---
title: "SIGLER MARY ANN — Ownership Dossier"
canonical: https://whiteintel.dev/entity/4ed12bfb-885e-57cc-bc0a-170cf93dd314
json: https://whiteintel.dev/api/public/dossier/4ed12bfb-885e-57cc-bc0a-170cf93dd314
identifier: sec:0001490592
jurisdiction: US
risk: Low
source: WhiteIntel corporate-ownership graph
---

# SIGLER MARY ANN

**Type:** Company  
**Jurisdiction:** [US](https://whiteintel.dev/jurisdictions/us)  
**Identifier:** `sec:0001490592`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/4ed12bfb-885e-57cc-bc0a-170cf93dd314  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/4ed12bfb-885e-57cc-bc0a-170cf93dd314  

## Ownership & control

### Holdings / subsidiaries

- **MCGRAW HILL, INC.** (director) — https://whiteintel.dev/entity/c2a7b7f7-0bf1-5fc2-9a44-581636a2ecd0
- **Ingram Micro Holding Corp** (director) — https://whiteintel.dev/entity/155c4a82-09fd-5758-981b-cb2a2a636b2f
- **KEY ENERGY GROUP INC** (director) — https://whiteintel.dev/entity/0376ac45-e68f-59c4-8623-501e2adf0d39
- **Ryerson Holding Corp** (director) — https://whiteintel.dev/entity/63249cf4-37ef-51af-8907-de23de6c9287

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **SIGLER MARY ANN**. Human view: https://whiteintel.dev/entity/4ed12bfb-885e-57cc-bc0a-170cf93dd314 · Structured JSON: https://whiteintel.dev/api/public/dossier/4ed12bfb-885e-57cc-bc0a-170cf93dd314._

_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"._