2021 Summary Prospectus - iShares

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JULY 30, 2021

    2021 Summary Prospectus
• iShares U.S. Telecommunications ETF | IYZ | CBOE BZX

Before you invest, you may want to review the Fund’s prospectus, which contains more
information about the Fund and its risks. You can find the Fund’s prospectus (including
amendments and supplements) and other information about the Fund, including the
Fund’s statement of additional information and shareholder reports, online at https://
www.ishares.com/prospectus. You can also get this information at no cost by calling 1-
800-iShares (1-800-474-2737) or by sending an e-mail request to
iSharesETFs@blackrock.com, or from your financial professional. The Fund’s prospectus
and statement of additional information, both dated July 30, 2021, as amended and
supplemented from time to time, are incorporated by reference into (legally made a part
of) this Summary Prospectus. Information on the Fund’s net asset value, market price,
premiums and discounts, and bid-ask spreads can be found at www.iShares.com.

The Securities and Exchange Commission has not approved or disapproved these
securities or passed upon the adequacy of this prospectus. Any representation to the
contrary is a criminal offense.
IMPORTANT NOTICE REGARDING CHANGE IN
                INVESTMENT POLICY

                          iShares®
                             iShares Trust
         Supplement dated July 30, 2021 (the “Supplement”)
               to the Summary Prospectus, Prospectus
         and Statement of Additional Information (the “SAI”),
                       each dated July 30, 2021,
   for the iShares U.S. Telecommunications ETF (IYZ) (the “Fund”)
The information in this Supplement updates information in, and
should be read in conjunction with, the Summary Prospectus,
Prospectus and SAI 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. Select Telecommunications 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” is the following, instead of the current first four
paragraphs of the section:
The Fund seeks to track the investment results of the Dow Jones U.S.
Select Telecommunications Index (the “Underlying Index”), which
measures the performance of the telecommunications sector of the U.S.
equity market, as defined by S&P Dow Jones Indices LLC (the “Index
Provider” or “SPDJI”). The Underlying Index may include large-, mid- or
small-capitalization companies. As of March 31, 2020, a significant
portion of the Underlying Index is represented by securities of
companies in the information technology and telecommunications
industries or sectors. 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” 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 Total Returns” table
Prior to September 20, 2021, references to the “Russell 1000
Telecommunications RIC 22.5/45 Capped Index,” each footnote “2”
reference and footnote “2” 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 to 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 for the Fund is the following, instead of the current
paragraph:
The Dow Jones U.S. Select Telecommunications IndexTM is a product of
S&P Dow Jones Indices LLC or its affiliates (“SPDJI”), and has been
licensed for use by BlackRock Fund Advisors (“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 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. Select Telecommunications Index.
Prior to September 20, 2021, the section entitled “Disclaimers” on
pages 27-28 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
Cboe BZX. Cboe BZX 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. Cboe BZX 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. Cboe BZX 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.
Cboe BZX does not guarantee the accuracy and/or the completeness
of the Underlying Index or any data included therein. Cboe BZX
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. Cboe BZX 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 Cboe BZX 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.
Change in the Fund’s “Construction and Maintenance of the
Underlying Indexes”
Prior to September 20, 2021, the first paragraph of the section
entitled Component Selection Criteria on pages 38-39 of the SAI is
the following instead of the current paragraph:
The following indexes are collectively referred to herein as the
“Dow Jones U.S. Select Sectors Specialty Indexes”: Dow Jones U.S. Select
Aerospace & Defense Index, Dow Jones U.S. Select Health Care
Providers Index, Dow Jones U.S. Select Home Construction Index,
Dow Jones U.S. Select Insurance Index, Dow Jones U.S. Select
Investment Services Index, Dow Jones U.S. Select Medical Equipment
Index, Dow Jones U.S. Select Oil Equipment & Services Index, Dow Jones
U.S. Select Oil Exploration & Production Index, Dow Jones U.S. Select
Pharmaceuticals Index, Dow Jones U.S. Select Regional Banks Index and
Dow Jones U.S. Select Telecommunications Index. The Dow Jones U.S.
Real Estate Capped Index is part of the Dow Jones Global Indices family.
On a quarterly basis, SPDJI conducts reviews of the float-adjusted
market capitalizations and weightings of the securities in the Underlying
Indexes.
Prior to September 20, 2021, the third paragraph of the section
entitled Component Selection Criteria on pages 38-39 of the SAI is
the following instead of the current paragraph:
Other than the Dow Jones U.S. Select Home Construction Index, the
Dow Jones U.S. Select Regional Banks Index and the Dow Jones U.S.
Select Telecommunications Index, on the last business day of the
month prior to the quarterly review, a security must have a $500 million
float-adjusted market capitalization to be added to a Dow Jones U.S.
Select Sector Specialty Index or the Dow Jones U.S. Real Estate Capped
Index; securities with a float-adjusted market capitalization below
$250 million will be removed from the applicable Underlying Index.
Prior to September 20, 2021, the fourth paragraph of the section
entitled Component Selection Criteria on page 39 of the SAI is the
following instead of the current paragraph:
On the last business day of the month prior to the quarterly review, a
security must have a $500 million float-adjusted market capitalization
to be added to each of the Dow Jones U.S. Select Home Construction
Index and Dow Jones U.S. Select Telecommunications Index; securities
with a float-adjusted market capitalization below $100 million will be
removed from the applicable Index.
Prior to September 20, 2021, the SAI does not include the section
entitled Russell 1000 Telecommunications RIC 22.5/45 Capped
Index and includes the following:
    Dow Jones U.S. Select Telecommunications Index
    Number of Components: approximately 39
    Index Description. The constituents in the Dow Jones U.S. Select
    Telecommunications Index are classified as telecommunication
    companies within the Dow Jones U.S. Broad Stock Market Index.
    Additional Information. The Dow Jones U.S. Real Estate Capped
    Index, the Dow Jones U.S. Select Aerospace & Defense Index, the
    Dow Jones U.S. Select Health Care Providers Index, the Dow Jones
    U.S. Select Home Construction Index, the Dow Jones U.S. Select
    Insurance Index, the Dow Jones U.S. Select Investment Services
    Index, the Dow Jones U.S. Select Medical Equipment Index, the
    Dow Jones U.S. Select Oil Equipment & Services Index, the Dow Jones
    U.S. Select Oil Exploration & Production Index, the Dow Jones U.S.
    Select Pharmaceuticals Index, the Dow Jones U.S. Select Regional
    Banks Index and the Dow Jones U.S. Select Telecommunications
    Index (collectively, the “Dow Jones Indexes”) are products of SPDJI,
and have been licensed for use by BFA or its affiliates. S&P® is a
     registered trademark of Standard & Poor’s Financial Services LLC
     (“S&P”); Dow Jones® is a registered trademark of Dow Jones
     Trademark Holdings LLC (“Dow Jones”); and these trademarks have
     been licensed for use by SPDJI and sublicensed for certain purposes
     by BFA and its affiliates. The Funds are not sponsored, endorsed,
     sold or promoted by SPDJI, Dow Jones, S&P or their respective
     affiliates or third party licensors and none of such parties make 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 Indexes.
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-IYZ-0721-2

                       PLEASE RETAIN THIS SUPPLEMENT
                           FOR FUTURE REFERENCE
iSHARES® U.S. TELECOMMUNICATIONS ETF
                 Ticker: IYZ                  Stock Exchange: Cboe BZX

Investment Objective
The iShares U.S. Telecommunications ETF (the “Fund”) seeks to track the investment
results of an index composed of U.S. equities in the telecommunications 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
       0.42%                        None                0.00%                0.42%

 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

 $43                           $135                    $235                      $530

                                              S-1
Portfolio Turnover. The Fund may pay               weight of one or more securities in the
transaction costs, such as commissions,            Underlying Index may exceed these
when it buys and sells securities (or              constraints due to fluctuations in
“turns over” its portfolio). A higher              market value, corporate actions, or
portfolio turnover rate may indicate               other events that change the index
higher transaction costs and may result            composition between quarterly
in higher taxes when Fund shares are               rebalance dates.
held in a taxable account. These costs,            A significant portion of the Underlying
which are not reflected in the Annual              Index is represented by securities of
Fund Operating Expenses or in the                  companies in the information
Example, affect the Fund’s                         technology and telecommunications
performance. During the most recent                industries or sectors. The components
fiscal year, the Fund’s portfolio turnover         of the Underlying Index are likely to
rate was 40% of the average value of its           change over time.
portfolio.
                                                   BFA uses a “passive” or indexing
Principal Investment                               approach to try to achieve the Fund’s
Strategies                                         investment objective. Unlike many
                                                   investment companies, the Fund does
The Fund seeks to track the investment             not try to “beat” the index it tracks and
results of the Russell 1000                        does not seek temporary defensive
Telecommunications RIC 22.5/45                     positions when markets decline or
Capped Index (the “Underlying Index”),             appear overvalued.
which measures the performance of the
telecommunications sector of the U.S.              Indexing may eliminate the chance that
equity market, as defined by FTSE                  the Fund will substantially outperform
Russell (the “Index Provider” or                   the Underlying Index but also may
“Russell”). The Underlying Index will              reduce some of the risks of active
include large- and mid-capitalization              management, such as poor security
companies.                                         selection. Indexing seeks to achieve
                                                   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
                                                   that collectively has an investment
The Underlying Index uses a capping
                                                   profile similar to that of an applicable
methodology to constrain at quarterly
                                                   underlying index. The securities
rebalance: (i) the weights of any single
                                                   selected are expected to have, in the
issuer (as determined by Russell) to a
                                                   aggregate, investment characteristics
maximum of 22.5%, and (ii) the
                                                   (based on factors such as market
aggregate weight of all issuers that
                                                   capitalization and industry weightings),
individually exceed 4.5% of the index
                                                   fundamental characteristics (such as
weight to a maximum of 45%. The

                                             S-2
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               Telecommunications Sector Risk.
Underlying Index before fees and                     Companies in the telecommunications
expenses of the Fund.                                sector may be affected by industry
The Fund may lend securities                         competition, substantial capital
representing up to one-third of the value            requirements, government regulation
of the Fund’s total assets (including the            and obsolescence of
value of any collateral received).                   telecommunications products and
                                                     services due to technological
The Underlying Index is sponsored by                 advancement.
Russell, which is part of the London
Stock Exchange Group and is                          Technology Sector Risk. Technology
independent of the Fund and BFA. The                 companies, including information
Index Provider determines the                        technology companies, may have
composition and relative weightings of               limited product lines, markets, financial
the securities in the Underlying Index               resources or personnel. Technology
and publishes information regarding the              companies typically face intense
market value of the Underlying Index.                competition and potentially rapid
                                                     product obsolescence. They are also
Industry Concentration Policy. The                   heavily dependent on intellectual
Fund will concentrate its investments                property rights and may be adversely

                                               S-3
affected by the loss or impairment of              Participants or the issuers of securities
those rights. Companies in the                     in which the Fund invests have the
technology sector are facing increased             ability to cause disruptions, negatively
government and regulatory scrutiny and             impact the Fund’s business operations
may be subject to adverse government               and/or potentially result in financial
or regulatory action.                              losses to the Fund and its shareholders.
Media and Entertainment Industries                 While the Fund has established business
Risk. Several factors can significantly            continuity plans and risk management
affect companies in the media and                  systems seeking to address system
entertainment industries, including                breaches or failures, there are inherent
competition, particularly in the                   limitations in such plans and systems.
formulation of products and services               Furthermore, the Fund cannot control
using new technologies, cyclicality of             the cybersecurity plans and systems of
revenues and earnings, a potential                 the Fund’s Index Provider and other
decrease in the discretionary income of            service providers, market makers,
targeted individuals, changing consumer            Authorized Participants or issuers of
tastes and interests, and the potential            securities in which the Fund invests.
increase in state and federal                      Asset Class Risk. Securities and other
government regulation. Companies in                assets in the Underlying Index or in the
the media and entertainment industries             Fund’s portfolio may underperform in
may become obsolete quickly.                       comparison to the general financial
Equity Securities Risk. Equity                     markets, a particular financial market or
securities are subject to changes in               other asset classes.
value, and their values may be more                Authorized Participant Concentration
volatile than those of other asset                 Risk. Only an Authorized Participant (as
classes. The Underlying Index is                   defined in the Creations and
composed of common stocks, which                   Redemptions section of this prospectus
generally subject their holders to more            (the “Prospectus”)) may engage in
risks than preferred stocks and debt               creation or redemption transactions
securities because common                          directly with the Fund, and none of
stockholders’ claims are subordinated              those Authorized Participants is
to those of holders of preferred stocks            obligated to engage in creation and/or
and debt securities upon the bankruptcy            redemption transactions. The Fund has
of the issuer.                                     a limited number of institutions that
Risk of Investing in the U.S. Certain              may act as Authorized Participants on
changes in the U.S. economy, such as               an agency basis (i.e., on behalf of other
when the U.S. economy weakens or                   market participants). To the extent that
when its financial markets decline, may            Authorized Participants exit the
have an adverse effect on the securities           business or are unable to proceed with
to which the Fund has exposure.                    creation or redemption orders with
                                                   respect to the Fund and no other
Cybersecurity Risk. Failures or                    Authorized Participant is able to step
breaches of the electronic systems of              forward to create or redeem, Fund
the Fund, the Fund’s adviser, distributor,         shares may be more likely to trade at a
the Index Provider and other service               premium or discount to NAV and
providers, market makers, Authorized               possibly face trading halts or delisting.

                                             S-4
Concentration Risk. The Fund may be               its shareholders. Unusual market
susceptible to an increased risk of loss,         conditions may cause the Index
including losses due to adverse events            Provider to postpone a scheduled
that affect the Fund’s investments more           rebalance, which could cause the
than the market as a whole, to the                Underlying Index to vary from its normal
extent that the Fund’s investments are            or expected composition.
concentrated in the securities and/or             Infectious Illness Risk. An outbreak of
other assets of a particular issuer or            an infectious respiratory illness, COVID-
issuers, country, group of countries,             19, caused by a novel coronavirus has
region, market, industry, group of                resulted in travel restrictions, disruption
industries, sector, market segment or             of healthcare systems, prolonged
asset class.                                      quarantines, cancellations, supply chain
Custody Risk. Less developed                      disruptions, lower consumer demand,
securities markets are more likely to             layoffs, ratings downgrades, defaults
experience problems with the clearing             and other significant economic impacts.
and settling of trades, as well as the            Certain markets have experienced
holding of securities by local banks,             temporary closures, extreme volatility,
agents and depositories.                          severe losses, reduced liquidity and
Geographic Risk. A natural disaster               increased trading costs. These events
could occur in a geographic region in             will have an impact on the Fund and its
which the Fund invests, which could               investments and could impact the
adversely affect the economy or the               Fund’s ability to purchase or sell
business operations of companies in the           securities or cause elevated tracking
specific geographic region, causing an            error and increased premiums or
adverse impact on the Fund’s                      discounts to the Fund’s NAV. Other
investments in, or which are exposed to,          infectious illness outbreaks in the future
the affected region.                              may result in similar impacts.

Index-Related Risk. There is no                   Issuer Risk. The performance of the
guarantee that the Fund’s investment              Fund depends on the performance of
results will have a high degree of                individual securities to which the Fund
correlation to those of the Underlying            has exposure. Changes in the financial
Index or that the Fund will achieve its           condition or credit rating of an issuer of
investment objective. Market                      those securities may cause the value of
disruptions and regulatory restrictions           the securities to decline.
could have an adverse effect on the               Large-Capitalization Companies Risk.
Fund’s ability to adjust its exposure to          Large-capitalization companies may be
the required levels in order to track the         less able than smaller capitalization
Underlying Index. Errors in index data,           companies to adapt to changing market
index computations or the construction            conditions. Large-capitalization
of the Underlying Index in accordance             companies may be more mature and
with its methodology may occur from               subject to more limited growth potential
time to time and may not be identified            compared with smaller capitalization
and corrected by the Index Provider for           companies. During different market
a period of time or at all, which may             cycles, the performance of large-
have an adverse impact on the Fund and            capitalization companies has trailed the

                                            S-5
overall performance of the broader                  depend on the performance of a small
securities markets.                                 number of issuers.
Management Risk. As the Fund will not               Operational Risk. The Fund is exposed
fully replicate the Underlying Index, it is         to operational risks arising from a
subject to the risk that BFA’s                      number of factors, including, but not
investment strategy may not produce                 limited to, human error, processing and
the intended results.                               communication errors, errors of the
Market Risk. The Fund could lose                    Fund’s service providers, counterparties
money over short periods due to short-              or other third parties, failed or
term market movements and over                      inadequate processes and technology
longer periods during more prolonged                or systems failures. The Fund and BFA
market downturns. Local, regional or                seek to reduce these operational risks
global events such as war, acts of                  through controls and procedures.
terrorism, the spread of infectious                 However, these measures do not
illness or other public health issues,              address every possible risk and may be
recessions, or other events could have a            inadequate to address significant
significant impact on the Fund and its              operational risks.
investments and could result in                     Passive Investment Risk. The Fund is
increased premiums or discounts to the              not actively managed, and BFA generally
Fund’s NAV.                                         does not attempt to take defensive
Market Trading Risk. The Fund faces                 positions under any market conditions,
numerous market trading risks,                      including declining markets.
including the potential lack of an active           Securities Lending Risk. The Fund may
market for Fund shares, losses from                 engage in securities lending. Securities
trading in secondary markets, periods of            lending involves the risk that the Fund
high volatility and disruptions in the              may lose money because the borrower
creation/redemption process. ANY OF                 of the loaned securities fails to return
THESE FACTORS, AMONG OTHERS,                        the securities in a timely manner or at
MAY LEAD TO THE FUND’S SHARES                       all. The Fund could also lose money in
TRADING AT A PREMIUM OR DISCOUNT                    the event of a decline in the value of
TO NAV.                                             collateral provided for loaned securities
Mid-Capitalization Companies Risk.                  or a decline in the value of any
Compared to large-capitalization                    investments made with cash collateral.
companies, mid-capitalization                       These events could also trigger adverse
companies may be less stable and more               tax consequences for the Fund.
susceptible to adverse developments. In             Tracking Error Risk. The Fund may be
addition, the securities of mid-                    subject to tracking error, which is the
capitalization companies may be more                divergence of the Fund’s performance
volatile and less liquid than those of              from that of the Underlying Index.
large-capitalization companies.                     Tracking error may occur because of
Non-Diversification Risk. The Fund                  differences between the securities and
may invest a large percentage of its                other instruments held in the Fund’s
assets in securities issued by or                   portfolio and those included in the
representing a small number of issuers.             Underlying Index, pricing differences,
As a result, the Fund’s performance may             transaction costs incurred by the Fund,

                                              S-6
the Fund’s holding of uninvested cash,                        and expenses, while the Underlying
differences in timing of the accrual of or                    Index does not.
the valuation of dividends or interest,
the requirements to maintain pass-                            Performance Information
through tax treatment, portfolio                              The bar chart and table that follow show
transactions carried out to minimize the                      how the Fund has performed on a
distribution of capital gains to                              calendar year basis and provide an
shareholders, acceptance of custom                            indication of the risks of investing in the
baskets, changes to the Underlying                            Fund. Both assume that all dividends
Index or the costs to the Fund of                             and distributions have been reinvested
complying with various new or existing                        in the Fund. Past performance (before
regulatory requirements. This risk may                        and after taxes) does not necessarily
be heightened during times of increased                       indicate how the Fund will perform in
market volatility or other unusual                            the future.
market conditions. Tracking error also
may result because the Fund incurs fees
                   Year by Year Returns1 (Years Ended December 31)

               45%

               30%                    26.24%
                                                             22.14%
                             18.48%                                                    16.26%
               15%
                                                                                                4.08%
                                               0.51% 0.48%
                 0%

               -15% -7.29%                                            -11.59% -8.55%

               -30%

                      2011 2012 2013 2014 2015 2016 2017 2018 2019 2020

 1
     The Fund’s year-to-date return as of June 30, 2021 was 11.40%.
The best calendar quarter return during the periods shown above was 14.39% in the
3rd quarter of 2012; the worst was -17.49% in the 3rd quarter of 2011.
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
Average Annual Total Returns
                       (for the periods ended December 31, 2020)
                                                               One Year     Five Years    Ten Years
(Inception Date: 5/22/2000)
   Return Before Taxes                                           4.08%        3.63%         5.28%
   Return After Taxes on Distributions1                          3.36%        2.89%         4.65%
   Return After Taxes on Distributions and Sale of Fund
   Shares1                                                       2.81%        2.67%         4.13%
Dow Jones U.S. Select Telecommunications Index
(Index returns do not reflect deductions for fees,
expenses, or taxes)                                              4.33%        3.74%         5.50%
Russell 1000 Telecommunications RIC 22.5/45
Capped Index2 (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
        Effective September 20, 2021, the Fund’s Underlying Index will change from the Dow
        Jones U.S. Select Telecommunications Index to the Russell 1000 Telecommunications RIC
        22.5/45 Capped Index. The inception date of the Russell 1000 Telecommunications RIC
        22.5/45 Capped Index is July 9.

                                                 S-8
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
Purchase and Sale of Fund                        financial intermediary (such as a bank),
                                                 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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For more information visit www.iShares.com or call 1-800-474-2737
IS-SP-IYZ-0721

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