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One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchCFIUS and antitrust review ask different questions, apply under different legal authorities and can both affect the same U.S. transaction. CFIUS examines national-security risks in certain foreign investments and real-estate transactions; the Department of Justice (DOJ) and Federal Trade Commission (FTC) examine whether mergers may harm competition. A filing, decision or review under one process does not, by itself, resolve the other.
What is the difference between CFIUS and antitrust review?
The central distinction is the risk each process evaluates. The Committee on Foreign Investment in the United States (CFIUS) reviews covered transactions for national-security concerns under section 721 of the Defense Production Act and its implementing regulations. Federal antitrust merger review evaluates whether a transaction may violate competition laws.
| Question | CFIUS | Antitrust merger review |
|---|---|---|
| What is being assessed? | National-security risk associated with a covered transaction. | Whether a transaction may harm competition or violate competition law. |
| Who reviews it? | CFIUS, an interagency committee chaired by the Treasury Secretary. | The DOJ Antitrust Division or the FTC conducts the federal merger review. HSR notifications go to both agencies. |
| What can trigger review? | Certain foreign investments, including some non-controlling investments, and certain U.S. real-estate transactions. | A transaction that meets the applicable Hart-Scott-Rodino (HSR) Act requirements, including current size thresholds, and is not exempt. |
| What is a central filing route? | A CFIUS declaration or notice, depending on the transaction and applicable rules; some filings are mandatory and others voluntary. | An HSR premerger notification for a reportable transaction, followed by a waiting period. |
| What further information may be requested? | CFIUS may seek relevant supplemental information during its process. | The reviewing agency may issue a Second Request for additional information and documents. |
| What concerns may lead to action? | National-security concerns may lead to mitigation or other action under CFIUS authorities. | Antitrust concerns may lead an agency to investigate and pursue enforcement. |
CFIUS operates under section 721, as amended, Executive Order 11858, as amended, and regulations in 31 CFR chapter VIII. The DOJ and FTC administer federal merger review under the competition laws, including the HSR premerger notification process. The exact jurisdictional test and procedural route depend on the transaction; the comparison above is not a substitute for checking the rules that apply to a specific deal.
Can one deal face both reviews?
Yes. A foreign investment might raise national-security questions and also change market structure—for example, by combining competitors. Each review has a separate mandate, so parties should assess CFIUS coverage and antitrust obligations independently. Not every foreign-backed deal triggers CFIUS review, and not every transaction is reportable under HSR.
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There is no universal sequencing rule established here that dictates which process must happen first. Nor should parties assume that a favorable outcome in one process settles the other: completing one review does not automatically substitute for, or clear a deal under, the other authority.
How do the filing and review mechanics differ?
CFIUS declarations and notices
Depending on the transaction and applicable rules, parties may submit a declaration or a notice. Filing obligations are transaction-specific: some filings are mandatory, while others are voluntary. Treasury says the formal review period for a notice starts when CFIUS receives a complete notice, so the time needed to prepare and complete a filing is distinct from that formal period.
Treasury reported that 67 percent of distinct transactions in 2025 were cleared either in the 30-day assessment period for declarations or in the initial 45-day review period for notices. This annual-report figure, released August 7, 2026, combines two different CFIUS tracks. It is not a success rate for any particular type of transaction, nor does it mean every filing has the same timeline.
HSR notification and possible Second Request
For a transaction that is reportable under HSR, the parties notify both the FTC and the DOJ Antitrust Division before consummation and observe the initial waiting period. The reviewing agency may then seek more transaction-related information and documents through a Second Request. Because the current thresholds, exemptions and timing rules can change, check the current FTC and DOJ guidance rather than relying on a past threshold figure or a general calendar estimate.
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Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Clear out junk files and repair common Windows errorsFree Scan →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 broader information may still be required when needed. That announcement describes an approach to investigations; it does not establish a guaranteed schedule or reduced information burden for every deal.
What information may matter to both reviews?
The same deal facts can be relevant for different reasons. Ownership, control, assets, technology, data, customers and timing may inform a CFIUS national-security assessment, an antitrust analysis, or both. Parties should coordinate their account of the transaction while tailoring each filing to the agency’s legal question.
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Treasury’s CFIUS FAQ says parties may help the review by supplying useful information even when the subject is not the business’s primary commercial activity. Its examples include:
- Cyber systems, products and services.
- Natural-resource processing, energy production and energy transport.
- The rationale for the transaction.
- Other applicable national-security review regimes, including ITAR, EAR and NISPOM.
Treasury also notes that some other regulatory processes may have longer deadlines than CFIUS. Parties should identify those obligations early rather than assume the CFIUS process will determine the overall deal timetable.
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How should parties plan for overlapping review?
- Check each jurisdictional trigger separately. Determine whether foreign-investment or real-estate rules bring the transaction within CFIUS’s scope, and separately assess whether HSR notification is required or an exemption applies.
- Confirm the current rules before setting dates. HSR thresholds and exemptions, CFIUS coverage and mandatory-filing rules are legal and transaction-specific details. Use current agency guidance and regulations for the relevant filing date.
- Map the separate filings and clocks. Distinguish a CFIUS declaration or notice from an HSR notification. Account for the fact that Treasury starts the formal notice review period after receiving a complete notice, while HSR has its own notification and waiting-period requirements.
- Prepare a consistent factual account with distinct analyses. Coordinate deal facts across submissions, but address national-security issues for CFIUS and competition issues for the reviewing antitrust agency. Be prepared for supplemental CFIUS requests or a Second Request in an antitrust review.
- Build transaction-specific timing into the closing plan. The sources do not establish one calendar or sequence that fits every deal. Parties should assess both processes early and get advice on the particular transaction before treating either review as complete.
What CFIUS developments are relevant to current planning?
Treasury’s current overview identifies a 2026 Request for Information concerning a Known Investor Program and process streamlining. It is a policy-development item, not evidence of a finalized change to filing requirements. Treasury also says a final rule changing the definition and list of military installations in its real-estate regulations became effective December 9, 2024. These developments do not replace a transaction-specific check of the rules in effect when a deal is assessed.
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