| | | | | | | | |
| Name of Subsidiary | | Jurisdiction of Incorporation/Organization |
| BP USA Holdings, LLC | | United States |
| Cache Holdings Limited | | Bermuda |
| Carnforth Limited | | Bermuda |
| CPEC, LLC | | United States |
| EFHI GP Limited | | Ireland |
| ELP 2025 GP Limited | | Ireland |
| Endo Biologics Limited | | Ireland |
| Endo Enterprise, Inc. | | United States |
| Endo Finance Holdings LP | | United States |
| Endo LP | | United States |
| Endo Operations Limited | | Ireland |
| Endo USA, Inc. | | United States |
| Ikaria Australia Pty Ltd | | Australia |
| Ikaria Canada Inc. | | Canada |
| Infacare Pharmaceutical Corporation | | United States |
| INO Therapeutics LLC | | United States |
| Keenova International Holdings LLC | | United States |
| Keenova Therapeutics Group Limited | | Ireland |
| Keenova Therapeutics Public Limited Company | | Ireland |
| KT Finance Inc. | | United States |
| Ludlow LLC | | United States |
| MAK LLC | | United States |
| Mallinckrodt ARD Holdings Inc. | | United States |
| Mallinckrodt ARD Holdings Limited | | United Kingdom |
| Mallinckrodt ARD LLC | | United States |
| Mallinckrodt Brand Pharmaceuticals LLC | | United States |
| Mallinckrodt Canada Cooperatie U.A. | | Netherlands |
| Mallinckrodt CB LLC | | United States |
| Mallinckrodt Critical Care Finance LLC | | United States |
| Mallinckrodt Equinox Finance LLC | | United States |
| Mallinckrodt Equinox Limited | | United Kingdom |
| Mallinckrodt Finance Management Ireland Limited | | Ireland |
| Mallinckrodt Group S.à r.l. | | Luxembourg |
| Mallinckrodt Group S.à r.l., Luxembourg (LU) Schaffhausen Branch | | Switzerland |
| Mallinckrodt Holdings GmbH | | Switzerland |
| Mallinckrodt Hospital Products Inc. | | United States |
| Mallinckrodt International Finance SA | | Luxembourg |
| Mallinckrodt International Holdings S.à r.l. | | Luxembourg |
| Mallinckrodt Lux IP S.à r.l. | | Luxembourg |
| Mallinckrodt Manufacturing LLC | | United States |
| Mallinckrodt Medical Holdings (UK) Limited | | United Kingdom |
| Mallinckrodt Medical Holdings (UK) Limited, Zweigniederlassung Deutschland (the German Branch) | | Germany |
| Mallinckrodt Petten Holdings B.V. | | Netherlands |
| Mallinckrodt Pharma IP Trading Limited | | Ireland |
| Mallinckrodt Pharma K.K. | | Japan |
| Mallinckrodt Pharmaceuticals Ireland Limited | | Ireland |
| Mallinckrodt Pharmaceuticals Limited | | United Kingdom |
| Mallinckrodt Quincy S.à r.l. | | Luxembourg |
| Mallinckrodt SAG Holdings GmbH | | Switzerland |
| Mallinckrodt UK Finance LLP | | United Kingdom |