UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. __________)1

iShares Core MSCI Emerging ETF

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(Name of issuer)

Common Stock

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(Title of class of securities)

46434G103

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(CUSIP number)

October 1, 2013

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(Date of event that requires filing of this statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

[x] Rule 13d-1(b) (amendment under 13d-2(b))

 Rule 13d-1(c)

 Rule 13d-1(d)

________________________________

1The remainder of this cover page shall be filled out for a reporting person’s initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

SCHEDULE 13G

CUSIP No. 46434G103

Page 2 of 9 Pages

1	NAME OF REPORTING PERSONS I.R.S. Identification Nos. of above persons (entities only). USAA Asset Management Company
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) [X](b)
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION state of Delaware
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:		5	SOLE VOTING POWER 4,939,465
		6	SHARED VOTING POWER None
		7	SOLE DISPOSITIVE POWER 4,939,465
		8	SHARED DISPOSITIVE POWER None
9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 4,939,465
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES 
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 10.6%
12	TYPE OF REPORTING PERSON IA

SCHEDULE 13G

CUSIP No. 46434G103

Page 3 of 9 Pages

1	NAME OF REPORTING PERSONS I.R.S. Identification Nos. of above persons (entities only). United Services Automobile Association
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) [x] (b) 
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION state of Texas
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		5	SOLE VOTING POWER 4,939,465
		6	SHARED VOTING POWER None
		7	SOLE DISPOSITIVE POWER 4,939,465
		8	SHARED DISPOSITIVE POWER None
9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 4,939,465
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES 
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 10.6%
12	TYPE OF REPORTING PERSON HC

SCHEDULE 13G

CUSIP No. 46434G103

Page 4 of 9 Pages

1	NAME OF REPORTING PERSONS I.R.S. Identification Nos. of above persons (entities only). USAA Capital Corporation
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) [x] (b) 
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION state of Delaware
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		5	SOLE VOTING POWER 4,939,465
		6	SHARED VOTING POWER None
		7	SOLE DISPOSITIVE POWER 4,939,465
		8	SHARED DISPOSITIVE POWER None
9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 4,939,465
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES 
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 10.6%
12	TYPE OF REPORTING PERSON HC

SCHEDULE 13G

CUSIP No. 46434G103

Page 5 of 9 Pages

1	NAME OF REPORTING PERSONS I.R.S. Identification Nos. of above persons (entities only). USAA Investment Corporation
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) [x] (b) 
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION state of Delaware
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		5	SOLE VOTING POWER 4,939,465
		6	SHARED VOTING POWER None
		7	SOLE DISPOSITIVE POWER 4,939,465
		8	SHARED DISPOSITIVE POWER None
9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 4,939,465
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES 
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 10.6%
12	TYPE OF REPORTING PERSON HC

CUSIP No. 46434G103

Page 6 of 9 Pages

SCHEDULE 13G

ITEM 1.

(a) Name of Issuer:

iShares Core MSCI Emerging ETF

(b) Address of Issuer's Principal Executive Offices:

BlackRock

400 Howard Street

San Francisco, CA 94105

ITEM 2.

(a) Names of Person Filing:

USAA Asset Management Company

United Services Automobile Association

USAA Capital Corporation

USAA Investment Corporation

(b) Address of Principal Business Office, of if None, Residence:

9800 Fredericksburg Road

San Antonio, Texas 78288

Delaware

Texas

Delaware

(d) Title of Class of Securities:

Common Stock

(e) CUSIP Number:

46434G103

ITEM 3. IF THIS STATEMENT IS FILED PURSUANT TO SS.240.13d-1(b) OR 240.13d-2(b) OR (c), CHECK WHETHER THE PERSON FILING IS A:

(a) [_] Broker or dealer registered under Section 15 of the Act (15 U.S.C. 78o).

(b) [_] Bank as defined in Section 3(a)(6) of the Act (15 U.S.C. 78c).

(d)

[_]

Investment company registered under Section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8).

(e) [X] An investment adviser in accordance with ss.240.13d-1(b)(1)(ii)(E);

(f) [_] An employee benefit plan or endowment fund in accordance with ss.240.13d-1(b)(1)(ii)(F);

(g) [X] A parent holding company or control person in accordance with ss.240.13d-1(b)(1)(ii)(G);

(h) [_] A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);

(i) [_] A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);

(j) [_] Group, in accordance with ss.240.13d-1(b)(1)(ii)(J).

CUSIP No. 46434G103

Page 7 of 9 Pages

SCHEDULE 13G

ITEM 4. OWNERSHIP.

Provide the following information regarding the aggregate number and percentage of the class of securities of the issuer identified in Item 1.

(a) Amount Beneficially Owned:

4,939,465

(b) Percent of Class:

10.6%

(i)

sole power to vote or to direct the vote: 4,939,465

(ii)

shared power to vote or to direct the vote: None

(iii)

sole power to dispose or to direct the disposition of: 4,939,465

(iv)

shared power to dispose or to direct the disposition of: None

INSTRUCTION. For computations regarding securities which represent a right to acquire an underlying security SEE ss.240.13d3(d)(1).

ITEM 5. OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS.

Not Applicable

ITEM 6. OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON.

Not Applicable

ITEM 7. IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY OR CONTROL PERSON.

At October 1, 2013, USAA Asset Management Company (AMCO), an investment adviser registered under Section 203 of the Investment Advisers Act of 1940, was the beneficial owner of 4,939,465 shares of common stock of iShares Core MSCI Emerging ETF as a result of acting as investment adviser to certain clients. AMCO is a wholly owned subsidiary of USAA Investment Corporation (I-Corp), I-Corp is a wholly owned subsidiary of USAA Capital Corporation (CAPCO) and CAPCO is a wholly owned subsidiary of United Services Automobile Association (USAA). The filing of this Schedule 13G shall not be construed as an admission that any reporting person or its affiliates is for purposes of Section 13(d) or 13(g) of the Securities Exchange Act of 1934, the beneficial owner of any securities covered by this Section 13G.

ITEM 8. IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP.

Not Applicable

ITEM 9. NOTICE OF DISSOLUTION OF GROUP.

Not Applicable

CUSIP No. 46434G103

Page 8 of 9 Pages

SCHEDULE 13G

Item 10. CERTIFICATION.

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete, and correct.

Dated: November 7, 2013

USAA ASSET MANAGEMENT COMPANY

By:

/s/ James G. Whetzel

Name: James G. Whetzel

Title: Assistant Vice President and Secretary

UNITED SERVICES AUTOMOBILE ASSOCIATION

By:

/s/ Martha Leiper

Name: Martha Leiper

Title: Senior Vice President and Chief

Investment Officer

USAA CAPITAL CORPORATION

By:

/s/ Martha Leiper

Name: Martha Leiper

Title: Senior Vice President and Chief

Investment Officer

USAA INVESTMENT CORPORATION

By:

/s/ James G. Whetzel

Name: James G. Whetzel

Title: Assistant Vice President and Secretary

EXHIBIT 1

Page 9 of 9 Pages

JOINT FILING AGREEMENT

In accordance with Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended, the undersigned agree to the joint filing on behalf of each of them of a statement on Schedule 13G (including amendments thereto) with respect to the common stock of iShares Core MSCI Emerging ETF and further agree that this agreement be included as an exhibit to such filing. Each party to the agreement expressly authorizes each other party to file on its behalf any and all amendments to such statement. Each party to this agreement agrees that this joint filing agreement may be signed in counterparts.

In evidence whereof, the undersigned have caused this Agreement to be executed on their behalf this 7th day of November, 2013.

USAA ASSET MANAGEMENT COMPANY

By:

/s/ James G. Whetzel

Name: James G. Whetzel

Title: Assistant Vice President and Secretary

UNITED SERVICES AUTOMOBILE ASSOCIATION

By:

/s/ Martha Leiper

Name: Martha Leiper

Title: Senior Vice President and Chief

Investment Officer

USAA CAPITAL CORPORATION

By:

/s/ Martha Leiper

Name: Martha Leiper

Title: Senior Vice President and Chief

Investment Officer

USAA INVESTMENT CORPORATION

By:

/s/ James G. Whetzel

Name: James G. Whetzel

Title: Assistant Vice President and Secretary

USAA Asset Management Co SC 13G