Deri Llewellyn-Davies’s publications

Deri Llewellyn-Davies grew up in a small rural village in Wales, where community wasn’t a concept, it was how life worked. That early sense of shared responsibility shaped how he later approached leadership, decision-making, and pressure, long before he entered boardrooms and high-stakes environments. Over three decades, Deri has advised and sat on more than 330 boards, becoming known for spotting the real constraint beneath the noise and helping organisations think clearly when the stakes are high. His signature Strategy on a Page methodology is a no 1 best seller and has inspired thousands of founders to scale with purpose.

Outside business, Deri has spent years testing human limits in extreme environments — climbing six of the world’s highest mountains, completing the Marathon des Sables, and racing the infamous Ironman. Those experiences became a lab for understanding how people actually perform under pressure, and why so many high-achievers quietly collapse when the adrenaline wears off.

That intersection of boardroom pattern recognition and extreme performance thinking led to the creation of Ultra States, a framework that reframes performance as state selection rather than motivation. Instead of treating focus, flow, connection, recovery, and peak intensity as accidents or personality traits, Ultra States examines them as distinct neurological and physiological conditions, each with trade-offs when misused or overextended.