---
title: "ONSIDE ACCOUNTING LIMITED — Ownership Dossier"
canonical: https://whiteintel.dev/entity/f7ecf152-3de0-5cc0-8916-c025df59cfb1
json: https://whiteintel.dev/api/public/dossier/f7ecf152-3de0-5cc0-8916-c025df59cfb1
identifier: oo:GB-COH-13428300
jurisdiction: GB
risk: Low
source: WhiteIntel corporate-ownership graph
---

# ONSIDE ACCOUNTING LIMITED

**Type:** Company  
**Jurisdiction:** [GB](https://whiteintel.dev/jurisdictions/gb)  
**Identifier:** `oo:GB-COH-13428300`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/f7ecf152-3de0-5cc0-8916-c025df59cfb1  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/f7ecf152-3de0-5cc0-8916-c025df59cfb1  

## Ownership & control

### Owners / controllers

- **Mr Martin Edward Brennan** (beneficial owner) — 75% — https://whiteintel.dev/entity/da4247e2-3287-5325-ab08-e40102f078f8
- **Mrs Jessica Ann Brennan** (beneficial owner) — 50% — https://whiteintel.dev/entity/8eb60211-4657-540e-ade1-2932e4d9e20d
- **Mrs Jessica Ann Brennan** (beneficial owner) — 37.5% — https://whiteintel.dev/entity/6b60bd8f-a933-462d-938e-b75c1f2a5884
- **MULTIPLIER HOLDINGS UK LIMITED** (beneficial owner) — 87.5% — https://whiteintel.dev/entity/759e2520-4fa6-48cb-84f7-f85cfa2afc21
- **Mr Martin Edward Brennan** (beneficial owner) — 62.5% — https://whiteintel.dev/entity/0f70c109-bf71-4409-8140-abada81cdd6b

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

A **6-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:** `13428300`
- **Status:** active
- **Type:** ltd
- **Incorporated:** 2021-05-28
- **Registered office:** 86-90 Paul Street, London, England, EC2A 4NE, United Kingdom
- **SIC:** 69201, 69202, 69203

### Officers

- BRENNAN, Martin Edward — director · British · appointed 2021-05-28
- BRENNAN, Jessica Ann — secretary · appointed 2024-08-01 · resigned 2025-12-22

### Beneficial owners (Persons with Significant Control)

- [Multiplier Holdings Uk Limited](https://whiteintel.dev/entity/759e2520-4fa6-48cb-84f7-f85cfa2afc21) — 75–100% shares · corporate PSC · England — since 2025-08-29
- Mrs Jessica Ann Brennan — 25–50% shares · individual PSC · United Kingdom — ceased 2025-08-29
- Mr Martin Edward Brennan — 50–75% shares · individual PSC · United Kingdom — ceased 2025-08-29

## Provenance

- OpenOwnership — https://find-and-update.company-information.service.gov.uk/company/13428300
- companies_house_bulk — https://find-and-update.company-information.service.gov.uk/company/13428300

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **ONSIDE ACCOUNTING LIMITED**. Human view: https://whiteintel.dev/entity/f7ecf152-3de0-5cc0-8916-c025df59cfb1 · Structured JSON: https://whiteintel.dev/api/public/dossier/f7ecf152-3de0-5cc0-8916-c025df59cfb1._

_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"._