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    ACCESSION NUMBER:		0001104659-17-037217
    CONFORMED SUBMISSION TYPE:	N-CSRS
    PUBLIC DOCUMENT COUNT:		20
    CONFORMED PERIOD OF REPORT:	20170331
    FILED AS OF DATE:		20170602
    DATE AS OF CHANGE:		20170602
    EFFECTIVENESS DATE:		20170602

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			TEKLA HEALTHCARE INVESTORS
    		CENTRAL INDEX KEY:			0000805267
    		IRS NUMBER:				046564285
    		STATE OF INCORPORATION:			MA
    		FISCAL YEAR END:			0930

    	FILING VALUES:
    		FORM TYPE:		N-CSRS
    		SEC ACT:		1940 Act
    		SEC FILE NUMBER:	811-04889
    		FILM NUMBER:		17887762

    	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 HEALTHCARE INVESTORS
    		DATE OF NAME CHANGE:	19920703
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