
Drew Baglino spent 18 years at Tesla building the guts of the electric age - the Model S powertrain, the Powerwall and Megapack, the 4680 battery cell and a clean-sheet 50 GWh factory in Texas. In 2024 he walked away as Senior Vice President of Powertrain and Energy and aimed his next act at the one piece of grid hardware almost nobody had touched in a century: the transformer. His startup, Heron Power, builds software-controlled solid-state transformers and in February 2026 raised a $140 million Series B co-led by Andreessen Horowitz and Breakthrough Energy Ventures to build a 40 GW U.S. factory. He also quietly founded a residential heat-pump company, Sadi Thermal Machines.
Mateo Jaramillo is the co-founder and CEO of Form Energy, a Somerville, Massachusetts company building 100-hour iron-air batteries that store electricity by rusting and un-rusting iron. After more than seven years at Tesla, where he started and ran the stationary storage business behind the Powerwall and Powerpack, he co-founded Form in 2017 on a contrarian bet: skip lithium, find a chemistry cheap enough to store power for days instead of hours. The company has raised over $1.3 billion, revived an abandoned West Virginia steel mill as its first factory, and signed a roughly $1 billion deal with Google for the world's largest battery system.