<SEC-DOCUMENT>0001410368-15-001366-index.html : 20151124
<SEC-HEADER>0001410368-15-001366.hdr.sgml : 20151124
<ACCEPTANCE-DATETIME>20151124131357
ACCESSION NUMBER:		0001410368-15-001366
CONFORMED SUBMISSION TYPE:	NSAR-B
PUBLIC DOCUMENT COUNT:		3
CONFORMED PERIOD OF REPORT:	20150930
FILED AS OF DATE:		20151124
DATE AS OF CHANGE:		20151124
EFFECTIVENESS DATE:		20151124

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:		NSAR-B
		SEC ACT:		1940 Act
		SEC FILE NUMBER:	811-06565
		FILM NUMBER:		151251910

	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>NSAR-B
<SEQUENCE>1
<FILENAME>answer.fil
<DESCRIPTION>NSAR-B
<TEXT>
Document 1 - file: answer.fil

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.77B ACCT LTTR
<SEQUENCE>2
<FILENAME>hqlnsaretter77b.txt
<DESCRIPTION>EXHIBIT 77B
<TEXT>
Document 2 - file: hqlnsaretter77b.txt

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.77C VOTES
<SEQUENCE>3
<FILENAME>hqlvotingresults77c.txt
<DESCRIPTION>EXHIBIT 77C
<TEXT>
Document 3 - file: hqlvotingresults77c.txt

</DOCUMENT>
</SEC-DOCUMENT>