Advisory for high-stakes transactions —
M&A, exits, fundraising and
ownership transitions.
With the perspective of an investor.
Critical transaction
support.
Sunstone Advisory works with companies, founders, family businesses and investors in situations where ownership, leadership and capital intersect.
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.
Across M&A advisory, private equity and investment banking
Buy & Sell
- Process preparation and management
- Due diligence oversight and review
- Valuation, structuring and financing
- Negotiation and documentation
- Closing
Exit Support
- Value creation execution
- Add-on acquisitions
- Investor and board interactions
- Financing & refinancing
- Equity story and BP refinement
- Exit preparation and process
Advisory
- Process drive and execution
- Equity story and materials
- Q&A preparation and management
- Investor follow-up and tracking
- Term sheet and documentation
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.
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.
Hands-on approach
Not just advising, but actively involved. We structure, negotiate, drive and decide together. Every mandate handled directly — no layers, no dilution.
Independent & aligned
No conflicts of interest, no proprietary products to push, no cross-selling agendas — fully aligned with your objectives.
Marine Charbonnier
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.
Rigorous in execution.
Pragmatic in approach.
Easy to work with.
Let's talk.
Based in Paris, France. Working globally.
Reachable in French and English.