<SEC-DOCUMENT>0001104659-24-069987-index.html : 20240610
<SEC-HEADER>0001104659-24-069987.hdr.sgml : 20240610
<ACCEPTANCE-DATETIME>20240610143455
ACCESSION NUMBER:		0001104659-24-069987
CONFORMED SUBMISSION TYPE:	N-CSRS
PUBLIC DOCUMENT COUNT:		11
CONFORMED PERIOD OF REPORT:	20240331
FILED AS OF DATE:		20240610
DATE AS OF CHANGE:		20240610
EFFECTIVENESS DATE:		20240610

FILER:

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

	FILING VALUES:
		FORM TYPE:		N-CSRS
		SEC ACT:		1940 Act
		SEC FILE NUMBER:	811-06565
		FILM NUMBER:		241032324

	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>N-CSRS
<SEQUENCE>1
<FILENAME>tm2416006d11_ncsrs.htm
<DESCRIPTION>N-CSRS
<TEXT>
Document 1 - file: tm2416006d11_ncsrs.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.CERT
<SEQUENCE>2
<FILENAME>tm2416006d11_ex99-cert.htm
<DESCRIPTION>EXHIBIT 99.CERT
<TEXT>
Document 2 - file: tm2416006d11_ex99-cert.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.906CERT
<SEQUENCE>3
<FILENAME>tm2416006d11_ex99-906cert.htm
<DESCRIPTION>EXHIBIT 99.906CERT
<TEXT>
Document 3 - file: tm2416006d11_ex99-906cert.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.(C)(1)
<SEQUENCE>4
<FILENAME>tm2416006d11_ex99-xcx1.htm
<DESCRIPTION>EXHIBIT 99.(C)(1)
<TEXT>
Document 4 - file: tm2416006d11_ex99-xcx1.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.(C)(2)
<SEQUENCE>5
<FILENAME>tm2416006d11_ex99-xcx2.htm
<DESCRIPTION>EXHIBIT 99.(C)(2)
<TEXT>
Document 5 - file: tm2416006d11_ex99-xcx2.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>6
<FILENAME>tm2416006d11_ex-99xcx1img01.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 6 - file: tm2416006d11_ex-99xcx1img01.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>7
<FILENAME>tm2416006d11_ex-99xcx2img01.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 7 - file: tm2416006d11_ex-99xcx2img01.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>8
<FILENAME>tm2416006d11hqlreporti001.gif
<DESCRIPTION>GRAPHIC
<TEXT>
Document 8 - file: tm2416006d11hqlreporti001.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>9
<FILENAME>tm2416006d11hqlreporti002.gif
<DESCRIPTION>GRAPHIC
<TEXT>
Document 9 - file: tm2416006d11hqlreporti002.gif

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<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>10
<FILENAME>tm2416006d11hqlreporti003.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 10 - file: tm2416006d11hqlreporti003.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>11
<FILENAME>tm2416006d11hqlreporti004.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 11 - file: tm2416006d11hqlreporti004.jpg

</DOCUMENT>
</SEC-DOCUMENT>