About Us
Three Cairns Group is a philanthropic investment firm focused on turning climate ambition into lasting impact.
Meet Our Team 
What we do
We bring together the right people, partnerships, and resources to help promising efforts take root and scale.
Three Cairns Group works across four areas: Giving & Impact, Strategic Initiatives, Investments, and Emerging Opportunities. We bring deep listening, rigorous analysis, and long-term relationship-building to every challenge, staying close to execution and working alongside partners. We measure success by whether ideas become actionable, efforts become scalable, institutions become stronger, and people’s lives improve.
Our Mission
We identify opportunities to accelerate climate progress and strengthen the conditions for lasting impact at scale.
Our Vision
Climate action expands opportunity, strengthens communities, and ensures a sustainable future for everyone.
Our Values
Decarbonizing the planet and creating sustainable economies requires urgent, thoughtful and collaborative action.
We bring analytical rigor and deep relationships to every challenge because durable progress depends on both.
We listen first and work alongside partners, communities, and leaders to understand what people and systems need to succeed.
We invest our time, expertise, networks, and capital where they can unlock opportunity and accelerate change.
Real Impact
We mobilize catalytic capital, strengthen market infrastructure, expand climate talent, and build enduring organizations that accelerate climate progress.
$825M
climate investment platform
Co-founded and incubated Allied Climate Partners, helping launch an estimated $825 million climate investment platform that unlocks private capital for locally managed cleanenergy funds.
~22%
less tailpipe pollution
Partnered to advance New York City's congestion pricing program, reducing traffic, generating nearly $1 billion annually for public transit, and cutting tailpipe pollution by ~22% in its first six months.
235
climate tech companies launched
Supported Activate fellows who launched 235 climate technology companies, raised more than $4 billion in follow-on funding, and created more than 3,000 high-quality climate and clean energy jobs.
Our Work
Three Cairns Group works where opportunity, talent, resources, and momentum already exist, but the pathways needed to connect and scale them do not.
We strengthen partnerships, support leaders and organizations, deploy philanthropic capital, and help turn promising efforts into meaningful impact. Our work spans climate change, democracy, and select other issues where stronger institutions, collaboration, and leadership can accelerate progress.
