---
title: "PROJECT SEMAPHORE TOPCO LIMITED — Ownership Dossier"
canonical: https://whiteintel.dev/entity/89d230b9-49a8-4911-8ddb-142a27e542bb
json: https://whiteintel.dev/api/public/dossier/89d230b9-49a8-4911-8ddb-142a27e542bb
identifier: gb-coh:16304621
jurisdiction: GB
risk: Low
source: WhiteIntel corporate-ownership graph
---

# PROJECT SEMAPHORE TOPCO LIMITED

**Type:** Company  
**Jurisdiction:** [GB](https://whiteintel.dev/jurisdictions/gb)  
**Identifier:** `gb-coh:16304621`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/89d230b9-49a8-4911-8ddb-142a27e542bb  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/89d230b9-49a8-4911-8ddb-142a27e542bb  

## Ownership & control

### Owners / controllers

- **TENZING PE III GP LLP** (beneficial owner) — 87.5% — https://whiteintel.dev/entity/63ab32d0-a782-5815-bb88-d45474eae9d8

### Holdings / subsidiaries

- **PROJECT SEMAPHORE MIDCO LIMITED** (beneficial owner) — 87.5% — https://whiteintel.dev/entity/c6760f4c-4161-4e5e-8ba2-36eba3c6a91c

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

A **10-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.

## Company profile (live · UK Companies House)

- **Company number:** `16304621`
- **Status:** active
- **Type:** ltd
- **Incorporated:** 2025-03-10
- **Registered office:** Heddon House, 149-151 Regent Street, London, W1B 4JD, United Kingdom
- **SIC:** 64209

### Officers

- GUYOT, Cédric — director · Swiss · appointed 2026-05-20
- LAVIN, Carl Anthony — director · British · appointed 2025-03-10
- MCDERMOTT, Mark Hamilton — director · British · appointed 2025-04-04
- STEPHENSON, Keir — director · British · appointed 2025-04-04
- TURK, Matthew — director · British · appointed 2025-04-04
- WARREN, Guy Andrew — director · British · appointed 2026-05-20

### Beneficial owners (Persons with Significant Control)

- [Tenzing Pe Iii Gp Llp](https://whiteintel.dev/entity/63ab32d0-a782-5815-bb88-d45474eae9d8) — 75–100% shares · corporate PSC · United Kingdom — since 2025-03-10

## Provenance

- companies_house_bulk — https://find-and-update.company-information.service.gov.uk/company/16304621

## 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 **PROJECT SEMAPHORE TOPCO LIMITED** — https://whiteintel.dev/entity/89d230b9-49a8-4911-8ddb-142a27e542bb · pricing https://whiteintel.dev/pricing.

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **PROJECT SEMAPHORE TOPCO LIMITED**. Human view: https://whiteintel.dev/entity/89d230b9-49a8-4911-8ddb-142a27e542bb · Structured JSON: https://whiteintel.dev/api/public/dossier/89d230b9-49a8-4911-8ddb-142a27e542bb._

_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"._