---
title: "3I TAMPNET HOLDINGS LIMITED — Ownership Dossier"
canonical: https://whiteintel.dev/entity/dd2d186f-1e6f-5eef-8530-80fe918f41db
json: https://whiteintel.dev/api/public/dossier/dd2d186f-1e6f-5eef-8530-80fe918f41db
identifier: oo:GB-COH-11909513
jurisdiction: GB
risk: Low
source: WhiteIntel corporate-ownership graph
---

# 3I TAMPNET HOLDINGS LIMITED

**Type:** Company  
**Jurisdiction:** [GB](https://whiteintel.dev/jurisdictions/gb)  
**Identifier:** `oo:GB-COH-11909513`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/dd2d186f-1e6f-5eef-8530-80fe918f41db  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/dd2d186f-1e6f-5eef-8530-80fe918f41db  

## Ownership & control

### Owners / controllers

- **3i Infrastructure Plc** (beneficial owner) — 87.5% — https://whiteintel.dev/entity/e160e33f-5fd5-4d0c-8fed-f461cb04b363

### Holdings / subsidiaries

- **COLOMBO TOPCO LIMITED** (beneficial owner) — 50% — https://whiteintel.dev/entity/a0df4d29-3ad6-5ae3-a8fc-f6fbd5e16351
- **COLOMBO TOPCO LIMITED** (beneficial owner) — 37.5% — https://whiteintel.dev/entity/a0df4d29-3ad6-5ae3-a8fc-f6fbd5e16351

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

A **1-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:** `11909513`
- **Status:** active
- **Type:** ltd
- **Incorporated:** 2019-03-27
- **Registered office:** 4th Floor, 140 Aldersgate Street, London, EC1A 4HY, United Kingdom
- **SIC:** 64209

### Officers

- [APEX TRUST CORPORATE LIMITED](https://whiteintel.dev/entity/a5f762e5-968a-5c62-a602-4ff5670fd69f) — corporate secretary · appointed 2020-07-22
- DAWES, James Peter — director · British · appointed 2019-03-27
- DOBERMAN, Jonathan Peter — director · British · appointed 2019-03-27

### Beneficial owners (Persons with Significant Control)

- [3i Infrastructure Plc](https://whiteintel.dev/entity/e160e33f-5fd5-4d0c-8fed-f461cb04b363) — 75–100% shares · corporate PSC · United Kingdom — since 2019-03-27

## Provenance

- companies_house_bulk — https://find-and-update.company-information.service.gov.uk/company/11909513
- OpenOwnership — https://find-and-update.company-information.service.gov.uk/company/11909513

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **3I TAMPNET HOLDINGS LIMITED**. Human view: https://whiteintel.dev/entity/dd2d186f-1e6f-5eef-8530-80fe918f41db · Structured JSON: https://whiteintel.dev/api/public/dossier/dd2d186f-1e6f-5eef-8530-80fe918f41db._

_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"._