Newcleo

Overview

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• TickerNWCL on Nasdaq¹
• IndustryFabricated Plate Work (Boiler Shops)¹
• HeadquartersX0¹
• Websitewww.newcleo.com
• Incorporated inUnited Kingdom⁵
• Business address55 South Audley Street, London, W1K 2Qh⁵

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newcleo is a European nuclear energy company developing small modular lead-cooled fast reactors using mixed oxide fuel (MOX). Headquartered in Paris and founded in 2021, as of May 2026 newcleo has raised over €780 million in capital.³

The story

Founded by Stefano Buono on Sep 2021.¹

Leadership

Who has led Newcleo, and when. Pick a name to see everywhere that person has worked.

• FounderStefano Buono¹
• Chief executive officerElisabeth Rizzotti Sep 21, 2026 to now⁶
• Chief executive officerStefano Buono Sep 21, 2026 to now⁷
• Chief financial officerJon Stranske Sep 21, 2026 to now⁸
• Chief operating officerElisabeth Rizzotti Sep 21, 2026 to now⁶

Former names

• newcleo Ltd.May 27, 2026 to Sep 4, 2026⁵

Timeline

1. Sep 21, 2026New chief executive Stefano Buono becomes CEO⁷
2. Sep 21, 2026New chief executive Elisabeth Rizzotti becomes CEO⁶
3. Sep 2021Founded Founded¹

Calendar

Coming up

1. Nov 11, 2026Reports results for the quarter ending Sep/2026¹⁷

Upcoming dates from Nasdaq's calendar; past results from the company's 8-K filings (Item 2.02). The full markets calendar

Filings

60 filings to the SEC since October 2021: 18 insider forms, 2 large holders, 40 other. The latest 20:

1. Oct 15, 2026SCHEDULE 13G EDGAR
2. Oct 15, 2026SCHEDULE 13G EDGAR
3. Oct 14, 20266-K EDGAR
4. Oct 6, 2026F-1 EDGAR
5. Oct 6, 20266-K EDGAR
6. Oct 5, 20266-K EDGAR
7. Sep 30, 20266-K EDGAR
8. Sep 28, 20263/A EDGAR
9. Sep 25, 20266-K EDGAR
10. Sep 23, 20264 EDGAR
11. Sep 23, 20264 EDGAR
12. Sep 23, 20264 EDGAR
13. Sep 23, 20264 EDGAR
14. Sep 23, 20264 EDGAR
15. Sep 23, 20264 EDGAR
16. Sep 23, 20264 EDGAR
17. Sep 23, 20266-K FORM 6K EDGAR
18. Sep 22, 2026S-8 EDGAR
19. Sep 21, 2026CERT EDGAR
20. Sep 21, 20268-A12B EDGAR

Every filing from the last five years, summarized. The full record is on SEC EDGAR.

Major holders

Investors who own more than 5% of the shares must tell the SEC: a 13D if they may seek to influence the company, a 13G if they hold passively.

2 such filings since October 2021:

1. Oct 15, 2026SCHEDULE 13G
2. Oct 15, 2026SCHEDULE 13G

SEC filer profile

How Newcleo is registered with the Securities and Exchange Commission, from its EDGAR record and the cover page of its latest annual report.

• Name on EDGARnewcleo plc²
• CIK0002131813
• Incorporated inUnited Kingdom²
• Fiscal year endsDecember 31²
• Industry code (SIC)3443 Fabricated Plate Work (Boiler Shops)²
• SEC reviewing officeOffice of Manufacturing, Division of Corporation Finance²
• Business address55 South Audley Street, London, W1K 2QH, United Kingdom²
• Phone44(0) 79908 84284²
• On EDGAR sinceMay 27, 2026²
• Filings60 in all: 425 (24), 3 (10), 4 (7), 6-K (6), F-4/A (2), SCHEDULE 13G (2), 3/A (1), 424B3 (1)²
  All 15 form types

  8-A12B (1), CERT (1), DRS (1), EFFECT (1), F-1 (1), F-4 (1), S-8 (1)

Links

• Websitewww.newcleo.com¹
• X (Twitter)x.com/newcleoenergy¹
• YouTubewww.youtube.com/channel/UCXs9HNpORDIvRfNyWK4gxlA¹
• LinkedInwww.linkedin.com/company/newcleo¹
• WikipediaNewcleo
• WikidataQ119702626
• SEC EDGARCIK 2131813