| Jirí Adámek (Czech Technical Univ., Prague, Czech Republic) | Terminal coalgebras in graduated categories | 2025-11-20 | 
| Alfredo Costa (CMUC, Univ. Coimbra) | Open multiplication in relatively free profinite semigroupoids | 2025-06-17 | 
| Walter Tholen (York Univ., Toronto, Canada) | Norms for vectors, linear operators and morphisms of categories, and Cauchy convergence for them | 2025-05-20 | 
| Andrea Montoli (Univ. degli Studi di Milano, Italy) | Describing good objects in categories with weak algebraic properties | 2025-05-13 | 
| Norihiro Yamada (CMUC, Univ. Coimbra) | An excursion from logic and computation to algebra, topology and geometry via combinatorics | 2025-04-22 |