CHRONOLOGY: Key dates in UBS past since Arnold left as CEO

(Reuters) - Pressure on beleaguered Swiss bank UBS AG (UBSN.VX) to break up intensified as activist investor and former chief executive Luqman Arnold demanded to shake up its governance and structure.

Following are key dates in the bank's recent history from the moment Arnold was ousted as Chief Executive.

2001

December 2001 - Luqman Arnold is ousted as CEO after only eight months following a dispute over strategy with Chairman Marcel Ospel. He is replaced by Peter Wuffli.

2002

April 2002 - UBS asset management companies are united under a single global brand, UBS Global Asset Management.

November 2002 - UBS announces the sale of its 91.15 percent equity stake in Hirslanden Holding AG.

2003

April 2003 - Acquires Lloyds Bank S.A., the French wealth management business of the British bank Lloyds TSB, significantly increasing the number of UBS clients in France.

September 2003 - It announces the acquisition of the U.S. prime brokerage operations of ABN AMRO.

October 2003 - UBS Wealth Management AG agrees to acquire the private client business of Merrill Lynch in Germany, expanding the bank's European wealth management business.

2004

May 2004 - UBS launches its Private Wealth Management Group for the U.S. market, developing products and services for ultra high net worth individuals.

November 2004 - UBS (Luxembourg) S.A. and American Express Bank (Luxembourg) S.A. reach an agreement for UBS to acquire American Express Bank's private banking activities in Luxembourg.

- UBS agrees to acquire the wealth management operations of Dresdner Bank Lateinamerika and of Julius Baer in North America.

2005  Continued...