By Harry Prabandham · Updated September 27, 2026
Equity Compensation
Planning Around a Liquidity Event: IPO, Acquisition, or Tender Offer
A liquidity event turns illiquid startup equity into cash or sellable stock. Tax, lockup, and diversification choices around it can matter for years.
Planning Around a Liquidity Event: IPO, Acquisition, or Tender Offer
1 / 7
What counts as a liquidity event?
- A liquidity event is any transaction that lets you turn private-company equity into cash or freely tradable stock.
- Common forms are an IPO, a direct listing, a SPAC merger, an acquisition, and a company-run tender offer or secondary sale.
- Timing is uncertain: companies delay or cancel IPOs and deals, and some never reach one at all.
- Each type has different rules for when you can sell, what you receive, and when tax is due.
Try Our Free Tools
Full Guide
What counts as a liquidity event?
- A liquidity event is any transaction that lets you turn private-company equity into cash or freely tradable stock.
- Common forms are an IPO, a direct listing, a SPAC merger, an acquisition, and a company-run tender offer or secondary sale.
- Timing is uncertain: companies delay or cancel IPOs and deals, and some never reach one at all.
- Each type has different rules for when you can sell, what you receive, and when tax is due.
What decisions come before the event?
- Build an inventory of every grant, including type, strike, vesting, expiration, and whether RSUs are double-trigger.
- Exercising options at a lower pre-event 409A value can reduce the taxable spread, but it ties up cash in shares that could lose value.
- Non-recourse exercise financing avoids personal liability, but providers typically take a share of upside and you may still owe tax if shares fall.
- Gifting or trust planning is often done before value is set, which requires an estate attorney and a qualified appraisal.
How do lockups and trading windows limit selling?
- After an IPO, employees are usually barred from selling for a lockup period; terms vary, but the SEC notes most lockups last 180 days.
- Company insider policies add blackout periods around earnings, even after the lockup ends.
- A Rule 10b5-1 plan sets future sales in advance; the cooling-off period is 30 days for most employees and 90 to 120 days for officers and directors.
- Affiliates such as executives and large holders also face Rule 144 volume and filing requirements.
What changes in an acquisition?
- Cash deals generally trigger tax at closing, while stock-for-stock deals may defer tax if structured as a reorganization.
- Unvested awards may be assumed, converted into the buyer's awards, cashed out, or accelerated, depending on plan documents.
- Part of the price is often held in escrow or paid later as an earnout, and may never be received in full.
- Retention grants from the buyer usually come with new vesting schedules tied to staying employed.
What happens to taxes in the event year?
- Double-trigger RSUs can vest all at once at an IPO, creating a large amount of wage income in one year.
- Federal withholding on supplemental wages is 22% up to $1 million per year and 37% above that, which may still fall short of the actual liability.
- California withholds 10.23% on stock compensation, below its top marginal rate, so state balances due are common.
- Charitable gifts of appreciated stock may be worth more in a high-income year, though 2026 rules add a 0.5% of AGI floor and cap the benefit at 35% for top-bracket itemizers.
After the proceeds arrive
- Many people set aside the estimated tax bill first, in cash or Treasury bills, before making other decisions.
- A written plan for reducing a concentrated position, with dates or price levels, can make selling decisions less emotional.
- Large purchases and lifestyle changes are easier to judge after a cooling-off period of a few months.
- Revisit your estate plan, insurance, and beneficiary designations, since net worth may have changed substantially.
Key takeaways
- Liquidity events vary in type and timing, and none is certain until it closes.
- Pre-event exercise, financing, and gifting choices carry both tax benefits and real risk of loss.
- Lockups, blackout windows, and 10b5-1 cooling-off periods determine when you can actually sell.
- Plan for under-withholding and review decisions with a CPA and estate attorney before acting.
Related Topics
Equity Compensation
Selling RSUs After an IPO: Withholding, Lockups, and a Sell Plan
RSUs are taxed as wages when they vest; after an IPO, a written sell plan helps manage under-withholding, lockups, and concentration.
Equity CompensationDeciding How Much to Sell in a Tender Offer
A tender offer decision is about how much, not yes or no. Weigh concentration, near-term goals, after-tax proceeds, and a range of company outcomes.
Equity CompensationManaging a Concentrated Stock Position: Ways to Diversify and What Each Costs
Reducing a large single-stock position usually combines staged sales, 10b5-1 plans, exchanges, and gifts over several years, each with its own trade-offs.