| Fateme Abbasi | University of Wroclaw | 10.10.2021 – 20.11.2021 |
| Kristóf Bérczi | Eötvös Loránd University | 14.11.2021 – 27.11.2021 |
| Jaroslaw Byrka | University of Wroclaw | 14.11.2021 – 20.11.2021 |
| Federica Cecchetto | ETH Zurich | 14.11.2021 – 19.11.2021 |
| Karthekeyan Chandrasekaran | University of Illinois, Urbana-Champaign | 12.11.2021 – 19.12.2021 |
| 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 |
| Sally Dong | University of Washington | 03.10.2021 – 17.12.2021 |
| Franziska Eberle | LSE London | 10.10.2021 – 03.12.2021 |
| Fritz Eisenbrand | EPFL | 14.11.2021 – 16.11.2021 |
| Yuri Faenza | Columbia University | 14.11.2021 – 19.11.2021 |
| Andreas Feldmann | Charles University | 14.11.2021 – 11.12.2021 |
| Samuel Fiorini | Université libre de Bruxelles | 12.11.2021 – 20.11.2021 |
| Fedor Fomin | Institutt for informatikk | 15.11.2021 – 11.12.2021 |
| Michel Goemans | MIT | 12.11.2021 – 20.11.2021 |
| Fabrizio Grandoni | IDSIA, USI-SUPSI | 14.11.2021 – 19.11.2021 |
| Hung Hoang | ETH Zurich | 08.11.2021 – 03.12.2021 |
| Christoph Hunkenschröder | TU Berlin | 01.11.2021 – 17.12.2021 |
| Dylan Hyatt-Denesik | Technical University of Eindhoven | 14.11.2021 – 19.11.2021 |
| Afrouz Jabal Ameli | TU Eindhoven | 14.11.2021 – 19.11.2021 |
| 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 |
| Rasmus Kyng | ETH Zurich | 10.10.2021 – 21.11.2021 |
| Roie Levin | Carnegie Mellon University | 30.09.2021 – 11.12.2021 |
| Georg Loho | University of Twente | 06.09.2021 – 17.12.2021 |
| Jannik Matuschke | KU Leuven | 14.11.2021 – 19.11.2021 |
| Nicole Megow | University of Bremen | 15.11.2021 – 19.11.2021 |
| Matthias Mnich | Hamburg University of Technology | 06.09.2021 – 17.12.2021 |
| Sarah Morell | Technische Universität Berlin | 12.11.2021 – 19.11.2021 |
| 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 | 15.11.2021 – 19.11.2021 |
| Sebastian Pokutta | Zuse Institut Berlin | 06.09.2021 – 17.12.2021 |
| Adam Polak | EPFL | 15.11.2021 – 11.12.2021 |
| Thomas Rothvoss | University of Washington | 14.11.2021 – 26.11.2021 |
| Vibha Sahlot | Charles University | 30.10.2021 – 18.12.2021 |
| Laura Sanità | TU Eindhoven | 06.09.2021 – 17.12.2021 |
| András Sebő | CNRS, Laboratoire G-SCOP, UNIV Grenoble-Alpes | 31.10.2021 – 30.11.2021 |
| Federico Soldà | ETH Zurich | 14.11.2021 – 19.11.2021 |
| Céline Swennenhuis | Eindhoven University of Technology | 14.11.2021 – 15.12.2021 |
| Vera Traub | ETH | 14.11.2021 – 10.12.2021 |
| Laura Vargas Koch | ETH Zürich | 15.11.2021 – 03.12.2021 |
| 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 |
| Andreas Wiese | VU Amsterdam | 14.11.2021 – 17.11.2021 |
| Fei Wu | KU Leuven | 18.09.2021 – 12.12.2021 |
| Sorrachai Yingchareonthawornchai | Aalto University | 12.09.2021 – 17.12.2021 |
