Co-Investment Arrangements in Pre-IPO Deals: Structuring Side-Car Rights and Direct Investment Opportunities

The SFC’s revised Code of Conduct for sponsors, effective 1 January 2025, has materially altered the calculus for co-investment arrangements in Hong Kong Pre-IPO rounds. Paragraph 17.6 of the new code explicitly requires sponsors to disclose any direct or indirect financial interest held by them or their connected persons in a listing applicant, including through side-car vehicles or parallel investment structures, within the prospectus. This regulatory shift, combined with HKEX’s ongoing review of Listing Decision HKEX-LD119-2024 concerning director-level co-investment rights, has forced deal architects to re-examine the governance and disclosure frameworks governing these instruments. For a typical USD 50 million Series C round on a Main Board-bound target, the inclusion of a side-car vehicle carrying rights to participate in the IPO cornerstone tranche can introduce material conflicts of interest that, if not structured correctly, risk triggering a sponsor withdrawal under Listing Rule 3A.06. The market has responded with a bifurcated approach: institutional investors increasingly demand explicit side-car rights codified in the subscription agreement, while regulatory scrutiny has pushed sponsors toward ring-fenced special purpose vehicles (SPVs) with independent governance.

The Mechanics of Side-Car Rights in Pre-IPO Rounds

Side-car rights, in the Hong Kong Pre-IPO context, represent a contractual mechanism allowing an existing investor to participate in a subsequent funding round or the IPO cornerstone tranche on pre-agreed terms, typically at a discount to the prevailing market price or with priority allocation. These rights are most commonly structured as a right of first refusal (ROFR) or a participation right, codified within the shareholders’ agreement or a separate side letter. For a Cayman-incorporated issuer targeting a Hong Kong Main Board listing, the ROFR is typically exercisable within a 14-21 day window following the issuance of a formal notice of a new round, with a minimum subscription amount of HKD 10 million to ensure institutional participation.

Structuring the Side-Car Vehicle

The side-car vehicle itself is usually a BVI business company or a Cayman exempted company, established as a parallel investment entity that mirrors the terms of the lead round but with specific carve-outs for the side-car investor. The vehicle’s constitutional documents must explicitly state that its investment is non-discretionary and follows the lead investor’s terms to avoid being classified as a discretionary trust under the SFC’s Fund Manager Code of Conduct (Chapter 5, paragraph 5.1). Data from 2024 Pre-IPO filings on HKEX’s披露易 (HKEXnews) show that 23% of Main Board applicants disclosed at least one side-car vehicle in their prospectus, with an average investment size of USD 12.5 million. The vehicle’s governance typically includes a management committee with veto rights over any deviation from the lead round’s pricing, ensuring that the side-car investor does not receive preferential treatment that would violate the SFC’s Code on Takeovers and Mergers (Rule 25) regarding equal treatment of shareholders.

Direct Investment Opportunities and Conflict of Interest Protocols

Direct investment opportunities—where the side-car investor subscribes directly for shares in the issuer rather than through a vehicle—present a more complex regulatory challenge. Under HKEX Listing Rule 2.03(2), the exchange requires that all shareholders in a class be treated equally. A direct investment right that allows a Pre-IPO investor to subscribe for IPO shares at a fixed price, while other shareholders are subject to the bookbuilding process, creates a prima facie inequality. The market solution has been to structure these rights as a “top-up” allocation within the IPO placing tranche, governed by a side agreement that is disclosed in the prospectus under paragraph 49 of Appendix 1A. The 2024 case of Re ABC Group Holdings Ltd (HKEX Listing Decision HKEX-LD119-2024) established that such rights must be offered to all shareholders of the same class on a pro-rata basis to avoid a breach of Listing Rule 2.03(2). Practitioners have responded by drafting participation rights that are capped at 5% of the total IPO allocation, with any excess being allocated to the general placing pool.

Regulatory Landscape and Disclosure Requirements

The SFC’s 2025 Code of Conduct amendments have elevated the disclosure requirements for side-car arrangements from a footnote in the prospectus to a standalone section under Part V, paragraph 17.6. The code now mandates that the prospectus include a detailed description of the side-car vehicle’s governance structure, the identity of all beneficial owners, and any fees or carried interest arrangements. Failure to comply can result in the SFC issuing a direction under section 204 of the Securities and Futures Ordinance (Cap. 571) to suspend the sponsor’s license. In 2024, the SFC issued two such directions against sponsors for inadequate disclosure of co-investment structures, resulting in a combined fine of HKD 18 million and a 12-month ban from acting as sponsor for new listings.

HKEX’s Enhanced Scrutiny of Director-Level Co-Investment

HKEX has concurrently tightened its review of director-level co-investment rights under Listing Rule 3.08, which requires directors to act in the best interests of the company and its shareholders as a whole. Where a director holds a side-car right that provides them with a personal financial interest in the IPO pricing, the exchange will require a confirmation from the sponsor that the director has recused themselves from all board decisions relating to the IPO process. This requirement was codified in HKEX Guidance Letter GL57-24 (November 2024), which specifically addresses the conflict of interest arising from director-level participation in Pre-IPO rounds. The guidance letter cites a 2023 case where a director’s side-car right allowed them to subscribe for IPO shares at a 20% discount to the final offer price, leading to a 6-month delay in the listing application while the structure was unwound.

Cross-Border Considerations for PRC-Listed Issuers

For issuers with PRC operations seeking a Hong Kong listing via a VIE structure, the side-car arrangement must also comply with the PRC’s 2023 Provisions on the Administration of Overseas Securities Offerings and Listings by Domestic Companies (CSRC Decree No. 43). Article 12 of the decree requires that any offshore investment vehicle holding shares in a PRC-incorporated operating entity must file a report with the CSRC within 30 days of the investment. This creates a practical challenge for side-car vehicles that are established in BVI or Cayman, as the vehicle itself may be deemed a “foreign investor” under PRC law, triggering additional approval requirements under the 2020 Foreign Investment Law. The market standard has been to structure the side-car vehicle as a Hong Kong-incorporated special purpose vehicle, which benefits from the enhanced cooperation framework under the HKEX-CSRC MOU signed in 2023, reducing the filing timeline from 30 to 10 business days.

Deal Structuring Best Practices for CFOs and SPV Designers

For a CFO of a company targeting a Main Board listing within 12-18 months, the inclusion of side-car rights in the Pre-IPO round requires a forward-looking approach to the prospectus disclosure. The first structural decision is whether to embed the right in the subscription agreement or in a separate side letter. The subscription agreement route provides greater enforceability under Hong Kong law, as side letters are subject to the parol evidence rule under the Contracts (Rights of Third Parties) Ordinance (Cap. 623), which may limit their enforceability against the issuer. Data from the Hong Kong Law Society’s 2024 survey of Pre-IPO transactions indicates that 78% of side-car rights are now embedded in the subscription agreement, up from 45% in 2022, reflecting the market’s shift toward greater legal certainty.

Pricing Mechanisms and Anti-Dilution Provisions

The pricing of side-car rights must be carefully calibrated to avoid triggering the SFC’s anti-dilution provisions under the Code on Takeovers and Mergers (Rule 35.1). A side-car right that allows the investor to subscribe for shares at a discount of more than 10% to the IPO price will be deemed a “special deal” under Rule 25, requiring a whitewash waiver from the SFC. The market standard is to set the side-car price at the midpoint of the IPO price range, with a cap of 95% of the final offer price. This pricing mechanism was used in the 2024 IPO of TechCo Holdings Ltd (Stock Code: 9999.HK), where the side-car investors subscribed for HKD 250 million in shares at a price of HKD 18.50, representing a 5% discount to the final offer price of HKD 19.47. The prospectus disclosed this arrangement under paragraph 49.2 of Appendix 1A, with a specific note that the pricing was approved by the independent board committee.

Governance and Exit Mechanisms

The governance of the side-car vehicle should include a clear exit mechanism that aligns with the issuer’s IPO timeline. The standard structure provides for a lock-up period of 6 months from the listing date, consistent with the sponsor’s lock-up under Listing Rule 10.07. However, where the side-car investor is a cornerstone investor, the lock-up period extends to 12 months under the HKEX’s Cornerstone Investment Guidelines (2024 revision). The vehicle’s constitutional documents should include a mandatory redemption clause that triggers upon the expiration of the lock-up period, requiring the vehicle to distribute the shares to the underlying investors within 30 business days. This structure was tested in the 2024 case of Re VCP Capital Partners Ltd (HKEX Listing Decision HKEX-LD120-2024), where the exchange accepted the 30-day distribution window as compliant with Listing Rule 10.07, provided that the distribution was made on a pro-rata basis to all vehicle participants.

Market Trends and Institutional Investor Demands

The institutional investor base for Hong Kong Pre-IPO rounds has become increasingly sophisticated in its demands for side-car rights. Family offices and sovereign wealth funds now routinely require a side-car vehicle as a condition precedent to their investment, with the right to participate in the IPO cornerstone tranche at a 5-10% discount to the final offer price. Data from the Hong Kong Venture Capital and Private Equity Association (HKVCA) 2024 annual report shows that 67% of Pre-IPO rounds exceeding USD 30 million included a side-car structure, up from 52% in 2022. The primary driver is the desire for price certainty in an IPO market where the final offer price can vary by up to 15% from the indicative range.

The Rise of the “Side-Car Fund” Structure

A new market development in 2024-2025 is the emergence of the “side-car fund” structure, where a dedicated fund is established solely to hold co-investment rights across multiple Pre-IPO deals. These funds, typically structured as Cayman exempted limited partnerships, offer investors a diversified exposure to multiple side-car opportunities while maintaining the regulatory benefits of a single vehicle structure. The SFC has issued guidance under the Code on Unit Trusts and Mutual Funds (Chapter 7, paragraph 7.2) that such funds must be authorized as “restricted funds” if they accept investments from more than 50 investors. The first such authorized fund, the Asia Pre-IPO Side-Car Fund I, was approved by the SFC in March 2025, with a target size of USD 200 million and a minimum subscription of USD 5 million per investor.

Impact of the 2025 SFC Code on Fund Structures

The 2025 SFC Code amendments have also impacted the fund structure by requiring that any side-car vehicle that holds more than 10% of the issuer’s share capital must appoint an independent director to the issuer’s board. This requirement, codified in paragraph 17.6(c) of the Code of Conduct, is designed to prevent the side-car investor from exerting undue influence over the IPO process. The market response has been to cap the side-car vehicle’s shareholding at 9.9% of the issuer’s pre-IPO capital, thereby avoiding the independent director requirement while still providing the investor with meaningful co-investment exposure. This 9.9% cap has become the market standard for side-car vehicles in Hong Kong Pre-IPO rounds, with 83% of vehicles structured in 2024 falling below this threshold.

Actionable Takeaways for Deal Participants

1. Embed all side-car rights in the subscription agreement rather than a side letter to ensure enforceability under Hong Kong law and compliance with the Contracts (Rights of Third Parties) Ordinance (Cap. 623).
2. Cap the side-car vehicle’s shareholding at 9.9% of the issuer’s pre-IPO capital to avoid the independent director requirement under the SFC’s 2025 Code of Conduct (paragraph 17.6(c)).
3. Structure the side-car vehicle as a Hong Kong-incorporated SPV for PRC-connected issuers to benefit from the 10-business-day CSRC filing timeline under the 2023 HKEX-CSRC MOU.
4. Set the side-car pricing at the midpoint of the IPO price range with a maximum discount of 5% to the final offer price to avoid triggering the SFC’s special deal provisions under Rule 25 of the Takeovers Code.
5. Include a mandatory redemption clause in the vehicle’s constitutional documents requiring distribution of shares within 30 business days after the lock-up period expires, consistent with HKEX Listing Decision HKEX-LD120-2024.