---
title: "Mrs Janna Mariana Tamminen — Ownership Dossier"
canonical: https://whiteintel.dev/entity/4b2ce06c-a710-56cf-99bd-c2be048a224e
json: https://whiteintel.dev/api/public/dossier/4b2ce06c-a710-56cf-99bd-c2be048a224e
identifier: oo-person:GB-COH-PER-12839202-PYSr_1rseaY25zGKbUvIfNHNVAY
jurisdiction: FI
risk: Low
source: WhiteIntel corporate-ownership graph
---

# Mrs Janna Mariana Tamminen

**Type:** Person  
**Jurisdiction:** FI  
**Identifier:** `oo-person:GB-COH-PER-12839202-PYSr_1rseaY25zGKbUvIfNHNVAY`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/4b2ce06c-a710-56cf-99bd-c2be048a224e  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/4b2ce06c-a710-56cf-99bd-c2be048a224e  

## Ownership & control

### Holdings / subsidiaries

- **MYCON CONSTRUCTION & MAINTENANCE LIMITED** (beneficial owner) — 50% — https://whiteintel.dev/entity/b955a3f0-aea4-5b63-b3e5-4d35d4c2137a

## Provenance

- OpenOwnership — https://www.openownership.org

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **Mrs Janna Mariana Tamminen**. Human view: https://whiteintel.dev/entity/4b2ce06c-a710-56cf-99bd-c2be048a224e · Structured JSON: https://whiteintel.dev/api/public/dossier/4b2ce06c-a710-56cf-99bd-c2be048a224e._

_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"._