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Antitrust Provisions State Attorneys General Mergers

Snell & Wilmer

Washington and Colorado Enact Groundbreaking State-Level Merger Notification Requirements, With Other States Likely To Follow

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Washington was the first state to adopt the Uniform Antitrust Pre-Merger Notification Act. Signed into law in April 2025 and effective as of July 27, 2025, the Washington law establishes new premerger filing requirements for...more

Paul Hastings LLP

New Mini-HSR Laws Take Effect This Summer

Paul Hastings LLP on

Starting Sunday, July 27, 2025, any party to an M&A transaction that triggers a federal Hart-Scott-Rodino (HSR) Act filing must also submit a copy to the Washington attorney general if the filing party (1) maintains a...more

Stevens & Lee

Pennsylvania House Bill Takes Aim at Private Equity in Health Care

Stevens & Lee on

Both the CentePending legislation in the Pennsylvania General Assembly seeks to limit the impact of private equity on health care in Pennsylvania. House Bill 1460, titled the “Health System Protection Act,” passed with...more

Mintz

I Heart FTC: Proposed New York Bill Would Continue Biden FTC’s Antitrust Vision and Policies [Updated on July 16, 2025]

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After the FTC issued a replacement of the 2016 Antitrust Guidance for Human Resource Professionals on January 16, 2025, Commissioner – now Chair – Andrew N. Ferguson, joined by Commissioner Melissa Holyoak, punctuated his...more

BakerHostetler

State-Level Merger Scrutiny Grows: Washington, Colorado Lead Expansion of State Premerger Notification Laws

BakerHostetler on

Earlier this year, Washington state enacted a version of the nascent Uniform Antitrust Pre-Merger Notification Act (the Uniform Act), which is slated to take effect on July 27....more

Miles & Stockbridge P.C.

Washington State Enacts First Uniform Antitrust Premerger Notification Act

On April 4, Washington became the first state to enact the Uniform Antitrust Premerger Notification Act (APNA). Under the APNA, a person making a Hart-Scott-Rodino (HSR) filing on or after July 27, 2025 must provide a copy of...more

Vinson & Elkins LLP

Colorado Shifts to Robust State-Level Antitrust Enforcement Regime

Vinson & Elkins LLP on

Colorado’s antitrust landscape is undergoing a fundamental transformation — not just because of the sweeping legislative changes enacted in 2023, but also due to the assertive approach now being taken by the Colorado Attorney...more

Stinson LLP

Colorado Joins the "Baby" HSR Trend

Stinson LLP on

State attorneys general (AGs) have a legal right to challenge anticompetitive mergers, both under the federal Clayton Act and their own state antitrust laws. And in recent years, state AGs have played increasingly larger...more

K&L Gates LLP

Colorado Enacts Uniform Antitrust Pre-Merger Notification Law

K&L Gates LLP on

On 4 June 2025, Colorado became the second state—following the state of Washington—to enact a broad, state-level, industry-agnostic premerger notification regime. Under Colorado’s new law, any party that submits a filing...more

Bass, Berry & Sims PLC

Colorado Enacts "Mini-HSR" Law, Joining Growing State-Level Premerger Filing Trend

On June 4, Colorado became the second state to adopt the Uniform Antitrust Premerger Notification Act (Act) when Governor Jared Polis signed SB25-126 into law. Like Washington’s version of the Act, Colorado’s new law imposes...more

Axinn, Veltrop & Harkrider LLP

State by State, Pre-Merger Notifications Expand

In the wake of the recent major revisions to the federal merger review form, states are also getting into the act, creating broad new transaction notification requirements. Such notification requirements are not completely...more

WilmerHale

Healthcare & Antitrust: What to Expect in the New Trump Administration

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Antitrust scrutiny of healthcare markets is nothing new. The Biden Administration and first Trump Administration focused antitrust enforcement efforts across the healthcare and life sciences industries. The newly installed...more

Vinson & Elkins LLP

California’s 2025 Abuse of Dominance Proposal: Redefining State-Level Antitrust Enforcement In The Fourth-Largest Economy on Earth

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For decades, California enforcers and politicians have argued for state-level antitrust enforcement activity at a level commensurate with California’s $4.1 trillion economy, the largest state economy in the United States....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

Paul Hastings LLP

Check-Up and Diagnosis: The Ongoing Scrutiny of Private Equity Healthcare Investments

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In 2024 alone, over 676 private equity firms and related investors acquired healthcare companies or related assets. The growing influence of private equity in the healthcare industry has not gone unnoticed on either of the...more

Latham & Watkins LLP

Washington Introduces State-Level Merger Notification Rules

Latham & Watkins LLP on

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

McDermott Will & Emery

Washington State Enacts Merger Review Regime

McDermott Will & Emery on

Washington is the first state to enact the Uniform Antitrust Premerger Notification Act, which requires merging parties that submit a federal filing under the Hart-Scott-Rodino (HSR) Act (15 U.S.C. Sec. 18(a)) to also submit...more

Bass, Berry & Sims PLC

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

Bass, Berry & Sims PLC on

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

Mintz - Health Care Viewpoints

Health Law Diagnosed – Health Care Transaction Review Laws and the New Normal

In the latest episode of Health Law Diagnosed, host Bridgette Keller discusses the evolving legislative and regulatory landscape impacting health care transactions, particularly for private equities and hedge funds...more

Sheppard Mullin Richter & Hampton LLP

State Antitrust Enforcement Roundup: New Laws; New Potential Legislation; and New (and Broader) Areas of Focus

The number of U.S. states implementing or considering new antitrust laws (or supplementing existing laws) targeting proposed transactions continues to grow. As detailed in our healthcare merger matrix, many states have...more

White & Case LLP

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

White & Case LLP on

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

WilmerHale

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

WilmerHale on

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

Stinson LLP

Washington State First to Adopt "Baby HSR" Act

Stinson LLP on

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

Wilson Sonsini Goodrich & Rosati

States Expand Premerger Filings Family by Adopting “Baby-HSR” Laws to Review More Transactions

In a growing trend, states are requiring more premerger filings by enacting “baby-HSR” laws modeled after the federal Hart-Scott-Rodino (HSR) Act. These state-level statutes require parties to certain mergers and acquisitions...more

McDermott Will & Emery

Heard at the 2025 Antitrust Law Section Spring Meeting

The American Bar Association Antitrust Law Section’s annual Spring Meeting took place from April 2 to 5 in Washington, DC. The Spring Meeting features updates from federal, state, and international antitrust enforcers and...more

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