<SEC-DOCUMENT>0001193125-23-300926-index.html : 20231221
<SEC-HEADER>0001193125-23-300926.hdr.sgml : 20231221
<ACCEPTANCE-DATETIME>20231221125855
ACCESSION NUMBER:		0001193125-23-300926
CONFORMED SUBMISSION TYPE:	497
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20231221
DATE AS OF CHANGE:		20231221
EFFECTIVENESS DATE:		20231221

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			BLACKROCK SERIES, INC.
		CENTRAL INDEX KEY:			0001062806
		ORGANIZATION NAME:           	
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			MD
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		497
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-56203
		FILM NUMBER:		231504159

	BUSINESS ADDRESS:	
		STREET 1:		100 BELLEVUE PARKWAY
		CITY:			WILMINGTON
		STATE:			DE
		ZIP:			09809
		BUSINESS PHONE:		800-441-7762

	MAIL ADDRESS:	
		STREET 1:		100 BELLEVUE PARKWAY
		CITY:			WILMINGTON
		STATE:			DE
		ZIP:			09809

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	MERCURY FUNDS INC
		DATE OF NAME CHANGE:	20010827

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	MERCURY ASSET MANAGEMENT FUNDS INC
		DATE OF NAME CHANGE:	19980714

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	MERCURY ALPHA FUND INC
		DATE OF NAME CHANGE:	19980601
<SERIES-AND-CLASSES-CONTRACTS-DATA>
<EXISTING-SERIES-AND-CLASSES-CONTRACTS>
<SERIES>
<OWNER-CIK>0001062806
<SERIES-ID>S000002291
<SERIES-NAME>BlackRock International Fund
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000005981
<CLASS-CONTRACT-NAME>Investor A
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000005983
<CLASS-CONTRACT-NAME>Investor C
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000005984
<CLASS-CONTRACT-NAME>Institutional
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000101856
<CLASS-CONTRACT-NAME>Class R Shares
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000198221
<CLASS-CONTRACT-NAME>Class K
</CLASS-CONTRACT>
</SERIES>
</EXISTING-SERIES-AND-CLASSES-CONTRACTS>
</SERIES-AND-CLASSES-CONTRACTS-DATA>
</SEC-HEADER>
<DOCUMENT>
<TYPE>497
<SEQUENCE>1
<FILENAME>d411827d497.htm
<DESCRIPTION>BLACKROCK INTERNATIONAL FUND
<TEXT>
Document 1 - file: d411827d497.htm

</DOCUMENT>
</SEC-DOCUMENT>