DOJ Antitrust Division review is the competition review of a transaction by the Antitrust Division of the U.S. Department of Justice — the second of the two federal antitrust enforcers, alongside the FTC. Like the FTC, the DOJ examines whether a deal would substantially lessen competition under Section 7 of the Clayton Act, using the same HSR process and the joint Merger Guidelines.
DOJ vs FTC
The two agencies divide work through the clearance process, mostly along industry lines. The DOJ has traditionally reviewed:
- telecommunications and media, airlines and transportation, financial services and payments, agriculture, defense, and parts of technology;
while the FTC covers healthcare, pharma, retail and others. Only one agency reviews a given deal, and the substantive standard is the same — the difference is institutional, not legal.
The key procedural distinction: courts
The most important practical difference is how each agency blocks a deal:
- The DOJ must go directly to federal district court and sue to enjoin a transaction; it has no in-house adjudication. A DOJ challenge is therefore a conventional federal antitrust lawsuit, won or lost before a judge.
- The FTC can seek a federal preliminary injunction and use its own internal administrative adjudication.
For merging parties, this means a DOJ challenge plays out as litigation in the federal courts (with notable recent cases across airlines, publishing, telecom and technology), where precedent and the assigned judge loom large.
How a DOJ review proceeds
The arc mirrors the FTC's: an HSR filing starts the initial waiting period; concerning deals draw a Second Request and a months-long investigation; and the matter resolves in one of three ways — clearance, a consent decree requiring divestitures or conduct remedies to preserve competition, or a lawsuit to block. The DOJ analyzes market definition, concentration, unilateral and coordinated effects, entry and efficiencies under the Guidelines.
Enforcement posture
As with the FTC, the DOJ's appetite for challenging deals varies with leadership and administration. The early 2020s brought a more assertive Antitrust Division — more litigation, skepticism of behavioral remedies in favor of structural divestitures or outright blocking, and expanded theories of harm. Parties to a DOJ-reviewable deal weigh both the competitive facts and the litigation risk before a federal judge when pricing antitrust risk into the deal.
See also
- Antitrust and merger control — Government review of mergers to prevent harm to competition.
- FTC merger review — Competition review of a transaction by the U.S. Federal Trade Commission, sharing jurisdiction with the DOJ Antitrust Division for HSR-reportable deals.
- Hart-Scott-Rodino Act — The U.S. Hart-Scott-Rodino Antitrust Improvements Act of 1976, which requires premerger notification and an initial waiting period for transactions exceeding statutory size thresholds.
- Second Request — An extended antitrust investigation under HSR in which the reviewing agency demands additional information after the initial 30-day waiting period, lengthening review by months.
- Market definition — The threshold step in any antitrust merger analysis: identifying the relevant product and geographic market in which the parties compete, against which concentration is then measured.