---
title: "MANNIX HENRY III — Ownership Dossier"
canonical: https://whiteintel.dev/entity/f4cc4f6f-27a8-545e-8dcd-d15c78f5fa72
json: https://whiteintel.dev/api/public/dossier/f4cc4f6f-27a8-545e-8dcd-d15c78f5fa72
identifier: sec:0001628154
jurisdiction: US
risk: Low
source: WhiteIntel corporate-ownership graph
---

# MANNIX HENRY III

**Type:** Company  
**Jurisdiction:** US  
**Identifier:** `sec:0001628154`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/f4cc4f6f-27a8-545e-8dcd-d15c78f5fa72  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/f4cc4f6f-27a8-545e-8dcd-d15c78f5fa72  

## Ownership & control

### Holdings / subsidiaries

- **SiriusPoint Ltd** (tenpercentowner) — https://whiteintel.dev/entity/ee04560b-d815-5a8d-bf30-1068a5d53053
- **TALLGRASS ENERGY GP, LP** (tenpercentowner) — https://whiteintel.dev/entity/7d2e82d2-4bb4-5c22-aaa0-1d4b88945906

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **MANNIX HENRY III**. Human view: https://whiteintel.dev/entity/f4cc4f6f-27a8-545e-8dcd-d15c78f5fa72 · Structured JSON: https://whiteintel.dev/api/public/dossier/f4cc4f6f-27a8-545e-8dcd-d15c78f5fa72._

_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"._