---
title: "MIMECAST MIDCO LIMITED — Ownership Dossier"
canonical: https://whiteintel.dev/entity/a7e2780a-796f-5e38-bbc4-6f5679aea96a
json: https://whiteintel.dev/api/public/dossier/a7e2780a-796f-5e38-bbc4-6f5679aea96a
identifier: oo:GB-COH-13772362
jurisdiction: GB
risk: Low
source: WhiteIntel corporate-ownership graph
---

# MIMECAST MIDCO LIMITED

**Type:** Company  
**Jurisdiction:** [GB](https://whiteintel.dev/jurisdictions/gb)  
**Identifier:** `oo:GB-COH-13772362`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/a7e2780a-796f-5e38-bbc4-6f5679aea96a  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/a7e2780a-796f-5e38-bbc4-6f5679aea96a  

## Cross-source identity

The same real-world entity, resolved across sources:

- **MAGNESIUM MIDCO LIMITED** — GLEIF · `lei:549300BL24Z853TDNO47` — https://whiteintel.dev/entity/9a1a7efc-ec9c-50c0-be29-c3fff7e38a54

## Ownership & control

### Owners / controllers

- **MIMECAST ADVISORY COMPANY LIMITED** (beneficial owner) — 100% — https://whiteintel.dev/entity/5e4a67a5-d140-5344-a33e-b1c56029d664
- **MIMECAST ADVISORY COMPANY LIMITED** (beneficial owner) — 87.5% — https://whiteintel.dev/entity/5e4a67a5-d140-5344-a33e-b1c56029d664

### Holdings / subsidiaries

- **MIMECAST BIDCO LIMITED** (beneficial owner) — 100% — https://whiteintel.dev/entity/83079660-06ed-5886-8a95-42621f1e8ebc
- **MIMECAST BIDCO LIMITED** (beneficial owner) — 87.5% — https://whiteintel.dev/entity/83079660-06ed-5886-8a95-42621f1e8ebc

### 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:** `13772362`
- **Status:** active
- **Type:** ltd
- **Incorporated:** 2021-11-29
- **Registered office:** Floor 4 1 Finsbury Avenue, London, EC2M 2PF, England
- **SIC:** 64209

### Officers

- DOLLASE, Christopher — secretary · appointed 2023-02-01
- CALL, David — director · American · appointed 2023-11-30
- PROSPER, Janet Alexia — director · British · appointed 2025-10-15
- NAULT, Robert — secretary · appointed 2022-05-19 · resigned 2023-01-31
- [ALTER DOMUS (UK) LIMITED](https://whiteintel.dev/entity/3bf6edd5-c4e3-588a-897a-7b64b62ad2f2) — corporate secretary · appointed 2021-11-29 · resigned 2022-05-19
- BROWN, Rafeal Edgar — director · American · appointed 2022-05-19 · resigned 2023-11-29
- JACOBS, Danie — director · British · appointed 2022-05-19 · resigned 2025-10-15
- MOLTON, Matthew Leonard — director · British · appointed 2021-11-29 · resigned 2022-05-19
- PAISLEY, Michael — director · British · appointed 2022-11-01 · resigned 2025-05-31
- PAISLEY, Michael — director · British · appointed 2022-05-19 · resigned 2022-05-20
- POZZO, Pierre Charles Andre — director · French · appointed 2021-11-29 · resigned 2022-05-19
- TROTT, Timothy Luke — director · British · appointed 2021-11-29 · resigned 2022-05-19

### Beneficial owners (Persons with Significant Control)

- [Mimecast Advisory Company Limited](https://whiteintel.dev/entity/5e4a67a5-d140-5344-a33e-b1c56029d664) — 75–100% shares · corporate PSC · United Kingdom — since 2021-11-29

## Provenance

- OpenOwnership — https://find-and-update.company-information.service.gov.uk/company/13772362
- companies_house_bulk — https://find-and-update.company-information.service.gov.uk/company/13772362

## Get the full, resolved dossier (agent-callable)

The above is the free teaser. The resolved **multi-hop UBO chain**, ownership **%**, full **financial history**, itemised **assets** and the hop-by-hop **exposure path** are the paid depth — callable as tools from your agent:

```bash
npx -y @whiteintel/mcp-server   # then: get_dossier · trace_ownership_path · check_offshore_exposure
```

Or unlock a one-off cited dossier for **MIMECAST MIDCO LIMITED** — https://whiteintel.dev/entity/a7e2780a-796f-5e38-bbc4-6f5679aea96a · pricing https://whiteintel.dev/pricing.

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **MIMECAST MIDCO LIMITED**. Human view: https://whiteintel.dev/entity/a7e2780a-796f-5e38-bbc4-6f5679aea96a · Structured JSON: https://whiteintel.dev/api/public/dossier/a7e2780a-796f-5e38-bbc4-6f5679aea96a._

_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"._