# Antitrust merger review
> Source: https://legalcode.md/skills/legalcode-antitrust-merger-review | [HTML version](https://legalcode.md/skills/legalcode-antitrust-merger-review)

Analyzes pre-merger notification obligations and merger control strategy for transactions subject to antitrust review.

Analyzes pre-merger notification obligations and merger control strategy for transactions subject to antitrust review. Covers US HSR Act notification requirements, EU Merger Regulation (EC 139/2004) jurisdictional thresholds and clearance process, UK CMA review under the Enterprise Act 2002, market definition methodology (SSNIP/hypothetical monopolist test), competitive effects analysis (unilateral, coordinated, vertical, and conglomerate effects), gun-jumping risk management, remedy strategy (structural vs. behavioral), multi-jurisdictional coordination, and deal-timeline planning. Use when advising on M&A antitrust clearance, conducting pre-signing antitrust risk assessments, preparing HSR filings, negotiating merger remedies, managing parallel competition authority reviews, or counseling on standstill obligations and clean-team protocols. Jurisdiction-specific coverage of US (FTC/DOJ), EU (European Commission DG COMP), and UK (CMA).

This skill analyzes the antitrust merger control dimensions of M&A transactions, from pre-signing risk assessment through regulatory clearance and closing. **Covers:** - Filing obligation analysis for US (HSR Act), EU (EC 139/2004), and UK (Enterprise Act 2002) - Market definition and competitive effects analysis across merger types - Gun-jumping risk identification and clean-team protocol design - Merger remedy strategy (structural divestitures, behavioral commitments, fix-it-first) - Multi-jurisdictional clearance timeline coordination - Deal documentation strategy (Item 4(c)/4(d) document collection, competitive overlaps) - Phase classification (COMPLIANT / FLAG / BLOCKING) for each jurisdictional risk dimension - Confidence-scored analysis with Glass Box audit trail **Does not:** - Constitute filing advice or substitute for local antitrust counsel - Cover merger notifications outside US/EU/UK without jurisdiction extension - Address non-merger antitrust issues (cartel, abuse of dominance, vertical restraints) - Guarantee regulatory outcome — competition authority decisions are inherently uncertain This skill covers three primary jurisdictions. Each has distinct thresholds, timelines, and substantive tests. The analysis always identifies which jurisdictions are triggered and tailors the output accordingly. | Jurisdiction | Primary Law | Regulator | Substantive Test | |---|---|---|---| | **United States** | Clayton Act § 7; HSR Act (15 U.S.C. § 18a) | FTC / DOJ ...

## Jurisdictions

Global



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