---
title: "Prof William Daniel Toff — Ownership Dossier"
canonical: https://whiteintel.dev/entity/35aa80fc-da4f-464a-b67f-8d907c86e8b8
json: https://whiteintel.dev/api/public/dossier/35aa80fc-da4f-464a-b67f-8d907c86e8b8
identifier: psc:VybIGQ_1sZqOLhpJ1mdSD6eSiJg
jurisdiction: GB
risk: Low
source: WhiteIntel corporate-ownership graph
---

# Prof William Daniel Toff

**Type:** Person  
**Jurisdiction:** [GB](https://whiteintel.dev/jurisdictions/gb)  
**Identifier:** `psc:VybIGQ_1sZqOLhpJ1mdSD6eSiJg`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/35aa80fc-da4f-464a-b67f-8d907c86e8b8  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/35aa80fc-da4f-464a-b67f-8d907c86e8b8  

## Ownership & control

### Holdings / subsidiaries

- **HEARTWIZE** (beneficial owner) — https://whiteintel.dev/entity/742d546e-2d89-531c-aeba-cffbe82206f3

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **Prof William Daniel Toff**. Human view: https://whiteintel.dev/entity/35aa80fc-da4f-464a-b67f-8d907c86e8b8 · Structured JSON: https://whiteintel.dev/api/public/dossier/35aa80fc-da4f-464a-b67f-8d907c86e8b8._

_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"._