Newcleo is an advanced nuclear energy company developing lead-cooled fast reactor (LFR) small modular reactors (SMRs) fueled with mixed oxide (MOX). The company designs 200 MWe liquid lead-cooled reactors intended to operate on reprocessed nuclear waste, with operations in seven countries including France, Italy, Switzerland, Slovakia, the UK and the United States. Founded by physicist-entrepreneur Stefano Buono, Newcleo is building a vertically integrated business model including design, manufacturing, and deployment capabilities.
Newcleo is publicly traded
This company is no longer available on our private secondary market. Shares can be traded publicly under its listed ticker.
Company data and valuation marks are estimates and may be incomplete, stale, erroneous, or revised.
Founded
2021
Employees
501–1,000
Total Funding
$808.6M
7 rounds
Last Private Valuation
$2.4B
Jul 1, 2026
Completed SPAC merger with NewHold Investment Corp III, raised $247M gross proceeds, began Nasdaq trading as NWCL on Sep 22, 2026.
Newly public equity converts prior private/secondary interest into open-market liquidity.
Closed SPAC merger with NewHold Investment Corp III, raising $247M ($216M PIPE + $31M trust) at $2.4B pre-money; began Nasdaq trading Sept 22 as NWCL.
New Nasdaq listing creates a liquid public market; fresh $247M reduces near-term funding risk.
Received favorable French nuclear safety authority (ASNR) opinion on its planned MOX fuel facility design
De-risks French licensing path, supportive of fuel-supply chain milestone
Funding data and valuation marks are estimates and may be incomplete, stale, erroneous, or revised.
Total raised $808.6M across 7 rounds
Last updated 10-07-2026
| Date | Round | Amount Raised | Valuation | Lead Investors |
|---|---|---|---|---|
| Jul 2026 | Capital raise (pre-listing) | $18.3M | $2.4B *estimated | Not disclosed |
| Apr 2026 | Pre-PIPE subscription | $30.3M | $2.1B *estimated | Not disclosed |
| Feb 4, 2026 | Series A tranche / Series B ($85M) Press release | $85M | — | Not disclosed |
Funding data and valuation marks are estimates and may be incomplete, stale, erroneous, or revised.
Entry · Series A extension / mega-round tranche 1
$1.5B
May 2024
Newcleo today
$2.4B
Jul 2026 · latest mark
Newcleo multiple
1.6x
valuation uplift since first round
Y-axis is logarithmic. Hollow dots = estimated valuations. Does not represent realized investor returns.
Stefano Buono
Co-Founder & Chief Executive Officer
Elisabeth Rizzotti
Co-Founder, Deputy Chief Executive Officer & Chief Operating Officer
Jon Stranske
Group Chief Financial Officer
Luciano Cinotti
Co-Founder & Chief Scientific Officer
Jeffrey Lyash
Chair of the Board of Directors
Andrea Ruben Levi
Non-Executive Director & Chair of the Compensation Committee
Competitor list is illustrative and may be incomplete, stale, or erroneous.
NuScale Power
US-based SMR developer focused on pressurized water reactor small modular reactors; first design certified by NRC
TerraPower
US advanced reactor developer designing sodium-cooled fast reactors (Natrium) with molten salt energy storage
X-Energy
US-based HTGR developer creating high-temperature gas-cooled reactors (Xe-100 design)
Commonwealth Fusion Systems
US-based fusion energy company developing high-field tokamak reactors and ARC commercial demonstration
General Fusion
Canadian advanced nuclear company developing magnetized target fusion technology
Rolls-Royce Small Modular Reactors
UK engineering company developing pressurized water reactor SMRs for grid and industrial heat applications
newcleo closed its business combination with NewHold Investment Corp III (Nasdaq: NHIC) on 21 September 2026, following shareholder approval at NewHold's extraordinary general meeting on 17 September, and the combined company now operates as newcleo plc. Its ordinary shares and warrants began trading on the Nasdaq Global Select Market under the symbols NWCL and NWCLW on 22 September 2026. The transaction valued newcleo at a pre-money equity value of approximately $2.4bn and delivered approximately $247m of gross proceeds, comprising an oversubscribed $216m PIPE and $31m released from NewHold's trust account at closing, with existing newcleo shareholders rolling over 100% of their equity and up to a further $75m potentially available under a previously disclosed forward purchase agreement.
Newcleo shares can be purchased through any standard brokerage account — including Fidelity, Charles Schwab, TD Ameritrade, and online platforms like Robinhood or E*TRADE. Search for the ticker to place an order.
Newcleo had a valuation of approximately $2.4B at the time of its public offering. Current market capitalization fluctuates with the share price.
Newcleo raised $808.6M across 7 disclosed funding rounds prior to its public listing.
Newcleo was co-founded by Stefano Buono, Elisabeth Rizzotti, and Luciano Cinotti in 2021.
Newcleo is headquartered in Paris, France.
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