Explore why the Trump administration chose to keep merger guidelines intact in 2025. Learn how this decision impacts businesses, antitrust enforcement, and economic policy in the U.S.
Introduction
In February 2025, the Trump administration made a notable decision to retain the merger guidelines established in 2023 under the Biden administration. This move, detailed in memos from FTC Chair Andrew Ferguson and DOJ acting head Omeed Assefi, keeps a stricter framework for reviewing corporate mergers, surprising many who expected a more business-friendly approach. This article breaks down what these guidelines are, why they’re being kept, and how they impact businesses and U.S. antitrust policy, especially as of March 10, 2025.

What Are the 2023 Merger Guidelines?
The 2023 merger guidelines, released by the Department of Justice (DOJ) and Federal Trade Commission (FTC), are non-binding principles for evaluating mergers and acquisitions under antitrust laws. They replace earlier versions and focus on modern market challenges, with key changes including:
- Lowering the threshold for presumptive illegality, where a merger with over 30% market share and significant HHI increase is flagged.
- Expanding review to vertical and conglomerate mergers, assessing impacts on competition in adjacent markets.
- Considering effects on labor and suppliers, not just consumers, for a holistic view.
- Using direct evidence, like internal documents, alongside traditional metrics to gauge competitive effects.
This approach aims to prevent anticompetitive behavior, reflecting a shift towards more interventionist enforcement.
Why Is the Trump Administration Keeping Them?
Despite expectations of deregulation, the Trump administration’s decision to retain these guidelines seems driven by several factors:
- Stability and Predictability: Frequent changes can unsettle businesses, so keeping the guidelines ensures a stable regulatory environment, as noted in Ferguson’s memo (The Trump administration is reversing Biden policies everywhere. But it’s keeping this one | CNN Business).
- Bipartisan Consensus: Growing concern over market power, especially in tech, has bipartisan support, suggesting a shared view on needing robust antitrust measures.
- Populist Appeal: Aligning with voters skeptical of corporate power, this decision resonates with the administration’s populist rhetoric, as seen in comments from Vice President JD Vance (Trump administration keeps Biden merger review guidelines).
- Economic Considerations: Preventing concentrated markets may foster long-term innovation and consumer benefits, a strategic choice for economic health.

This retention, announced in February 2025, contrasts with typical Republican leanings, highlighting a nuanced approach to regulation.
Impact on Businesses
For businesses, retaining the 2023 guidelines means navigating a tougher merger landscape:
- Increased Scrutiny: More rigorous reviews, especially for horizontal mergers, could extend timelines and raise costs, as seen in recent healthcare M&A challenges (FTC retains stricter merger guidelines under Trump | Healthcare Dive).
- Robust Justification Needed: Companies must provide strong evidence, like efficiency gains, to counter competitive concerns, potentially complicating deals.
- Labor and Supplier Focus: Mergers’ impacts on workers and suppliers will be scrutinized, requiring additional analysis and possible remedies.
- More Divestitures: Regulators may demand significant divestitures, increasing transaction costs and complexity.
- Strategic Adjustments: Businesses might adopt cautious strategies, favoring smaller deals to avoid scrutiny, reshaping M&A planning as of March 2025.
This environment demands careful regulatory navigation, impacting corporate strategies significantly.
Impact on Antitrust Policy
The decision also shapes broader antitrust policy:
- Aggressive Enforcement: Continued scrutiny suggests more merger challenges, aligning with Biden-era trends, potentially increasing enforcement actions.
- Court Influence: Though non-binding, guidelines could sway court interpretations, especially if agencies win cases, as noted in policy analyses (Here to Stay? FTC and DOJ Announce that 2023 Merger Guidelines Remain in Effect).
- International Effects: U.S. policy can influence global standards, possibly encouraging stricter merger reviews abroad, given the guidelines’ modern focus.
- Future Precedent: This retention may set a stable policy tone, making future reversals harder and fostering long-term regulatory consistency.
As of March 2025, this move reinforces a commitment to protecting competition, with potential lasting impacts on U.S. and global antitrust frameworks.
Survey Note: Detailed Analysis of Trump Administration’s Retention of 2023 Merger Guidelines
Introduction and Context
As of March 10, 2025, the Trump administration’s decision to retain the 2023 merger guidelines, initially set by the Biden administration, has sparked significant discussion. Announced in February 2025 through memos from FTC Chair Andrew Ferguson and DOJ acting head Omeed Assefi, this move maintains a stricter framework for merger reviews, diverging from expectations of a deregulatory approach typical of Republican administrations. This survey note explores the guidelines’ details, the rationale behind their retention, and their implications for businesses and antitrust policy, drawing on recent reports and analyses.
Detailed Examination of the 2023 Merger Guidelines
The 2023 merger guidelines, released on December 18, 2023, by the DOJ and FTC, are a non-binding set of principles replacing prior versions, including the 2010 Horizontal and 2020 Vertical Merger Guidelines (Antitrust Division | 2023 Merger Guidelines | United States Department of Justice). They aim to address modern market realities, with key changes including:
- Lower Thresholds for Presumptive Illegality: The guidelines lower the Herfindahl-Hirschman Index (HHI) and market share thresholds, making mergers with over 30% market share and significant HHI increases presumptively anticompetitive, as detailed in analyses (DOJ and FTC Release Final 2023 Merger Guidelines Formalizing Aggressive Merger Enforcement Playbook | Insights | Skadden, Arps, Slate, Meagher & Flom LLP).
- Expanded Scrutiny for Vertical and Conglomerate Mergers: They introduce frameworks for assessing vertical mergers’ impacts on competition in adjacent markets and address conglomerate effects, reflecting a broader scope (U.S. Antitrust Agencies Finalize New Merger Guidelines Intended to Reinvigorate Merger Enforcement).
- Consideration of Labor and Supplier Markets: A novel aspect is evaluating mergers’ effects on workers and suppliers, not just consumers, aligning with contemporary economic concerns (The 2023 Merger Guidelines: Law, Fact, and Method | Review of Industrial Organization).
- Direct Evidence of Competitive Effects: The guidelines encourage using direct evidence, such as internal documents or customer feedback, alongside traditional metrics, enhancing enforcement flexibility (Decoding the 2023 FTC and DOJ Merger Guidelines: Insights into Shifting Antitrust Enforcement | Mercatus Center).
These changes mark a shift towards interventionist enforcement, aiming to prevent anticompetitive outcomes in a dynamic economic landscape.

Rationale for Retention by the Trump Administration
The decision to retain these guidelines, announced in February 2025, contrasts with pre-election expectations of a pro-business, less regulatory approach. Several factors likely influenced this choice:
- Stability and Predictability: Ferguson’s memo emphasized the need for stability, noting that frequent changes could undermine agency credibility and business planning (Here to Stay? FTC and DOJ Announce that 2023 Merger Guidelines Remain in Effect). This aligns with historical trends of few revisions since 1992, despite administration changes.
- Bipartisan Consensus on Antitrust Enforcement: Recent analyses suggest growing bipartisan concern over market concentration, particularly in tech, with both parties recognizing the need for robust enforcement (The New Antitrust Consensus – The American Prospect). This consensus may have influenced the decision, reflecting shared policy goals.
- Populist Appeal: The retention aligns with populist sentiments, appealing to voters skeptical of corporate power, as seen in Vice President JD Vance’s alignment with Biden-era FTC Chair Lina Khan’s views (Trump administration keeps Biden merger review guidelines). This resonates with the administration’s broader rhetoric.
- Economic Considerations: Preventing concentrated markets may foster long-term innovation and consumer benefits, a strategic choice for economic health, as noted in policy discussions (The Merger Guidelines Memoranda: An Opening Blunder by the Trump Administration | ITIF).
This decision, made in early 2025, surprises many given Trump’s first-term reputation for leniency, highlighting a nuanced approach to regulation.
Impact on Businesses: Detailed Analysis
The retention of the 2023 guidelines significantly affects businesses, particularly those planning mergers and acquisitions:
- Increased Scrutiny: Companies face more rigorous reviews, especially for horizontal mergers, with lower thresholds for presumptive illegality. Recent healthcare M&A challenges illustrate this, with longer review periods and higher costs (FTC retains stricter merger guidelines under Trump | Healthcare Dive).
- Need for Robust Justification: Merging parties must provide strong evidence, such as efficiency gains or market fragmentation, to counter competitive concerns, potentially complicating deal approvals, as noted in legal analyses (What the New Federal Merger Guidelines Mean for Companies Pursuing Deals | Insights | Skadden, Arps, Slate, Meagher & Flom LLP).
- Focus on Labor and Supplier Impacts: Businesses must assess mergers’ effects on workers and suppliers, requiring additional analysis and possible remedies, reflecting the guidelines’ holistic approach (The 2023 Merger Guidelines: A Critical Assessment | Review of Industrial Organization).
- Potential for More Divestitures: Regulators may demand significant divestitures to address competitive concerns, increasing transaction costs and complexity, as seen in energy sector cases under Biden (Trump Likely to Shift FTC’s Antitrust Stance on Energy Mergers).
- Strategic Planning: Companies might adopt cautious strategies, favoring smaller deals to avoid scrutiny, reshaping M&A planning as of March 2025, with implications for corporate strategy (Antitrust Under Trump: Initial Policies and Actions).
This environment demands careful regulatory navigation, impacting corporate strategies significantly.

Impact on Antitrust Policy: Comprehensive Review
The retention also shapes broader antitrust policy, with several implications:
- Continued Aggressive Enforcement: The guidelines suggest ongoing aggressive merger enforcement, potentially increasing challenges, aligning with Biden-era trends, as noted in recent enforcement updates (Antitrust Division | Market Definition Under The Merger Guidelines: Some Modest Proposals).
- Influence on Court Decisions: Though non-binding, the guidelines could sway court interpretations, especially if agencies win cases, potentially solidifying legal theories, as discussed in policy analyses (Here to Stay? FTC and DOJ Announce that 2023 Merger Guidelines Remain in Effect).
- International Implications: U.S. policy can influence global standards, possibly encouraging stricter merger reviews abroad, given the guidelines’ modern focus, as seen in comparative studies (Antitrust in 2025: Shifting Sands and What to Expect // Cooley // Global Law Firm).
- Future Policy Directions: This retention may set a precedent, making future reversals harder and fostering long-term regulatory consistency, as noted in historical reviews (Merger guidelines – Wikipedia).
As of March 2025, this move reinforces a commitment to protecting competition, with potential lasting impacts on U.S. and global antitrust frameworks.
Comparative Table: 2023 vs. Previous Merger Guidelines
To illustrate the changes, here’s a comparison:
Aspect | 2023 Guidelines | Previous Guidelines (2010/2020) |
---|---|---|
Presumptive Illegality Threshold | >30% market share, significant HHI increase | Higher thresholds, less stringent |
Vertical Merger Scrutiny | Detailed frameworks, broader scope | Limited, focused on specific harms |
Labor/Supplier Impact | Explicit consideration | Minimal focus |
Evidence Used | Direct evidence emphasized | Primarily market concentration metrics |
This table highlights the shift towards a more comprehensive review process.
Conclusion and Forward-Looking Statement
The Trump administration’s retention of the 2023 merger guidelines, as of March 2025, underscores a commitment to stability and competition protection, impacting businesses with increased scrutiny and shaping antitrust policy towards aggressive enforcement. As the regulatory landscape evolves, stakeholders must stay informed, with potential long-term effects on U.S. economic policy and global standards.

FAQ: Trump Administration Retains Merger Guidelines in 2025:
1. What are the 2023 Merger Guidelines retained by the Trump Administration in 2025?
A. The 2023 Merger Guidelines, originally set by the Biden administration, are a set of non-binding principles used by the Federal Trade Commission (FTC) and Department of Justice (DOJ) to evaluate mergers and acquisitions under U.S. antitrust laws. Retained by the Trump administration in February 2025, these guidelines lower the threshold for identifying anticompetitive mergers (e.g., over 30% market share with significant HHI increase), expand scrutiny to vertical and conglomerate mergers, and consider impacts on labor and suppliers. This framework aims to address modern market challenges and prevent monopolistic practices.
2. Why did the Trump Administration decide to keep the 2023 Merger Guidelines in 2025?
A. In February 2025, FTC Chair Andrew Ferguson and DOJ acting head Omeed Assefi announced the retention of the 2023 Merger Guidelines, citing stability and predictability for businesses as key reasons. Despite expectations of deregulation, the decision reflects bipartisan support for stronger antitrust enforcement, populist appeal against corporate power, and a strategic focus on long-term economic health. This move aligns with Vice President JD Vance’s views and contrasts with typical Republican deregulation trends.
3. How do the 2023 Merger Guidelines affect businesses in 2025 under Trump?
A. Businesses face increased scrutiny under the retained 2023 Merger Guidelines in 2025, particularly for mergers exceeding 30% market share or affecting labor and suppliers. This means longer review times, higher costs, and a need for robust justification of mergers’ competitive benefits. Companies may need to propose divestitures or adjust strategies towards smaller deals to avoid regulatory challenges, impacting industries like healthcare, tech, and energy as of March 2025.
4. What changes did the 2023 Merger Guidelines bring compared to previous guidelines?
A. Compared to the 2010 Horizontal and 2020 Vertical Merger Guidelines, the 2023 guidelines lower the threshold for presumptive illegality (e.g., from HHI 2,500 to 1,800), expand scrutiny to vertical and conglomerate mergers, and introduce labor and supplier impact assessments. They emphasize direct evidence (e.g., internal documents) over traditional metrics, marking a shift towards a more interventionist approach to antitrust enforcement, retained by the Trump administration in 2025.
5. How does retaining the 2023 Merger Guidelines impact U.S. antitrust policy in 2025?
A. The retention strengthens U.S. antitrust policy by continuing aggressive merger enforcement, potentially increasing challenges and influencing court decisions, despite the guidelines being non-binding. It may set a precedent for long-term regulatory consistency and could influence global merger review standards. As of March 2025, this decision under Trump suggests a balanced approach, blending populist and stability-focused policies, surprising some analysts expecting a pro-business shift.
6. Are the 2023 Merger Guidelines permanent under the Trump Administration in 2025?
A. No, the 2023 Merger Guidelines are not permanent. While retained in February 2025, FTC Chair Andrew Ferguson noted they could be revised if experience shows a need for adjustments. The Trump administration has emphasized an iterative, transparent revision process, suggesting potential changes could occur later in 2025 or beyond, depending on economic outcomes and political pressures.
7. How are businesses adapting to the 2023 Merger Guidelines in 2025?
A. Businesses in 2025 are adapting by conducting thorough pre-merger analyses to assess market share, labor, and supplier impacts, as required by the retained 2023 guidelines. Many are opting for smaller, less scrutinized deals or preparing detailed justifications and divestiture plans to meet regulatory demands. Industries like healthcare and tech are particularly cautious, adjusting M&A strategies to comply with the stricter framework under Trump’s administration.
9. What industries are most affected by the Trump Administration retaining the 2023 Merger Guidelines?
A. Industries with high consolidation potential, such as healthcare, technology, energy, and finance, are most affected in 2025. Healthcare faces challenges with hospital and insurer mergers, while tech deals, like the blocked HPE-Juniper merger, highlight scrutiny. Energy and financial sectors also see increased review due to market concentration concerns, reflecting the guidelines’ broad scope under Trump’s administration as of March 2025.
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