Health care leads all sectors with deals worth $482.3 billion in 2015, including Anthem's late July agreement to buy Cigna for $47 billion. which came just weeks after Aetna's $37 billion deal to buy Humana.
The surge has helped Goldman, one of the top deal-makers for large scale acquisitions. The firm last month reported that second-quarter investment banking revenue jumped more than 10 percent from the previous year.
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Carr sees multiple crucial factors contributing to the flurry of mergers. Amid relatively sluggish economic growth and a low interest rate environment, deals are seen as driving earnings potential, he noted.
Carr added that two-thirds of buyers, and not just the companies being swallowed up, have also enjoyed stock gains after deals this year. As many industries consolidate, executives in those industries feel pressure to make a deal or get left behind, he said.
"CEOs and boards find it very difficult to stand around and watch while that's happening," he said.
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The current environment seems healthier than the two previous banner years for M&A, 2000 and 2007, Carr added.
"To me, it's much more sensible than the last two peaks," he said.
He contended that a high price-to-earnings ratio existed in 2000, but there was "excess liquidity" in 2007.
—CNBC's Matthew Belvedere contributed to this report.