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Hart-Scott-Rodino Act

The Hart-Scott Rodino Antitrust Improvements Act is a United States federal statute enacted in 1976 establishing the federal premerger notification program. Under the Act, parties contemplating mergers or... more +
The Hart-Scott Rodino Antitrust Improvements Act is a United States federal statute enacted in 1976 establishing the federal premerger notification program. Under the Act, parties contemplating mergers or acquisitions must notify the Department of Justice and the Federal Trade Commission prior to completing the transaction. Once notified, the DOJ and FTC investigate and make a determination as to whether the proposed transaction will adversely impact U.S. commerce and competition within the market. less -
Lighthouse

AI’s Expanding Role in Antitrust: How LLMs Are Changing Regulatory Reviews

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Learn how strategically deploying large language models in both predictive and generative AI can help streamline your processes in an increasingly complex regulatory environment....more

Akin Gump Strauss Hauer & Feld LLP

The First 100 Days of the New HSR Rules: Assessing the Impact

The new Hart-Scott-Rodino (HSR) requirements went into effect on February 10, 2025, meaning that May 21, 2025 marked their 100th day in effect. Here are just a few of our observations from the first 100 days of the new HSR...more

Troutman Pepper Locke

Embattled Biotechs Facing Uncertainty at the FDA Look to Collaborative Deal Structures

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Biotechs have faced several challenging years with slumping valuations and a competitive funding environment. However, the latest slew of retirements and layoffs at the FDA could present their greatest challenge yet....more

Vinson & Elkins LLP

First 100 Days of the New HSR Rules

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One hundred days ago, sweeping revisions to the Hart-Scott-Rodino Act Premerger Notification Form took effect. The revisions have significantly increased the time and effort to prepare HSR filings and have led filing parties...more

Akerman LLP

Preparing for an HSR Filing in the Ordinary Course of Business

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Earlier this year, the Federal Trade Commission (FTC), with concurrence from the Antitrust Division of the Department of Justice (DOJ), issued a Final Rule implementing substantial changes to the pre-merger notification...more

Goodwin

Antitrust & Competition Healthcare Quarterly Update Q1 2025

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While M&A activity has slowed in the tail end of the first quarter of 2025, including in healthcare, there have been several noteworthy developments in the antitrust space in the first 100 days of the Trump Administration. ...more

EDRM - Electronic Discovery Reference Model

April 2025 HSR Rebound: Regulatory Shifts, Tariff Tensions, and M&A Impacts

Background Note: The Hart-Scott-Rodino (HSR) Act established the Premerger Notification Program, requiring certain mergers and acquisitions to be reported to the Federal Trade Commission (FTC) and the Department of Justice...more

HaystackID

April 2025 HSR Rebound: Regulatory Shifts, Tariff Tensions, and M&A Impacts

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April 2025 marked a period of measured recovery in Hart-Scott-Rodino (HSR) reportable transactions, following a notable decline in March. This rebound unfolded against a backdrop of significant regulatory change and the...more

Cadwalader, Wickersham & Taft LLP

Washington State Adopts First Broad State Antitrust Premerger Notification Act and Filing Requirement

Effective July 27, 2025, any person that files a Hart-Scott-Rodino (HSR) Act Notification and Report Form (HSR Form) with the Federal Trade Commission (FTC) and the Department of Justice (DOJ) must also submit an electronic...more

Jenner & Block

Jenner & Block Japan Newsletter - April 2025

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Welcome to the April 2025 edition of the Jenner & Block Japan Newsletter, a publication containing updates about legal developments in the United States that may be noteworthy to our clients and other leaders in the Japanese...more

Skadden, Arps, Slate, Meagher & Flom LLP

Antitrust Enforcers Will Take a Friendlier Approach to Mergers but Retain Biden-Era Guidelines and HSR Rules - The Trump...

The government’s new antitrust leaders have signaled a less skeptical stance on mergers but a continued focus on enforcement, especially in Big Tech and the health care and agriculture sectors....more

Frost Brown Todd

Antitrust Developments Update for April 2025

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In our last antitrust developments publication, we commented on the challenge to the new Hart-Scott-Rodino Antitrust Improvements Act (HSR Act) final rule brought by the U.S. Chamber of Commerce and other parties in the...more

Latham & Watkins LLP

Washington Introduces State-Level Merger Notification Rules

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States’ merger review and enforcement initiatives continue to expand as Washington adopts the nation’s first “mini-HSR” rule. On April 4, 2025, the State of Washington passed the Antitrust Premerger Notification Act...more

Bass, Berry & Sims PLC

Washington Enacts “Mini-HSR” Law, Expanding State-Level Premerger Filing Requirements

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On April 4, Washington became the first state to adopt the Uniform Premerger Notification Act (Act) when Washington Governor Jay Inslee signed the bill into law. The new statute imposes state-level premerger filing...more

Goodwin

Washington Becomes First State to Adopt Filing Requirements for HSR-Reportable Transactions Outside of Healthcare

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On April 4, 2025, Washington became the first state to enact a law requiring a general pre-merger notification of HSR-reportable deals to state enforcers, regardless of industry....more

White & Case LLP

Washington Becomes First State to Enact “Uniform Antitrust Pre-Merger Notification Act”

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On April 4, 2025, Gov. Bob Ferguson of Washington state signed S.B. 5122, making Washington the first state to enact the Uniform Law Commission’s “Uniform Antitrust Pre-Merger Notification Act.” Overview of the New...more

McCarter & English, LLP

Mo’ Data, Mo’ Problems: Antitrust Risk in the Age of Big Data

New Hart-Scott-Rodino premerger notification rules, which took effect in February, require that companies now provide more information than ever before about their prospective mergers. Meanwhile, both federal and state...more

WilmerHale

Washington Enacts Broad Premerger Notification Law: The Cutting Edge of State Merger Review

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On April 4, 2025, Washington became the first state to enact the Uniform Antitrust Premerger Notification Act (Model Act), requiring parties to certain notifiable transactions under the Hart-Scott-Rodino Antitrust...more

Jenner & Block

Premerger Enforcement Actions Highlight Importance of HSR Compliance

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Cases involving premerger enforcements under the Hart-Scott-Rodino (HSR) Act are relatively rare. So far in 2025, however, we have seen two such cases involving potentially record-breaking penalties. The timing is notable, as...more

Seyfarth Shaw LLP

Federal Trade Commission Antitrust Roundup: Trump Administration Off to An Aggressive Start

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Last week, on April 10, 2025, the U.S. Senate confirmed Mark Meador as the FTC’s third Republican commissioner.  Meador joins Chairman Ferguson and Commissioner Melissa Holyoak on what is now a three commissioner panel (all...more

Stinson LLP

Washington State First to Adopt "Baby HSR" Act

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Legislatures in several states have recently introduced bills that would require certain parties who submit Hart-Scott-Rodino (HSR) premerger filings to the federal government to provide that same information to the state. On...more

McDermott Will & Emery

Antitrust Under Trump: April 2025 Updates

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As the Trump administration’s antitrust landscape continues to develop, companies should stay alert to key changes in merger filing requirements, remedy expectations, agency personnel, and more. Signs indicate we are entering...more

EDRM - Electronic Discovery Reference Model

HSR Filings Fall Sharply in March 2025, Lowest Monthly Total Since Early Pandemic

ComplexDiscovery Editor’s Note: The March 2025 Hart-Scott-Rodino (HSR) filings dropped to 89 transactions, marking the lowest monthly total since the early months of the COVID-19 pandemic in April and May 2020. This...more

HaystackID

March 2025 HSR Filings Hit Five-Year Low Amid Regulatory Overhaul and Legal Challenge

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The federal premerger notification program administered under the Hart-Scott-Rodino (HSR) Act recorded just 89 transactions in March 2025, marking the lowest monthly filing total in nearly five years. This downturn is the...more

Axinn, Veltrop & Harkrider LLP

Axinn Associates at the Antitrust Spring Meeting - Antitrust under Trump: Redo of the first term, or something new?

The Spring Meeting is the largest gathering of competition, consumer protection, and data privacy profes­sionals globally, with lawyers, academics, economists, enforcers, journalists, and students from around the world....more

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