What is National Security Review?

Definition

National Security Review is a regulatory assessment used to determine whether a transaction, investment, acquisition, merger, or other business arrangement could affect a country's national security interests. It commonly examines foreign investment, sensitive technologies, critical infrastructure, strategic assets, access to sensitive information, supply chains, and control of important businesses.

The review helps government authorities identify transactions that may create national security concerns and determine whether the transaction can proceed without conditions, requires mitigation measures, or needs further regulatory action. For finance and transaction teams, understanding the review is important because it can influence deal timing, transaction structure, valuation assumptions, financing arrangements, and closing conditions.

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How National Security Review Works

A National Security Review generally begins when a transaction falls within the jurisdiction of a relevant government authority or when the parties voluntarily notify the authority because national security considerations may be relevant. Some jurisdictions also allow authorities to initiate reviews independently.

The assessment typically considers the identities of the parties, ownership and control structures, business activities, geographic footprint, technology, data access, government relationships, and the assets being transferred. Authorities may request detailed information about the transaction and evaluate whether ownership or control could create strategic exposure.

In transaction planning, teams should establish an early regulatory workstream alongside financial, legal, tax, and operational diligence. A clear record of ownership, governance, technology dependencies, data flows, and critical suppliers can help support an efficient review.

Key Areas Examined

  • Foreign ownership and control: Authorities may assess who ultimately owns, controls, or influences the target and whether the investor has links to a foreign government.
  • Critical infrastructure: Businesses involved in energy, telecommunications, transportation, financial systems, defense, healthcare, or other strategic infrastructure may receive heightened attention.
  • Sensitive technology: Advanced technologies, intellectual property, cybersecurity capabilities, artificial intelligence, semiconductors, and specialized manufacturing can be relevant.
  • Data access: Reviews may consider whether a transaction provides access to sensitive personal, financial, government, or commercially important information.
  • Supply-chain resilience: Authorities can examine whether a transaction could affect the availability or reliability of strategically important products, services, or suppliers.

Role in Transaction Planning and Financial Decisions

National Security Review can affect the commercial assumptions behind a transaction. Buyers and sellers may need to account for regulatory approval requirements when setting signing and closing conditions, estimating transaction timelines, or determining whether a proposed structure is practical.

Financial models may incorporate different closing scenarios when regulatory review could influence transaction timing or required commitments. This can affect financing availability, working-capital planning, valuation expectations, and the timing of expected cash flows. In cross-border transactions, regulatory analysis should therefore be coordinated with investment strategy and broader transaction diligence.

Procurement exposure can also matter when the target supplies strategically important goods or services. Reviewing a purchase requisition process and related approvals can help identify how sensitive sourcing decisions are controlled, while examining the purchase order process can provide additional visibility into supplier relationships and procurement commitments.

Security and Technology Considerations

A National Security Review often overlaps with broader controls around technology, systems, and information. System Security provides a useful framework for assessing protections around business applications, access controls, infrastructure, and operational systems that could become relevant during regulatory diligence.

Data Security is equally important where a transaction involves sensitive customer, employee, financial, or government-related information. Mapping data ownership, access rights, storage locations, transfer mechanisms, and retention practices can help transaction teams explain how sensitive information is protected.

For transactions involving enterprise applications, ERP Security should also be considered because ERP environments can contain financial records, supplier information, operational data, and other business-critical information. Teams working across SAP, Oracle, Microsoft, or other ERP environments should align regulatory diligence with ERP Security Best Practices for Finance Teams (2026), particularly when ERP integration or migration is part of the transaction plan.

Review Readiness and Documentation

Strong preparation starts with identifying potentially sensitive assets and documenting who has access to them. Transaction teams should maintain clear ownership charts, technology inventories, data-flow documentation, supplier records, governance information, and descriptions of critical business activities.

Where financial or procurement workflows use intelligent systems, Audit Trails can provide a structured record of actions taken by humans or AI, helping reviewers understand who performed an activity, when it occurred, and what decision or workflow step followed.

Teams evaluating AI-enabled financial workflows can also use Evaluating Bot Security in Financial Automation: What You Need to Know to understand authentication, least-privilege access, and continuous monitoring considerations relevant to protecting sensitive financial data and automated processes.

Business Implications and Best Practices

  • Identify exposure early: Determine whether foreign ownership, sensitive technology, critical infrastructure, or protected data could bring the transaction within review requirements.
  • Coordinate diligence: Connect regulatory analysis with legal, financial, cybersecurity, technology, and operational diligence rather than treating security review as an isolated workstream.
  • Map control and access: Document ownership, voting rights, governance arrangements, system permissions, data access, and operational dependencies.
  • Model transaction scenarios: Reflect potential regulatory conditions and timing considerations in financial planning, financing, and cash-flow forecasts.
  • Maintain evidence: Keep consistent documentation supporting representations about ownership, technology, data, suppliers, and security controls.

Summary

National Security Review is an important regulatory consideration for transactions that may affect sensitive technologies, critical infrastructure, strategic assets, supply chains, or protected information. Its impact can extend beyond legal approval to transaction timing, deal structure, valuation, financing, and cash-flow planning. Early identification of review requirements, combined with well-organized ownership, technology, data, procurement, and security documentation, helps businesses make informed transaction and investment decisions.