<SEC-DOCUMENT>0001193125-14-372227-index.html : 20141016
<SEC-HEADER>0001193125-14-372227.hdr.sgml : 20141016
<ACCEPTANCE-DATETIME>20141015110641
ACCESSION NUMBER:		0001193125-14-372227
CONFORMED SUBMISSION TYPE:	485BPOS
PUBLIC DOCUMENT COUNT:		8
FILED AS OF DATE:		20141015
DATE AS OF CHANGE:		20141015
EFFECTIVENESS DATE:		20141015

FILER:

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

	FILING VALUES:
		FORM TYPE:		485BPOS
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-56203
		FILM NUMBER:		141156807

	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

FILER:

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

	FILING VALUES:
		FORM TYPE:		485BPOS
		SEC ACT:		1940 Act
		SEC FILE NUMBER:	811-08797
		FILM NUMBER:		141156808

	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>S000002290
<SERIES-NAME>BlackRock Small Cap Growth Fund II
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000005976
<CLASS-CONTRACT-NAME>Investor A
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000005977
<CLASS-CONTRACT-NAME>Investor B
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000005978
<CLASS-CONTRACT-NAME>Investor C
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<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000005979
<CLASS-CONTRACT-NAME>Institutional
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<CLASS-CONTRACT>
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<CLASS-CONTRACT-NAME>Class R
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</SEC-HEADER>
<DOCUMENT>
<TYPE>485BPOS
<SEQUENCE>1
<FILENAME>d783208d485bpos.htm
<DESCRIPTION>BLACKROCK SERIES, INC.
<TEXT>
Document 1 - file: d783208d485bpos.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-101.INS
<SEQUENCE>3
<FILENAME>brs-20140929.xml
<DESCRIPTION>XBRL INSTANCE DOCUMENT
<TEXT>
Document 3 - file: brs-20140929.xml

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-101.SCH
<SEQUENCE>4
<FILENAME>brs-20140929.xsd
<DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA
<TEXT>
Document 4 - file: brs-20140929.xsd

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-101.CAL
<SEQUENCE>5
<FILENAME>brs-20140929_cal.xml
<DESCRIPTION>XBRL TAXONOMY EXTENSION CALCULATION LINKBASE
<TEXT>
Document 5 - file: brs-20140929_cal.xml

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<DOCUMENT>
<TYPE>EX-101.DEF
<SEQUENCE>6
<FILENAME>brs-20140929_def.xml
<DESCRIPTION>XBRL TAXONOMY EXTENSION DEFINITION LINKBASE
<TEXT>
Document 6 - file: brs-20140929_def.xml

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<DOCUMENT>
<TYPE>EX-101.LAB
<SEQUENCE>7
<FILENAME>brs-20140929_lab.xml
<DESCRIPTION>XBRL TAXONOMY EXTENSION LABEL LINKBASE
<TEXT>
Document 7 - file: brs-20140929_lab.xml

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<DOCUMENT>
<TYPE>EX-101.PRE
<SEQUENCE>8
<FILENAME>brs-20140929_pre.xml
<DESCRIPTION>XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE
<TEXT>
Document 8 - file: brs-20140929_pre.xml

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<TYPE>GRAPHIC
<SEQUENCE>9
<FILENAME>g783208sid.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 9 - file: g783208sid.jpg

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<DOCUMENT>
<TYPE>EXCEL
<SEQUENCE>10
<FILENAME>Financial_Report.xlsx
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 10 - file: Financial_Report.xlsx

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<TYPE>XML
<SEQUENCE>11
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<TEXT>
Document 11 - file: report.css

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<TYPE>ZIP
<SEQUENCE>12
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Document 12 - file: 0001193125-14-372227-xbrl.zip

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<TYPE>XML
<SEQUENCE>13
<FILENAME>R9.htm
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 13 - file: R9.htm

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<TYPE>EXCEL
<SEQUENCE>14
<FILENAME>Financial_Report.xls
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 14 - file: Financial_Report.xls

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<TYPE>XML
<SEQUENCE>15
<FILENAME>R2.htm
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 15 - file: R2.htm

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<TYPE>XML
<SEQUENCE>16
<FILENAME>Show.js
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 16 - file: Show.js

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<TYPE>XML
<SEQUENCE>17
<FILENAME>R1.htm
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<TEXT>
Document 17 - file: R1.htm

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<TYPE>GRAPHIC
<SEQUENCE>18
<FILENAME>BarChart1.jpg
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 18 - file: BarChart1.jpg

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<DOCUMENT>
<TYPE>XML
<SEQUENCE>19
<FILENAME>R10.htm
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 19 - file: R10.htm

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<DOCUMENT>
<TYPE>XML
<SEQUENCE>20
<FILENAME>FilingSummary.xml
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 20 - file: FilingSummary.xml

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