LONDON, December 3, 2025 — Global mergers and acquisitions (M&A) outclassed companies not involved in dealmaking during the first nine months of this year, according to WTW research based on share price performance[1]. In partnership with the M&A Research Centre at Bayes Business School, the data shows that the M&A market is on track to achieve its best performing year since the dealmaking boom that followed the pandemic slowdown, paving the way for a stronger year ahead.
Pent-up demand, stock market highs and steady interest rates have fuelled a surge in M&A activity that gives buyers hope of a strong finish to 2025. Jana Mercereau, Head of Europe M&A Consulting at WTW, looks at five key trends companies should track for 2026:
01
“After a turbulent start to 2025 marked by aggressive tariff policies and geopolitical tensions, the recent M&A surge suggests a recalibration in the market. Buyers have learned to normalise and move through uncertainty, supported by lower financing costs and increased confidence in future growth prospects.
“At the same time, tariff volatility, geopolitical rifts and regulatory hurdles will persist in the months ahead. With more companies going for scale, early integration planning during the due diligence phase may prove one of the toughest tests for buyers looking to lock in gains and drive long-term, sustainable growth.”
02
“Eight megadeals (valued over $10 billion) closed in the third quarter of 2025, the highest since the final three months of 2018. With a similar rise in large deals (valued over $1bn), this uptick signals growing optimism in the market.
“Next year, large-scale M&A will be underpinned by a drive to de-conglomerate in order to ‘buy and build’ in the pursuit of portfolio optimisation”
Jana Mercereau | Head of Europe M&A Consulting at WTW
“Next year, large-scale M&A will be underpinned by a drive to de-conglomerate in order to ‘buy and build’ in the pursuit of portfolio optimisation - rather than higher risk, one-off transformative deals. With a focus on core strengths, this back-to-basics approach will gain traction, particularly in mid-market deals, as buyers make smaller, complementary acquisitions to achieve rapid expansion, synergies and integrate critical technologies.
“Energy, defence, biopharma and technology assets will continue to attract healthy interest in 2026. While cost of living pressures have taken the shine off consumer-focused businesses, an improved pipeline of deals is anticipated as the tariff fog clears in the coming year.”
03
“M&A market performance in Europe and APAC improved through 2025, yet the most dramatic turnaround in deal performance was in North America. Following ten consecutive negative quarters, North American buyers achieved significantly improved results, with momentum expected to extend into next year.
“Despite ongoing policy uncertainty and market volatility, robust GDP growth coupled with the Federal Reserve’s signal for additional rate cuts are easing financing conditions and driving increased strategic activity into 2026.”
04
Private equity-backed deals are projected to rise in 2026, thanks to more than $2 trillion in undeployed capital, better exit opportunities and less restrictive debt markets. Use of continuation funds will accelerate, moving from niche to mainstream, allowing PE firms to transfer one or more portfolio assets from existing, maturing funds into new vehicles. This will enable existing investors to cash out and fresh capital to buy in.”
05
“AI has rapidly emerged as a game changer in the fast-paced M&A world. Corporates are applying AI to accelerate and enhance dealmaking - from scouting high-potential targets and conducting deeper due diligence to streamlining integration.
“Innovative technologies also introduce new complexities and risks, relating to adoption, governance and reliance on human expertise, that must be carefully managed. Addressing these challenges will be key to unlocking the full potential of AI in M&A.”
Mercereau said: “The M&A outlook is optimistic, with forecasts indicating increased activity driven by larger deals focused on scale, innovation and market expansion. While volatility remains a persistent challenge and CEOs should be prepared to plan longer timelines, history shows that periods of turbulence can offer the greatest potential to create value.”
WTW’s M&A practice combines our expertise in risk and human capital to offer a full range of M&A services and solutions covering all stages of the M&A process. We have particular expertise in the areas of planning, due diligence, risk transfer and post transaction integration, areas that define the success of any transaction.
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