MARCH 31, ANNUAL REPORT. ishares Trust ishares Mortgage Real Estate ETF REM Cboe BZX ishares Residential Real Estate ETF REZ NYSE Arca

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1 MARCH 31, ANNUAL REPORT ishares Trust ishares Mortgage Real Estate ETF REM Cboe BZX ishares Residential Real Estate ETF REZ NYSE Arca

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3 Table of Contents Management s Discussions of Fund Performance... 5 About Fund Performance Shareholder Expenses Schedules of Investments ishares Mortgage Real Estate ETF ishares Residential Real Estate ETF Financial Statements Financial Highlights Notes to Financial Statements Report of Independent Registered Public Accounting Firm Tax Information Supplemental Information Trustee and Officer Information General Information... 39

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5 Management s Discussion of Fund Performance U.S. EQUITY MARKET OVERVIEW U.S. stocks posted positive returns for the 12 months ended March 31, 2018 ( reporting period ). The Russell 3000 Index, a broad measure of U.S. equity market performance, returned 13.81% for the reporting period. For much of the reporting period, stocks steadily advanced as market volatility declined to a record low. The key driver of stocks was record corporate profit growth across virtually all sectors of the market. A strengthening U.S. economy, federal tax reform, deregulation, and a recovery in commodity prices all led to increases in corporate profits. There was also a significant international element to rising corporate profits, as the sectors that produced the largest gains in profitability (energy, materials, and information technology) were also those with the most significant exposure to global economic activity. The final nine months of 2017 featured the strongest three consecutive quarters of U.S. economic growth in more than 12 years. Key economic drivers during the reporting period included an increase in manufacturing activity and the lowest unemployment rate since December The strong job market contributed to wage increases and a related surge in consumer spending. Strong domestic demand led to the fastest growth in U.S. imports of foreign goods in more than seven years, underscoring the strength of the global economy. In December 2017, the U.S. government passed federal tax reform legislation that included a steep reduction in corporate tax rates and a modest decrease in individual tax rates. Lower corporate taxes translate directly into higher corporate profits. In addition, tax reform incentivized companies to repatriate cash held outside of the U.S., raising expectations for capital spending, acquisitions, dividends, stock repurchases, and, ultimately, economic growth. By January 2018, the major U.S. stock indexes reached all-time highs. However, late in the reporting period market volatility surged to its largest-ever, one-day increase and remained elevated, detracting from previous gains. The tax cuts raised concerns about higher federal budget deficits and rising inflation, which caused Treasury bond yields to rise to their highest level in four years in February In addition, investors grew concerned that the U.S. Federal Reserve Bank ( Fed ) might increase interest rates faster than previously expected. Higher interest rates typically increase the appeal of bonds as an alternative to stocks while also raising borrowing costs for companies and consumers, which can have a negative impact on corporate profits and economic growth. Another factor negatively affecting U.S. stocks late in the reporting period was the announcement of U.S. tariffs on steel and aluminum, as well as on a range of goods from China, leading to concerns about the possibility of a wider trade war and economic disruption. For the reporting period, large-capitalization stocks outperformed mid- and small-capitalization equities. In addition, growthoriented stocks outperformed value-oriented equities across all market capitalizations. Consequently, large-capitalization growth stocks were the strongest-performing segment of the market. These outcomes can be explained in part by the significant outperformance of a handful of large growth-oriented companies that benefited from an ongoing shift toward e-commerce, digital advertising, cloud computing, mobile devices, and streaming services. At the same time, the underperforming value-oriented stocks tended to be those with little or no exposure to these technological trends. They were also more domestically focused and therefore did not benefit from strong global growth. M ANAGEMENT S D ISCUSSIONS OF F UND P ERFORMANCE 5

6 Management s Discussion of Fund Performance ishares MORTGAGE REAL ESTATE ETF Performance as of March 31, 2018 Average Annual Total Returns Cumulative Total Returns NAV MARKET INDEX NAV MARKET INDEX 1 Year 3.10% 3.11% 3.51% 3.10% 3.11% 3.51% 5 Years 4.06% 4.01% 4.56% 22.00% 21.71% 24.95% 10 Years 4.07% 4.03% 7.18% 49.00% 48.46% % GROWTH OF $10,000 INVESTMENT (AT NET ASSET VALUE) $25,000 $20,000 $20,001 $15,000 $14,900 $10,000 $5,000 Mar 09 Mar 10 Mar 11 Mar 12 Mar 13 Mar 14 Mar 15 Mar 16 Mar 17 Mar 18 Fund Index Total returns presented represent performance as of March 29, 2018, the last day the Fund s listing exchange was open for trading during the reporting period. Index performance through March 1, 2009 reflects the performance of the FTSE NAREIT Mortgage REITs Index. Index performance beginning on March 2, 2009 reflects the performance of the FTSE NAREIT All Mortgage Capped Index. Past performance is no guarantee of future results. Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares. See About Fund Performance on page 10 for more information. Beginning Account Value (10/1/17) Actual Ending Account Value (3/31/18) Expenses Paid During Period a Shareholder Expenses Beginning Account Value (10/1/17) Hypothetical 5% Return Ending Account Value (3/31/18) Expenses Paid During Period a Annualized Expense Ratio $ 1, $ $ 2.34 $ 1, $ 1, $ % a Expenses are calculated using the Fund s annualized expense ratio (as disclosed in the table), multiplied by the average account value for the period, multiplied by the number of days in the period (182 days) and divided by the number of days in the year (365 days). See Shareholder Expenses on page 10 for more information ishares A NNUAL R EPORT TO S HAREHOLDERS

7 Management s Discussion of Fund Performance (Continued) ishares MORTGAGE REAL ESTATE ETF The ishares Mortgage Real Estate ETF (the Fund ) (formerly the ishares Mortgage Real Estate Capped ETF) seeks to track the investment results of an index composed of U.S. real estate investment trusts (REITs) that hold U.S. residential and commercial mortgages, as represented by the FTSE NAREIT All Mortgage Capped Index (the Index ). The Fund invests in a representative sample of securities included in the Index that collectively has an investment profile similar to the Index. Due to the use of representative sampling, the Fund may or may not hold all of the securities that are included in the Index. For the 12-month reporting period ended March 31, 2018, the total return for the Fund was 3.10%, net of fees, while the total return for the Index was 3.51%. The profitability of residential and commercial mortgage REITs is driven by their net interest margin the gap between funding costs and the interest earned on investments. This characteristic gives mortgage REITs some of the highest yields in the REIT market, and it bolstered mortgage REIT performance for much of the reporting period. Since interest rates remained low by historical standards, particularly early in the reporting period, mortgage REITs benefited as income investors sought higher yields in a low interest rate environment. Continued strength in the housing and commercial property markets led to fewer mortgage defaults, which provided greater stability for the cash flows of mortgage REITs. Strong investor demand for yield and improving credit conditions benefited mortgage REITs for the reporting period. However, net interest margins also make mortgage REITs one of the most interest-rate-sensitive segments of the REIT market. In particular, rising short-term interest rates generally result in a narrower net interest margin and reduced profitability for mortgage REITs because they rely primarily on short-term funding sources. Although mortgage REITs typically employ sophisticated hedging techniques to reduce interest rate risk, they are still susceptible, especially during periods of abrupt interest rate volatility. For example, mortgage REITs declined sharply late in the reporting period, when interest rates rose rapidly in anticipation of stronger U.S. economic growth and rising inflation. One mitigating factor for mortgage REITs in a rising interest rate environment is a reduction in mortgage refinancing activity. As interest rates increase, home and commercial property owners are less likely to refinance their mortgages, which provides further stability to mortgage REIT cash flows. ALLOCATION BY SECTOR As of 3/31/18 Percentage of Sector Total Investments* Mortgage REITs 98.21% Diversified REITs 1.32 Specialized REITs 0.47 TOTAL % TEN LARGEST FUND HOLDINGS As of 3/31/18 Percentage of Security Total Investments* Annaly Capital Management Inc % AGNC Investment Corp New Residential Investment Corp Starwood Property Trust Inc MFA Financial Inc Two Harbors Investment Corp Chimera Investment Corp Blackstone Mortgage Trust Inc. Class A 4.39 Apollo Commercial Real Estate Finance Inc Invesco Mortgage Capital Inc TOTAL 70.29% * Excludes money market funds. M ANAGEMENT S D ISCUSSIONS OF F UND P ERFORMANCE 7

8 Management s Discussion of Fund Performance ishares RESIDENTIAL REAL ESTATE ETF Performance as of March 31, 2018 Average Annual Total Returns Cumulative Total Returns NAV MARKET INDEX NAV MARKET INDEX 1 Year (5.41)% (5.37)% (4.99)% (5.41)% (5.37)% (4.99)% 5 Years 6.29% 6.30% 6.65% 35.63% 35.75% 37.97% 10 Years 7.50% 7.50% 7.79% % % % GROWTH OF $10,000 INVESTMENT (AT NET ASSET VALUE) $25,000 $20,000 $21,167 $20,603 $15,000 $10,000 $5,000 Mar 09 Mar 10 Mar 11 Mar 12 Mar 13 Mar 14 Mar 15 Mar 16 Mar 17 Mar 18 Fund Index Total returns presented represent performance as of March 29, 2018, the last day the Fund s listing exchange was open for trading during the reporting period. Index performance through March 1, 2009 reflects the performance of the FTSE NAREIT Residential Index. Index performance beginning on March 2, 2009 reflects the performance of the FTSE NAREIT All Residential Capped Index. Past performance is no guarantee of future results. Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares. See About Fund Performance on page 10 for more information. Beginning Account Value (10/1/17) Actual Ending Account Value (3/31/18) Expenses Paid During Period a Shareholder Expenses Beginning Account Value (10/1/17) Hypothetical 5% Return Ending Account Value (3/31/18) Expenses Paid During Period a Annualized Expense Ratio $ 1, $ $ 2.30 $ 1, $ 1, $ % a Expenses are calculated using the Fund s annualized expense ratio (as disclosed in the table), multiplied by the average account value for the period, multiplied by the number of days in the period (182 days) and divided by the number of days in the year (365 days). See Shareholder Expenses on page 10 for more information ishares A NNUAL R EPORT TO S HAREHOLDERS

9 Management s Discussion of Fund Performance (Continued) ishares RESIDENTIAL REAL ESTATE ETF The ishares Residential Real Estate ETF (the Fund ) (formerly the ishares Residential Real Estate Capped ETF) seeks to track the investment results of an index composed of U.S. residential, healthcare and self-storage real estate equities, as represented by the FTSE NAREIT All Residential Capped Index (the Index ). The Fund invests in a representative sample of securities included in the Index that collectively has an investment profile similar to the Index. Due to the use of representative sampling, the Fund may or may not hold all of the securities that are included in the Index. For the 12-month reporting period ended March 31, 2018, the total return for the Fund was -5.41%, net of fees, while the total return for the Index was -4.99%. Rising interest rates during the reporting period weighed on residential REITs performance. This was especially true late in the reporting period, when interest rates rose sharply in anticipation of stronger U.S. economic growth and rising inflation. Higher interest rates typically increase borrowing costs for REITs and make their relatively high dividend yields less attractive when compared with rising bond yields. Healthcare REITs companies that own hospitals, medical offices, senior living facilities, and other healthcare-related properties detracted the most from the Index s performance for the reporting period. Concerns about a supply-and-demand imbalance among senior living facilities weighed on the sector as a substantial number of units opened without a corresponding increase in residents. Expected reductions in Medicare reimbursements and a new payment system for skilled nursing facilities also negatively affected the performance of healthcare REITs. On the positive side, specialty REITs contributed to the Index s return for the reporting period. The Index s specialty REIT segment is comprised of self-storage REITs, which have benefited from a significant increase in new construction in recent years. Despite the dampening effect of new supply on rent growth, self-storage REITs benefited from their relatively short lease terms (typically month-to-month), which allow them to reset their pricing more frequently and makes them less sensitive to rising interest rates. The performance of residential REITs, which own rental properties such as apartments, single-family homes, and student housing, was largely unchanged for the reporting period. An increase in new construction of rental housing was offset by continued demand for renting over home ownership, particularly following the recent tax reform provisions that reduced the mortgage interest and property tax deductions. ALLOCATION BY SECTOR As of 3/31/18 Percentage of Sector Total Investments* Residential REITs 48.95% Health Care REITs Specialized REITs TOTAL % TEN LARGEST FUND HOLDINGS As of 3/31/18 Percentage of Security Total Investments* Public Storage 10.45% AvalonBay Communities Inc Equity Residential 7.74 Welltower Inc Ventas Inc Essex Property Trust Inc HCP Inc Extra Space Storage Inc Mid-America Apartment Communities Inc UDR Inc TOTAL 61.31% * Excludes money market funds. M ANAGEMENT S D ISCUSSIONS OF F UND P ERFORMANCE 9

10 About Fund Performance Past performance is no guarantee of future results. Current performance may be lower or higher than the performance data quoted. Performance data current to the most recent month-end is available at Performance results assume reinvestment of all dividends and capital gain distributions and do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares. The investment return and principal value of shares will vary with changes in market conditions. Shares may be worth more or less than their original cost when they are redeemed or sold in the market. Performance for certain funds may reflect a waiver of a portion of investment advisory fees. Without such a waiver, performance would have been lower. Net asset value or NAV is the value of one share of a fund as calculated in accordance with the standard formula for valuing mutual fund shares. The price used to calculate market return ( Market Price ) is determined by using the midpoint between the highest bid and the lowest offer on the primary stock exchange on which shares of a fund are listed for trading, as of the time that such fund s NAV is calculated. Certain funds may have a NAV which is determined prior to the opening of regular trading on its listed exchange and their market returns are calculated using the midpoint of the bid/ask spread as of the opening of regular trading on the exchange. Market and NAV returns assume that dividends and capital gain distributions have been reinvested at Market Price and NAV, respectively. An index is a statistical composite that tracks a specified financial market or sector. Unlike a fund, an index does not actually hold a portfolio of securities and therefore does not incur the expenses incurred by a fund. These expenses negatively impact fund performance. Also, market returns do not include brokerage commissions that may be payable on secondary market transactions. If brokerage commissions were included, market returns would be lower. Shareholder Expenses As a shareholder of a Fund, you incur two types of costs: (1) transaction costs, including brokerage commissions on purchases and sales of fund shares and (2) ongoing costs, including management fees and other fund expenses. The expense example, which is based on an investment of $1,000 invested on October 1, 2017 and held through March 31, 2018, is intended to help you understand your ongoing costs (in dollars and cents) of investing in a Fund and to compare these costs with the ongoing costs of investing in other funds. Actual Expenses The table provides information about actual account values and actual expenses. Annualized expense ratios reflect contractual and voluntary fee waivers, if any. To estimate the expenses that you paid on your account over the period, simply divide your account value by $1,000 (for example, an $8,600 account value divided by $1,000 = 8.6), then multiply the result by the number corresponding to your Fund under the heading entitled Expenses Paid During Period. Hypothetical Example for Comparison Purposes The table also provides information about hypothetical account values and hypothetical expenses based on each Fund s actual expense ratio and an assumed rate of return of 5% per year before expenses. You may use this information to compare the ongoing costs of investing in your Fund and other funds. To do so, compare this 5% hypothetical example with the 5% hypothetical examples that appear in the shareholder reports of the other funds. Please note that the expenses shown in the table are meant to highlight your ongoing costs only and do not reflect any transactional costs, such as brokerage commissions paid on purchases and sales of fund shares. Therefore, the hypothetical examples are useful in comparing ongoing costs only and will not help you determine the relative total costs of owning different funds. In addition, if these transactional costs were included, your costs would have been higher ishares A NNUAL R EPORT TO S HAREHOLDERS

11 Schedule of Investments ishares MORTGAGE REAL ESTATE ETF March 31, 2018 Security Shares Value COMMON STOCKS 97.78% DIVERSIFIED REITS 1.29% istar Inc. a,b 1,276,735 $ 12,984,395 12,984,395 MORTGAGE REITS 96.03% AG Mortgage Investment Trust Inc. a 543,510 9,440,769 AGNC Investment Corp. a 5,694, ,740,716 Annaly Capital Management Inc. a 16,876, ,024,836 Anworth Mortgage Asset Corp. a 1,874,917 8,999,601 Apollo Commercial Real Estate Finance Inc. a 2,085,014 37,488,552 Arbor Realty Trust Inc. a 1,040,421 9,176,513 Ares Commercial Real Estate Corp. a 519,335 6,413,787 ARMOUR Residential REIT Inc. a 798,768 18,595,319 Blackstone Mortgage Trust Inc. Class A a 1,373,794 43,164,607 Capstead Mortgage Corp. 1,861,106 16,098,567 Cherry Hill Mortgage Investment Corp. a 227,423 3,988,999 Chimera Investment Corp. a 2,526,028 43,978,147 CYS Investments Inc. a 3,000,790 20,165,309 Dynex Capital Inc. a 1,012,072 6,710,037 Ellington Residential Mortgage REIT 177,161 1,941,685 Granite Point Mortgage Trust Inc. a 835,979 13,827,093 Great Ajax Corp. 304,162 4,121,395 Hannon Armstrong Sustainable Infrastructure Capital Inc. a 983,493 19,178,114 Invesco Mortgage Capital Inc. a 2,180,365 35,714,379 KKR Real Estate Finance Trust Inc. 300,095 6,019,906 Ladder Capital Corp. 1,529,764 23,068,841 MFA Financial Inc. a 5,944,208 44,759,886 MTGE Investment Corp. 887,291 15,882,509 New Residential Investment Corp. a 4,832,373 79,492,536 New York Mortgage Trust Inc. a 2,160,958 12,814,481 Orchid Island Capital Inc. a 983,529 7,248,609 PennyMac Mortgage Investment Trust a,c 1,176,281 21,208,346 Redwood Trust Inc. a 1,485,448 22,979,881 Resource Capital Corp. a 585,131 5,564,596 Starwood Property Trust Inc. a 3,712,210 77,770,799 Security Shares Value Sutherland Asset Management Corp. 337,222 $ 5,108,913 TPG RE Finance Trust Inc. 401,068 7,977,243 Two Harbors Investment Corp. 2,882,290 44,300,797 Western Asset Mortgage Capital Corp. a 792,219 7,676, ,642,370 SPECIALIZED REITS 0.46% Jernigan Capital Inc. a 255,588 4,626,143 4,626,143 TOTAL COMMON STOCKS (Cost: $993,755,500) 982,252,908 SHORT-TERM INVESTMENTS 16.90% MONEY MARKET FUNDS 16.90% BlackRock Cash Funds: Institutional, SL Agency Shares 1.84% c,d,e 169,437, ,437,391 BlackRock Cash Funds: Treasury, SL Agency Shares 1.58% c,d 292, , ,730,135 TOTAL SHORT-TERM INVESTMENTS (Cost: $169,740,870) 169,730,135 TOTAL INVESTMENTS IN SECURITIES % (Cost: $1,163,496,370) 1,151,983,043 Other Assets, Less Liabilities (14.68)% (147,449,043) NET ASSETS % $1,004,534,000 a All or a portion of this security is on loan. b Non-income producing security. c Affiliate of the Fund. d Annualized 7-day yield as of period end. e All or a portion of this security was purchased with cash collateral received from loaned securities. S CHEDULES OF I NVESTMENTS 11

12 Schedule of Investments (Continued) ishares MORTGAGE REAL ESTATE ETF March 31, 2018 Affiliates (Note 2) Investments in issuers considered to be affiliates of the Fund during the year ended March 31, 2018, for purposes of Section 2(a)(3) of the 1940 Act were as follows: Affiliated issuer Shares held at 03/31/17 Shares purchased Shares sold Shares held at 03/31/18 Value at 03/31/18 Income Change in unrealized Net realized appreciation gain (loss) a (depreciation) BlackRock Cash Funds: Institutional, SL Agency Shares 145,283,981 24,153,410 b 169,437,391 $169,437,391 $ 595,688 c $ (39,958) $ (28,176) BlackRock Cash Funds: Treasury, SL Agency Shares 1,465,354 (1,172,610) b 292, ,744 21,302 PennyMac Mortgage Investment Trust 1,582, ,182 (873,275) 1,176,281 21,208,346 3,009,443 (1,857,545) 1,355,015 $190,938,481 $3,626,433 $(1,897,503) $ 1,326,839 a b c Includes realized capital gain distributions from an affiliated fund, if any. Net of purchases and sales. Includes the Fund s portion of securities lending income earned from the reinvestment of cash collateral from loaned securities (excluding collateral investment fees), net of fees and other payments to and from borrowers of securities. Futures Contracts (Note 5) Futures contracts outstanding as of March 31, 2018 were as follows: Description Number of contracts Expiration date Notional amount (000) Value / unrealized appreciation (depreciation) Long Contracts Dow Jones U.S. Real Estate 738 Jun 2018 $22,081 $ 7,335 Fair Value Measurements Various inputs are used in determining the fair value of financial instruments. For description of the input levels and information about the Fund s policy regarding valuation of financial instruments, see Note 1. The following table summarizes the value of the Fund s investments according to the fair value hierarchy as of March 31, The breakdown of the Fund s investments into major categories is disclosed in the Schedule of Investments above. Level 1 Level 2 Level 3 Total Investments Assets Common stocks $ 982,252,908 $ $ $ 982,252,908 Money market funds 169,730, ,730,135 Total $1,151,983,043 $ $ $1,151,983,043 Derivative financial instruments a Assets Futures contracts $ 7,335 $ $ $ 7,335 Total $ 7,335 $ $ $ 7,335 a Shown at the unrealized appreciation (depreciation) on the contracts. See notes to financial statements ishares A NNUAL R EPORT TO S HAREHOLDERS

13 Schedule of Investments ishares RESIDENTIAL REAL ESTATE ETF March 31, 2018 Security Shares Value COMMON STOCKS 99.35% HEALTH CARE REITS 32.20% CareTrust REIT Inc. 83,648 $ 1,120,883 Community Healthcare Trust Inc. a 19, ,295 Global Medical REIT Inc. a 20, ,433 HCP Inc. 524,326 12,180,093 Healthcare Realty Trust Inc. 136,108 3,771,553 Healthcare Trust of America Inc. Class A 226,169 5,982,170 LTC Properties Inc. 43,654 1,658,852 MedEquities Realty Trust Inc. 32, ,413 Medical Properties Trust Inc. 403,920 5,250,960 National Health Investors Inc. 44,663 3,005,373 New Senior Investment Group Inc. a 91, ,854 Omega Healthcare Investors Inc. a 217,105 5,870,519 Physicians Realty Trust 199,730 3,109,796 Quality Care Properties Inc. b 104,870 2,037,624 Sabra Health Care REIT Inc. a 196,813 3,473,749 Senior Housing Properties Trust 262,581 4,112,019 Universal Health Realty Income Trust 14, ,307 Ventas Inc. 354,074 17,537,285 Welltower Inc. 370,216 20,150,857 91,821,035 RESIDENTIAL REITS 48.63% American Campus Communities Inc. 151,907 5,866,648 American Homes 4 Rent Class A 269,643 5,414,431 Apartment Investment & Management Co. Class A 174,200 7,098,650 AvalonBay Communities Inc. 137,470 22,608,316 Bluerock Residential Growth REIT Inc. a 25, ,512 Camden Property Trust 101,408 8,536,526 Clipper Realty Inc. 17, ,581 Education Realty Trust Inc. 84,421 2,764,788 Equity LifeStyle Properties Inc. 92,603 8,127,765 Equity Residential 355,944 21,933,269 Essex Property Trust Inc. a 65,226 15,698,594 Front Yard Residential Corp. 55, ,122 Independence Realty Trust Inc. a 93, ,034 Invitation Homes Inc. 327,038 7,466,278 Mid-America Apartment Communities Inc. 126,503 11,542,134 NexPoint Residential Trust Inc. 19, ,426 Security Shares Value Preferred Apartment Communities Inc. Class A 42,521 $ 603,373 Sun Communities Inc. 84,773 7,745,709 UDR Inc. 296,244 10,552,211 UMH Properties Inc. 34, , ,664,550 SPECIALIZED REITS 18.52% CubeSmart 200,848 5,663,914 Extra Space Storage Inc. a 135,868 11,869,429 Life Storage Inc. 51,095 4,267,454 National Storage Affiliates Trust 55,842 1,400,517 Public Storage 147,752 29,608,023 52,809,337 TOTAL COMMON STOCKS (Cost: $308,973,410) 283,294,922 SHORT-TERM INVESTMENTS 4.31% MONEY MARKET FUNDS 4.31% BlackRock Cash Funds: Institutional, SL Agency Shares 1.84% c,d,e 11,657,309 11,657,309 BlackRock Cash Funds: Treasury, SL Agency Shares 1.58% c,d 642, ,665 12,299,974 TOTAL SHORT-TERM INVESTMENTS (Cost: $12,299,974) 12,299,974 TOTAL INVESTMENTS IN SECURITIES % (Cost: $321,273,384) 295,594,896 Other Assets, Less Liabilities (3.66)% (10,432,038) NET ASSETS % $285,162,858 a All or a portion of this security is on loan. b Non-income producing security. c Affiliate of the Fund. d Annualized 7-day yield as of period end. e All or a portion of this security was purchased with cash collateral received from loaned securities. S CHEDULES OF I NVESTMENTS 13

14 Schedule of Investments (Continued) ishares RESIDENTIAL REAL ESTATE ETF March 31, 2018 Affiliates (Note 2) Investments in issuers considered to be affiliates of the Fund during the year ended March 31, 2018, for purposes of Section 2(a)(3) of the 1940 Act were as follows: Affiliated issuer Shares held at 03/31/17 Shares purchased Shares sold Shares held at 03/31/18 Value at 03/31/18 Income Change in unrealized Net realized appreciation gain (loss) a (depreciation) BlackRock Cash Funds: Institutional, SL Agency Shares 17,333,984 (5,676,675) b 11,657,309 $11,657,309 $91,115 c $ (2,700) $ (5,462) BlackRock Cash Funds: Treasury, SL Agency Shares 188, ,713 b 642, ,665 5,732 $12,299,974 $96,847 $ (2,700) $ (5,462) a b c Includes realized capital gain distributions from an affiliated fund, if any. Net of purchases and sales. Includes the Fund s portion of securities lending income earned from the reinvestment of cash collateral from loaned securities (excluding collateral investment fees), net of fees and other payments to and from borrowers of securities. Futures Contracts (Note 5) Futures contracts outstanding as of March 31, 2018 were as follows: Description Number of contracts Expiration date Notional amount (000) Value / unrealized appreciation (depreciation) Long Contracts Dow Jones U.S. Real Estate 61 Jun 2018 $ 1,825 $ 3,484 Fair Value Measurements Various inputs are used in determining the fair value of financial instruments. For description of the input levels and information about the Fund s policy regarding valuation of financial instruments, see Note 1. The following table summarizes the value of the Fund s investments according to the fair value hierarchy as of March 31, The breakdown of the Fund s investments into major categories is disclosed in the Schedule of Investments above. Level 1 Level 2 Level 3 Total Investments Assets Common stocks $283,294,922 $ $ $283,294,922 Money market funds 12,299,974 12,299,974 Total $295,594,896 $ $ $295,594,896 Derivative financial instruments a Assets Futures contracts $ 3,484 $ $ $ 3,484 Total $ 3,484 $ $ $ 3,484 a Shown at the unrealized appreciation (depreciation) on the contracts. See notes to financial statements ishares A NNUAL R EPORT TO S HAREHOLDERS

15 Statements of Assets and Liabilities March 31, 2018 ishares Mortgage Real Estate ETF ishares Residential Real Estate ETF ASSETS Investments in securities, at cost: Unaffiliated $ 973,910,907 $308,973,410 Affiliated (Note 2) 189,585,463 12,299,974 Total cost of investments in securities $1,163,496,370 $321,273,384 Investments in securities, at fair value (including securities on loan a ) (Note 1): Unaffiliated $ 961,044,562 $283,294,922 Affiliated (Note 2) 190,938,481 12,299,974 Cash pledged to broker for futures contracts 746,000 62,000 Cash 321,314 2,950 Receivables: Dividends and interest 21,161,447 1,269,957 Capital shares sold 194,661 Total Assets 1,174,406, ,929,803 LIABILITIES Payables: Collateral for securities on loan (Note 1) 169,473,267 11,652,148 Investment advisory fees (Note 2) 399, ,797 Total Liabilities 169,872,465 11,766,945 NET ASSETS $1,004,534,000 $285,162,858 Net assets consist of: Paid-in capital $1,171,061,104 $319,796,523 Accumulated net realized loss (155,021,112) (8,958,661) Net unrealized depreciation (11,505,992) (25,675,004) NET ASSETS $1,004,534,000 $285,162,858 Shares outstanding b 23,650,000 4,950,000 Net asset value per share $ $ a Securities on loan with values of $166,124,625 and $11,383,380, respectively. See Note 1. b No par value, unlimited number of shares authorized. See notes to financial statements. F INANCIAL S TATEMENTS 15

16 Statements of Operations Year ended March 31, 2018 ishares Mortgage Real Estate ETF ishares Residential Real Estate ETF NET INVESTMENT INCOME Dividends unaffiliated $ 74,718,025 $ 11,569,112 Dividends affiliated (Note 2) 3,030,745 5,732 Interest unaffiliated 1,002 Securities lending income affiliated net (Note 2) 595,688 91,115 Total investment income 78,345,460 11,665,959 EXPENSES Investment advisory fees (Note 2) 5,962,548 1,812,129 Proxy fees 29,482 8,928 Total expenses 5,992,030 1,821,057 Net investment income 72,353,430 9,844,902 NET REALIZED AND UNREALIZED GAIN (LOSS) Net realized gain (loss) from: Investments unaffiliated (13,670,631) (4,027,223) Investments affiliated (Note 2) (1,973,305) (2,700) In-kind redemptions unaffiliated 44,807,414 13,240,331 In-kind redemptions affiliated (Note 2) 75,802 Futures contracts (760,836) (67,996) Net realized gain 28,478,444 9,142,412 Net change in unrealized appreciation/depreciation on: Investments unaffiliated (60,555,019) (38,080,647) Investments affiliated (Note 2) 1,326,839 (5,462) Futures contracts 7,335 3,484 Net change in unrealized appreciation/depreciation (59,220,845) (38,082,625) Net realized and unrealized loss (30,742,401) (28,940,213) NET INCREASE (DECREASE) IN NET ASSETS RESULTING FROM OPERATIONS $ 41,611,029 $(19,095,311) See notes to financial statements ishares A NNUAL R EPORT TO S HAREHOLDERS

17 Statements of Changes in Net Assets March 31, 2018 ishares Mortgage Real Estate ETF Year ended March 31, 2018 Year ended March 31, 2017 a ishares Residential Real Estate ETF Year ended March 31, 2018 Year ended March 31, 2017 INCREASE (DECREASE) IN NET ASSETS OPERATIONS: Net investment income $ 72,353,430 $ 93,416,102 $ 9,844,902 $ 9,972,820 Net realized gain (loss) 28,478,444 (31,248,062) 9,142,412 31,981,254 Net change in unrealized appreciation/depreciation (59,220,845) 217,658,656 (38,082,625) (46,149,171) Net increase (decrease) in net assets resulting from operations 41,611, ,826,696 (19,095,311) (4,195,097) DISTRIBUTIONS TO SHAREHOLDERS: From net investment income (94,617,547) (97,957,237) (13,004,642) (15,934,456) From net realized gain (2,582,882) Return of capital (21,874,760) (18,201,925) Total distributions to shareholders (116,492,307) (116,159,162) (13,004,642) (18,517,338) CAPITAL SHARE TRANSACTIONS: Proceeds from shares sold 268,586, ,195,726 70,011, ,638,096 Cost of shares redeemed (436,053,787) (276,493,194) (128,435,846) (160,459,370) Net increase (decrease) in net assets from capital share transactions (167,467,621) 320,702,532 (58,423,937) (821,274) INCREASE (DECREASE) IN NET ASSETS (242,348,899) 484,370,066 (90,523,890) (23,533,709) NET ASSETS Beginning of year 1,246,882, ,512, ,686, ,220,457 End of year $1,004,534,000 $1,246,882,899 $ 285,162,858 $ 375,686,748 SHARES ISSUED AND REDEEMED Shares sold 5,850,000 18,587,500 1,100,000 2,450,000 Shares redeemed (9,700,000) (10,800,000) (2,100,000) (2,550,000) Net increase (decrease) in shares outstanding (3,850,000) 7,787,500 (1,000,000) (100,000) a Share transactions reflect a one-for-four reverse stock split effective after the close of trading on November 4, See notes to financial statements. F INANCIAL S TATEMENTS 17

18 Financial Highlights (For a share outstanding throughout each period) Year ended Mar. 31, 2018 Year ended Mar. 31, 2017 a ishares Mortgage Real Estate ETF Period from May 1, 2015 to Mar. 31, 2016 a,b Year ended Apr. 30, 2015 a Year ended Apr. 30, 2014 a Year ended Apr. 30, 2013 a Net asset value, beginning of period $ $ $ $ $ $ Income from investment operations: Net investment income c Net realized and unrealized gain (loss) d (1.18) 7.34 (6.82) (1.11) (11.26) 7.48 Total from investment operations (3.30) 2.61 (5.42) Less distributions from: Net investment income (3.53) (3.53) (3.56) (4.76) (5.84) (6.96) Return of capital (0.81) (0.65) (0.92) (1.24) (1.88) Total distributions (4.34) (4.18) (4.48) (6.00) (7.72) (6.96) Net asset value, end of period $ $ $ $ $ $ Total return 3.10% 29.32% (7.09)% e 5.42% (7.41)% 26.63% Ratios/Supplemental data: Net assets, end of period (000s) $1,004,534 $1,246,883 $762,513 $1,216,004 $1,215,659 $1,270,072 Ratio of expenses to average net assets f 0.48% 0.48% 0.48% 0.48% 0.48% 0.48% Ratio of net investment income to average net assets f 5.82% 8.30% 9.31% 7.59% 11.74% 10.96% Portfolio turnover rate g 31% 34% 18% e 42% 35% 44% a Per share amounts reflect a one-for-four reverse stock split effective after the close of trading on November 4, b The Fund s fiscal year-end was changed from April 30 to March 31. c Based on average shares outstanding throughout each period. d The amounts reported for a share outstanding may not accord with the change in aggregate gains and losses in securities for the fiscal period due to the timing of capital share transactions in relation to the fluctuating market values of the Fund s underlying securities. e Not annualized. f Annualized for periods of less than one year. g Portfolio turnover rates exclude portfolio securities received or delivered as a result of processing capital share transactions in Creation Units. See notes to financial statements ishares A NNUAL R EPORT TO S HAREHOLDERS

19 Financial Highlights (For a share outstanding throughout each period) Year ended Mar. 31, 2018 ishares Residential Real Estate ETF Year ended Mar. 31, 2017 Period from May 1, 2015 to Mar. 31, 2016 a Year ended Apr. 30, 2015 Year ended Apr. 30, 2014 Year ended Apr. 30, 2013 Net asset value, beginning of period $ $ $ $ $ $ Income from investment operations: Net investment income b Net realized and unrealized gain (loss) c (4.94) (1.38) (1.97) 7.49 Total from investment operations (3.30) (0.61) 8.69 Less distributions from: Net investment income (2.23) (2.56) (2.09) (1.88) (1.81) (1.53) Net realized gain (0.42) (0.44) Total distributions (2.23) (2.98) (2.53) (1.88) (1.81) (1.53) Net asset value, end of period $ $ $ $ $ $ Total return (5.41)% 0.31% 16.35% d 16.93% (0.78)% 18.77% Ratios/Supplemental data: Net assets, end of period (000s) $285,163 $375,687 $399,220 $304,350 $261,296 $355,427 Ratio of expenses to average net assets e 0.48% 0.48% 0.48% 0.48% 0.48% 0.48% Ratio of net investment income to average net assets e 2.61% 2.37% 3.01% 2.55% 2.74% 2.44% Portfolio turnover rate f 19% 15% 17% d 21% 17% 14% a The Fund s fiscal year-end was changed from April 30 to March 31. b Based on average shares outstanding throughout each period. c The amounts reported for a share outstanding may not accord with the change in aggregate gains and losses in securities for the fiscal period due to the timing of capital share transactions in relation to the fluctuating market values of the Fund s underlying securities. d Not annualized. e Annualized for periods of less than one year. f Portfolio turnover rates exclude portfolio securities received or delivered as a result of processing capital share transactions in Creation Units. See notes to financial statements. F INANCIAL H IGHLIGHTS 19

20 Notes to Financial Statements ishares Trust (the Trust ) is registered under the Investment Company Act of 1940, as amended (the 1940 Act ), as an open-end management investment company. The Trust was established as a Delaware statutory trust pursuant to an Agreement and Declaration of Trust dated December 16, These financial statements relate only to the following funds (each, a Fund, and collectively, the Funds ): ishares ETF Mortgage Real Estate a Residential Real Estate b Diversification Classification Non-diversified Non-diversified a b Formerly the ishares Mortgage Real Estate Capped ETF. Formerly the ishares Residential Real Estate Capped ETF. The investment objective of each Fund is to seek investment results that correspond generally to the price and yield performance, before fees and expenses, of its underlying index. The investment adviser uses a passive or index approach to try to achieve each Fund s investment objective. Pursuant to the Trust s organizational documents, the Funds officers and trustees are indemnified against certain liabilities that may arise out of the performance of their duties to the Funds. Additionally, in the normal course of business, the Funds enter into contracts with service providers that contain general indemnification clauses. The Funds maximum exposure under these arrangements is unknown as this would involve future claims that may be made against the Funds that have not yet occurred. 1. SIGNIFICANT ACCOUNTING POLICIES The following significant accounting policies are consistently followed by each Fund in the preparation of its financial statements in conformity with accounting principles generally accepted in the United States of America ( U.S. GAAP ). The preparation of financial statements in conformity with U.S. GAAP requires management to make certain estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. Actual results could differ from those estimates. Each Fund is considered an investment company under U.S. GAAP and follows the accounting and reporting guidance applicable to investment companies. SECURITY VALUATION Each Fund s investments are valued at fair value each day that the Fund s listing exchange is open and, for financial reporting purposes, as of the report date should the reporting period end on a day that the Fund s listing exchange is not open. U.S. GAAP defines fair value as the price a fund would receive to sell an asset or pay to transfer a liability in an orderly transaction between market participants at the measurement date. The BlackRock Global Valuation Methodologies Committee (the Global Valuation Committee ) provides oversight of the valuation of investments for the Funds. The investments of each Fund are valued pursuant to policies and procedures developed by the Global Valuation Committee and approved by the Board of Trustees of the Trust (the Board ). Equity investments traded on a recognized securities exchange are valued at that day s last reported trade price or the official closing price, as applicable, on the exchange where the stock is primarily traded. Equity investments traded on a recognized exchange for which there were no sales on that day are valued at the last traded price ishares A NNUAL R EPORT TO S HAREHOLDERS

21 Notes to Financial Statements (Continued) Open-end U.S. mutual funds (including money market funds) are valued at that day s published net asset value ( NAV ). Futures contract notional values are determined based on that day s last reported settlement price on the exchange where the contract is traded. In the event that application of these methods of valuation results in a price for an investment which is deemed not to be representative of the fair value of such investment or if a price is not available, the investment will be valued by the Global Valuation Committee, in accordance with policies approved by the Board. The fair valuation approaches that may be utilized by the Global Valuation Committee to determine fair value include market approach, income approach and the cost approach. The valuation techniques used under these approaches take into consideration inputs that include but are not limited to (i) attributes specific to the investment; (ii) the principal market for the investment; (iii) the customary participants in the principal market for the investment; (iv) data assumptions by market participants for the investment, if reasonably available; (v) quoted prices for similar investments in active markets; and (vi) other inputs, such as future cash flows, interest rates, yield curves, volatilities, prepayment speeds, loss severities, credit risks and/or default rates. Valuations based on such inputs are reported to the Board on a quarterly basis. The Global Valuation Committee employs various methods for calibrating valuation approaches for investments where an active market does not exist, including regular due diligence of the Trust s pricing vendors, a regular review of key inputs and assumptions, transactional back-testing or disposition analysis to compare unrealized gains and losses to realized gains and losses, reviews of missing or stale prices, reviews of large movements in market values, and reviews of market related activity. Fair value pricing could result in a difference between the prices used to calculate a Fund s NAV and the prices used by the Fund s underlying index, which in turn could result in a difference between the Fund s performance and the performance of the Fund s underlying index. Various inputs are used in determining the fair value of financial instruments. Inputs may be based on independent market data ( observable inputs ) or they may be internally developed ( unobservable inputs ). These inputs to valuation techniques are categorized into a fair value hierarchy consisting of three broad levels for financial reporting purposes as follows: Level 1 Unadjusted quoted prices in active markets for identical assets or liabilities; Level 2 Inputs other than quoted prices included within Level 1 that are observable for the asset or liability either directly or indirectly, including quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not considered to be active, inputs other than quoted prices that are observable for the asset or liability (such as exchange rates, financing terms, interest rates, yield curves, volatilities, prepayment speeds, loss severities, credit risks and default rates) or other market-corroborated inputs; and Level 3 Unobservable inputs for the asset or liability based on the best information available in the circumstances, to the extent observable inputs are not available, including the Global Valuation Committee s assumptions used in determining the fair value of investments. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). Accordingly, the degree of judgement exercised in determining fair value is greatest for instruments categorized in Level 3. The inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, for disclosure purposes, the fair value hierarchy classification is determined based on the lowest level input that is significant to the fair value measurement in its entirety. The fair value hierarchy for each Fund s investments is included in its schedule of investments. N OTES TO F INANCIAL S TATEMENTS 21

22 Notes to Financial Statements (Continued) Changes in valuation techniques may result in transfers in or out of an assigned level within the fair value hierarchy. In accordance with the Trust s policy, transfers between different levels of the fair value hierarchy are deemed to have occurred as of the beginning of the reporting period. The categorization of values determined for financial instruments are based on the pricing transparency of the financial instruments and are not necessarily an indication of the risks associated with investing in those securities. SECURITY TRANSACTIONS AND INCOME RECOGNITION Security transactions are accounted for on trade date. Realized gains and losses on investment transactions are determined using the specific identification method. Dividend income and capital gain distributions, if any, are recognized on the ex-dividend date, net of any foreign taxes withheld at source. Any taxes withheld that are reclaimable from foreign tax authorities as of March 31, 2018 are reflected in tax reclaims receivable. Upon notification from issuers, some of the dividend income received from a real estate investment trust may be re-designated as a return of capital or capital gain. Non-cash dividends, if any, are recognized on the ex-dividend date and recorded as non-cash dividend income at fair value. Distributions received by the Funds may include a return of capital that is estimated by management. Such amounts are recorded as a reduction of the cost of investments or reclassified to capital gains. Interest income is accrued daily. DISTRIBUTIONS TO SHAREHOLDERS Dividends and distributions paid by each Fund are recorded on the ex-dividend dates. Distributions are determined on a tax basis and may differ from net investment income and net realized capital gains for financial reporting purposes. Dividends and distributions are paid in U.S. dollars and cannot be automatically reinvested in additional shares of the Funds. LOANS OF PORTFOLIO SECURITIES Each Fund may lend its investment securities to approved borrowers, such as brokers, dealers and other financial institutions. The borrower pledges and maintains with the Fund collateral consisting of cash, an irrevocable letter of credit issued by an approved bank, or securities issued or guaranteed by the U.S. government. The initial collateral received by each Fund is required to have a value of at least 102% of the current value of the loaned securities for securities traded on U.S. exchanges and a value of at least 105% for all other securities. The collateral is maintained thereafter at a value equal to at least 100% of the current value of the securities on loan. The market value of the loaned securities is determined at the close of each business day of the Funds. Any additional required collateral is delivered to the Funds and any excess collateral is returned by the Funds on the next business day. During the term of the loan, each Fund is entitled to all distributions made on or in respect of the loaned securities but does not receive interest income on securities received as collateral. Loans of securities are terminable at any time and the borrower, after notice, is required to return borrowed securities within the standard time period for settlement of securities transactions. Cash received as collateral for securities on loan may be reinvested in certain short-term instruments either directly on behalf of a fund or through one or more joint accounts or money market funds, including those managed by BlackRock Fund Advisors ( BFA ), the Funds investment adviser, or its affiliates. As of March 31, 2018, any securities on loan were collateralized by cash and/or U.S. government obligations. Cash collateral received was invested in money market funds managed by BFA and is disclosed in the schedules of investments. Any non-cash collateral received cannot be sold, re-invested or pledged by the Fund, except in the event of borrower default. The securities on loan for each Fund are also disclosed in its schedule of investments. The total value of any securities on loan as of March 31, 2018 and the total value of the related cash collateral are disclosed in the statements of assets and liabilities. Income earned by the Funds from securities lending is disclosed in the statements of operations ishares A NNUAL R EPORT TO S HAREHOLDERS