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			 O'Day, now head of Roche's pharmaceuticals business, joined the 
			company in 1987 and held various roles in the United States before 
			moving in 1998 to headquarters in Basel, Switzerland. 
 O'Day's hiring comes about four months after Gilead said in July 
			that Chief Executive John Milligan and Chairman John Martin would 
			step down at the end of the year.
 
 Jefferies analysts said in a note that O'Day's three decades of 
			oncology and global commercial expertise at Roche should help Gilead 
			build out its own global presence, particularly in new areas it is 
			entering including oncology and inflammation as well as through more 
			acquisitions and in-licensing deals.
 
 
			
			 
			At Roche, O'Day was a champion of bi-specific antibodies that are 
			under development as a potentially less expensive, less complicated 
			alternative to CAR-T therapy where T cells must be taken out of the 
			body, re-engineered and re-infused.
 
 With Gilead's Yescarta therapy, O'Day is now on the opposite side of 
			the divide.
 
 Separately, Roche said William Anderson, current CEO of its 
			Genentech business, would replace O'Day next year.
 
 Anderson joined Roche in 2006, leading the immunology business unit 
			in Genentech, and then took charge of oncology sales and marketing. 
			In 2013, he became head of global product strategy based in Basel 
			before assuming his current role at Genentech in 2017.
 
			
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			Vontobel analyst Stefan Schneider called Anderson a "seasoned Roche 
			manager" who played a key role in leading multiple sclerosis drug 
			Ocrevus to success and driving double-digit growth in the U.S. 
			market. 
			Gilead said on Monday that Martin would step down from the company's 
			board of directors, effective March 1, 2019.
 Up to Friday's close, the company's shares have fallen nearly 14 
			percent since Milligan and Martin's departures were announced by 
			Gilead in July.
 
 The Wall street Journal first reported O'Day's hiring on Sunday.
 
 Gilead said its board had appointed Gregg Alton as interim chief 
			executive for the period of January 1, 2019 until O'Day's start date 
			of March 1, 2019.
 
 Roche shares were down 0.6 percent by mid-morning, in line with the 
			Stoxx European health care sector index.
 
 (Reporting by Liana Baker in New York; Additional reporting by 
			Ismail Shakil and Philip George in Bengaluru and by John Miller and 
			Michael Shields in Zurich; Editing by Sunil Nair and Mark Potter)
 
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