A plan of merger is the written agreement that governs the combination of two or more corporations into a single surviving entity. It identifies the companies involved, names the one that will continue, spells out what each shareholder receives, and sets the terms the surviving corporation will operate under once the deal closes. State corporate law dictates what the document must contain, how it gets approved inside each company, and what has to be filed with the state before the merger legally takes effect.
What Must Be in the Document
Every state’s corporate code lists a set of mandatory provisions. The specifics vary, but states that follow the Model Business Corporation Act and those with independent codes converge on the same core items.
The plan must name every corporation participating in the merger and designate which one survives. The survivor keeps operating as if nothing happened, holding on to its contracts, permits, and business relationships. Every other participating corporation ceases to exist when the merger becomes effective.
The plan sets out the terms and conditions of the combination, including how the assets and liabilities of each disappearing corporation move to the survivor. That transfer happens automatically by operation of law, but the document still describes the overall framework and any specific arrangements the parties negotiated.
Share conversion is where the economics live. The plan explains exactly how shares, options, and other equity interests in each participating corporation convert into shares, cash, or other consideration in the surviving entity. That means stating the exchange ratio (for example, 0.75 shares of the survivor’s stock for every share of the target) or the cash price per share paid to shareholders of the disappearing company.
When an exchange ratio produces fractions, the plan usually says what happens: a cash payment in place of the fraction, rounding to the nearest whole share, or actual fractional ownership. Most deals use cash in lieu because tracking fractions is an administrative headache.
Finally, the plan addresses the survivor’s charter. If the merger will amend the surviving corporation’s articles or certificate of incorporation, the full text of those amendments goes in. If nothing changes, the plan simply says the existing charter stays in effect.
Who Has to Approve It
Completing a merger means clearing two internal gates at each participating corporation: the board of directors first, then the shareholders.
Board Approval
The board of each corporation involved must adopt the plan by resolution. A majority vote is the standard threshold, though a company’s articles or bylaws can require a supermajority. Board approval both authorizes the transaction and sends the plan to shareholders with the board’s recommendation.
Shareholder Vote
Once the board signs off, the plan goes to shareholders unless a statutory exception applies. The corporation sends written notice of the meeting to every shareholder, voting or not. The notice has to state that considering the merger is on the agenda and must include a copy or summary of the plan. Most states require the notice to go out at least 10 to 20 days before the meeting.
The typical voting threshold is a majority of the shares entitled to vote on the plan. Some charters or state statutes require a supermajority, such as two-thirds of outstanding shares. If any class or series of stock votes as a separate group, each group has to clear its own threshold.
When Shareholders Do Not Vote
Two exceptions remove the shareholder vote. The first is the short-form merger. When a parent corporation owns at least 90 percent of the voting power of each class of a subsidiary’s outstanding shares, the parent can merge the subsidiary into itself without a vote from either company’s shareholders. The parent’s board adopts a resolution, and the subsidiary’s minority shareholders receive whatever that resolution specifies. The outcome of any vote at 90 percent ownership is a foregone conclusion, so the law skips the step.
The second exception covers mergers that barely change the surviving corporation. If the merger will not amend the survivor’s charter and will issue shares equal to less than 20 percent of the same class already outstanding, the survivor’s shareholders generally do not need to vote. NYSE and Nasdaq rules impose a parallel 20 percent trigger, requiring listed companies to obtain shareholder approval before issuing shares equal to or exceeding 20 percent of outstanding voting power.
Filing With the State
After internal approvals are locked in, the surviving corporation files a Certificate of Merger (called Articles of Merger in some states) with the Secretary of State or equivalent office. This filing does not reproduce the full plan. It certifies that a plan was adopted and approved in compliance with the applicable statute.
The certificate names every participating corporation and identifies the survivor. It confirms that the required board and shareholder approvals were obtained, with vote tallies or a statement that the vote met or exceeded the required threshold. If the deal used a short-form structure that skipped the shareholder vote, the certificate says so and cites the statute.
The filing specifies when the merger takes effect. The effective date can be the moment the state accepts the certificate or a future date chosen by the parties, typically up to 90 days after filing. That flexibility lets the legal closing line up with other milestones like regulatory clearances or financing. State filing fees generally run from $25 to $250.
What Changes the Moment It Takes Effect
Once the effective date arrives, a set of legal consequences happens automatically by operation of law, with no further action required.
The surviving corporation keeps going. Every other corporation that merged into it stops existing as a separate legal entity. All property, contract rights, and other assets owned by the disappearing corporations vest in the survivor without any deeds, assignments, or transfer documents. All debts, obligations, and liabilities of the disappearing corporations become the survivor’s. Pending lawsuits carry over, with the survivor substituted as a party.
Shareholders of the disappearing corporations lose their shares and become entitled only to whatever the plan promised them, whether stock in the survivor, cash, or a mix.
Shareholders Who Object
Shareholders who oppose the merger are not stuck with whatever the plan offers. Every state provides some form of appraisal rights (also called dissenters’ rights) that let an objecting shareholder demand a cash payment for the judicially determined “fair value” of their shares instead of taking the merger consideration.
The procedures are strict. A shareholder who wants to preserve appraisal rights has to deliver written notice to the corporation before the shareholder vote, stating an intent to demand payment if the merger goes through, and then not vote in favor of the merger. Voting yes or consenting in writing kills the right, even if the written demand was already delivered.1LexisNexis. Model Business Corporation Act 3rd Edition – Section 13.22 Missing any deadline forfeits the right permanently. Most failed claims fail here: shareholders learn about appraisal rights too late or assume they can object after the vote.
Appraisal is not available in every merger. Roughly 38 states have adopted some form of “market-out” exception, which denies appraisal to shareholders of publicly traded companies on the theory that the open market gives them an exit. The scope varies. Some states deny appraisal to all shareholders of public companies. Others deny it only when shareholders receive publicly traded stock, and restore it when the consideration is cash. A smaller group adds an interested-party carve-out, so appraisal survives when a controlling shareholder sits on both sides of the deal. About 12 states have no market-out exception at all.
Tax and Antitrust Gates
Two outside bodies of law can shape or delay a merger even after the state paperwork is in order.
On the tax side, a statutory merger can qualify as a tax-free reorganization under Internal Revenue Code Section 368 (a “Type A” reorganization), which defers capital gains tax for the target’s shareholders.2Office of the Law Revision Counsel. 26 U.S. Code 368 – Definitions Relating to Corporate Reorganizations Qualifying requires that target shareholders keep a continuing equity interest in the survivor, that the survivor continue the target’s historic business or use a significant portion of its assets, and that the reorganization serve a legitimate business purpose beyond tax avoidance. The IRS has treated 40 percent stock consideration as enough to satisfy the continuity requirement and 20 percent as insufficient.3eCFR. 26 CFR 1.368-1 – Purpose and Scope of Exception of Reorganizations When the merger qualifies and shareholders receive only stock, they recognize no gain or loss on the exchange; basis carries over.4Office of the Law Revision Counsel. 26 U.S. Code 354 – Exchanges of Stock and Securities in Certain Reorganizations Cash or other non-stock consideration (“boot”) triggers taxable gain up to the amount received.
The disappearing corporation also has to file a final federal income tax return for the period ending on the effective date, marked as a final return, and file IRS Form 966 to report the plan of dissolution or liquidation.5Internal Revenue Service. Closing a Business The survivor, as successor, is responsible for making sure those filings get done, and only the survivor keeps its EIN.
On the antitrust side, mergers above certain dollar thresholds cannot close until the parties file a premerger notification with the Federal Trade Commission and the Department of Justice under the Hart-Scott-Rodino Act and observe a mandatory waiting period. For 2026, a filing is required when the transaction is valued above $133.9 million and the parties meet certain size tests: one party with at least $267.8 million in total assets or annual net sales, and the other with at least $26.8 million. Transactions valued above $535.5 million require a filing regardless of the parties’ size.6Federal Trade Commission. Current Thresholds Filing fees start at $35,000 and climb with deal size.7Federal Trade Commission. Filing Fee Information The standard waiting period is 30 days, which the agencies can extend by issuing a “second request” for additional information. Closing before the waiting period expires (called “gun-jumping”) draws civil penalties that currently exceed $50,000 per day. Mergers below the thresholds can still be challenged if they substantially lessen competition, but HSR is the procedural tripwire that catches most mid-size and large deals.