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A free scan shows the junk files, broken settings and background clutter dragging Windows down - then fixes them in one click.Free scan · Windows 10 & 11CFIUS and antitrust review ask different questions, use different legal authorities and can apply to the same transaction. CFIUS examines national-security risks tied to certain foreign investments and U.S. real-estate transactions; the DOJ Antitrust Division and FTC examine whether mergers may harm competition. Completing one review does not, by itself, resolve the other.
What each review is designed to assess
| Comparison | CFIUS | Antitrust merger review |
|---|---|---|
| Core question | Does a covered transaction present a national-security risk? | May the transaction violate competition laws by harming competition? |
| Authority and lead bodies | The Committee on Foreign Investment in the United States, an interagency body chaired by the Treasury Secretary, operates under section 721 of the Defense Production Act and implementing regulations. | The Department of Justice Antitrust Division and the Federal Trade Commission administer federal merger review. HSR notifications are submitted to both. |
| Typical filing route | A CFIUS declaration or notice, depending on the transaction and applicable rules. Some filings are mandatory; others are voluntary. | For a transaction that meets the Hart-Scott-Rodino Act’s applicable requirements and is not exempt, the parties submit premerger notifications and observe the initial waiting period. |
| Possible further information demand | CFIUS may seek relevant supplemental information as part of its review. | The reviewing agency may issue a Second Request for additional information and documents. |
| Potential response | CFIUS may pursue national-security mitigation or other action available under its authorities; the possibilities depend on the transaction and legal posture. | The antitrust agencies may investigate and pursue enforcement if they conclude the transaction violates competition law. |
The filing triggers and detailed jurisdictional tests are not interchangeable. CFIUS can reach certain non-controlling foreign investments and some transactions involving U.S. real estate. HSR applies only when statutory and regulatory requirements are met, including applicable size thresholds, and exemptions may apply. Because thresholds, coverage and exemptions are fact-specific and can change, check current agency guidance and regulations for the particular deal rather than relying on a general summary.
When a transaction may face both
A foreign investment may raise a national-security question and also affect competition—for example, if it combines competing businesses or changes the structure of a market. The relevant facts can overlap, but the agencies assess them under distinct mandates. Ownership, control, assets, technology, sensitive data, customers and timing may matter to each review in different ways.
As a result, parties should assess CFIUS coverage and antitrust obligations independently. Do not assume every foreign-backed deal triggers either process, or that a filing or favorable outcome in one process substitutes for the other. The official materials summarized here do not establish a universal sequencing rule or a cross-clearance rule.
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How the filing and review mechanics differ
CFIUS declarations and notices
The applicable CFIUS filing route depends on the transaction and the governing rules. Treasury says the formal review period for a notice begins when CFIUS receives a complete notice, so an incomplete submission can affect when that formal clock starts. Parties should confirm whether a filing is mandatory and which route applies to their specific transaction.
Treasury’s FAQ says information can be useful even when a subject is not the business’s primary commercial activity. Its examples include cyber systems, products and services; natural-resource processing and energy production or transport; the rationale for the transaction; and other applicable national-security regimes, including ITAR, EAR and NISPOM. Treasury also notes that some other regulatory processes may have longer deadlines than CFIUS.
HSR notification and possible Second Request
For an HSR-reportable transaction, the parties notify the FTC and DOJ before consummation and must observe the initial waiting period. The agency reviewing the deal may issue a Second Request for further transaction-related information and documents. The length of the initial waiting period and the obligations in a particular matter depend on the applicable rules and circumstances; the DOJ overview cited here does not state a general duration to apply to every deal.
In a July 23, 2026 announcement, DOJ said the Antitrust Division had resumed targeted Second Request investigations, using priority information and timing agreements in appropriate cases. DOJ also said full compliance may still be required when broader information is needed. That describes the Division’s announced approach, not a guarantee that a particular investigation will be narrow or follow a fixed schedule.
Plan for the reviews as distinct workstreams
- Check coverage separately. Determine whether the facts bring the transaction within CFIUS jurisdiction, including any applicable mandatory-filing rule, and whether HSR notification is required or an exemption applies. The tests and exceptions differ.
- Build a shared, accurate account of the deal. Document ownership and control, business operations, assets, technology, data, customers, market context, transaction rationale and expected timing. Treasury specifically encourages relevant operational and national-security information; antitrust review focuses on competition issues.
- Map filings, information demands and deadlines. Track the CFIUS route and notice-completeness requirements separately from HSR notification, the initial waiting period and any Second Request. Treasury cautions that other regulatory processes may take longer than CFIUS.
- Coordinate without conflating the analyses. Keep factual descriptions consistent across submissions, while addressing national-security concerns and competition concerns on their own terms. A fact relevant to both reviews may require different explanation or evidence in each.
- Use transaction-specific advice for timing and closing decisions. Neither the sources summarized here nor a general description of the regimes supplies a complete calendar for every deal. Parties need to evaluate current rules, the transaction’s facts and any agency requests before relying on an assumed closing sequence.
What the published CFIUS timing statistic does—and does not—show
Treasury’s 2025 annual-report data, released August 7, 2026, say that 67 percent of distinct transactions were cleared either in the 30-day assessment period for declarations or in the initial 45-day review period for notices. The statistic combines two different CFIUS tracks; it is not a single timeline for all filings, a forecast for an individual transaction or a general success rate for a particular deal type.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Recent CFIUS policy context
Treasury’s overview identifies a 2026 Request for Information concerning a Known Investor Program and process streamlining. That is a policy-development item, not evidence that filing requirements have changed. Treasury also says a final rule updating the definition and list of military installations in the real-estate regulations took effect December 9, 2024; parties considering a real-estate transaction should check the current rules for its location and facts.
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