The return of the megadeal: The biggest M&A transactions of 2026 (so far)

After a cautious period, 2026 has marked a decisive return to the megadeal. The first five months of the year have delivered a wave of transformative transactions, with several exceeding the $50 billion mark and one specifically rewriting the record books for the largest acquisition in history.

From AI-driven infrastructure to massive media consolidation, here are the five most significant M&A deals of 2026 so far:

A consortium led by BlackRock’s Global Infrastructure Partners (GIP) and EQT signed a definitive agreement to take AES Corporation private.

• The Driver: The deal reflects an insatiable appetite for grid infrastructure and renewable assets, specifically to power the massive energy demands of AI data centers.
• Status: Announced in March 2026; expected to close in late 2026 or early 2027.

4. McCormick & Company to acquire Unilever’s foods business – $44.8bn

In a move that reshapes the consumer goods landscape, McCormick agreed to merge with Unilever’s food division (including iconic brands like Knorr and Hellmann’s).

• The Driver: McCormick nearly doubles its size, creating a global “flavor powerhouse.” For Unilever, the carve-out allows a sharper focus on high-growth beauty and personal care segments.
• Status: Agreement announced in late March 2026.

3. Devon Energy acquires Coterra Energy – $58bn

Consolidation in the Permian Basin continues at scale. Devon Energy completed its all-stock merger with Coterra Energy, creating a premier independent oil and gas producer.

• The Driver: Size and capital discipline. The merger aims to optimize operations in U.S. shale, prioritizing shareholder returns through an $8 billion buyback program and increased dividends.
• Status: Completed in early May 2026.

2. Paramount acquires Warner Bros. Discovery – $111bn

The media “deal of the decade” finally moved forward as Paramount (backed by Skydance) successfully moved to acquire Warner Bros. Discovery.

• The Driver: Survival of the fittest in the streaming wars. By combining libraries (HBO, CNN, CBS, and Paramount+), the new entity seeks the scale necessary to compete with Netflix and Disney.
• Status: Approved by shareholders in April 2026; currently navigating intense regulatory scrutiny.

1. SpaceX acquires xAI – $250bn (revised valuation)

Topping the list—and becoming the largest M&A deal of all time—is SpaceX’s acquisition of xAI. While early rumors suggested $125 billion, the finalized transaction value is recognized closer to $250 billion when factoring in equity swaps and the valuation of the combined tech stack.

• The Driver: The convergence of physical and digital frontiers. Elon Musk’s move integrates xAI’s “Grok” and specialized LLMs directly into SpaceX’s Starlink satellite network and Starship navigation systems, creating a space-based AI infrastructure.
• Status: Initiated in early 2026; widely considered the “megamerger” of the century.

2026 M&A trends: strategic reinvention

As we analyze these movements, three core themes emerge for the remainder of 2026:

• M&A as a Transformation Tool: Companies are no longer buying just for market share. They are buying to gain immediate AI capabilities (SpaceX/xAI) or to pivot their entire business model toward the energy transition (BlackRock/AES).
• Portfolio Streamlining: Large conglomerates are becoming “leaner.” The McCormick-Unilever deal is a textbook example of “carve-out” strategy, where companies shed non-core assets to unlock hidden value.
• High Execution Risk: Financing conditions have improved, but geopolitical and regulatory hurdles are at an all-time high. The Paramount/WBD deal, in particular, is being watched as a bellwether for how much concentration regulators will permit in 2026.

ONEtoONE Corporate Finance is an international M&A advisor with 90+ offices worldwide. With over 2,500 mandates completed, we support clients through every stage of corporate transactions, ensuring that even in a market of giants, your strategic goals remain the priority.