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Directorship Magazine

Why Mergers Fail When Strategy Is 'Right'

By David Fubini and Patrick Sanguineti

09/14/2026

Directorship Magazine Member-Only Mergers & Acquisitions
Key Points
  • Integration is the ultimate determinant of whether a merger creates or destroys value, making it the board's most consequential oversight responsibility.
  • Boards should push management beyond public deal narratives to articulate and rigorously test a precise, operational rationale that anchors every valuation, diligence, and integration decision.
  • Protecting the base business during a merger requires deliberate structural separation and active board vigilance.

This AI-generated summary, based on content on this page, was reviewed by NACD editors for accuracy.

Mergers and acquisitions (M&A) promise transformative growth, yet even the most strategically sound deals routinely fall short. Why? The culprit is far more operational and preventable.

When it comes to M&A, boards carry a more demanding responsibility than many directors realize—one that begins well before a deal is announced. This article identifies the specific failure points that undermine deal value before and during the transaction. It also offers a framework for what boards should demand from management, what to scrutinize during due diligence, and what signals require urgent attention once integration is underway.

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David Fubini Headshot

 

David Fubini is a senior lecturer of business administration at Harvard Business School. He also serves on the board of Leidos, J.M. Huber Corp., and Bain Capital Specialty Finance, and is senior partner emeritus at McKinsey & Co. 

Patrick Sanguineti Headshot

 

 

Patrick Sanguineti is a research associate at Harvard Business School. 

This article was informative.

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