Union Bank of Switzerland (UBS) was a large integrated financial services company located in Switzerland.
 The bank, which at the time was the second largest bank in Switzerland, merged with Swiss Bank Corporation in 1998, to become UBS to form what was then the largest bank in Europe and the second largest bank in the World.
Brinson Partners (later known as UBS Brinson) was an asset management firm focused on providing access for U.S. institutions to global markets.
 The firm was founded by noted investor Gary P. Brinson in the 1980s and established as an independent firm in 1989.
 Brinson was acquired by Swiss Bank Corporation in 1994 and became the core of the Swiss bank's asset management business in the U.S.
Phillips & Drew was a large stockbroking partnership and company based in the City of London, England.
 It was fully acquired by the Union Bank of Switzerland in 1986, which itself merged with the Swiss Bank Corporation in 1998, to become UBS AG.
Warburg Dillon Read was an investment bank created by the Swiss Bank Corporation ("SBC"), following its 1997 acquisition of S. G. Warburg & Co. which it merged with Dillon, Read & Co., a firm it had acquired in 1995.
 SBC itself merged with the Union Bank of Switzerland in 1998, creating UBS AG.
 Warburg Dillon Read was subsequently renamed UBS Warburg and eventually just UBS Investment Bank.
UBS AG is a Swiss global financial services company, incorporated in the Canton of Zurich, and co-headquartered in Zürich and Basel.
 The company provides wealth management, asset management, and investment banking services for private, corporate, and institutional clients worldwide, and is generally considered to be a bulge bracket bank.
 In Switzerland, these services are also offered to retail clients.
 The name "UBS" was originally an abbreviation for the Union Bank of Switzerland, but it ceased to be a representational abbreviation after the bank's merger with the Swiss Bank Corporation in 1998.
 The company traces its origins to 1856, when the earliest of its predecessor banks was founded.
O'Connor & Associates was a Chicago-based options trading firm, with particular emphasis on financial derivatives.
 The firm was acquired by Swiss Bank Corporation (later merged with Union Bank of Switzerland to form UBS).
Foley v Hill (1848) 2 HLC 28, 9 ER 1002 is a judicial decision of the House of Lords in relation to the fundamental nature of a bank account.
 Together with "Joachimson v Swiss Bank Corporation" [1921] 3 KB 110 it forms part of the foundational cases relating to English banking law and the nature of a bank's relationship with its customer in relation to the account.
Prediction Company was founded in Santa Fe, New Mexico, USA, in March 1991 by J. Doyne Farmer, Norman Packard and James McGill.
 The company uses forecasting techniques to build black-box trading systems for financial markets, mainly employing statistical learning theory.
 In September 1992, Prediction Company entered into an exclusive contract with O'Connor and Associates, a Chicago derivatives trading house, to provide investment advice and technology.
 Soon after O'Connor merged with Swiss Bank Corporation, which later merged with Union Bank of Switzerland (UBS).
 Prediction Company's contract was renewed multiple times and in 2005 UBS purchased Prediction Company outright.
 After being a wholly owned subsidiary of UBS, Prediction Company was acquired in 2013 by an affiliate of Millennium Partners, L.P.
Gary P. Brinson is a former investor and money manager.
 He is the founder of Brinson Partners a Chicago-based asset management firm acquired in 1994 by Swiss Bank Corporation, the predecessor of UBS.
 Prior to retiring in 2000, Brinson would run the asset management division of Swiss Bank Corporation and later UBS Global Asset Management.
The Bank in Winterthur is one of the original predecessor banks to the Union Bank of Switzerland and ultimately UBS.
 Established in 1862, the bank merged with Toggenburger Bank in 1912 to form the Union Bank of Switzerland.

Question: What bank merged to creathe the Swiss Bank Corporation?
Answer: Union Bank of Switzerland