ERISA Benefits Law Desk ReferenceERISA Benefits Tech, LLC

Part 25 · Chapter 1

Employee Benefits in Mergers and Acquisitions

Law stated as of October 3, 2026 · Employee Benefits in Mergers and Acquisitions

Scope and status

This chapter is the deal overlay: it supplies the benefits-specific transaction mechanics and points each substantive area (controlled group, COBRA, executive compensation, corrections, fiduciary duties, distributions) to the Part that covers it. Verify PBGC, multiemployer-withdrawal-liability, COBRA, §409A/§280G, EPCRS, and Form 5310-A rules before relying on them.

Citations are to primary authority (Code §§414(a), 414(b)/(c), 410(b)(6)(C), 411(d)(6), 414(l), 401(k); ERISA Title IV / PBGC and the multiemployer withdrawal-liability rules at ERISA §§4201–4225; and transaction-practice consensus). Related questions are treated elsewhere: the controlled-group/§1563 analysis in Part 1 (Controlled Groups and Affiliated Service Groups); the §410(b)(6)(C)/coverage, §401(a)(4) mechanics, and predecessor service in Part 5 (Qualified Plan Testing, Eligibility, and Vesting); full-vesting-on-termination in Part 5 (Qualified Plan Testing, Eligibility, and Vesting) and Part 2 (Plan Documents, Amendments, Mergers, and Terminations); COBRA allocation in Part 13 (COBRA, HIPAA, and Welfare Benefits) (its COBRA continuation-coverage chapter, Part E); §280G/§409A/change-in-control in Part 18 (Nonqualified Deferred Compensation, 409A, 457, and Executive Compensation); target-plan failures in Part 21 (Plan Corrections: EPCRS, VFCP, and DFVCP); and distribution/rollover mechanics in Part 6 (Distributions, Loans, Rollovers, and RMDs).

Sections

Part A is shown in full. The other sections are listed by title; their text is available to subscribers.

Part A — Transaction Structure Drives the Default Benefits Consequences

A1.Stock (share) purchase — the entity and its liabilities travel

Part 25, ch. 1, § A1

In a stock/share purchase, the target entity survives with the same EIN and continues to sponsor its plans; the employees do not terminate. The target (and its plans, assets, and liabilities) moves into the buyer's controlled group, so the buyer's group inherits joint-and-several liability for the target's DB/PBGC underfunding, multiemployer withdrawal liability, and unpaid minimum required contributions and §4971 funding excise taxes (Code §§412(b)(2), 4971(e)(2)). Statute: Code §414(b)/(c); ERISA Title IV; Practitioner consensus.

A2.Asset purchase — liabilities generally stay, employees terminate

Part 25, ch. 1, § A2

In an asset purchase, the buyer acquires selected assets and generally does not assume the seller's liabilities unless it expressly agrees; the seller's employees terminate from the seller and are hired by the buyer (treated as new hires for plan eligibility unless service is credited, C4). Practitioner consensus; Code §1060 (purchase-price allocation). Successor-liability exceptions can override the default — express assumption, de facto merger, mere continuation, fraudulent transfer, and, for ERISA/benefit obligations and multiemployer withdrawal liability, federal common-law successor liability where the buyer had notice and there is substantial continuity of operations. Case law: Circuit — e.g., Einhorn v. M.L. Ruberton, 632 F.3d 89 (3d Cir. 2011); Practitioner consensus.

A3.Merger and spinoff

Part 25, ch. 1, § A3

A statutory merger vests the surviving entity with the disappearing entity's assets and liabilities by operation of law (including its plans). A spinoff/divestiture carves out a business; the benefits analysis depends on whether the carve-out is structured as a stock or asset transaction and whether plans are split under §414(l). Statute: state merger law; Code §414(l).

Part B — Due Diligence

  1. B1Scope and the routing mapSubscribers
  2. B2Common findings and red flagsSubscribers
  3. B3Defined benefit / PBGC diligenceSubscribers
  4. B4Multiemployer plan diligence — withdrawal liabilitySubscribers

Part C — Controlled-Group and Testing Effects of the Deal

  1. C1The controlled-group changeSubscribers
  2. C2HCE determination after the transactionSubscribers
  3. C3The §410(b)(6)(C) coverage transition ruleSubscribers
  4. C4Service crediting across the dealSubscribers
  5. C5Effect on limits and nondiscriminationSubscribers

Part D — Plan Disposition Strategies

  1. D1The disposition menuSubscribers
  2. D2Plan merger (§414(l)) and protected benefitsSubscribers
  3. D3Termination and the §401(k) successor-plan rule (the central constraint)Subscribers
  4. D4Rollovers, freezes, and full vesting on terminationSubscribers

Part E — The Purchase Agreement

  1. E1Representations and warrantiesSubscribers
  2. E2Covenants, closing conditions, and pre-closing actionsSubscribers
  3. E3Indemnities, escrow, and benefits-liability allocationSubscribers
  4. E4Service credit, transition, and successor payrollSubscribers

Part F — Closing and Post-Closing Actions

  1. F1Closing checklistSubscribers
  2. F2Post-closing integrationSubscribers
  3. F3Executive compensation at and after closingSubscribers

The first Part of each chapter is open to everyone. The remaining sections, with their authority and practice points, are available to subscribers and to clients of ERISA Benefits Law Group, PLLC whose engagement includes access.

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