Forvis Mazars recognised as a top global transaction services firm

Over the past 12 months, Forvis Mazars has worked in a number of outstanding global deals, demonstrating its expertise in complex, high-value and cross-border transactions, and the strength of its advice on financial, tax, legal and social due diligence, valuations, sale and purchase support. This was achieved despite a downward trend in overall M&A transaction volumes across industries. Highlights include:

• Blackstone’s investment in SIA Partners (UK and France) – delivered sell-side finance, accounting advisory and tax assistance to SIA Partners on the minority investment of up to €250m in funds managed by Blackstone.
• AXA’s acquisition of Prima Assicurazioni (France and Italy) – provided buy-side financial due diligence, business plan review and M&A PMO support on the acquisition of a 51% stake (valued at €500m) of Prima Assicurazioni, a leading direct motor insurance operator.
• TotalEnergies’ acquisition of solar and battery storage projects (UK) – provided buy-side finance and tax due diligence on the acquisition of a pipeline of eight solar projects from Low Carbon with a capacity of 350 MW and two battery storage projects with a capacity of 85 MW.
• Veolia’s acquisition of Evatherm (Switzerland and Hungary) – conducted financial and legal due diligence on the acquisition of Evatherm to expand Veolia’s water technologies portfolio.
• Bain Capital, Columbia Threadneedle and QuinSpark’s acquisition of Pullman Paris Montparnasse (France) – provided buy-side due diligence on the acquisition of the hotel from Unibail-Rodamco-Westfield.

On receiving the recognition and ranking as a top transaction services firm, Pierre Tchertoff, Partner and Head of Transaction Services, said: “Although competitive and unpredictable, 2025 turned out to be a rewarding year for our clients as we supported them with hundreds of verified deals around the world. This recognition signifies the quality of service we are committed to delivering and the trust our clients have in us. Bringing sector expertise as well as technical and commercial insight, our team provides the clarity and confidence needed to carry out a wide range of transactions across tech, healthcare, energy, industrials, logistics, private equity and financial services – supporting clients, amid the most volatile of markets, with their growth plans to achieve sustained, long-term success.”

The Mergermarket transaction services league tables rank the top firms in the transaction services space based on the number of deals that include a change of economic ownership by registered or fully operational companies or their assets.

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About our transaction services

The transaction services team at Forvis Mazars supports clients with acquisitions, disposals and reorganisations across 50+ countries globally. They assess financial and tax risks, evaluate performance, challenge forecasts/assumptions and support contract negotiations, offering tailored, practical advice that helps clients secure stronger terms and navigate complex transactions. Learn more.

Press contact

Rosa Mejia Banks, Group PR and Content Officer  
Rosa.Mejia-Banks@mazars.co.uk / +44 (0) 20 7063 4934