April 23, 2025

Board Composition: A Strategic Asset or Challenging Weakness

In a recent article published by the National Association of Corporate Directors (NACD), A&M Managing Directors Conor Johnston, Paul Kinrade, Annie Peabody and Andy Walker examine how board composition can be a cornerstone for corporate success or an anchor that weighs down financial performance.

Alvarez & Marsal’s study of more than 3,000 companies across the U.S. and Europe sheds light on the tangible impact board makeup has on shareholder value, company agility and long-term outcomes. The data reveals how structural and individual board characteristics can either contribute to or hinder high performance.

Key Research Insights

Board Composition Factors That Influence Performance:

Tenure: Directors at high-performing companies served nearly 20% longer than those at low-performing ones.

Board refreshment: Boards with a wider range of member tenures, mixing fresh perspectives with seasoned experience, delivered stronger results.

Split leadership wins: Companies that separated the CEO and board chair roles outperformed their peers that combined the CEO and chair roles by 1.4x.

Right-sized boards by company type:

  • Fortune 100: Larger boards (12+ directors) outperformed their subsector peers by 2.6x.

  • Russell 2000: Smaller boards (fewer than 8 directors) outperformed larger ones by 6.3x.

Explore the full findings and learn what differentiates high-performing boards from the rest.

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