What is the difference between an asset sale and a stock sale in M&A?

Question

AcadiFi · Accepted Answer

ASSET SALE: buyer purchases specific assets and assumes specific liabilities of the target. Target entity remains with the seller.

STOCK SALE: buyer purchases shares of target, acquiring the entire legal entity including all assets, liabilities, and contracts.

KEY DIFFERENCES:

Tax treatment:
- Asset sale: buyer gets step-up in basis of acquired assets (higher depreciation going forward, tax-advantaged). Seller pays TAX TWICE — once at corporate level on asset gains, again at shareholder level on distribution. Hence sellers hate asset sales.
- Stock sale: buyer inherits existing tax basis (no step-up). Seller pays tax ONCE on capital gain. Sellers prefer stock sales.

```mermaid
graph TD
    A[M&A Deal] --> B[Asset Sale]
    A --> C[Stock Sale]
    B --> D[Buyer: Step-up Basis]
    B --> E[Seller: Double Tax]
    C --> F[Buyer: Carryover Basis]
    C --> G[Seller: Single Tax]
```

Liability transfer:
- Asset sale: buyer picks and chooses which liabilities to assume (environmental, litigation, etc. can be left with seller)
- Stock sale: buyer inherits ALL liabilities including unknown/contingent ones

Contract assignability:
- Asset sale: contracts often need third-party consent to assign (complex)
- Stock sale: contracts transfer automatically with the entity (simpler)

NEGOTIATION: This tax asymmetry leads to price compromise. Buyers often offer HIGHER prices for stock sales to compensate sellers for the inferior tax treatment buyers face.

At Cobalt Industrial Holdings, a divestiture to rival Terrace Partners was structured as an asset sale with a 6% price reduction reflecting the tax allocation. The 338(h)(10) election in the US provides a hybrid — stock purchase treated as asset purchase for tax.

What is the difference between an asset sale and a stock sale in M&A?

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