A European technology company signs a distribution agreement with a US partner. The contract contains a clause restricting the partner from selling below a fixed price. Back in Europe, resale price maintenance operates in a legal grey zone. In the United States, the same clause draws immediate scrutiny under federal antitrust legislation – and can expose both parties to criminal prosecution, civil damages, and regulatory enforcement. The gap between how competition law works abroad and how it operates in the US is one of the costliest surprises for international businesses entering the American market.
Competition law compliance in the United States is governed primarily by federal antitrust legislation. Enforced by two federal agencies. the Department of Justice Antitrust Division and the Federal Trade Commission. as well as through private litigation in US District Court. Companies must address three core obligations: avoiding cartel conduct, managing market dominance responsibly, and filing for merger notification when transaction thresholds are met. Failure to comply carries criminal exposure, treble damages, and mandatory divestiture.
This guide covers the procedural requirements and documentary checklist for US antitrust compliance, the step-by-step timeline for merger notification. Common errors by foreign businesses operating in the US. Additionally, a decision framework for different market scenarios.
The regulatory system: who enforces US antitrust law and why it matters
The United States operates a dual federal enforcement system. The Department of Justice Antitrust Division handles criminal cartel prosecutions and reviews mergers in certain sectors. The Federal Trade Commission acts as a parallel competition authority with broad civil enforcement powers. Both agencies share merger review responsibilities across different industries.
State attorneys general add a third enforcement layer. They may bring independent antitrust actions under state competition legislation. In practice, multi-state enforcement actions are common in consumer-facing industries. This means a foreign business can face simultaneous federal and state investigations for the same conduct.
Private enforcement is a defining feature of US antitrust law. Any person or entity harmed by anticompetitive conduct may bring a civil claim in federal court. Successful plaintiffs recover treble damages – three times the actual loss – plus legal fees. This private litigation mechanism makes the US antitrust environment considerably more exposed than most civil law jurisdictions. A cartel that causes measurable harm to buyers can generate class-action claims running into the hundreds of millions of dollars.
The per se rule and the rule of reason are the two analytical tools courts apply. Per se illegality applies to hard-core cartel conduct: price-fixing, bid-rigging, market allocation, and output restriction. These are treated as automatically unlawful – no efficiency justification is accepted. The rule of reason applies to conduct with plausible competitive benefits, such as certain vertical restraints, joint ventures, and information-sharing arrangements. Courts in the United States weigh pro-competitive effects against harm to competition under a structured analysis.
Foreign companies structured as a Delaware LLC (a limited liability company formed under Delaware corporate legislation) often assume that their US subsidiary is insulated from antitrust exposure. This assumption is incorrect. The parent company's conduct abroad may be attributable to the US entity if it produces effects on American commerce. Federal courts apply the effects doctrine broadly.
Step-by-step: building a competition compliance programme
Effective competition law compliance in the United States requires a structured programme. The following steps apply to any business with a US market presence, regardless of size or sector.
Step 1 – Risk mapping (weeks 1–2). Identify all business activities that involve contact with competitors: trade association participation, standard-setting bodies, joint procurement, data sharing, licensing arrangements. For each activity, assess whether the conduct could be characterised as price coordination, market division, or output limitation. Document the assessment in writing.
Step 2 – Policy drafting (weeks 2–4). Prepare a written antitrust compliance policy tailored to the business. Generic templates drawn from foreign jurisdictions are inadequate. The policy must address the specific categories of conduct the business engages in. It should cover communications with competitors, pricing decisions, trade association conduct, and the handling of confidential competitor information.
Step 3 – Training (weeks 4–6). Deliver in-person or recorded training to all employees with commercial responsibilities. Training must be jurisdiction-specific. Employees who regularly attend industry events or trade association meetings need separate, more detailed sessions. Document attendance and test completion.
Step 4 – Merger notification assessment (ongoing). Before any acquisition, investment, or joint venture, run a threshold analysis under US merger notification rules. The filing obligation arises when both the size-of-transaction and size-of-person tests are met under applicable merger control legislation. Thresholds are adjusted periodically. The filing is made jointly by both parties to the transaction.
Step 5 – Internal reporting channel (weeks 6–8). Establish a confidential reporting channel for employees to raise competition concerns. Designate a responsible officer – typically the general counsel or an external competition lawyer – to review reports. Document all reports and the responses taken.
Step 6 – Periodic review (annually). Review the compliance programme at least once per year. Update it to reflect changes in enforcement priorities, new business activities, and any internal incidents. US antitrust enforcement priorities shift with administrations, and the programme must remain current.
The documentary checklist for a baseline compliance programme includes: a written antitrust policy signed by senior management. training records with dates and employee names. a merger notification threshold assessment for each M&A transaction. records of trade association participation including meeting agendas and minutes. and a log of any internal competition concerns raised and resolved.
For advice on structuring a compliance programme that holds up under agency scrutiny, contact us at info@ferrazwhitmore.com.
Merger notification: procedural timeline and documentary requirements
US merger notification is mandatory when a transaction meets the statutory thresholds set out in federal merger control legislation. Both parties must file a Hart-Scott-Rodino (HSR) premerger notification form with the Department of Justice and the Federal Trade Commission before closing. The obligation applies to acquisitions of voting securities, assets, and non-corporate interests.
The initial waiting period is 30 days from the date of filing. The agencies may grant early termination of this period for straightforward transactions. If the reviewing agency requires additional information – known as a second request – the waiting period extends by a further 30 days after the parties substantially comply with the request. Complex transactions can remain under review for six months or longer.
The HSR form requires detailed information on the transaction structure, the parties' revenues and assets, the products and services they supply, and the overlapping markets affected. Supporting documents include the most recent annual reports, financial statements, and any documents prepared by or for senior management that discuss the competitive effects of the transaction. The document production obligation is broad. Companies that fail to preserve and produce responsive documents risk significant civil penalties.
Filing fees are determined by the value of the transaction and are payable at the time of filing. Fee levels change periodically under federal legislation. Both parties are responsible for their own filing fees.
Foreign-to-foreign transactions are not automatically exempt. A transaction between two non-US companies must be notified if both parties have sufficient US nexus – typically measured by US sales or US assets. Many international businesses are surprised to find that an acquisition agreed in Europe or Asia triggers a mandatory US filing. Missing the filing deadline exposes the parties to civil penalties calculated on a per-day basis from the closing date.
For transactions involving companies with corporate disputes or contested deal structures in the United States, the merger review process can intersect with litigation timelines. Coordinating the two tracks requires careful sequencing.
A practical scenario: a European acquirer buys a mid-sized US software business. The transaction value exceeds the applicable HSR threshold. The acquirer's European counsel confirms the deal is cleared under EU merger regulation. The US filing is nevertheless mandatory and independent of the EU process. The acquirer files, the 30-day period runs, and the agency grants early termination. Total elapsed time from filing to clearance: 18 days. Had the acquirer closed without filing, the daily civil penalty exposure would have begun accruing immediately.
Common errors by foreign clients and their consequences
Foreign businesses entering the US market make a recognisable set of compliance errors. Each carries direct legal and financial consequences.
Treating trade association meetings as low-risk. Executives from international markets often participate in US trade association meetings without understanding that discussions of pricing trends, capacity plans, or customer territories can constitute cartel conduct. The Department of Justice has brought criminal prosecutions arising directly from trade association activity. Employees who attend these meetings without clear guidance on what they may and may not discuss represent a material exposure.
Importing compliance policies from the home jurisdiction. A competition compliance policy designed for an EU or Latin American business does not translate directly to the US setting. The per se categories are broader in the US. The private litigation risk – including class actions under federal antitrust legislation – has no direct equivalent in most civil law systems. A policy that passes muster in Sao Paulo or Madrid may leave a US operation materially exposed.
Assuming that market dominance alone is lawful. US antitrust legislation does not prohibit market dominance as such. However, exclusionary conduct by a dominant firm – exclusive dealing, predatory pricing, tying arrangements, or refusals to deal – can constitute unlawful monopolisation. Foreign executives accustomed to EU competition rules, which prohibit the abuse of a dominant position, sometimes assume the US standard is equivalent. The US doctrine of monopolisation is analytically distinct and requires careful assessment.
Missing the leniency programme window. The Department of Justice operates a leniency programme (also called the Corporate Leniency Policy) that grants immunity from criminal prosecution to the first cartel participant that self-reports. Cooperates fully, and meets specified conditions. Companies that discover potential cartel conduct in their operations face a critical timing decision. The window for being first in is narrow. Delay – while internal investigations proceed – can result in a competitor filing first and the company losing immunity entirely. The cost of missing this window is severe: criminal fines, individual prosecutions of executives, and civil treble damages exposure.
Underestimating the reach of US extraterritorial jurisdiction. Federal courts apply US antitrust legislation to foreign conduct that produces a direct, substantial, and reasonably foreseeable effect on US commerce. Agreements concluded entirely outside the US – at an overseas trade fair, by email between foreign offices – are actionable if the effect lands in the American market. Practitioners advising clients entering the US through a Delaware LLC or other US vehicle consistently note that parent-level conduct abroad is the most frequently overlooked risk.
A cross-border illustration: a Japanese manufacturer and a Korean competitor agree at a trade fair in Seoul to allocate customers by geography, with the US market reserved for the Japanese party. Both companies sell into the US. The agreement, though concluded abroad, falls within the reach of US antitrust legislation. Both companies face exposure to Department of Justice criminal investigation, SEC-related disclosure obligations if either is publicly listed, and private class-action claims in US District Court from US buyers.
Disputes arising from competition-related conduct can also be resolved through private arbitration. JAMS (Judicial Arbitration and Mediation Services) and AAA arbitration (American Arbitration Association) are the two principal private arbitral institutions for commercial disputes in the United States. However, criminal antitrust enforcement cannot be arbitrated – only civil damages claims between private parties are amenable to arbitration clauses.
For a preliminary review of your business's competition compliance exposure in the United States, email info@ferrazwhitmore.com.
Decision framework: which compliance path suits your scenario
Not every business faces the same antitrust risk profile. The appropriate compliance investment depends on the nature of the business, its market position, and how it interacts with competitors. Use the following framework to determine the right approach.
Scenario A – Market entry with no US competitor contacts. A foreign business sells products or services into the US but does not attend trade association meetings. Does not participate in joint ventures. Additionally, has no distribution agreements with US competitors. The primary risks are vertical restraints in distribution contracts and merger notification obligations if acquisitions are planned. A written compliance policy, training for commercial staff, and merger threshold monitoring are sufficient at this stage.
Scenario B – Active participation in US trade associations or standards bodies. This scenario carries meaningfully higher cartel exposure. The compliance programme must address trade association conduct specifically. Employees attending meetings need written guidance on permissible and impermissible discussions. The business should consider retaining US competition counsel to attend sensitive meetings or review agendas in advance.
Scenario C – Market dominance in a US product or geographic market. A business with substantial market share – particularly one that has grown through acquisitions or holds key technology or infrastructure – must monitor its conduct for exclusionary effects. Exclusive dealing arrangements, loyalty rebates, and refusals to supply require legal review before implementation. The rule of reason analysis for dominant firms is fact-intensive and requires ongoing legal assessment.
Scenario D – Discovery of potential past cartel conduct. If internal documents, whistleblower reports. Alternatively. Third-party contacts suggest that the business or its employees may have been involved in price-fixing, bid-rigging. Alternatively, market allocation, the leniency programme decision must be made promptly. Engaging US competition counsel immediately – before any external disclosure – is essential. The sequencing of an internal investigation, a potential leniency application, and cooperation with any parallel civil litigation requires careful coordination.
Scenario E – Cross-border acquisition triggering US merger notification. The threshold analysis should be conducted as early as possible in deal planning. If a filing is required, both parties must prepare HSR submissions and coordinate document production. The acquirer should build the 30-day minimum waiting period into the transaction timeline. If a second request is anticipated, the timeline extends substantially and the deal timetable must reflect this.
For businesses comparing their obligations across jurisdictions, our guide to competition law compliance in Brazil addresses the parallel requirements under Brazilian antitrust legislation and merger control rules. The two systems share structural similarities but diverge in key procedural respects.
A self-assessment checklist before implementing any US market strategy:
- Does the business have direct or indirect contact with US competitors through any channel?
- Does any distribution, licensing, or supply agreement restrict pricing, territory, or customers?
- Does the business have or is it seeking a market position that could attract monopolisation scrutiny?
- Is any acquisition, investment, or joint venture planned that could meet HSR notification thresholds?
- Has the business conducted a written antitrust risk assessment in the past 12 months?
Frequently asked questions
Q: How long does the US merger notification review process take?
A: The initial waiting period under US merger notification rules is 30 days from the date of filing, though the agencies may grant early termination. If the reviewing agency issues a second request for documents, the waiting period extends by an additional 30 days after the parties substantially comply. Complex transactions can take six months or longer from initial filing to clearance.
Q: Can a foreign company be investigated for antitrust violations under US law even if it operates outside the United States?
A: Yes. US antitrust legislation applies to conduct that has a direct, substantial, and reasonably foreseeable effect on US commerce, regardless of where the conduct occurs. Foreign companies that participate in cartels, coordinate pricing, or engage in market allocation with effects on the US market are subject to federal enforcement action, including criminal prosecution and civil claims in US District Court.
Q: What is a common misconception foreign businesses have about US antitrust compliance?
A: A widely held misconception is that only dominant or large-market-share companies face meaningful antitrust risk. In reality, cartel offences – including price-fixing and bid-rigging – are per se illegal under US antitrust legislation regardless of market size. Even businesses with modest market presence can face criminal prosecution and private class-action claims if their employees coordinate with competitors, whether directly or through trade associations.
About Ferraz & Whitmore
Ferraz & Whitmore is an international law firm based in Lisbon, advising business clients across 46 jurisdictions. Our competition law practice supports international companies entering and operating in the US market – covering antitrust compliance programmes, merger notification filings, cartel investigations, and monopolisation assessments. Engaging a lawyer in the United States context who understands both common law antitrust doctrine and civil law competition regimes is a significant advantage for multinational businesses managing multi-jurisdictional exposure. Our attorneys have advised on competition matters before the Department of Justice, the Federal Trade Commission, and in private antitrust litigation in US District Court. As a law firm in the United States and cross-border practice context, Ferraz & Whitmore combines Portuguese civil law expertise with English common law tradition to serve clients across the Americas, Europe, and beyond. The firm's 15 practice areas and Lisbon base provide direct access to EU regulatory frameworks alongside US enforcement intelligence. To discuss your competition compliance obligations or a specific antitrust risk in the United States, 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.