| Company Name | Entity type | Parent/Subsidiary/Independent | Headquarters | No. of Employees | Annual Revenue ($M) | |
|---|---|---|---|---|---|---|
| Varian Medical Systems Inc | Private | Subsidiary (of Siemens Healthineers AG) | United States of America | XYZ | 3,233 | |
| Proton Automotive Technology Co Ltd | Private | Independent | China | XYZ | XYZ | |
| Proton Energy Ltd | Private | Independent | Nigeria | XYZ | XYZ | |
| Ion Beam Applications SA | Public | Parent | Belgium | 1,845 | 464 | |
| Proton Energy Systems Inc | Private | Subsidiary (of Nel ASA ) | United States of America | XYZ | XYZ | |
| Proton Motor Power Systems Plc | Public | Parent | United Kingdom | XYZ | XYZ | |
| Proton Motor Fuel Cell GmbH | Private | Subsidiary (of Proton Motor Power Systems Plc ) | Germany | XYZ | XYZ | |
| Proton Group Ltd | Private | Independent | United Kingdom | XYZ | XYZ | |
| Rutherford Health PLC | Private | Independent | United Kingdom | XYZ | XYZ | |
| PROTON Edar Sdn. Bhd. | Private | Subsidiary (of Proton Holdings Berhad ) | Malaysia | XYZ | XYZ | |
| Proton Permskie motory | Private | Independent | Russia | XYZ | XYZ | |
| New York Proton Center | Institution | Independent | United States of America | XYZ | XYZ | |
| Plug Power Inc | Public | Parent | United States of America | 3,868 | 891 | |
| W. L. Gore & Associates Inc | Private | Parent | United States of America | 12,000 | 4,500 | |
| ITM Power Plc | Public | Subsidiary (of Snam SpA) | United Kingdom | 415 | 6 | |
| Paragon Union Berhad | Public | Subsidiary (of AKK Capital Sdn Bhd ) | Malaysia | 467 | 14 | |
| Zhejiang Geely Holding Group Co Ltd | Private | Parent | China | 120,000 | XYZ | |
| Acino International AG | Private | Parent | Switzerland | 2,793 | XYZ | |
| Intellipharmaceutics International Inc | Public | Parent | Canada | 33 | 0 | |
| Proton | Private | Independent | Russia | XYZ | XYZ | |
| Proton Bank S.A. | Private | Independent | Greece | XYZ | XYZ | |
| Proton Green, LLC | Private | Independent | United States of America | XYZ | XYZ | |
| Proton Therapy Center | Institution | Independent | United States of America | XYZ | XYZ | |
| Proton Multimedia, Inc. | Private | Independent | United States of America | XYZ | XYZ | |
| Proton Technologies AG | Private | Parent | Switzerland | XYZ | XYZ | |
| Proton Group AB | Private | Parent | Sweden | XYZ | XYZ | |
| Proton Holdings Berhad | Private | Subsidiary (of DRB-HICOM Bhd ) | Malaysia | XYZ | XYZ | |
| Oklahoma Proton Center | Private | Independent | United States of America | XYZ | XYZ | |
| Proton Laboratories, Inc. | Private | Independent | United States of America | XYZ | XYZ | |
| Proton Ventures BV | Private | Independent | Netherlands | XYZ | XYZ | |
| Proton Capital Corp | Public | Independent | Canada | XYZ | XYZ | |
| Proton Plus doo | Private | Independent | Bosnia and Herzegovina | XYZ | XYZ | |
| Proton Intelligence Inc | Private | Independent | Canada | XYZ | XYZ | |
| Proton Digital Systems, Inc. | Private | Independent | United States of America | XYZ | XYZ | |
| Proton Pharma Pvt Ltd | Private | Parent | India | XYZ | XYZ | |
| IBA Proton Therapy Inc. | Private | Subsidiary (of Ion Beam Applications SA ) | United States of America | XYZ | XYZ | |
| Proton Oil & Gas Corp | Private | Subsidiary (of Petrohawk Energy Corp (Inactive) ) | United States of America | XYZ | XYZ | |
| Proton Therapy USA, Inc. | Private | Independent | United States of America | XYZ | XYZ | |
| Proton Technologies Canada Inc | Private | Independent | Canada | XYZ | XYZ | |
| Dallas Proton Treatment Holdings, LLC | Private | Independent | United States of America | XYZ | XYZ | |
| Proton (Xiamen) Biotechnology Co Ltd | Private | Independent | China | XYZ | XYZ | |
| Georgia Proton Treatment Center, LLC | Private | Independent | United States of America | XYZ | XYZ | |
| Proton Therapy Center Czech Sro | Institution | Independent | Czech Republic | XYZ | XYZ | |
| Maryland Proton Treatment Center, LLC | Private | Joint Venture | United States of America | XYZ | XYZ | |
| Proton.ai | Private | Independent | United States of America | XYZ | XYZ | |
| Protonvda Inc | Private | Independent | United States of America | XYZ | XYZ | |
| Protonet UG | Private | Independent | Germany | XYZ | XYZ | |
| ProtonDx Ltd | Private | Independent | United Kingdom | XYZ | XYZ | |
| ProtonMedia, LLC | Private | Independent | United States of America | XYZ | XYZ | |
| Proton Medical Research Center University of Tsukuba | Institution | Subsidiary (of University of Tsukuba ) | Japan | XYZ | XYZ |
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