<SEC-DOCUMENT>0001193125-19-302495.txt : 20191127
<SEC-HEADER>0001193125-19-302495.hdr.sgml : 20191127
<ACCEPTANCE-DATETIME>20191127160533
ACCESSION NUMBER:		0001193125-19-302495
CONFORMED SUBMISSION TYPE:	497
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20191127
DATE AS OF CHANGE:		20191127
EFFECTIVENESS DATE:		20191127

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			BlackRock Health Sciences Trust
		CENTRAL INDEX KEY:			0001314966
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE

	FILING VALUES:
		FORM TYPE:		497
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-230158
		FILM NUMBER:		191257862

	BUSINESS ADDRESS:	
		STREET 1:		100 BELLEVUE PARKWAY
		CITY:			WILMINGTON
		STATE:			DE
		ZIP:			19809
		BUSINESS PHONE:		(888) 825-2257

	MAIL ADDRESS:	
		STREET 1:		100 BELLEVUE PARKWAY
		CITY:			WILMINGTON
		STATE:			DE
		ZIP:			19809
</SEC-HEADER>
<DOCUMENT>
<TYPE>497
<SEQUENCE>1
<FILENAME>d614596d497.htm
<DESCRIPTION>BLACKROCK HEALTH SCIENCES TRUST
<TEXT>
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<TITLE>BLACKROCK HEALTH SCIENCES TRUST</TITLE>
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 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="right">Filed Pursuant to Rule 497(e) <BR> Registration File No.: 333-230158 </P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>BLACKROCK HEALTH SCIENCES TRUST </B></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>Supplement dated November&nbsp;27, 2019 to the </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>Prospectus dated April&nbsp;29, 2019 </B></P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">This
supplement amends certain information in the Prospectus, dated April&nbsp;29, 2019, of BlackRock Health Sciences Trust (the &#147;Fund&#148;). Unless otherwise indicated, all other information included in the Prospectus that is not inconsistent with
the information set forth in this supplement remains unchanged. Capitalized terms not otherwise defined in this supplement have the same meanings as in the Prospectus. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Effective December&nbsp;1, 2019, the following changes are made to the Prospectus: </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><I>In the section entitled &#147;Item 3. Fee Table and Synopsis &#150; 1.&#148; in Part I of the Prospectus, footnote 8 to the fee table is deleted in its
entirety and replaced with the following: </I></P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="4%" VALIGN="top" ALIGN="left">(8)</TD>
<TD ALIGN="left" VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman; " ALIGN="left">The Fund and the Advisor have also entered into a fee waiver agreement (the &#147;Fee Waiver Agreement&#148;),
pursuant to which the Advisor has contractually agreed to waive the management fee with respect to any portion of the Fund&#146;s assets attributable to investments in any equity and fixed-income mutual funds and exchange-traded funds managed by the
Advisor or its affiliates that have a contractual management fee, through June&nbsp;30, 2021. In addition, pursuant to the Fee Waiver Agreement, the Advisor has contractually agreed to waive its management fees by the amount of investment advisory
fees the Fund pays to the Advisor indirectly through its investment in money market funds managed by the Advisor or its affiliates, through June&nbsp;30, 2021. The Fee Waiver Agreement may be terminated at any time, without the payment of any
penalty, only by the Fund (upon the vote of a majority of the Independent Trustees or a majority of the outstanding voting securities of the Fund), upon 90 days&#146; written notice by the Fund to the Advisor. </P></TD></TR></TABLE>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><I>In the section entitled &#147;Item 20. Investment Advisory and Other Services &#150; 1.&#148; in Part I of the Prospectus, footnote 1 to the table is
deleted in its entirety and replaced with the following: </I></P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="4%" VALIGN="top" ALIGN="left">(1)</TD>
<TD ALIGN="left" VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman; " ALIGN="left">The Fund and the Advisor have entered into the Fee Waiver Agreement, pursuant to which the Advisor has
contractually agreed to waive the management fee with respect to any portion of the Fund&#146;s assets estimated to be attributable to investments in any equity and fixed-income mutual funds and exchange-traded funds managed by the Advisor or its
affiliates that have a contractual management fee, through June&nbsp;30, 2021. The Fee Waiver Agreement may be terminated at any time, without the payment of any penalty, only by the Fund (upon the vote of a majority of the Independent Trustees or a
majority of the outstanding voting securities of the Fund), upon 90 days&#146; written notice by the Fund to the Advisor. For the period December&nbsp;2, 2016 to December&nbsp;31, 2016 and the years ended December&nbsp;31, 2017 and December&nbsp;31,
2018, the Advisor did not waive any fees pursuant to this arrangement under the Fee Waiver Agreement. </P></TD></TR></TABLE> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="4%" VALIGN="top" ALIGN="left">&nbsp;&nbsp;</TD>
<TD ALIGN="left" VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman; " ALIGN="left">In addition, effective December&nbsp;1, 2019, pursuant to the Fee Waiver Agreement, the Advisor has
contractually agreed to waive its management fees by the amount of investment advisory fees the Fund pays to the Advisor indirectly through its investment in money market funds advised by the Advisor or its affiliates, through June&nbsp;30, 2021.
Prior to December&nbsp;1, 2019, such agreement to waive a portion of the Fund&#146;s management fee in connection with the Fund&#146;s investment in affiliated money market funds was voluntary. Pursuant to these arrangements, the figures in the
table above reflect waivers by the Advisor of its fees in the amounts of $8,521, $7,086 and $9,713 for the years ended December&nbsp;31, 2018, December&nbsp;31, 2017 and December&nbsp;31, 2016, respectively. </P></TD></TR></TABLE>

<p Style='page-break-before:always'>
<HR SIZE="3" style="COLOR:#999999" WIDTH="100%" ALIGN="CENTER">
 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><I>The last paragraph of the <FONT STYLE="white-space:nowrap">sub-section</FONT> entitled &#147;Item 9.
Management &#150; Investment Management Agreement&#148; of Part II of the Prospectus is deleted and replaced with the following: </I></P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">The Fund and the
Advisor have entered into the Fee Waiver Agreement, pursuant to which the Advisor has contractually agreed to waive the management fee with respect to any portion of the Fund&#146;s assets estimated to be attributable to investments in any equity
and fixed-income mutual funds and ETFs managed by the Advisor or its affiliates that have a contractual management fee, through June&nbsp;30, 2021. In addition, effective December&nbsp;1, 2019, pursuant to the Fee Waiver Agreement, the Advisor has
contractually agreed to waive its management fees by the amount of investment advisory fees the Fund pays to the Advisor indirectly through its investment in money market funds advised by the Advisor or its affiliates, through June&nbsp;30, 2021.
The Fee Waiver Agreement may be continued from year to year thereafter, provided that such continuance is specifically approved by the Advisor and the Fund (including by a majority of the Fund&#146;s Independent Trustees). Neither the Advisor nor
the Fund is obligated to extend the Fee Waiver Agreement. The Fee Waiver Agreement may be terminated at any time, without the payment of any penalty, only by the Fund (upon the vote of a majority of the Independent Trustees of the Fund or a majority
of the outstanding voting securities of the Fund), upon 90 days&#146; written notice by the Fund to the Advisor. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>Investors should
retain this supplement for future reference. </B></P>
 <p STYLE="margin-top:0pt;margin-bottom:0pt ; font-size:8pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">-&nbsp;2&nbsp;- </P>

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