    <SEC-DOCUMENT>0001104659-25-034659-index.html : 20250414
    <SEC-HEADER>0001104659-25-034659.hdr.sgml : 20250414
    <ACCEPTANCE-DATETIME>20250414155900
    ACCESSION NUMBER:		0001104659-25-034659
    CONFORMED SUBMISSION TYPE:	DEF 14A
    PUBLIC DOCUMENT COUNT:		12
    CONFORMED PERIOD OF REPORT:	20250528
    FILED AS OF DATE:		20250414
    DATE AS OF CHANGE:		20250414

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			abrdn World Healthcare Fund
    		CENTRAL INDEX KEY:			0001635977
    		ORGANIZATION NAME:
    		EIN:				000000000
    		STATE OF INCORPORATION:			MA
    		FISCAL YEAR END:			0930

    	FILING VALUES:
    		FORM TYPE:		DEF 14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	811-23037
    		FILM NUMBER:		25835974

    	BUSINESS ADDRESS:
    		STREET 1:		1900 MARKET STREET
    		STREET 2:		SUITE 200
    		CITY:			PHILADELPHIA
    		STATE:			PA
    		ZIP:			19103
    		BUSINESS PHONE:		(617) 772-8515

    	MAIL ADDRESS:
    		STREET 1:		1900 MARKET STREET
    		STREET 2:		SUITE 200
    		CITY:			PHILADELPHIA
    		STATE:			PA
    		ZIP:			19103

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	Tekla World Healthcare Fund
    		DATE OF NAME CHANGE:	20150306

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			abrdn Healthcare Opportunities Fund
    		CENTRAL INDEX KEY:			0001604522
    		ORGANIZATION NAME:
    		EIN:				465317248
    		STATE OF INCORPORATION:			MA
    		FISCAL YEAR END:			0930

    	FILING VALUES:
    		FORM TYPE:		DEF 14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	811-22955
    		FILM NUMBER:		25835975

    	BUSINESS ADDRESS:
    		STREET 1:		1900 MARKET STREET
    		STREET 2:		SUITE 200
    		CITY:			PHILADELPHIA
    		STATE:			PA
    		ZIP:			19103
    		BUSINESS PHONE:		617-772-8500

    	MAIL ADDRESS:
    		STREET 1:		1900 MARKET STREET
    		STREET 2:		SUITE 200
    		CITY:			PHILADELPHIA
    		STATE:			PA
    		ZIP:			19103

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	Tekla Healthcare Opportunities Fund
    		DATE OF NAME CHANGE:	20140407

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	Tekla Healthcare Growth & Income Fund
    		DATE OF NAME CHANGE:	20140402

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			abrdn Healthcare Investors
    		CENTRAL INDEX KEY:			0000805267
    		ORGANIZATION NAME:
    		EIN:				046564285
    		STATE OF INCORPORATION:			MA
    		FISCAL YEAR END:			0930

    	FILING VALUES:
    		FORM TYPE:		DEF 14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	811-04889
    		FILM NUMBER:		25835977

    	BUSINESS ADDRESS:
    		STREET 1:		1900 MARKET STREET
    		STREET 2:		SUITE 200
    		CITY:			PHILADELPHIA
    		STATE:			PA
    		ZIP:			19103
    		BUSINESS PHONE:		6177728515

    	MAIL ADDRESS:
    		STREET 1:		1900 MARKET STREET
    		STREET 2:		SUITE 200
    		CITY:			PHILADELPHIA
    		STATE:			PA
    		ZIP:			19103

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	TEKLA HEALTHCARE INVESTORS
    		DATE OF NAME CHANGE:	20141015

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	H&Q HEALTHCARE INVESTORS
    		DATE OF NAME CHANGE:	19920703

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			abrdn Life Sciences Investors
    		CENTRAL INDEX KEY:			0000884121
    		ORGANIZATION NAME:
    		EIN:				043147016
    		STATE OF INCORPORATION:			MA
    		FISCAL YEAR END:			0930

    	FILING VALUES:
    		FORM TYPE:		DEF 14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	811-06565
    		FILM NUMBER:		25835976

    	BUSINESS ADDRESS:
    		STREET 1:		1900 MARKET STREET
    		STREET 2:		SUITE 200
    		CITY:			PHILADELPHIA
    		STATE:			PA
    		ZIP:			19103
    		BUSINESS PHONE:		6177728515

    	MAIL ADDRESS:
    		STREET 1:		1900 MARKET STREET
    		STREET 2:		SUITE 200
    		CITY:			PHILADELPHIA
    		STATE:			PA
    		ZIP:			19103

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	TEKLA LIFE SCIENCES INVESTORS
    		DATE OF NAME CHANGE:	20141015

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	H&Q LIFE SCIENCES INVESTORS
    		DATE OF NAME CHANGE:	19920929
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>DEF 14A
    <SEQUENCE>1
    <FILENAME>tm2512004d1_def14a.htm
    <DESCRIPTION>DEF 14A
    <TEXT>
    Document 1 - file: tm2512004d1_def14a.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>2
    <FILENAME>j25120042_ba001.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 2 - file: j25120042_ba001.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>j25120042_ba002.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 3 - file: j25120042_ba002.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>4
    <FILENAME>j25120042_ba003.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 4 - file: j25120042_ba003.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>5
    <FILENAME>tm2512004d1_hqhprximg01.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 5 - file: tm2512004d1_hqhprximg01.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>6
    <FILENAME>tm2512004d1_hqhprximg02.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 6 - file: tm2512004d1_hqhprximg02.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>7
    <FILENAME>tm2512004d1_hqllifsciimg01.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 7 - file: tm2512004d1_hqllifsciimg01.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>8
    <FILENAME>tm2512004d1_hqllifsciimg02.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 8 - file: tm2512004d1_hqllifsciimg02.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>9
    <FILENAME>tm2512004d1_thqhelthimg01.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 9 - file: tm2512004d1_thqhelthimg01.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>10
    <FILENAME>tm2512004d1_thqhelthimg02.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 10 - file: tm2512004d1_thqhelthimg02.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>11
    <FILENAME>tm2512004d1_thwwrldimg01.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 11 - file: tm2512004d1_thwwrldimg01.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>12
    <FILENAME>tm2512004d1_thwwrldimg02.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 12 - file: tm2512004d1_thwwrldimg02.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>