In 2010, LVMH stunned the luxury world by revealing a 17% stake in Hermès, acquired secretly through equity swaps. The Hermès board, dominated by the founding Dumas family, had to act fast to preserve the company's independence. This episode dives into the boardroom's counterattack: creating a family holding company, H51, with first-refusal rights over shares, and a legal battle that lasted four years. We explore the governance tactics that kept one of France's most iconic family businesses out of Bernard Arnault's grasp, and what it teaches about board unity, fiduciary duty, and the limits of shareholder activism.