2021 PROSPECTUS - BLACKROCK

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                                                                      SEPTEMBER 1, 2021

              2021 Prospectus

         iShares Trust
         • iShares U.S. Technology ETF | IYW | NYSE ARCA

         The Securities and Exchange Commission (“SEC”) has not approved or disapproved
         these securities or passed upon the adequacy of this prospectus. Any representation to
         the contrary is a criminal offense.
iShares®
                              iShares, Inc.
                             iShares Trust
                        iShares U.S. ETF Trust
       Supplement dated January 3, 2022 (the “Supplement”)
            to each Summary Prospectus, Prospectus and
          Statement of Additional Information (the “SAI”),
     for each of the Funds listed in Appendix A (each, a “Fund”)
The information in this Supplement updates information in, and
should be read in conjunction with the respective Summary
Prospectus, Prospectus and the SAI, as applicable, for each Fund.
The following changes for the Fund went effective on January 1,
2022.
As of January 1, 2022, Paul Whitehead has replaced Alan Mason as
Portfolio Manager for each Fund listed on Appendix A. References to
Mr. Mason as a Portfolio Manager of each Fund are hereby removed
from the Summary Prospectus, Prospectus and SAI.
The other Portfolio Managers for each Fund will continue to be
primarily responsible for the day-to-day management of such Fund in
addition to Mr. Whitehead. Information regarding the other Portfolio
Managers for each Fund can be found in such Fund’s Summary
Prospectus, Prospectus and SAI.
In addition, the following changes are made to each Fund’s Summary
Prospectus, Prospectus, and SAI:
In the sections “Management – Portfolio Managers” of each Fund’s
Summary Prospectus and Prospectus, Paul Whitehead is added to
the list of Portfolio Managers primarily responsible for the
day-to-day management of the Fund. Mr. Whitehead has been a
Portfolio Manager of each Fund since 2022.
In the section “Management – Portfolio Managers” of each Fund’s
Prospectus, the following is added:
Paul Whitehead has been with BlackRock since 1996, including his
years with Barclays Global Investors, which merged with BlackRock in
2009. Mr. Whitehead has been employed by BlackRock as a Managing
Director since 2010 and a Director from 2009 to 2010. Mr. Whitehead
was employed by Barclays Global Investors as Principal from 2002 to
2009. Mr. Whitehead has been a Portfolio Manager of the Fund since
2022.
In the section “Portfolio Managers” of each Fund’s SAI, the following
is added to the table listing each Portfolio Manager’s other types of
portfolios and/or accounts:
Paul Whitehead*

Types of Accounts                                    Number      Total Assets

Registered Investment Companies                           N/A       N/A
Other Pooled Investment Vehicles                          N/A       N/A
Other Accounts                                            N/A       N/A

*Information for Mr. Whitehead is provided as of November 30, 2021.

In the section “Portfolio Managers” of each Fund’s SAI, the following
is added to the table listing each Portfolio Manager’s portfolios or
accounts with respect to which the investment management fees are
based on the performance of those portfolios or accounts:
Paul Whitehead*

                                    Number of Other
                                     Accounts with
                                    Performance Fees
                                   Managed by Portfolio    Aggregate of Total
Types of Accounts                       Manager                 Assets

Registered Investment
  Companies                               N/A                    N/A
Other Pooled Investment
  Vehicles                                N/A                    N/A
Other Accounts                            N/A                    N/A

*Information for Mr. Whitehead is provided as of November 30, 2021.
For the Funds listed in the below table, in the section “Portfolio Managers”
of the applicable Fund’s SAI, the following is added to the table listing each
Portfolio Manager’s beneficial ownership of shares of the Funds for which
they are primarily responsible for the day-to-day management:
Paul Whitehead*
                                            Dollar Range
                                  $10,001 $50,001 $100,001 $500,001
                           $1 to    to       to        to     to    Over
Fund                      $10,000 $50,000 $100,000 $500,000 $1 mil $1 mil

iShares Core Dividend
  Growth ETF                         X
iShares MSCI EAFE
  Min Vol Factor ETF        X
iShares Global Clean
  Energy ETF                X
iShares Cybersecurity
  and Tech ETF              X
iShares Core S&P
  Small-Cap ETF             X
iShares Global
  Financials ETF            X
iShares Global Tech ETF     X
iShares US Energy ETF       X
iShares MSCI USA
  Multifactor ETF           X
iShares MSCI USA
  Momentum Factor
  ETF                       X
iShares MSCI USA
  Quality Factor ETF        X
iShares MSCI USA
  Value Factor ETF          X

*Information for Mr. Whitehead is provided as of November 30, 2021.

As of November 30, 2021, Mr. Whitehead did not beneficially own any
shares of a Fund for which he is primarily responsible for the day-to-day
management which is not listed in the above table.
Appendix A
Supplement to the Summary Prospectus and Prospectus both dated
as of March 1, 2021, and to the Statement of Additional Information
dated as of March 1, 2021 (as revised October 29, 2021):
iShares Commodity Curve Carry Strategy ETF
iShares GSCI Commodity Dynamic Roll Strategy ETF

Supplement to the Summary Prospectus and Prospectus both dated
as of March 1, 2021, and to the Statement of Additional Information
dated as of March 1, 2021 (as revised January 3, 2022):
iShares Bloomberg Roll Select Commodity Strategy ETF
iShares Gold Strategy ETF

Supplement to the Summary Prospectus and Prospectus both dated
as of July 30, 2021, and to the Statement of Additional Information
dated as of July 30, 2021 (as revised January 3, 2022):
iShares Asia 50 ETF
iShares Emerging Markets Infrastructure ETF
iShares Global 100 ETF
iShares Global Comm Services ETF
iShares Global Consumer Discretionary ETF
iShares Global Healthcare ETF
iShares Global Materials ETF
iShares Global Tech ETF
iShares Global Timber & Forestry ETF
iShares International Dividend Growth ETF
iShares Latin America 40 ETF

Supplement to the Summary Prospectus and Prospectus both dated
as of July 30, 2021 (as revised October 18, 2021), and to the
Statement of Additional Information dated as of July 30, 2021 (as
revised January 3, 2022):
iShares Global Clean Energy ETF

Supplement to the Summary Prospectus and Prospectus both dated
as of July 30, 2021 (as revised October 13, 2021), and to the
Statement of Additional Information dated as of July 30, 2021 (as
revised January 3, 2022):
iShares India 50 ETF
Supplement to the Summary Prospectus and Prospectus both dated
as of July 30, 2021, and to the Statement of Additional Information
dated as of July 30, 2021 (as revised January 3, 2022):
iShares Biotechnology ETF
iShares Core S&P 500 ETF
iShares Core S&P Mid-Cap ETF
iShares Core S&P Small-Cap ETF
iShares Core S&P Total U.S. Stock Market ETF
iShares Core S&P U.S. Growth ETF
iShares Core S&P U.S. Value ETF
iShares ESG Screened S&P 500 ETF
iShares ESG Screened S&P Mid-Cap ETF
iShares ESG Screened S&P Small-Cap ETF
iShares Europe ETF
iShares Expanded Tech Sector ETF
iShares Expanded Tech-Software Sector ETF
iShares Factors US Growth Style ETF
iShares Factors US Value Style ETF
iShares Focused Value Factor ETF
iShares Global Consumer Staples ETF
iShares Global Energy ETF
iShares Global Financials ETF
iShares Global Industrials ETF
iShares Global Infrastructure ETF
iShares Global Utilities ETF
iShares International Developed Property ETF
iShares International Developed Small Cap Value Factor ETF
iShares JPX-Nikkei 400 ETF
iShares Micro-Cap ETF
iShares Mortgage Real Estate ETF
iShares North American Natural Resources ETF
iShares North American Tech-Multimedia Networking ETF
iShares Residential and Multisector Real Estate ETF
iShares Russell 1000 ETF
iShares Russell 1000 Growth ETF
iShares Russell 1000 Value ETF
iShares Russell 2000 ETF
iShares Russell 2000 Growth ETF
iShares Russell 2000 Value ETF
iShares Russell 3000 ETF
iShares Russell Mid-Cap ETF
iShares Russell Mid-Cap Growth ETF
iShares Russell Mid-Cap Value ETF
iShares Russell Top 200 ETF
iShares Russell Top 200 Growth ETF
iShares Russell Top 200 Value ETF
iShares S&P 100 ETF
iShares S&P 500 Growth ETF
iShares S&P 500 Value ETF
iShares S&P Mid-Cap 400 Growth ETF
iShares S&P Mid-Cap 400 Value ETF
iShares S&P Small-Cap 600 Growth ETF
iShares S&P Small-Cap 600 Value ETF
iShares Semiconductor ETF
iShares U.S. Aerospace & Defense ETF
iShares U.S. Broker-Dealers & Securities Exchanges ETF
iShares U.S. Healthcare Providers ETF
iShares U.S. Home Construction ETF
iShares U.S. Insurance ETF
iShares U.S. Medical Devices ETF
iShares U.S. Oil & Gas Exploration & Production ETF
iShares U.S. Oil Equipment & Services ETF
iShares U.S. Pharmaceuticals ETF
iShares U.S. Real Estate ETF
iShares U.S. Regional Banks ETF
iShares U.S. Telecommunications ETF
iShares US Small Cap Value Factor ETF

Supplement to the Summary Prospectus and Prospectus both dated
as of July 30, 2021 (as revised October 20, 2021), and to the
Statement of Additional Information dated as of July 30, 2021 (as
revised January 3, 2022):
iShares U.S. Infrastructure ETF

Supplement to the Summary Prospectus and Prospectus both dated
as of July 30, 2021 (as revised October 1, 2021), and to the
Statement of Additional Information dated as of July 30, 2021 (as
revised January 3, 2022):
iShares Preferred and Income Securities ETF

Supplement to the Summary Prospectus and Prospectus both dated
as of July 30, 2021, and to the Statement of Additional Information
dated as of July 30, 2021 (as revised September 10, 2021):
iShares Currency Hedged JPX-Nikkei 400 ETF
Supplement to the Summary Prospectus and Prospectus both dated
as of July 30, 2021, and to the Statement of Additional Information
dated as of July 30, 2021 (as revised January 3, 2022):
iShares Russell 2500 ETF

Supplement to the Summary Prospectus and Prospectus both dated
as of September 1, 2021, and to the Statement of Additional
Information dated as of September 1, 2021 (as revised
September 10, 2021):
iShares Asia/Pacific Dividend ETF
iShares Emerging Markets Dividend ETF

Supplement to the Summary Prospectus and Prospectus both dated
as of September 1, 2021, and to the Statement of Additional
Information dated as of September 1, 2021 (as revised
September 10, 2021):
iShares Global REIT ETF
iShares International Select Dividend ETF

Supplement to the Summary Prospectus and Prospectus both dated
as of September 1, 2021, and to the Statement of Additional
Information dated as of September 1, 2021 (as revised January 3,
2022):
iShares Cohen & Steers REIT ETF
iShares Core Dividend Growth ETF
iShares Core High Dividend ETF
iShares Core U.S. REIT ETF
iShares Dow Jones U.S. ETF
iShares International Developed Real Estate ETF
iShares Morningstar Growth ETF
iShares Morningstar Mid-Cap ETF
iShares Morningstar Mid-Cap Growth ETF
iShares Morningstar Mid-Cap Value ETF
iShares Morningstar Small-Cap ETF
iShares Morningstar Small-Cap Growth ETF
iShares Morningstar Small-Cap Value ETF
iShares Morningstar U.S. Equity ETF
iShares Morningstar Value ETF
iShares MSCI KLD 400 Social ETF
iShares MSCI USA ESG Select ETF
iShares Select Dividend ETF
iShares U.S. Basic Materials ETF
iShares U.S. Consumer Discretionary ETF
iShares U.S. Consumer Staples ETF
iShares U.S. Dividend and Buyback ETF
iShares U.S. Energy ETF
iShares U.S. Financial Services ETF
iShares U.S. Financials ETF
iShares U.S. Healthcare ETF
iShares U.S. Industrials ETF
iShares U.S. Technology ETF
iShares U.S. Transportation ETF
iShares U.S. Utilities ETF

Supplement to the Summary Prospectus dated as of November 3,
2021, and to the Prospectus dated as of October 25, 2021, and to the
Statement of Additional Information dated as of October 25, 2021
(as revised January 3, 2022):
iShares ESG MSCI USA Min Vol Factor ETF

Supplement to the Summary Prospectus, Prospectus and Statement
of Additional Information each dated as of December 1, 2021:
iShares Core MSCI Europe ETF
iShares Core MSCI Pacific ETF
iShares Currency Hedged MSCI ACWI ex U.S. ETF
iShares Currency Hedged MSCI EAFE ETF
iShares Currency Hedged MSCI EAFE Small-Cap ETF
iShares MSCI Kokusai ETF

Supplement to the Prospectus and Statement of Additional
Information both dated as of December 1, 2021:
iShares Core Aggressive Allocation ETF
iShares Core Conservative Allocation ETF
iShares Core Growth Allocation ETF
iShares Core Moderate Allocation ETF
iShares ESG Aware Aggressive Allocation ETF
iShares ESG Aware Conservative Allocation ETF
iShares ESG Aware Growth Allocation ETF
iShares ESG Aware Moderate Allocation ETF
Supplement to the Summary Prospectus and Prospectus both dated
as of December 1, 2021, and to the Statement of Additional
Information dated as of December 1, 2021 (as revised (as revised
December 20, 2021):
iShares Cloud 5G and Tech ETF
iShares Core MSCI EAFE ETF
iShares Core MSCI International Developed Markets ETF
iShares Core MSCI Total International Stock ETF
iShares Cybersecurity and Tech ETF
iShares Genomics Immunology and Healthcare ETF
iShares MSCI ACWI ETF
iShares MSCI ACWI ex U.S. ETF
iShares MSCI ACWI Low Carbon Target ETF
iShares MSCI All Country Asia ex Japan ETF
iShares MSCI China A ETF
iShares MSCI Global Multifactor ETF
iShares Robotics and Artificial Intelligence Multisector ETF
iShares Self-Driving EV and Tech ETF
iShares Virtual Work and Life Multisector ETF

Supplement to the Summary Prospectus and Prospectus both dated
as of December 1, 2021 (as revised December 20, 2021), and to the
Statement of Additional Information dated as of December 1, 2021
(as revised December 20, 2021):
iShares Exponential Technologies ETF
Supplement to the Summary Prospectus and Prospectus both dated
as of December 1, 2021, and to the Statement of Additional
Information dated as of December 1, 2021 (as revised January 3,
2022):
iShares China Large-Cap ETF
iShares MSCI EAFE ETF
iShares MSCI EAFE Growth ETF
iShares MSCI EAFE Min Vol Factor ETF
iShares MSCI EAFE Small-Cap ETF
iShares MSCI EAFE Value ETF
iShares MSCI Europe Financials ETF
iShares MSCI Europe Small-Cap ETF
iShares MSCI Intl Momentum Factor ETF
iShares MSCI Intl Multifactor ETF
iShares MSCI Intl Quality Factor ETF
iShares MSCI Intl Size Factor ETF
iShares MSCI Intl Small-Cap Multifactor ETF
iShares MSCI Intl Value Factor ETF
iShares MSCI USA Mid-Cap Multifactor ETF
iShares MSCI USA Min Vol Factor ETF
iShares MSCI USA Momentum Factor ETF
iShares MSCI USA Multifactor ETF
iShares MSCI USA Quality Factor ETF
iShares MSCI USA Size Factor ETF
iShares MSCI USA Small-Cap Min Vol Factor ETF
iShares MSCI USA Small-Cap Multifactor ETF
iShares MSCI USA Value Factor ETF
iShares U.S. Tech Breakthrough Multisector ETF

Supplement to the Summary Prospectus, Prospectus and Statement
of Additional Information each dated as of December 30, 2021:
iShares Core MSCI Emerging Markets ETF
iShares Currency Hedged MSCI Canada ETF
iShares Currency Hedged MSCI Emerging Markets ETF
iShares Currency Hedged MSCI Eurozone ETF
iShares Currency Hedged MSCI Germany ETF
iShares Currency Hedged MSCI Japan ETF
iShares Currency Hedged MSCI United Kingdom ETF
iShares ESG Advanced MSCI EAFE ETF
iShares ESG Advanced MSCI EM ETF
iShares ESG Advanced MSCI USA ETF
iShares ESG Aware MSCI EAFE ETF
iShares ESG Aware MSCI EM ETF
iShares ESG Aware MSCI USA ETF
iShares ESG Aware MSCI USA Small-Cap ETF
iShares ESG MSCI EM Leaders ETF
iShares ESG MSCI USA Leaders ETF
iShares MSCI Argentina and Global Exposure ETF
iShares MSCI Australia ETF
iShares MSCI Austria ETF
iShares MSCI Belgium ETF
iShares MSCI Brazil ETF
iShares MSCI Brazil Small-Cap ETF
iShares MSCI BRIC ETF
iShares MSCI Canada ETF
iShares MSCI Chile ETF
iShares MSCI China ETF
iShares MSCI China Small-Cap ETF
iShares MSCI Colombia ETF
iShares MSCI Denmark ETF
iShares MSCI Emerging Markets Asia ETF
iShares MSCI Emerging Markets ETF
iShares MSCI Emerging Markets ex China ETF
iShares MSCI Emerging Markets Min Vol Factor ETF
iShares MSCI Emerging Markets Multifactor ETF
iShares MSCI Emerging Markets Small-Cap ETF
iShares MSCI Eurozone ETF
iShares MSCI Finland ETF
iShares MSCI France ETF
iShares MSCI Frontier and Select EM ETF
iShares MSCI Germany ETF
iShares MSCI Germany Small-Cap ETF
iShares MSCI Global Agriculture Producers ETF
iShares MSCI Global Energy Producers ETF
iShares MSCI Global Gold Miners ETF
iShares MSCI Global Metals & Mining Producers ETF
iShares MSCI Global Min Vol Factor ETF
iShares MSCI Global Silver and Metals Miners ETF
iShares MSCI Global Sustainable Development Goals ETF
iShares MSCI Hong Kong ETF
iShares MSCI India ETF
iShares MSCI India Small-Cap ETF
iShares MSCI Indonesia ETF
iShares MSCI Ireland ETF
iShares MSCI Israel ETF
iShares MSCI Italy ETF
iShares MSCI Japan Equal Weighted ETF
iShares MSCI Japan ETF
iShares MSCI Japan Small-Cap ETF
iShares MSCI Japan Value ETF
iShares MSCI Kuwait ETF
iShares MSCI Malaysia ETF
iShares MSCI Mexico ETF
iShares MSCI Netherlands ETF
iShares MSCI New Zealand ETF
iShares MSCI Norway ETF
iShares MSCI Pacific ex Japan ETF
iShares MSCI Peru ETF
iShares MSCI Philippines ETF
iShares MSCI Poland ETF
iShares MSCI Qatar ETF
iShares MSCI Russia ETF
iShares MSCI Saudi Arabia ETF
iShares MSCI Singapore ETF
iShares MSCI South Africa ETF
iShares MSCI South Korea ETF
iShares MSCI Spain ETF
iShares MSCI Sweden ETF
iShares MSCI Switzerland ETF
iShares MSCI Taiwan ETF
iShares MSCI Thailand ETF
iShares MSCI Turkey ETF
iShares MSCI UAE ETF
iShares MSCI United Kingdom ETF
iShares MSCI United Kingdom Small-Cap ETF
iShares MSCI USA Equal Weighted ETF
iShares MSCI World ETF

Supplement to the Prospectus and the Statement of Additional
Information both dated as of December 20, 2021:
iShares MSCI China Multisector Tech ETF

Supplement to the Prospectus and the Statement of Additional
Information both dated as of December 22, 2021:
iShares Paris-Aligned Climate MSCI USA ETF
If you have any questions, please call 1-800-iShares (1-800-474-2737).

iShares® is a registered trademark of BlackRock Fund Advisors and its affiliates.
                                                                            IS-A-PM-0122

                       PLEASE RETAIN THIS SUPPLEMENT
                           FOR FUTURE REFERENCE
Table of Contents
IMPORTANT NOTICE REGARDING CHANGE IN
           INVESTMENT POLICY

                         iShares®
                            iShares Trust
     Supplement dated September 1, 2021 (the “Supplement”)
            to the Summary Prospectus and Prospectus
                   each dated September 1, 2021
      for the iShares U.S. Technology ETF (IYW) (the “Fund”)
The information in this Supplement updates information in, and
should be read in conjunction with, the Summary Prospectus and
Prospectus for the Fund.
Change in the Fund’s Underlying Index
Prior to September 20, 2021, the Fund’s Underlying Index is Dow
Jones U.S. Technology Capped Index
Change in the Fund’s “Principal Investment Strategies”
Prior to September 20, 2021, the first paragraph of the section of the
Summary Prospectus and Prospectus entitled “Principal Investment
Strategies” for The Fund is the following, instead of the current first
four paragraphs:
The Fund seeks to track the investment results of the Dow Jones U.S.
Technology Capped Index (the “Underlying Index”), which is designed
to measure the performance of U.S. companies in the technology
industry. The Underlying Index uses a capping methodology to limit the
weight of the securities of any single company (as determined by S&P
Dow Jones Indices LLC (the “Index Provider” or “SPDJI”)) to a maximum
of 22.5% of the Underlying Index. Additionally, the capping
methodology limits the sum of the weights of the securities of all
issuers that individually constitute more than 5% of the weight of the
Underlying Index to a maximum of 50% of the weight of the Underlying
Index in the aggregate. In order to implement this capping
methodology, the Underlying Index constrains at quarterly rebalance:
(i) the weight of any single issuer to a maximum of 22.50%, and (ii) the
aggregate weight of all issuers that individually exceed 4.50% of the
index weight to a maximum of 45%. In implementing this capping
methodology, SPDJI may consider two or more companies as belonging
to the same issuer where there is reasonable evidence of common
control. The Underlying Index includes large-, mid- and small-
capitalization companies and may change over time. As of April 30,
2020, a significant portion of the Underlying Index is represented by
securities of companies in the technology industry or sector. The
components of the Underlying Index are likely to change over time.
Prior to September 20, 2021, the last paragraph of the section of the
Summary Prospectus and Prospectus entitled “Principal Investment
Strategies” for the Fund is the following, instead of the current last
paragraph of the section:
The Underlying Index is sponsored by SPDJI, which is independent of
the Fund and BFA. The Index Provider determines the composition and
relative weightings of the securities in the Underlying Index and
publishes information regarding the market value of the Underlying
Index.
Changes to the “Average Annual Returns” table
Prior to September 20, 2021, references to the “Russell 1000
Technology RIC 22.5/45 Capped Index,” each footnote “3” call and
footnote “3” in the “Average Annual Total Returns” table on page S-8 of
the Summary Prospectus and Prospectus are deleted.
Changes to “More Information About the Fund”
Prior to September 20, 2021, the second paragraph in the section of the
Prospectus entitled “More Information About the Fund” is deleted in its
entirety.
Change in the Fund’s “Index Provider”
Prior to September 20, 2021, the section entitled “Index Provider” on
page 27 of the Prospectus of the Fund is the following, instead of the
current two paragraphs:
SPDJI is the Index Provider for the Underlying Index and is not affiliated
with the Trust, BFA, State Street, the Distributor or any of their
respective affiliates.
SPDJI is a resource for index-based concepts, data and research. SPDJI
provides financial, economic and investment information and analytical
services to the financial community. SPDJI calculates and maintains the
S&P Global 1200, which includes the S&P 500® for the U.S., the S&P
Europe 350 for Continental Europe, Ireland and the U.K., the S&P/TOPIX
150 for Japan, the S&P Asia 50, the S&P/TSX 60TM for Canada, the S&P/
ASX 50 and the S&P Latin America 40. SPDJI also publishes the S&P
MidCap 400®, S&P SmallCap 600®, S&P Total Market Index and S&P
U.S. REIT for the U.S. SPDJI calculates and maintains the S&P Global
Broad Market Index (BMI) Series, a set of rules-based equity
benchmarks covering developed and emerging countries around the
world. Company additions to and deletions from an S&P equity index do
not in any way reflect an opinion on the investment merits of the
company.
BFA or its affiliates have entered into a license agreement with SPDJI to
use the Underlying Index. BFA or its affiliates sublicense rights in the
Underlying Index to the Trust at no charge.
Change in the Fund’s Disclaimers
Prior to September 20, 2021, the paragraph at the bottom of page i
of the Prospectus of the Fund is the following, instead of the current
paragraph:
The “Dow Jones U.S. Technology Capped IndexTM” is a product of S&P
Dow Jones Indices LLC (“SPDJI”), and has been licensed for use by
BlackRock Fund Advisors or its affiliates. Standard & Poor’s® and S&P®
are registered trademarks of Standard & Poor’s Financial Services LLC
(“S&P”); Dow Jones® is a registered trademark of Dow Jones Trademark
Holdings LLC (“Dow Jones”); iShares® and BlackRock® are registered
trademarks of BlackRock Fund Advisors and its affiliates, and these
trademarks have been licensed for use by SPDJI and sublicensed for
certain purposes by iShares Trust. The Fund is not sponsored, endorsed,
sold or promoted by SPDJI, Dow Jones, S&P or their respective affiliates,
and none of such parties makes any representation regarding the
advisability of investing in such product(s), nor do they have any liability
for any errors, omissions, or interruptions of the Dow Jones U.S.
Technology Capped Index.
Prior to September 20, 2021, the section entitled “Disclaimers” on
page 27 of the Prospectus for the Fund is the following, instead of
the current five paragraphs:
The Underlying Index is a product of SPDJI, and has been licensed for
use by BFA or its affiliates. Standard & Poor’s® and S&P® are
registered trademarks of Standard & Poor’s Financial Services LLC, a
division of S&P Global (“S&P”); Dow Jones® is a registered trademark
of Dow Jones Trademark Holdings LLC (“Dow Jones”); iShares® and
BlackRock® are registered trademarks of BFA and its affiliates; and
these trademarks have been licensed for use by SPDJI and
sublicensed for certain purposes by the Trust. The Fund is not
sponsored, endorsed, sold or promoted by SPDJI, Dow Jones, S&P, or
any of their respective affiliates (collectively, “S&P Dow Jones
Indices”). S&P Dow Jones Indices make no representation or
warranty, express or implied, to the owners of shares of the Fund or
any member of the public regarding the advisability of investing in
securities generally or in the Fund in particular or the ability of the
Underlying Index to track general market performance. S&P Dow
Jones Indices’ only relationship to the Trust and BFA and their
affiliates with respect to the Underlying Index is the licensing of the
Underlying Index and certain trademarks, service marks and/or
trade names of S&P Dow Jones Indices and/or its third party
licensors. The Underlying Index is determined, composed and
calculated by S&P Dow Jones Indices without regard to the Trust,
BFA or its affiliates or the Fund. S&P Dow Jones Indices have no
obligation to take the needs of BFA or its affiliates or the owners of
shares of the Fund into consideration in determining, composing or
calculating the Underlying Index. S&P Dow Jones Indices are not
responsible for and have not participated in the determination of the
prices, and amount of shares of the Fund or the timing of the
issuance or sale of such shares or in the determination or calculation
of the equation by which shares of the Fund are to be converted into
cash, surrendered or redeemed, as the case may be. S&P Dow Jones
Indices have no obligation or liability in connection with the
administration, marketing or trading of shares of the Fund. There is
no assurance that investment products based on the Underlying
Index will accurately track index performance or provide positive
investment returns. SPDJI is not an investment adviser. Inclusion of a
security within an index is not a recommendation by S&P Dow Jones
Indices to buy, sell, or hold such security, nor is it considered to be
investment advice.
S&P DOW JONES INDICES DO NOT GUARANTEE THE ADEQUACY,
ACCURACY, TIMELINESS AND/OR THE COMPLETENESS OF THE
UNDERLYING INDEX OR ANY DATA RELATED THERETO OR ANY
COMMUNICATION, INCLUDING BUT NOT LIMITED TO, ORAL OR
WRITTEN COMMUNICATION (INCLUDING ELECTRONIC
COMMUNICATIONS) WITH RESPECT THERETO. S&P DOW JONES
INDICES SHALL NOT BE SUBJECT TO ANY DAMAGES OR LIABILITY
FOR ANY ERRORS, OMISSIONS, OR DELAYS THEREIN. S&P DOW
JONES INDICES MAKE NO EXPRESS OR IMPLIED WARRANTIES, AND
EXPRESSLY DISCLAIM ALL WARRANTIES, OF MERCHANTABILITY OR
FITNESS FOR A PARTICULAR PURPOSE OR USE OR AS TO RESULTS
TO BE OBTAINED BY BFA OR ITS AFFILIATES, OWNERS OF SHARES
OF THE FUND, OR ANY OTHER PERSON OR ENTITY FROM THE USE OF
THE UNDERLYING INDEX OR WITH RESPECT TO ANY DATA RELATED
THERETO. WITHOUT LIMITING ANY OF THE FOREGOING, IN NO
EVENT WHATSOEVER SHALL S&P DOW JONES INDICES BE LIABLE
FOR ANY INDIRECT, SPECIAL, INCIDENTAL, PUNITIVE, OR
CONSEQUENTIAL DAMAGES INCLUDING, BUT NOT LIMITED TO,
LOSS OF PROFITS, TRADING LOSSES, LOST TIME OR GOODWILL,
EVEN IF THEY HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH
DAMAGES, WHETHER IN CONTRACT, TORT, STRICT LIABILITY, OR
OTHERWISE. THERE ARE NO THIRD PARTY BENEFICIARIES OF ANY
AGREEMENTS OR ARRANGEMENTS BETWEEN S&P DOW JONES
INDICES AND BFA OR ITS AFFILIATES, OTHER THAN THE LICENSORS
OF S&P DOW JONES INDICES.
Shares of the Fund are not sponsored, endorsed or promoted by
NYSE Arca. NYSE Arca makes no representation or warranty, express
or implied, to the owners of shares of the Fund or any member of the
public regarding the ability of the Fund to track the total return
performance of the Underlying Index or the ability of the Underlying
Index to track stock market performance. NYSE Arca is not
responsible for, nor has it participated in, the determination of the
compilation or the calculation of the Underlying Index, nor in the
determination of the timing of, prices of, or quantities of shares of
the Fund to be issued, nor in the determination or calculation of the
equation by which the shares are redeemable. NYSE Arca has no
obligation or liability to owners of shares of the Fund in connection
with the administration, marketing or trading of shares of the Fund.
NYSE Arca does not guarantee the accuracy and/or the
completeness of the Underlying Index or any data included therein.
NYSE Arca makes no warranty, express or implied, as to results to be
obtained by the Trust on behalf of the Fund as licensee, licensee’s
customers and counterparties, owners of shares of the Fund, or any
other person or entity from the use of the Underlying Index or any
data included therein in connection with the rights licensed as
described herein or for any other use. NYSE Arca makes no express
or implied warranties and hereby expressly disclaims all warranties
of merchantability or fitness for a particular purpose with respect to
the Underlying Index or any data included therein. Without limiting
any of the foregoing, in no event shall NYSE Arca have any liability
for any direct, indirect, special, punitive, consequential or any other
damages (including lost profits) even if notified of the possibility of
such damages.
If you have any questions, please call 1-800-iShares (1-800-474-2737).
iShares® is a registered trademark of BlackRock Fund Advisors and its affiliates.
                                                                           IS-A-IYW-0921

                       PLEASE RETAIN THIS SUPPLEMENT
                           FOR FUTURE REFERENCE
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        Table of Contents
                        Fund Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .              S-1
                        More Information About the Fund . . . . . . . . .                                             1
                        A Further Discussion of Principal Risks . .                                                   2
                        A Further Discussion of Other Risks . . . . . .                                             11
                        Portfolio Holdings Information . . . . . . . . . . . . .                                    12
                        Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .              12
                        Shareholder Information . . . . . . . . . . . . . . . . . . . .                             16
                        Distribution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .        25
                        Financial Highlights . . . . . . . . . . . . . . . . . . . . . . . . . .                    26
                        Index Provider . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .            27
                        Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .         27

        “Russell” and “Russell 1000® Index” are registered trademarks of FTSE Russell and have been licensed for use
        for certain purposes by BlackRock Fund Advisors or its affiliates. All rights in the Russell 1000 Technology RIC
        22.5/45 Capped Index and the Russell 1000 Index (including any subset or parent index thereof) vest in the
        London Stock Exchange Group Plc and its group undertakings (collectively, the “LSE Group”), which owns the
        Indexes. “FTSE®”, “Russell®” and “FTSE Russell®” are trade marks of the relevant LSE Group company and
        are used by any other LSE Group company under license. iShares® and BlackRock® are registered
        trademarks of BlackRock Fund Advisors and its affiliates.

                                                               i
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                        iSHARES® U.S. TECHNOLOGY ETF
                         Ticker: IYW                   Stock Exchange: NYSE Arca

        Investment Objective
        The iShares U.S. Technology ETF (the “Fund”) seeks to track the investment results of
        an index composed of U.S. equities in the technology sector.

        Fees and Expenses
        The following table describes the fees and expenses that you will incur if you buy, hold
        and sell shares of the Fund. The investment advisory agreement between iShares Trust
        (the “Trust”) and BlackRock Fund Advisors (“BFA”) (the “Investment Advisory
        Agreement”) provides that BFA will pay all operating expenses of the Fund, except the
        management fees, interest expenses, taxes, expenses incurred with respect to the
        acquisition and disposition of portfolio securities and the execution of portfolio
        transactions, including brokerage commissions, distribution fees or expenses, litigation
        expenses and any extraordinary expenses.
        You may pay other fees, such as brokerage commissions and other fees to
        financial intermediaries, which are not reflected in the tables and examples
        below.
                                       Annual Fund Operating Expenses
                                (ongoing expenses that you pay each year as a
                                 percentage of the value of your investments)
                                                                                   Total Annual
                                    Distribution and                                   Fund
          Management                Service (12b-1)              Other              Operating
             Fees                         Fees                 Expenses1            Expenses
                0.41%                        None                0.00%                0.41%

          1
              The amount rounded to 0.00%.
        Example. This Example is intended to help you compare the cost of owning shares of
        the Fund with the cost of investing in other funds. The Example assumes that you
        invest $10,000 in the Fund for the time periods indicated and then sell all of your
        shares at the end of those periods. The Example also assumes that your investment
        has a 5% return each year and that the Fund’s operating expenses remain the same.
        Although your actual costs may be higher or lower, based on these assumptions, your
        costs would be:

        1 Year                      3 Years                    5 Years                  10 Years

         $42                          $132                      $230                     $518

                                                       S-1
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        Portfolio Turnover. The Fund may pay               Underlying Index may exceed these
        transaction costs, such as commissions,            constraints due to fluctuations in
        when it buys and sells securities (or              market value, corporate actions, or
        “turns over” its portfolio). A higher              other events that change the index
        portfolio turnover rate may indicate               composition between quarterly
        higher transaction costs and may result            rebalance dates.
        in higher taxes when Fund shares are
                                                           Substantially all of the Underlying
        held in a taxable account. These costs,
                                                           Index is expected to be represented by
        which are not reflected in the Annual
                                                           securities of companies in the
        Fund Operating Expenses or in the
                                                           technology industry or sector. The
        Example, affect the Fund’s
                                                           components of the Underlying Index are
        performance. During the most recent
                                                           likely to change over time.
        fiscal year, the Fund’s portfolio turnover
        rate was 12% of the average value of its           BFA uses a “passive” or indexing
        portfolio.                                         approach to try to achieve the Fund’s
                                                           investment objective. Unlike many
        Principal Investment                               investment companies, the Fund does
        Strategies                                         not try to “beat” the index it tracks and
        The Fund seeks to track the investment             does not seek temporary defensive
        results of the Russell 1000 Technology             positions when markets decline or
        RIC 22.5/45 Capped Index (the                      appear overvalued.
        “Underlying Index”), which measures
                                                           Indexing may eliminate the chance that
        the performance of the technology
                                                           the Fund will substantially outperform
        sector of the U.S. equity market, as
                                                           the Underlying Index but also may
        defined by FTSE Russell (the “Index
                                                           reduce some of the risks of active
        Provider” or “Russell”). The Underlying
                                                           management, such as poor security
        Index includes large- and mid-
                                                           selection. Indexing seeks to achieve
        capitalization companies.
                                                           lower costs and better after-tax
        The Underlying Index is a subset of the            performance by aiming to keep portfolio
        Russell 1000 Index, which is a float-              turnover low in comparison to actively
        adjusted capitalization-weighted index             managed investment companies.
        of equity securities issued by
        approximately the 1,000 largest issuers            BFA uses a representative sampling
        in the Russell 3000 Index. The Russell             indexing strategy to manage the Fund.
        3000 Index measures the performance                “Representative sampling” is an
        of the broad U.S. equity market, as                indexing strategy that involves investing
        defined by Russell.                                in a representative sample of securities
        The Underlying Index uses a capping                that collectively has an investment
        methodology to constrain at quarterly              profile similar to that of an applicable
        rebalance: (i) the weights of any single           underlying index. The securities
        issuer (as determined by Russell) to a             selected are expected to have, in the
        maximum of 22.5%, and (ii) the                     aggregate, investment characteristics
        aggregate weight of all issuers that               (based on factors such as market
        individually exceed 4.5% of the index              capitalization and industry weightings),
        weight to a maximum of 45%. The                    fundamental characteristics (such as
        weight of one or more securities in the

                                                     S-2
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        return variability and yield) and liquidity          (i.e., hold 25% or more of its total
        measures similar to those of an                      assets) in a particular industry or group
        applicable underlying index. The Fund                of industries to approximately the same
        may or may not hold all of the securities            extent that the Underlying Index is
        in the Underlying Index.                             concentrated. For purposes of this
        The Fund generally will invest at least              limitation, securities of the U.S.
        80% of its assets in the component                   government (including its agencies and
        securities of its Underlying Index and in            instrumentalities) and repurchase
        investments that have economic                       agreements collateralized by U.S.
        characteristics that are substantially               government securities are not
        identical to the component securities of             considered to be issued by members of
        its Underlying Index (i.e., depositary               any industry.
        receipts representing securities of the              Summary of Principal Risks
        Underlying Index) and may invest up to
        20% of its assets in certain futures,                As with any investment, you could lose
        options and swap contracts, cash and                 all or part of your investment in the
        cash equivalents, including shares of                Fund, and the Fund’s performance could
        money market funds advised by BFA or                 trail that of other investments. The Fund
        its affiliates, as well as in securities not         is subject to certain risks, including the
        included in the Underlying Index, but                principal risks noted below, any of
        which BFA believes will help the Fund                which may adversely affect the Fund’s
        track the Underlying Index. Cash and                 net asset value per share (“NAV”),
        cash equivalent investments associated               trading price, yield, total return and
        with a derivative position will be treated           ability to meet its investment objective.
        as part of that position for the purposes            The order of the below risk factors does
        of calculating investments not included              not indicate the significance of any
        in the Underlying Index. The Fund seeks              particular risk factor.
        to track the investment results of the               Asset Class Risk. Securities and other
        Underlying Index before fees and                     assets in the Underlying Index or in the
        expenses of the Fund.                                Fund’s portfolio may underperform in
        The Fund may lend securities                         comparison to the general financial
        representing up to one-third of the value            markets, a particular financial market or
        of the Fund’s total assets (including the            other asset classes.
        value of any collateral received).                   Authorized Participant Concentration
        The Underlying Index is sponsored by                 Risk. Only an Authorized Participant (as
        Russell, which is part of the London                 defined in the Creations and
        Stock Exchange Group and is                          Redemptions section of this prospectus
        independent of the Fund and BFA. The                 (the “Prospectus”)) may engage in
        Index Provider determines the                        creation or redemption transactions
        composition and relative weightings of               directly with the Fund, and none of
        the securities in the Underlying Index               those Authorized Participants is
        and publishes information regarding the              obligated to engage in creation and/or
        market value of the Underlying Index.                redemption transactions. The Fund has
                                                             a limited number of institutions that
        Industry Concentration Policy. The                   may act as Authorized Participants on
        Fund will concentrate its investments                an agency basis (i.e., on behalf of other

                                                       S-3
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        market participants). To the extent that           Equity Securities Risk. Equity
        Authorized Participants exit the                   securities are subject to changes in
        business or are unable to proceed with             value, and their values may be more
        creation or redemption orders with                 volatile than those of other asset
        respect to the Fund and no other                   classes. The Underlying Index is
        Authorized Participant is able to step             composed of common stocks, which
        forward to create or redeem, Fund                  generally subject their holders to more
        shares may be more likely to trade at a            risks than preferred stocks and debt
        premium or discount to NAV and                     securities because common
        possibly face trading halts or delisting.          stockholders’ claims are subordinated
        Concentration Risk. The Fund may be                to those of holders of preferred stocks
        susceptible to an increased risk of loss,          and debt securities upon the bankruptcy
        including losses due to adverse events             of the issuer.
        that affect the Fund’s investments more            Index-Related Risk. There is no
        than the market as a whole, to the                 guarantee that the Fund’s investment
        extent that the Fund’s investments are             results will have a high degree of
        concentrated in the securities and/or              correlation to those of the Underlying
        other assets of a particular issuer or             Index or that the Fund will achieve its
        issuers, country, group of countries,              investment objective. Market
        region, market, industry, group of                 disruptions and regulatory restrictions
        industries, sector, market segment or              could have an adverse effect on the
        asset class.                                       Fund’s ability to adjust its exposure to
        Cybersecurity Risk. Failures or                    the required levels in order to track the
        breaches of the electronic systems of              Underlying Index. Errors in index data,
        the Fund, the Fund’s adviser, distributor,         index computations or the construction
        the Index Provider and other service               of the Underlying Index in accordance
        providers, market makers, Authorized               with its methodology may occur from
        Participants or the issuers of securities          time to time and may not be identified
        in which the Fund invests have the                 and corrected by the Index Provider for
        ability to cause disruptions, negatively           a period of time or at all, which may
        impact the Fund’s business operations              have an adverse impact on the Fund and
        and/or potentially result in financial             its shareholders. Unusual market
        losses to the Fund and its shareholders.           conditions may cause the Index
        While the Fund has established business            Provider to postpone a scheduled
        continuity plans and risk management               rebalance, which could cause the
        systems seeking to address system                  Underlying Index to vary from its normal
        breaches or failures, there are inherent           or expected composition.
        limitations in such plans and systems.             Infectious Illness Risk. An outbreak of
        Furthermore, the Fund cannot control               an infectious respiratory illness, COVID-
        the cybersecurity plans and systems of             19, caused by a novel coronavirus has
        the Fund’s Index Provider and other                resulted in travel restrictions, disruption
        service providers, market makers,                  of healthcare systems, prolonged
        Authorized Participants or issuers of              quarantines, cancellations, supply chain
        securities in which the Fund invests.              disruptions, lower consumer demand,
                                                           layoffs, ratings downgrades, defaults
                                                           and other significant economic impacts.

                                                     S-4
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        Certain markets have experienced                   compared with smaller capitalization
        temporary closures, extreme volatility,            companies. During different market
        severe losses, reduced liquidity and               cycles, the performance of large-
        increased trading costs. These events              capitalization companies has trailed the
        will have an impact on the Fund and its            overall performance of the broader
        investments and could impact the                   securities markets.
        Fund’s ability to purchase or sell                 Management Risk. As the Fund will not
        securities or cause elevated tracking              fully replicate the Underlying Index, it is
        error and increased premiums or                    subject to the risk that BFA’s
        discounts to the Fund’s NAV. Other                 investment strategy may not produce
        infectious illness outbreaks in the future         the intended results.
        may result in similar impacts.
                                                           Market Risk. The Fund could lose
        Information Technology Sector Risk.                money over short periods due to short-
        Information technology companies face              term market movements and over
        intense competition and potentially                longer periods during more prolonged
        rapid product obsolescence. They are               market downturns. Local, regional or
        also heavily dependent on intellectual             global events such as war, acts of
        property rights and may be adversely               terrorism, the spread of infectious
        affected by the loss or impairment of              illness or other public health issues,
        those rights. Companies in the                     recessions, or other events could have a
        information technology sector are                  significant impact on the Fund and its
        facing increased government and                    investments and could result in
        regulatory scrutiny and may be subject             increased premiums or discounts to the
        to adverse government or regulatory                Fund’s NAV.
        action. Companies in the software
        industry may be adversely affected by,             Market Trading Risk. The Fund faces
        among other things, the decline or                 numerous market trading risks,
        fluctuation of subscription renewal rates          including the potential lack of an active
        for their products and services and                market for Fund shares, losses from
        actual or perceived vulnerabilities in             trading in secondary markets, periods of
        their products or services.                        high volatility and disruptions in the
                                                           creation/redemption process. ANY OF
        Issuer Risk. The performance of the                THESE FACTORS, AMONG OTHERS,
        Fund depends on the performance of                 MAY LEAD TO THE FUND’S SHARES
        individual securities to which the Fund            TRADING AT A PREMIUM OR DISCOUNT
        has exposure. Changes in the financial             TO NAV.
        condition or credit rating of an issuer of
        those securities may cause the value of            Non-Diversification Risk. The Fund
        the securities to decline.                         may invest a large percentage of its
                                                           assets in securities issued by or
        Large-Capitalization Companies Risk.               representing a small number of issuers.
        Large-capitalization companies may be              As a result, the Fund’s performance may
        less able than smaller capitalization              depend on the performance of a small
        companies to adapt to changing market              number of issuers.
        conditions. Large-capitalization
        companies may be more mature and                   Operational Risk. The Fund is exposed
        subject to more limited growth potential           to operational risks arising from a
                                                           number of factors, including, but not

                                                     S-5
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        limited to, human error, processing and           adversely affected by the loss or
        communication errors, errors of the               impairment of those rights. Companies
        Fund’s service providers, counterparties          in the technology sector are facing
        or other third parties, failed or                 increased government and regulatory
        inadequate processes and technology               scrutiny and may be subject to adverse
        or systems failures. The Fund and BFA             government or regulatory action.
        seek to reduce these operational risks            Telecommunications Sector Risk.
        through controls and procedures.                  Companies in the telecommunications
        However, these measures do not                    sector may be affected by industry
        address every possible risk and may be            competition, substantial capital
        inadequate to address significant                 requirements, government regulation
        operational risks.                                and obsolescence of
        Passive Investment Risk. The Fund is              telecommunications products and
        not actively managed, and BFA generally           services due to technological
        does not attempt to take defensive                advancement.
        positions under any market conditions,            Tracking Error Risk. The Fund may be
        including declining markets.                      subject to tracking error, which is the
        Risk of Investing in the U.S. Certain             divergence of the Fund’s performance
        changes in the U.S. economy, such as              from that of the Underlying Index.
        when the U.S. economy weakens or                  Tracking error may occur because of
        when its financial markets decline, may           differences between the securities and
        have an adverse effect on the securities          other instruments held in the Fund’s
        to which the Fund has exposure.                   portfolio and those included in the
        Securities Lending Risk. The Fund may             Underlying Index, pricing differences,
        engage in securities lending. Securities          transaction costs incurred by the Fund,
        lending involves the risk that the Fund           the Fund’s holding of uninvested cash,
        may lose money because the borrower               differences in timing of the accrual of or
        of the loaned securities fails to return          the valuation of dividends or interest,
        the securities in a timely manner or at           the requirements to maintain pass-
        all. The Fund could also lose money in            through tax treatment, portfolio
        the event of a decline in the value of            transactions carried out to minimize the
        collateral provided for loaned securities         distribution of capital gains to
        or a decline in the value of any                  shareholders, acceptance of custom
        investments made with cash collateral.            baskets, changes to the Underlying
        These events could also trigger adverse           Index or the costs to the Fund of
        tax consequences for the Fund.                    complying with various new or existing
                                                          regulatory requirements. This risk may
        Technology Sector Risk. Technology                be heightened during times of increased
        companies, may have limited product               market volatility or other unusual
        lines, markets, financial resources or            market conditions. Tracking error also
        personnel. Technology companies                   may result because the Fund incurs fees
        typically face intense competition and            and expenses, while the Underlying
        potentially rapid product obsolescence.           Index does not.
        They are also heavily dependent on
        intellectual property rights and may be

                                                    S-6
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        Performance Information
        The bar chart and table that follow show how the Fund has performed on a calendar
        year basis and provide an indication of the risks of investing in the Fund. Both assume
        that all dividends and distributions have been reinvested in the Fund. Past performance
        (before and after taxes) does not necessarily indicate how the Fund will perform in the
        future.
                            Year by Year Returns1 (Years Ended December 31)

                        60%
                                                                                                      46.92% 47.52%
                        45%                                                         36.58%

                        30%                      26.48%
                                                          19.49%
                                        11.78%                             13.69%
                        15%
                                                                   3.66%
                         0%
                               -0.13%                                                        -0.96%
                        -15%

                               2011 2012 2013 2014 2015 2016 2017 2018 2019 2020

          1
              The Fund’s year-to-date return as of June 30, 2021 was 16.93%.
        The best calendar quarter return during the periods shown above was 32.14% in the
        2nd quarter of 2020; the worst was -17.46% in the 4th quarter of 2018.
        Updated performance information, including the Fund’s current NAV, may be obtained
        by visiting our website at www.iShares.com or by calling 1-800-iShares (1-800-474-
        2737) (toll free).

                                                                    S-7
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                                       Average Annual Total Returns
                                (for the periods ended December 31, 2020)
                                                                        One Year    Five Years     Ten Years
        (Inception Date: 5/15/2000)
           Return Before Taxes                                           47.52%       27.22%        19.28%
           Return After Taxes on Distributions1                          47.25%       26.95%        19.02%
           Return After Taxes on Distributions and Sale of Fund
           Shares1                                                       28.22%       22.54%        16.54%
        Dow Jones U.S. Technology Capped Index2,3 (Index
        returns do not reflect deductions for fees, expenses, or
        taxes)                                                           48.14%       27.79%        19.76%
        Russell 1000 Technology RIC 22.5/45 Capped Index3
        (Index returns do not reflect deductions for fees,
        expenses, or taxes)                                                N/A          N/A           N/A

             1
                 After-tax returns in the table above are calculated using the historical highest individual
                 U.S. federal marginal income tax rates and do not reflect the impact of state or local taxes.
                 Actual after-tax returns depend on an investor’s tax situation and may differ from those
                 shown, and after-tax returns shown are not relevant to tax-exempt investors or investors
                 who hold shares through tax-deferred arrangements, such as 401(k) plans or individual
                 retirement accounts (“IRAs”). Fund returns after taxes on distributions and sales of Fund
                 shares are calculated assuming that an investor has sufficient capital gains of the same
                 character from other investments to offset any capital losses from the sale of Fund shares.
                 As a result, Fund returns after taxes on distributions and sales of Fund shares may exceed
                 Fund returns before taxes and/or returns after taxes on distributions.
             2
                 Index returns through June 23, 2019, reflect the performance of the Dow Jones U.S.
                 Technology Index. Index returns beginning on June 24, 2019 reflect the performance of the
                 Dow Jones U.S. Technology Capped Index.
             3
                 Effective September 20, 2021, the Fund’s Underlying Index is the Russell 1000 Technology
                 RIC 22.5/45 Capped Index. Prior to September 20, 2021, the Fund’s Underlying Index is
                 the Dow Jones U.S. Technology Capped Index. The inception date of the Russell 1000
                 Technology RIC 22.5/45 Capped Index was July 9, 2021.

                                                          S-8
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        Management                                       Tax Information
        Investment Adviser. BlackRock Fund               The Fund intends to make distributions
        Advisors.                                        that may be taxable to you as ordinary
        Portfolio Managers. Jennifer Hsui, Alan          income or capital gains, unless you are
        Mason, Greg Savage and Amy Whitelaw              investing through a tax-deferred
        (the “Portfolio Managers”) are primarily         arrangement such as a 401(k) plan or
        responsible for the day-to-day                   an IRA, in which case, your distributions
        management of the Fund. Each Portfolio           generally will be taxed when withdrawn.
        Manager supervises a portfolio                   Payments to Broker-Dealers
        management team. Ms. Hsui, Mr.
        Mason, Mr. Savage and Ms. Whitelaw
                                                         and Other Financial
        have been Portfolio Managers of the              Intermediaries
        Fund since 2012, 2016, 2008 and                  If you purchase shares of the Fund
        2018, respectively.                              through a broker-dealer or other
                                                         financial intermediary (such as a bank),
        Purchase and Sale of Fund                        BFA or other related companies may
        Shares                                           pay the intermediary for marketing
        The Fund is an exchange-traded fund              activities and presentations, educational
        (commonly referred to as an “ETF”).              training programs, conferences, the
        Individual shares of the Fund may only           development of technology platforms
        be bought and sold in the secondary              and reporting systems or other services
        market through a broker-dealer.                  related to the sale or promotion of the
        Because ETF shares trade at market               Fund. These payments may create a
        prices rather than at NAV, shares may            conflict of interest by influencing the
        trade at a price greater than NAV (a             broker-dealer or other intermediary and
        premium) or less than NAV (a discount).          your salesperson to recommend the
        An investor may incur costs attributable         Fund over another investment. Ask your
        to the difference between the highest            salesperson or visit your financial
        price a buyer is willing to pay to               intermediary’s website for more
        purchase shares of the Fund (bid) and            information.
        the lowest price a seller is willing to
        accept for shares of the Fund (ask)
        when buying or selling shares in the
        secondary market (the “bid-ask
        spread”).

                                                   S-9
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        More Information About the Fund
        This Prospectus contains important information about investing in the Fund. Please
        read this Prospectus carefully before you make any investment decisions. Additional
        information regarding the Fund is available at www.iShares.com.
        Effective September 20, 2021, the Fund’s Underlying Index is the Russell 1000
        Technology RIC 22.5/45 Capped Index. Prior to September 20, 2021, the Fund’s
        Underlying Index is the Dow Jones U.S. Technology Capped Index.
        BFA is the investment adviser to the Fund. Shares of the Fund are listed for trading on
        NYSE Arca, Inc. (“NYSE Arca”). The market price for a share of the Fund may be
        different from the Fund’s most recent NAV.
        ETFs are funds that trade like other publicly-traded securities. The Fund is designed to
        track an index. Similar to shares of an index mutual fund, each share of the Fund
        represents an ownership interest in an underlying portfolio of securities and other
        instruments intended to track a market index. Unlike shares of a mutual fund, which
        can be bought and redeemed from the issuing fund by all shareholders at a price based
        on NAV, shares of the Fund may be purchased or redeemed directly from the Fund at
        NAV solely by Authorized Participants and only in aggregations of a specified number of
        shares (“Creation Units”). Also unlike shares of a mutual fund, shares of the Fund are
        listed on a national securities exchange and trade in the secondary market at market
        prices that change throughout the day.
        The Fund invests in a particular segment of the securities markets and seeks to track
        the performance of a securities index that is not representative of the market as a
        whole. The Fund is designed to be used as part of broader asset allocation strategies.
        Accordingly, an investment in the Fund should not constitute a complete investment
        program.
        An index is a financial calculation, based on a grouping of financial instruments, and is
        not an investment product, while the Fund is an actual investment portfolio. The
        performance of the Fund and the Underlying Index may vary for a number of reasons,
        including transaction costs, non-U.S. currency valuations, asset valuations, corporate
        actions (such as mergers and spin-offs), timing variances and differences between the
        Fund’s portfolio and the Underlying Index resulting from the Fund’s use of
        representative sampling or from legal restrictions (such as diversification
        requirements) that apply to the Fund but not to the Underlying Index. From time to
        time, the Index Provider may make changes to the methodology or other adjustments
        to the Underlying Index. Unless otherwise determined by BFA, any such change or
        adjustment will be reflected in the calculation of the Underlying Index performance on
        a going-forward basis after the effective date of such change or adjustment. Therefore,
        the Underlying Index performance shown for periods prior to the effective date of any
        such change or adjustment will generally not be recalculated or restated to reflect
        such change or adjustment.
        “Tracking error” is the divergence of the Fund’s performance from that of the
        Underlying Index. Because the Fund uses a representative sampling indexing strategy,

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