2021 Prospectus - iShares

1 DECEMBER 1, 20222022 ProspectusiSharesS&PAllocationSeries iShares Core Conservative Allocation ETF|AOK|NYSEARCA iShares Core Moderate Allocation ETF|AOM|NYSEARCA iShares Core Growth Allocation ETF| AOR | NYSE ARCA iShares Core Aggressive Allocation ETF|AOA|NYSEARCAThe Securities and Exchange Commission ( SEC ) has not approved or disapproved these securities or passed upon the adequacy ofthis Prospectus . Any representation to the contrary is a criminal iShares , TrustiShares ETF TrustSupplement dated February 8, 2023 (the Supplement )to the Summary Prospectus (the Summary Prospectus ), Prospectus (the Prospectus ) andStatement of Additional Information ( SAI )for each of the funds listed below (each, a Fund )The information in this Supplement updates information in, and should be read in conjunction with,each Fund s Summary Prospectus , Prospectus , and of February 8, 2023, Amy Whitelaw is no longer a Portfolio Manager for the Funds.

2 All references toMs. Whitelaw in the Summary Prospectus , Prospectus , and SAI are hereby removedSupplement to the Summary Prospectus , Prospectus and Statement of Additional Information eachdated as of March 1, 2022: iShares Bloomberg Roll Select Commodity StrategyETFiShares Commodity Curve Carry Strategy ETFiShares Gold Strategy ETFiShares GSCI Commodity Dynamic Roll StrategyETFiShares Yield Optimized Bond ETFS upplement to the Summary Prospectus dated April 26, 2022 and the Prospectus and Statement ofAdditional Information each dated as of April 6, 2022: iShares Blockchain and Tech ETFS upplement to the Summary Prospectus and Prospectus both dated as of August 1, 2022, and to theStatement of Additional Information dated as of August 1, 2022 (as revised October 3, 2022): iShares Asia 50 ETFiShares Emerging Markets Infrastructure ETFiShares Global 100 ETFiShares Global Comm Services ETFiShares Global Consumer Discretionary ETFiShares Global Consumer Staples ETFiShares Global Energy ETFiShares Global Financials ETFiShares Global Healthcare ETFiShares Global Industrials ETFiShares Global Materials ETFiShares Global Tech ETFiShares Global Timber & Forestry ETFiShares Global Utilities ETFiShares India 50 ETFiShares International Developed Property ETFiShares International Dividend Growth ETFiShares Latin America 40 ETFS upplement to the Summary Prospectus and Prospectus both dated as of August 1, 2022, and to theStatement of Additional Information dated as of August 1, 2022 (as revised January 27, 2023).

3 iShares Biotechnology ETFiShares Core S&P 500 ETFiShares Core S&P Mid-Cap ETFiShares Core S&P Small-Cap ETFiShares Core S&P Total Stock Market ETFiShares Core S&P Growth ETFiShares Core S&P Value ETFiShares ESG Screened S&P 500 ETFiShares ESG Screened S&P Mid-Cap ETFiShares ESG Screened S&P Small-Cap ETFiShares Europe ETFiShares Expanded Tech Sector ETFiShares Expanded Tech-Software Sector ETFiShares Factors US Growth Style ETFiShares Focused Value Factor ETFiShares International Developed Small Cap ValueFactor ETFiShares JPX-Nikkei 400 ETFiShares Micro-Cap ETFiShares Mortgage Real Estate ETFiShares North American Natural Resources ETFiShares North American Tech-MultimediaNetworking ETFiShares Preferred and Income Securities ETFiShares Residential and Multisector Real Estate ETFiShares Russell 1000 ETFiShares Russell 1000 Growth ETFiShares Russell 1000 Value ETFiShares Russell 2000 ETFiShares Russell 2000 Growth ETFiShares Russell 2000 Value ETFiShares Russell 3000 ETFiShares Russell Mid-Cap ETFiShares Russell Mid-Cap Growth ETFiShares Russell Mid-Cap Value ETFiShares Russell Top 200 ETFiShares Russell Top 200 Growth ETFiShares Russell Top 200 Value ETFiShares S&P 100 ETF iShares S&P 500 Growth ETFiShares S&P 500 Value ETFiShares S&P Mid-Cap 400 Growth ETFiShares S&P Mid-Cap 400 Value ETFiShares S&P Small-Cap 600 Growth ETFiShares S&P Small-Cap 600 Value ETFiShares Semiconductor ETFiShares Aerospace & Defense ETFiShares Broker-Dealers & Securities ExchangesETFiShares Healthcare Providers ETFiShares Home Construction ETFiShares Infrastructure ETFiShares Insurance ETFiShares Medical Devices

4 ETFiShares Oil & Gas Exploration & Production ETFiShares Oil Equipment & Services ETFiShares Pharmaceuticals ETFiShares Real Estate ETFiShares Regional Banks ETFiShares Telecommunications ETFiShares US Small Cap Value Factor ETFS upplement to the Summary Prospectus dated as of August 1, 2022 and the Prospectus andStatement of Additional Information each dated as of August 1, 2022 (as revised October 3, 2022): iShares Global Infrastructure ETFS upplement to the Summary Prospectus , the Prospectus and Statement of Additional Informationeach dated as of August 1, 2022 (as revised January 27, 2023): iShares Factors US Value Style ETFS upplement to the Summary Prospectus , Prospectus and Statement of Additional Information eachdated as of August 1, 2022: iShares Russell 2500 ETFS upplement to the Summary Prospectus , Prospectus and Statement of Additional Information eachdated as of September 1, 2022: iShares Asia/Pacific Dividend ETFiShares Emerging Markets Dividend ETFS upplement to the Summary Prospectus and Prospectus both dated as of September 1, 2022, and tothe Statement of Additional Information dated as of September 1, 2022 (as revised October 3, 2022).

5 iShares Cohen & Steers REIT ETFiShares Core Dividend ETFiShares Core Dividend Growth ETFiShares Core High Dividend ETFiShares Core REIT ETFiShares Dow Jones ETFiShares Global REIT ETFiShares International Select Dividend ETF iShares Morningstar Growth ETFiShares Morningstar Mid-Cap ETFiShares Morningstar Mid-Cap Growth ETF iShares Morningstar Mid-Cap Value ETF iShares Morningstar Small-Cap ETFiShares Morningstar Small-Cap Growth ETF iShares Morningstar Small-Cap Value ETFiSharesMorningstar Equity ETFiShares Morningstar Value ETFiShares MSCI KLD 400 Social ETFiShares MSCI USA ESG Select ETFiShares Select Dividend ETFiShares Basic Materials ETFiShares Consumer Discretionary ETFiShares Consumer Staples ETFiShares Energy ETFiShares Financial Services ETFiShares Financials ETFiShares Healthcare ETFiShares Industrials ETFiShares Technology ETFiShares Transportation ETFiShares Utilities ETFS upplement to the Summary Prospectus dated as of September 1, 2022 and the Prospectus andStatement of Additional Information each dated as of September 1, 2022 (as revised October 3,2022): iShares International Developed Real Estate ETFS upplement to the Summary Prospectus and Prospectus both dated as of September 1, 2022 (asrevised January 31.)

6 2023), and to the Statement of Additional Information dated as of September 1,2022 (as revised October 3, 2022): iShares Global Clean Energy ETFS upplement to the Summary Prospectus , Prospectus and Statement of Additional Information eachdated as of December 1, 2022: iShares China Large-Cap ETFiShares Core MSCI EAFE ETFiShares Core MSCI Europe ETFiShares Core MSCI International Developed MarketsETFiShares Core MSCI Pacific ETFiShares Core MSCI Total International Stock ETFiShares Cybersecurity and Tech ETFiShares ESG MSCI USA Min Vol Factor ETFiShares Exponential Technologies ETFiShares Future Cloud 5G and Tech ETFiShares Genomics Immunology and Healthcare ETFiShares International Equity Factor ETFiShares MSCI ACWI ETFiShares MSCI ACWI ex ETFiShares MSCI ACWI Low Carbon Target ETFiShares MSCI All Country Asia ex Japan ETFiShares MSCI China A ETFiShares MSCI EAFE ETFiShares MSCI EAFE Growth ETFiShares MSCI EAFE Min Vol Factor ETFiShares MSCI EAFE Small-Cap ETFiShares MSCI EAFE Value ETFiShares MSCI Europe Financials ETFiShares MSCI Europe Small-Cap ETFiShares MSCI Global

7 Multifactor ETFiShares MSCI Intl Momentum Factor ETFiShares MSCI Intl Quality Factor ETFiShares MSCI Intl Size Factor ETFiShares MSCI Intl Small-Cap Multifactor ETFiShares MSCI Intl Value Factor ETFiShares MSCI Kokusai ETFiShares MSCI USA Min Vol Factor ETFiShares MSCI USA Momentum Factor ETFiShares MSCI USA Quality Factor ETFiShares MSCI USA Size Factor ETFiShares MSCI USA Small-Cap Min Vol Factor ETFiShares MSCI USA Small-Cap Multifactor ETFiShares MSCI USA Value Factor ETFiShares Neuroscience and Healthcare ETFiShares Robotics and Artificial IntelligenceMultisector ETFiShares Self-Driving EV and Tech ETFiShares Equity Factor ETFiShares Tech Breakthrough Multisector ETFiShares Virtual Work and Life Multisector ETFS upplement to the Prospectus and Statement of Additional Information each dated as ofDecember 1, 2022: iShares Core Aggressive Allocation ETFiShares Core Conservative Allocation ETFiShares Core Growth Allocation ETFiShares Core Moderate Allocation ETFiShares ESG Aware Aggressive Allocation ETFiShares ESG Aware Conservative Allocation ETFiShares ESG Aware Growth Allocation ETFiShares ESG Aware Moderate Allocation ETFiShares Morningstar Multi-Asset Income ETFS upplement to the Summary Prospectus , Prospectus and Statement of Additional Information eachdated as of December 29, 2022.

8 iShares Core MSCI Emerging Markets ETFiShares Emergent Food and AgTech Multisector ETFiShares ESG Advanced MSCI EAFE ETFiShares ESG Advanced MSCI EM ETFiShares ESG Advanced MSCI USA ETFiShares ESG Aware MSCI EAFE ETFiShares ESG Aware MSCI EM ETFiShares ESG Aware MSCI USA ETFiShares ESG Aware MSCI USA Small-Cap ETFiShares ESG MSCI EM Leaders ETFiShares ESG MSCI USA Leaders ETFiShares MSCI Agriculture Producers ETFiShares MSCI Australia ETFiShares MSCI Austria ETFiShares MSCI Belgium ETFiShares MSCI BIC ETFiShares MSCI Brazil ETFiShares MSCI Brazil Small-Cap ETFiShares MSCI Canada ETFiShares MSCI Chile ETFiShares MSCI China ETFiShares MSCI China Multisector Tech ETFiShares MSCI China Small-Cap ETFiShares MSCI Denmark ETFiShares MSCI Emerging Markets Asia ETFiShares MSCI Emerging Markets ETFiShares MSCI Emerging Markets ex China ETFiShares MSCI Emerging Markets Min Vol Factor ETFiShares MSCI Emerging Markets Multifactor ETFiShares MSCI Emerging Markets Small-Cap ETFiShares MSCI Eurozone ETFiShares MSCI Finland ETFiShares MSCI France ETFiShares MSCI Frontier and Select EM ETFiShares MSCI Germany ETFiShares MSCI Germany Small-Cap ETFiShares MSCI Global Energy Producers ETFiShares MSCI Global Gold Miners ETFiShares MSCI Global Metals & Mining Producers ETFiShares MSCI Global Min Vol Factor ETFiShares MSCI Global Silver and Metals Miners ETFiShares MSCI Global Sustainable Development GoalsETFiShares MSCI Hong Kong ETFiShares MSCI India Small-Cap ETFiShares MSCI Indonesia ETFiShares MSCI Ireland ETFiShares MSCI Israel ETFiShares MSCI Italy ETFiShares MSCI Japan ETFiShares MSCI Japan Small-Cap ETFiShares MSCI Japan Value

9 ETFiShares MSCI Kuwait ETFiShares MSCI Malaysia ETFiShares MSCI Mexico ETFiShares MSCI Netherlands ETFiShares MSCI New Zealand ETFiShares MSCI Norway ETFiShares MSCI Pacific ex Japan ETFiShares MSCI Peru ETFiShares MSCI Philippines ETFiShares MSCI Poland ETFiShares MSCI Qatar ETFiShares MSCI Russia ETFiShares MSCI Saudi Arabia ETFiShares MSCI Singapore ETFiShares MSCI South Africa ETFiShares MSCI South Korea ETFiShares MSCI Spain ETFiShares MSCI Sweden ETFiShares MSCI Switzerland ETFiShares MSCI Taiwan ETFiShares MSCI Thailand ETFiShares MSCI Turkey ETFiShares MSCI UAE ETFiShares MSCI United Kingdom ETFiShares MSCI United Kingdom Small-Cap ETFiShares MSCI USA Equal Weighted ETFiShares MSCI World ETFiShares Paris-Aligned Climate MSCI USA ETFS upplement to the Summary Prospectus and Prospectus both dated as of December 29, 2022 (asrevised January 13, 2023) and Statement of Additional Information dated as of December 29, 2022: iShares MSCI India ETFS upplement to the Summary Prospectus dated September 21, 2022 and the Prospectus andStatement of Additional Information each dated as of September 6, 2022: iShares MSCI Water Management Multisector ETFS upplement to the Summary Prospectus dated November 16, 2022 and the Prospectus andStatement of Additional Information each dated as of September 22, 2022 (as revisedNovember 9, 2022): iShares Environmentally Aware Real Estate ETFS upplement to the Summary Prospectus dated November 2, 2022 and the Prospectus and Statementof Additional Information each dated as of October 24, 2022.

10 iShares Environmental Infrastructure and Industrials ETFS upplement to the Summary Prospectus dated February 1, 2023 and the Prospectus and Statementof Additional Information each dated as of Decemb