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M&A for Sustainability Companies




Rizoma is the boutique sell-side advisor for climate companies. We provide specialized M&A advisory and capital raise services for sustainability-focused companies, helping our clients capture the strategic value of decarbonization in their exits. Our mission is to help scale the technologies and business models that will help humanity thrive by delivering financial results for the people who build and invest in them.

Combining companies can unleash beneficial technologies at scale. At Rizoma, we fulfill the transformative potential of M&A by combining new ideas with a proven process. Our services include reverse due diligence so our clients can understand how buyers match up with their impact criteria.


Impact advisory


Rizoma partners with investors seeking to assess and integrate sustainability and impact factors into investments, from investment thesis through diligence to exit. We conduct baseline assessments of your portfolio, design and establish processes to identify and collect the right data, and help investors make informed decisions on what to do next. 

We also work with companies to conduct materiality assessments and establish tailored strategies, and partner with operators to ensure they are equipped and energized to lead on sustainability. 


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Claire Veuthey

Principal & Founder

Claire has worked in sustainability and impact roles at startups, scale-ups, and Fortune100 firms for close to 20 years. She has experience in product, research, investment, and sales. Claire is responsible for sourcing and executing M&A transactions on behalf of Rizoma's clients, and takes pride in getting entrepreneurs access to a sustainability premium.

Claire earned an MBA from the Haas School of Business (UC Berkeley) and the Fundamentals of Sustainability Accounting (FSA) Credential. She is also a fellow and Course creator, and serves as a strategic advisor for several startups. She speaks French and Spanish fluently, and has lived in 7 cities in 6 countries on 3 continents. Claire is also a Founding Contributor at the Startups and Society Initiative, and the co-author of The Grassroots DEI Organizer Playbook. Claire serves on the board of Turning Green, an environmental advocacy and education nonprofit, and sits on the San Francisco Public Utilities Commission’s Revenue Bond Oversight Committee.

Impact Advisory Testimonials

We worked with Claire on a 6 week project covering 4 separate business line initiatives. She helped us think strategically and incorporate best practices with regards to investment process, marketing strategy, partnership strategy and community engagement strategy. Her broad experience allowed her to bring fresh ideas to the conversation with our team. Throughout the entire engagement Claire communicated efficiently and effectively ensuring that everyone was on the same page the whole time. We absolutely plan to engage Claire on future strategy projects.

We hired Claire to help us solve one of the most complex problems facing our industry: impact measurement and reporting. Claire drew upon her familiarity with relevant data sources, fluency with the latest industry conventions, and investment experience across asset classes, plus an open-minded but systematic approach to problem solving. Together we created a unique and intellectually honest approach that works well for us and our clients. We would work with Claire again in a heartbeat!

Jordan Park

Claire is a wonderful collaborator.  She is proactive, timely, execution-oriented, and thoughtful.  She produces high-quality, insightful work with generosity and a warm-spirit.   I'd happily take the chance to work with her again.

Lyel Resner, Startups and Society Initiative

Impact Advisory Clients

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Contact Us

Interested in working together?
Please get in touch.

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