InPEx is a joint international initiative between Europe, Japan, and the United States, bringing together the leading organisations in the field of High-Performance Computing (HPC).

InPEx is led by a Steering Committee composed of:

• For Europe: Jean-Yves BERTHOU (INRIA), Sergi GIRONA (BSC) and Bernd MOHR (JSC)
• For Japan: Satoshi MATSUOKA (RIKEN, representing Japan’s national flagship supercomputing initiatives)
• For the United States: Pete BECKMAN (Northwestern University) and Jack DONGARRA (University of Tennessee)

InPEx has received direct financial support from the NumPEx Programme (ANR), BSC, and the InPEx2025 International Workshop Japan Executive Committee.

The Project Office is operated by Neovia Innovation.

The following organisations have participated in InPEx:

AIST	AMD	ANL	BSC	CEA	CECAM	CERN	CINECA	CNAF-INFN	CNRS
CSC	DoE	ECMWF	EPCC-University. Edinburgh	ETH Zürich	ETP4HPC	European Commission	GaTech	GENCI	HLRS
INFN	INRIA	IPGP	IRISA-U.Rennes	IRIT	ISI	JSC	LBNL	LLNL	MPCDF
NAISE	NCSA	Neovia Innovation	NSF	NU	Observatoire de Paris – PSL	ORNL	OSU	PCS	R-CCS
Sandia	Science Tokyo	SiPearl	SLAC National Accelerator Laboratory	Supercomputing Japan Incorporated Association	TACC	TUM	UNISTRA	University. Aizu	University. California
University. California San Diego	University. Florida International	University. Hokkaido	University. Illinois	University. Kyoto	University. Kyushu	University. Nagoya	University. Osaka	University. Princeton	University. Rennes 1
University. Tennessee, Knoxville	University. Tohoku	University. Tokyo	University. Tsukuba	University. Utah