What Is a Business Combination Agreement? Analysing the Core Document of a SPAC Deal

The Business Combination Agreement (BCA) is the single most consequential document in any SPAC transaction, yet its complexity is frequently underestimated by market participants outside the US legal sphere. For Hong Kong-based sponsors, CFOs, and cross-border investors evaluating de-SPAC targets in 2025, the BCA has evolved from a standard merger template into a highly negotiated instrument that dictates deal economics, regulatory compliance pathways, and post-combination governance. With the SEC’s 2024 final rules on SPACs now fully in effect — imposing enhanced disclosure requirements under Rule 14a-101 (Schedule 14A) and codifying the legal liability of SPAC underwriters — the BCA must now explicitly address projections, fairness opinions, and redemption scenarios with a level of detail previously reserved for traditional IPOs. For Asian issuers pursuing a NYSE or NASDAQ listing via a SPAC, understanding the BCA’s structural provisions is no longer optional; it is the difference between a successful closing and a terminated agreement.

The Structural Anatomy of a Business Combination Agreement

A BCA is a definitive agreement that governs the merger, share exchange, asset acquisition, or similar transaction between a SPAC (Special Purpose Acquisition Company) and a target operating company. Under US corporate law, the BCA functions as the master contract that supersedes all prior letters of intent and term sheets, binding both parties to a specific transaction structure, consideration mechanism, and closing timeline. For Hong Kong practitioners accustomed to the HKEX Listing Rules’ treatment of “very substantial acquisitions” under Chapter 14, the BCA serves a comparable function but with materially different legal consequences under Delaware General Corporation Law (DGCL) and SEC regulations.

Consideration Structure and Earn-Out Mechanics

The BCA specifies the exact consideration payable to the target’s shareholders. This is typically structured as a mix of SPAC common shares, sponsor promote shares, and contingent earn-out rights. In a standard 2025 de-SPAC transaction, the consideration is calculated using a formula: (SPAC Trust Value + PIPE Proceeds – Redemption Amount) / De-SPAC Share Price. The BCA must identify the “Exchange Ratio” or “Conversion Ratio” with precision, as this determines the percentage of post-combination equity held by legacy target shareholders.

Earn-out provisions are a distinct feature of SPAC BCAs, reflecting the need to bridge valuation gaps between sponsor and target. Under Section 9.2 of the typical BCA template, earn-out shares are released upon achieving specified stock price thresholds — often HKD-equivalent of USD 12.00, USD 15.00, and USD 18.00 over 20 consecutive trading days within 36 months post-closing. The SEC’s 2024 rules now require these earn-out targets to be disclosed in the proxy statement with sensitivity analysis under varying market conditions, a requirement that directly impacts how Hong Kong family offices model their return scenarios.

Representations, Warranties, and Disclosure Schedules

The BCA’s representation and warranty section is the primary risk allocation mechanism. Target companies must disclose all material contracts, litigation, regulatory compliance, intellectual property, and financial statements through disclosure schedules attached to the BCA. For a PRC-based target with a VIE structure, the BCA must explicitly address the enforceability of the VIE agreements under PRC law, referencing the 2023 Provisions of the Supreme People’s Court on Several Issues Concerning the Trial of Foreign-Related Civil and Commercial Cases. The failure to adequately scope these representations was the direct cause of at least three terminated SPAC deals in 2024 involving Chinese targets, according to data from SPAC Research.

The Regulatory Compliance Framework Embedded in the BCA

The BCA is not merely a commercial contract; it is a regulatory compliance document that must satisfy both SEC disclosure requirements and stock exchange listing standards. For a target seeking a NYSE or NASDAQ listing, the BCA must be filed as an exhibit to the Form S-4 or F-4 registration statement, making it a publicly available document subject to SEC review and shareholder litigation risk.

SEC Rule 14a-101 and Proxy Statement Integration

Under the SEC’s 2024 final rules, the BCA must be accompanied by a proxy statement that complies with Schedule 14A. This proxy statement must include a “fairness analysis” prepared by the SPAC’s board of directors or a financial advisor, evaluating whether the transaction is fair to the SPAC’s public shareholders from a financial point of view. The BCA itself must contain a provision obligating the SPAC to prepare and file this proxy statement within 45 days of signing, failing which the target may terminate the agreement.

Hong Kong-based sponsors should note that the SEC now treats SPAC underwriters as “statutory underwriters” for purposes of Section 11 of the Securities Act of 1933. This means that any material misstatement in the BCA or the proxy statement exposes the underwriters — often including Hong Kong-licensed investment banks acting as placement agents — to joint and several liability. The SFC’s Code of Conduct for Persons Licensed by or Registered with the Securities and Futures Commission (Chapter 571) requires Hong Kong intermediaries to conduct adequate due diligence on any offshore transaction they participate in, creating a direct cross-border compliance obligation.

HKEX Listing Rules Implications for Dual-Listed Entities

For targets that are already listed on the Hong Kong Main Board or GEM and pursuing a US SPAC merger, the BCA must address the implications under HKEX Listing Rules Chapter 14 (Notifiable Transactions) and Chapter 14A (Connected Transactions). A de-SPAC transaction that results in a change of control or a disposal of a substantial part of the target’s assets may trigger a disclosure obligation under Rule 14.06. The BCA should include a condition precedent requiring the target to obtain any necessary shareholder approval under the HKEX Listing Rules before closing. Failure to do so was a contributing factor in the delayed closing of at least one 2024 cross-border SPAC transaction involving a Hong Kong-listed biotech company.

The Termination and Redemption Dynamics

The BCA’s termination provisions are the most heavily negotiated sections, as they determine the circumstances under which either party can walk away and the financial consequences of doing so. For SPACs, the primary risk is excessive redemptions, which can reduce the trust below the minimum cash condition required for closing.

Termination Triggers and Break Fees

Standard BCAs include mutual termination rights, termination by the SPAC if the target suffers a material adverse effect (MAE), and termination by the target if the SPAC fails to obtain shareholder approval. The MAE definition is critical: under Delaware case law, an MAE must be “durationally significant” and “materially adverse” to the target’s overall business. The BCA typically carves out changes in general economic conditions, industry-specific downturns, and regulatory changes, but the SEC’s 2024 rules now require the target to disclose any MAE-related litigation risks in the proxy statement.

Break fees in SPAC BCAs are typically 3-5% of the trust value, payable by the SPAC to the target if the SPAC terminates for reasons other than target breach. This is lower than the 6-8% seen in traditional M&A, reflecting the SPAC’s limited ability to pay. However, the BCA may also include a reverse break fee payable by the target if it accepts a superior proposal — a provision that Hong Kong targets must negotiate carefully, as it can effectively lock a company into a SPAC deal even if a better traditional IPO opportunity emerges.

Redemption Mechanics and Minimum Cash Condition

The BCA must specify the mechanism for public shareholders to redeem their shares in connection with the shareholder vote. Under the SEC’s 2024 rules, the redemption deadline must be set at least two business days before the shareholder meeting, and the BCA must include a formula for calculating the per-share redemption price (typically the trust value divided by the number of outstanding public shares). The minimum cash condition — often set at USD 50 million to USD 100 million — is a condition precedent to closing. If redemptions reduce the trust below this threshold, the SPAC must either secure additional PIPE financing or terminate the deal.

For Hong Kong investors evaluating a SPAC’s trust, the BCA should be cross-referenced with the trust agreement filed as an exhibit to the SPAC’s IPO prospectus. The trust agreement governs the investment of trust proceeds in permitted US Treasury securities or money market funds, and any deviation from these investment parameters could trigger a redemption right under the BCA.

Post-Combination Governance and Listing Requirements

The BCA does not end at closing. It establishes the governance framework for the combined entity, including board composition, shareholder rights, and listing compliance obligations. For a target seeking a NYSE or NASDAQ listing, the BCA must include provisions that ensure compliance with the exchange’s continued listing standards.

Board Composition and Sponsor Rights

The BCA typically grants the SPAC sponsor the right to designate a certain number of board seats post-closing, often 2-3 out of a 7-member board. This is documented in a “Registration Rights Agreement” and a “Investor Rights Agreement” that are exhibits to the BCA. For Hong Kong targets, the BCA should also address compliance with the Hong Kong Corporate Governance Code (Appendix 14 of the HKEX Listing Rules) if the combined entity maintains a secondary listing in Hong Kong. The requirement for independent non-executive directors (INEDs) under Rule 3.10 of the HKEX Listing Rules may conflict with the sponsor’s desire for board control, requiring careful drafting of the BCA’s governance provisions.

Listing Compliance and Lock-Up Agreements

The BCA must include a condition that the combined entity meets all initial listing requirements of the chosen exchange. For NASDAQ, this includes the $1.00 bid price requirement, the $5 million market value of publicly held shares, and the 400 round lot shareholders requirement under NASDAQ Listing Rule 5450. The BCA typically requires the target to provide a legal opinion from US counsel confirming listing eligibility.

Lock-up agreements are attached as exhibits to the BCA, restricting the sale of sponsor shares and target shareholder shares for 6-12 months post-closing. Under the SEC’s 2024 rules, lock-up provisions must be disclosed in the proxy statement, and any waiver of lock-up restrictions requires SEC review. For Hong Kong-based sponsors, this creates a liquidity constraint that must be factored into fund return projections.

Actionable Takeaways

1. The BCA’s representation and warranty section must include explicit PRC law enforceability language for any target operating through a VIE structure, referencing the 2023 Supreme People’s Court Provisions.
2. Hong Kong sponsors must ensure their due diligence covers the SEC’s 2024 underwriter liability rules, as any material misstatement in the BCA exposes the sponsor to Section 11 claims.
3. The minimum cash condition in the BCA should be set at a level that accounts for historical redemption rates of comparable SPACs, which averaged 65-75% in 2024 for SPACs with Chinese targets.
4. Earn-out provisions must include sensitivity analysis under varying stock price scenarios, as required by the SEC’s 2024 proxy statement rules.
5. Dual-listed targets must include a condition precedent requiring HKEX shareholder approval under Chapter 14 of the Listing Rules before the SPAC closing can proceed.