News & Analysis as of

New Legislation Filing Requirements Hart-Scott-Rodino Act

Morgan Lewis

‘Mini-HSR’ Acts Take Effect in Washington and Colorado, with Similar Legislation Pending in Other States

Morgan Lewis on

Colorado and Washington state recently became the first states to adopt their own smaller versions of the Hart-Scott-Rodino Antitrust Improvements (HSR) Act. These “mini-HSR” state laws require certain parties that submit...more

Cozen O'Connor

Washington and Colorado Enact Uniform Premerger Notification Laws: What Businesses Need to Know About The New Era in State AG...

Cozen O'Connor on

As of July 27, Washington State is now the first state to enact a uniform antitrust premerger notification law, and as of August 6, 2025, Colorado will be the second. Both new notification laws are similar, as they are...more

Vinson & Elkins LLP

“Mini-HSR Acts” Multiply in the States; Merger Enforcement Developments in Washington, Colorado and More

Vinson & Elkins LLP on

Parties to transactions should be aware of new requirements for state-level merger reporting – so-called “mini-HSR Acts” – modeled on the Uniform Antitrust Pre-Merger Notification Act (“UAPNA”). Washington and Colorado have...more

Fenwick & West LLP

Washington Becomes First State to Enact ‘Mini HSR’ Notification Requirement

Fenwick & West LLP on

As of July 27, 2025, federal Hart-Scott-Rodino (HSR) Act filings will also need to be submitted to the Washington Attorney General (WA OAG) under Washington State’s Antitrust Premerger Notification Act (APNA) if the parties...more

Hogan Lovells

State premerger notification requirements take effect this summer

Hogan Lovells on

Washington and Colorado recently passed laws that require parties that file premerger filings pursuant to the Hart-Scott-Rodino Antitrust Improvements Act of 1976 (HSR Act) and meet certain state-specific thresholds to...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

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

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

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

McGuireWoods LLP

Washington, Colorado First States to Enact Uniform Antitrust Pre-Merger Notification Act

McGuireWoods LLP on

Washington and Colorado are the first two states to pass laws requiring certain parties to affirmatively submit their Hart-Scott-Rodino (HSR) filings to their states’ attorneys general. Both states passed laws modeled on the...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

Goodwin

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

Goodwin on

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”

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

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

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