** Shares of Whitehaven Coal WHC.AX rise as much as 4.4% to A$5.065, their highest level since April 15
** Coal miner reports a 5% sequential fall in quarterly output but it came in ahead of analyst expectations
** Stock on track for its best day since April 14 - if current gains hold
** Stock down over 20% this year, including the day's move
(Reporting by Rajasik Mukherjee in Bengaluru)
((Rajasik.Mukherjee@thomsonreuters.com))