Government programmes, public services and strategic infrastructure.
Six companies from the Active and Pending books on Silverstein Ventures have documented government, public-service or publicly supported space activity. Archived and defunct entries are excluded. Each relationship is described with its source and scope.
Five entries are active holding records. WHOOP is a pending two-share allocation and is not presented as a settled holding. The source portfolio was checked on 10 October 2026 and reviewed here on 17 October 2026.
Active holdings and pending allocations
| Name | Stock | Shares |
|---|---|---|
| SenActive · Crowdcube | Private companySpace infrastructure | 70 |
| What 3 WordsActive · Crowdcube | Private companyEmergency response | 26 |
| MacReburActive · Republic Europe | Private companyRoad infrastructure | 1 |
| ShackletonActive · Crowdcube | Private companyMilitary apparel | 2 |
| SeafieldsActive · Crowdcube | Private companyCoastal resilience | 4 |
| WHOOPPending · Republic Europe | Private companyOperational readiness | 2 pending |
Sen’s SpaceTV-1 payload uses a commercial hosting agreement with Airbus on the ISS, supported by the ISS National Laboratory. The platform is attached to ESA’s Columbus module and installation scheduling involves NASA. This does not establish a direct NASA or ESA procurement contract with Sen.
Government or company source ↗ · Portfolio source ↗what3words documents adoption by emergency services and Transport for London for communicating precise operational locations. Public-service use is distinct from disclosure of a specific paid government contract.
Government or company source ↗ · Portfolio source ↗Enfield Council’s 14 February 2018 announcement records a trial of MacRebur’s asphalt additives on Green Dragon Lane and further trial funding from Transport for London. This is a documented historical public-road project, not confirmation of a current contract.
Government or company source ↗ · Portfolio source ↗Shackleton states that it supplies performance apparel to the British military and works with the Ministry of Defence. Its investor information describes equipment for polar operations. The reviewed source does not specify contract value or procurement terms.
Government or company source ↗ · Portfolio source ↗Seafields reports partnerships with Caribbean governments and collaboration with public agencies on responsible Sargassum management. This supports coverage of coastal resilience; no named government contract value is established by the reviewed statement.
Government or company source ↗ · Portfolio source ↗WHOOP announced a contract with MIT Lincoln Laboratory on 27 April 2026 under US Navy sponsorship for the Command Readiness, Endurance, and Watchstanding programme. The disclosed agreement supports wearable-platform integration; SNDI’s two-share allocation remains pending.
Government or company source ↗ · Portfolio source ↗Additional active or pending entries will be included when their government or public-service activity is supported by a source.