<SEC-DOCUMENT>0001104659-25-026158-index.html : 20250320
<SEC-HEADER>0001104659-25-026158.hdr.sgml : 20250320
<ACCEPTANCE-DATETIME>20250320162212
ACCESSION NUMBER:		0001104659-25-026158
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20250311
FILED AS OF DATE:		20250320
DATE AS OF CHANGE:		20250320

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Marsico Michael
		CENTRAL INDEX KEY:			0001907551
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	811-06565
		FILM NUMBER:		25756753

	MAIL ADDRESS:	
		STREET 1:		C/O ABRDN
		STREET 2:		1900 MARKET STREET, SUITE 200
		CITY:			PHILDADELPHIA
		STATE:			PA
		ZIP:			19103

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			abrdn Life Sciences Investors
		CENTRAL INDEX KEY:			0000884121
		STANDARD INDUSTRIAL CLASSIFICATION:	UNKNOWN SIC - 0000 [0000]
		ORGANIZATION NAME:           	
		IRS NUMBER:				043147016
		STATE OF INCORPORATION:			MA
		FISCAL YEAR END:			0930

	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>3
<SEQUENCE>1
<FILENAME>tm259812-9_3seq1.xml
<DESCRIPTION>OWNERSHIP DOCUMENT
<TEXT>
Document 1 - file: tm259812-9_3seq1.html

Document 1 - RAW XML: tm259812-9_3seq1.xml

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>2
<FILENAME>tm259812d9_ex24.htm
<DESCRIPTION>EXHIBIT 24
<TEXT>
Document 2 - file: tm259812d9_ex24.htm

</DOCUMENT>
</SEC-DOCUMENT>