When a company you own stock in is acquired, every share you hold gets converted into cash, shares of the acquiring company, or a combination of the two, at the price set in the merger agreement. What happens to your shares when a company is acquired depends on the deal structure the buyer chose, whether you hold common stock or employee equity awards, and whether your shares sit in a taxable brokerage account or a retirement account. Most of the work is done for you by an exchange agent after closing. The parts that fall on you are deciding whether to sell early, handling any paperwork the agent requests, and reporting the transaction correctly on your taxes.
What You’ll Receive Depends on the Deal Type
Acquirers pick one of three basic structures, and that choice determines what lands in your account.
All-cash deals. The acquirer pays a fixed dollar amount per share. Your shares are canceled at closing and replaced with cash a few business days later. You know the exact price in advance. Private equity buyers almost always use this structure because they have no public stock to offer.
Stock-for-stock deals. You receive shares of the acquirer instead of cash, based on a conversion ratio spelled out in the merger agreement. A ratio of 0.5 means every two target shares become one acquirer share. The ratio can be fixed, locking in a set number of shares regardless of price movement, or floating, adjusting based on the acquirer’s average share price during a measurement period before closing. A floating ratio cushions you against a drop in the acquirer’s stock but caps your upside if it rises.
Conversion ratios almost never produce whole numbers, so you’ll usually end up entitled to a fractional share. Companies don’t issue partial shares. The exchange agent pays cash for the fraction, which shows up as a small separate deposit alongside the new shares.
Mixed-consideration deals. The most common structure in large public acquisitions. You might receive, say, $30 in cash plus 0.25 acquirer shares per target share. Some mixed deals let shareholders elect their preferred split, though proration caps in the merger agreement usually limit how many holders can tilt one way or the other.
The Window Between Announcement and Closing
Weeks or months pass between the announcement and the actual closing, and your shares keep trading on the exchange that entire time. The target’s stock price usually jumps toward the deal price on the announcement date but rarely matches it exactly. The gap reflects market concern about regulatory review, shareholder rejection, or financing problems that could kill the deal.
Shareholders generally have to approve the acquisition. In a one-step merger, the board schedules a shareholder meeting and a vote is held, usually requiring a majority of outstanding shares. In a two-step structure, the acquirer launches a tender offer directly to shareholders, who individually decide whether to sell at the offered price, followed by a back-end merger to pick up remaining shares.
You don’t have to wait for closing. You can sell on the open market at any point before the deal completes. Some holders prefer the certainty of a market sale at a slight discount to the deal price rather than carrying the risk that the deal collapses. If it does, the target’s stock usually drops sharply back toward where it traded before the announcement.
How You Actually Get Paid
After closing, an exchange agent (typically a commercial bank or trust company) handles the mechanics of swapping old shares for the new consideration. How this affects you depends on how you hold your shares.
Shares Held in a Brokerage Account
If your shares sit in a brokerage account, the exchange is essentially automatic. Your broker processes it through the Depository Trust Company, and the cash or new shares appear in your account within a few business days of closing. No paperwork required. The old ticker disappears and the consideration replaces it.
Paper Stock Certificates
If you still hold physical certificates, you’ll need to mail them to the exchange agent along with a signed Letter of Transmittal.1U.S. Securities and Exchange Commission. CNET Networks, Inc. Letter of Transmittal The form includes your payment instructions and tax certification (a W-9 for U.S. taxpayers, a W-8BEN for non-U.S. holders). Use registered or insured mail. Payment arrives after the agent receives and processes your materials, which can take several weeks.
Lost certificates add a step. The transfer agent will usually require you to buy a surety bond, often called a lost instrument bond, before releasing your funds. These bonds generally cost 1% to 2% of the current share value. If you still hold paper, dealing with it before a merger shows up on the horizon saves real time and expense.
If You Do Nothing
Ignoring the exchange paperwork doesn’t make your money vanish, but it creates work. The exchange agent holds unclaimed funds for a window specified in the merger agreement. After that, the funds revert to the surviving company. Eventually, unclaimed proceeds get reported to the state as abandoned property under escheatment laws, and recovering them means filing a claim with the state’s unclaimed property office, proving your identity and former ownership. The money is still yours. Getting it back is just a lot more effort than returning the Letter of Transmittal on time.
If You Hold Employee Stock Options or RSUs
Employee equity doesn’t follow the same path as common shares held by outside investors. The merger agreement includes a separate schedule for each type of award, and the treatment hinges on whether the award is vested at closing.
Vested Awards
Vested RSUs are treated like common stock and cashed out at the deal price. Vested stock options are cashed out at the “spread,” which is the deal price minus the exercise price. Options with an exercise price of $15 in a deal closing at $40 pay out $25 per option. Underwater options, where the exercise price exceeds the deal price, are canceled with no payment.
Unvested Awards
Unvested awards face one of three outcomes:
- Acceleration. All unvested awards vest at closing and receive the same consideration as vested holders. Full single-trigger acceleration is the most favorable outcome for employees but increasingly rare in large deals, because it leaves the acquirer with a retention problem.
- Substitution. Your unvested awards are replaced with economically equivalent awards in the acquirer, and your original vesting schedule continues under the new company’s stock.
- Cash-out. The intrinsic value of the unvested awards is paid in cash, sometimes immediately and sometimes on the original vesting schedule.
Many companies now use double-trigger vesting, which requires both the acquisition and a qualifying termination (an involuntary layoff, or a constructive dismissal like a pay cut or forced relocation) before unvested awards accelerate. Under double-trigger provisions, the deal alone changes nothing: if the acquirer keeps you in a comparable role, your awards convert to equivalent acquirer awards and keep vesting on the original schedule. Acceleration kicks in only if you’re terminated without cause within a set window, commonly nine to eighteen months.
How Equity Payouts Are Taxed
For non-qualified stock options, the spread is ordinary income subject to federal income tax and FICA withholding, just as it would be on a normal exercise.2Internal Revenue Service. Topic No. 427, Stock Options Your employer withholds before the money reaches you.
Incentive stock options are trickier. Favorable capital gains treatment normally requires holding the underlying shares more than two years from grant and more than one year from exercise.3Office of the Law Revision Counsel. 26 U.S.C. 422 – Incentive Stock Options A cash-out merger forces a sale before you can hit those marks, turning it into a disqualifying disposition: the spread at exercise is taxed as ordinary income, and anything above fair market value at exercise is capital gain.
Executives and highly compensated employees face a further risk. If total merger-related payments (accelerated equity, severance, bonuses) equal or exceed three times your average annual compensation over the prior five years, the excess becomes a “golden parachute” payment.4Office of the Law Revision Counsel. 26 U.S.C. 280G – Golden Parachute Payments The excess carries a 20% excise tax paid by the recipient on top of regular income tax.5Office of the Law Revision Counsel. 26 U.S.C. 4999 – Golden Parachute Payments Some employment agreements include a “gross-up” where the company covers the excise tax; others include a “best net” cutback that trims your payment to just below the threshold if that leaves you with more after-tax.
Taxes on the Exchange
For shares held in a regular taxable account, the merger is a taxable event. Severity depends on the deal structure and how long you’ve held the stock.
All-Cash Deals
A cash merger is treated as a sale. Your capital gain or loss equals the cash received minus your adjusted cost basis. Stock held more than one year qualifies for long-term capital gains rates of 0%, 15%, or 20% depending on taxable income.6Internal Revenue Service. Topic No. 409 Capital Gains and Losses For 2026, the 20% rate kicks in at $545,500 for single filers and $613,700 for married couples filing jointly. Shares held a year or less are taxed at ordinary income rates up to 37%.
Higher earners also owe the 3.8% net investment income tax on capital gains when modified adjusted gross income exceeds $200,000 single or $250,000 married filing jointly.7Internal Revenue Service. Net Investment Income Tax That pushes the maximum federal rate on long-term gains to 23.8%.
Stock-for-Stock Deals
A stock-for-stock exchange can qualify as a tax-deferred reorganization under the Internal Revenue Code, meaning you owe no tax on the exchange itself.8Office of the Law Revision Counsel. 26 U.S.C. 368 – Definitions Relating to Corporate Reorganizations You carry your original cost basis and holding period forward into the new shares, and the tax bill waits until you sell the acquirer’s stock. Not every stock deal qualifies; the merger proxy statement will say whether the transaction is intended to be tax-deferred.
Your basis in the new shares equals the basis of the old shares, decreased by any cash received and increased by any gain recognized.9Office of the Law Revision Counsel. 26 U.S.C. 358 – Basis to Distributees
Mixed Deals and the “Boot” Rule
When a deal that otherwise qualifies as a tax-deferred reorganization also pays cash, the cash is called “boot.” You recognize gain on the boot, but only up to the total gain you actually realized on the transaction.10Office of the Law Revision Counsel. 26 U.S.C. 356 – Receipt of Additional Consideration If your total realized gain is $10,000 and you receive $15,000 in cash boot, you’re taxed on $10,000, not $15,000. The stock portion remains deferred.
Qualified Small Business Stock
If you hold qualified small business stock under Section 1202, a merger has outsized consequences. QSBS held at least five years qualifies for up to a 100% exclusion on capital gains, capped at the greater of $10 million or ten times your adjusted basis.11Office of the Law Revision Counsel. 26 U.S.C. 1202 – Partial Exclusion for Gain From Certain Small Business Stock For QSBS issued after July 4, 2025, a tiered exclusion applies: 50% at three years, 75% at four, and 100% at five.
In a cash-out merger, the exclusion applies if you’ve hit the holding period. In a stock-for-stock reorganization, QSBS status can carry over to the new shares in certain qualifying exchanges, preserving the holding period. If the transaction doesn’t meet those requirements, you lose the QSBS status on the replacement shares. The difference between carryover and loss can be a six- or seven-figure tax bill, so verify treatment before closing.
Shares Held in Retirement Accounts
If your shares sit inside a traditional IRA, Roth IRA, or 401(k), the merger itself isn’t a taxable event. Cash or new shares just land inside the account, and taxes wait until distribution (or never, for qualifying Roth distributions).12Internal Revenue Service. Rollovers of Retirement Plan and IRA Distributions
The one scenario that can create tax exposure is a 401(k) holding company stock that gets terminated or restructured as part of the deal. If cash proceeds are distributed to you rather than rolled into another qualified plan or IRA, the distribution is taxable, and a 10% early withdrawal penalty may apply if you’re under 59½. You have 60 days to roll the money into another retirement account. Request a direct rollover from the plan administrator; an indirect rollover triggers mandatory 20% federal withholding, forcing you to make up the withheld amount from other funds to complete the full rollover.
Reporting the Transaction
Report the sale on IRS Form 8949 and carry totals to Schedule D.13Internal Revenue Service. About Form 8949, Sales and Other Dispositions of Capital Assets Your broker or the exchange agent will send a Form 1099-B showing the proceeds.14Internal Revenue Service. Instructions for Form 8949 Check the 1099-B against your own records. Cost basis reporting is frequently wrong, especially for shares acquired through employee equity programs, reinvested dividends, or older purchases where the broker never had your original purchase data. Wrong basis means overpaying or underpaying, and the IRS matches its records to the broker’s.
If You Think the Price Is Too Low
Most states give shareholders who object to the deal price the right to petition a court to independently determine the “fair value” of their shares. This is called an appraisal right or dissenter’s right. Instead of accepting the merger consideration, you ask a judge to decide what your shares were worth, and the company pays that amount.
The process is demanding. You have to formally object before the shareholder vote, refrain from voting in favor, and file a court petition within tight statutory deadlines. The litigation is expensive and can run for years. Courts sometimes find a fair value below the deal price, leaving you worse off than shareholders who simply took the deal. Appraisal is a real option only when there’s genuine evidence the price undervalued the company, not just a feeling that you deserved more.