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Support for deal teams

Working with investment teams and banks to sharpen equity stories - from due diligence to value creation - and adapt them to the realities of the New Climate Era.

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Tailor-made strategic support Tailor-made

Integrating sustainability, long-term vision, and investment decisions, with a systemic approach adapted to 21st-century environmental and social realities.

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Operational support for CSOs

Chief Sustainability Officers

Combining in-depth technical expertise with integrated support across the full “sustainable finance” scope, enabling effective strategy and implementation.

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Support for deal teams

Fund investment teams as well as investment banks

Tailor-made strategic support for CEOs,

Sustainability, long-term vision and investment

Operational support for CSOs

Across the "sustainable finance" scope

Collective intelligence for New Climate Era. 

Our Team & Partners

Weastem unites 20 professionals with diverse expertise in strategy, finance, and sustainability, working hand-in-hand with a European network of partners. This embedded model blends core capabilities with external insight, ensuring clients benefit from collective intelligence and cooperation at every stage of the New Climate Era. 

Team

Emmanuel Parmentier

Co-founder

Imène Maharzi

Co-founder

Charlotte Salmon

Partner

Meet our team

Partnerships

Recent Posts

Stay up to date with Weastem’s latest insights, press releases, and articles. From industry analysis to thought leadership on the New Climate Era, we share perspectives on how finance can accelerate transitions and shape resilient strategies.

All articles
News
🌍 At IPEM Paris 2025, Emmanuel Parmentier will have the pleasure of moderating a panel at the Climate Summit

Emmanuel Parmentier will have the pleasure of moderating a panel at the Climate Summit on a question that is reshaping capital allocation in ambiguous and hard to read directions:

News
✨ Come and meet Weastem at IPEM Paris 2025 ✨

This September, IPEM will once again bring together the private markets community to debate and shape together the future of value creation, capital allocation, and resilience.

News
Sustainability teams in PE firms are often over-committed and under-leveraged

Contrary to what some may believe, demands from regulators, LPs, and portfolio companies keep growing and sometimes take unexpected turns ("what is our total Portfolio risk exposure to US tariffs?").

News
Why “Finance x Strategies for the New Climate Era”?

Alongside the name Weastem, we needed a tagline to convey our vision in a few words. Each word matters — and reflects a conviction.

Press release
A new chapter starts today for Sustainability and Strategy: WEASTEM is live.

We’re thrilled to introduce Weastem — Finance × Strategies for the New Climate Era.
We are Strategy Advisors to support the Acceleration of Transitions in European Finance

Press release
Article in Décideurs Corporate Finance

Thank you Céline Toni, Alexis Valero and Décideurs Corporate Finance for your article!

Press release
Article in La Lettre du conseil

Thank you Benjamin Polle and La Lettre du conseil for your article!

Press release
Article in CFNEWS (Corporate Finance News)

Thank you CFNEWS (Corporate Finance News) Agathe Zilber Aurore Barlier for your article!