| Xavier Allamigeon | INRIA and Ecole Polytechnique | 10.09.2021 – 10.10.2021 |
| Alexander Black | UC Davis | 19.09.2021 – 27.09.2021 |
| Deeparnab Chakrabarty | Dartmouth College | 10.09.2021 – 20.10.2021 |
| Parinya Chalermsook | Department of Computer Science Aalto University | 11.09.2021 – 09.10.2021 |
| Gerard Cornuejols | Carnegie Mellon University | 06.09.2021 – 10.12.2021 |
| Jana Cslovjecsek | EPFL | 07.09.2021 – 11.12.2021 |
| Daniel Dadush | CWI | 07.09.2021 – 24.12.2021 |
| Jesus De Loera | University of California | 19.09.2021 – 30.09.2021 |
| Fritz Eisenbrand | EPFL | 18.09.2021 – 22.09.2021 |
| Haotian Jiang | University of Washington | 23.09.2021 – 20.10.2021 |
| Nathan Klein | University of Washington | 10.09.2021 – 21.11.2021 |
| Zhuan Khye Koh | London School of Economics and Political Science | 06.09.2021 – 17.12.2021 |
| Georg Loho | University of Twente | 06.09.2021 – 17.12.2021 |
| Matthias Mnich | Hamburg University of Technology | 06.09.2021 – 17.12.2021 |
| Bento Natura | London School of Economics and Political Science | 10.09.2021 – 17.12.2021 |
| Jesper Nederlof | Utrecht University | 06.09.2021 – 17.12.2021 |
| Alantha Newman | Laboratoire G-SCOP | 15.09.2021 – 11.12.2021 |
| Neil Olver | LSE London | 06.09.2021 – 03.12.2021 |
| Britta Peis | RWTH Aachen University | 20.09.2021 – 01.10.2021 |
| Michał Pilipczuk | University of Warsaw | 06.09.2021 – 29.10.2021 |
| Sebastian Pokutta | Zuse Institut Berlin | 06.09.2021 – 17.12.2021 |
| Laura Sanità | TU Eindhoven | 06.09.2021 – 17.12.2021 |
| László Végh | LSE London | 01.09.2021 – 28.11.2021 |
| Jens Vygen | Universität Bonn | 06.09.2021 – 17.12.2021 |
| Karol Wegrzycki | Saarland University and Max Planck Institute for Informatics | 06.09.2021 – 17.12.2021 |
| Stefan Weltge | Technische Universität München | 19.09.2021 – 22.09.2021 |
| Fei Wu | KU Leuven | 18.09.2021 – 12.12.2021 |
| Sorrachai Yingchareonthawornchai | Aalto University | 12.09.2021 – 17.12.2021 |
