BlackRock reports 7.3% stake in iShares U.S. stock ETF

BlackRock reported sole voting and dispositive power; the disclosed position reflects certain business units, subsidiaries and affiliates.

Rhea-AI Filing Summary

BlackRock, Inc. (BLK), as reporting person, amended its beneficial-ownership disclosure to report 41,961,036 common shares of iShares Core S&P Total U.S. Stock Market ETF, representing 7.3% of the class as of September 30, 2026. BlackRock reported sole voting and dispositive power over all 41,961,036 shares, with zero shared voting or dispositive power. The reported position reflects securities beneficially owned or deemed beneficially owned by certain BlackRock business units and subsidiaries and affiliates, and excludes securities attributed to other business units whose ownership is disaggregated.

Key Figures

Beneficial ownership: 41,961,036 shares Percent of class: 7.3% Sole voting power: 41,961,036 shares +3 more

6 metrics

Beneficial ownership 41,961,036 shares As of September 30, 2026

Percent of class 7.3% As of September 30, 2026

Sole voting power 41,961,036 shares As of September 30, 2026

Sole dispositive power 41,961,036 shares As of September 30, 2026

Shared voting power 0 shares As of September 30, 2026

Shared dispositive power 0 shares As of September 30, 2026

Key Terms

beneficially owned, Reporting Business Units, Sole power to vote, Sole power to dispose

4 terms

beneficially owned regulatory

"Amount beneficially owned: 41961036"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

Reporting Business Units regulatory

"collectively, the "Reporting Business Units""

Sole power to vote regulatory

"Sole power to vote or to direct the vote"

Sole power to dispose regulatory

"Sole power to dispose or to direct the disposition"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many shares did BlackRock report beneficially owning in iShares Core S&P Total U.S. Stock Market ETF?

BlackRock reported beneficial ownership of 41,961,036 common shares, representing 7.3% of the class as of September 30, 2026.

Which other person is identified with an interest above 5% in the ETF?

The named other person is iShares Core S&P Total U.S. Stock Market Index ETF, whose interest in the common stock is stated to exceed 5% of the class.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 10/27/2026 - 06:21 PM EDT Accepted by SEC EDGAR 10/27/2026 - 05:25 PM EDT Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 1)

ISHARES CORE S&P TOTAL U.S. STOCK MARKET ETF

(Name of Issuer)

Common Stock

(Title of Class of Securities)

464287150

(CUSIP Number)

09/30/2026

(Date of Event Which Requires Filing of this Statement)

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

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 464287150

1

Names of Reporting Persons

BlackRock, Inc.

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 41,961,036.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 41,961,036.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

41,961,036.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

7.3 %

12

Type of Reporting Person (See Instructions)

HC

SCHEDULE 13G

Item 1.
(a)	Name of issuer: ISHARES CORE S&P TOTAL U.S. STOCK MARKET ETF
(b)	Address of issuer's principal executive offices: 400 HOWARD STREET SAN FRANCISCO CA 94105
Item 2.
(a)	Name of person filing: BlackRock, Inc. In accordance with SEC Release No. 34-39538 (January 12, 1998), this Schedule 13G reflects the securities beneficially owned, or deemed to be beneficially owned, by certain business units (collectively, the "Reporting Business Units") of BlackRock, Inc. and its subsidiaries and affiliates. It does not include securities, if any, beneficially owned by other business units whose beneficial ownership of securities are disaggregated from that of the Reporting Business Units in accordance with such release.
(b)	Address or principal business office or, if none, residence: BlackRock, Inc., 50 Hudson Yards New York, NY 10001
(c)	Citizenship: See Item 4 of Cover Page
(d)	Title of class of securities: Common Stock
(e)	CUSIP No.: 464287150
Item 4.	Ownership
(a)	Amount beneficially owned: 41961036
(b)	Percent of class: 7.3 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 41961036
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 41961036
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required. The interest of 1 such person, iShares Core S&P Total U.S. Stock Market Index ETF, in the common stock of ISHARES CORE S&P TOTAL U.S. STOCK MARKET ETF is more than five percent of the total outstanding common stock.
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	If a parent holding company has filed this schedule, pursuant to Rule 13d-1(b)(ii)(G), so indicate under Item 3(g) and attach an exhibit stating the identity and the Item 3 classification of the relevant subsidiary. If a parent holding company has filed this schedule pursuant to Rule 13d-1(c) or Rule 13d-1(d), attach an exhibit stating the identification of the relevant subsidiary. See Exhibit 99
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

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, other than activities solely in connection with a nomination under § 240.14a-11.

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.

BlackRock, Inc.

Signature:	Spencer Fleming
Name/Title:	Managing Director
Date:	10/27/2026

Exhibit Information

Exhibit 24: Power of Attorney Exhibit 99: Item 7