X Energy stock
Private-market facts for current and former X Energy employees researching their stock.
Overview
Advanced nuclear reactor company developing the Xe-100 high-temperature gas-cooled reactor and TRISO-X fuel fabrication facility for clean baseload power generation.
X Energy outlook
For employees evaluating X Energy equity, a 22x base multiple suggests meaningful potential return on equity granted at current levels. The upside scenario at 34x is relatively close to the base case, suggesting more predictable but narrower range of outcomes.
These estimates reflect modeled return scenarios, not guaranteed outcomes. Actual results depend on company performance, market conditions, share class, and timing.
Selling X Energy shares
Why shareholders consider selling
Shareholders in X Energy may explore liquidity for a number of reasons — diversifying a concentrated position, funding a personal financial goal, or simply reducing exposure to a single private holding. Although X Energy is listed as public, holders of older share classes or pre-IPO grants may still face liquidity constraints. Extended private timelines can leave shareholders waiting years for an exit event, which is why some choose to explore secondary-market options.
Can you sell X Energy stock?
Whether a shareholder can sell typically depends on what they hold and how it was acquired. Vested and exercised shares are generally more straightforward than unexercised options or unvested RSUs. Most private companies, including those in the Clean Energy & Climate sector, impose transfer restrictions such as rights of first refusal or board approval requirements. The specific terms governing X Energy shares would be outlined in the holder's equity agreement or the company's governing documents.
What affects the value of X Energy shares?
The price a buyer is willing to pay for private shares is shaped by several factors: overall demand for the stock, the company's financial performance, broader Clean Energy & Climate market conditions, and any recent private-market transaction activity. Data points such as the company's SPAC round and its reported $3B valuation can help frame expectations, though they do not guarantee a transaction price.
What should holders check before selling
- The type of security held (common shares, preferred, options, RSUs)
- Whether the equity is fully vested and, for options, whether it has been exercised
- Any transfer restrictions, lock-up provisions, or company approval requirements
- Estimated net proceeds after applicable taxes and transaction fees
- Whether partial liquidity — selling a portion rather than the full position — may be a better fit
Tools for X Energy shareholders
Exploring equity in X Energy often raises questions about taxes, exercise timing, valuation, and exit outcomes. These tools can help you model different decisions using your own assumptions.
Latest funding round
X Energy most recently raised a SPAC round . The company was valued at $3B. Total funding raised to date is approximately $700M.
Lead investors in this round include Ares Management.
X Energy funding history
| Date | Round | Amount | Lead investors |
|---|---|---|---|
| Nov 2024 | Post | $1.20B | — |
| Oct 2023 | Grant | $100M | US Department of Energy |
| Sep 2023 | Grant | $70M | US Department of Energy |
| May 2023 | Grant | $20M | Breakthrough Energy Ventures |
Founders & company background
X Energy was founded in 2009 by Kam Ghaffarian and is headquartered in Rockville, MD.
Investors
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Latest X Energy news
Frequently asked questions
- Is X Energy a public or private company?
- X Energy is currently listed as public. Depending on when you received your equity, your shares may be subject to different rules than publicly traded stock.
- What is X Energy's valuation?
- X Energy's latest reported valuation is $3B, set during its SPAC round. This is the preferred-stock valuation — the price per share that employees hold (common stock) is typically lower due to the liquidation preference stack. See our glossary entries on pre-money valuation and common stock for more detail.
- What is X Energy's stock price per share?
- X Energy does not trade on a public exchange, so there is no single live stock price. Indicative pricing may be available through secondary-market platforms. The most recent known valuation data ($3B) can help frame expectations, but common shares typically trade at a discount to the headline preferred-stock valuation.
- When will X Energy IPO?
- X Energy has not announced a confirmed IPO date. IPO timing depends on market conditions, company financials, and board decisions. Employees should plan around the possibility that liquidity may take years and consider whether secondary-market options or company-sponsored tender offers are available in the interim.
- Can I sell my X Energy stock?
- It depends on what you hold and your company's policies. Vested, exercised shares are generally eligible for secondary-market sales, subject to X Energy's transfer restrictions and right of first refusal (ROFR). Unexercised options and unvested RSUs typically cannot be sold. Some companies also run periodic tender offers that allow employees to sell a portion of their holdings at a set price. Check your equity agreement or speak with your stock plan administrator for X Energy-specific rules.
- How much does it cost to exercise X Energy stock options?
- The out-of-pocket cost equals your strike price multiplied by the number of shares you exercise. For ISOs, exercising may also trigger the Alternative Minimum Tax (AMT) based on the spread between your strike price and the current fair market value. For NSOs, the spread is taxed as ordinary income at exercise. Use our AMT Calculator and Stock Option Tax Calculator to model the cost for your specific situation.
- What type of stock options does X Energy grant — ISOs or NSOs?
- Most venture-backed companies grant ISOs (Incentive Stock Options) to U.S. employees where possible, with NSOs (Non-Qualified Stock Options) used for amounts exceeding the $100K annual ISO limit, for contractors, or for non-U.S. employees. Your specific grant type is listed in your option agreement. The distinction matters because ISOs can qualify for long-term capital gains treatment, while NSOs are taxed as ordinary income at exercise. See our ISO guide and NSO guide for the full breakdown.
- What happens to my X Energy stock if the company is acquired?
- In an acquisition, your equity outcome depends on the deal structure and your grant terms. Common scenarios include cash-out (your shares are bought at a set price per share), rollover (your shares convert into the acquirer's equity), or cancellation with an acceleration clause. If you have double-trigger acceleration, your unvested shares may accelerate only if you are also terminated. The liquidation preference stack determines how proceeds are divided — preferred shareholders are paid first, which can reduce or eliminate the payout to common shareholders in lower-value exits.
- What is the difference between common and preferred X Energy stock?
- Employees typically hold common stock (or options on common stock). Investors hold preferred stock, which usually comes with a liquidation preference — meaning investors get paid first in an exit before common shareholders receive anything. X Energy's $3B headline valuation reflects the preferred-stock price. The fair market value of common shares (used for your 409A and strike price) is typically 25–50% lower. This distinction is critical when estimating what your shares might actually be worth in an exit.
- What happens to my X Energy options if I leave?
- When you leave a company, you typically have a limited post-termination exercise window — often 90 days — to exercise your vested options or they expire worthless. Some companies offer extended windows (up to 10 years). Unvested options are forfeited. If you hold ISOs and don't exercise within 90 days of leaving, they convert to NSOs, which changes the tax treatment. Review your option agreement for X Energy's specific terms, and use our Exercise Timing Planner to model the financial tradeoffs.
Related pages
Last verified: 2026-05-28 · X Energy data compiled from funding disclosures, investor announcements, corporate filings, and public records.
Information on this page is compiled from publicly available sources and may be outdated or incomplete. This is not investment advice. Consult a qualified advisor before making financial decisions.