Structuring Corporate Acquisitions Under U.S. Law

When one company buys another in the United States, the deal does not just happen. It gets structured. The way an acquisition is structured determines tax treatment, liability exposure, regulatory hurdles, and how long the whole process takes. 

Get it right, and the deal closes cleanly. Get it wrong, and you are looking at unexpected liabilities, IRS complications, or a failed transaction. This is why it is important to get the help of an experienced corporate law attorney. 

The Three Main Structures for Corporate Acquisitions. 

Most U.S. acquisitions fall into one of three categories: 

Each structure has real consequences. In an asset purchase, for example, a buyer can leave behind pension liabilities or ongoing litigation. In a stock purchase, those come along for the ride whether the buyer wants them or not. 

Asset Purchases Give Buyers More Control Over Liability. 

In an asset deal, the buyer selects which assets and liabilities to acquire. This is particularly attractive when the target company carries unknown or contingent liabilities like pending lawsuits, environmental claims, or tax disputes. 

That said, asset purchases come with their own friction, such as: 

• Contracts and licenses often require third-party consent to transfer.
• Employees technically need to be rehired.
• The process can be administratively heavier than a stock deal.

For buyers acquiring a division of a larger company, rather than the whole business, an asset purchase is often the only viable path. 

Stock Purchases Are Simpler Than Asset Purchases but Carry More Risk. 

A stock purchase is cleaner on paper. The buyer acquires the target’s shares, and the company continues operating as-is. No need to re-title assets or renegotiate contracts. The trade-off is liability. 

Everything the company owns and owes transfers to the buyer. This includes liabilities that may not appear on the balance sheet. Thorough due diligence is non-negotiable in any stock deal. 

Representations and Warranties Insurance Has Grown Significantly. 

To manage this risk, most buyers now require extensive rep and warranty coverage. 

The representations and warranties (R&W) insurance market in the U.S. has expanded sharply, with R&W insurance being used in over 50% of U.S. private M&A deals above $25 million in 2023, according to AIG’s transaction liability report. 

Mergers Require More Process but Offer Clean Integration. 

In a statutory merger, the target company merges into the acquirer and ceases to exist as a separate legal entity. 

This structure works well for large, publicly traded acquisitions where shareholder approval is required anyway. Key steps typically include: 

• Board approval from both companies. 
• Shareholder vote (often a majority or supermajority). 
• Regulatory filings, including Hart-Scott-Rodino (HSR) antitrust review for larger deals. 

Regulatory Review Can Slow or Block a Deal. 

The HSR Act requires parties to notify the FTC and DOJ before closing transactions above a certain threshold. In 2024, that threshold was $119.5 million. Deals above this level enter a mandatory waiting period (typically 30 days) before they can close. 

Antitrust scrutiny has intensified. The FTC challenged or investigated a record number of deals in 2023, and merger enforcement actions increased by 42% compared to the prior five-year average, per FTC annual data. 

Tax Treatment Plays a Major Role in Deal Structuring. 

Federal tax treatment hinges on structure. Taxable deals trigger immediate gain recognition for the seller, while tax-free reorganizations under IRC Section 368 let sellers defer taxes by receiving acquirer stock instead of cash. 

Buyers typically favor asset purchases for the stepped-up tax basis. Sellers lean toward stock deals for capital gains treatment. This disagreement is one of the most negotiated points in any U.S. acquisition and often the last thing resolved before signing.