Private company · employee equity guide

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What is TerraPower stock worth?

TerraPower is a leading nuclear innovation company that strives to improve the world through nuclear energy and science. TerraPower’s innovators create technologies to provide safe, affordable and abundant carbon-free energy. They devise ways to use heat and electricity to drive economic growth while decarbonizing industry. And they develop processes to extract radioisotopes for medical use in lifesaving cancer treatments.We’re proud of our culture of mission-driven innovation. Our employees develop clean, safe energy to address climate change and global poverty, and drive medical advances for

Estimated share price

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TerraPower has an observed estimated price: most recent data 2026-09-15, daily history back to 2024-06-22.

Estimated from live trades and accepted bids across employer liquidity programs, institutional trades, broker trades, and pre-IPO marketplaces. Private shares are illiquid and transfer-restricted; estimates are educational, not an offer or advice. The preview above is blurred and illustrative. How this is calculated

About TerraPower

Employees
1,069
Founded
2006
Industry
Nuclear Electric Power Generation, Electric Power Generation, Utilities
Website
terrapower.com

Weighing a TerraPower offer?

Upload the offer letter to see what the equity is approximately worth at today's estimated price. No account needed.

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Leaving TerraPower? Mind the window.

If you hold options, leaving usually starts a post-termination exercise clock, often 90 days. Miss it and vested options can expire worthless; exercise blindly and you may owe real money (including possible AMT) on shares you can't yet sell. Neither panic nor autopilot is a plan. Knowing your window, your exercise cost, and the current estimated price is.

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TerraPower in the last 12 months

  • 1 funding round
  • 1 lawsuit or investigation

Covered by 19 distinct publications since 2026-03-04.

TerraPower news timeline

Reported before TerraPower’s latest mark

A mark records a completed transaction, so it reflects what buyers and sellers knew several weeks before it printed. These stories were published in that window. They are shown in sequence, not as an explanation of the mark.

TerraPower equity, answered plainly

Is TerraPower a public company?

No. TerraPower is privately held, which is exactly why its share price doesn't show up in your brokerage app. The company (founded in 2006, operating in nuclear electric power generation, with roughly 1,069 employees) remains private even at that scale. Its shares still change hands between eligible buyers and sellers on the secondary market, producing an observable estimated price.

What is TerraPower's stock price?

TerraPower has an observed estimated share price from secondary-market activity, updated as new data is observed. Its observed price history runs back to 2024-06-22. ExitCue members see the current estimate and its full history free, along with what their own grants are approximately worth at that price.

Can you sell TerraPower stock before an IPO?

Sometimes. Private-share sales depend on TerraPower's transfer restrictions, rights of first refusal, and whether the company runs tender offers or permits secondary sales. Your grant documents and the company's policies govern, but "hard to sell today" is not the same as "worth zero."

What happens to my TerraPower options if I leave?

Most option grants have a post-termination exercise window, commonly 90 days, sometimes longer, after which unexercised options expire worthless. The exact terms are in your grant documents. ExitCue reads those documents, tracks the deadline, and reminds you before the window closes.

How much is my TerraPower equity worth?

Multiply what you hold by the estimated share price, separating vested from unvested, and netting out strike prices for options. That's precisely the arithmetic ExitCue does for you, continuously, at the current observed estimate. It's an educational estimate, not a guarantee, and a far better anchor than the $0 the internet suggests.

What's the difference between TerraPower's 409A valuation and what its shares trade at?

The 409A is a tax-compliance appraisal, usually conservative, used to set option strike prices. Secondary-market pricing reflects what buyers and sellers actually agree to. The two frequently differ, which is why evaluating an offer on the 409A alone undersells (or oversells) it.

When will TerraPower IPO?

Unless TerraPower has publicly announced a listing, nobody knows, including the people who sound confident on forums. The practical upside of secondary markets is that you don't have to wait for an IPO to know approximately what the shares trade at.

Do my unvested TerraPower RSUs count for anything?

Unvested equity isn't yours yet, but it has an estimable value and a schedule. Seeing vested and unvested value separately, in dollars at the current estimated price, turns "some RSUs" into a number you can plan around.

General educational information, not advice about your specific situation. Grant terms vary; your documents govern.

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