DEERFIELD, Ill.--(BUSINESS WIRE)--The board of directors of Walgreens Boots Alliance, Inc. (Nasdaq: WBA) today declared a regular quarterly dividend of 33.75 cents per share, a 7.1 percent increase over the year ago dividend. The dividend is payable 12 June 2015 to shareholders of record as of 21 May 2015. As the successor company to Walgreen Co. after its holding company reorganization on 31 December 2014, Walgreens Boots Alliance has paid a dividend in 330 straight quarters (more than 82 year