SAN FRANCISCO — For years, Travis Kalanick, Uber’s chief executive, had his own personal “A-Team” at the ride-hailing company.

The name referred to a coterie of Uber’s top executives who were among some of the company’s early employees and had some of the same aggressive sensibilities as Mr. Kalanick. The A-Team included Emil Michael, senior vice president for business, and Eric Alexander, a top executive in Asia, as well as Thuan Pham, Uber’s chief technology officer.

Together, these executives formed Mr. Kalanick’s inner circle. They helped Uber barrel into new markets, raise funding and advance the company’s technology and systems. Based on their work, Uber soared to a nearly $70 billion valuation, reordering the transportation industry across the world along the way.

Now the original A-Team is being dismantled, signaling that the era of the boys’ club at the top is all but over at Uber.