Successorship and the Obligation to Bargain
Buying assets does not buy a labor agreement. It can nevertheless buy a bargaining partner, and a buyer that says the wrong thing during hiring can find it has bought the obligation to bargain before it sets a single wage rate.
The rule in short
A buyer becomes a successor where there is substantial continuity in the business and a majority of its employees in an appropriate unit came from the predecessor. A successor must recognize and bargain with the incumbent representative but is not bound by the predecessor's agreement and may generally set initial terms. That freedom is lost where the buyer has made retention perfectly clear.
A buyer of assets acquires equipment, contracts and goodwill. It does not acquire the seller's collective bargaining agreement. What it may acquire, without ever signing anything, is a duty to recognize and bargain with the union that represented the seller's employees. The two propositions are easy to state and constantly confused, and the confusion is expensive because the duty attaches by operation of law at a moment the buyer chooses without realizing it.
The two questions that decide it
Successorship requires substantial continuity in the enterprise and a workforce drawn in majority from the predecessor. Continuity is assessed from the perspective of the employees: whether the business is essentially the same, whether they are doing the same jobs in the same working conditions under the same supervisors, whether the same plant and equipment are used, whether the production process is unchanged, and whether the same product or service reaches the same customers.
A hiatus between the seller's shutdown and the buyer's startup weighs against continuity but does not defeat it. Neither does a change of name, a change of management above the supervisory level, or a reorganization of shifts. What defeats it is a genuinely different operation.
Counting, and when to count
The second question is arithmetic applied to an appropriate unit. If a majority of the buyer's employees in that unit are former employees of the predecessor, the union's majority status is presumed to continue and the buyer must bargain on demand. The unit used is the one that would be appropriate for the buyer's operation, so a reorganization that genuinely merges two groups can change the denominator, which is why the community of interest analysis that fixes a unit does real work in a successorship case.
Timing is decided by the substantial and representative complement rule. The count is taken when the buyer has hired enough of its intended workforce, across enough classifications, for the sample to be meaningful. A demand made before that point is not defeated by being early; it is treated as continuing until the threshold arrives.
A buyer is free to hire whomever it wants, and free to hire nobody from the seller. It is not free to decline to hire the seller's employees because they were represented, or in order to keep the majority below the line. Discriminatory refusal to hire is a violation in its own right, and the remedy commonly includes hiring, back pay, and an order to bargain calculated on the workforce the buyer would have had. Hiring records, interview notes and internal messages about the union decide these cases.
Setting initial terms, and the exception that removes the right
A successor ordinarily sets its own initial terms and conditions of employment unilaterally, then bargains from there. The reasoning is that a buyer must be able to price the labor component before it knows whether it will have a bargaining obligation at all. The consequence is that the first wage rates, benefits and work rules are the buyer's to write.
The exception is the perfectly clear successor. Where the buyer has made it perfectly clear that it intends to retain all of the predecessor's employees, and has not announced that it will do so on different terms, it forfeits the right to set terms unilaterally and must consult the union first. The trap is entirely verbal: an announcement inviting employees to keep working with no mention of changes can create the obligation, while the same announcement paired with a statement that terms will be established by the buyer preserves it. Once bargaining begins, everything runs on the ordinary good faith standard and the law of impasse.
Four transactions and what each carries
| Transaction | Must recognize the union | Bound by the contract | May set initial terms | Inherits pending liability |
|---|---|---|---|---|
| Stock purchase | Yes; the employer never changed | Yes | No | Yes |
| Asset purchase, majority hired from seller | Yes | No | Yes | Only with notice of the pending case |
| Perfectly clear successor | Yes | No | No; must consult first | Only with notice of the pending case |
| Asset purchase, few hired from seller | No | No | Yes | Only with notice of the pending case |
| Alter ego | Yes | Yes | No | Yes |
Alter egos, and liabilities that follow the business
An alter ego is not a successor at all. It is the same employer wearing a different name, identified by substantially identical ownership, management, business purpose, operations, equipment, customers and supervision, often accompanied by an intent to escape obligations under the Act. An alter ego is bound by the existing collective bargaining agreement in full, including its wage scales and its union security and checkoff provisions, because there was never a new employer to be free of it.
Separately, a genuine successor that buys with notice of a pending unfair labor practice proceeding against the seller can be ordered to satisfy the remedy, including reinstatement and back pay, on the reasoning that the affected employees would otherwise lose everything in a transaction they had no part in. That makes labor due diligence a documentary exercise: pending charges, open grievances, arbitration awards not yet complied with, and the seller's own bargaining history all belong in the file, alongside the separate obligations a buyer takes on for employment verification records inherited from the seller, which run on their own rules and are not discharged by anything in a labor settlement.
Points to carry away
- Successorship turns on substantial continuity of the business and the composition of the new workforce.
- A successor must bargain when a majority of its unit employees came from the predecessor.
- A successor is generally not bound by the predecessor's collective bargaining agreement.
- A buyer that has made retention perfectly clear must consult before setting initial terms.
- Refusing to hire the predecessor's employees to avoid the obligation is unlawful discrimination.
- An alter ego is a disguised continuation of the same employer and is bound by the existing contract.
Questions readers ask
When exactly is the workforce counted?
At the point the buyer has employed a substantial and representative complement of the workforce it intends to have. That avoids both counting too early, when a handful of startup employees would distort the picture, and counting too late, when turnover could erase the predecessor's employees. Courts look at whether the job classifications designated for the operation are filled, whether normal production is under way, and the size of the complement against the expected full workforce. A union's demand for recognition made too early is treated as continuing until the threshold is reached.
Does a stock purchase raise successorship questions?
No. Buying the shares of a company leaves the employing entity intact, so there is no new employer and no successorship analysis. The corporation remains bound by its own collective bargaining agreement, its bargaining obligation continues without interruption, and pending grievances and unfair labor practice cases follow the entity rather than the owner. Successorship doctrine exists for asset transactions, where a different legal entity begins employing people to do work the seller used to do.
Can a successor refuse to arbitrate a grievance from before the sale?
Usually yes, and the answer follows from not being bound by the contract. Where the predecessor's arbitration clause has not been assumed, a successor cannot be compelled to arbitrate under it. Courts have ordered arbitration in transactions where the predecessor was absorbed and the workforce and operation continued essentially unchanged, treating the obligation as surviving the merger. The distinction rests on how complete the continuity is, and it is one of the least predictable areas in this field.
Sources
- Cornell Legal Information Institute — 29 U.S.C. 158, Unfair labor practicesThe refusal-to-bargain and discrimination provisions applied to a successor and its hiring.
- Cornell Legal Information Institute — 29 U.S.C. 159, Representatives and electionsExclusive representation and unit determination, which frame the successorship count.
- Cornell Legal Information Institute — 29 U.S.C. 185, Suits by and against labor organizationsThe jurisdiction under which a suit to compel a successor to arbitrate is brought.
- Cornell Legal Information Institute — 29 U.S.C. 160, Prevention of unfair labor practicesThe remedial authority that can reach a buyer with notice of a pending case.
- eCFR — 29 CFR Part 102, Rules and Regulations, Series 8Procedure for the refusal-to-bargain charge that ordinarily tests successor status.
- National Labor Relations Board — National Labor Relations ActThe statutory text as the agency publishes it, section by section.
Lawwise is a publication, not a law firm. This article states general rules and cites its sources; it is not advice about any particular case, and the law differs by state and changes over time.
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