A European investor acquires a Delaware-incorporated target only to discover, six months post-closing, that undisclosed liabilities were not captured by the representations and warranties regime. The indemnification claim stalls because the escrow period has lapsed and the seller has dissolved the holding structure. At that point, the deal economics collapse – and the legal options narrow significantly.
M&A transactions in the United States are governed by a layered body of corporate legislation, securities regulation, and state-level company law, with Delaware corporate legislation serving as the dominant reference point for privately negotiated deals. A successful transaction requires a signed share purchase agreement (SPA) or merger agreement supported by thorough due diligence, regulatory clearances, and negotiated closing conditions. Timelines for mid-market cross-border acquisitions typically range from three to six months from letter of intent to closing, depending on deal complexity and regulatory requirements.
This page covers the primary legal instruments used in US M&A transactions, the procedural steps and timelines, common pitfalls for international acquirers. Cross-border considerations involving Brazil and the EU. Additionally, a self-assessment checklist to determine readiness before approaching a target.
The M&A regulatory environment in the United States
The United States does not operate a single federal M&A statute. Instead, transactions are shaped by a combination of state corporate legislation. most prominently Delaware's. federal securities regulation administered by the Securities and Exchange Commission (SEC). Antitrust rules enforced by the Department of Justice and the Federal Trade Commission. Additionally, sector-specific regulatory regimes covering banking, telecommunications, defence, and energy.
For private M&A, Delaware corporate legislation is the dominant reference point. The majority of US corporations and limited liability companies are incorporated in Delaware precisely because its corporate legislation and court system. the Court of Chancery. offer predictable. Well-developed rules on fiduciary duties, merger procedures, and appraisal rights. International clients often underestimate how much deal structuring turns on Delaware-specific rules rather than general US federal law.
Public M&A introduces additional layers. Securities legislation administered by the SEC governs tender offers, proxy solicitations, and disclosure obligations. Any acquisition of a public company above defined thresholds triggers mandatory disclosure filings and waiting periods. Non-compliance carries the risk of injunctions, rescission, and civil penalties.
Foreign investment in US businesses is also subject to review by the Committee on Foreign Investment in the United States (CFIUS), a federal inter-agency body. CFIUS review can delay or block transactions involving national security considerations. Sectors such as defence, critical technology, and critical infrastructure receive heightened scrutiny. International acquirers – particularly those from jurisdictions with strategic tension with the US – must account for CFIUS timelines at the planning stage, not as an afterthought.
State-level antitrust rules compound the federal picture. California, New York, and other states maintain independent competition regimes that can apply to transactions with significant in-state operations even when federal thresholds are not met. This is a common blind spot for cross-border acquirers focused solely on the Hart-Scott-Rodino federal notification regime.
Core instruments: from letter of intent to closing
US M&A transactions follow a well-defined sequence of instruments, each carrying distinct legal weight and risk allocation consequences.
Letter of intent. The process typically begins with a non-binding letter of intent (LOI) or term sheet. The LOI establishes the headline economics, deal structure (asset purchase versus stock or share purchase), and exclusivity period. The exclusivity clause – usually binding – is the most commercially significant provision. Exclusivity periods in US mid-market deals typically run from 30 to 60 days. Allowing a counterparty to extend exclusivity without delivering a signed purchase agreement is a common and costly error.
Due diligence. US due diligence is conducted simultaneously across legal, financial, tax, and operational workstreams. The legal workstream covers corporate records, material contracts, intellectual property ownership, employment arrangements, environmental liabilities, and pending or threatened litigation. In practice, US targets maintain virtual data rooms with extensive documentation. However, the scope of what is disclosed versus what is withheld is heavily negotiated through disclosure schedules attached to the SPA.
A frequent issue for foreign buyers is the distinction between actual knowledge diligence and constructive knowledge diligence in the US system. Sellers routinely limit representations to "the actual knowledge of specific individuals" listed in the agreement. This can leave a buyer with limited recourse for liabilities that were discoverable but not actually known by the named individuals. Engaging experienced US counsel to negotiate knowledge qualifiers before signing is not optional – it is the difference between meaningful and illusory seller representations.
Share purchase agreement or merger agreement. The SPA or merger agreement is the central transaction document. It defines the purchase price mechanism (locked-box or completion accounts), representations and warranties given by the seller, indemnification obligations, survival periods for claims, and closing conditions. US SPAs are detailed documents – typically 80 to 200 pages for mid-market deals – reflecting a heavily negotiated risk allocation rather than reliance on implied statutory protections common in civil law systems.
Representations and warranties insurance (RWI) has become standard in US private M&A above a certain deal size threshold. RWI shifts indemnification exposure from the seller to an insurer, which can accelerate deal timing and reduce escrow requirements. International buyers should understand, however, that RWI policies contain exclusions for known risks, matters in the disclosure schedules, and items identified during diligence. An RWI policy is not a substitute for thorough diligence – it is a complement to it.
Closing conditions. US M&A agreements specify conditions that must be satisfied before closing can occur. These include accuracy of representations at closing, material adverse change (MAC) conditions, regulatory clearances, and third-party consents. MAC clauses have been the subject of significant litigation in the Delaware Court of Chancery. The court has set a high bar for invoking a MAC to terminate a deal – and acquirers who attempt to exit on the basis of routine business deterioration face injunctions compelling them to close.
For a detailed overview of corporate structures available to foreign investors entering the US market. See our corporate law services in the United States. This covers Delaware LLC formation, governance requirements. Additionally, regulatory compliance for foreign-owned entities.
To receive an expert assessment of your acquisition structure in the United States, contact us at info@ferrazwhitmore.com.
Practical pitfalls for international acquirers
The gap between what US M&A documentation says and how it operates in practice is wider than most international buyers expect. Several recurring patterns produce significant post-closing complications.
Disclosure schedule mechanics. The seller's disclosure schedules serve a dual function in US deals: they carve out exceptions to representations, and they qualify the seller's indemnification obligations. Inadequate review of disclosure schedules during diligence – a common failure when international buyers delegate this review to generalist advisors – means that material exceptions are accepted without recognition. In practice, a single poorly reviewed schedule can eliminate a buyer's indemnification claim for a known liability worth millions.
Earnout disputes. Earnout provisions – deferred consideration tied to post-closing financial performance – are frequently used to bridge valuation gaps in US M&A. They are also the single greatest source of post-closing litigation. Courts, including US District Court and Court of Chancery judges, have developed a body of law around earnout obligations, including implied covenants governing post-closing management of the business. Buyers who fail to include detailed operational covenants in the earnout provisions frequently find that the seller's claims of bad faith earnout management are difficult to defeat.
Employee retention and non-compete enforceability. US employment legislation varies sharply by state. Non-compete agreements that are routine and enforceable in some states are void or severely limited in California, Minnesota, and other jurisdictions. For acquirers whose deal thesis depends on retaining key management under post-closing non-competes, a state-by-state analysis of enforceability is essential before signing, not after closing.
Tax structuring elections. US tax legislation offers structuring choices – notably the election to treat a stock acquisition as an asset acquisition for tax purposes, which can deliver significant step-up benefits. These elections are time-sensitive and must be coordinated with transaction counsel before closing. International buyers who complete a transaction without making the appropriate election cannot rectify the omission after the fact.
Arbitration clause selection. US M&A agreements frequently include dispute resolution clauses specifying JAMS or AAA arbitration as alternatives to litigation in the Court of Chancery. Each forum has different procedural rules, cost profiles, and arbitrator pools. Opting for JAMS or AAA arbitration without understanding the procedural implications – including discovery rules and interim relief availability – can disadvantage a foreign party accustomed to international arbitration under ICC or LCIA rules.
CFIUS timing failure. CFIUS review timelines – which can extend beyond 90 days in complex cases – are frequently underestimated. Where CFIUS review is likely mandatory or prudent, the transaction agreement must include a CFIUS-specific termination right and appropriate break fee provisions. Failure to account for CFIUS in the agreement structure creates an unpriced risk that can derail a transaction late in the process.
Cross-border considerations: Brazil and EU dimensions
International acquirers active in both the US and other markets – particularly Brazil and EU jurisdictions – face a distinct set of structural and regulatory issues that arise at the intersection of legal systems.
Brazilian acquirers in the US market. Brazilian companies acquiring US targets must navigate both US and Brazilian regulatory requirements. Brazilian foreign investment and tax legislation imposes specific reporting obligations on outbound acquisitions. Remittance of purchase price from Brazil is subject to exchange control rules administered by the Banco Central do Brasil. Coordinating the timing of Brazilian regulatory filings with US closing conditions requires careful sequencing – a failure at the Brazilian end can delay or jeopardise closing on the US side.
Competition clearance is a parallel issue. Where the target has Brazilian operations, Brazilian competition legislation may require notification to the Conselho Administrativo de Defesa Econômica (CADE) in addition to US antitrust filings. CADE and the US Federal Trade Commission operate under different notification thresholds, review timelines, and remedy frameworks. Achieving parallel clearance without triggering a hold-separate obligation in either jurisdiction requires experienced cross-border M&A counsel.
For clients active in both markets, our M&A services in Brazil cover the full range of Brazilian transaction procedures, CADE clearance, and cross-border structuring between the US and Brazilian markets.
European acquirers and CFIUS considerations. EU-based acquirers – including those from Portugal and other Member States – generally face a lower CFIUS risk profile than acquirers from jurisdictions on the CFIUS priority watch list. However, transactions involving critical technology, personal data of US citizens, or proximity to US government facilities remain subject to review. EU acquirers should also account for EU foreign subsidies regulation, which can require parallel filing with the European Commission for transactions above defined thresholds involving EU-subsidised entities.
Governing law and enforcement. Most US private M&A agreements are governed by Delaware law, with dispute resolution in the Delaware Court of Chancery or federal court. Enforcement of a Delaware Court of Chancery judgment in Brazil requires an exequatur (recognition and enforcement) proceeding before the Brazilian Superior Tribunal de Justiça (Superior Court of Justice). For EU-based sellers, enforcement of US judgments operates on a reciprocity and public policy basis – there is no multilateral treaty framework analogous to the Brussels Regulation applicable to intra-EU judgments. International acquirers relying on seller indemnification commitments should assess the practical enforceability of those commitments before the indemnification structure is finalised.
Currency and exchange risk in cross-border structures. Where purchase price payments flow across multiple currencies, exchange rate movements during the gap between signing and closing can materially affect deal economics. US deals frequently use locked-box mechanisms or closing adjustments denominated in US dollars. International buyers funding an acquisition in a non-dollar currency should address hedging arrangements and the interaction between the SPA's purchase price adjustment mechanism and currency fluctuation at the structuring stage.
A complementary resource for clients structuring US-based entities prior to acquisition is our guide to company formation in the United States, which covers entity choice, Delaware LLC mechanics, and regulatory registration for foreign-owned businesses.
For a tailored strategy on cross-border M&A involving the United States, reach out to info@ferrazwhitmore.com.
Self-assessment checklist before initiating a US M&A transaction
A US M&A transaction is appropriate to pursue if the following conditions are met and the following preparation has been completed.
Transaction readiness conditions:
- The target entity is identified and preliminary valuation parameters have been established.
- The acquirer has determined deal structure – stock purchase, asset purchase, or merger – and understands the tax and liability implications of each.
- CFIUS applicability has been assessed, and the acquirer is prepared for a voluntary or mandatory filing if required.
- Financing is committed or reliably available, and the funding currency and any exchange control requirements in the acquirer's home jurisdiction have been addressed.
- A US-qualified transaction counsel with experience in cross-border acquisitions has been engaged.
Before signing the letter of intent, verify:
- The exclusivity period and extension mechanics have been reviewed and capped.
- The deal structure and governing law have been agreed in principle – post-LOI renegotiation of these points is costly and frequently signals deal fatigue.
- Break fee provisions are adequate to compensate for regulatory delay or counterparty withdrawal.
Before signing the SPA, verify:
- Due diligence has covered all disclosure schedules, material contracts, and pending litigation – not merely corporate records and financials.
- Knowledge qualifiers in seller representations are limited to a defined list of named individuals with actual knowledge obligations.
- Indemnification caps, baskets, and survival periods are appropriate to the deal risk profile.
- RWI policy exclusions have been reviewed and residual uninsured risk has been assessed.
- Closing conditions are achievable within the agreed long-stop date.
- Dispute resolution provisions specify the chosen forum – JAMS, AAA arbitration, or federal court – with procedural rules that the acquirer has evaluated.
The transaction shifts from private M&A to a public M&A context – with SEC filings and additional compliance obligations – if any of the following triggers apply:
- The target has registered securities or is a reporting company under federal securities legislation.
- The acquisition structure involves a tender offer or proxy solicitation.
- Post-acquisition ownership will trigger beneficial ownership reporting thresholds.
Frequently asked questions
- How long does a private M&A transaction in the United States typically take from letter of intent to closing?
- Mid-market private acquisitions in the US typically close within three to six months of signing the LOI. The main variables are the complexity of due diligence, the number of regulatory clearances required, and whether CFIUS review applies. Transactions requiring Hart-Scott-Rodino antitrust filings must observe a statutory waiting period before closing. Deals with a CFIUS component often add six to twelve weeks to the overall timeline and should be accounted for in the long-stop date negotiated in the SPA.
- Is Delaware law always the governing law for US M&A agreements, and does it apply to non-US buyers?
- Delaware law governs the vast majority of US private M&A agreements because most US corporations and Delaware LLC entities are incorporated there. Additionally. Delaware corporate legislation and Court of Chancery jurisprudence are the most developed in the country. Parties are generally free to choose governing law by contract, and Delaware is the default choice of sophisticated US practitioners regardless of where the buyer is located. For international buyers, this means engaging counsel with specific Delaware corporate law experience rather than generalist US counsel. the nuances of Delaware appraisal rights. Fiduciary duty standards. Additionally, MAC case law are not uniform across US states.
- A common misconception is that representations and warranties insurance removes the need for thorough due diligence – is that accurate?
- No. RWI policies are underwritten on the basis of what was disclosed during due diligence, and they exclude known risks – meaning anything identified in the disclosure schedules or diligence process. Insurers conduct their own underwriting diligence before binding coverage. A weak or incomplete diligence process increases the number of known-risk exclusions in the policy and leaves the buyer with uninsured exposure on precisely the issues that warranted investigation. RWI is most effective as a risk transfer mechanism when paired with thorough, well-documented diligence. Engaging a lawyer in the United States with M&A underwriting experience before approaching the RWI market is strongly recommended.
About Ferraz & Whitmore
Ferraz & Whitmore is an international law firm based in Lisbon, advising business clients on M&A transactions across 46 jurisdictions, including the United States, Brazil, and the European Union. Our team combines Portuguese civil law expertise with English common law tradition to deliver cross-border transaction support at every stage of the deal cycle. from structuring and due diligence through SPA negotiation. Regulatory clearance, and post-closing integration. As an international law firm advising on US matters, we work alongside leading US local counsel to provide seamlessly coordinated advice for acquirers, sellers, and investors who need results-oriented guidance across multiple legal systems. The firm's M&A practice includes practitioners with experience advising on transactions subject to SEC oversight, CFIUS review, and cross-border arbitration under JAMS, AAA, and ICC rules. Our Lisbon base provides direct access to EU and Portuguese regulatory bodies. While our common law expertise supports deal structures governed by Delaware corporate legislation and enforced through US federal court or Delaware Court of Chancery proceedings. To discuss how our US M&A services apply to your transaction, contact us at info@ferrazwhitmore.com.
Disclaimer: This publication is provided for informational purposes only and does not constitute legal advice. The information herein should not be relied upon as a substitute for professional legal counsel tailored to your specific circumstances. Ferraz & Whitmore assumes no liability for actions taken or not taken based on the contents of this material. For advice regarding your particular situation, please contact info@ferrazwhitmore.com.