William R. Berkley, the founder and executive chairman of W. R. Berkley Corporation, died on June 9, 2026, at 80. He built the company from a small venture he started while in business school into a Fortune 500 commercial insurer and became one of the most influential figures in American insurance.

Berkley was born in 1946 and grew up in North Jersey as the middle child of three boys. When he was 11, his father was killed in an airplane crash, and by 12 he had begun investing in the stock market with money he earned mowing lawns. That early collision with loss and self-reliance seemed to set the terms of his life: practical, disciplined, and oriented toward the long view.

He carried that approach into school. Berkley earned a B.S. from New York University’s Stern School of Business in 1966, then received an MBA from Harvard Business School in 1968. While attending Harvard, he and a partner formed Berkley Dean & Company with a $2,500 investment, a modest beginning that became the precursor to W. R. Berkley Corporation. The company itself was founded in 1967 by William R. Berkley, and from the start it reflected a founder’s instinct to build rather than merely manage.

The business began to take shape in the 1970s through a series of deliberate steps. In 1972, it entered the insurance market through the acquisition of Houston General Insurance Company. The next year, on October 19, 1973, it went public as W. R. Berkley Corporation. In 1975, it instituted a regular cash dividend policy and entered the reinsurance market by organizing Signet Reinsurance Company and acquiring Reinsurance Underwriters Corporation. The pattern was already clear: disciplined underwriting, patient expansion, and growth by acquisition without surrendering an entrepreneurial culture.

That method continued through the next decade. In 1979, the company entered specialty insurance through the purchase of Admiral Insurance Company. In 1982, it acquired Firemen’s Insurance Company of Washington, D.C. In 1985, it acquired Carolina Casualty Insurance Company and formed several specialty units, including Nautilus Insurance Company. The company was not built in one leap, but in a sequence of moves that widened its reach while preserving the founder’s preference for focus and control.

By 2001, the company had grown enough to move its common stock listing to the New York Stock Exchange. The shift marked a new level of scale for a business that had started with a $2,500 investment and a student’s ambition. By 2026, the company described itself as one of the world’s leading commercial insurance organizations and a Fortune 500 company built over nearly six decades under Berkley’s leadership. Its statement after his death said his “vision, discipline, and commitment to an entrepreneurial culture focused on underwriting excellence and long-term results” shaped its success.

Berkley also built a second legacy at New York University, where his ties stretched across nearly three decades. He gave $10 million in 2013 to establish the William R. Berkley Scholarship Program, and in 2016 NYU Stern created the William R. Berkley Scholars Fund in his honor to support high-achieving, low-income undergraduate business students. In 2021, the Berkley Family Foundation donated $50 million to NYU Stern for undergraduate scholarships, one of the largest gifts in NYU history, and Berkley and his wife Marjorie made that gift through the foundation. He also served as chair emeritus and executive vice chair of the New York University Board of Trustees, roles that reflected how deeply he had become woven into the institution’s governance and scholarship life.

The final major transition in his career came in 2015, when he stepped down from chairman and chief executive officer and became executive chairman. His son, W. Robert Berkley, Jr., became chief executive officer. Berkley described the move as part of a plan, saying, “Several years ago, our Board of Directors implemented a long-term succession plan designed to create a seamless transition for employees, customers, distribution partners and our investors.” He added, “Rob and I will continue to work together for many years to come, maintaining the forward momentum of our operations and our commitment to delivering long-term value creation for our shareholders.”

His son’s words after the transition and again after his death underscored the continuity Berkley had built. “It is a great honor and privilege to be designated as the Company's incoming CEO,” W. Robert Berkley, Jr. said in 2015, adding, “Most importantly, however, I am indebted to my father for his years of guidance and mentorship.” After Berkley died, he said, “My father was more than an extraordinary leader and entrepreneur, whose vision and values shaped the Company,” and called him “a father, best friend, and mentor.” He added that his influence on the company, the broader industry, and the lives he touched was immeasurable.

Berkley’s life was a study in continuity, from a boy who began investing after losing his father to a founder who made succession part of the enterprise itself. He left behind a company that had grown from a small venture into a durable insurance institution, and a scholarship legacy that opened doors for students who might otherwise have found them closed. He will be remembered as a builder who paired ambition with discipline, and as a philanthropist who used that success to widen opportunity.