Top executives exit Berkshire as incoming CEO Abel names his core team

Berkshire Hathaway is facing significant leadership shifts as incoming chief executive Greg Abel begins to assemble his team ahead of taking over from Warren Buffett in January.

The conglomerate said on Monday that two senior figures, investment manager and Geico chief executive Todd Combs, and long-serving chief financial officer Mac Hamburg, are departing. According to Reuters, Combs will join JP Morgan as a special adviser to Jamie Dimon and help oversee $10 billion in investments. Hamburg is retiring after a four-decade career at Berkshire.

Combs’ exit carries particular weight. The move not only removes one of the two investment managers expected to guide Berkshire’s vast $300 billion stock portfolio, but it also leaves open how Abel will run the investment side of the business. Buffett has previously said Abel would ultimately be responsible for stock-picking, acquisitions and capital allocation across Berkshire’s dozens of operating companies. But Abel has no background as a portfolio investor, and the plan had been for Combs and fellow manager Ted Weschler to support him.

The Wall Street Journal reported that Geico’s chief operating officer, Nancy Pierce, will take over as CEO. Berkshire also created two new positions: general counsel, and a manager overseeing its broad portfolio of consumer and retail businesses. The shake-up has heightened questions around whether influential vice chairman for insurance Ajit Jain, Weschler and several long-standing subsidiary chiefs will remain under the new regime.

“There's still two elephants in the room: what’s Ajit Jain going to do and what is Ted Weschler going to do?” CFRA Research analyst Cathy Seifert said.

Combs’ departure follows a direct hiring move by Dimon, who praised him as “one of the greatest investors and leaders I’ve known”. The decision also removes one of Buffett’s key protégés from Berkshire’s succession architecture.

Analysts expect more churn as Buffett relinquishes the CEO role he has held for more than six decades. Meyer Shields of Keefe, Bruyette & Woods told Reuters that the prestige of working for Berkshire may shift now that the iconic investor is stepping back. He expects several subsidiary CEOs—many of whom continued working past typical retirement age—may choose to leave as the leadership transition unfolds.

Yet Abel’s operational reputation is strong. Executives who report to him have cited his grasp of businesses ranging from Dairy Queen to Brooks Running, Marmon Holdings and Iscar Metalworking. Buffett has himself suggested Abel’s hands-on approach could extract more value from Berkshire’s sprawling portfolio than his own.

In one of his first structural changes, Abel promoted NetJets chief executive Adam Johnson to oversee all consumer, service and retail operations, freeing Abel to continue supervising manufacturing, energy and industrial businesses including BNSF Railway and Berkshire Hathaway Energy.

Shields said he does not anticipate a dramatic strategic shift or a break-up of Berkshire under Abel. But he noted that Abel’s willingness to introduce a more conventional corporate structure marks a departure from Buffett’s famously decentralised management style.

The coming months will test how Abel balances Berkshire’s traditional autonomy with the need for clearer lines of responsibility as he takes charge of one of the world’s most closely watched conglomerates.