Double-Trigger Vesting

Double-trigger vesting is an arrangement under which an equity award becomes payable only after two stated conditions have both occurred. No statute defines the phrase, and no regulator uses it. It describes a drafting pattern, which is why the same two words are attached to two structures that have almost nothing in common beyond the number two.

The first structure belongs to private-company equity: units vest on time and on a liquidity event, so that nothing is delivered, and nothing is taxed, until there is a market to sell into. The second belongs to change-in-control and severance agreements: unvested equity accelerates only if the company is acquired and the holder's employment then ends in a way the agreement defines as qualifying. A reader who learned the phrase in a startup and then reads it in an executive employment agreement, or the reverse, will get the meaning backwards, because in the first case the second trigger is a good event and in the second case it is a bad one.

The private-company sense, in brief. Restricted stock units at a private company commonly require both a service condition and a liquidity event before shares are delivered. The reason is tax: delivering shares in a company with no market would create ordinary income on stock the employee cannot sell to pay the tax on. This site covers that design and its consequences on the vesting entry and the startup equity entry, and it is not repeated here.

The change-in-control sense is the one nothing else covers, and it works differently. Here the award already has an ordinary vesting schedule. The question the agreement answers is what happens to the unvested part if the company is bought. Three answers are common, and they are not variations on a theme:

Single trigger. Unvested awards accelerate on the closing of the deal itself. The holder is fully vested the day the transaction completes, regardless of what happens to their job.

Double trigger. Unvested awards accelerate only if the deal closes and the holder's employment then ends in a qualifying way, usually a termination without cause or a resignation for "good reason", within a protection window running from the closing. Absent that termination, the awards simply continue vesting on their original schedule under the new owner.

No acceleration. The awards continue or are exchanged for the acquirer's equivalent, with no special treatment at all.

Why boards and acquirers prefer the double trigger. Single-trigger acceleration hands an acquirer a company whose most valuable employees are fully vested on the day the deal closes, which removes the retention the acquirer is paying for. The double trigger is the compromise: it keeps people incentivized through and after the transaction, while protecting them against the specific risk that the transaction itself costs them their job. Employees reading this from the other side should note that it is a compromise, not a protection, and that the single trigger is the better term for them.

The second trigger is defined in the contract, and the definitions carry the money. "Cause", "good reason" and the length of the protection window are all drafted terms, and they vary. "Good reason" typically covers events like a material reduction in pay or responsibilities or a required relocation, but only where the agreement says so, and it usually requires the employee to give notice and allow a cure period before resigning. An employee who resigns without following that procedure can forfeit acceleration they would otherwise have had.

A common override is easy to miss. Many plans provide full acceleration if the acquirer does not assume or substitute the awards. So "double trigger" does not mean "nothing happens at closing" in every case; it means nothing happens at closing provided the awards survive the deal in some form.

Where to read the actual terms. For a public company, the Securities and Exchange Commission requires disclosure of exactly this. Regulation S-K Item 402(j) obliges a registrant to "describe and explain the specific circumstances that would trigger payment(s)" on a termination or a change in control for its named executive officers, to quantify the estimated payments and benefits in each covered circumstance, and to describe material conditions attached to them, including non-compete and non-solicitation obligations. The Item never uses the words "double trigger", but the section of a proxy statement it produces is where a company's real triggers can be read. For everyone else the source is the equity plan document and the individual award agreement, both of which the employer will supply on request.

One tax rule reaches only a narrow group. Where payments contingent on a change in ownership or control run to a "disqualified individual" under section 280G of the Internal Revenue Code, meaning an officer, a shareholder or a highly compensated individual within the highest paid 1 percent of employees or the highest paid 250, whichever is fewer, and those payments reach three times a "base amount" computed from the individual's average annual compensation over the five taxable years before the change, the section applies. The three-times figure is only the trigger, and reading it as the taxable threshold is the easy mistake: once it is crossed, the "excess parachute payment" is everything above one times the base amount allocated to the payment, not everything above three times it. The corporation loses the deduction for that excess, and section 4999 imposes a 20 percent excise tax on the recipient on top of ordinary tax. Whether accelerated equity counts, and how much of it, is a computation under the section's regulations rather than something a reader can estimate from the face of an award.

1. Read which pair of triggers the document actually names. A liquidity event and a service period is one structure; a change in control and a qualifying termination is a different one.

2. In the change-in-control case, find the definitions. What counts as a change in control, what counts as cause, what counts as good reason, how long the protection window runs from closing, and what notice the employee must give.

3. Find the assumption clause. What happens if the acquirer does not take the awards on. Full acceleration is a common answer, and it is a materially different outcome.

4. Then value it. The stake is the unvested balance at the deal price, and that number is what makes the definitions worth reading.

A hypothetical example of what the structure is worth. Priya holds 6,000 unvested restricted stock units when her employer is acquired at $52 a share. The unvested stake is 6,000 × $52 = $312,000.

If her award carried single-trigger acceleration, all of it would vest at closing: $312,000 delivered whether she stays or goes.

With double-trigger vesting, nothing happens at closing. The units continue on their original schedule under the acquirer. If she is terminated without cause four months later, inside the agreement's protection window, the remaining unvested units accelerate and the balance is delivered then. If she stays, they simply vest as they always would have. And if the acquirer had declined to assume the awards, her plan's assumption clause might have accelerated the whole $312,000 at closing after all, despite the double trigger. Same three words, three different outcomes, decided entirely by documents that existed before the deal. All figures are illustrative.

Pros

• It protects against the specific risk that the transaction which creates the value also eliminates the job needed to earn it.
• It is materially better for the holder than no acceleration at all, which is the realistic alternative in many deals.
• Because it preserves retention value, it is a structure acquirers and boards will actually agree to, so it is available to negotiate for.
• In the private-company sense, the second trigger prevents a tax bill on shares that cannot yet be sold.

Cons

• It is worse for the holder than single-trigger acceleration, and that is the point of it from the company's side.
• Everything turns on drafted definitions of cause, good reason and the protection window, which the employee usually has no ability to change after signing.
• A resignation that does not follow the agreement's notice and cure procedure can forfeit acceleration entirely.
• The phrase itself is ambiguous, so an employee can hold two awards using "double trigger" to mean two different things.
• For a narrow group of executives, acceleration on a change in control can pull payments into the section 280G parachute rules and a 20 percent excise tax.