---
title: "GELSTON PHILIP A — Ownership Dossier"
canonical: https://whiteintel.dev/entity/f2673da9-3102-5329-9cc2-8ebbfc79dd66
json: https://whiteintel.dev/api/public/dossier/f2673da9-3102-5329-9cc2-8ebbfc79dd66
identifier: sec:0001733327
jurisdiction: US
risk: Low
source: WhiteIntel corporate-ownership graph
---

# GELSTON PHILIP A

**Type:** Company  
**Jurisdiction:** [US](https://whiteintel.dev/jurisdictions/us)  
**Identifier:** `sec:0001733327`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/f2673da9-3102-5329-9cc2-8ebbfc79dd66  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/f2673da9-3102-5329-9cc2-8ebbfc79dd66  

## Ownership & control

### Holdings / subsidiaries

- **WHITE MOUNTAINS INSURANCE GROUP LTD** (director) — https://whiteintel.dev/entity/9387f4ef-f2e3-5a49-ad2b-0870b9aa98b0

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **GELSTON PHILIP A**. Human view: https://whiteintel.dev/entity/f2673da9-3102-5329-9cc2-8ebbfc79dd66 · Structured JSON: https://whiteintel.dev/api/public/dossier/f2673da9-3102-5329-9cc2-8ebbfc79dd66._

_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"._