| March 1, 2021 | Martin Bidlingmaier | The multiverse model of dependent type theory |
| March 8, 2021 | Cancelled | |
| March 15, 2021 | Magnus Baunsgaard Kristensen | A model of Clocked Cubical Type Theory |
| March 22, 2021 | Philip G. Haselwater | SSProve: A Foundational Framework for Modular Cryptographic Proofs in Coq |
| March 29, 2021 | No seminar - Easter break | |
| April 5, 2021 | No seminar - Easter Monday | |
| April 12, 2021 | Cancelled | |
| April 19, 2021 | Neel Krishnaswami | Adjoint Reactive GUI Programming |
| April 26, 2021 | Steffan Sølvsten Jørgensen | Efficient Binary Decision Diagram Manipulation in External Memory |
| May 3, 2021 | Simon Wimmer | Certification of timed systems model checking: past, now, and future |
| May 10, 2021 | Guilhem JABER | Complete compositional relational reasoning for state and control |
| May 17, 2021 | Cancelled | |
| May 24, 2021 | No seminar - public holiday | |
| May 31, 2021 | Dan Frumin | Semantic approach to cut elimination |
| June 7, 2021 | Alejandro Aguirre | Relational logics for probabilistic programs |
| June 14, 2021 | Nikolaj Sidorenco | Formal security analysis of MPC-in-the-head zero-knowledge protocols |
| June 21, 2021 | Cristina Matache | Recursion and sequentiality in categories of sheaves |
| September 10, 2021 | Troels Henriksen | Making pigs fly: design and implementation of the Futhark language |
| September 13, 2021 | Cancelled | |
| September 20, 2021 | Maxime Legoupil | Categorical models for focused lambda-calculus |
| September 27, 2021 | Cancelled | |
| October 4, 2021 | Alban Reynaud | A parametrized bisimulation for interaction trees |
| October 11, 2021 | Cancelled | |
| October 18, 2021 | No seminar - Autumn break | |
| October 25, 2021 | Boel Nelson | On the accuracy of differentially private algorithms |
| November 1, 2021 | Jon Sterling | Between abstraction and composition |
| November 8, 2021 | Pierre Cagne | Consequences of univalence on the symmetries of the spheres |
| November 15, 2021 | Jean Pichon-Pharabod | Trying to make relaxed concurrency memory models more accessible: the case of Armv8 |
| November 22, 2021 | Jonas Kastberg Hinrichsen | Machine-Checked Semantic Session Typing |
| November 29, 2021 | Patricia Johann | Deep Induction |
| December 6, 2021 | No seminar | |
| December 13, 2021 | Aslan Askarov | Are fine-grained and coarse-grained dynamic information flow control always equally expressive? |
| December 16, 2021 | Christoph Matheja | Towards a Language for Automated Verification of Probabilistic Programs |