TF
Temple Fennell
Co-Founder and Managing Partner at Clean Energy Ventures
· Cambridge, MA, USA
Check size
Undisclosed
Lead stage
early-stage
Deals tracked
25
Sectors
Climate Tech, Renewable Energy
Climate Tech
Renewable Energy
Sustainable Agriculture
Critical Mineral Refining
Battery Technology
Green Hydrogen
early-stage
seed
Series A
pre-seed
global
North America
About Temple
Temple Fennell is a Director with investment and operational experience in early-stage ventures. Limited public data available on specific firm affiliation, stage focus, or sector specialization
Investment thesis
Early-stage climate tech investor backing disruptive decarbonization technologies.
Temple Fennell deploys capital through Clean Energy Ventures into early-stage climate technologies, renewable energy, and sustainable agriculture. He focuses on breakthrough energy technologies and mission-driven innovators addressing climate change, with investments spanning critical mineral refining, grid modernization, sustainable aviation fuel, green hydrogen, battery technology, and industrial decarbonization. His approach emphasizes early-stage venture capital with a 25+ year track record of directing investments into 40+ climate tech startups since 2005, while advancing impact investing strategies for family offices
Investment philosophy
Temple Fennell focuses on early-stage climate technologies and business models that can materially reduce greenhouse-gas emissions at scale. Clean Energy Ventures targets breakthrough energy technologies and requires potential portfolio companies to be capable of mitigating 2.5 gigatons of carbon emissions cumulatively between initial investment and 2050.
Recent activity
Live platform data · proprietary, citable layer
Notable portfolio
Nth Cycle
LineVision
ConnectDER
Noon Energy
OXCCU
Evari
Rebound Technologies
Aqua Membranes
Travertine
Nitrofix
Electrified Thermal
Carbon Upcycling
Advanced Ionics
Boston Materials
SunDensity
Frequently asked
Does Temple Fennell invest at early-stage stage?
Yes. They invest at early-stage, seed, Series A stage.
Their geographic focus includes global, North America.
What is their typical check size?
Check size is not publicly disclosed. They currently invest through Clean Energy Ventures.
What sectors does Temple Fennell focus on?
Temple Fennell primarily invests in Climate Tech, Renewable Energy, Sustainable Agriculture, Critical Mineral Refining.
Similar Climate Tech investors
VK
Vinod Khosla
Climate Tech · Undisclosed
GD
Gina Domanig
Industrial Sustainability · Undisclosed
VL
Vikram Limaye
Climate Tech · Undisclosed
GS
Gayatri Sarkar
Deep Tech · $10 million to $50 million
Sign up for free to unlock similar investors
Are you a fit for Temple Fennell?
See your match score free · under a minute