| Prof Dr | Samuel | Oluwafemi | University of Johannesburg | Targeted Cancer Therapy | South Africa | Best Researcher Award | |
| Dr | Andrew | Omame | Federal University of Technology Owerri | Cancer Science | Nigeria | Young Scientist Award | |
| Prof | Ola | Omran | Qassim University | Cancer Science | Saudi Arabia | Best Researcher Award | |
| Dr | Mervat | Omran | National Cancer Institute, Cairo University | Cancer Cell Biology | Egypt | Women Researcher Award | |
| Prof | Ola | Omran | College of Medicine- Qassim University | Cancer Biomarkers | Saudi Arabia | Best Researcher Award | |
| Assoc Prof Dr | CHERN EIN | OON | Institute for Research in Molecular Medicine | Oncology Therapeutics and Novel Approaches | Malaysia | Best Research Award | |
| Prof | Stina | Oredsson | Lund University | Cancer Cell Biology | Sweden | Best Research Award | |
| Dr. | Clement | OSEI AKOTO | Kwame Nkrumah University of Science and Technology | Cancer Science | Ghana | Best Researcher Award | |
| Assoc Prof Dr | Hamid | Osman | Consortium Saudi Arabia - Al Taif University | Cancer Science | Saudi Arabia | Best Researcher Award | |
| Dr | Abdoul Karim | OUATTARA | CERBA/LABIOGENE | Pharmaco-Oncology | Burkina Faso | Best Researcher Award | |
| Prof. | Wenhao | Ouyang | Sun Yat-Sen Memorial Hospital | Tumor Immunology | China | Best Researcher Award | pencis.com |
| Prof Dr | Camila | Paccola | Federal University of Sao Paulo | Others | Brazil | Best Research Award | |
| Prof | Elisabetta | Panza | Department of Pharmacy | Cancer Cell Biology | Italy | Best Researcher Award | |
| Prof | Evangelos | Paraskevaidis | University of Ioannina | Oncology Management and Prevention | Greece | Best Researcher Award | |
| Prof | Hye Yun | Park | Samsung Medical Center | Oncology Therapy | South Korea | Best Researcher Award | |
| Prof. Dr. | Johnathan | Parreira | Medicine departament of Federal University of Rondonia, Brazil | Cancer Biomarkers | Brazil | Best Researcher Award | |
| Prof | Vincenzo | Parrino | University of Messina | Tumour Immunology | Italy | Best Extension Activity Award | |
| Dr | Patrizia | Pasanisi | Fondazione ISCCS Istituto Nazionale dei Tumori di Milano | Oncology Management and Prevention | Italy | Best Researcher Award | |
| Ms | Atena | Pasha | University of Tehran | Others | Iran | Best Researcher Award | |
| Mr | Pezhman | Pasyar | Tehran University of Medical Sciences | Others | Iran | Best Research Award | |