---
title: "CALVERT PETROPHYSICS LIMITED — Ownership Dossier"
canonical: https://whiteintel.dev/entity/34aae7a0-d877-5fba-bfbb-68a4281b94bc
json: https://whiteintel.dev/api/public/dossier/34aae7a0-d877-5fba-bfbb-68a4281b94bc
identifier: oo:GB-COH-15215888
jurisdiction: GB
risk: Low
source: WhiteIntel corporate-ownership graph
---

# CALVERT PETROPHYSICS LIMITED

**Type:** Company  
**Jurisdiction:** GB  
**Identifier:** `oo:GB-COH-15215888`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/34aae7a0-d877-5fba-bfbb-68a4281b94bc  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/34aae7a0-d877-5fba-bfbb-68a4281b94bc  

## Cross-source identity

The same real-world entity, resolved across sources:

- **CALVERT PETROPHYSICS LIMITED** — GLEIF · `lei:6488JH6WW06A23KQ3261` — https://whiteintel.dev/entity/d0b4913c-b7b5-5400-82e3-f28ae42a0da4

## Ownership & control

### Owners / controllers

- **Mr Stefan Eric Edward Calvert** (beneficial owner) — 100% — https://whiteintel.dev/entity/c5eb832a-bdad-5477-8a1d-47d747db60a4
- **Mr Stefan Eric Edward Calvert** (beneficial owner) — 87.5% — https://whiteintel.dev/entity/1910a173-34ce-4c75-b091-b2707d3117bf

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

1. **Mr Stefan Eric Edward Calvert** — beneficial owner 100% → *CALVERT PETROPHYSICS LIMITED*
1. **Mr Stefan Eric Edward Calvert** — beneficial owner 87.5% → *CALVERT PETROPHYSICS LIMITED*

## Company profile (live · UK Companies House)

- **Company number:** `15215888`
- **Status:** Active
- **Type:** Private Limited Company
- **Incorporated:** 2023-10-17
- **Registered office:** ST JAMES HOUSE, 9-15 ST JAMES ROAD, SURBITON, SURREY, KT6 4QH
- **SIC:** 06100 - Extraction of crude petroleum, 09100 - Support activities for petroleum and natural gas extraction

## Financials (Companies House accounts)

| Figure | 2026-04-30 | 2025-04-30 |
|---|---:|---:|
| Net assets | £21,398 | £14,707 |
| Cash | £42,524 | £52,597 |
| Shareholder funds | £1 | £1 |
| Fixed assets | £514 | £685 |
| Current assets | £83,523 | £72,606 |
| Employees | 1 | 1 |

_As filed at Companies House. Micro-entities file no profit-and-loss account._

## Provenance

- OpenOwnership — https://find-and-update.company-information.service.gov.uk/company/15215888
- companies_house_bulk — https://find-and-update.company-information.service.gov.uk/company/15215888
- companies_house_accounts — https://find-and-update.company-information.service.gov.uk/company/15215888/filing-history

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **CALVERT PETROPHYSICS LIMITED**. Human view: https://whiteintel.dev/entity/34aae7a0-d877-5fba-bfbb-68a4281b94bc · Structured JSON: https://whiteintel.dev/api/public/dossier/34aae7a0-d877-5fba-bfbb-68a4281b94bc._

_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"._