Before Your Company Is Sold for Stock

I’m Mateo Dellovo, a fiduciary adviser for people paid in company stock. When your company agrees to be bought and the price is paid in the buyer’s shares, you don’t get a number. You get a ratio. This page covers the money side, from where the terms are written to holding the buyer’s stock, and the questions to answer before the close. If the price is all cash, the guide Before Your Company Is Sold for Cash is the one to read.

A public company reports the signed deal on Form 8-K within four business days, usually with the merger agreement attached. When the buyer issues shares to you, it usually registers them on Form S-4, and what you read is a proxy statement and prospectus in one. It summarizes the terms and the reasons for the deal, and it has a section on the federal income tax consequences, often titled Material U.S. Federal Income Tax Consequences of the Merger. Read that section and the one on equity awards first.

At a private company the documents are the merger agreement and whatever the company sends holders to approve the deal. Where this page says the proxy, read those. If the buyer issues shares to you without registering them, they are usually restricted securities, and Rule 144 makes you hold them six months before selling if the buyer has been a reporting company for at least 90 days, and a year if it hasn’t.

Registered shares you receive in an ordinary merger aren’t restricted. If you become an officer, a director or a large holder of the buyer, Rule 144 still sets the conditions for your sales.

With a fixed exchange ratio you get a set number of buyer shares for each of yours. The number doesn’t change after signing, so the value you receive moves with the buyer’s share price until the close, up or down.

With a fixed value, the number of shares adjusts instead, usually from the buyer’s average price over a set number of days before closing. A collar limits how far that adjustment goes, and outside its band the ratio stops adjusting and the value moves again. The proxy says which one your deal uses.

Buyers usually don’t issue fractional shares. You get cash for any fraction, figured the way the merger agreement sets, often from the buyer’s price around the closing. That cash is taxed as if you sold the fraction.

Some deals pay every holder the same mix, a set amount of cash plus a set number of shares. Others let you elect cash or stock for each share, within limits on the total of each.

The election form has a deadline, usually close to the expected closing. If holders elect more of one form than the deal allows, that form is cut back pro rata and part of your payment comes in the other, so you may not get what you elected. If you don’t elect, what you get can depend on what everyone else elected.

If the deal qualifies as a reorganization, exchanging your shares only for the buyer’s shares isn’t taxed at the close. If cash comes with the shares, gain is taxed, but not more than the cash, and a loss isn’t allowed on that exchange. Gain and cash are figured lot by lot, so a loss on one lot can’t offset a gain on another.

Your basis carries over to the buyer’s shares, lowered by the cash and raised by any gain, and so does your holding period. Long term stays long term.

A deal paid partly in cash can still qualify. If you receive only cash in an election deal, those shares are generally treated as sold, with gain or loss. If the deal doesn’t qualify at all, the whole exchange is a taxable sale at the value of the shares and cash you receive.

The proxy says whether the deal is intended to qualify, and closing is often conditioned on a tax opinion from counsel, though some deals can close without one. After the close, the buyer reports the effect on basis on Form 8937, often posted on its website.

In a stock deal, unvested options and RSUs are often assumed by the buyer or converted into the buyer’s awards at a ratio set in the merger agreement, on the same vesting terms. They can also be cashed out, canceled or sped up, and options priced above the deal value can be canceled for nothing. The merger agreement, the plan and your award agreements decide which.

Single trigger means awards vest on the sale itself. Double trigger means vesting speeds up only if the deal closes and you then lose your job without cause or quit for good reason, usually within a set period.

A converted RSU is taxed like any RSU, as pay on the value delivered when it vests, at the buyer’s share price that day. Your employer can withhold federal income tax at a flat 22%, and must withhold 37% on supplemental pay above $1 million in a calendar year from one employer. If your top bracket is higher, you may owe more with your return.

An incentive stock option the buyer swaps for its own keeps its status when the swap meets the regulation’s tests. Among them, the spread doesn’t grow, the ratio of option price to share value is no more favorable, and the new option adds no benefit. A swapped nonqualified option that meets the same tests isn’t treated as a new grant under section 409A.

Shares you already bought through incentive stock options or a section 423 employee stock purchase plan, still inside their holding periods, aren’t treated as sold when they are exchanged in a reorganization. A later sale of the buyer’s shares is tested against your original dates. The holding periods are more than two years from the grant and more than one year from the purchase or exercise. An employee stock purchase plan’s current offering period is often ended early, with a final purchase shortly before the close.

If you’re an officer, own more than 1% of the company’s stock, or are among the top 1% of employees or the top 250, whichever group is smaller, above a set pay level, the golden parachute rules can apply. When payments tied to the deal reach three times your average taxable pay over the five years before the deal, the part above one times that average carries a 20% excise tax on top of income tax.

Stock and options count the same way cash does, and when the deal only speeds up vesting you would have earned by staying, part of the value counts, not all of it. A private company can take payments out of the rules with a vote of shareholders holding more than 75% of the voting power, after full disclosure. Public companies can’t use that vote.

Section 1202 can exclude some or all of the gain on qualified small business stock from federal income tax. If your shares qualify and the buyer’s stock doesn’t, the buyer’s shares you receive in a reorganization keep your original acquisition date, so the holding period carries on. The exclusion then reaches only the gain built in at the exchange, and growth in the buyer’s stock after that doesn’t qualify.

For stock acquired on or before July 4, 2025, the exclusion needs more than five years. For stock acquired after that date, it’s 50% at three years, 75% at four and 100% at five. When only 50% or 75% of a qualifying gain is excluded, the rest of that gain is taxed at up to 28%, and California doesn’t follow the federal exclusion.

After the close, the buyer’s stock is your stock. The SEC puts it plainly. You’ll be exposed to significant investment risk if you invest heavily in shares of your employer’s stock or any individual stock. Decide before the close how much of your net worth you want in it, counting the converted awards that haven’t vested yet.

Until the close, your company’s insider trading policy still applies to you, and so may its trading windows. If your company is public and you own shares, you can sell before the close or hold and receive the buyer’s shares. A sale before the close is taxed like any sale. Holding puts off the tax on the stock part if the deal qualifies, and keeps you exposed to the buyer’s price and to the deal closing late or not at all.

If you work for the buyer, its insider trading policy applies to you, and so may its trading windows. The law turns on whether you’re aware of material nonpublic information when you trade. A Rule 10b5-1 plan lets you set sales in advance, by date, number or price. It protects you only if you adopt it when you have no material nonpublic information and act in good faith with respect to it. If you aren’t a director or officer (board members and the officers who report their trades to the SEC), the first trade can happen 30 days after you adopt the plan. If you become one, or own more than 10% of a class of the buyer’s stock, each trade goes on a Form 4 within two business days.

Receiving the buyer’s shares in an exchange that qualifies as a reorganization isn’t a purchase for the wash sale rule. A loss on selling the buyer’s shares can still be disallowed if you buy more within 30 days before or after. Many practitioners treat a vest as an acquisition for this rule, so keep any sale at a loss clear of the 30 days around a vest.

Signing and the 8-K come first. Then the Form S-4, which the SEC may review, and the shares can’t be issued until it is declared effective. The proxy gives the record date and the meeting date for the vote. In an election deal, the election deadline is announced in the proxy, on the form or by press release. A deal large enough to need an antitrust filing can’t close until a waiting period ends, 30 days after the filings unless the agencies end the wait early or ask for more information. The proxy lists the other approvals.

The closing date is an estimate. The documents say the deal may not close, and the agreement carries an outside date, after which either side can usually call it off. After the close, an exchange agent delivers your shares and any cash. Converted awards keep vesting on their dates unless the agreement says otherwise, and your first trading window at the buyer is set by its policy.

Then the tax dates. Gain on what you receive at the close lands in the year the deal closes. If you expect to owe at least $1,000 after withholding, and your withholding covers less than the smaller of 90% of this year’s tax or 100% of last year’s, 110% if last year’s adjusted gross income was over $150,000, or $75,000 if married filing separately, the IRS expects estimated payments in April, June, September and the following January. In a deal that qualifies, your broker reports the cash part on Form 1099-B early the next year, and the exchange of shares itself isn’t reported as a sale.

1. Is your deal a fixed ratio or a fixed value, is there a collar, and what does the buyer’s price do to what you receive?
2. Is cash part of the price, and if you can elect cash or stock, by which deadline, and what happens if your election is prorated?
3. Does the proxy say the deal is intended to qualify as a reorganization, and is closing conditioned on a tax opinion?
4. For each lot you hold, what is your basis, and which lots would the cash make taxable?
5. Do you need estimated payments for the year the deal closes?
6. What happens to each of your awards, assumed, converted, cashed out or sped up, and on what trigger?
7. Do you hold incentive stock option or employee stock purchase plan shares still inside their holding periods, and what are their original dates?
8. Could the golden parachute rules reach you, and if your company is private, will shareholders vote on the payments?
9. Could your shares qualify under section 1202, and what is the gain built in at the exchange?
10. How much of your net worth will sit in the buyer’s stock after the close, and how much do you want there?
11. When is your first trading window at the buyer, and what does its policy ask of you?