Global dealmaking surged to a decade-high in the first half of 2026, fueled by heavy investment in artificial intelligence (AI), strong stock markets, and a favorable regulatory environment. According to data from Dealogic, approximately $3.2 trillion worth of transactions were announced through the end of June, representing a 45 percent increase compared to the same period last year.

This spike was driven largely by a series of blockbuster deals involving some of the world’s largest companies. Forty-four transactions exceeded the $10 billion mark, covering mergers, acquisitions, and significant private market fundraising efforts. Although the overall number of deals slightly declined by about 1 percent to 21,727, the aggregate value climbed due to these high-profile transactions.

Executives and bankers attributed the current dealmaking boom to a unique window of opportunity created by a regulatory posture under the Trump administration, which they believe is more amenable to large-scale mergers than recent administrations. “Many companies perceive they have a window to attempt transformational moves, and now is really the time,” said Matt McClure, global co-head of investment banking at Goldman Sachs.

This wave differs from previous periods of dealmaking expansion, such as the COVID-19 pandemic era’s low-interest environment, the 2007 leveraged buyouts, or the dot-com bubble, analysts noted. The companies involved today tend to be among the most well-capitalized on the planet and are focusing on substantial mergers aimed at reshaping entire industries rather than smaller acquisitions.

Ben Wilson, co-head of North America mergers and acquisitions at J.P. Morgan, highlighted the evolving scale dynamics, noting that firms now need to be significantly larger to compete effectively. As an example, he cited the S&P 500, where the minimum size for inclusion has roughly doubled over the past five years.

Several headline deals underscore this trend. Utility companies NextEra Energy and Dominion Energy announced a $118 billion merger focused on supplying the growing energy demands of AI technologies. SpaceX, led by Elon Musk, acquired startup Cursor for $60 billion to help accelerate its AI capabilities in aerospace.

Despite geopolitical uncertainties, including tensions from the Middle East conflict and ongoing trade frictions, companies have pressed ahead with major deals. Jonathan Knee, a Columbia Business School professor and Evercore senior adviser, described the current surge as occurring amid “top-quartile-level uncertainty and volatility,” which runs counter to typical patterns in such conditions.

Investment banks have benefited significantly from the rebound in deal activity. Bank of America anticipates a 28 percent rise in investment banking revenues in the latest quarter, while JPMorgan Chase projects a 10 percent increase.

The private equity sector, however, has been less active, with firms holding nearly a quarter of the overall deal value this year, down from 34 percent in the preceding period. Private equity groups are struggling with valuation challenges, particularly in software companies threatened by AI advances, contributing to a softer pace than initially expected.

Initial public offerings (IPOs) during the first half of 2026 were concentrated among larger companies targeting AI and defense markets. Notable transactions include Madison Air Solutions’ $2.23 billion IPO and Cerebras’s $5.55 billion offering, a chipmaker specializing in AI hardware. SpaceX’s IPO raised more than $75 billion, marking the largest public offering on record.

Other firms are poised to enter public markets, including South Korean chipmaker SK Hynix, which plans a $28 billion U.S. listing. However, shares of recent IPOs have shown volatility; SpaceX’s stock has fluctuated but remains above its $135 IPO price. Around one-third of companies listed in the second quarter have prices below their initial offering, a trend consistent with historical patterns, according to Matt Kennedy, senior strategist at Renaissance Capital.

Market observers continue to debate the sustainability of the current AI-driven spending spree amid persistent uncertainties like inflation and global conflicts. Shares of major technology firms—dubbed the “Magnificent Seven”—helped drive the S&P 500 to its best second quarter in six years, despite a 9 percent decline in June alone. Analysts remain cautiously optimistic that AI will maintain its central role in driving dealmaking through the remainder of the year.