---
title: "SIGMA CAPITAL LIMITED — Ownership Dossier"
canonical: https://whiteintel.dev/entity/ed87a544-df97-5b73-89df-c04a2d38be2a
json: https://whiteintel.dev/api/public/dossier/ed87a544-df97-5b73-89df-c04a2d38be2a
identifier: oo:GB-COH-02892827
jurisdiction: GB
risk: Low
source: WhiteIntel corporate-ownership graph
---

# SIGMA CAPITAL LIMITED

**Type:** Company  
**Jurisdiction:** [GB](https://whiteintel.dev/jurisdictions/gb)  
**Identifier:** `oo:GB-COH-02892827`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/ed87a544-df97-5b73-89df-c04a2d38be2a  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/ed87a544-df97-5b73-89df-c04a2d38be2a  

## Ownership & control

### Owners / controllers

- **Mark Evan Sohn** (beneficial owner) — 100% — https://whiteintel.dev/entity/e005d55b-b329-5edb-a5dc-e2de0905b086
- **David Ungar** (beneficial owner) — 50% — https://whiteintel.dev/entity/777fe4b8-517f-5899-bdaa-e9d9fcdec129
- **Tobias Lancaster Joyce** (beneficial owner) — 100% — https://whiteintel.dev/entity/4a526092-0847-5dd8-9ea7-b048ca5de41e
- **Tobias Lancaster Joyce** (beneficial owner) — 87.5% — https://whiteintel.dev/entity/4f4b0527-4e2b-4da7-baae-ad10a272fe0a
- **Mark Evan Sohn** (beneficial owner) — 87.5% — https://whiteintel.dev/entity/94c56e84-38a0-4603-a88f-c4b37529e03e
- **David Ungar** (beneficial owner) — 37.5% — https://whiteintel.dev/entity/dbc82bc2-91e0-43d3-b846-1c09412f8e04

### 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:** `02892827`
- **Status:** active
- **Type:** ltd
- **Incorporated:** 1994-01-31
- **Registered office:** 5 Market Yard Mews, 194-204 Bermondsey Street, London, SE1 3TQ, United Kingdom
- **SIC:** 82990

### Officers

- [CORNHILL SECRETARIES LIMITED](https://whiteintel.dev/entity/d1af341e-0e04-4f93-9676-b362498cf1fc) — corporate secretary · appointed 2010-04-01
- WILSON, Hannah Maud — director · British · appointed 2020-10-05
- GORDON, Anthony Richard Francis — secretary · British · appointed 1994-01-31 · resigned 2010-04-01
- WALTER, David Andrew — secretary · British · appointed 1994-01-31 · resigned 1994-03-29
- AUDLEY, Maxwell Charles — director · British · appointed 1994-01-31 · resigned 1994-03-29
- GORDON, Anthony Richard Francis — director · British · appointed 1994-01-31 · resigned 1994-03-29
- JOYCE, Tobias Lancaster — director · British · appointed 2018-07-18 · resigned 2020-10-05
- SOHN, Mark Evan — director · American · appointed 1994-03-29 · resigned 2018-07-18
- WALTER, David Andrew — director · British · appointed 1994-01-31 · resigned 1994-03-29
- WILSON, Hannah Maud — director · British · appointed 2019-07-30 · resigned 2020-10-05

### Beneficial owners (Persons with Significant Control)

- Tobias Lancaster Joyce — 75–100% shares · individual PSC · United Kingdom — since 2018-07-18
- Mark Evan Sohn — 75–100% shares · individual PSC · United Kingdom — ceased 2018-07-18
- David Ungar — 25–50% shares · individual PSC · Zimbabwe — ceased 2017-12-15

## Provenance

- OpenOwnership — https://find-and-update.company-information.service.gov.uk/company/02892827
- companies_house_bulk — https://find-and-update.company-information.service.gov.uk/company/02892827

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **SIGMA CAPITAL LIMITED**. Human view: https://whiteintel.dev/entity/ed87a544-df97-5b73-89df-c04a2d38be2a · Structured JSON: https://whiteintel.dev/api/public/dossier/ed87a544-df97-5b73-89df-c04a2d38be2a._

_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"._