The origins of UBS Group AG trace back to two separate Swiss banking institutions founded in the 19th century: Union Bank of Switzerland (UBS), established in 1862 in Winterthur, and Swiss Bank Corporation (SBC), founded in 1872 in Basel. Union Bank of Switzerland was created through the merger of Bank in Winterthur (founded 1862) and Toggenburger Bank (founded 1863), initially operating as a regional bank serving the Winterthur and Toggenburg regions. The bank grew steadily through the late 19th and early 20th centuries, expanding its branch network across Switzerland and developing expertise in commercial lending and savings products. Swiss Bank Corporation, meanwhile, was established by a consortium of Basel businessmen and bankers with a focus on international trade finance, reflecting Basel's position as a hub for the chemical and pharmaceutical industries. SBC developed a reputation for innovation in international banking, establishing correspondent relationships with banks across Europe and the Americas. Both banks survived the World Wars and the Great Depression, though they faced significant challenges during the 1930s as Switzerland's banking secrecy laws — codified in the Swiss Banking Act of 1934 — transformed the country into a global haven for capital flight. In the post-war period, both banks expanded internationally. Union Bank of Switzerland established its first foreign branch in New York in 1962, while Swiss Bank Corporation opened offices in London, Hong Kong, and Singapore. The 1970s and 1980s saw both banks diversify into investment banking, asset management, and private wealth management, competing fiercely for the same ultra-high-net-worth clients. By the early 1990s, both banks were among the world's largest financial institutions, but they were also struggling with profitability in an increasingly competitive global market. The idea of a merger had been discussed periodically since the 1980s, but it was the appointment of Marcel Ospel as CEO of Swiss Bank Corporation in 1996 that catalyzed the deal. Ospel, an ambitious banker who had risen through SBC's ranks, believed that only a merged entity could compete with the emerging US and European banking giants. Negotiations began in secret in late 1997, and the merger was announced on December 8, 1997. The deal was structured as a merger of equals, though SBC was technically the acquirer, with Ospel becoming CEO of the combined entity. The new bank was initially to be called United Bank of Switzerland, but the name was shortened to UBS — a decision that proved prescient as the acronym became one of the world's most recognized financial brands. The merger was completed on June 29, 1998, creating the world's largest bank by assets at the time, with a combined balance sheet of approximately CHF 1.1 trillion. The integration was rocky: cultural clashes between the conservative UBS and the more aggressive SBC led to the departure of many senior UBS executives, and the bank struggled to integrate incompatible IT systems. In 2000, UBS acquired PaineWebber, a US brokerage firm, for $12 billion, in a move that expanded UBS's US wealth management presence but also loaded the bank with integration costs. The 2008 financial crisis nearly destroyed UBS: the bank had accumulated massive exposure to US subprime mortgage-backed securities, with losses totaling $37.5 billion in 2007-2008. The Swiss government injected CHF 6 billion in capital, and the bank was forced to accept a state bailout that included the transfer of toxic assets to a bad bank. The crisis led to the resignation of CEO Marcel Ospel and a fundamental restructuring of the bank's risk management. From 2011 to 2020, under CEO Sergio Ermotti, UBS pursued a strategy of shrinking the investment bank and focusing on wealth management, a strategy that proved successful in restoring profitability and the bank's reputation. Ermotti's first tenure saw the elimination of 10,000 jobs, the exit from fixed-income trading, and the establishment of UBS as the world's largest wealth manager. Ralph Hamers succeeded Ermotti in 2020, bringing a digital banking focus from his previous role at ING Group, but his tenure was cut short by the Credit Suisse crisis. On April 5, 2023, Ermotti returned as CEO specifically to manage the Credit Suisse integration, marking one of the most unusual CEO comebacks in banking history.