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iShares MBS ETF MBB | NASDAQ Semi-Annual Shareholder Report — August 31, 2026
This semi-annual shareholder report contains important information about iShares MBS ETF (the “Fund”) for the period of March 1, 2026 to August 31, 2026. You can find additional information about the Fund at blackrock.com/fundreports . You can also request this information by contacting us at 1-800-iShares (1-800-474-2737). What were the Fund costs for the last six months? (based on a hypothetical $10,000 investment)
Fund name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
$ 2 0.03 % (a)
Annualized. Key Fund statistics $.. 39,633,990,018............. 11,216........... 106...... %...
What did the Fund invest in? (as of August 31, 2026)
Issuer allocation
Issuer
Percent of Total Investments (a) 74.4....... %.... 23.8........ 1.7.... 0.1.....
Maturity allocation
Maturity
Percent of Total Investments (a) 0.3.......... %...... 3.7.......... 5.1......... 4.3.......... 28.0....... 52.7....... 5.9..... Excludes money market funds. Additional information If you wish to view additional information about the Fund, including but not limited to financial statements, the Fund’s prospectus, and proxy voting policies and procedures, please visit blackrock.com/fundreports . For proxy voting records, visit blackrock.com/proxyrecords .
iShares MBS ETF (a)
Net Assets $39,633,9............................................................................................................................................................................................................................ Number of Portfolio Holdings 11,216............................................................................................................................................................................................................................ Portfolio Turnover Rate 106%............................................................................................................................................................................................................................
Uniform Mortgage-Backed Securities 74.4%0.3%............................................................................................................................................................................................................................15 Years ...................................................................................................................................... Government National Mortgage Association 23.83.7............................................................................................................................................................................................................................510 Years ............................................................................................................................................... Federal Home Loan Mortgage Corp. 1.75.1............................................................................................................................................................................................................................1015 Years ................................................................................................................................. Federal National Mortgage Association 0.14.3............................................................................................................................................................................................................................1520 Years .....................................................................................................................................
................1-5 Years 0.3%.................................................................................................................................................................................................................................................................................................................................................................. ..................5-10 Years 3.7........................................................................................................................................................................................................................................................................................................................................................................... ....................10-15 Years 5.1............................................................................................................................................................................................................................................................................................................................................................. ....................15-20 Years 4.3................................................................................................................................................................................................................................................................................................................................................................. 20-25 Years 28.0............................................................................................................................................................................................................................ 25-30 Years 52.7............................................................................................................................................................................................................................ 30-35 Years 5.9............................................................................................................................................................................................................................ (a)
©2026 BlackRock, Inc. or its affiliates. All rights reserved. iSHARES and BLACKROCK are registered trademarks of BlackRock, Inc. or its affiliates. All other trademarks are those of their respective owners.
iShares MBS ETF Semi-Annual Shareholder Report — August 31, 2026 MBB-08/26-SAR
BNM1026U-6054652-19276558
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