Post-effective Amendment (investment Company, Rule 485(b)) (485bpos)

As filed with the Securities and Exchange Commission on February 14, 2014

Securities Act File No. 333-89389

Investment Company Act File No. 811-09637

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM N-1A


		REGISTRATION STATEMENT *UNDER* *THE SECURITIES ACT OF 1933*		x
		Pre-Effective Amendment No.		¨
		Post-Effective Amendment No. 30		x
		and/or
		REGISTRATION STATEMENT *UNDER*
		*THE INVESTMENT COMPANY ACT OF 1940*		x
		Amendment No. 31		x
		(Check appropriate box or boxes)

BLACKROCK LARGE CAP SERIES FUNDS, INC.

(Exact Name of Registrant as Specified in Charter)

100 Bellevue Parkway, Wilmington, Delaware 19809

(Address of Principal Executive Office)

Registrant’s Telephone Number, including Area Code (800) 441-7762

John M. Perlowski

BlackRock Funds

55 East 52 ^nd Street

New York, New York 10055

United States of America

(Name and Address of Agent for Service)


*Copies to:*
Counsel for the Fund:
Frank P. Bruno, Esq.		Benjamin Archibald, Esq.
Sidley Austin LLP		BlackRock Advisors, LLC
787 Seventh Avenue		55 East 52 ^nd Street
New York, New York 10019-6018		New York, New York 10055

It is proposed that this filing will become effective (check appropriate box)

x	immediately upon filing pursuant to paragraph (b)

¨	on (date)pursuant to paragraph (b)

¨	60 days after filing pursuant to paragraph (a)(1)

¨	on (date) pursuant to paragraph (a)(1)

¨	75 days after filing pursuant to paragraph (a)(2)

¨	on (date) pursuant to paragraph (a)(2) of rule 485.

If appropriate, check the following box:

¨	This post-effective amendment designates a new effective date for a previously filed post-effective amendment.

Title of Securities Being Registered: Shares of Common Stock.

Master Large Cap Series LLC has also executed this Registration Statement.

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933 and the Investment Company Act of 1940, the Registrant certifies that it meets all requirements for effectiveness of this Post-Effective Amendment to its Registration Statement pursuant to Rule 485(b) under the Securities Act of 1933 and has duly caused this Post-Effective Amendment to its Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of New York, and the State of New York, on February 14, 2014.


B LACK R OCK L ARGE C AP S ERIES F UNDS , I NC .
(R EGISTRANT )

By:		/s/ J OHN M. P ERLOWSKI
		John M. Perlowski
		President and Chief Executive Officer

Pursuant to the requirements of the Securities Act of 1933, this Post-Effective Amendment to its Registration Statement has been signed by the following persons in the capacities and on the dates indicated.


Signature	Title	Date

/s/ J OHN M. P ERLOWSKI	President and Chief Executive Officer (Principal Executive Officer)	February 14, 2014
John M. Perlowski

/s/ N EAL J. A NDREWS	Chief Financial Officer (Principal Financial and Accounting Officer)	February 14, 2014
Neal J. Andrews

D AVID O. B EIM *	Director
David O. Beim

R ONALD W. F ORBES *	Director
Ronald W. Forbes

D R . M ATINA S. H ORNER *	Director
Dr. Matina S. Horner

R ODNEY D. J OHNSON *	Director
Rodney D. Johnson

H ERBERT I. L ONDON *	Director
Herbert I. London

I AN A. M AC K INNON *	Director
Ian A. MacKinnon

C YNTHIA A. M ONTGOMERY *	Director
Cynthia A. Montgomery

J OSEPH P. P LATT *	Director
Joseph P. Platt

R OBERT C. R OBB , J R .*	Director
Robert C. Robb, Jr.



	T OBY R OSENBLATT *	Director
	Toby Rosenblatt

	K ENNETH L. U RISH *	Director
	Kenneth L. Urish

	F REDERICK W. W INTER *	Director
	Frederick W. Winter

	P AUL L. A UDET *	Director
	Paul L. Audet

	H ENRY G ABBAY *	Director
	Henry Gabbay

*By:	/s/ B ENJAMIN A RCHIBALD		February 14, 2014
	Benjamin Archibald (Attorney-In-Fact)

SIGNATURES

Master Large Cap Series LLC has duly caused this Post-Effective to the Registration Statement of BlackRock Large Cap Series Funds, Inc. to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of New York, and the State of New York, on February 14, 2014.


M ASTER L ARGE C AP S ERIES LLC

By:		/s/ J OHN M. P ERLOWSKI
		(John M. Perlowski
		President and Chief Executive Officer)

Pursuant to the requirements of the Securities Act of 1933, this Post-Effective Amendment to the Registration Statement of BlackRock Large Cap Series Funds, Inc. has been signed by the following persons in the capacities and on the dates indicated.


Signature	Title	Date

/s/ J OHN M. P ERLOWSKI	President and Chief Executive Officer (Principal Executive Officer)	February 14, 2014
John M. Perlowski

/s/ N EAL J. A NDREWS	Chief Financial Officer (Principal Financial and Accounting Officer)	February 14, 2014
Neal J. Andrews

D AVID O. B EIM *	Director
David O. Beim

R ONALD W. F ORBES *	Director
Ronald W. Forbes

D R . M ATINA S. H ORNER *	Director
Dr. Matina S. Horner

R ODNEY D. J OHNSON *	Director
Rodney D. Johnson

H ERBERT I. L ONDON *	Director
Herbert I. London

I AN A. M AC K INNON *	Director
Ian A. MacKinnon

C YNTHIA A. M ONTGOMERY *	Director
Cynthia A. Montgomery

J OSEPH P. P LATT *	Director
Joseph P. Platt

R OBERT C. R OBB , J R .*	Director
Robert C. Robb, Jr.



	T OBY R OSENBLATT *	Director
	Toby Rosenblatt

	K ENNETH L. U RISH *	Director
	Kenneth L. Urish

	F REDERICK W. W INTER *	Director
	Frederick W. Winter

	P AUL L. A UDET *	Director
	Paul L. Audet

	H ENRY G ABBAY *	Director
	Henry Gabbay

*By:	/s/ B ENJAMIN A RCHIBALD		February 14, 2014
	Benjamin Archibald (Attorney-In-Fact)

EXHIBIT INDEX


Index No.		Description of Exhibit

EX-101.INS		XBRL Instance Document

EX-101.SCH		XBRL Taxonomy Extension Schema Document

EX-101.CAL		XBRL Taxonomy Extension Calculation Linkbase

EX-101.DEF		XBRL Taxonomy Extension Definition Linkbase

EX-101.LAB		XBRL Taxonomy Extension Labels Linkbase

EX-101.PRE		XBRL Taxonomy Extension Presentation Linkbase