Independent M&A Advisory  ·  Est. 2024  ·  Paris

Sunstone Advisory

Vol. I  —  Advisory for high-stakes transactions

Founded 2024 · 20+ Transactions Closed · 100+ Opportunities Assessed · 15+ Years Combined Experience marine@sunstoneadvisory.fr

The Mandate

Advisory at the intersection of capital, ownership and leadership.

Sunstone Advisory works with companies, founders, family businesses and investors in situations where ownership, leadership and capital intersect — providing the structured, independent support that high-stakes transactions demand.

With the perspective of an investor.

M&A Advisory (Buy & Sell)

  • Process preparation and management
  • Due diligence oversight and review
  • Valuation, structuring and financing
  • Negotiation and documentation
  • Closing

Portfolio Work & Exit Support

  • Value creation execution
  • Add-on acquisitions
  • Investor and board interactions
  • Financing & refinancing
  • Equity story and BP refinement
  • Exit preparation and process

Fundraising Advisory

  • Process drive and execution
  • Equity story and materials
  • Q&A preparation and management
  • Investor follow-up and tracking
  • Term sheet and documentation

Track Record

20+ Transactions Closed Across M&A advisory and private equity — from large-cap flagship investments to mid-market acquisitions, disposals, add-ons, financings and fundraisings.
100+ Opportunities Assessed Deal flow evaluated across sectors, geographies and ownership structures, building a pattern recognition that no single-side advisory can replicate.
15+ Years of Experience Investment banking at Deutsche Bank and private equity at Carlyle's European Buyout fund — structuring, executing, owning and selling companies.
Coverage Based in Paris, France. Working globally. Reachable in French and English.

The Advisor

Marine Charbonnier

Founder & Managing Director

A decade in investment banking and private equity — first structuring and executing deals at Deutsche Bank, then assessing, negotiating, owning and selling them as an investor at Carlyle's European Buyout fund.

Over a hundred opportunities assessed and 20+ closed.

Sunstone Advisory is built on that experience, and the conviction that the best transaction support comes from understanding not only how processes work, but how investors really think.

Deutsche Bank Carlyle Dauphine

Our Approach — Stone

SUNSTONE

Rigorous.  Structured.  Reliable.

Our Approach — Sun

SUN

Clear.  Pragmatic.  Easy to work with.

"Most advisors have seen deals from one side of the table — as banker or investor. Sunstone Advisory brings both perspectives, combining years of deal execution with private equity experience in assessing, negotiating, owning and selling companies."

Founding Principle  —  Sunstone Advisory

Analysis

Experienced partner

20+ transactions closed across M&A advisory and private equity — from large-cap flagship investments to mid-market acquisitions, disposals, add-ons, financings and fundraisings. Not a firm building its track record on your transaction.

A critical sounding board

Beyond process and deliverables, we challenge analysis, pressure-test assumptions and sharpen investment cases — whether assessing an opportunity or preparing for investor scrutiny. This is where the PE perspective becomes structural.

Hands-on approach

Not just advising, but actively involved. We structure, negotiate, drive and decide together. Every mandate handled directly — no layers, no dilution. The partner you meet at the first call is the partner on your process through closing.

Independent and fully aligned

No conflicts of interest, no proprietary products to push, no cross-selling agendas — fully aligned with your objectives. Independence is not a marketing claim here; it is the structural reality of a single-principal advisory firm.

Contact

Let's talk.

Based in Paris, France. Working globally.
Reachable in French and English.

Get in Touch
marine@sunstoneadvisory.fr
linkedin.com/in/marinecharbonnier
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