---
title: "Ulf Kaj Arne Hammarmyr — Ownership Dossier"
canonical: https://whiteintel.dev/entity/aec320aa-41b1-4cc6-a8e4-ae108dc172bc
json: https://whiteintel.dev/api/public/dossier/aec320aa-41b1-4cc6-a8e4-ae108dc172bc
identifier: psc:v62kizgZIYYU3c8F7jS1E7_plCQ
jurisdiction: GB
risk: Low
source: WhiteIntel corporate-ownership graph
---

# Ulf Kaj Arne Hammarmyr

**Type:** Person  
**Jurisdiction:** GB  
**Identifier:** `psc:v62kizgZIYYU3c8F7jS1E7_plCQ`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/aec320aa-41b1-4cc6-a8e4-ae108dc172bc  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/aec320aa-41b1-4cc6-a8e4-ae108dc172bc  

## Ownership & control

### Holdings / subsidiaries

- **MARTELLO ADVISORY SERVICES LIMITED** (beneficial owner) — 87.5% — https://whiteintel.dev/entity/3cea24d3-0857-5e9a-991a-03bba463bf5b

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **Ulf Kaj Arne Hammarmyr**. Human view: https://whiteintel.dev/entity/aec320aa-41b1-4cc6-a8e4-ae108dc172bc · Structured JSON: https://whiteintel.dev/api/public/dossier/aec320aa-41b1-4cc6-a8e4-ae108dc172bc._

_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"._