---
title: "BIOSYNTH HOLDINGS LIMITED — Ownership Dossier"
canonical: https://whiteintel.dev/entity/e975efbb-db4d-51a6-902e-96fcfaa64290
json: https://whiteintel.dev/api/public/dossier/e975efbb-db4d-51a6-902e-96fcfaa64290
identifier: oo:GB-COH-07391812
jurisdiction: CH
risk: Low
source: WhiteIntel corporate-ownership graph
---

# BIOSYNTH HOLDINGS LIMITED

**Type:** Company  
**Jurisdiction:** CH  
**Identifier:** `oo:GB-COH-07391812`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/e975efbb-db4d-51a6-902e-96fcfaa64290  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/e975efbb-db4d-51a6-902e-96fcfaa64290  

## Ownership & control

### Owners / controllers

- **Dr Vanessa Mary Eastwick-Field** (beneficial owner) — 75% — https://whiteintel.dev/entity/0c92cbb0-0dcb-56a0-9aec-23f7cae57de5
- **Mr James Bryce** (beneficial owner) — 37.5% — https://whiteintel.dev/entity/b91ae3fc-f85b-4b33-a8d3-6231a2f45155
- **Dr Vanessa Mary Eastwick-Field** (beneficial owner) — 62.5% — https://whiteintel.dev/entity/6e62f7fd-a932-4a74-9e57-216933aaa858
- **Biosynth Holding Ag** (beneficial owner) — 87.5% — https://whiteintel.dev/entity/62e36b10-3d69-4d58-bc30-435121d64151

### Holdings / subsidiaries

- **BIOSYNTH LIMITED** (beneficial owner) — 100% — https://whiteintel.dev/entity/3491f00a-4b9f-5945-9571-388f23b1bf13
- **BIOSYNTH LABORATORIES LIMITED** (beneficial owner) — 100% — https://whiteintel.dev/entity/1dbb2ab5-0a51-5b20-aea8-3a94243b5d60
- **PHOSPHONICS LIMITED** (beneficial owner) — 100% — https://whiteintel.dev/entity/ce2ee4c4-bdc1-5430-92c4-3faa8a3db026
- **BIOSYNTH LIMITED** (beneficial owner) — 87.5% — https://whiteintel.dev/entity/3491f00a-4b9f-5945-9571-388f23b1bf13
- **PHOSPHONICS LIMITED** (beneficial owner) — 87.5% — https://whiteintel.dev/entity/ce2ee4c4-bdc1-5430-92c4-3faa8a3db026
- **BIOSYNTH LABORATORIES LIMITED** (beneficial owner) — 87.5% — https://whiteintel.dev/entity/1dbb2ab5-0a51-5b20-aea8-3a94243b5d60

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

A **4-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:** `07391812`
- **Status:** Active
- **Type:** Private Limited Company
- **Incorporated:** 2010-09-29
- **Registered office:** 8&9 OLD STATION BUSINESS PARK, COMPTON, RG20 6NE
- **SIC:** 70100 - Activities of head offices

## Provenance

- OpenOwnership — https://find-and-update.company-information.service.gov.uk/company/07391812
- companies_house_bulk — https://find-and-update.company-information.service.gov.uk/company/07391812

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **BIOSYNTH HOLDINGS LIMITED**. Human view: https://whiteintel.dev/entity/e975efbb-db4d-51a6-902e-96fcfaa64290 · Structured JSON: https://whiteintel.dev/api/public/dossier/e975efbb-db4d-51a6-902e-96fcfaa64290._

_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"._