Strategically, the story of 2026 so far is that the great rebound in global dealmaking is holding. Across the first five months of 2026, global M&A was up 41% year-over-year at $2.4 trillion, Bain & Company reports in its M&A Midyear Report released Monday — a pace that, if sustained, would top $5.3 trillion for the year, just shy of the 2020 record of $5.6 trillion and good for the second-highest year ever. That follows 2025, when M&A climbed 40% to $4.9 trillion, itself the second-highest annual total on record.
The calculus behind the buying is what stands out to Bain’s analysts. The resurgence, they conclude, is broad-based across markets and sectors and grounded in the strategic transformations companies now need to compete — executives chasing long-term efficiency, resilience, adaptability and growth amid a stack of disruptions: the accelerating shift toward an AI-driven economy, plus slowing economic growth, higher inflation, and the shuttering of the Strait of Hormuz, which the firm calls the latest manifestation of an emerging post-global order. The numbers beneath the surge: strategic M&A value up 36% year-to-date even as valuations stayed flat at a median multiple of 11.6 times enterprise value/EBITDA, with deal count up only a modest 2%. Energy and natural resources, industrials, and healthcare and life sciences contributed the most absolute growth; financial sponsors had a slower start, with deal value down 9% through May; and venture capital, supercharged by OpenAI’s latest $122 billion funding round, saw deal value surge 206% with a 36% rise in deal count.
Megadeals are the engine. Transactions above the $10 billion mark grew 52% by number and 53% by value against a year earlier, and the funding mix within them has moved to a historical high of 35% in stock-plus-cash, sending the all-cash share of deal value down to a cyclical low of 55%. Europe became a global hot spot in the first half: megadeals powered a 77% year-over-year jump across the Europe, Middle East and Africa region through May 31, spanning domestic consolidation (Orange, Bouygues and Iliad’s $24 billion offer for Altice France), regional scale (Italy’s UniCredit reviving its approach to Germany’s Commerzbank) and global reach (Finland’s Kone launching a $34.4 billion bid for Germany’s TK Elevator). NextEra Energy and Dominion Energy, two US utilities, have proposed a $119 billion merger driven in part by explosive growth in energy-hungry data centers, shows how far beyond technology the logic now runs.
What Bain brands the “winner’s paradox” is the broader stake for the acquirers signing those checks: how to run an ambitious M&A agenda and an AI transformation at the same time. “The great M&A rebound of 2025 was no one-off blip, and the strategic logic driving it has only intensified,” said Suzanne Kumar, executive vice president of Bain’s global M&A practice. In her telling, the AI boom fueling many of these deals is also creating the paradox: it has rarely been harder to get large, complex transactions right, yet they represent the single biggest opportunity if you do. The timelines sharpen the squeeze. Large deals, Bain’s data show, can frequently run 36 months or longer from announcement to full integration; deals above $10 billion need roughly seven months to close, then need another 24 to 36 months to capture most of the run-rate cost synergies. The payoff side: leading integration programs are using AI to confirm cost-synergy opportunities at two to three times the speed of traditional diligence. “Integration has always carried both peril and promise, but the AI overlay is raising the stakes on both sides,” Kumar adds, and the report frames six questions — from how AI affects the deal thesis to how integration management should evolve — as the foundation for deals that succeed on both fronts at once.
A second reading, from McKinsey’s February trend report, corroborates the direction. In its figures, 2025 deal value rose 43 percent to $4.7 trillion — a full 20 percent over the $3.9 trillion ten-year average — with 60 deals clearing the $10 billion mark — the most since the 2021 peak — and large trades doubling in value, up 112 percent to $1.3 trillion. Ten transactions exceeded $30 billion in 2025 against four in 2024, among them Union Pacific’s $89.5 billion agreement to buy Norfolk Southern and build America’s first transcontinental railroad. (The two consultancies’ 2025 totals differ — $4.9 trillion at Bain, $4.7 trillion at McKinsey — a gap of measurement, not of direction.)
What this signals, in the end, is scale as the strategy: companies buying their way to the capability and resilience they no longer believe they can build in time, in a world economy fragmenting under AI disruption and geopolitical shock. The discipline question the paradox poses — whether an acquirer can transform what it buys while integrating it — is now, on Bain’s reading, the difference between the companies setting tomorrow’s rules and those playing by yesterday’s.
Sources
- Global M&A momentum builds in 2026 as megadeals surge, but acquirers confront a new AI “winner’s paradox”—Bain & Company M&A Midyear Report | Bain & Company
- Global M&A trends: Navigating a rapidly rebounding market | McKinsey
