| | | | | |
| Name | State/Jurisdiction of Incorporation |
| Jazz Pharmaceuticals Ireland Limited | Ireland |
| Jazz Financing I DAC | Ireland |
| Jazz Pharmaceuticals Operations UK Limited | United Kingdom |
| Jazz Pharmaceuticals, Inc. | Delaware |
| Celator Pharmaceuticals Inc. | Delaware |
| Jazz Pharmaceuticals Research UK Limited | United Kingdom |
| Gentium S.r.l. | Italy |
| Jazz Pharmaceuticals UK Holdings Limited | United Kingdom |
| Jazz Securities DAC | Ireland |
| Jazz Financing Holdings Limited | Ireland |
| Jazz Financing Lux S.à.r.l | Luxembourg |
| Jazz Pharmaceuticals International Limited | Ireland |
| Jazz Investments Europe Limited | Malta |
| Jazz Capital Limited | Ireland |
| Jazz Pharmaceuticals UK Limited | United Kingdom |
| GW Pharmaceuticals Limited | United Kingdom |