---
title: "Mr Mark Slack — Ownership Dossier"
canonical: https://whiteintel.dev/entity/d2fd50b3-d75c-42b9-9d7b-2b656eb74ff5
json: https://whiteintel.dev/api/public/dossier/d2fd50b3-d75c-42b9-9d7b-2b656eb74ff5
identifier: psc:B2tHVuZwx1vIPk9Wdc0T1-Smccc
jurisdiction: GB
risk: Low
source: WhiteIntel corporate-ownership graph
---

# Mr Mark Slack

**Type:** Person  
**Jurisdiction:** GB  
**Identifier:** `psc:B2tHVuZwx1vIPk9Wdc0T1-Smccc`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/d2fd50b3-d75c-42b9-9d7b-2b656eb74ff5  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/d2fd50b3-d75c-42b9-9d7b-2b656eb74ff5  

## Ownership & control

### Holdings / subsidiaries

- **NORTHSITE SERVICES LTD** (beneficial owner) — 87.5% — https://whiteintel.dev/entity/b6f27f64-8cb1-53ca-ba06-288bf96bf5cb

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **Mr Mark Slack**. Human view: https://whiteintel.dev/entity/d2fd50b3-d75c-42b9-9d7b-2b656eb74ff5 · Structured JSON: https://whiteintel.dev/api/public/dossier/d2fd50b3-d75c-42b9-9d7b-2b656eb74ff5._

_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"._