Equity & liquidity events

Preparing for your company's IPO — what it means for your equity

An IPO is the moment paper equity can finally become money — but it rarely works the way people expect. Lock-ups, double-trigger RSUs and the tax bill all land at once. Here's what to understand before the window opens.

Part of our guide to equity in a liquidity event.

When a private company lists, the employees holding its equity face a short, high-stakes set of decisions. The good outcomes tend to go to people who understood the mechanics before the S-1 landed — not those scrambling in the week of the roadshow. There are four things that decide what an IPO actually means for you.

Why this is on everyone's mind right now. The largest private tech companies are moving toward the public markets. As of November 2026, Anthropic is reported to be preparing an IPO — the Financial Times and other outlets reported it is targeting a listing around this period, though, as with any IPO, the exact timing can and does slip. Whether it's your employer or not, the same mechanics below govern what a listing means for the shares and options you hold.

1. The lock-up — you usually can't sell on day one

An IPO makes your shares public, not instantly sellable. Employees and insiders are almost always bound by a lock-up period — commonly 90 to 180 days after listing — during which you can't sell. The price can swing a long way in that window, up or down, while you simply hold. Plan around the lock-up expiry, not the IPO date.

2. Double-trigger RSUs — a tax bill can land at the IPO

Many late-stage private companies grant double-trigger RSUs: the units only settle when two conditions are met — you've hit the time-based vesting and there's a liquidity event such as an IPO. The listing trips that second trigger, so RSUs that have been quietly time-vesting for years can all settle at once. That settlement is ordinary income, often a large figure in a single tax year — even though the lock-up may stop you selling shares to pay for it. Find out whether yours are single- or double-trigger, and budget for the withholding gap.

3. Options and AMT — exercise timing matters

If you hold options rather than RSUs, when you exercise drives the tax. Exercising ISOs while the company is still private — when the 409A value is lower — generally means a smaller bargain element and can start the clock toward long-term capital-gains treatment. Exercise after a big IPO pop and the spread, and the AMT exposure, is usually far larger. There's no one right answer — it turns on cash, risk and conviction — but it's a decision best made before the rush, not during it.

4. After the lock-up — trading windows and 10b5-1 plans

Once the lock-up lifts, you still can't trade whenever you like. Public-company employees sell during open trading windows and steer clear of blackout periods around earnings; many set up a 10b5-1 plan — a pre-scheduled selling plan that lets shares sell on autopilot without the risk of trading on what you know. If you'll be left holding a concentrated position in one stock, decide your diversification plan in advance.

Get ready before the window opens

A listing is one of the few moments your equity turns real. The people who do well are the ones who did the homework early:

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Further reading

General, independent references on how private-company shares and options work. We're not affiliated with any of them.

How we keep this accurate. We write from primary sources — official tax authorities (HMRC, IRS), financial regulators (FCA, SEC) and company filings — date every page, and review them regularly. This is independent, educational information, and deliberately not a substitute for professional tax, legal or financial advice on your own situation.

General information only — not financial, tax or legal advice. Every situation is different; check your own share and option agreements and take professional advice before selling. PrivateTechShares is an education and tools service: it is not a broker or marketplace, does not introduce buyers and sellers, does not hold funds, and does not execute or advise on transactions.