Conor Meyers — Co-Founder & Business AttorneyHas built and run businesses; advises owners on contracts, transactions, and risk. About Conor →

A merger doesn't just add two businesses together — it fuses their liabilities into one.

A merger combines two companies into a single surviving entity, and unlike some acquisition structures, it generally carries over both businesses’ assets and liabilities by operation of law. That makes structure and preparation especially important: the surviving company inherits what it merges with, known and unknown. Mergers also raise approval, consent, and sometimes antitrust questions that other deals may not. This guide walks through how to structure a merger to minimize the legal and financial risk of combining two businesses into one.

We help businesses get this right from the start. This is general information, not advice on a specific situation.

A merger fuses two businesses’ liabilities into one.

What a merger is and how it differs

A merger legally combines two entities into one surviving company. The Legal Information Institute’s overview of law.cornell.edu describes how the survivor generally succeeds to the other entity’s assets and liabilities by operation of law. That is the defining risk: unlike an asset purchase, where a buyer can leave liabilities behind, a merger tends to carry them over automatically. Understanding this at the outset shapes everything — the structure chosen, the depth of diligence required, and the protections negotiated — because the surviving company will own the combined obligations of both.

The surviving entity inherits what it merges with — known and unknown.

Approvals, consents, and antitrust

Mergers require formal approvals — typically from the boards and owners of both companies — and filings to be legally effective. Existing contracts may contain change-of-control clauses requiring third-party consent, and licenses may need reissuance. Larger combinations can trigger antitrust review; the Federal Trade Commission’s ftc.gov describes premerger notification obligations that certain deals must satisfy before closing. Missing a required approval, consent, or filing can delay or unwind a merger. Mapping these requirements early, and building the timeline around them, is essential to a combination that actually takes effect.

Due diligence on both sides

Because a merger carries over liabilities, thorough due diligence on the other company — and honest assessment of your own — is critical. Each side needs to understand the other’s contracts, liabilities, litigation, licenses, and intellectual property, since all of it becomes the surviving entity’s. Diligence surfaces the problems that should be fixed, priced in, or protected against before the entities combine. In a merger, diligence is not just the acquirer’s task; both companies are marrying their legal histories, and each should know exactly what it is joining before the vows are signed.

Allocating risk in the merger agreement

The merger agreement is where the combined risk gets allocated. Representations and warranties about each company’s condition, indemnification for breaches, closing conditions, and covenants governing conduct before closing all work to protect the parties and the surviving entity. Well-drafted terms ensure that known risks are addressed and that surprises have a predetermined answer. Given that a merger fuses two businesses permanently, the agreement deserves careful negotiation — it is the last point at which risk can be assigned deliberately rather than simply inherited. Legal and tax guidance throughout is strongly advisable.

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