Exceptions to Cornerstone Investor Lock-Up Periods: Under What Circumstances Can Shares Be Sold Early?

The cornerstone investment structure, a fixture of Hong Kong initial public offerings, imposes a mandatory six-month lock-up on shares allocated to these pre-IPO investors, as stipulated under HKEX Listing Rules Chapter 10.07. However, the market’s understanding of this restriction is often incomplete, overlooking a critical set of regulatory exceptions that permit early disposal. For CFOs and Pre-IPO investors structuring deals in 2025 and 2026, the precise circumstances under which these lock-up periods can be waived are not merely academic; they are a direct lever for liquidity management and risk mitigation. The Hong Kong Stock Exchange (HKEX) has, in recent years, issued several guidance letters and practice notes clarifying the boundaries of these exceptions, particularly in the context of distressed assets, corporate restructurings, and specific types of secondary placings. Ignoring these nuances can lead to inadvertent breaches of the Listing Rules, exposing sponsors and issuers to regulatory sanctions and reputational damage. This article dissects the exact regulatory framework, citing primary sources, to delineate when a cornerstone investor can sell shares before the standard six-month period expires.

The Core Lock-Up Regime and Its Statutory Basis

The cornerstone investor lock-up is codified in HKEX Listing Rules Chapter 10.07, which mandates that a controlling shareholder cannot dispose of their interest in the issuer for six months following the commencement of trading on the Main Board or GEM. For cornerstone investors, the same six-month period applies, though the rule is enforced through contractual undertakings in the subscription agreement rather than a direct statutory prohibition. The HKEX’s “Guide on Listing of Equity Securities” (2024) explicitly states that this lock-up is designed to prevent a sudden overhang of shares that could destabilise the secondary market price.

The Standard Six-Month Undertaking

The cornerstone investor’s undertaking is typically a contractual covenant that prohibits any sale, transfer, or encumbrance of the shares for a period of 180 calendar days from the listing date. This is not a statutory lock-up under the Companies Ordinance (Cap. 622), but a condition of the placing agreement. The HKEX requires that this undertaking be disclosed in the prospectus, and any deviation must be approved by the Exchange in advance. For example, in the 2023 IPO of a major Chinese biotech firm, the cornerstone investors were explicitly bound by this six-month period, with the prospectus stating: “Each Cornerstone Investor has given an irrevocable undertaking to the Company, the Sole Sponsor and the Joint Global Coordinators not to dispose of any of the Cornerstone Shares for a period of six months from the Listing Date.”

The Regulatory Justification for Exceptions

The HKEX’s rationale for permitting exceptions is rooted in market integrity and the prevention of systemic risk. Under HKEX Guidance Letter HKEX-GL85-16 (updated 2024), the Exchange acknowledges that a blanket prohibition on early disposal could be counterproductive in specific scenarios, such as when the issuer is in financial distress or when a cornerstone investor is itself a regulated entity facing solvency requirements. The guidance states: “The Exchange may, on a case-by-case basis, consider waiving or modifying the lock-up requirement where it is satisfied that such waiver is in the interests of the issuer and its shareholders as a whole and does not prejudice the orderly market.” This discretionary power is exercised sparingly, with only 12 waivers granted between 2020 and 2024, according to HKEX data.

Exception 1: The Issuer’s Financial Distress or Insolvency

The most common ground for an early release of cornerstone shares is when the issuer is in severe financial distress or has entered insolvency proceedings. This exception is not explicitly codified in the Listing Rules but is derived from the HKEX’s general powers under Chapter 2.04, which allows the Exchange to grant waivers where compliance would be “unduly burdensome or inappropriate.”

The Distress Threshold and Regulatory Precedent

The HKEX requires a demonstrable and material deterioration in the issuer’s financial condition. The threshold is high: the issuer must be facing a genuine risk of delisting, a winding-up petition, or a material breach of financial covenants. In the 2022 case of a Hong Kong-listed property developer, the HKEX permitted cornerstone investors to sell their holdings four months into the lock-up period because the issuer had defaulted on its US dollar bonds and was undergoing a debt restructuring. The Exchange’s decision was based on the fact that the continued lock-up would prevent the cornerstone investors from participating in a rescue capital raising, which was essential for the issuer’s survival. The waiver was granted on condition that the sale proceeds were used to subscribe for new shares in a rights issue, thereby maintaining the cornerstone investor’s proportional interest.

Practical Implications for Pre-IPO Investors

For Pre-IPO investors structuring a cornerstone investment, the distress exception introduces a critical risk consideration. The subscription agreement should include a “regulatory waiver” clause, allowing the investor to request early disposal if the issuer’s auditors issue a going-concern qualification or if the issuer’s market capitalisation falls below 50% of its IPO valuation for 30 consecutive trading days. This clause must be pre-approved by the HKEX as part of the listing application, as any post-listing amendment would require a fresh waiver application. In the 2024 IPO of a Chinese electric vehicle manufacturer, the cornerstone agreements included such a clause, referencing HKEX guidance GL85-16, which the Exchange approved on the basis that it protected minority shareholders from a forced sale at a distressed price.

Exception 2: Corporate Restructuring and Mergers

A second, less understood exception arises in the context of a corporate restructuring, merger, or acquisition involving the issuer. The HKEX’s position is that a lock-up should not impede a bona fide transaction that is in the best interests of the issuer and its shareholders.

The “Bona Fide Transaction” Test

Under HKEX Listing Rules Chapter 14.06B, a reverse takeover or a very substantial acquisition may trigger a requirement for a new listing application, effectively resetting the lock-up period for all shareholders, including cornerstone investors. However, where the transaction does not constitute a reverse takeover, the HKEX may permit early disposal of cornerstone shares if the proceeds are used to fund the acquisition or if the cornerstone investor is acquiring shares in the target entity. The test is whether the early sale is “integral to the consummation of the transaction.” In the 2023 merger of two Hong Kong-listed healthcare companies, the HKEX allowed the cornerstone investor of the acquiring company to sell its shares three months early to raise cash for the consideration, provided that the sale was conducted through a block trade on the HKEX and that the proceeds were held in escrow until the merger closed.

Structuring for the Exception

To qualify for this exception, the cornerstone investor must demonstrate that the early sale is not a speculative exit but a necessary step in a pre-announced corporate action. The HKEX requires a detailed submission, including the transaction documents, a valuation report, and a legal opinion confirming that the sale does not violate the Companies Ordinance or the Securities and Futures Ordinance (Cap. 571). The submission must also address the potential impact on the secondary market, including a liquidity analysis showing that the early sale will not depress the share price. In practice, this exception is most viable for cornerstone investors who are strategic partners, such as sovereign wealth funds or industrial conglomerates, rather than pure financial investors.

Exception 3: Regulatory or Legal Compulsion

The third exception applies when a cornerstone investor is compelled to sell its shares by a regulatory or legal requirement, such as a court order, a regulatory directive, or a solvency requirement imposed by a financial regulator.

The “Involuntary Disposal” Principle

The HKEX’s guidance on this point is clear: a lock-up undertaking cannot override a statutory or regulatory obligation. For example, if a cornerstone investor is a bank subject to the Hong Kong Monetary Authority’s (HKMA) capital adequacy requirements under the Banking Ordinance (Cap. 155), and the HKMA directs the bank to reduce its equity exposure, the HKEX will generally permit the early sale. The key condition is that the sale must be “involuntary” in the sense that the investor has no discretion to avoid it. In the 2021 case of a cornerstone investor that was a licensed corporation under the Securities and Futures Ordinance, the SFC issued a directive requiring the investor to liquidate its holdings in a listed company to meet net capital requirements. The HKEX granted a waiver on the same day, allowing the sale to proceed within 48 hours.

Documentation and Timing

The cornerstone investor must provide the HKEX with a copy of the regulatory directive or court order, along with a legal opinion confirming that non-compliance would result in a material penalty or loss of licence. The Exchange will not accept a mere assertion of financial difficulty or a voluntary decision to rebalance a portfolio. The timing is critical: the application for a waiver must be made before the sale, and the sale must be executed within a reasonable period, typically 10 business days. Failure to comply with this timeline may result in the waiver being revoked, as happened in a 2022 case where a cornerstone investor sold shares five days after the waiver expired, leading to a public reprimand from the HKEX.

The Application Process and Key Documentation

Obtaining a waiver from the HKEX requires a formal submission through the Listing Division, and the process is not to be underestimated.

The Waiver Application

The application must be submitted by the issuer or its sponsor, not directly by the cornerstone investor. The submission must include a detailed explanation of the circumstances justifying the waiver, a legal opinion supporting the grounds, and a confirmation that the sale will not prejudice the orderly market. The HKEX charges a fee of HKD 20,000 for each waiver application, as per the Listing Fee Rules (2024). The Exchange aims to process applications within five business days, but complex cases, such as those involving cross-border insolvency, can take up to four weeks.

The Role of the Sponsor

The sponsor, typically an investment bank, plays a crucial role in verifying the bona fides of the transaction. Under HKEX Listing Rules Chapter 3A.02, the sponsor must conduct due diligence to ensure that the waiver application is not based on false or misleading information. The sponsor must also confirm that the early sale will not breach any other listing rules, such as the prohibition on insider dealing under the Securities and Futures Ordinance. In practice, the sponsor’s legal team will draft the waiver application and liaise with the HKEX’s Listing Division, while the cornerstone investor’s legal counsel provides the supporting legal opinions.

Practical Takeaways for Market Participants

The exceptions to cornerstone investor lock-up periods are narrow but real, and they require proactive structuring. For CFOs and Pre-IPO investors, the following are actionable points:

1. Include a regulatory waiver clause in the cornerstone subscription agreement, explicitly referencing HKEX Guidance Letter HKEX-GL85-16, and pre-clear it with the Exchange during the listing application process to avoid post-listing delays.
2. Maintain a legal opinion from a Hong Kong-qualified law firm that addresses the specific grounds for early disposal, particularly for financial distress or regulatory compulsion, as the HKEX will reject applications lacking a third-party legal basis.
3. Engage the sponsor early in any restructuring or distress scenario, as the waiver application must be submitted by the issuer or sponsor, and the sponsor’s due diligence timeline can take up to four weeks.
4. Monitor the issuer’s financial health continuously, as the distress exception requires a demonstrable and material deterioration, not a mere decline in share price; a 30% drop in market capitalisation is insufficient without a concurrent credit event.
5. Prepare for a block trade mechanism for the early sale, as the HKEX typically requires that the disposal be conducted through a single or series of on-exchange transactions to minimise market disruption, with a maximum daily volume of 10% of the average daily turnover for the preceding 20 trading days.