax Compliance and Transfer Pricing

The sponsor will require tax compliance certificates from the relevant tax authorities for the three most recent financial years. For PRC companies, this includes the Enterprise Income Tax (EIT) filing receipts, VAT filing receipts, and the annual EIT reconciliation report. The sponsor will also request a tax health check report from a PRC tax advisor (a licensed CPA firm) confirming that the company has no outstanding tax liabilities, no ongoing tax audits, and no material tax risks. For companies with cross-border transactions within the group, the sponsor will require a transfer pricing documentation package prepared in accordance with the PRC’s SAT Circular 6 (2017) and the OECD’s BEPS Action 13 standards. This package must include: a master file, a local file, and a country-by-country report (if applicable), along with a benchmarking study showing that the group’s intercompany pricing is at arm’s length.

The sponsor will also scrutinize the company’s tax incentive arrangements. If the company benefits from a PRC High and New Technology Enterprise (HNTE) certificate, which provides a reduced EIT rate of 15% (versus the standard 25%), the sponsor will require confirmation that the company meets all HNTE criteria (e.g., R&D expenditure as a percentage of revenue, number of IP registrations, and technical staff ratios). The HKEX’s Listing Decision LD135-2023 rejected an application where the company’s HNTE certificate had expired and was under renewal, as the sponsor could not confirm the company’s tax position for the current year.

Related-Party Transactions and Cash Flow Verification

The sponsor will require a complete schedule of all related-party transactions (RPTs) for the three most recent financial years, including the nature of the transaction, the amount, the terms, and the identity of the related party. For each RPT, the company must provide the underlying contract and evidence of the transaction’s execution (e.g., bank transfer records, invoices, delivery receipts). The sponsor will assess whether each RPT is on arm’s-length terms and whether it requires disclosure or shareholder approval under HKEX Listing Rules Chapter 14A. If the company has a history of non-arm’s-length RPTs (e.g., loans to directors at zero interest, or sales to related parties at below-market prices), the sponsor will require a remediation plan, including the repayment of all outstanding amounts and the implementation of a RPT policy for the listed group.

The sponsor will also conduct a cash flow verification exercise to ensure that the company’s reported profits are supported by actual cash inflows. This involves a reconciliation of the company’s profit before tax to its operating cash flow for each of the three financial years, with a detailed explanation of any significant differences (e.g., large accruals, non-cash expenses, or changes in working capital). The sponsor will also request the company’s cash flow projections for the next 12 months, to assess whether the company has sufficient liquidity to meet its obligations post-listing. If the company’s cash conversion cycle (days sales outstanding plus days inventory outstanding minus days payable outstanding) exceeds 120 days, the sponsor will flag this as a risk factor requiring additional disclosure in the prospectus.

Actionable Takeaways

1. Commission a PRC legal opinion on your VIE structure and a transfer pricing study from a qualified tax advisor at least six months before engaging a sponsor, as both documents take 3-4 months to complete and are the most common causes of A1 filing delays.
2. Prepare a complete UBO register for your top 20 customers and top 10 suppliers, certified by a PRC notary or Hong Kong solicitor, to pre-empt the sponsor’s circular trading analysis.
3. Obtain direct bank confirmations from all account-holding banks at least three months before the sponsor’s due diligence begins, as banks in certain PRC jurisdictions require 4-6 weeks to process such requests.
4. Compile a litigation schedule covering all current and threatened proceedings, with legal opinions from your litigation counsel, and disclose any director enforcement actions immediately to avoid a disqualification risk under HKEX Listing Rules Chapter 3.08.
5. Ensure your auditor’s management letter includes a remediation plan for any material weakness in internal controls, as the sponsor will require evidence of implementation before the A1 filing.