Registered 15. juuli 2026, primary activity: Research and experimental development on natural sciences and engineering. Main place of business in Kesklinna linnaosa, Tallinn, Harju maakond.
| Year | Revenue (a) | State taxes | Taxes on workforce | Employees (Q4) |
|---|---|---|---|---|
| 2026 | — | – | – | 3 |
| Year | Q1 | Q2 | Q3 | Q4 |
|---|---|---|---|---|
| Revenue 2026 | – |
Altenburg Infra OÜ is connected to 10 other companies through 1 person who hold a role here and elsewhere. The strongest tie runs through Marko Virkebau (10 companies).
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| – |
| – |
| State taxes 2026 | – | – | – | – |
| Taxes on workforce 2026 | – | – | – | – |
| Employees 2026 | – | – | 3 | – |
| Company | Role | Reg. code |
|---|---|---|
| Altenburg OÜ | Board member | 17174619 |
| Frankenburg Technologies OÜ | Supervisory board member | 16901751 |
| Marhen OÜ | FounderShareholder 50%Board member | 14081344 |
| MarkeDroid OÜ | Supervisory board member | 16720512 |
| Marko Capital OÜ | FounderShareholder 100%Board member | 14307363 |
| OÜ Stargate Hydrogen | Board member | 16191501 |
| OÜ Stargate Hydrogen Solutions | Board member | 16193521 |
| Sirbi investeeringud OÜ | Board memberShareholder 20%Founder | 16616200 |
| SPM Advisory OÜ | Board memberFounderShareholder 50% | 16187325 |
| Wolfram Europa OÜ | Supervisory board member | 17281768 |