Fewer Deals, Bigger Stakes: Deciphering the 2026 M&A Landscape and the Rise of Megadeals

by Christine Short of Wall Street Horizon, 3/7/26

Takeaways

  • Thus far in 2026, total deal volume is off on a YoY basis, with announcements falling 22% vs. Jan/Feb 2025

  • While overall deal volume has started 2026 slowly, the number of megadeals ($1B+) has more than doubled, headlined by Paramount’s massive $170 billion acquisition of Warner Bros

  • Despite recent AI fears playing out in the markets, acquirers are aggressively targeting AI infrastructure, data moats, and sovereign AI capabilities within a variety of sectors

M&A Trends YTD: Lower Volume, Higher Value

With one month left in the quarter, M&A is running a little light compared to the record-breaking close of 2025. According to Wall Street Horizon’s coverage universe of 11,000 global equities, there have been 59 M&A announcements and 78 closes as of March 2. However, while overall deal volume is somewhat soft, megadeal volume (transactions over $1B) is up 57% YoY. In January/February 2025 there were fourteen $1B+ deals announced, vs. this year which has already seen 22 such deals announced.

M&A announcement

Overall, M&A activity has stabilized over the last decade. Activity between 2016 - 2018 was averaging over 1,000 deals a year. Since 2020, the market has stabilized at a much lower new normal of approximately 400–500 announcements annually.

And while M&A announcements were down in January and February 2026 (57 in 2026 vs. 73 in 2025, a decrease of nearly 22%), closes are slightly up (76 in 2026 vs. 71 in 2025, up 7%). This suggests that while the pipeline of new deals has started 2026 more slowly, the rate of completing existing deals from late 2025 remains steady.

Something else to note is that the time required to finalize a deal (from announcement to close) has nearly tripled in the last decade. Wall Street Horizon data shows the following:

  • 2016–2019 Average: ~53 days

  • 2020–2024 Average: ~150 days

For 2026, none of the 59 announced deals have closed yet within the dataset's timeframe. Given the current average of ~150 days to close, we should expect the bulk of early 2026 announcements to impact close figures starting in late Q2 or Q3 of 2026.