As filed with the U.S. Securities and Exchange Commission on March 15, 2013

Securities Act File No. 333-92935

Investment Company Act File No. 811-09729

UNITED STATES

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. 842	x
and/or
REGISTRATION STATEMENT
UNDER
THE INVESTMENT COMPANY ACT OF 1940	x
Amendment No. 842	x

(Check appropriate box or boxes)

iShares Trust

(Exact Name of Registrant as Specified in Charter)

c/o State Street Bank and Trust Company

200 Clarendon Street

Boston, MA 02116

(Address of Principal Executive Office)(Zip Code)

Registrant’s Telephone Number, including Area Code (415) 670-2000

The Corporation Trust Company

1209 Orange Street

Wilmington, DE 19801

(Name and Address of Agent for Service)

With Copies to:

MARGERY K. NEALE, ESQ.
WILLKIE FARR &
GALLAGHER LLP
787 SEVENTH AVENUE
NEW YORK, NY 10019-6099 BENJAMIN J. HASKIN, ESQ.
WILLKIE FARR &
GALLAGHER LLP
1875 K STREET, N.W.
WASHINGTON, D.C. 20006-1238 EDWARD BAER, ESQ. BLACKROCK FUND ADVISORS 400 HOWARD STREET SAN FRANCISCO, CA 94105

Continuous

(March 15, 2013)

It is proposed that this filing will become effective:

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.

This filing relates solely to the following Funds, each a series of iShares Trust:

iShares Aaa – A Rated Corporate Bond Fund

iShares B – Ca Rated Corporate Bond Fund

iShares Baa – Ba Rated Corporate Bond Fund

iShares Barclays 0-5 Year TIPS Bond Fund

iShares Barclays CMBS Bond Fund

iShares Barclays GNMA Bond Fund

iShares Barclays TIPS Bond Fund

iShares Barclays U.S. Treasury Bond Fund

iShares Core Short-Term U.S. Bond ETF

iShares Financials Sector Bond Fund

iShares Floating Rate Note Fund

iShares Global Inflation-Linked Bond Fund

iShares Industrials Sector Bond Fund

iShares International Inflation-Linked Bond Fund

iShares J.P. Morgan USD Emerging Markets Bond Fund

iShares S&P/Citigroup 1-3 Year International Treasury Bond Fund

iShares S&P/Citigroup International Treasury Bond Fund

iShares Utilities Sector Bond Fund

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, as amended, and the Investment Company Act of 1940, as amended, the Registrant certifies that it meets all the requirements for the effectiveness of this Registration Statement pursuant to Rule 485(b) under the Securities Act of 1933, as amended, and has duly caused this Post-Effective Amendment No. 842 to the Registration Statement to be signed on its behalf by the undersigned, duly authorized, in the City of San Francisco and the State of California on the 15^th day of March, 2013.

iSHARES TRUST

By:
	Michael Latham*
	President and Trustee
	Date: March 15, 2013

Pursuant to the requirements of the Securities Act of 1933, as amended, this Post-Effective Amendment No. 842 to the Registration Statement has been signed below by the following persons in the capacities and on the date indicated.

By:
	Michael Latham*
	President and Trustee
	Date: March 15, 2013
	John E. Martinez*
	Trustee
	Date: March 15, 2013
	George G.C. Parker*
	Trustee
	Date: March 15, 2013
	Cecilia H. Herbert*
	Trustee
	Date: March 15, 2013
	Charles A. Hurty*
	Trustee
	Date: March 15, 2013

	John E. Kerrigan*
	Trustee
	Date: March 15, 2013
	Robert H. Silver*
	Trustee
	Date: March 15, 2013
	Robert S. Kapito*
	Trustee
	Date: March 15, 2013
	Madhav V. Rajan*
	Trustee
	Date: March 15, 2013
	/s/ Jack Gee
	Jack Gee
	Treasurer
	Date: March 15, 2013
*By:	/s/ Jack Gee
	Jack Gee
	Attorney-in-fact
	Date: March 15, 2013

* Powers of Attorney, each dated December 6, 2011, for Michael A. Latham, Charles A. Hurty, Cecilia H. Herbert, John E. Kerrigan, Robert H. Silver, George G.C. Parker, John E. Martinez, Madhav V. Rajan and Robert S. Kapito are incorporated herein by reference to Post-Effective Amendment No. 717, filed March 8, 2012.

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