Swedish Reactor Developer Blykalla Opens New York Office, Targets US Market

Blykalla AB, the Stockholm-based developer of the SEALER lead-cooled fast reactor, opened a U.S. office in New York and told the Baltic Nuclear Energy Forum that it is now a "transatlantic company," CEO Jacob Stedman confirmed. The move marks a concrete pivot toward the American market, driven by what Stedman described as a manufacturing base opportunity and booming hyperscaler demand.

The centerpiece of that pivot is a strategic partnership with Santa Clara-based Oklo Inc. (NYSE: OKLO), announced jointly by the two companies. The agreement covers technology collaboration, supply-chain coordination, and regulatory knowledge-sharing, and includes Oklo co-leading Blykalla's A2 investment round through an approximately $5 million commitment.

Stedman framed the alliance in bluntly commercial terms. "Oklo and Blykalla share a practical, industrial approach to bringing advanced fission to market," he said. "Coordinated component sourcing and targeted joint R&D can unlock efficiencies for both companies and help our suppliers plan for scale, regardless of which side of the Atlantic they are on."

The two companies bring complementary reactor technologies to the table. Blykalla's SEALER is a passively safe, 55 MWe lead-cooled fast reactor built on more than 25 years of research, and Blykalla's press materials cite the OECD Nuclear Energy Agency's annual SMR dashboard as ranking it the most mature advanced reactor concept in Europe. Oklo, meanwhile, is developing sodium-cooled fast-reactor powerhouses of up to 75 MWe, targeting deployment at U.S. sites for industrial, defense, and data-center customers. The data-center angle is not incidental: Blykalla has also separately signed a memorandum of understanding on nuclear-powered data centers, aligning with the hyperscaler demand Stedman identified as a key driver of the U.S. push.

Blykalla enters the American market with established industrial backing. Uniper, ABB, and KSB are among its named partners and supporters, and the company has previously raised $50 million to accelerate SEALER development.

The Oklo partnership sits within a broader web of transatlantic capital formation. In October 2025, Oklo and European reactor developer newcleo announced a joint agreement to build advanced fuel fabrication and manufacturing infrastructure in the United States, with newcleo planning to invest up to $2 billion through an affiliated investment vehicle. Blykalla disclosed it is also considering co-investing in that project and procuring fuel-related services from it, though that participation remains conditional on further decisions.

Oklo's $5 million co-lead commitment in Blykalla's A2 round is a comparatively modest figure, but the strategic weight of a NYSE-listed U.S. advanced nuclear company anchoring a European developer's fundraise signals the kind of allied alignment that the advanced fission sector has struggled to formalize. For Blykalla, a New York address and an American institutional co-investor on the cap table is as direct a statement of intent as any press release.