The two ways to buy a business - buying what it owns or buying the entity that owns it - and why the choice decides which liabilities come with it, which contracts transfer, and how the price is taxed.
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A business changes hands in one of two ways. In an asset purchase the buyer acquires specific things the business owns - equipment, inventory, contracts, intellectual property, goodwill, a lease - and leaves the selling entity in the seller's hands, along with any liabilities the buyer did not expressly assume. In a stock purchase (or, for an LLC, a membership interest purchase) the buyer acquires the entity itself, and everything the entity owns and owes comes with it, known and unknown. Buyers therefore generally prefer assets and sellers generally prefer stock, and much of the negotiation is about which side's preference wins and at what price.
The differences are practical. In an asset deal each contract, license and permit must be transferred, and many cannot be assigned without the other party's consent; employees are terminated and rehired; and the buyer usually gets a stepped-up tax basis in what it bought while the seller may face two levels of tax if it is a corporation. In a stock deal the entity's contracts, licenses and employment relationships continue undisturbed, and the seller typically receives capital-gain treatment, but the buyer inherits every liability, which is why stock deals carry heavier representations, warranties, indemnities and escrows.
An asset deal does not always leave liabilities behind. Under successor liability doctrines a buyer of assets can be held responsible for the seller's obligations where it expressly or impliedly assumed them, where the transaction was in substance a merger, where the buyer is a mere continuation of the seller, or where the deal was structured to escape creditors; some states add product-line and environmental variants. Unpaid state taxes commonly follow the assets unless a tax clearance is obtained before closing.
The structure question should be put to a lawyer and a tax adviser together before a letter of intent is signed, because it is decided there and is expensive to reopen. A buyer of assets should ask specifically which contracts need consent to transfer and which state liabilities follow the assets; a seller of stock should expect the buyer to demand indemnities and a holdback and should understand exactly what those cover and for how long.
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Other entries in the same area of law, each written from the same primary sources.