 On March 31, 2020, Tekla World Healthcare Fund paid a monthly distribution of 0.1167 per share. It is currently estimated that this distribution is derived from return of capital or other capital source. 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 depreciation of portfolio securities and net realized losses on sale of securities is -108,271,405, of which 102,810,331 represents net unrealized depreciation of portfolio securities. 