France's leading carbon operator

France's reference for verified-impact carbon contribution

Stock CO₂ supports companies in their carbon contribution strategy through the Label Bas-Carbone, France's only government-backed label guaranteeing real, measurable impact.

+250

contributors supported

1ère

carbon trust in France

1ère

forest carbon insurance

1er

multi-sector operator in France

Our networks, coalitions & certifications

Member of 19 networks, labels and climate initiatives

A committed player

A committed player in the ecosystem

Stock CO₂ is a Label Bas-Carbone operator, B Corp certified, and engaged in France's leading climate and biodiversity coalitions.

B Corp certified since 2022

Stock CO₂ is a B Corp certified company by B Lab, a global network recognizing businesses meeting the highest standards of social and environmental performance, transparency and accountability. This certification is reassessed every three years and covers governance, workers, community, environment and customers.

AFEF

French Association of Waters and Forests

Aubin Labergère, co-founder of Stock CO₂, has been Secretary General of AFEF since 2023. This historic association brings together stakeholders in forest management and water resource preservation in France.

Secretary General — Aubin Labergèreleseauxetforets.fr →

Nature+ Coalition

Coalition co-founded in 2025

Guillaume Panthou, co-founder of Stock CO₂, is Vice-President of the Nature+ Coalition, co-founded in 2025 with Reforest'Action, aDryada and SE Advisory Services (ex-Ecoact). This coalition aims to accelerate funding for nature-positive projects in France and Europe.

Co-founder & VP — Guillaume Panthounaturepluscoalition.org →

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Label Bas-Carbone

Stock CO₂ is an operator of the Label Bas-Carbone, France's only official certification framework — backed by the Ministry of Ecological Transition — guaranteeing real, measurable and additional emission reductions.

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M.E.R.C.I — 5 dimensions of impact

Our proprietary method evaluates projects across 5 pillars: Carbon, Ecosystems, Natural Resources, Citizenship, Inclusion.

The founding team

Three entrepreneurs committed to climate action

Since 2019, the three co-founders of Stock CO₂ have combined financial expertise, field knowledge and community engagement to structure the French carbon market.

Guillaume Panthou

Co-founder & CEO

Vice-President of Nature+ Coalition

Guillaume has been leading Stock CO₂ since its creation in 2019. He co-founded the Nature+ Coalition in 2025 alongside Reforest'Action, aDryada and SE Advisory Services, and serves as Vice-President. He drives the strategic vision and key account development.

Aubin Labergère

Co-founder & COO

Secretary General of AFEF

Aubin has been Secretary General of AFEF (French Association of Waters and Forests) since 2023. A specialist in forest and agricultural ecosystems, he oversees field operations and relationships with Label Bas-Carbone project holders.

Thomas Martal

Co-founder & CFO

A Sciences Po Paris graduate, Thomas oversees Stock CO₂'s financial strategy and structures carbon project financing mechanisms — environmental trust with Caisse des Dépôts, forest insurance, carbon credits.

Concrete impact

The concrete impact of our project ecosystem

326

Label Bas-Carbone certified projects

607,037 tCO₂

sequestered over 30 years

28,808 ha

in ecological transition

2,307,907

trees planted

133

tree species planted

agricultural levers activated

regions covered

+250

companies supported

Our commitments

Our commitments that protect you

Stock CO₂ commits to its contributors through concrete commitments: transparency, scientific rigor, certification and social impact.

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Total transparency

Every data point, metric, and euro is tracked and verifiable. CSRD-compatible reporting included.

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Verified impact

Our projects are certified Label Bas-Carbone by the Ministry of Ecological Transition. Every tonne is measured, verified and traced.

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Direct relationship

As an operator, we ensure the direct relationship between your company and project holders. No subcontracting, no opacity.

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Scientific rigor

Our evaluation methods are validated by the Ministry and rely on IPCC, INRAE and INPN standards.

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Local and territorial impact

We prioritize territorially-rooted projects to create local jobs and economic development.

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B Corp & community engagement

B Corp certified since 2022, co-founder of the Nature+ Coalition, Secretary General of AFEF — our commitment goes beyond the company.

Our journey

Since 2019, Stock CO₂ has been structuring the French carbon market

Stock CO₂ founded

Launched as a Label Bas-Carbone operator with the first forestry projects.

2019

Agricultural diversification

Expansion into Carbon Agri and field crop projects. First corporate contributors.

2020

1st carbon trust & forest insurance

Establishment of the first environmental trust with Caisse des Dépôts and France's first forest climate insurance.

2021

B Corp certification & scaling up

B Corp certification obtained. Over 200 labeled projects milestone reached.

2022

5-dimension ecosystem scoring

Development of the 5-pillar scoring system (climate, biodiversity, water, soil, socio-economic) to evaluate the real impact of each project.

2023

Leading multi-sector operator

Deployment across 7 Label Bas-Carbone methods. 250+ contributors supported.

2024

Carbon'Diag transferred to Groupe Isagri

The agricultural carbon diagnostic software developed by Stock CO₂ is transferred to Isagri, specialist agricultural software publisher, to amplify impact for farmers.

2025

Ready to act?

326 certified projects. One platform.

Join the companies that trust Stock CO2 with their carbon contribution.