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S 4734

Critical Defense Ownership Review Act

119th Congress Introduced by Richard Blumenthal and 1 co-sponsor

Requires DoD review and preapproval for certain investments by investment companies in major defense suppliers if they reach 25% ownership or control, protecting national security.

Introduced in Senate
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WeVote Research Nonpartisan
Bill Summary · S 4734

Summary: Critical Defense Ownership Review Act (S.4734, 119th Congress)

Purpose and intent

  • The bill, introduced by Sen. Warren (with Sen. Blumenthal as a cosponsor), aims to protect national defense interests by requiring government review of certain investments in major defense suppliers. It seeks to ensure acquisitions by investment companies do not undermine national security, the defense industrial base, or the Department of Defense’s (DoD) mission.

Key provisions and changes

  • Mandatory preapproval for certain investments (Section 2)

    • Prohibits an investment company from engaging in a covered transaction with a major defense supplier if the deal would result in:
    • 25% or greater direct or indirect equity interest, or
    • Direct or indirect control
    • This prohibition applies unless the tranaction receives prior review by the DoD.

  • Premerger notification requirement (Section 2)

    • Parties to a covered transaction must submit a premerger notification to the DoD, consistent with provisions in the National Defense Authorization Act for FY 2024 (Public Law 118-31; 15 U.S.C. 18a note).

  • DoD review of notifications (Section 2)

    • DoD must conduct a review of each premerger notification, assessing at minimum:
    • National security impact and effects on the defense industrial base and technology base; whether the deal serves the public interest.
    • Potential effect on competition for DoD contracts and future programs/technologies of interest.
    • Risks of restricting suppliers, goods, or services critical to the defense base, critical technologies, or national security.
    • Financial stability risks to the major defense supplier and continued ability to provide military capabilities; potential increased costs to DoD.
    • Any other factors that could affect successful completion of current/future DoD programs or operations.
    • Financial stability of the investment management company and whether its financial plan could impair the supplier’s ability to sustain DoD support.

  • Antitrust coordination (Section 2)

    • DoD must provide a report to antitrust authorities (FTC or DOJ Antitrust Division) within 30 days of receiving the premerger notification, detailing the DoD review findings.

  • Definitions (Section 2)

    • Control: The power to determine important matters affecting an entity.
    • Covered transaction: Any proposed merger, acquisition, joint venture, strategic alliance, or investment occurring after enactment.
    • Investment company: An entity that would be an investment company under the Investment Company Act of 1940, with certain exceptions.
    • Major defense supplier: A prime or subcontractor supplying or potentially supplying DoD, or a company with technology significantly relevant to defense; includes current primes of major systems and primes under certain DoD contracts.

  • Triennial review of M&A activity (Section 3)

    • The Assistant Secretary of Defense for Industrial Base Policy must conduct a triennial review of merger and acquisition activity involving major defense suppliers, including:
    • Assessing financial health post-merger/acquisition
    • Evaluating effects on the supply of essential goods/services for DoD missions
    • A formal triannual report due to Congressional defense committees by December 31, 2027, and every three years thereafter, detailing:
    • Findings of the prior three fiscal years
    • Effects on the defense industrial base
    • Mitigation actions for identified risks

Who is affected

  • Investment companies intending to acquire or invest in major defense suppliers, particularly where ownership or control could reach 25% or more.
  • Major defense suppliers (primes and subs) that participate in mergers, acquisitions, joint ventures, or strategic investments involving investment companies.
  • DoD and its Industrial Base Policy office, which would lead reviews and assess national security, industrial base health, and competitiveness implications.
  • Antitrust authorities (FTC and DOJ Antitrust Division), which receive periodic DoD reports to coordinate oversight.

Procedural and timeline aspects

  • Trigger: Any covered transaction after enactment that would meet the 25% equity or control threshold requires DoD review before completion.
  • Notification: Premerger notification to DoD required; DoD must review promptly.
  • Reporting to antitrust agencies: DoD must provide a written review to FTC/DOJ within 30 days of receiving notification.
  • Triannual reporting: DoD shall produce ongoing assessments every three years, with a comprehensive report due no later than December 31, 2027, and subsequently on a three-year cycle.

Potential impact and considerations

  • The act would introduce a robust, DoD-led gatekeeping process for defense-related investments by investment companies, aiming to preserve national security implications, maintain critical defense supply chains, and safeguard DoD program integrity.
  • It may affect the timeline and feasibility of certain investment transactions in the defense sector, particularly for entities seeking significant minority or controlling stakes in major defense suppliers.
  • Enhanced transparency and coordination with antitrust authorities are designed to align national security interests with competition policy.

Notes:
- The bill was introduced June 10, 2026, and referred to the Senate Judiciary Committee. Co-sponsors include Sen. Elizabeth Warren and Sen. Richard Blumenthal.

Compiled from official sources — confirm details with the bill’s official record.

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