from ARVERNE GROUP S.A. (isin : FR001400JWR8)
Inside Information / Other news releases
PRESS RELEASE
RGREEN INVEST partners with Arverne Founder and CEO Pierre Brossollet through GEOGREEN to advance geothermal energy and strengthen Europe's energy security
Paris / Pau, 2 July 2026 – RGREEN INVEST has completed a €52.4 million investment through its INFRAGREEN V fund in GEOGREEN, the holding company of Pierre Brossollet, Founder and Chief Executive Officer of Arverne, France's leading geothermal solutions provider.
RGREEN INVEST: a leading investment partner accelerating the energy transition and strengthening Europe's energy security
This investment reflects RGREEN INVEST's commitment to backing entrepreneurs developing the strategic infrastructure needed to accelerate Europe's energy transition, strengthen energy security and support industrial competitiveness.
Convinced that geothermal energy will play a central role in delivering secure, low-carbon energy, RGREEN INVEST continues to diversify its investment portfolio across strategic infrastructure assets that combine long-term resilience with attractive economic fundamentals. The transaction further demonstrates the firm's commitment to providing long‑term capital to entrepreneurial businesses delivering measurable environmental impact.
Arverne: France's leading geothermal solutions provider
Through its fully integrated business model spanning the entire geothermal value chain, Arverne is uniquely positioned to meet growing demand for locally produced renewable heat.
The Group is scaling up the deployment of competitive, low-carbon geothermal solutions for local authorities and industrial customers, while unlocking strategic resources such as geothermal lithium, a critical raw material supporting Europe's energy transition and battery value chain.
A strategic partnership to support Arverne's Dual Flow growth plan
RGREEN INVEST's investment follows the fulfilment of all conditions precedent relating to the agreement announced on 16 June 2026.
The transaction will enable GEOGREEN to become the cornerstone investor in Arverne's planned ORANE bond issuance, committing €37 million as part of a €701 million fundraising alongside Bpifrance, Eiffel Essentiel, ADEME Investissement and Crédit Mutuel Equity.
The investment represents an important milestone in financing Arverne's Dual Flow strategic plan. It also reflects RGREEN INVEST's long-term investment approach, partnering with visionary entrepreneurs developing strategic infrastructure assets that will play a key role in Europe's low-carbon economy.
PRESS RELEASE
Following the completion of the transaction, GEOGREEN was appointed to Arverne's Board of Directors, where it is represented by Alexis Broders, Managing Partner at RGREEN INVEST.
Nicolas Rochon, Founder and Chief Executive Officer of RGREEN INVEST, said:
"Through this investment, we are supporting the development of a more competitive, resilient and low-carbon French energy mix. We are delighted to partner with Arverne, a national champion that has demonstrated its ability to unlock the exceptional potential of France's geothermal resources to deliver strategic infrastructure that strengthens both French and European energy security."
Pierre Brossollet, Founder and Chief Executive Officer of Arverne, added:
"I am particularly proud of the confidence shown by RGREEN INVEST, whose recognised sector expertise is underpinned by a strong entrepreneurial culture. This partnership reinforces my long‑term commitment as a shareholder while providing Arverne with additional financial resources to deliver sustainable value creation and execute our growth ambitions.
By 2031–2033, Arverne aims to produce around 4 TWh of deep geothermal energy annually in France, representing more than half of the targets set out in the national energy roadmap and avoiding close to one million tons of CO₂ compared with natural gas. Annual production of 27,000 tons of lithium carbonate in Alsace will provide enough material to supply batteries for around 800,000 electric vehicles. Our business model, built on EBITDA margins exceeding 50% and long‑term contractual revenues, is designed to generate secure, predictable cash flows."
GEOGREEN Shareholding Structure
Following Arosco's contribution in kind of Arverne shares and INFRAGREEN V's cash investment, GEOGREEN's share capital is held 51.36% by Arosco, Pierre Brossollet's family holding company, and 48.64% by INFRAGREEN V.
Impact on Arverne Group's Shareholding and Governance
Following Arosco's transfer of Arverne shares to GEOGREEN and the completion of GEOGREEN's off-market acquisitions of share blocks2 from existing minority shareholders, Arverne's shareholding structure will be as follows:
| Shareholders | Ordinary shares | Founder's shares | Total shares | % share capital | Shares with voting rights | % voting rights | Non exercisable shares | % total exercisable voting rights |
|---|---|---|---|---|---|---|---|---|
| Arosco via Geogreen | 10 839 147 | 10 839 147 | 21 678 294 | 37.25% | 21 678 294 | 39.59% | 0 | 0% |
| Former partners of Arverne Group SAS | 3 671 272 | 0 | 3 671 272 | 6.31% | 3 671 272 | 6.70% | 0 | 0% |
| Concert Cressendoem SAS and Cressendoem | 1 889 432 | 1 455 950 | 3 345 382 | 5.75% | 3 345 382 | 6.12% | 0 | 0% |
| Shalestone Invest | 1 412 000 | 1 412 000 | 2 824 000 | 4.86% | 2 824 000 | 5.16% | 0 | 0% |
| Full Essentiel SLP | 2 466 662 | 1 827 497 | 4 294 159 | 7.39% | 4 294 159 | 7.84% | 0 | 0% |
| Former owners of SPAC Transition | 3 981 600 | 0 | 3 981 600 | 6.86% | 3 981 600 | 7.27% | 0 | 0% |
| ADEME Investissement SAS | 4 589 466 | 0 | 4 589 466 | 7.91% | 4 589 466 | 8.38% | 0 | 0% |
| Amundi S.A. | 2 400 000 | 0 | 2 400 000 | 4.13% | 2 400 000 | 4.38% | 0 | 0% |
| Hydro Energy Invest AS | 3 187 500 | 0 | 3 187 500 | 5.49% | 3 187 500 | 5.82% | 0 | 0% |
| Arverne managers | 429 474 | 0 | 429 474 | 0.74% | 429 474 | 0.78% | 0 | 0% |
| Crédit Mutuel Equity | 2 474 825 | 0 | 2 474 825 | 4.27% | 2 474 825 | 4.52% | 0 | 0% |
| Free float | 9 773 323 | 9 773 323 | 19 546 646 | 33.54% | 10 111 946 | 18.45% | 9 434 700 | 17.21% |
| Total | 57 323 029 | 25 290 417 | 82 613 446 | 100.00% | 54 589 150 | 100.00% | 9 434 700 | 17.21% |
PRESS RELEASE
Arosco and INFRAGREEN V, which are acting in concert in relation to Arverne, intend to maintain GEOGREEN's shareholding in Arverne below the threshold of 30% of the shares and/or voting rights.
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About RGREEN INVEST
RGREEN INVEST is a Paris-based investment management company, with over 15 years of experience financing the energy transition. B Corp-certified, and a mission-driven company, RGREEN INVEST brings European entrepreneurs in the industry a comprehensive tailored range of financial solutions, in both equity and debt, to support their growth.
RGREEN INVEST's purpose is to accelerate the energy transition, strengthen energy sovereignty and independence, and mitigate climate change while fostering adaptation. With 50 specialised and experienced professionals, RGREEN INVEST has already supported over 5,000 projects mainly in Europe amounting to more than €3.6 billion managed since inception.
To find out more, visit http://www.rgreeninvest.com/en or follow us on LinkedIn RGREEN INVEST
PRESS CONTACTS:
RGREEN INVEST
communication@rgreeninvest.com +33 1 85 65 90 00
Hadvisors
About Arverne
Arverne is France’s leading provider of geothermal solutions. Leveraging its expertise, Arverne harnesses natural underground resources to develop local heating, cooling, and lithium solutions. A mission‑driven company listed on Euronext Paris, Arverne promotes short‑supply‑chain energy sovereignty for communities and industry.
PRESS CONTACTS:
Press relations: Enora Budet enora.budet@seitosei-actifin.com +33 (0)6 72 17 84 60
Investor relations : Mathilde Guillemot investor.relations@arverne.earth +33 (0)6 64 18 35 55
Notes
- million fundraising.
- It is noted that these acquisitions were completed at a price of €4.00 per Arverne share. Please refer to Arverne's press release dated 19 June 2026.