When two companies merge, one company legally absorbs the other, and the surviving entity inherits every asset, debt, contract, employee, and lawsuit of the company that disappears. The transfer happens automatically by operation of law the moment the merger takes effect, not through a series of separate sales or assignments. Before that moment, the companies have to clear antitrust review, make securities filings, get shareholder approval, and work through the tax consequences of the deal structure.
Here is what actually changes, and for whom.
One Legal Entity Replaces Two
In a statutory merger, the survivor keeps its corporate existence and the target ceases to exist as a separate legal person. The target is not liquidated. Nothing is sold off. Its separate legal personality simply ends, and everything it owned or owed flows into the survivor.
A consolidation works slightly differently: both original companies dissolve, and a brand-new third entity emerges in their place. Either way, one corporation stands where two used to be.
The transaction becomes official when the companies file a certificate or articles of merger with their state’s filing office. State filing fees generally range from $25 to $300. Once the filing is processed, the target’s corporate charter is canceled, and the survivor becomes the sole entity responsible for governance and regulatory compliance going forward.
Assets, Debts, and Contracts Transfer Automatically
At the moment the merger takes effect, every asset and every liability of the disappearing company vests in the survivor. State corporate codes make this automatic, so the survivor does not need individual deeds, bills of sale, or assignment agreements for each piece of equipment, real estate parcel, bank account, patent, trademark, or copyright the target held.
The same automatic transfer applies to debts and obligations. If the target owed money to a lender or had a lien on its machinery, the survivor becomes the primary debtor. Creditors keep their security interests intact; the law treats the survivor as if it had originally incurred those obligations.
Existing contracts with vendors, clients, landlords, and other business partners also carry over. The survivor steps into the shoes of the disappearing entity, inheriting both the benefits and the burdens of every agreement. A standard anti-assignment clause that prohibits assignment without the other party’s consent generally does not block a transfer that happens through a statutory merger, because courts in most states treat the merger as a succession of rights rather than a voluntary assignment. Contracts that specifically prohibit transfer “by merger” or “by operation of law” are a different matter and are typically enforced. Those broader clauses show up in high-value commercial leases, software licenses, and government contracts, and they can require consent or renegotiation before the deal can close.
Pending lawsuits do not disappear with the target. The survivor is automatically substituted as the defendant in any ongoing litigation, and any resulting judgments or settlements become the survivor’s direct financial responsibility. That is one reason the acquiring company’s pre-closing due diligence focuses heavily on pending and threatened claims, along with debts, regulatory issues, intellectual property, and key contracts. Problems surfaced during diligence can lead to a lower price, additional indemnification protections for the buyer, or a decision to walk away.
Environmental and Product Liability Follow the Survivor
Successor liability can reach back decades. Under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA), a corporation that acquires another by merger or consolidation inherits the predecessor’s liability for contaminated sites, even if the contamination occurred long before the deal and even at properties the target no longer owns.1United States Environmental Protection Agency. Liability of Corporate Shareholders and Successor Corporations for Abandoned Sites Under CERCLA The same principle applies to pending tort claims: product liability lawsuits, personal injury claims, and similar actions against the target become the survivor’s problem.
Antitrust Review Has to Clear First
Federal law requires the companies to notify the government before completing certain mergers. Under the Hart-Scott-Rodino (HSR) Act, both the acquiring and target companies must file a premerger notification with the Federal Trade Commission and the Department of Justice if the deal exceeds the applicable dollar thresholds.2Office of the Law Revision Counsel. 15 USC 18a – Premerger Notification and Waiting Period For 2026, the key reportability threshold is $133.9 million, and deals valued above $535.5 million are reportable regardless of the size of the companies involved. Each party also pays a filing fee that scales with the size of the transaction, starting at $35,000 and reaching $2,460,000 for the largest deals.3Federal Trade Commission. New HSR Thresholds and Filing Fees for 2026
Once both parties file, a mandatory waiting period begins. For most transactions, the companies cannot close for 30 days. For cash tender offers and certain bankruptcy-related sales, the waiting period is 15 days.4Federal Register. Premerger Notification Reporting and Waiting Period Requirements During that window, regulators evaluate whether the combined company would substantially lessen competition or tend to create a monopoly. If they have concerns, the agencies can issue a “second request” for more information, which extends the waiting period and can add months to the timeline. If the agencies conclude the merger would violate antitrust law, they can ask a court to block it.
Mergers in regulated industries, including banking, telecommunications, insurance, and energy, may also need approval from industry-specific federal or state regulators before closing.
Shareholders Vote, and Then Trade Shares for the Deal Price
For public companies, the merger has to be put to the shareholders. The company files a Schedule 14A proxy statement with the Securities and Exchange Commission that describes the transaction terms, the financial advisors’ opinions, and the effects on stockholders.5eCFR. 17 CFR 240.14a-101 – Schedule 14A Information Required in Proxy Statement If the survivor is issuing new shares as merger consideration, it also files a Form S-4 to register those securities before they can be distributed.6Securities and Exchange Commission. Form S-4 State corporate law governs the vote threshold. Most states require a majority of the outstanding shares entitled to vote; some require a supermajority.
What shareholders receive depends on how the deal was structured. In a stock-for-stock merger, old shares are extinguished and replaced with shares of the surviving entity at a set exchange ratio. In a cash deal, shareholders receive a fixed dollar amount per share. Many deals mix the two. After the vote, shareholders get a letter of transmittal with instructions for surrendering their old shares.
Short-Form Mergers and Squeeze-Outs
When a parent company already owns at least 90 percent of a subsidiary’s stock, most states allow a short-form merger with no shareholder vote. The parent files the merger certificate, and the remaining minority shareholders are cashed out at the price the parent sets. Some states also permit an intermediate-form merger at a lower ownership threshold, as low as a simple majority of outstanding shares, when the acquisition follows a tender offer and meets specific statutory conditions.
Appraisal Rights for Dissenting Shareholders
A shareholder who believes the merger price undervalues their stock can exercise appraisal rights. This remedy lets a dissenting shareholder petition a court for an independent determination of the “fair value” of their shares instead of accepting the merger price. To preserve the right, the shareholder typically has to avoid voting in favor of the merger, file a written demand before the vote, and keep continuous ownership of the shares through the effective date. If the court sets a higher value, the company pays that amount plus interest.
Tax Consequences Depend on What Shareholders Receive
Whether shareholders owe tax at closing depends on the structure of the deal. If the transaction qualifies as a “reorganization” under Internal Revenue Code Section 368, shareholders who exchange their old shares for stock in the surviving company generally recognize no gain or loss at the time of the exchange.7Office of the Law Revision Counsel. 26 USC 354 – Exchanges of Stock and Securities in Certain Reorganizations A statutory merger or consolidation is one of the qualifying transaction types, provided it meets the requirements of IRC Section 368(a)(1)(A).8Office of the Law Revision Counsel. 26 USC 368 – Definitions Relating to Corporate Reorganizations
When the consideration includes cash or other non-stock property, called “boot,” the picture shifts. A shareholder who receives boot along with stock has to recognize gain up to the amount of cash or the fair market value of the non-stock property.9Office of the Law Revision Counsel. 26 USC 356 – Receipt of Additional Consideration If the exchange looks like a dividend distribution, part or all of that gain can be taxed as dividend income rather than capital gain. Shareholders in a fully taxable cash acquisition recognize gain or loss on the full difference between the cash received and their basis in the old shares.
Employees, Benefits, and Mass Layoffs
The surviving entity becomes the new employer of record for every staff member of the merged company. Employment contracts, non-compete agreements, and confidentiality agreements carry over as part of the corporate succession. Employees generally complete new tax withholding forms to reflect the change in the legal entity paying their wages.
When each company runs its own 401(k) or pension plan, those plans either merge or one is terminated. Federal law requires that each participant’s benefit after a plan merger or transfer be at least as large as it would have been if the plan had terminated immediately before the merger.10Office of the Law Revision Counsel. 29 USC 1058 – Mergers and Consolidations of Plans or Transfers of Plan Assets If the survivor terminates an existing plan instead, federal rules on distributing vested benefits and notifying participants apply.
Health coverage continuity under COBRA is a common pressure point. Federal regulations assign responsibility for COBRA continuation coverage based on the deal structure and which entity maintains a group health plan afterward. If the selling group keeps a health plan after the sale, it stays responsible for COBRA for affected former employees. If the selling group ends all health plans and the buyer continues the business operations, COBRA responsibility shifts to the buyer. The parties can allocate COBRA responsibility between themselves by contract, but if the assigned party fails to perform, the party with the original legal obligation remains on the hook.11eCFR. 26 CFR 54.4980B-9 – Business Reorganizations and Employer Withdrawals From Multiemployer Plans
If the merger produces large job cuts, the Worker Adjustment and Retraining Notification (WARN) Act may apply. Employers with 100 or more full-time employees must provide at least 60 calendar days of written notice before a plant closing or mass layoff.12Office of the Law Revision Counsel. 29 USC Chapter 23 – Worker Adjustment and Retraining Notification The seller is responsible for any required notice for layoffs up to and including the effective date of the sale; after that date, the buyer takes over.13eCFR. 20 CFR Part 639 – Worker Adjustment and Retraining Notification An employer that violates the notice requirement is liable to each affected employee for back pay and the cost of benefits for up to 60 days of the violation period, and may face a civil penalty of up to $500 per day payable to the local government. That penalty is waived if the employer pays all affected employees within three weeks of the layoff.14Office of the Law Revision Counsel. 29 USC 2104 – Administration and Enforcement of Requirements