OpenAI IPO May Slip to 2027: Plan 2026 Liquidity Before AMT

If the listing you were waiting for slips at a frontier startup, the trap is to keep treating the next listing date as your only exit. The rule is simpler: test the liquidity you can reach now, and price the tax cost of exercising before the decision date passes.

OpenAI CEO Sam Altman ruled out a 2026 public listing because of AI safety concerns. He named 2027 as the more plausible year. OpenAI had paused a trillion-dollar listing effort in June 2026. The company also repurchased employee shares at a valuation of $852 billion.

The pause comes while both companies are still moving toward public markets. OpenAI and Anthropic had filed confidential IPO documents and were seeking valuations close to $1 trillion. Anthropic is expected to list before the end of 2026, with some estimates reaching $2.3 trillion. The contrast matters: one company can pause while another keeps its timetable. For holders, the exit can change while you are still deciding how to use your shares.

That sequence changes the plan. A tender offer or secondary sale can move value before a public listing. If you hold unexercised incentive stock options, or ISOs, the tax question is whether exercising now creates an alternative minimum tax (AMT) bill you did not budget for.

Waiting can turn a liquidity question into a tax surprise

Many holders assume that if no shares are sold, no tax is due. That assumption fails for ISOs. Exercising an ISO can create an AMT preference item, the amount that can trigger the tax. It equals the spread between fair market value and exercise price, even if you keep the shares.

The spread is the entry fee. If the company's value rises, the spread rises with it. If you exercise late, you may pay more for the same shares and carry a larger AMT base into the next year.

AMT is a parallel tax calculation that can override the regular tax result. It matters here because ISO exercise can create a preference item even when no regular income tax is due. The result is a bill in the exercise year, not necessarily in the sale year.

Run the no-IPO-year math before you choose

Start with the shares you already own. Ask whether the company will run a tender, allow a secondary, or provide a buyback. A tender can be the cleanest way to cash, but it is not guaranteed. Done means a written answer from the company: what is available, to whom, at what price, and by when.

A tender is a company-sponsored offer to buy some shares at a set price. A secondary is a sale of existing shares, often through a company-approved process. A buyback can do the same job with a simpler process. The difference is control: the company sets the terms, and you may not be able to sell all your shares.

Then model the ISO exercise. Count the shares you could exercise, estimate the current fair market value, and subtract the exercise price. That spread is the AMT preference item. Compare the cash needed to exercise against the cash you could get from a tender or secondary. If the exercise cost is high and the liquidity option is weak, the answer may be to wait.

The warning: people go wrong by exercising to start the required ISO holding period without a plan to fund the tax. The tax can be due before the liquidity is available. If you cannot pay the exercise price and the possible AMT bill, the exercise becomes a liability.

Test liquidity, model AMT, and set a decision date

• Confirm whether a tender or secondary is possible. Ask for the company's current liquidity program in writing. Done means a dated answer that names the option, the eligible shares, the price, and the deadline.
• Model AMT on ISO exercise. Build a simple table: shares, exercise price, fair market value, spread, and the cash needed to exercise. You are done when you have a number for the possible AMT preference item and a separate number for the cash you need at exercise.
• Set an exercise-and-sell decision date. Pick a date before the next listing and before any tender deadline. Use that date to choose: exercise if the liquidity option is strong and the tax is fundable; wait if either is weak. The date works when it carries the liquidity answer, the AMT model, and the cash you can actually pay.
• Document the assumptions. Write down the valuation source, the tax treatment, and the liquidity option you are relying on. Keep a short memo you can show a tax professional without explaining the whole story.