§16§§This book constitutes the proceedings of the 32nd European MPI Users' Group Meeting, EuroMPI 2025, held in Charlotte, NC, USA, during October 1 October 3, 2025.§§The 10 full papers presented in this book were carefully reviewed and selected from 16 submissions. EuroMPI is the premier forum for users, developers, and researchers to exchange ideas on MPI and its applications.§ §04§§.- On the Potential of Compression Hiding in MPI Applications.§§.- Implementing True MPI Sessions and Evaluating MPI Initialization Scalability.§§.- Layout-Agnostic MPI Abstraction for Distributed Computing in Modern C++.§§.- Verifying MPI API Usage Requirements with Contracts.§§.- Review of MPI Continuations and Their Integration into PMPI Tools.§§.- MPI Finally Needs to Deal with Threads.§§.- Performance analysis of Open MPI on AMR applications over Slingshot-11.§§.- Examining MPI and its Extensions for Asynchronous Multithreaded Communication.§§.- Extending the SPMD IR for RMA Models and Static Data Race Detection.§§.- Concepts for designing modern C++ interfaces for MPI.§
