- General Electric Co.
- Landis+Gyr Group AG
- Sensus USA Inc. (Xylem Inc
- Echelon Corporation
- Diehl Stiftung & Co. KG
- Wasion Group Holdings
- Elster Group GmbH (Honeywell)
- Kamstrup A/S
- Itron INC.
- Arad Group
- Zenner International GmbH & CO KG