---
title: "NORTHERN GRITSTONE LIMITED — Ownership Dossier"
canonical: https://whiteintel.dev/entity/b3a35a6d-6951-56ef-be7f-ffd72b87b71d
json: https://whiteintel.dev/api/public/dossier/b3a35a6d-6951-56ef-be7f-ffd72b87b71d
identifier: oo:GB-COH-12982592
jurisdiction: GB
risk: Low
source: WhiteIntel corporate-ownership graph
---

# NORTHERN GRITSTONE LIMITED

**Type:** Company  
**Jurisdiction:** [GB](https://whiteintel.dev/jurisdictions/gb)  
**Identifier:** `oo:GB-COH-12982592`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/b3a35a6d-6951-56ef-be7f-ffd72b87b71d  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/b3a35a6d-6951-56ef-be7f-ffd72b87b71d  

## Ownership & control

### Owners / controllers

- **M&G FA LIMITED** (beneficial owner) — 50% — https://whiteintel.dev/entity/55375be8-d06b-5815-83f9-312e67ef5321
- **Duncan Edward Johnson** (beneficial owner) — 100% — https://whiteintel.dev/entity/18f1cefa-1c5f-5044-9c3d-c64236de7205
- **PINSENT MASONS DIRECTOR LIMITED** (beneficial owner) — 100% — https://whiteintel.dev/entity/5b6f5992-d036-5f31-8eb6-a7426cd32144
- **PINSENT MASONS DIRECTOR LIMITED** (beneficial owner) — 87.5% — https://whiteintel.dev/entity/5b6f5992-d036-5f31-8eb6-a7426cd32144
- **M&G FA LIMITED** (beneficial owner) — https://whiteintel.dev/entity/55375be8-d06b-5815-83f9-312e67ef5321
- **Duncan Edward Johnson** (beneficial owner) — 87.5% — https://whiteintel.dev/entity/5d9a19cf-2074-40c9-91bc-2fbf08a34bea

### Holdings / subsidiaries

- **SIMANALYTICA LIMITED** (beneficial owner) — 50% — https://whiteintel.dev/entity/a0812513-3b73-53f0-adb5-9ae30b9c6f11
- **ADSILICO LIMITED** (beneficial owner) — 50% — https://whiteintel.dev/entity/87a74fe5-9dcd-53e0-8925-4b2e91dcdaa0
- **EXCITING INSTRUMENTS LIMITED** (beneficial owner) — 50% — https://whiteintel.dev/entity/a1e0b0cc-71ee-5e1f-9deb-c6892fff3d27
- **AUXETEC LIMITED** (beneficial owner) — 50% — https://whiteintel.dev/entity/ee5184d2-2ee0-5aa2-b134-9612c867a077
- **NORTHERN GRITSTONE INNOVATION SERVICES LIMITED** (beneficial owner) — 100% — https://whiteintel.dev/entity/06a71521-149d-5979-b4d3-de155b087ca7
- **NORTHERN GRITSTONE INVESTMENT MANAGER LIMITED** (beneficial owner) — 100% — https://whiteintel.dev/entity/c5e81449-2c2c-572f-b2fb-f746da76623e
- **CRUCIBLE THERAPEUTICS LIMITED** (beneficial owner) — 50% — https://whiteintel.dev/entity/3e39f43d-d5c3-52dd-ae7e-1384748e273f
- **FLOREON TECHNOLOGY LIMITED** (beneficial owner) — 50% — https://whiteintel.dev/entity/b7d823ad-e4a9-5441-aaf1-4ca164223556
- **MIMETRIK SOLUTIONS LIMITED** (beneficial owner) — 50% — https://whiteintel.dev/entity/be65c8bb-cc8a-5f86-b747-9d86a6743b9e
- **CRUCIBLE THERAPEUTICS LIMITED** (beneficial owner) — 37.5% — https://whiteintel.dev/entity/3e39f43d-d5c3-52dd-ae7e-1384748e273f
- **NORTHERN GRITSTONE INVESTMENT MANAGER LIMITED** (beneficial owner) — 87.5% — https://whiteintel.dev/entity/c5e81449-2c2c-572f-b2fb-f746da76623e
- **AUXETEC LIMITED** (beneficial owner) — 37.5% — https://whiteintel.dev/entity/ee5184d2-2ee0-5aa2-b134-9612c867a077
- **PHOVIR TECHNOLOGIES LIMITED** (beneficial owner) — 37.5% — https://whiteintel.dev/entity/4b817f72-5206-53f4-9b47-5e896d067330
- **ADSILICO LIMITED** (beneficial owner) — 37.5% — https://whiteintel.dev/entity/87a74fe5-9dcd-53e0-8925-4b2e91dcdaa0
- **SIMANALYTICA LIMITED** (beneficial owner) — 37.5% — https://whiteintel.dev/entity/a0812513-3b73-53f0-adb5-9ae30b9c6f11
- **IVFMICRO LIMITED** (beneficial owner) — 37.5% — https://whiteintel.dev/entity/f2c45137-b921-5fde-bc15-05c469198949
- **OLO ROBOTICS LTD** (beneficial owner) — 37.5% — https://whiteintel.dev/entity/7e9a386f-38ed-512b-861a-6b250c806c2c
- **OPTALYSYS LTD** (beneficial owner) — https://whiteintel.dev/entity/440ee16d-fa4b-5325-b386-92ebde229380
- **EXCITING INSTRUMENTS LIMITED** (beneficial owner) — 37.5% — https://whiteintel.dev/entity/a1e0b0cc-71ee-5e1f-9deb-c6892fff3d27
- **CYTOTRAIT LIMITED** (beneficial owner) — 37.5% — https://whiteintel.dev/entity/8606a82f-ff52-5380-b118-1cc1ed320603
- **PIXEL-FLO LIMITED** (beneficial owner) — 37.5% — https://whiteintel.dev/entity/7b830514-c731-48e2-8237-d9d7ac1180d4
- **AMPLISI LIMITED** (beneficial owner) — 37.5% — https://whiteintel.dev/entity/1bec86bb-404f-485a-9b5a-f88bb218949b
- **NORTHERN GRITSTONE INNOVATION SERVICES LIMITED** (beneficial owner) — 87.5% — https://whiteintel.dev/entity/06a71521-149d-5979-b4d3-de155b087ca7
- **FLOREON TECHNOLOGY LIMITED** (beneficial owner) — 37.5% — https://whiteintel.dev/entity/b7d823ad-e4a9-5441-aaf1-4ca164223556

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

A **32-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:** `12982592`
- **Status:** active
- **Type:** ltd
- **Incorporated:** 2020-10-29
- **Registered office:** No.1 Circle Square, 3 Symphony Park, Manchester, M1 7FS, United Kingdom
- **SIC:** 64303

### Officers

- BLACKBURN, Claire Helen — secretary · appointed 2023-11-22
- DOWDALL, Paddy — director · British · appointed 2025-04-01
- GRAHAM, Andrew Mcculloch — director · British · appointed 2020-12-23
- HADLEY, James Marshall — director · British · appointed 2022-05-06
- HARTLEY, Susan Elaine — director · British · appointed 2022-11-24
- HOLDEN, Anthony John, Professor — director · British · appointed 2026-02-24
- JOHNSON, Duncan Edward — director · British · appointed 2021-09-09
- MACPHERSON, Alexander Ian — director · British · appointed 2021-09-09
- MADELEY, Jane Elisabeth — director · British · appointed 2021-09-09
- O'NEILL, Terence James, Lord — director · British · appointed 2021-09-09
- SIRDESHPANDE, Niranjan Srihari — director · British · appointed 2022-05-19
- [INDIGO CORPORATE SECRETARY LIMITED](https://whiteintel.dev/entity/a4bad714-6b36-5b27-abc3-3d333061a1dd) — corporate secretary · appointed 2021-09-09 · resigned 2023-10-19
- [PINSENT MASONS SECRETARIAL LIMITED](https://whiteintel.dev/entity/4cd3ee32-bc25-581b-95e6-0c580796349e) — corporate secretary · appointed 2020-10-29 · resigned 2021-09-09
- BOOKER, Russell Stuart — director · British · appointed 2020-10-29 · resigned 2020-12-23
- GEORGHIOU, Gregory Loukas, Professor — director · British · appointed 2021-09-09 · resigned 2026-02-24
- PETLEY, David Neil, Professor — director · British · appointed 2021-09-09 · resigned 2022-09-01

### Beneficial owners (Persons with Significant Control)

- [M&G Fa Limited](https://whiteintel.dev/entity/55375be8-d06b-5815-83f9-312e67ef5321) — 25–50% votes · corporate PSC · United Kingdom — ceased 2023-03-14
- Duncan Edward Johnson — 75–100% shares · individual PSC · United Kingdom — ceased 2022-05-19
- [Pinsent Masons Director Limited](https://whiteintel.dev/entity/5b6f5992-d036-5f31-8eb6-a7426cd32144) — 75–100% shares · corporate PSC · United Kingdom — ceased 2022-05-16

## Provenance

- OpenOwnership — https://find-and-update.company-information.service.gov.uk/company/12982592
- companies_house_bulk — https://find-and-update.company-information.service.gov.uk/company/12982592

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **NORTHERN GRITSTONE LIMITED**. Human view: https://whiteintel.dev/entity/b3a35a6d-6951-56ef-be7f-ffd72b87b71d · Structured JSON: https://whiteintel.dev/api/public/dossier/b3a35a6d-6951-56ef-be7f-ffd72b87b71d._

_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"._