4 Pitfalls of Stock Options: Exercise Price, Vesting Period, Repurchase Rights, Taxes

In today's workplace, Stock Options are often packaged as a shortcut to financial freedom and serve as key leverage for startups to attract core talent. However, the path from paper wealth to actual cash realization is fraught with uncertainty. Countless cases prove that without a deep understanding of agreement terms, this promise can easily become worthless "waste paper" or even a financial black hole requiring cash payments upon resignation. One must clearly recognize that options are not immediate equity or cash, but a future right to purchase attached to strict conditions; their true value depends entirely on successfully navigating obstacles hidden in contract details.

The asset's fate is determined not by the total shares promised by HR, but by four critical, often overlooked dimensions: the Strike Price, which defines your profit baseline and safety margin; Vesting schedules and post-termination exercise windows, which act as invisible shackles on career choices; Repurchase rights containing unfair terms that risk forced low-price buyouts upon departure; and complex tax calculations and exercise costs that can create immense cash flow pressure before monetization. This article aims to establish a systematic guide to avoiding pitfalls and assessing value. By cutting through complex legal jargon to analyze these four risks, it helps professionals understand the underlying logic of options during hiring negotiations or resignation disputes, ensuring the agreement is a realizable asset rather than an empty promise.

Why Might Stock Options Be "Waste Paper"? Core Logic and Overview of Pitfalls to Avoid

When joining a startup, HR will often paint a picture of "financial freedom," promising you Stock Options worth millions. However, reality is often much crueler than the curves in a PPT: many times, these options ultimately become nothing more than a piece of waste paper, and might even cause you to lose money when you resign.

To understand the true value of options, one must first shatter a core misconception: Options are not equal to Shares/Stock, nor are they equal to hard cash.

Options vs. Equity: Owning Rights Does Not Equal Owning Assets

"Options" are essentially a "future right to buy." The company promises that after meeting certain conditions (such as working for 4 years), you have the right to purchase the company's stock at the current price (strike price).

This is fundamentally different from being granted stock directly (such as RSUs - Restricted Stock Units):

• Equity/RSU: The company gives you stock directly. As long as the company's value does not drop to zero, it has value.
• Options: You only profit when the Company's Current Stock Price > Strike Price. If the company's valuation does not grow significantly, or breaks the issue price after IPO, your options' value may be zero, or even negative (counting exercise costs and taxes).

As pointed out by Jiemian News' analysis, the main value of options lies in "liquidity." If the company cannot list or be acquired, or if you are "washed out" by clauses before cashing out, all that paper wealth will return to zero.

The 4 Major "Pitfalls" Determining the Life or Death of Options

Many candidates only focus on "how many shares are given," but ignore the four key dimensions that determine whether this wealth can actually be pocketed. If you step on a mine in any of these four links, the option agreement in your hand may turn into an uncashable "empty check."

The following is the core pitfall-avoidance framework for evaluating option value, and these are the four key points this article will break down one by one:

This framework applies not only to entry negotiations but also to evaluating the option agreements you currently hold. Next, we will analyze these four dimensions in depth and teach you how to scrutinize your Offer with the eyes of an investor.

Pitfall #1: Strike Price — Are Your Options Really "Cheap"?

Many job seekers, when facing an option offer, often fall into the "quantity trap": staring only at "how many shares are given" (e.g., 10,000 shares), while ignoring the most critical Strike Price. In fact, the value of options does not depend on how many pieces of "paper" you hold, but on the Spread behind that paper.

The strike price is the cost you must pay to purchase company stock in the future, while the Fair Market Value (FMV) is the current actual value of the stock. Your actual gain can be simply summarized by the following formula:

Option Gross Profit = (Current Stock Market Price - Strike Price) × Number of Shares

If you don't understand this logic, you can easily be misled by a high number of shares. Please look at this simple mathematical comparison:

• Situation A (Seemingly Generous): The company gives you 10,000 shares, strike price $5, current FMV per share$6.
• • Your cost: $50,000
  • Your potential profit: ($6 -$5) × 10,000 = $10,000
  • Risk: If the stock price drops by just $1, your option value becomes zero.
• Situation B (Seemingly Stingy): The company gives you 2,000 shares, strike price $0.1, current FMV per share$6.
• • Your cost: $200
  • Your potential profit: ($6 -$0.1) × 2,000 = $11,800
  • Advantage: Even if the stock price is cut in half, you still have significant room for profit.

This brings up the importance of assessing risk by calculating the break-even point in option trading. As mentioned in Master How to Calculate Option Expiration Profit and Loss, a transaction can only generate a net profit when the price of the underlying asset exceeds the break-even point of "Strike Price + Cost".

In cases where the strike price is too high, once the company encounters financing difficulties or a valuation correction (Down Round), your options can easily become "Underwater Options"—that is, the strike price is higher than the market price, resulting in a price inversion. At this point, the options in your hand not only fail to bring returns but may even face the awkward situation of "loss upon purchase" when exercising. Therefore, judging whether the strike price is at a safe "level" is the first step in evaluating the value of an offer.

How to Determine if the Strike Price is Reasonable?

When receiving an option grant agreement, many people only focus on "how many shares were given" but overlook "what the strike price is." If the Strike Price is set too high, your options may lack room for appreciation from the start, or even remain "unprofitable" after the company's valuation rises.

The core of judging whether the strike price is reasonable lies in "price comparison." You need to find a reference point, usually the price of preferred stock from the company's most recent financing round, or the Fair Market Value (FMV) assessed by a third party.

1. Finding a Reference Point: Investor Entry Price vs. Employee Strike Price

In a mature startup ecosystem, employees usually receive Common Stock, while investors hold Preferred Stock with liquidation preferences. Since the rights of common stock are subordinate to preferred stock, the strike price of employee options should be significantly lower than the investor's entry price.

• Silicon Valley/USD Fund Standard (409A Valuation): Under the US system, companies usually hire third parties to conduct a 409A valuation. Due to liquidity discounts, the fair market value of common stock (i.e., your strike price) is usually only 20% - 50% of the investor's preferred stock price.
• Domestic/RMB Fund Status Quo: Some domestic startups have misconceptions regarding pricing, sometimes equating the "latest financing valuation" directly with "fair value," resulting in employee strike prices being equal to the VC investment price. This is known as a "fatal flaw" in option design because it greatly compresses the employee's profit space.

2. The "Safe Zone" of Valuation Stages

According to Lingdong Weilai's data analysis, for companies at different development stages, the reasonable ratio of strike price to the latest financing valuation (Discount Ratio) usually falls within the following ranges:

• Early Stage (Series A and prior): Risk is extremely high, so the option premium should be high. A reasonable strike price is usually around 30% of the latest financing price.
• Growth Stage (Series B to Series D): The business model is gradually validated, and risk decreases. The strike price usually rises to 40% - 60% of the latest financing price.
• Pre-IPO: Valuation approaches secondary market logic, and the strike price may reach 80% - 90% or even higher of the financing price.

If a Series A company gives you a strike price as high as 90% or even 100% of the investor price, it means you have to bear the high risk of a startup without enjoying the low-cost advantage of the early stage.

3. Beware of the "Valuation Trap" Checklist (Red Flags)

Before signing the agreement, please check against the following list. If the following situations occur, it indicates that the "value" of the option is questionable:

• 🚩 1:1 Pricing (The 1:1 Trap): The strike price is exactly equal to the price per share of the previous VC investment. This means you have no "safety cushion"; you only start making money if the company's valuation continues to rise. Furthermore, your starting line is the same as investors who have liquidation preferences, which is unequal in terms of the risk-reward ratio.
• 🚩 Refusal to Disclose Valuation Data: When you ask HR "What was the price per share in the company's most recent financing round?", they refuse to answer on the grounds of "confidentiality." Options where the spread cannot be calculated are just blind boxes.
• 🚩 Underwater Options: When the financing environment deteriorates (Down Round), the company's current valuation may already be lower than the strike price when you received the options. At this point, exercising the option is not only unprofitable but effectively "buying at a loss."

4. Your Action Guide: Questions to Ask HR

Don't just look at the isolated number on the Offer; try to politely but professionally ask for the following information to assess the true value of the options:

Suggested Script:
"I see the strike price is $5/share. May I ask roughly what the preferred stock price for investors was in the most recent financing round (e.g., Series B)? I would like to understand the approximate discount of the current strike price relative to the market valuation."

If HR cannot provide a specific amount, at least ask to confirm the approximate ratio between the strike price and the latest financing price. A responsible employer should be able to clearly explain the pricing logic, rather than letting employees sign agreements in the fog.

Pitfall 2: Vesting Period — The Mess Left Behind When You Quit

Many job seekers fall into a misunderstanding when receiving an Offer: thinking that the "10,000 stock options" written on the Offer belong to them from day one. In fact, options are a long-term promise wearing "golden handcuffs" and must pass the time test of the Vesting Period to truly be pocketed.

Before signing the agreement, you need to focus on the "Vesting Schedule". The most common industry standard is "4-Year Vesting with a 1-Year Cliff":

• 1-Year Cliff: This is the most easily overlooked risk point. If you resign or are fired in the 11th month of employment, the options you get are 0. Only after working for a full 12 months can you receive the first 25% of the options at once. This is like needing to climb a cliff for a year; if you fall, you have nothing.
• Monthly/Annual Vesting: After crossing the cliff, the remaining 75% usually vests linearly on a monthly (1/48) or quarterly basis.

As pointed out in Guoling Law Firm's analysis on equity vesting mechanisms, this mechanism is essentially "promise first, give later," aimed at binding core talent and avoiding the uncertainty of early personnel turnover.

The Timeline Trap of Ownership:

Misconception Warning: You do not own "Unvested" options. Once you leave, all unvested parts usually become immediately void and return to the company option pool.

Suppose you are granted 40,000 shares, vesting over four years:

• Leave after 6 months: Take away 0 shares.
• Leave after 1 year: Take away 10,000 shares (vested), lose 30,000 shares.
• Leave after 2.5 years: Take away 25,000 shares, lose 15,000 shares.

In resignation negotiations, the unvested portion of options is often the most powerful bargaining chip in the company's hands, and it is also the pain point where employees most easily feel that things are "a mess."

Acceleration and Post-Termination Exercise Window

In addition to the regular schedule, there are two advanced clauses that directly determine whether the options in your hands still have value at critical moments (such as when the company is acquired or when you leave).

1. Acceleration Clause (Acceleration)

What happens to unvested options when a change of control occurs (such as being acquired by a giant)? This involves "acceleration" clauses:

• Single Trigger: As long as the company is acquired, all your unvested options vest immediately and fully. This is extremely beneficial to employees, but very rare in agreements for ordinary employees.
• Double Trigger: Options only accelerate vesting when the company is acquired and you are not retained by the new company (or are fired without cause). This is a more common clause in Silicon Valley and domestic tech circles.

2. Post-Termination Exercise Period (PTEP)

This is the biggest financial trap faced by the vast majority of departing employees.

After you leave the company, you must decide within a specific period whether to exercise (spend money to buy the stock). The industry standard is usually 90 days.

• Cash Flow Deadlock: Suppose you have vested options worth $1 million, the exercise cost is$100,000, plus potentially huge taxes. If you cannot come up with this cash within 90 days after leaving, or the stock cannot be cashed out because the company is not listed (liquidity is zero), you will be forced to abandon these hard-earned vested options.
• Waste Paper Risk: Many employees fail to consider this "redemption fee" when changing jobs, eventually leading to the options becoming void.

Guide to Avoiding Pitfalls:
Check the PTEP clause before joining a company or during resignation negotiations. Although 90 days is the industry rule, in recent years some employee-friendly companies (such as early cases like Pinterest, Coinbase, etc.) have started offering exercise windows as long as 7 years or even 10 years. This allows employees to keep their options after leaving the company until the company goes public or there is liquidity before exercising, thus avoiding the tragedy of "the person leaves, and the options are gone too."

Acceleration and the Post-Termination Exercise Window

Beyond standard Time-based Vesting, there are two clauses that are easily overlooked but have a huge impact on final returns: the "acceleration mechanism" during M&A, and the "exercise countdown" upon resignation.

1. Acceleration in Acquisition Scenarios

When a company is acquired or undergoes a Change of Control, what happens to your unvested options? This involves the "Acceleration" clause. There are usually two trigger modes:

• Single Trigger: As long as the company is acquired, all unvested employee options vest immediately (Fully Vested). This is most favorable to employees, meaning you can cash out and leave immediately, but it is very rare in ordinary employee option agreements and usually applies only to executives.
• Double Trigger: This is the current mainstream clause in the market. It requires two conditions to be met for acceleration: (1) The company is acquired; (2) Within a certain period after the acquisition (e.g., 12 months), the employee is terminated without cause or forced to resign (Constructive Termination) by the new company. This mechanism protects employees from being purged while also reassuring the acquirer (since employees won't take the money and leave immediately after the acquisition, maintaining team stability).

Pitfall Avoidance Advice: Carefully check if the agreement contains a Double Trigger clause. If not, once the company is acquired at a low price and your options haven't vested, you might end up with nothing.

2. The "Race Against Time" After Departure: 90-Day Exercise Window (PTEP)

This is the biggest "invisible killer" faced by the vast majority of departing employees.

When you leave the company (whether voluntary resignation or layoff), your vested options are usually not kept forever. Most standard option agreements stipulate that employees must decide whether to exercise within 90 days after leaving (Post-Termination Exercise Period, PTEP).

This is a huge financial trap due to "cash flow mismatch":

1. High Cost: To keep these options, you must pay real money for the "strike price" and potential "income tax" within 90 days. For early employees, this amount could reach hundreds of thousands or even millions of RMB.
2. Liquidity Deadlock: If the company is not yet public, the stock you spend a fortune buying back cannot be sold on the open market (Illiquid).

This leads to a cruel reality: many employees hold valuable vested options, but because they cannot come up with hundreds of thousands in cash to pay exercise costs and taxes, or dare not bet on whether the company will definitely go public in the future, they can only watch helplessly as their options expire on the 91st day.

Industry Trend: To solve this problem, Silicon Valley and some Chinese tech companies have started promoting more friendly "long-term exercise window" policies (such as Pinterest, Coinbase, etc.), extending the post-termination exercise period from 90 days to 7 years or even 10 years. This allows employees to exercise when the company actually goes public or has liquidity opportunities, greatly reducing financial risk for employees.

In well-known cases such as the option dispute between DXY and its former CTO, the handling of options after departure and the repurchase price often become the core of the conflict. Therefore, before joining a company, asking HR or Legal about the length of the "post-termination exercise window" is an important touchstone for judging a company's sincerity regarding options. If the window is extremely short and the exercise cost is extremely high, the actual value of this option upon departure may be greatly discounted.

Pitfall #3: Repurchase Rights — Can the Company Take Back Your Stock at Any Time?

Many candidates believe that once they have survived the Vesting Period and paid to Exercise their options, the stock they receive is their private property and the company has no right to interfere. This is a huge misconception.

In the option agreements of a Private Company, Repurchase Rights are a clause that is easily overlooked but extremely damaging. It grants the company the right to forcibly buy back your vested stock when you leave (whether you resign voluntarily or are terminated).

The original intention of this clause is to keep the "Cap Table" clean and prevent departing employees (especially former employees joining competitors with a large number of shares) from continuing to occupy the company's equity quota. However, for employees, the core risk lies not in "being repurchased," but in "at what price it is repurchased."

1. Worlds Apart in Repurchase Prices: FMV vs. Cost Price

The most critical detail in repurchase clauses is the pricing mechanism. If the agreement is not explicitly stipulated, or if the terms are extremely harsh because the employee is in a weak position, you may face the risk of "leaving empty-handed."

There are usually two distinctly different repurchase pricing logics:

• Fair Market Value (FMV):
  This is a relatively fair approach. The company repurchases your stock at its fair value at the time of departure (usually referencing the latest round of financing valuation or a third-party appraisal price). Although you lose the potential higher returns (Upside) from a future IPO, at least you cash out the current appreciation.
• At Cost / Strike Price:
  This is the biggest pitfall. The clause stipulates that the company has the right to repurchase at the cost price (i.e., the strike price) at which you originally purchased the stock.
  > Consequence Simulation: Suppose you worked hard at the company for 4 years, and the company's valuation increased 10 times. When you leave, the company initiates a "cost price repurchase." This means the returns on the stock you held for 4 years instantly drop to zero, and you only get back the principal you originally invested. In effect, this is equivalent to you lending money to the company interest-free for 4 years without receiving any investment return.

2. The Definition Trap of "Good" vs. "Bad" Leavers

To balance fairness, many agreements set different repurchase prices based on the reason for departure. Here lies the second risk point: the definition of Termination for Cause.

• Good Leaver: Usually refers to non-renewal upon contract expiration, resignation due to health reasons, or mutual separation. In this case, the company will usually repurchase at FMV or an agreed discounted price.
• Bad Leaver: Usually refers to serious violation of company regulations, breaking the law, or violating non-compete agreements. In this case, the company will usually forcibly repurchase at "cost price" or even confiscate the options.

The risk lies in the scope of the definition of "Cause." If the labor contract or option agreement defines vague terms such as "substandard performance" or "insubordination" as "Cause," the company can easily use this to classify you as a Bad Leaver during layoffs or disputes, thereby taking back your valuable stock at cost price.

According to 36Kr's analysis on equity incentive exit mechanisms, both DXY (Dingxiangyuan) and SouFun have experienced intense disputes caused by unclear or improperly handled repurchase prices upon resignation. In the SouFun case, a former employee sued because the company delayed confirming option rights for a long time; ultimately, the court ruled against the company, and the employee received proceeds amounting to millions of dollars. This conversely proves that if repurchase clauses are unclear or abused, not only do employees suffer, but legal landmines are also buried on the company's path to IPO.

Action Guide to Avoid Pitfalls

When signing a Stock Option Agreement or Shareholders Agreement, be sure to check the following two points:

1. Search for the keyword "Repurchase": Confirm whether the company possesses mandatory repurchase rights. If so, see clearly whether the pricing formula is "Fair Market Value" or "Exercise Price".
2. Beware of "Lower of Cost or FMV": Some unfair clauses will state "repurchase price is the lower of cost or market value," which effectively locks your profit cap at zero and must be firmly negotiated for modification.

Pitfall 4: Taxes — The "Cash Flow Trap" of Losing Money Before Earning It

Many candidates only stare at the "paper value" figures of option value during salary negotiations, ignoring a cruel financial reality: options are not free lottery tickets, but checks that require you to pay out of your own pocket to redeem.

For employees of unlisted companies, tax issues are often the most hidden and deadly "cash flow trap." Unlike the intuitive perception of paying taxes only after cashing out stocks, the Tax Trigger for options usually occurs at the moment of Exercise, not when you sell the stock. This means you may need to pay a huge amount of tax before receiving a single penny of cash return.

1. Tax Triggers and "Salary and Wages" Tax Rates

In most tax jurisdictions globally (including China and US NSO options), option income is taxed in two stages with vastly different rates:

1. Exercise Stage (High Tax Rate): When you decide to exercise and convert options into stock, the tax bureau treats the difference between the "Fair Market Value (FMV) on the exercise date" and the "Strike Price" as your salary and wage income.

• • In China, this portion applies a progressive tax rate of 3% to 45%. If your paper floating profit is large, this income can easily push you into the highest marginal tax rate of 45%.
  • According to analysis by Zhonglun Law Firm, only equity incentives meeting specific filing conditions may enjoy deferred taxation; otherwise, employees must pay tax immediately upon exercise.

1. Transfer Stage (Low Tax Rate): When you sell the stock in the future, the appreciation where the selling price exceeds the FMV on the exercise date is usually subject to a 20% capital gains tax as "income from transfer of property."

The trap lies in: Most of the gains (i.e., the appreciation from the grant date to the exercise date) are usually categorized under the high-tax "salary and wages" category, while only the appreciation held after exercise enjoys the low tax rate.

2. The Cash Flow Trap

The most extreme risk occurs when you leave a high-valuation but unlisted company. Since most option plans stipulate that options must be exercised within 90 days of resignation or they become void, you will be forced to face a dilemma: give up all options, or pay a huge amount of cash to "redeem yourself" while the stock is illiquid.

This creates a typical "cash flow inversion":

• Cash you must pay: Exercise cost (to the company) + Personal Income Tax (to the tax bureau).
• Assets you receive: A pile of paper stocks that cannot be sold in the market for the time being.

3. Doing the Math: Why Might Taxes Be Higher Than Costs?

To intuitively understand this pitfall, let's look at a simplified calculation model. Suppose you joined a unicorn company 4 years ago and are now preparing to leave:

• Options Held: 10,000 shares
• Strike Price: $1 / share (original cost)
• Current Fair Market Value (FMV): $21 / share (valuation after company financing)

When you decide to exercise:

1. Cost paid to the company: $1 × 10,000 = $10,000.
2. Taxable paper gain (Spread): ($21 -$1) × 10,000 = $200,000.
3. Tax payable: Assuming this huge gain applies an average effective tax rate of 35% (easily reached under a progressive tax system), you need to pay $200,000 × 35% = $70,000.

Final Result:
You need to immediately pay $80,000 ($10,000 exercise fee +$70,000 tax) in hard cash.
What you hold in your hand is only paper wealth worth $210,000. If the company later fails to list or its valuation is halved, you not only lose the$10,000 principal but also cannot recover the $70,000 tax already paid. This is the typical "losing money before making money."

Practical Warning: During the bubble period of the high-valuation primary market, many employees even borrowed money to pay exercise taxes to keep their options, eventually shouldering huge debts because the company failed to list. Before deciding to exercise, be sure to calculate the "tax break-even point" and confirm whether the company has a repurchase mechanism to cover this cash flow expenditure.

Practical Checklist for Avoiding Pitfalls: 5 Questions You Must Ask HR Before Signing

After understanding the four major "pitfalls"—strike price, vesting period, repurchase rights, and taxation—the most critical step is to turn this knowledge into bargaining chips at the negotiation table. Many candidates, when receiving an Offer, often only focus on "how many shares are given" but ignore the legal terms behind these shares.

As some senior programmers mentioned when sharing negotiation experiences, options must be put down in writing; verbal promises mean nothing. To avoid the future dilemma of "holding waste paper" or "paying out of pocket for taxes," please be sure to confirm the following 5 core questions with HR or the Hiring Manager before signing on the dotted line.

1. What is the difference between the Strike Price and the Fair Market Value (FMV)?

Do not just ask "what is the strike price"; ask how it compares to the current Fair Market Value of the company's stock.

• Why ask: Your paper gain = (Current FMV - Strike Price) × Number of Shares. If the strike price equals or is close to the current FMV, this means the options in your hand are currently worth zero (Under water).
• How to avoid the pitfall: The ideal situation is that the strike price is far lower than the current valuation (e.g., only 10%-20% of the valuation), so you come with a "safety cushion" as soon as you join. If the strike price is extremely high, you are paying for the company's future growth, and the risk is extremely high.

2. What is the company's Total Outstanding Shares?

HR will usually tell you "we are giving you 10,000 shares." This number sounds tempting, but without the denominator, the numerator is meaningless.

• Why ask: You need to calculate your shareholding percentage (10,000 shares / 100 million shares = 0.01%, or 10,000 shares / 1 million shares = 1%?).
• How to avoid the pitfall: If the company refuses to disclose the total share capital or valuation on the grounds of "confidentiality," this is a huge red flag. You have every right to know exactly "what fraction" of the cake you have been allocated.

3. How long is the Exercise Window after leaving the job?

This is the fatal clause that causes many employees to be forced to give up options.

• Why ask: The Silicon Valley standard is usually that you must exercise within 90 days after leaving. If you leave before the company goes public, you need to come up with a huge amount of cash to pay exercise costs and taxes within these 90 days.
• How to avoid the pitfall: Ask if the company has a friendlier policy (e.g., PTE, Post-Termination Exercise) that allows employees to exercise within 7 or 10 years after leaving. This can greatly relieve your cash flow pressure and avoid the dilemma of "waste paper if you don't buy, bankruptcy if you do."

4. Is there a Repurchase Clause? How is the price determined?

Many option agreements hide a "company has the right to repurchase" clause; the key lies in the definition of the repurchase price.

• Why ask: To prevent the company from "forcibly buying low" when you leave.
• How to avoid the pitfall: Be wary of vague pricing descriptions, such as "price negotiated by both parties" or "fair price determined by the Board." The worst-case scenario is that the agreement stipulates that if you leave (especially if deemed a termination for cause), the company has the right to repurchase your shares at the original "strike price," which means your years of waiting and appreciation will instantly return to zero. Be sure to confirm whether the repurchase price is clearly pegged to the latest financing valuation or fair market value.

5. Can I see the full Stock Option Plan?

This may be the most important question. The Offer Letter or Grant Letter is usually only 1-2 pages and is just a brief summary; the real legal force lies in the dozens of pages of the full "Plan Document."

• Why ask: All the "pitfalls"—including tax treatment methods, repurchase trigger conditions, and accelerated vesting clauses upon change of control (acquisition)—are written in that full text you haven't seen.
• How to avoid the pitfall: If HR refuses to provide the full text, claiming "this is an internal document, you can only see it after joining," please remain vigilant. Because once you sign and join, you default to accepting all terms of the plan. Insisting on reading the full text, especially the chapters on "Termination" and "Repurchase," is the bottom line for protecting your rights.