Collaboration to focus on satellite technology transfer, in-country assembly, integration and test capability, and workforce development

CAPE CANAVERAL, Fla., Sept. 17, 2026 /PRNewswire/ -- Sidus Space, Inc. (NASDAQ: SIDU), (the "Company" or "Sidus"), an innovative space and defense technology company, today announced the signing of a non-binding Memorandum of Understanding ("MOU") with 3GM Plus, a Slovenian company headquartered in Ljubljana, to collaborate on satellite manufacturing, technology licensing, and the establishment of a domestic small satellite capability in Slovenia. The MOU was signed in Paris during World Space Business Week.

Under the MOU, 3GM Plus will serve as prime contractor for Slovenian satellite programs, with Sidus supporting as subcontractor providing satellite bus technology and licensing, engineering development and knowledge transfer, and flight-proven hardware including the Company's Fortis VPX Maxima digital mission computing platform. 3GM Plus selected Sidus based on the Company's demonstrated space heritage, including the design, manufacture, and on-orbit operation of its LizzieSat satellites.

"Europe is investing in sovereign space and defense capability at a pace we haven't seen before, and Slovenia has decided to build that capability rather than buy it," said Carol Craig, Founder, Chief Executive Officer and Chairman of Sidus Space. "That plays directly to how Sidus is structured. We can license technology, supply Fortis VPX Maxima and key subassemblies, and support Slovenia's own build instead of only delivering a finished spacecraft. Our objective here is to be a long-term partner in a national program, not a one-time supplier."

The parties anticipate a phased approach in which Sidus supports initial satellite development at its Cape Canaveral, Florida facility, with Slovenian engineering personnel participating directly in the build, followed by the establishment of assembly, integration and test capability in Slovenia. 3GM Plus would lead the development of that facility, applying its experience in the design and construction of cleanroom and controlled-environment systems to satellite manufacturing requirements.

The MOU further details structured knowledge transfer to Slovenian personnel, including hands-on engineering participation, onsite support during integration, and training for defense and civil mission operations.

Slovenia has the engineering talent and the industrial base to support a national satellite program, but not the flight experience," said Jure Milošević, Chief Executive Officer of 3GM Plus. "We selected Sidus because they have designed, built, and flown their own satellites. That heritage is what allows us to establish this capability in Slovenia on a credible timeline rather than starting from the beginning. Our objective is for Slovenia to become a producer within the European space supply chain, not only a customer."

About Sidus Space

Sidus Space, Inc. (NASDAQ: SIDU) is a vertically integrated space and defense technology company delivering satellite manufacturing and technology integration across all orbits, including LEO, GEO and lunar; all domain digital mission computing solutions; mission planning and management operations; AI enabling products and services; and space and defense hardware manufacturing. With its mission of Space Access Reimagined®, Sidus Space is committed to rapid innovation, adaptable solutions, and the optimization of space systems and data collection performance. With demonstrated space heritage, including designing, manufacturing and operating its own satellite and sensor system, LizzieSat®, Sidus Space serves government, defense, intelligence, and commercial customers around the globe. Strategically headquartered on Florida's Space Coast, Sidus Space operates a 35,000-square-foot space manufacturing, assembly, integration, and testing facility with direct access to nearby launch facilities.

About 3GM Plus

3GM PLUS d.o.o. is a Ljubljana, Slovenia-based provider of turnkey controlled-environment solutions, specializing in the design, construction, installation, and validation of cleanrooms and ultra-clean air ventilation systems for industries including pharmaceuticals, biotech, microelectronics, and research. Drawing on many years of experience, the company delivers solutions meeting ISO, GMP, FDA, and other applicable regulatory standards. For more information, visit: 3gmplus.com.

Forward-Looking Statements

Statements in this press release about future expectations, plans and prospects, as well as any other statements regarding matters that are not historical facts, may constitute 'forward-looking statements' within the meaning of The Private Securities Litigation Reform Act of 1995. These statements include, but are not limited to, statements relating to the expected trading commencement and closing dates. The words 'anticipate,' 'believe,' 'continue,' 'could,' 'estimate,' 'expect,' 'intend,' 'may,' 'plan,' 'potential,' 'predict,' 'project,' 'should,' 'target,' 'will,' 'would' and similar expressions are intended to identify forward-looking statements, although not all forward-looking statements contain these identifying words. Actual results may differ materially from those indicated by such forward-looking statements as a result of various important factors, including: the uncertainties related to market conditions and other factors described more fully in the section entitled 'Risk Factors' in Sidus Space's Annual Report on Form 10-K for the year ended December 31, 2025, and other periodic reports filed with the Securities and Exchange Commission. Any forward-looking statements contained in this press release speak only as of the date hereof, and Sidus Space, Inc. specifically disclaims any obligation to update any forward-looking statement, whether as a result of new information, future events or otherwise.

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SOURCE Sidus Space, Inc.