BEBloom Energy
bloomenergy.com
HQ: San Jose, California, USAPUBLIC SOURCEFounded: 2001PUBLIC SOURCEOwnership: Public (NYSE: BE), S&P 500 componentPUBLIC SOURCEBloom Energy makes solid oxide fuel cells that generate electricity on site for data centers, manufacturing and other commercial users.
EEERock (Enchanted Rock)
erock.com
HQ: —NO DATAFounded: 2006COMPANY WEBSITEOwnership: PrivateCOMPANY WEBSITEERock (Enchanted Rock) provides electrical resiliency-as-a-service: onsite natural gas and cleaner-fuel microgrids that keep businesses, critical infrastructure and communities running during grid outages.
FHQ: —NO DATAFounded: —NO DATAOwnership: "A Siemens and AES company" (per company site)COMPANY WEBSITEFluence supplies grid-scale energy storage and cloud software for renewables and storage.
FEForm Energy
formenergy.com
HQ: Somerville, Massachusetts, USAPUBLIC SOURCEFounded: 2017PUBLIC SOURCEOwnership: Private (Series G $750M financing announced 2026)COMPANY WEBSITEForm Energy is an American company developing multi-day energy storage for the grid.
HEHitachi Energy
hitachienergy.com
HQ: Zurich, SwitzerlandPUBLIC SOURCEFounded: 2021 name (formerly Hitachi ABB Power Grids)PUBLIC SOURCEOwnership: Subsidiary of Hitachi Ltd.PUBLIC SOURCEHitachi Energy is a Zurich-based energy technology company and subsidiary of Hitachi.
OHQ: Santa Clara, California, USAPUBLIC SOURCEFounded: 2013PUBLIC SOURCEOwnership: Public (NYSE: OKLO)PUBLIC SOURCEOklo is a NYSE-listed advanced nuclear company developing fast fission power plants, starting with its Aurora powerhouse.
SESiemens Energy
siemens-energy.com
HQ: Munich, GermanyPUBLIC SOURCEFounded: 2020PUBLIC SOURCEOwnership: Public (FWB: ENR), DAX componentPUBLIC SOURCESiemens Energy is a German energy technology company spun out of Siemens in 2020, covering power generation, grid technology and wind power through Siemens Gamesa.
