On 7 July 2026 OCCAR and a4ESSOR signed a contract amendment that raised the declared overall value of the ESSOR programme to more than €211 million, added a narrow-band waveform based on the future NATO standard STANAG 5630 Edition 2, and committed the programme to build a central reference laboratory for interoperability testing and validation. Eight months earlier the same parties had contracted the deployment stage of the existing high data rate waveform for more than €47 million, with security qualification of the national implementations still to be performed and initial operational capability described as having commenced in some nations only. Against those two figures stand the approximately €100 million total value of the amended Operational Capability 1 contract of 2020 and the approximately EUR 25.6 million that Finland committed in a single serial radio order in November 2024. Europe’s rearmament is becoming progressively more dependent on software-defined communications whose useful life is governed less by the physical radio than by the software, interfaces, security approvals, configuration data and rights needed to modify them. A radio can be manufactured in Europe and still leave its customer dependent on a supplier for waveform changes; a common European waveform can improve coalition interoperability without giving each participating government an independent design authority; a NATO standard can remove an interoperability barrier while leaving source code, qualification artefacts and cryptographic responsibilities elsewhere. The question those two contracts leave open is not whether Europe has tactical-radio manufacturers, but whether European states can control the successive layers through which a common communications specification becomes an accepted, configurable, supportable and evolvable military capability.
This report examines that question across the successive layers of control — specification, software, national port, configuration, qualification, security and sustainment — and tests them against three bodies of evidence. The first is the programme record: OCCAR’s ESSOR programme pages and technical-document set, its announcements of NATO ratification in October 2023, of the Stage 4 contract in November 2025 and of the July 2026 amendment, and the publicly released overview of the ESSOR architecture. The second is the legal perimeter: Council Decision (CFSP) 2025/1107 and the project’s own PESCO record, Regulation (EU) 2021/697 as amended and consolidated in 2024, and Regulation (EU) 2025/2643. The third is the national and corporate record: Bittium’s stock exchange releases and financial statement bulletin, the programme disclosures of Rohde & Schwarz and Leonardo, the French Ministry of the Armed Forces’ description of CONTACT/SYNAPS, and the ESSOR-MIDS 2 contract signed on 6 July 2026. The report does not attempt a country-by-country sovereignty ranking, does not estimate an installed base of ESSOR-enabled terminals, and does not infer component-level dependency from the absence of named suppliers in programme material. Where the contractual allocation of source code, technical data and requalification rights is not public, it says so rather than reconstructing it.