Phone Number: +32 477 422 465


Managing Partner

Guy offers a background in investment banking, corporate law, and business advising to potential partners. Previously associated with four investment banking firms — Dumesnil-Leblé Bank, M&A International, Privafin and Icafin — Guy initiated and closed numerous transactions for middle-market businesses. He has also acted as an advisor to boards of directors, addressing shareholder and corporate finance issues. Prior to beginning his career in investment banking, Guy was a banker with Nomura Securities and an auditor at PWC.

His experience encompasses public offerings of debt and equity securities, mergers, acquisitions, recapitalization, joint ventures, private placements, fairness opinions and valuations. Guy has worked in a number of diverse industries including chemicals, food, aviation, fashion, construction, and IT and services.


Executive MBA, Solvay Business School Brussels, Belgium

Corporate Finance Program, London Business School, England

Masters in Business Administration - Louvain School of Management, Belgium


Managing Partner Belgium, ONEtoONE Corporate Finance

Managing Partner, Icafin

Managing Partner, MandA International

Managing Director, Privafin

General Manager, Aufisco

Managing Director, Loretto Group

General Manager, Dumenil Leble Management

Sales Manager, Nomura Securities

Senior Auditor, Coopers and Lybrand Consulting

Track Record

Some of his career transactions to highlight are:

Sale of Silidur to Rynol (construction)
Sale of Olivier Strelli to Ever Capital (Fashion)
IPO of Fidelity Net Marketing (direct marketing)
Capital increase of Intercultures on Luxembourg stock market with a EUR 50m transaction to Bollore Group
MBO of Sepulchre (specialty chemicals)
Fundraising of Xylowatt and Greenwatt (green energy)
Fundraising Selinko (IoT)
Sale of Bureau van Dijk ERP division to SOA People (ERP software)

International Experience

Belgium (BE)
United Kingdom (GB)
Japan (JP)

Sector Expertise

Information technology
Brussels-Kraainem office


Mechelsesteenweg 455
B-1950, Brussels-Kraainem


IT, Construction, Food, Media

Advised Deal

Sell side mandate

ONEtoONE has acted as the exclusive financial advisor to our client, van Hoorebeke Timber, in the sale of their company to van Steenberge. Van Hoorebeke Timber is one of the most important Belgian players in the sector of import and distribution of wood. Etienne Van de Kerckhove, former chairman of van Hoorebeke Timber: "We are confident that both companies will create even more value for the respective customers and business partners, as well as many growth opportunities for both teams. Timber products are an important sustainable building material for the future and the European timber market needs global players with strong expertise and purchasing channels." Van Steenberge is a leading specialist in timely delivery of softwood, panel material and numerous finished wood products for the contracting industry and general industry. They combine their decade-long experience and knowhow with an innovative mindset, allowing them to anticipate the ever-evolving needs of their customers with a solution-oriented approach. They do this together with their team of wood specialists who follow the newest trends and techniques regarding soft wood and panels closely. With the combined skills of both companies, comes the creation new synergies in the international timber market, and by combining the know-how of both companies, there will be an expansion in their respective markets.

Private Placement

We are happy to announce that ONEtoONE Corporate Finance successfully raised an undisclosed amount of equity in the millions of Euros for H2WIN SA from smart business angels. H2WIN is a Belgian private biotechnology R&D company, recognised in the industry and by academia as being the only company in the world working to produce hydrogen from the direct conversion of sunlight and water with (photo)enzymatic catalysts, the H2GREEN system. The purpose of this equity raise is to develop the industrialisation of the enzyme production and the fixing of the enzymes in the Proton Exchange Membrane (PEM).

Sell side mandate

We are proud to announce that ONEtoONE Corporate Finance Benelux advised Auctelia shareholders in the sale of their company. Founded in Belgium in 2009, Auctelia is an online auction platform for used professional equipment and vehicles. Auctelia provides its clients with a base of qualified buyers in 40 countries, as well as an exhaustive range of services related to the management of digital transactions. ONEtoONE Corporate Finance Benelux identified Agorastore as being the best possible buyer for Auctelia. Agorastore is a player in the circular economy since 2005. Agorastore enables companies and public authorities to give a second life to their capital goods and real estate assets through an online auction platform and additional services. With Auctelia, the Group will reach a business volume of nearly €150 million.

Private Placement

ONEtoONE is pleased to announce that they have helped the Liège-based company CryoTherapeutics SA in securing its most recent funding of €12.3 million. The Swiss investment fund Yellowstone will now take a stake in the MedTech company. The focus of the company is the development, demonstration of clinical benefit, and early-stage commercialization of cryotherapy systems for the treatment of coronary plaque. The company´s technology is comprised of an intravascular catheter that can deliver at its tip sub-zero temperatures to treat inflamed areas of the coronary artery with the aim of stabilising lesions that could otherwise rupture and cause a heart attack. Yellowstone Holding AG (Yellowstone) is a Swiss investment company with a strong and extensive network in Asia, focusing on European med-tech start-ups with breakthrough innovation. Yellowstone is positioned as a strategic investor, aiming to bridge and integrate portfolio companies with supply chains and resources among the EU, Switzerland and Asia.

Private Placement

ONEtoONE is pleased to announce that MAZARO has become the first crowd listing on Euronext Brussels and is now successfully listed on Euronext Access. This transaction combines a successful crowdfunding campaign and a private placement followed by a listing on the exchange. MAZARO designs innovative transmissions that combine an exceptionally high internal efficiency with the ability to keep the engine or E-motor on its optimum efficiency curve at all times, offering unrivalled energy, emissions and cost savings while enhancing performance and comfort.

Buy side mandate

Efficy, the Belgian leader in European CRM (Customer Relationship Management) provider, has announced the acquisition of the Swedish company Apsis. This transaction acts as a gateway for Efficy to expand its product scope to data-driven marketing solutions and allows for its penetration of the Nordics markets. Which in turn, represents a major milestone towards Efficy´s ambition to reach a 5% market share of the European CRM market by 2024.

Buy side mandate

The Belgian group, Efficy, has just acquired the Spanish software CRM developer SumaCRM, in an operation advised by ONEtoONE Corporate Finance on the side of the buyer. The acquisition fits into the growth strategy of the Belgian group, which already has more than 20M turnover and a portfolio of more than 2,400 customers in 33 countries.

Sell side mandate

The Benelux team of ONEtoONE Corporate Finance has successfully advised on a sell-side operation the owner of Ciné Télé Revue, Michel Leempoel, on the sale of Ciné Télé Revue. The company is the french-speaking Belgium’s preferred TV magazine. The objective of this deal is to help the magazine adapt to changing media consumption habits. As a new part of Rossel, Ciné Télé Revue will become the corner stone of the latter’s, movie, people and lifestyle content offer.

Private Placement

With ONEtoONE Corporate Finance support, ACTIV'INSIDE, a French company specialized in the development and sales of Active Neutraceutical Ingredients has welcomed AQUITI Gestion and Bpifrance as new shareholders in order to finance its organic and external growth. ONEtoONE Corporate Finance has advised ACTIV’INSIDE shareholders and managers for the last two years in the definition of their strategy, their business plan and their funding options. Being entrepreneurs ourselves, we are happy to support entrepreneurs in all steps of their financial strategy.

Buy side mandate

Distec International is a company specialised in value added distribution created in 1987 and are active in France, Belgium, Luxembourg and The Netherlands. Since he joined the company as Managing Director in 2012, one of Quentin Janssens main focus has been on bringing Distec to the age of e-commerce. ONEtoONE Corporate Finance Benelux served as advisor to Initiative & Finance, a French MBO fund, for the structuring and the financing of the MBO transaction.

Private Placement

Distec International is a company specialized in value added distribution, created in 1987 and active in France, Belgium, Luxembourg and The Netherlands. Since joining the company as Managing Director in 2012, Quentin Jassens’ main focus has been on bringing Distec to the age of e-commerce. ONEtoONE Corporate Finance Benelux actedas advisor to Initiative & Finance, a French MBO fund, for the structuring and the financing of the MBO transaction.

Sell side mandate

ONEtoONE Corporate Finance advised in the sale of the shares of Erasme Hotel SA. This company is running a 81 rooms hotel and a residence of 9 apartments. The hotel is located next to the biggest university hospital in Brussels, called Hôpital Erasme. The buyer is a Belgian hospitality Group that has already 10 hotels and is the biggest Accor franchisee in Belgium.


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