<SEC-DOCUMENT>0001104659-25-057741-index.html : 20250609
<SEC-HEADER>0001104659-25-057741.hdr.sgml : 20250609
<ACCEPTANCE-DATETIME>20250609140634
ACCESSION NUMBER:		0001104659-25-057741
CONFORMED SUBMISSION TYPE:	N-CSRS
PUBLIC DOCUMENT COUNT:		12
CONFORMED PERIOD OF REPORT:	20250331
FILED AS OF DATE:		20250609
DATE AS OF CHANGE:		20250609
EFFECTIVENESS DATE:		20250609

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:		N-CSRS
		SEC ACT:		1940 Act
		SEC FILE NUMBER:	811-04889
		FILM NUMBER:		251033551

	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
</SEC-HEADER>
<DOCUMENT>
<TYPE>N-CSRS
<SEQUENCE>1
<FILENAME>tm2516624d11_ncsrs.htm
<DESCRIPTION>N-CSRS
<TEXT>
Document 1 - file: tm2516624d11_ncsrs.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.CERT
<SEQUENCE>2
<FILENAME>tm2516624d11_ex99-cert.htm
<DESCRIPTION>EXHIBIT 99.CERT
<TEXT>
Document 2 - file: tm2516624d11_ex99-cert.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.906CERT
<SEQUENCE>3
<FILENAME>tm2516624d11_ex99-906cert.htm
<DESCRIPTION>EXHIBIT 99.906CERT
<TEXT>
Document 3 - file: tm2516624d11_ex99-906cert.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.(C)(1)
<SEQUENCE>4
<FILENAME>tm2516624d11_ex99-xcx1.htm
<DESCRIPTION>EXHIBIT 99.(C)(1)
<TEXT>
Document 4 - file: tm2516624d11_ex99-xcx1.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.(C)(2)
<SEQUENCE>5
<FILENAME>tm2516624d11_ex99-xcx2.htm
<DESCRIPTION>EXHIBIT 99.(C)(2)
<TEXT>
Document 5 - file: tm2516624d11_ex99-xcx2.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>6
<FILENAME>tm2516624d11hqhreporti001.gif
<DESCRIPTION>GRAPHIC
<TEXT>
Document 6 - file: tm2516624d11hqhreporti001.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>7
<FILENAME>tm2516624d11hqhreporti002.gif
<DESCRIPTION>GRAPHIC
<TEXT>
Document 7 - file: tm2516624d11hqhreporti002.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>8
<FILENAME>tm2516624d11hqhreporti003.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 8 - file: tm2516624d11hqhreporti003.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>9
<FILENAME>tm2516624d11_ex99-xcx2img001.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 9 - file: tm2516624d11_ex99-xcx2img001.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>10
<FILENAME>tm2516624d11_ex99-xcx2img002.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 10 - file: tm2516624d11_ex99-xcx2img002.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>11
<FILENAME>tm2516624d11_ex99-xcx1img001.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 11 - file: tm2516624d11_ex99-xcx1img001.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>12
<FILENAME>tm2516624d11_ex99-xcx1img002.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 12 - file: tm2516624d11_ex99-xcx1img002.jpg

</DOCUMENT>
</SEC-DOCUMENT>