** Emerging markets-focused bank's shares up 1.2pct, among top FTSE-100 gainers, as CEO Bill Winters announceschanges to its management structure
** Heads of major units will report to Winters rather thanto his deputy Mike Rees, starting Oct. 1
** Stock second-highest gainer on FTSE 350 Banks Index
** Analysts say market is reacting well to move by Wintersto take the reins from Rees, who has been at the bank for 25years
** Shares of larger rival HSBC up 1.1 pct on Citiupgrade to "buy"
(venkateshasoumithri.mamidipudi.thomsonreuters.com@reuters.net)