This material is part of the data release associated with version 4.0 of the Gravitational-Wave Transient Catalog (GWTC-4.0), from the LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration. For more information, see the papers describing the catalog (introduction, methods, results), the related material linked from this page, and the GWTC-4.0 data release documentation (www.gw-openscience.org/GWTC-4.0/). GWTC-4.0: Constraints on the Cosmic Expansion Rate and Modified Gravitational-wave Propagation This page includes the data products associated with the paper "GWTC-4.0: Constraints on the Cosmic Expansion Rate and Modified Gravitational-wave Propagation" from the LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration. For a description of the data distribution files, please refer to the README.md file.