Heirloom Carbon Technologies is a San Francisco-based direct air capture company that uses limestone's natural CO2-absorbing properties to pull carbon dioxide permanently out of the atmosphere. Their process accelerates a geological phenomenon that normally takes thousands of years into a 3-day cycle: calcium oxide powder absorbs CO2 from ambient air, becomes limestone, gets heated in a renewable-energy-powered electric kiln to release the captured CO2, and repeats. The captured CO2 is then stored permanently underground or embedded in concrete. Founded in 2020, Heirloom opened America's first commercial DAC facility in Tracy, California in November 2023 and has raised over $354 million to expand capacity toward their goal of removing 1 billion tons of CO2 by 2035.
Eric Faurot is the long-serving CEO of Trellis Group (formerly GreenBiz Group), a B2B media company headquartered in Oakland, California that runs flagship sustainability conferences including VERGE, BLOOM, GreenFin, and Circularity. Over 14 years at the helm, he built GreenBiz into a leading platform for sustainability professionals - combining editorial media, peer networks, and live events - before transitioning to a Growth Leader role in July 2024 when Hana Kajimura succeeded him as CEO. His career traces an arc from tech media event production (COMDEX, INTEROP, Black Hat) to climate and sustainability, making him a rare figure who bridged Silicon Valley-era conference culture with the emerging sustainability economy.
Joe Gebbia co-founded Airbnb in 2008 out of a San Francisco living room - air mattresses, breakfast included - and turned a half-crazy idea into an $85B company. His current venture, Samara, builds factory-assembled, solar-ready backyard homes (ADUs) that go from permit to move-in in under seven months. In early 2025 he became America's first Chief Design Officer, tasked with redesigning the federal government's 27,000 websites. A Rhode Island School of Design graduate with dual majors in graphic and industrial design, Gebbia approaches every problem - housing affordability, government UX, refugee shelter - through the lens of democratic, empathetic design.
Pete May is President and Co-Founder of Trellis Group (formerly GreenBiz Group), the leading media, events, and peer-network platform for corporate sustainability professionals. In 2006, he and Joel Makower purchased GreenBiz.com and built it from a niche newsletter into a global sustainability intelligence brand with flagship conferences, digital media, and professional communities. Drawing on over two decades of B2B publishing leadership at Primedia, CMP, and Miller Freeman, May brought seasoned media-industry discipline to a space that desperately needed it — transforming green business from fringe conversation to boardroom imperative.
Samara is a Redwood City-based prefab housing company building factory-made backyard homes (ADUs) for California homeowners. Spun out of Airbnb by co-founder Joe Gebbia, Samara handles the entire process from design and permitting to manufacturing and installation, with a stated goal of using accessory dwelling units to ease the West Coast housing crunch.
Trellis Group (formerly GreenBiz Group) is an Oakland-based media, events and peer-network company that has spent more than 25 years helping sustainability professionals turn climate ambition into corporate action. Its newsletters, research, and flagship events - GreenBiz, VERGE, Circularity, GreenFin and Bloom - convene the executives, investors and policymakers building the clean economy.
Shashank Samala is the CEO and Co-Founder of Heirloom, the company operating America's first commercial direct air capture facility. A serial entrepreneur who previously co-founded Tempo Automation (raising $100M+ for aerospace-grade electronics manufacturing), he pivoted to carbon removal after a stint as Entrepreneur in Residence at Carbon180. At Heirloom, he's building limestone-based DAC technology to remove one billion tons of CO2 from the atmosphere by 2035, targeting a cost of $50 per ton. The company has raised $354M total, including a $150M Series B in December 2024, and is building two new DAC facilities in Louisiana with combined annual capacity of nearly 320,000 tons.
Zack Bloom is a co-founder of Heirloom Carbon Technologies, the company behind America's first commercial direct air capture facility in Tracy, California. A software engineer turned climate entrepreneur, Bloom previously co-founded Eager - a cloud app marketplace acquired by Cloudflare in 2016 - and served as Director of Product at Cloudflare overseeing Workers, Storage, and Tunnel. In 2020, he pivoted from internet infrastructure to atmospheric infrastructure, co-founding Heirloom alongside Shashank Samala and Noah McQueen. The company has since raised over $354M in total funding, opened its first facility, and secured contracts with Microsoft, Stripe, Shopify, Meta, and JPMorgan.
Verdigris is a Mountain View-based AI and IoT company that turns raw electrical data into actionable intelligence for data centers, commercial buildings, and industrial facilities. By clamping high-frequency sensors onto electrical circuits and running proprietary AI algorithms on the resulting waveform data, Verdigris gives facility operators real-time visibility into energy consumption, power quality, and equipment health - detecting failures before they happen, recovering stranded capacity, and driving 20-50% reductions in energy spend. Founded in 2011, the company serves Fortune 500 customers including T-Mobile, Verizon, and NVIDIA across 17 countries.
Jane Ren is the Co-Founder and CEO of Atomiton, a Santa Clara-based industrial IoT and sustainability software company she co-founded in 2013. With a rare combination of a medical degree from Peking Union Medical College and an MBA from UC Berkeley Haas, she bridges the gap between operational technology and enterprise sustainability. At Atomiton, she leads a 33-person team building AI-powered platforms that help data centers, manufacturers, and buildings reduce energy costs, optimize water use, and hit their carbon targets - work that earned the company the 'Most Innovative Platform in Energy and Sustainability 2025' award from Energy Business Review Magazine.
Kathleen Alexander is co-founder and CEO of Savor, a San Jose-based food-tech startup that makes butter, palm oil, and cocoa butter alternatives from carbon dioxide, hydrogen, and oxygen - no animals, no plants, no farmland. Backed by Bill Gates' Breakthrough Energy Ventures and Synthesis Capital with $33 million raised, Savor commercially launched its carbon-synthesized butter in March 2025 and was recognized in TIME's Best Inventions of 2025. Alexander holds a PhD in Materials Science & Engineering from MIT and is a 2013 Hertz Fellow who grew up in Corvallis, Oregon - famously starting college at 16, dropping out, attending community college, and ultimately earning her doctorate at MIT.
Mark Chung is the co-founder and CEO of Verdigris Technologies, a Mountain View-based AI company that provides circuit-level electrical intelligence for mission-critical data centers and commercial buildings. A Stanford-trained electrical engineer who spent 15 years designing chips at AMD, PA Semi (Apple), and NetLogic (Broadcom), Chung founded Verdigris in 2011 after a $560 electricity bill sparked an obsession with making buildings as transparent as spreadsheets. Today, Verdigris monitors 2+ gigawatts of peak demand across 20 million square feet of facilities for clients like T-Mobile, Verizon, NVIDIA, and Google, using 8kHz waveform sensors that detect equipment failures up to 21 days before they cause outages.
John Mern is the Co-Founder and CEO of Terra AI, a Khosla Ventures-backed startup using generative AI and probabilistic modeling to transform how humans find and develop critical minerals and energy resources underground. A Stanford PhD in aerospace engineering and alumnus of Boeing Phantom Works and KoBold Metals, Mern built Terra AI's platform to cut mine development timelines in half - running geophysical simulations 125,000x faster than traditional methods, achieving 40% reductions in drilling costs, and helping partners unlock over $100 million in investments. His work sits at the intersection of deep reinforcement learning, geoscience, and the urgent global race to secure the copper, lithium, and cobalt the energy transition demands.