---
title: "O3 Inseneribüroo OÜ — Ownership Dossier"
canonical: https://whiteintel.dev/entity/363ae3c2-d7cf-5c82-a0db-c68e57817580
json: https://whiteintel.dev/api/public/dossier/363ae3c2-d7cf-5c82-a0db-c68e57817580
identifier: ee-regcode:12321790
jurisdiction: EE
source: WhiteIntel corporate-ownership graph
---

# O3 Inseneribüroo OÜ

**Type:** Company  
**Jurisdiction:** EE  
**Identifier:** `ee-regcode:12321790`  
**Canonical dossier:** https://whiteintel.dev/entity/363ae3c2-d7cf-5c82-a0db-c68e57817580  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/363ae3c2-d7cf-5c82-a0db-c68e57817580  

## Registry profile

- **Status:** Registrisse kantud  
- **Legal form:** `Osaühing`  
- **Source:** Estonian e-Business Register (RIK)  

## Ownership & control

### Owners / controllers

- **Mats Viisileht** (beneficial owner) — https://whiteintel.dev/entity/2f9a2a21-9b49-5055-b1b3-f9275bbb3403
- **Mihkel Hiielaid** (beneficial owner) — https://whiteintel.dev/entity/07b8fbc7-b85f-53e2-8858-d7dd4d8a25c2

### UBO chain (walk to the ultimate owner)

A **4-step** ownership/control chain to the ultimate beneficial owner is resolved for this entity. The full cited chain unlocks with a paid API key or a one-off dossier — https://whiteintel.dev/pricing.

## Provenance

- estonia_ariregister — https://ariregister.rik.ee/est/company/12321790

## Get the full, resolved dossier (agent-callable)

The above is the free teaser. The resolved **multi-hop UBO chain**, ownership **%**, full **financial history**, itemised **assets** and the hop-by-hop **exposure path** are the paid depth — callable as tools from your agent:

```bash
npx -y @whiteintel/mcp-server   # then: get_dossier · trace_ownership_path · check_offshore_exposure
```

Or unlock a one-off cited dossier for **O3 Inseneribüroo OÜ** — https://whiteintel.dev/entity/363ae3c2-d7cf-5c82-a0db-c68e57817580 · pricing https://whiteintel.dev/pricing.

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **O3 Inseneribüroo OÜ**. Human view: https://whiteintel.dev/entity/363ae3c2-d7cf-5c82-a0db-c68e57817580 · Structured JSON: https://whiteintel.dev/api/public/dossier/363ae3c2-d7cf-5c82-a0db-c68e57817580._

_Risk levels are heuristic investigative leads, not legal determinations of beneficial ownership. Every claim carries a source; an absent edge means "not yet observed in current sources", not "does not exist"._