---
title: "Sergei Nikolajev — Ownership Dossier"
canonical: https://whiteintel.dev/entity/2bd48617-9e4b-5d01-9968-6354129c2bc9
json: https://whiteintel.dev/api/public/dossier/2bd48617-9e4b-5d01-9968-6354129c2bc9
jurisdiction: EE
source: WhiteIntel corporate-ownership graph
---

# Sergei Nikolajev

**Type:** Person  
**Jurisdiction:** EE  
**Canonical dossier:** https://whiteintel.dev/entity/2bd48617-9e4b-5d01-9968-6354129c2bc9  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/2bd48617-9e4b-5d01-9968-6354129c2bc9  

## Ownership & control

### Holdings / subsidiaries

- **Usaldusühing Fiesna** (Täisosanik) — https://whiteintel.dev/entity/a5424711-be1c-573b-9314-d06ce8796b38
- **Usaldusühing GAASSEN** (Täisosanik) — https://whiteintel.dev/entity/5006d1c4-fb11-53fd-af3e-df9ed506e1d0
- **Usaldusühing Fiesna** (beneficial owner) — https://whiteintel.dev/entity/a5424711-be1c-573b-9314-d06ce8796b38
- **Usaldusühing GAASSEN** (beneficial owner) — https://whiteintel.dev/entity/5006d1c4-fb11-53fd-af3e-df9ed506e1d0

## Provenance

- estonia_ariregister — https://avaandmed.ariregister.rik.ee/

## 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 **Sergei Nikolajev** — https://whiteintel.dev/entity/2bd48617-9e4b-5d01-9968-6354129c2bc9 · pricing https://whiteintel.dev/pricing.

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **Sergei Nikolajev**. Human view: https://whiteintel.dev/entity/2bd48617-9e4b-5d01-9968-6354129c2bc9 · Structured JSON: https://whiteintel.dev/api/public/dossier/2bd48617-9e4b-5d01-9968-6354129c2bc9._

_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"._