The merger of the two groups would create a giant with a market capitalization of $230 billion.
An AstraZeneca spokesperson said the group did not comment on rumors or assumptions. Gilead did not wish to comment.
Gilead is particularly active in the treatment of HIV with its drug Biktarvy, which had sales of $1.69 billion in the first quarter.
AstraZeneca also has Tagrisso, a treatment for lung cancer, which generated $982 million in sales in the first three months of the year.
From a chartist's point of view, AstraZeneca escaped from a short term bullish channel and entered into a consolidation move. The daily Relative strength Index (RSI, 14) fell below 50% and is capped by a declining trend line. Bollinger bands are widening.
As long as 8811p is resistance, a decline towards 8046p and 7685p is likely. Alternatively, a push above 8811p would reinstate a bullish bias with 9600p as target.
Source: GAIN Capital, TradingView