Global mergers and acquisitions activity rebounded strongly in 2025, reaching $4.5 trillion and marking the first peak since 2021, according too new data. The surge signals renewed confidence in the market following a period of economic uncertainty and stricter lending conditions [[1]]. While overall transaction volume dipped, the increase was driven by a wave of large-scale deals, particularly in the U.S., reshaping the competitive landscape across several key sectors [[2]].
Global M&A Surges to $4.5 Trillion in 2025, Marking First Peak Since 2021
Global mergers and acquisitions (M&A) activity soared to $4.5 trillion in 2025, surpassing the $4 trillion mark for the first time since the boom year of 2021, according to data from the London Stock Exchange Group. This represents a nearly 50% increase compared to the $3.06 trillion recorded in 2024.
The surge was fueled by a rebound in market conditions, improved access to financing, and a loosening of regulatory constraints in the United States, resulting in 68 “megadeals” – transactions valued at $10 billion or more – reshaping industries from media to manufacturing.
The heightened M&A activity also drove investment banking fees to approximately $135 billion, a 9% year-over-year increase and the second-highest level on record. This increase in fees reflects the substantial value of deals advised by investment banks.
Equity Deals Lead the Way
U.S. companies accounted for over half of the total deal value, with transactions totaling $2.3 trillion – the highest amount since 1998. This demonstrates the continued dominance of American firms in the global M&A landscape.
Despite the overall increase in deal value, the total number of transactions fell 7% to its lowest level since 2016. Private equity deals rose by approximately 25% to $889 billion, though challenges with exiting investments continue to persist. The data suggests a trend toward larger, more complex deals rather than a proliferation of smaller transactions.
