Tekla Life Sciences Investors Paid Distribution

On March 31, 2021, Tekla Life Sciences Investors paid a distribution of $0.43 per share. It is currently estimated that this distribution is derived from net realized short-term capital gains and net realized long-term capital gains. The composition of this and subsequent distributions may vary from quarter to quarter because it may be materially impacted by future realized gains and losses on securities. The aggregate of the net unrealized appreciation of portfolio securities and net realized gains on sale of securities is $178,869,122, of which $149,788,813 represents net unrealized appreciation of portfolio securities.

The following table sets forth the estimated amounts of the current distribution, paid on March 31, 2021, and the cumulative distributions paid this fiscal year-to-date from the following sources: net investment income, net realized short-term capital gains, net realized long-term capital gains and return of capital or other capital source.

	Current Distribution	Percentage Breakdown of Current Distribution	Total Cumulative Distributions for the Fiscal Year to Date1	Percentage Breakdown of the Total Cumulative Distributions for the Fiscal Year to Date1
Net Investment Income	$0.0000	0%	$0.0000	0%
Net Realized ST Cap Gains	$0.0243	6%	$0.4143	49%
Net Realized LT Cap Gains	$0.4057	94%	$0.4357	51%
Return of Capital or Other Capital Source	$0.0000	0%	$0.0000	0%
TOTAL (per common share):	$0.4300	100%	$0.8500	100%