Academic research has repeatedly confirmed that about two-thirds of all mergers and acquisitions among public companies destroy value for the acquirer, at least in the short term.

According to Boston Consulting Group, most acquirers seek to create value by capturing cost synergies. But there is more to value creation than simply identifying synergies and executing strategies to realize those synergies.  Their article lists several ways to create value including:  losing redundant plants or production lines, realizing economies of scale in purchasing, centralizing administrative functions, reducing headcount, or pushing forward other forms of streamlining.

Full article:

https://www.bcgperspectives.com/content/articles/mergers_acquisitions_postmerger_integration_divide_conquer_deals_split_synergies