BOSTON--(BUSINESS WIRE)--On August 31, 2015, Tekla Healthcare Opportunities Fund paid a monthly stock distribution of $0.1125 per share. It is currently estimated that $0.0158 of this distribution is derived from net investment income and $0.0967 is derived from short-term capital gains. The composition of this and subsequent distributions may vary from month to month because it may be materially impacted by future realized gains and losses on securities. The aggregate of the net unrealized app