TerraPower is a private nuclear technology company developing advanced reactors, including Natrium, to deliver safe, affordable, carbon-free energy.[1][2] It is headquartered in Bellevue, Washington, and was founded in 2006 by Bill Gates and others.[1][2]
Access to pre-IPO shares is available to accredited investors through UpMarket.
Latest Price
$5.4B
Series C, Jun 2022, Perplexity
UpMarket Estimate
$4.8B
Based on UpMarket valuation model
Previous Price
$4.0B
Series C Sep 2020
How to Invest in Terrapower Through UpMarket
Terrapower shares are not on public exchanges. UpMarket provides accredited investors access through secondary market transactions.
Step 01
Verify accredited investor status
Confirm eligibility under SEC Rule 501 of Regulation D. Income or net worth threshold applies.
Step 02
Create an UpMarket account
Complete KYC/AML onboarding. Typically 1–2 business days. Licensed rep assigned on signup.
Step 03
Review available Terrapower offerings
Full offering memoranda and risk disclosures provided before any commitment is required.
Step 04
Complete subscription documents
Review and sign subscription agreement. All documents handled digitally through the platform.
Step 05
Fund your investment
Wire transfer or ACH. $50K minimum. Funds held in custodial account until close.
Pre-IPO investments are illiquid, speculative, and involve risk of total loss of capital.
$1.3B+
UpMarket has brokered over $1.3 billion in alternative investments*
*Includes principal invested and appreciation of investments originated via the UpMarket platform based on historical trade volume and valuation estimates through March 31, 2026. Of the total, approximately $301 million is managed by UpMarket Management, with the remaining originated investments managed by affiliates. Past performance is not predictive of future results.
Valuation Growth Over Time
Post-money valuation by round
Previous roundsMost recent
Date
Round
PPS (split-adj.)
Valuation
Jun 2022
Series C
$5.4B
Sep 2020
Series C
$4.0B
Apr 2018
Series B
Terrapower Revenue and Growth
Annual revenue
Why Investors Are Watching Terrapower
Growth Signal
TerraPower secured at least $750M in 2022 raise
TerraPower announced a minimum $750 million equity raise on August 15, 2022, with Credit Suisse serving as exclusive placement agent. The company said the capital would support its advanced nuclear energy work and future funding would come from additional investors.
Product Milestone
Natrium reactor planned for Wyoming coal site
TerraPower plans to build its Natrium reactor near a retiring coal plant in Kemmerer, Wyoming. The project is expected to create thousands of construction jobs and hundreds of permanent jobs once online.
Market Opportunity
US push for next-gen nuclear opens large utility market
The DOE says TerraPower's Wyoming project targets a retiring coal site, showing a pathway to replace aging fossil assets with advanced nuclear power. The agency notes the plant could support local jobs while delivering clean, reliable power.
Interested in Terrapower stock? Fill out the form above or sign up directly. Subject to availability. Accredited investors only.
UpMarket curates and conducts independent diligence on every investment opportunity before it reaches the platform.
Strategy, fees & legal reviewed in full
We review every offering's strategy, risk management, liquidity, fees, valuation methodology, tax matters, and all third-party providers — legal counsel, auditor, administrator, and custodian.
Disciplined managers only
We offer investments exclusively from disciplined managers that pursue unique strategies across an array of asset classes.
Built around your objectives
Our goal is to empower you to build a portfolio that best meets your individual investment objectives.
No. As of March 2026, Terrapower is a private company and does not trade on any public stock exchange. Accredited investors can access Terrapower shares through UpMarket, a FINRA-registered broker-dealer that specializes in pre-IPO investments.
Terrapower does not have a public stock price because it is privately held. The most recent known share price comes from its last funding round. Pre-IPO share prices on the secondary market may differ from the last round price depending on supply, demand, and market conditions.
Yes. Accredited investors can indicate interest in Terrapower shares through UpMarket by filling out the form on this page or creating an account at upmarket.co. All pre-IPO offerings are subject to availability and require a $50,000 minimum investment. UpMarket is a FINRA-registered broker-dealer and has brokered more than $500M in alternative investments since 2019.
Pre-IPO investments carry significant risks. Terrapower shares are illiquid, meaning there is no public market to sell them quickly. There is no guaranteed exit timeline or return. The investment is speculative in nature, and investors should be prepared for the possibility of total loss. Valuations of private companies can fluctuate substantially between funding rounds. Investors should consult their financial advisor and review all offering documents before investing.
In a pre-IPO transaction, accredited investors purchase shares from existing shareholders (such as employees, early investors, or other holders) through secondary market platforms. The company itself does not issue new shares in these transactions. UpMarket facilitates these trades as a FINRA-registered broker-dealer, handling compliance, documentation, and settlement on behalf of both parties.
There are two primary exit paths for pre-IPO holdings: selling your shares on the secondary market to another buyer, or holding until the company completes an IPO or is acquired. Both paths are subject to transfer restrictions, company approval (right of first refusal), and market conditions. The timing of any exit is unpredictable, and investors should plan for a multi-year holding period.
The minimum investment for most pre-IPO offerings on UpMarket is $50,000. This amount may vary depending on the specific offering and share availability. There are no fees to create an UpMarket account or browse available investments. Investors only pay transaction-related fees when they complete an investment.
UpMarket's valuation estimate of is derived from a proprietary model that incorporates multiple data sources: funding round data (Caplight), revenue estimates (Sacra), secondary market pricing, and public company comparables. The model applies a private company discount to the public comp multiple to account for illiquidity and information asymmetry. This estimate is not investment advice and may differ substantially from the price at which shares actually trade.
TerraPower is a private nuclear technology company developing advanced reactors, including Natrium, with $369.1M in 2024 revenue and a $4.8B valuation, following at least $750M raised in 2022 — accredited investors can access Terrapower stock through UpMarket.