---
title: "MARATHON STEPSTONE MASTER FUND LP — Ownership Dossier"
canonical: https://whiteintel.dev/entity/4c3bce68-c8d4-5efa-8b23-bf2e54119ce9
json: https://whiteintel.dev/api/public/dossier/4c3bce68-c8d4-5efa-8b23-bf2e54119ce9
identifier: sec:0001920234
jurisdiction: US
risk: Low
source: WhiteIntel corporate-ownership graph
---

# MARATHON STEPSTONE MASTER FUND LP

**Type:** Company  
**Jurisdiction:** [US](https://whiteintel.dev/jurisdictions/us)  
**Identifier:** `sec:0001920234`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/4c3bce68-c8d4-5efa-8b23-bf2e54119ce9  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/4c3bce68-c8d4-5efa-8b23-bf2e54119ce9  

## Ownership & control

### Holdings / subsidiaries

- **ATI Physical Therapy, Inc.** (director) — https://whiteintel.dev/entity/b87f1a54-bdad-5d00-b165-d0d38aea56fb
- **ATI Physical Therapy, Inc.** (tenpercentowner) — https://whiteintel.dev/entity/b87f1a54-bdad-5d00-b165-d0d38aea56fb

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **MARATHON STEPSTONE MASTER FUND LP**. Human view: https://whiteintel.dev/entity/4c3bce68-c8d4-5efa-8b23-bf2e54119ce9 · Structured JSON: https://whiteintel.dev/api/public/dossier/4c3bce68-c8d4-5efa-8b23-bf2e54119ce9._

_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"._