Double Trigger Acceleration and Other Change of Control Terms for Startup Stock, Options and RSUs

Startup Equity | Double Trigger Acceleration | Change of Control Terms for Startup Stock, Options and RSUs

What does double trigger acceleration mean? It protects unvested shares from cancellation in a change of control by immediately accelerating those shares if the individual is terminated as part of the change of control. Founders, executives and key hires, including employee-level hires at early stage startups, negotiate for Double Trigger Acceleration in their equity grant documents at the offer letter stage.

Attorney Mary Russell counsels individuals on startup equity, including:

You are welcome to contact her at (650) 326-3412 or at info@stockoptioncounsel.com.

Originally published June 5, 2018. Updated July 27, 2023.

Change of Control Terms for Startup Stock, Options and RSUs

Startup stock, options and RSUs vest over time. Since they vest over time, some may not be vested when the company has a change of control (aka merger or acquisition). What happens to the unvested shares at change of control? It depends on the fine print in your equity documents.

Founders, executives and key hires, including employee-level hires at early stage startups, often negotiate for Double Trigger Acceleration to protect their unvested shares. Advisors and some founders and rare executives may negotiate for Single Trigger Acceleration so that their shares immediately vest at acquisition. However, these protections are not often negotiable for employee-level hires except at very early stage companies. Their equity will be governed by the general terms of the Plan, which will likely be either an unfavorable Cancellation Plan.

Single Trigger Acceleration

The ideal change of control acceleration term is Single Trigger Acceleration - so that 100% of unvested shares vest immediately upon change of control. Investors and companies often argue against this term because the company may be an unappealing acquisition target if its key talent will not be incentivized to stay after closing. This is especially true for technical talent at a technology company.

Advisors, some founders and rare executives may negotiate for Single Trigger Acceleration if they can make the case that their role will not be needed after change of control. For example, advisors naturally negotiate for Single Trigger Acceleration because their primary role is to advise a company at the startup stage. They would not be necessary after an acquisition as they’ve fulfilled their purpose by that time. Founders and executives sometimes argue for Single Trigger Acceleration based on aligning incentives. For example, I’ve worked with a CFO who negotiated for 50% Single Trigger Acceleration because he was hired with the express purpose of improving the company’s financial position to achieve an acquisition. Those with similar arguments may even negotiate for Single Trigger Acceleration to apply at IPO, which would be a very unusual term but a logical incentive for certain hires.

Double Trigger Acceleration

The next best term is Double Trigger Acceleration, in which unvested equity immediately vests if both of two triggers are met. First, the company closes a change of control. Second, the individual’s service is terminated for certain reasons (most often a terminated by the company without Cause or a voluntary resignation by the individual for Good Reason).

Founders, executives and key hires, including employee-level hires at early stage startups, negotiate for Double Trigger Acceleration in their equity grant documents at the offer letter stage.

The key argument for Double Trigger Acceleration is based on risk. If an individual at any level of the organization is taking a significant risk to join the company, such as sacrificing significant cash or other compensation elsewhere to join, they advocate for Double Trigger Acceleration to protect their upside in the event that the equity becomes valuable. A grant of 1% with Double Trigger Acceleration is more valuable because of that protection of the upside. A second key argument for this term is based on “aligning incentives.” If individuals on the team could lose valuable unvested equity by achieving a prompt acquisition, their incentives would not be aligned with the company’s goals of closing that deal. Double Trigger Acceleration rights bring the individuals' incentives in alignment with the company's goals.

This Double Trigger Acceleration protection is negotiated at the offer letter stage and included in the final equity grant documents.  The key negotiable terms in this clause are:

  1. Full acceleration so that a qualifying termination at any time after acquisition accelerates 100% of unvested shares;

  2. Application to a qualifying termination in anticipation of, or for a certain protective period of time prior to, change of control;

  3. Application to terminated by the company for Cause (narrowly defined, not to include arguable performance terms);

  4. Application to a resignation by the individual for Good Reason (defined broadly to include a change in cash compensation, a reduction in duties or reporting structure, a geographic change, and anything else that would amount to constructive termination for the individual);

  5. A broad definition of change of control including a sale of substantially all the company’s assets;

  6. Immediate vesting at closing of the change of control if unvested shares would otherwise be cancelled without payment under a Cancellation Plan term. More on this here from Cooley:

Often overlooked, however, is that in order for double-trigger acceleration to be meaningful, the option grant or equity award must actually be assumed or continued by the acquiror in the transaction. This will not always be the case in a transaction – aquirors often have their own plans and ideas for incentivizing their employees. If an unvested option or equity award terminates in connection with a transaction, then technically, there will be no unvested options or awards to accelerate if the second trigger (i.e., the qualifying termination) occurs after the transaction.

Continuation Plan

If the startup’s Equity Incentive Plan includes a continuation term, the value of the unvested shares continue to vest after change of control so long as the individual stays in service after the closing. We’ll call this style of plan a Continuation Plan. The unvested shares are likely to be converted into another form, such as RSUs in the acquiring company or cash deal consideration. But the value is protected so that the deal value per share paid to vested shares at closing will be paid to these unvested shares on each subsequent vesting date. If the individual is terminated or resigns for any reason, they would not be paid out. If the deal does not provide for such continuation or substitution, unvested equity will be accelerated so that it becomes 100% vested and paid at closing.

If an employee's total number of shares was worth $200,000 at the acquisition price, and only 50% had vested at the acquisition, the employee would be paid $100,000 at closing. But the unvested shares would be replaced with a substitution or continuation award in exchange for the $100,000 in unvested value. That might be in the form of cash to vest over time, continuing awards in the original company, or new equity in the acquiring company's equity. Whatever the form, it would continue to vest over the remaining portion of the original vesting schedule.

Without the Double or Single Trigger Acceleration protections described below, the individual could be terminated for any reason, at any time, and would lose the unvested shares.  However, those who stay at the acquiring company under a Continuation Plan will continue to earn the deal consideration for their unvested shares. (But beware. Those with unvested equity under a Continuation Plan may also be asked to sign new employment agreements forfeiting these rights as part of the acquisition, since the company’s leverage of termination is significant).

Cancellation Plan

Most startup Equity Incentive Plans allow the company to cancel unvested shares without payment in an acquisition. We’ll call this type of plan a Cancellation Plan. Under a Cancellation Plan, unvested equity can be cancelled and replaced with $0, even if the unvested shares had significant value at the time of the acquisition. For example, if an employee's total number of shares was worth $200,000 at the acquisition price, and only 50% had vested at the acquisition, the employee would be paid $100,000 at closing. The unvested value of $100,000 could be cancelled without payment even if the employee stayed on as an employee after the acquisition. In another example, if the employee was within the first year of service and had a one-year cliff vesting schedule, 100% of the grant could be cancelled without payment even if it was immensely valuable based on the deal price/share.

The distinction between a Cancellation Plan and the more protective Continuation Plan is not usually a negotiable term. The exception to this would be at a startup with employee-friendly founders and executives who are willing to advocate for changes to their Plan with the board and stockholders. When startup candidates encounter this term in their offer negotiation document review, their best course of action is likely to be to negotiate for Single Trigger Acceleration or Double Trigger Acceleration for their individual grants.

Negotiating Change of Control Terms

The availability of Single Trigger Protection or Double Trigger Protection and/or the distinction between a Cancellation Plan and a Continuation Plan is a factor in assessing the risk of joining a startup. If the fine print protects 100% of the unvested shares, the shares have a higher potential upside for the employee or executive. Without these protections, it may make sense to negotiate for a higher cash package or a higher number of shares to balance risk. Check out more on my blog about market data for startup equity offers and other key terms that affect the risk of startup equity including clawbacks and tax planning for stock options.


Attorney Mary Russell counsels individuals on startup equity, including:

You are welcome to contact her at (650) 326-3412 or at info@stockoptioncounsel.com.

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RSUs - Restricted Stock Units - Evaluating an RSU Offer at a Startup

Working for a startup? Here’s how to think about Restricted Stock Units or RSUs.

Originally published February 10, 2014. Updated March 27, 2017 and July 5, 2023.

Attorney Mary Russell counsels individuals on startup equity, including:

You are welcome to contact her at (650) 326-3412 or at info@stockoptioncounsel.com.

Working for a startup? Here’s how to think about RSUs.

What are RSUs?

Restricted Stock Units ("RSUs") are not stock. They are not restricted stock. They are not stock options. RSUs are a company's promise to give you shares of the company's stock (or the cash value of the company's stock) at some time in the future.

How Many Shares Do I Have?

One RSU is equivalent to one share of stock. The number of RSUs in your grant determines how many shares of stock (or the number of shares of stock used to determine your cash payment) you will receive when they are "settled" on the Settlement Date.

You’ll receive one share of stock (or the cash value of one share of stock) for every vested RSU on the Settlement Date. For startup (private company) RSUs, the Settlement Date is usually a company Liquidity Event. A company Liquidity Event might include (i) a Change of Control (aka Merger or Acquisition); (ii) after an IPO, when post-IPO lockup on employee sales expires or (iii) a company choice to have an early settlement in shares.

When are Startup RSUs Taxed?

Most startup RSUs are structured elegantly to defer taxes until after the shares can be sold to cover the taxes. That’s achieved with a two-tier vesting schedule. Before the RSUs fully vest (so they can be “settled” in shares or cash on the Settlement Date), two triggers must be met:

  1. Time-Based Vesting AND

  2. Liquidity-Event-Based Vesting

Time-based vesting is the classic vesting concept. You will meet the time-based vesting requirement over a set period of time of service (called the "Vesting Period"). The most common time- vesting period is quarterly vesting over four years with a 1-year cliff.

The liquidity-event vesting requirement is the tax-deferral concept. The shares will not be settled / fully vested for tax purposes until the company has a Liquidity Event. A company Liquidity Event might include (i) a Change of Control (aka Merger or Acquisition); (ii) after an IPO, when post-IPO lockup on employee sales expires or (iii) a company choice to have an early settlement in shares.

Without this liquidity-event vesting requirement, RSUs could become vested for tax purposes before there is a market to sell the shares (or even before shares are officially received in exchange for the RSUs at settlement). That would be very unappealing for startup employees and executives, as they would need to pay taxes out of their own funds based on the FMV on the vesting date.

[Careful! This two-tier vesting structure (sometimes called double trigger vesting) is a tax deferral mechanism. It is not the same thing as double trigger acceleration upon change of control! Those are often confused so be careful there.]

Do Startup RSUs Expire?

Yes! There’s two issues to watch out for w/r/t expiration / forfeiture of startup RSUs.

All startup RSUs include a deadline, so that if the Liquidity Event is not achieved by a certain date, all RSUs will be forfeited without payment. That is usually 5 or 7 years from the date of grant. Therefore, most RSUs are designed to be forfeited if the company does not go public or get acquired within 5 or 7 years of the employee or executive’s start date even if the RSUs have already time-vested by that date. Unfortunately, this term is not negotiable as it is a tax-driven deadline. The RSUs must be designed with a substantial risk of forfeiture in order to defer taxation.

In addition to this tax-driven deadline, some RSUs include a forfeiture clause. This is similar to the dreaded clawback for vested shares, even though it is technically part of the vesting schedule. Here’s how it works. If an employee or executive leaves the company, they forfeit any time-vested RSUs that have not yet been settled / vested at a Liquidity Event. In other words, the employee or executive has to survive all the way through a Liquidity Event to get anything for their time-vested RSUs. This type of forfeiture term greatly reduces the value of an RSU grant because it is not really "earned" even after the time-based vesting period.

Will I Receive Annual Refresh Grants of Startup RSUs?

Probably not! Most private companies do not make substantial refresh grants either annually or at the time of future financings. In my experience, approximately 90% of the equity individuals receive at startups is in their original, at-hire grant. This likely would be refreshed only after it is close to meeting its full time-vesting requirements.

This is usually a surprise to employees and executives coming from public companies, where regular refreshes are the norm. The reason for the difference is that startups are hoping for huge increases in valuation. If that happens, the original grant would be sufficiently valuable to retain employees and executives. If you are evaluating a job offer, there is a big difference in the value of your offer between a company that grants RSUs only at hire (and after they have vested) and a company that plans to make additional refresh grants regularly.

How Do I Value Startup RSUs?

There is no precise "value" for startup RSUs since they are not liquid (aka easily sold). But employees and executives who are evaluating startup RSUs offers do think about value when their considering how much equity makes sense for their role.

When evaluating the number of RSUs in an RSU grant, employees and executives use one or both of these approaches:

  1. Current Valuation Method (Fact-Based): For startup stock, most hires use the price per share paid by venture capitalists for one share of preferred stock in the most recent financing as a proxy for the value of their RSUs. This is the closest number you can find for today's value. It tells you that X Venture Capitalist paid $Y for one share of the company's stock on Z date. The usefulness of this approach is somewhat limited for stale valuations, especially in the 2022-2023 market. For more on this approach, see Venture Hacks' post on startup job offers.

  2. Percentage Ownership: Executive hires also consider their percentage ownership compared to market for their role at this stage of company. Individuals often struggle to find good resources for startup compensation data since subscriptions to the primary startup compensation data sources are only available on the company side. Here’s a blog post with publicly-available startup compensation data links that readers have found helpful.

  3. Future Valuation Method (Guesstimate Based): To look forward and define a future payout for your RSUs, you have to do some guesswork. If you could guess the startup's value at exit and dilution prior to exit, you would know how much the stock will be worth when you receive it at settlement/post-IPO. Be careful, though, not to use price/share in isolation as stock splits would affect that in unpredictable ways.

Employees and executives often consider these facts to build those approaches of analysis:

  • Recent VC price per share of preferred stock

  • Current number of fully diluted shares in the company or the offered percentage ownership in the company

  • Possibilities around expected dilution, exit scenarios, exit timing and future valuation?

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Attorney Mary Russell counsels individuals on startup equity, including:

You are welcome to contact her at (650) 326-3412 or at info@stockoptioncounsel.com.

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Will this Seed Stage Company Become a Unicorn?

Attorney Mary Russell counsels individuals on startup equity, including:

You are welcome to contact her at (650) 326-3412 or at info@stockoptioncounsel.com.

Wondering if your seed stage startup will become a unicorn? Here's a great illustration of your chances from Dustin Moskovitz's presentation, Why to Start a Startup from Y Combinator's Startup School

Working for a Startup? | Will This Seed Stage Startup Become a Unicorn?

Wondering if your seed stage startup will become a unicorn? Here's a great illustration of your chances from Dustin Moskovitz's presentation, Why to Start a Startup from Y Combinator's Startup School

Attorney Mary Russell counsels individuals on startup equity, including:

You are welcome to contact her at (650) 326-3412 or at info@stockoptioncounsel.com.

Read More