For many executives, reading isn’t just a pastime; it’s a performance habit. IBM’s chief commercial officer, Rob Thomas, recently told me that he considers it a discipline worth mastering early in one’s career. Most mornings, he spends two to three hours reading before the workday begins, diving into biographies, history, technology, and sports to understand “what makes people and systems successful.”
He’s hardly alone. Berkshire Hathaway CEO Warren Buffett estimates he spends 80% of his working day reading, a habit he credits for sharpening his judgment over decades. His longtime partner Charlie Munger once put it plainly: “In my whole life, I have known no wise people… who didn’t read all the time—none, zero.”
Meta CEO Mark Zuckerberg famously launched a personal book club in 2015, committing to a new title every two weeks on subjects from globalization to belief systems. “Books allow you to fully explore a topic and immerse yourself in a deeper way,” he said at the time. And JPMorgan Chase CEO Jamie Dimon begins his day before dawn, poring over five newspapers to stay attuned to global currents. He has often stressed the value of reading history books and diverse perspectives to become a more thoughtful leader.
The through line: Great leaders read not just to know more, but to think better.
In conversations with some executives I’ve interviewed this year, three clear reading patterns emerged. Many gravitate toward books on strategy and systems thinking, which sharpen foresight and strengthen decision-making. Others favor works on leadership and psychology to better understand how people think and act. And nearly all incorporate biographies and narrative nonfiction that connect business to the broader human experience.
In terms of when they read, many treat it like training: 30 to 60 minutes of focused reading before the day begins; two to three hours of deep reading weekly (blocked off like a meeting); and flights and commutes reserved for longer, more reflective material.
As for what I’m currently reading? Taking Manhattan: The Extraordinary Events That Created New York and Shaped America by Russell Shorto.
Editor’s note: The deadline to apply for the Fortune Next to Lead list is Monday, Dec.1, 2025. For more information or to submit a nomination, apply here.
Ruth Umohruth.umoh@fortune.com
This story was originally featured on Fortune.com
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