Contact.
Contact
STAND 08/2026
One inbox, read by people who know the buildings. Say which of these you are, and the right person answers.
Who is writingOne inbox. Say which of these you are.
Every door below opens the same address – the subject line is what routes it, and a named person answers rather than a queue.
office@blackvault.global
Where we areOne company, two buildings.
The company is registered in London. The buildings are in the Harz, and both can be visited.
Registered office
12 Elements Ltd
12 Mulberry Place, Pinnell Road
London SE9 6AR
United Kingdom
Companies House · Reg. no. 15412509
The sites
Harz, Saxony-Anhalt
Michaelsteiner Straße 28a · Blankenburg (Harz) Klopstockweg 10a · QuedlinburgBoth sites are in the Harz. The Cube has an address and a parcel; its coordinate pair is not published.
Before you writeFour figures, and we can answer properly.
There is no chat window and no demo booking on this site. An enquiry that carries these four is answered by an engineer, not by a form.
Anything shorter is welcome too. These four simply mean the first answer is useful rather than a request for the same four.
- 01LoadIT load in MW, and whether that is day one or the end state.
- 02DateWhen the capacity has to be live. Month and year.
- 03DensitykW per rack. It decides air or liquid, and it decides the building.
- 04JurisdictionWhere the data must stay, and under whose law.
- 1–3 MW
- The Cube in Quedlinburg, or a BlackKub in an existing building. Waitlist.
- 5 MW and above
- Campus engineering. A named engineer answers.
- Sovereign or public sector
- A separate owner, and a separate conversation.
Two ways in.
Black Vault raises per project, not into the holding. Which door is yours depends on ticket size and regulation – the discipline behind both is the same.
Institutional & enterprise
One project company per building or campus. The holding has already seeded each with its own pre-FEED capital before external money is asked for.
- Capital invests into the project SPV, never into the holding
- The full engineering record is in the data room, under NDA
- Campus exits: spec-built sale to a single buyer
Private investors
A private layer is planned. It is not open today, and nothing on this site is an offer – leave a contact and you hear from us when it is real, together with the documents that make it real.
- No self-serve investment today
- No published terms until regulated documents exist
- Contact first, prospectus later
Nothing on this page constitutes an offer of securities, investment advice or a solicitation. Any participation happens exclusively on the basis of executed agreements and, where required, regulated documents.
Book a visit.
The building stands and can be walked into. Exhibition at grade, the machine behind glass one floor up.
Talk to us.
Investors, compute demand, authorities – one address, answered by someone who knows the building.
→Write to us
