Callisto

What Callisto does

Callisto is a Paris-headquartered financial advisory firm founded in 2005 by Hervé Couffin and Eric Delorme, both former senior partners at PAI Partners. The firm exclusively advises management teams in leveraged buy-out (LBO) transactions, providing services that span the full lifecycle of a buy-out: preparation, structuring, negotiation of management investment packages, transaction execution, in-life support for add-on acquisitions and refinancings, and exit preparation. Its core offerings include LBO Advisory Services, Management Package Structuring, Transaction Benchmarking, Exit Preparation Advisory, and LBO Restructuring Advisory. The firm explicitly prohibits itself from accepting mandates from investment funds or investment banks, creating structural conflict-of-interest independence that serves as its central market positioning.

The firm's competitive foundation rests on the experience of its four partners, who collectively bring over 70 years of private equity and investment banking experience from institutions including PAI Partners, Paribas, Citigroup, Bank of America Merrill Lynch, UBS, Crédit Agricole, Barclays Capital, Quilvest, and Perceva. Callisto supplements this human expertise with proprietary in-house LBO and management package modeling tools and a unique benchmarking database built across more than 120 transactions. The team operates with 8 professionals based at 19 avenue de messine in Paris's 8th arrondissement, covering mid-cap and large-cap transactions in France and across Europe.

Callisto generates revenue through advisory fees on professional services engagements, with each mandate tied to a specific LBO transaction. The client base is exclusively enterprise-class management teams, with disclosed reference deals spanning valuation sizes from approximately €400M (Belambra, Gutor) to €5B (Sebia). GTM is relationship-led, driven by referrals through the European private equity ecosystem including PE funds, investment banks, financing banks, and law firms. The firm is privately held as a French SAS, fully owned by its partners, with no external funding, subsidiaries, or public listing.

Name

Callisto

Legal name

Callisto

Website

https://callisto-finance.com

Company type

Private

Founded year

2005

Operating status

Operating

Headcount range

1–10 employees

Short description

Callisto is a Paris-based financial advisory firm founded in 2005 that exclusively represents management teams in leveraged buy-out transactions, providing conflict-free advisory across structuring, negotiation, and execution of mid-cap and large-cap LBOs across Europe.

Ownership category

akta.pro rank

Product category

Financial Advisory Services

NAICS

Management Consulting Services (54161), Portfolio Management and Investment Advice (52394)

SIC

Services-Management Consulting Services (8742), Investment Advice (6282)

akta.pro primary industry

Management Buyouts (MBO/MBI) & Sponsor-Led Transactions Advisory (FSAEAGAI)

akta.pro secondary industry

Management Buyout / Management Buy-In (MBO/MBI) (FSANABAL)

Keywords

• LBO advisory services
• Management buyout advisory
• Financial advisory services
• Management package structuring
• LBO transaction benchmarking

Headquarters

HQ city

Paris

HQ country

France

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales

Revenue model

1. Financial Advisory Services: Callisto generates revenue through advisory fees for LBO consulting services, assisting management teams in preparation, structuring, and negotiation of buy-out transactions. Services include management package negotiation, shareholder agreement structuring, and transaction execution support.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels1 record

Core offering

Callisto is a Paris-based independent financial advisory firm that advises management teams on Leveraged Buy-Out (LBO) transactions. The firm provides transaction advisory, management package structuring and negotiation, transaction benchmarking, exit preparation, and LBO restructuring support, acting exclusively on behalf of management teams rather than selling shareholders or financial sponsors.

Product overview

Callisto is a financial advisory firm offering a unified suite of advisory services for management teams in LBO (Leveraged Buy-Out) transactions. The core offering comprises LBO Advisory Services, Management Package Structuring, Transaction Benchmarking, Exit Preparation Advisory, and LBO Restructuring Advisory. These services work together to guide management teams through the complete lifecycle of a buy-out—from initial preparation and transaction negotiation through to restructuring events and eventual exit.

Differentiator

Problem solved

Functional benefit

Products and services

• LBO Transaction Advisory End-to-end advisory to management teams participating in leveraged buy-out transactions, including deal structuring, transaction strategy, and support through closing. Targeted at CEOs, CFOs, and other C-suite executives of mid-market companies undergoing LBOs.
• Management Package Structuring and Negotiation Advisory on the structuring, benchmarking, and negotiation of management equity packages within LBO transactions, including equity rollover, sweet equity, carried interest, and associated vesting and liquidity terms. Serves management teams negotiating their economic participation in LBOs.
• LBO Transaction Benchmarking Benchmarking of LBO deal terms, financing structures, and management package economics against a proprietary database of historical LBO transactions, providing management teams with comparable precedents for negotiation and structuring.
• Exit Preparation Advisory Advisory to management teams preparing to exit LBO transactions, including preparation of divestment processes, negotiation of exit terms, and alignment of management interests through exit. Targeted at management teams approaching the end of an LBO holding period.
• LBO Restructuring Advisory Advisory to management teams on restructuring of existing LBO transactions, including refinancing, covenant renegotiation, balance sheet repair, and amendment of management package terms. For management teams with existing LBO debt facing financial pressure or seeking to optimize capital structure.

Named customers9 records

Segments1 record

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Scale indicators4 records

Recent moves5 records

Expansion highlights4 records

Direct peers

• Cambon Partners: French independent M&A advisory boutique advising mid-market companies and their shareholders, including on PE-sponsor transactions. Operates a similarly specialized, partner-led model in France and overlaps with Callisto on French mid-cap LBO mandates.
• Messier Maris & Associés: Paris-based independent advisory firm founded by former Lazard partners, focused on M&A, restructuring, and special situations. Comparable independent-boutique positioning serving French corporates and PE-backed businesses on mid- and large-cap transactions.
• Eight Advisory: Independent European financial advisory firm specialized in transactions, restructuring, and distressed situations. Founded by former Lazard partners, it competes with Callisto for French and European mid/large-cap advisory mandates from management teams and shareholders.
• DC Advisory: Global M&A and corporate finance advisory boutique (formerly Close Brothers). Active across European mid- and large-cap LBO advisory, often representing management teams and shareholders, making it a structural competitor to Callisto.
• Lincoln International: Global mid-market M&A advisory firm with strong European presence advising on buy-side, sell-side, and management advisory mandates. Directly comparable to Callisto on European mid- and large-cap LBO advisory for management teams and sponsors.
• DDA & Company: European M&A and corporate finance advisory boutique advising mid-market companies and management teams. Comparable boutique positioning to Callisto across European mid-cap LBO and shareholder advisory mandates.

Broad incumbents

• PJT Partners: Global advisory-focused investment bank with significant European LBO and shareholder-advisory franchise. Larger and broader than Callisto but competes for management-side advisory mandates on large-cap European buy-outs.
• Lazard: Global financial advisory and asset management firm with deep European M&A franchise. Operates a much broader advisory platform than Callisto but competes on large-cap LBO advisory mandates and sets benchmark fees and structures for the segment.
• Rothschild & Co: Global independent financial advisory group with a leading European mid- and large-cap M&A practice. A broad incumbent competing with Callisto on management-side advisory in European LBOs while offering broader financing and strategic services.

Emerging players

• Clipperton: Paris-based independent M&A advisory boutique focused on European technology and digital companies. Overlaps with Callisto on French mid-cap LBO and growth transactions but is sector-specialized in tech rather than generalist.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights5 records

Customer concentration

• LinkedInlinkedin.com/company/callisto-sas/?originalSubdomain=fr

Revenue estimate

Valuation estimate

Number of profiles

Profiles8 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Callisto