<SEC-DOCUMENT>0001104659-18-026537-index.html : 20180425
<SEC-HEADER>0001104659-18-026537.hdr.sgml : 20180425
<ACCEPTANCE-DATETIME>20180425140645
ACCESSION NUMBER:		0001104659-18-026537
CONFORMED SUBMISSION TYPE:	DEFA14A
PUBLIC DOCUMENT COUNT:		3
FILED AS OF DATE:		20180425
DATE AS OF CHANGE:		20180425
EFFECTIVENESS DATE:		20180425

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			TEKLA LIFE SCIENCES INVESTORS
		CENTRAL INDEX KEY:			0000884121
		IRS NUMBER:				043147016
		STATE OF INCORPORATION:			MA
		FISCAL YEAR END:			0930

	FILING VALUES:
		FORM TYPE:		DEFA14A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	811-06565
		FILM NUMBER:		18773810

	BUSINESS ADDRESS:	
		STREET 1:		100 FEDERAL STREET
		STREET 2:		19TH FLOOR
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02110
		BUSINESS PHONE:		6177728515

	MAIL ADDRESS:	
		STREET 1:		100 FEDERAL STREET
		STREET 2:		19TH FLOOR
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02110

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	H&Q LIFE SCIENCES INVESTORS
		DATE OF NAME CHANGE:	19920929
</SEC-HEADER>
<DOCUMENT>
<TYPE>DEFA14A
<SEQUENCE>1
<FILENAME>a18-12099_1defa14a.htm
<DESCRIPTION>DEFA14A
<TEXT>
Document 1 - file: a18-12099_1defa14a.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>g120991bgi001.gif
<DESCRIPTION>GRAPHIC
<TEXT>
Document 2 - file: g120991bgi001.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>g120991bgi002.gif
<DESCRIPTION>GRAPHIC
<TEXT>
Document 3 - file: g120991bgi002.gif

</DOCUMENT>
</SEC-DOCUMENT>