---
title: "IRIS INFRA HOLDCO LIMITED — Ownership Dossier"
canonical: https://whiteintel.dev/entity/65ffc4e6-298e-5cb7-82ff-fbae14a2bee0
json: https://whiteintel.dev/api/public/dossier/65ffc4e6-298e-5cb7-82ff-fbae14a2bee0
identifier: oo:GB-COH-13055379
jurisdiction: GB
risk: Low
source: WhiteIntel corporate-ownership graph
---

# IRIS INFRA HOLDCO LIMITED

**Type:** Company  
**Jurisdiction:** GB  
**Identifier:** `oo:GB-COH-13055379`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/65ffc4e6-298e-5cb7-82ff-fbae14a2bee0  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/65ffc4e6-298e-5cb7-82ff-fbae14a2bee0  

## Ownership & control

### Owners / controllers

- **IRIS INFRA MASTER HOLDCO LIMITED** (beneficial owner) — 100% — https://whiteintel.dev/entity/a78c7156-43c9-5d77-bd82-2ee8b5139bf4
- **IRIS INFRA MASTER HOLDCO LIMITED** (beneficial owner) — 87.5% — https://whiteintel.dev/entity/a78c7156-43c9-5d77-bd82-2ee8b5139bf4

### Holdings / subsidiaries

- **IRIS INFRA LIMITED** (beneficial owner) — 100% — https://whiteintel.dev/entity/d7847394-7020-5c0b-b065-b627d70ceee0
- **ALTNET PARTNERS HOLDCO LIMITED** (beneficial owner) — 100% — https://whiteintel.dev/entity/4ad79918-6e1f-5912-aa1d-440a38fd0b15
- **FULL FIBRE LIMITED** (beneficial owner) — 100% — https://whiteintel.dev/entity/92ff7d07-4d52-5508-b5c1-f9b59421f2f2
- **FULL FIBRE LIMITED** (beneficial owner) — 87.5% — https://whiteintel.dev/entity/92ff7d07-4d52-5508-b5c1-f9b59421f2f2
- **ALTNET PARTNERS HOLDCO LIMITED** (beneficial owner) — 62.5% — https://whiteintel.dev/entity/4ad79918-6e1f-5912-aa1d-440a38fd0b15

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

1. **IRIS INFRA MASTER HOLDCO LIMITED** — beneficial owner 100% → *IRIS INFRA HOLDCO LIMITED*
1. **IRIS INFRA MASTER HOLDCO LIMITED** — beneficial owner 87.5% → *IRIS INFRA HOLDCO LIMITED*
2. **IRIS HOLDCO LIMITED** — beneficial owner 100% → *IRIS INFRA MASTER HOLDCO LIMITED*
2. **IRIS HOLDCO LIMITED** — beneficial owner 87.5% → *IRIS INFRA MASTER HOLDCO LIMITED*
3. **IRIS MASTER HOLDCO LIMITED** — beneficial owner 87.5% → *IRIS HOLDCO LIMITED*
4. **BASALT INFRASTRUCTURE PARTNERS LLP** — beneficial owner → *IRIS MASTER HOLDCO LIMITED*
5. **BALFOUR BEATTY INFRASTRUCTURE PARTNERS MEMBER LIMITED** — beneficial owner 100% → *BASALT INFRASTRUCTURE PARTNERS LLP*
5. **Mr Robert John Gregor** — beneficial owner → *BASALT INFRASTRUCTURE PARTNERS LLP*
5. **Mr Steven Lowry** — beneficial owner → *BASALT INFRASTRUCTURE PARTNERS LLP*
5. **Jeffrey Neil** — beneficial owner 50% → *BASALT INFRASTRUCTURE PARTNERS LLP*
5. **COLLIERS INVESTMENT MANAGEMENT UK HOLDINGS LIMITED** — beneficial owner → *BASALT INFRASTRUCTURE PARTNERS LLP*
5. **Jeffrey Neil** — beneficial owner → *BASALT INFRASTRUCTURE PARTNERS LLP*
5. **BALFOUR BEATTY INFRASTRUCTURE PARTNERS MEMBER LIMITED** — beneficial owner → *BASALT INFRASTRUCTURE PARTNERS LLP*
5. **Mr Robert John Gregor** — beneficial owner → *BASALT INFRASTRUCTURE PARTNERS LLP*
5. **Mr Steven Lowry** — beneficial owner → *BASALT INFRASTRUCTURE PARTNERS LLP*
6. **BALFOUR BEATTY INVESTMENT HOLDINGS LIMITED** — beneficial owner 100% → *BALFOUR BEATTY INFRASTRUCTURE PARTNERS MEMBER LIMITED*
6. **Balfour Beatty Investment Holdings Limited** — beneficial owner 87.5% → *BALFOUR BEATTY INFRASTRUCTURE PARTNERS MEMBER LIMITED*

## Company profile (live · UK Companies House)

- **Company number:** `13055379`
- **Status:** active
- **Type:** ltd
- **Incorporated:** 2020-12-01
- **Registered office:** C/O Dmh Stallard Llp, Fetter Yard, Barnards Inn, 86 Fetter Lane, London, EC4A 1EN, United Kingdom
- **SIC:** 61900

### Officers

- SMITH, Julian — secretary · appointed 2025-03-07
- BARRIENTOS OSSIO, Marianna — director · British · appointed 2025-03-07
- DOYLE, Paul — director · Irish · appointed 2020-12-01
- LOWRY, Steven — director · British · appointed 2020-12-01
- WARNER, James Stephen — director · British · appointed 2024-02-29
- PLAHAY, Kulvinder Singh — secretary · appointed 2023-01-23 · resigned 2025-03-07
- HELM, Oliver Dieter — director · British · appointed 2021-01-08 · resigned 2024-02-29
- JONES, Wil — director · English · appointed 2020-12-01 · resigned 2025-03-07
- WARNER, James Stephen — director · British · appointed 2021-01-08 · resigned 2023-09-26

### Beneficial owners (Persons with Significant Control)

- [Iris Infra Master Holdco Limited](https://whiteintel.dev/entity/a78c7156-43c9-5d77-bd82-2ee8b5139bf4) — 75–100% shares · corporate PSC · United Kingdom — since 2020-12-01

## Provenance

- OpenOwnership — https://find-and-update.company-information.service.gov.uk/company/13055379
- companies_house_bulk — https://find-and-update.company-information.service.gov.uk/company/13055379

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **IRIS INFRA HOLDCO LIMITED**. Human view: https://whiteintel.dev/entity/65ffc4e6-298e-5cb7-82ff-fbae14a2bee0 · Structured JSON: https://whiteintel.dev/api/public/dossier/65ffc4e6-298e-5cb7-82ff-fbae14a2bee0._

_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"._