Key Highlights

● newcleo plc completed its Business combination with NewHold Investment Corp III on September 21, 2026.

● Ordinary shares and public warrants began trading on Nasdaq the next day under tickers NWCL and NWCLW.

● The Merger closed through two Cayman Islands subsidiaries before newcleo converted to an English public company.

● Class B shares convert to ordinary shares once the stock trades at $15.00 and later $18.00 over set periods.

Nuclear-technology company newcleo plc (NASDAQ:NWCL) completed its business combination with special purpose Acquisition company NewHold Investment Corp III on September 21, 2026, with its ordinary shares and public warrants beginning to trade on the Nasdaq Global Market the following day under the tickers NWCL and NWCLW, according to a Form 6-K filed September 25, 2026.

Closing the Merger

The transaction closed through two Cayman Islands merger subsidiaries, newcleo1 Ltd. and newcleo2 Ltd., combining with NewHold Investment Corp III. Following the close, newcleo plc, previously a private company known as newcleo Ltd., converted into a Public Limited Company under English law, with its registered office at 55 South Audley Street, London. The filing notes newcleo now reports to the SEC as a Form 20-F filer under commission file number 001-43479, the standard filer classification for a foreign private issuer. Using merger subsidiaries incorporated in the Cayman Islands to complete the combination is a structure commonly used in SPAC transactions involving a non-U.S. target company, allowing the deal to close under a jurisdiction's corporate law suited to the transaction's mechanics.

Trading Begins the Next Day

The 6-K states plainly: "Beginning on September 22, 2026, the Company's ordinary shares and public warrants commenced trading on the Nasdaq Global Market under the symbols 'NWCL' and 'NWCLW', respectively." That one-day gap between the September 21 closing and the September 22 trading start is a routine part of finalizing a SPAC merger's exchange listing mechanics.

Leadership and Governance After the Merger

The filing names newcleo's post-merger executive team: Stefano Buono, 60, as Chief Executive Officer and Director; Elisabeth Rizzotti, 60, as Deputy CEO, Chief Operating Officer and Director; and Jon Stranske, 47, as Group Chief Financial Officer. Six non-executive directors were also appointed to the board: Anne-Francois de Bourdoncle de Saint Salvy, Raffaele Petrone, Andrea Ruben Osvaldo Levi, Manfredi Lefebvre d'Ovidio de Clunieres di Balsorano, Suzy Taherian and Heinz Maeusli.

Warrant and Share-Class Terms

Alongside the closing, newcleo executed an Amended and Restated Articles of Association, a Warrant Termination, Assignment, Assumption and Amendment Agreement naming Computershare as successor warrant agent, and an Amended and Restated Registration Rights Agreement covering the resale rights of newcleo securityholders, referencing the underlying Business Combination Agreement originally dated May 26, 2026. Separately, newcleo's Articles establish a five-year conversion schedule for its Class B shares: half convert to ordinary shares once the stock trades at $15.00 for 20 out of any 30 trading days, and the remaining half convert once it reaches $18.00 under the same 20-of-30-day test, with an alternate conversion path if a merger or similar transaction happens first.

What the Filing Does Not Say

This 6-K does not itself include a description of newcleo's nuclear technology business or products; investors seeking that detail would need to consult the company's separate prospectus or business combination disclosures. The document is focused on confirming the transaction's completion, the resulting corporate structure, warrant arrangements and registration rights rather than describing operations. Its Form 20-F filer status means newcleo will follow the periodic reporting schedule used by non-U.S. companies listed on a U.S. exchange, rather than the quarterly Form 10-Q cadence used by domestic issuers.

Thresholds That Will Shape the Share Count

Watch how newcleo's share price performs against the $15 and $18 thresholds that govern its Class B share conversions over the coming five years, since those price levels determine when early investors' Class B shares convert into ordinary shares. Investors should also watch for newcleo's first post-merger periodic report as a Form 20-F filer, which would be the venue for a fuller description of its nuclear technology business and financial position. The five-year conversion window itself runs from the September 21, 2026 closing date, giving a clear outer boundary for when the alternate, transaction-based conversion path would otherwise apply.