You take the case, order the product, and pull the corporate records, only to find that the entity stamped on the nameplate stopped filing three years ago. Its assets went to a buyer that kept the brand, the plant, and half the sales force. Your client is hurt today; the manufacturer of record is a shell. Whether you recover anything turns on successor liability, and on how carefully you traced the deal before you named a defendant.
The default rule, and why it exists
The traditional rule is blunt: a corporation that buys another company's assets does not inherit the seller's tort liabilities. A stock purchase or a statutory merger carries the debts forward, but a clean asset sale does not. The buyer takes the equipment and the customer list and leaves the liabilities behind with the selling shell, which then distributes its cash and dissolves. Courts built this rule to keep asset markets liquid, so that a buyer can price what it is acquiring without pricing an open-ended stream of future injury claims it cannot see.
For an injured plaintiff, that logic is cold comfort. The seller is judgment-proof, the product is still in the field, and the entity now profiting from the same product line owes nothing under the general rule. That is why the exceptions matter, and why successor liability product liability practice is largely a fight over which exception fits the paperwork.
The four classic exceptions
Nearly every jurisdiction recognizes four escapes from the no-liability default. They are the first thing to plead and the first thing to test in discovery:
- Express or implied assumption of liabilities. The asset-purchase agreement itself may assume the seller's obligations. Read the assumed-liabilities schedule and the excluded-liabilities schedule word for word. Even where tort claims are expressly excluded, conduct after closing can imply assumption, such as the buyer honoring warranty and recall obligations on the seller's older units.
- De facto merger. When a transaction is structured as an asset sale but functions as a merger, courts collapse the form. The classic markers are continuity of ownership (seller shareholders become buyer shareholders), continuity of management and operations, the seller's prompt dissolution, and the buyer assuming the liabilities needed to run the business uninterrupted.
- Mere continuation. Related but distinct, this asks whether only one corporation remains after the dust settles, with the same directors, officers, and ownership, so the buyer is really the seller wearing a new name.
- Fraudulent transfer to escape debts. Where the deal was structured to strip assets away from creditors, including future tort claimants, the transfer can be unwound. Watch for inadequate consideration, insider dealing, and a dissolution timed to outrun known claims.
Assumption and fraudulent transfer are fact questions you win with documents. De facto merger and mere continuation overlap heavily, and many courts treat them as two labels for the same continuity inquiry, so plead both and let the record sort them out.
The product-line exception and the state split
A minority of states go further with a doctrine built specifically for products cases. Under the product-line exception, a company that acquires a manufacturer's assets and continues to make the same product line assumes strict liability for defects in units the predecessor sold, even absent continuity of ownership. California's Supreme Court is usually credited as the origin of the doctrine in Ray v. Alad Corp. The rationale is that the successor benefits from the predecessor's goodwill and trade, has spread-the-risk capacity the plaintiff lacks, and by continuing the line effectively destroyed the plaintiff's remedy against the original maker.
A related theory, continuity of enterprise, relaxes the de facto merger test by dropping the strict continuity-of-ownership requirement and asking instead whether the business enterprise carried on largely intact.
The catch is that these theories are a minority position, and the split is sharp. Some states have adopted the product-line exception, others have squarely rejected it as unworkable and inconsistent with settled corporate law, and many have never reached it. Do not assume it travels. Nail down your forum's choice-of-law analysis early, because whether the acquiring entity is exposed at all can turn on which state's successor-liability rule governs.
Tracing the deal to find the right defendant
Successor theories live or die on corporate archaeology. Start with the secretary of state filings in the state of incorporation and the state of operation: articles, amendments, mergers, and the dissolution certificate with its date. Pull the asset-purchase agreement, the bill of sale, and every schedule, ideally through the acquiring entity in discovery once you have a hook, but often earlier through UCC filings, recorded security interests, and SEC disclosures if a public company touched the deal.
What the documents have to show you
Map the money and the people. Who signed for each side, who the shareholders were before and after, where the purchase price went, and whether the seller had enough left to pay creditors. Chase the continuity signals a factfinder cares about: same plant, same product codes, same key employees, same 800 number, same brand held out to the public. Then plead each theory the facts support in the alternative, and tie the specific documents to the specific elements rather than reciting the doctrine in the abstract. For the strategic overlap between these theories and the underlying defect proof, our coverage of product liability litigation and of notable case law and settlements is worth a second pass before you draft the complaint.
The Section 363 wrinkle
Bankruptcy changes the math. When a distressed manufacturer sells assets under Section 363 of the Bankruptcy Code, the sale order typically declares the transfer free and clear of interests, and buyers argue that language wipes out successor liability for pre-sale product claims. Courts are split on how far a free-and-clear order reaches, especially against future claimants who had no injury and no notice at the time of sale and therefore no opportunity to object. Some sale orders carve out successor liability expressly, or a court refuses to bar claims by plaintiffs who could not have been identified. Read the actual sale order and the notice that went out, not just the buyer's characterization of it. A due-process gap in how future claimants were noticed is frequently the opening.
None of this is a substitute for a live seller. But when the manufacturer of record has dissolved, merged, or gone through a 363 sale, the recovery is usually still there if you find the successor and match the paperwork to a theory the forum recognizes. For overlapping fatal-injury claims, coordinate the successor analysis with the wrongful death pleading so the same corporate proof does double duty.