---
title: "ATI Physical Therapy, Inc. — Ownership Dossier"
canonical: https://whiteintel.dev/entity/b87f1a54-bdad-5d00-b165-d0d38aea56fb
json: https://whiteintel.dev/api/public/dossier/b87f1a54-bdad-5d00-b165-d0d38aea56fb
identifier: sec:0001815849
jurisdiction: US
risk: Medium
source: WhiteIntel corporate-ownership graph
---

# ATI Physical Therapy, Inc.

**Type:** Company  
**Jurisdiction:** [US](https://whiteintel.dev/jurisdictions/us)  
**Identifier:** `sec:0001815849`  
**Risk level:** Medium  
**Canonical dossier:** https://whiteintel.dev/entity/b87f1a54-bdad-5d00-b165-d0d38aea56fb  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/b87f1a54-bdad-5d00-b165-d0d38aea56fb  

## Ownership & control

### Owners / controllers

- **RICHARDS BRUCE J** (tenpercentowner) — https://whiteintel.dev/entity/308df194-a71f-5e74-8366-dd53b8ffa93f
- **KNIGHTHEAD ANNUITY & LIFE ASSURANCE CO** (tenpercentowner) — https://whiteintel.dev/entity/06c230f7-c26e-5785-86c5-5411ebd0910f
- **MARATHON ASSET MANAGEMENT GP, L.L.C.** (tenpercentowner) — https://whiteintel.dev/entity/87d2f6b5-e190-56be-89b1-9b1556f5dcd0
- **MARATHON ASSET MANAGEMENT LLC** (tenpercentowner) — https://whiteintel.dev/entity/e5899c41-cc52-533b-8750-ebd1c6544134
- **KNIGHTHEAD MASTER FUND LP** (tenpercentowner) — https://whiteintel.dev/entity/d75e3f65-bcdd-534b-862e-724516e5c72f
- **MARATHON DISTRESSED CREDIT MASTER FUND** (tenpercentowner) — https://whiteintel.dev/entity/e23dcd45-a3c5-5d94-84ba-3eb012169a45
- **KHSU SPV LP LLC** (tenpercentowner) — https://whiteintel.dev/entity/d3708526-5907-50db-99b8-853ae7a29c43
- **KNIGHTHEAD CAPITAL MANAGEMENT, LLC** (tenpercentowner) — https://whiteintel.dev/entity/bd85b5c3-e162-5f5f-b2ac-2959cd14e013
- **MARATHON STEPSTONE MASTER FUND LP** (tenpercentowner) — https://whiteintel.dev/entity/4c3bce68-c8d4-5efa-8b23-bf2e54119ce9
- **KH ANKLE LLC** (tenpercentowner) — https://whiteintel.dev/entity/5db2d08b-920a-50af-99dd-fb1c32b81106
- **KNIGHTHEAD DISTRESSED OPPORTUNITIES FUND, LP** (tenpercentowner) — https://whiteintel.dev/entity/db23a0d1-85c6-5179-80af-7ab8e284eec6
- **MCSP SUB, LLC** (tenpercentowner) — https://whiteintel.dev/entity/36194007-9ff2-5028-a9b2-17335d7b229c
- **KNIGHTHEAD (NY) FUND, LP** (tenpercentowner) — https://whiteintel.dev/entity/af7d3598-9893-5552-a6f3-3b1dbf819919
- **HANOVER LOUIS** (tenpercentowner) — https://whiteintel.dev/entity/20b92cfe-65e8-508f-a210-c1c08b1ee86e
- **ADVENT INTERNATIONAL GP, LLC** (tenpercentowner) — https://whiteintel.dev/entity/43495a33-84b4-5aa2-b46d-0955aa0aa068
- **OMI PARTNERSHIP HOLDINGS LTD.** (tenpercentowner) — https://whiteintel.dev/entity/aa6e5e16-e94e-5b76-b201-6f0335af3bee
- **ONEX CAPITAL SOLUTIONS GP, LLC** (tenpercentowner) — https://whiteintel.dev/entity/3191dc30-711a-53b9-9b1b-3cb9d7c19e8d
- **ONEX CAPITAL SOLUTIONS HOLDINGS, LP** (tenpercentowner) — https://whiteintel.dev/entity/bb53c117-40a8-570d-a857-c79d9bcf6138
- **SCHWARTZ GERALD W** (tenpercentowner) — https://whiteintel.dev/entity/a8383add-a419-58c6-b8ed-ffa5b23f8922
- **ONEX CORP** (tenpercentowner) — https://whiteintel.dev/entity/2f496736-412d-514c-89eb-f57175ddf1c4
- **ONEX CAPITAL SOLUTIONS GP, LP** (tenpercentowner) — https://whiteintel.dev/entity/271b866d-88a0-5dff-82c7-92c22c938e90
- **WILCO ACQUISITION, LP** (tenpercentowner) — https://whiteintel.dev/entity/1fbeb50f-a4c7-5b11-84ae-3500eb86384d
- **ADVENT INTERNATIONAL, L.P.** (tenpercentowner) — https://whiteintel.dev/entity/1daea67d-331c-5298-b64a-9f6300c3215e
- **WILCO GP, INC.** (tenpercentowner) — https://whiteintel.dev/entity/7e94f8d4-ab58-5e81-a09c-35528ccdef16
- **ADVENT INTERNATIONAL GPE VII-A LIMITED PARTNERSHIP** (tenpercentowner) — https://whiteintel.dev/entity/4a790de7-1f54-5816-adde-530f9160a931
- **ADVENT INTERNATIONAL GPE VII-F LIMITED PARTNERSHIP** (tenpercentowner) — https://whiteintel.dev/entity/0668ddd3-adf8-5987-8d8f-f9cb8953317a
- **ADVENT PARTNERS GPE VII 2014 LIMITED PARTNERSHIP** (tenpercentowner) — https://whiteintel.dev/entity/c7d88641-1378-582f-92a4-0dece3d1d1eb
- **ADVENT PARTNERS GPE VII-A LIMITED PARTNERSHIP** (tenpercentowner) — https://whiteintel.dev/entity/6ae14a5a-7ec4-502f-be1a-28960c654f28
- **ADVENT INTERNATIONAL GPE VII-E LIMITED PARTNERSHIP** (tenpercentowner) — https://whiteintel.dev/entity/86c8eb7d-c1a6-557b-bffa-a37ff3a6b9e8
- **FORTRESS ACQUISITION SPONSOR II LLC** (tenpercentowner) — https://whiteintel.dev/entity/e21e21c6-a9b9-5a8f-97b7-2fb073854e3c
- **ADVENT PARTNERS GPE VII LIMITED PARTNERSHIP** (tenpercentowner) — https://whiteintel.dev/entity/1d6735ef-2b54-5859-9d01-79744844480b
- **ADVENT PARTNERS GPE VII-A 2014 LIMITED PARTNERSHIP** (tenpercentowner) — https://whiteintel.dev/entity/ef8871b2-39a3-582d-a3db-6b1ff48f5bf3
- **ADVENT INTERNATIONAL GPE VII-D LIMITED PARTNERSHIP** (tenpercentowner) — https://whiteintel.dev/entity/86ac2597-3a64-531f-ab37-152ca637a8cf
- **GPE VII ATI CO-INVESTMENT LIMITED PARTNERSHIP** (tenpercentowner) — https://whiteintel.dev/entity/36aa56eb-a75a-5a79-a992-a82ee941bea0
- **ADVENT INTERNATIONAL GPE VII-B LIMITED PARTNERSHIP** (tenpercentowner) — https://whiteintel.dev/entity/635e5b60-b332-5036-b6da-9d04f9c7ad43
- **ADVENT PARTNERS GPE VII-A CAYMAN LIMITED PARTNERSHIP** (tenpercentowner) — https://whiteintel.dev/entity/2992ef73-6fb2-5a24-8736-9824a593c994
- **ADVENT INTERNATIONAL GPE VII, LLC** (tenpercentowner) — https://whiteintel.dev/entity/d0483fe0-4626-5bb2-ba6e-371d2fa48e5c
- **ADVENT PARTNERS GPE VII 2014 CAYMAN LIMITED PARTNERSHIP** (tenpercentowner) — https://whiteintel.dev/entity/e76396ed-320e-5d77-a787-a57b8b10a3bc
- **ADVENT PARTNERS GPE VII-B CAYMAN LIMITED PARTNERSHIP** (tenpercentowner) — https://whiteintel.dev/entity/2c5d7684-2ebe-5db7-b5cb-79123e384f98
- **ADVENT INTERNATIONAL GPE VII LIMITED PARTNERSHIP** (tenpercentowner) — https://whiteintel.dev/entity/986e0e40-19e0-5327-b209-95880ecc567d
- **ADVENT PARTNERS GPE VII-A 2014 CAYMAN LIMITED PARTNERSHIP** (tenpercentowner) — https://whiteintel.dev/entity/52175e9f-3a2e-5704-b6d4-3b72100a4ce4
- **ADVENT INTERNATIONAL GPE VII-C LIMITED PARTNERSHIP** (tenpercentowner) — https://whiteintel.dev/entity/87c11fa2-8f0a-5d95-86ed-a197d5fef5cc
- **ADVENT INTERNATIONAL GPE VII-G LIMITED PARTNERSHIP** (tenpercentowner) — https://whiteintel.dev/entity/3e562c84-df3b-5b2b-89f7-5613ab84d9cd
- **GPE VII GP S.A.R.L.** (tenpercentowner) — https://whiteintel.dev/entity/68d37eac-02db-5020-991b-ba3bfce397b9
- **ADVENT PARTNERS GPE VII CAYMAN LIMITED PARTNERSHIP** (tenpercentowner) — https://whiteintel.dev/entity/8521908b-9d79-5a2b-bbb7-2d05a5d869e0
- **ADVENT INTERNATIONAL GPE VII-H LIMITED PARTNERSHIP** (tenpercentowner) — https://whiteintel.dev/entity/d468ec87-00f3-5dfd-b414-28974e546905
- **GPE VII GP LIMITED PARTNERSHIP** (tenpercentowner) — https://whiteintel.dev/entity/79bad71c-3641-5592-826e-3c124ba22c61
- **PRINCIPAL HOLDINGS I LP** (tenpercentowner) — https://whiteintel.dev/entity/dcc4f8b5-00d2-5b1c-b1ce-5535edeec30e

### UBO chain (walk to the ultimate owner)

A **114-step** ownership/control chain to the ultimate beneficial owner is resolved for this entity. The full cited chain unlocks with a paid API key or a one-off dossier — https://whiteintel.dev/pricing.

## Get the full, resolved dossier (agent-callable)

The above is the free teaser. The resolved **multi-hop UBO chain**, ownership **%**, full **financial history**, itemised **assets** and the hop-by-hop **exposure path** are the paid depth — callable as tools from your agent:

```bash
npx -y @whiteintel/mcp-server   # then: get_dossier · trace_ownership_path · check_offshore_exposure
```

Or unlock a one-off cited dossier for **ATI Physical Therapy, Inc.** — https://whiteintel.dev/entity/b87f1a54-bdad-5d00-b165-d0d38aea56fb · pricing https://whiteintel.dev/pricing.

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **ATI Physical Therapy, Inc.**. Human view: https://whiteintel.dev/entity/b87f1a54-bdad-5d00-b165-d0d38aea56fb · Structured JSON: https://whiteintel.dev/api/public/dossier/b87f1a54-bdad-5d00-b165-d0d38aea56fb._

_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"._