Item A.1. Reporting period covered.

a. Report for period ending:	2021-02-28
b. Does this report cover a period of less than 12 months?	Yes No

Item B.1. Background information.

Item B.2. Address and telephone number of Registrant.

Item B.3. Location of books and records.

Item B.4. Initial of final filings.

a. Is this the first filing on this form by the Registrant?	Yes No
b. Is this the last filing on this form by the Registrant?	Yes No

Item B.5. Family of investment companies.

a. Is the Registrant part of a family of investment companies?

Yes No

Item B.6. Organization.

Item B.7. Securities Act registration.

Is the Registrant the issuer of a class of securities registered under the Securities Act of 1933 ("Securities Act")?

Yes No

Item B.8. Directors.

Director Record: 1
a. Full Name	John E. Kerrigan
b. CRD number, if any	000000000
c. Is the person an "interested person" of the Registrant as that term is defined in section 2(a)(19) of the Act (15 U.S.C. 80a-2(a)(19))?	Yes No
d. Investment Company Act file number of any other registered investment company for which the person also serves as a director (e.g., 811-)
File Number Record: 1
File Number Record:	811-22649
File Number Record: 2
File Number Record:	811-09102
Director Record: 2
a. Full Name	Richard L. Fagnani
b. CRD number, if any	000000000
c. Is the person an "interested person" of the Registrant as that term is defined in section 2(a)(19) of the Act (15 U.S.C. 80a-2(a)(19))?	Yes No
d. Investment Company Act file number of any other registered investment company for which the person also serves as a director (e.g., 811-)
File Number Record: 1
File Number Record:	811-09102
File Number Record: 2
File Number Record:	811-22649
Director Record: 3
a. Full Name	Robert S. Kapito
b. CRD number, if any	000000000
c. Is the person an "interested person" of the Registrant as that term is defined in section 2(a)(19) of the Act (15 U.S.C. 80a-2(a)(19))?	Yes No
d. Investment Company Act file number of any other registered investment company for which the person also serves as a director (e.g., 811-)
File Number Record: 1
File Number Record:	811-22649
File Number Record: 2
File Number Record:	811-09102
Director Record: 4
a. Full Name	Drew E. Lawton
b. CRD number, if any	001173631
c. Is the person an "interested person" of the Registrant as that term is defined in section 2(a)(19) of the Act (15 U.S.C. 80a-2(a)(19))?	Yes No
d. Investment Company Act file number of any other registered investment company for which the person also serves as a director (e.g., 811-)
File Number Record: 1
File Number Record:	811-09102
File Number Record: 2
File Number Record:	811-22649
Director Record: 5
a. Full Name	John E. Martinez
b. CRD number, if any	000000000
c. Is the person an "interested person" of the Registrant as that term is defined in section 2(a)(19) of the Act (15 U.S.C. 80a-2(a)(19))?	Yes No
d. Investment Company Act file number of any other registered investment company for which the person also serves as a director (e.g., 811-)
File Number Record: 1
File Number Record:	811-09102
File Number Record: 2
File Number Record:	811-22649
Director Record: 6
a. Full Name	Salim Ramji
b. CRD number, if any	004797124
c. Is the person an "interested person" of the Registrant as that term is defined in section 2(a)(19) of the Act (15 U.S.C. 80a-2(a)(19))?	Yes No
d. Investment Company Act file number of any other registered investment company for which the person also serves as a director (e.g., 811-)
File Number Record: 1
File Number Record:	811-09102
File Number Record: 2
File Number Record:	811-22649
Director Record: 7
a. Full Name	Madhav V. Rajan
b. CRD number, if any	000000000
c. Is the person an "interested person" of the Registrant as that term is defined in section 2(a)(19) of the Act (15 U.S.C. 80a-2(a)(19))?	Yes No
d. Investment Company Act file number of any other registered investment company for which the person also serves as a director (e.g., 811-)
File Number Record: 1
File Number Record:	811-09102
File Number Record: 2
File Number Record:	811-22649
Director Record: 8
a. Full Name	Jane D. Carlin
b. CRD number, if any	001279982
c. Is the person an "interested person" of the Registrant as that term is defined in section 2(a)(19) of the Act (15 U.S.C. 80a-2(a)(19))?	Yes No
d. Investment Company Act file number of any other registered investment company for which the person also serves as a director (e.g., 811-)
File Number Record: 1
File Number Record:	811-22649
File Number Record: 2
File Number Record:	811-09102
Director Record: 9
a. Full Name	Cecilia H. Herbert
b. CRD number, if any	000000000
c. Is the person an "interested person" of the Registrant as that term is defined in section 2(a)(19) of the Act (15 U.S.C. 80a-2(a)(19))?	Yes No
d. Investment Company Act file number of any other registered investment company for which the person also serves as a director (e.g., 811-)
File Number Record: 1
File Number Record:	811-22649
File Number Record: 2
File Number Record:	811-23362
File Number Record: 3
File Number Record:	811-09102

Item B.9. Chief compliance officer.

Chief compliance officer Record: 1
a. Full Name	Charles Park
b. CRD Number, if any	000000000
c. Street Address 1	55 East 52nd Street
Street Address 2
d. City	New York
e. State, if applicable	NEW YORK
f. Foreign country, if applicable	UNITED STATES OF AMERICA
g. Zip code and zip code extension, or foreign postal code	10055
h. Telephone number (including country code if foreign)	XXXXXX
i. Has the chief compliance officer changed since the last filing?	Yes No

Item B.10. Matters for security holder vote.

Were any matters submitted by the Registrant for its security holders' vote during the reporting period?

Yes No

Item B.11. Legal proceeding.

a. Have there been any material legal proceedings, other than routine litigation incidental to the business, to which the Registrant or any of its subsidiaries was a party or of which any of their property was the subject during the reporting period?

Yes No

b. Has any proceeding previously reported been terminated?

Yes No

Item B.12. Fidelity bond and insurance (management investment companies only).

a. Were any claims with respect to the Registrant filed under a fidelity bond (including, but not limited to, the fidelity insuring agreement of the bond) during the reporting period?	Yes No

Item B.13. Directors and officers/errors and omissions insurance (management investment companies only).

a. Are the Registrant's officers or directors covered in their capacities as officers or directors under any directors and officers/errors and omissions insurance policy owned by the Registrant or anyone else?	Yes No
i. If yes, were any claims filed under the policy during the reporting period with respect to the Registrant?	Yes No

Item B.14. Provision of financial support.

Did an affiliated person, promoter, or principal underwriter of the Registrant, or an affiliated person of such a person, provide any form of financial support to the Registrant during the reporting period?

Yes No

Item B.15. Exemptive orders.

a. During the reporting period, did the Registrant rely on any orders from the Commission granting an exemption from one or more provisions of the Act, Securities Act or Exchange Act?	Yes No
Release number Record: 1
i. If yes, provide below the release number for each order	IC-24451
Release number Record: 2
i. If yes, provide below the release number for each order	IC-32268
Release number Record: 3
i. If yes, provide below the release number for each order	IC-29172
Release number Record: 4
i. If yes, provide below the release number for each order	IC-27417
Release number Record: 5
i. If yes, provide below the release number for each order	IC-26175
Release number Record: 6
i. If yes, provide below the release number for each order	IC-25111
Release number Record: 7
i. If yes, provide below the release number for each order	IC-27661
Release number Record: 8
i. If yes, provide below the release number for each order	IC-24452
Release number Record: 9
i. If yes, provide below the release number for each order	IC-25878
Release number Record: 10
i. If yes, provide below the release number for each order	IC-26606
Release number Record: 11
i. If yes, provide below the release number for each order	IC-25622
Release number Record: 12
i. If yes, provide below the release number for each order	IC-26626

Item B.16. Principal underwriters.

Principal underwriter Record: 1
i. Full name	BlackRock Investments, LLC
ii. SEC file number (e.g., 8-)	8-48436
iii. CRD number	000038642
iv. LEI, if any	54930061FBHCKXL2G714
v. State, if applicable	NEW YORK
vi. Foreign country, if applicable	UNITED STATES OF AMERICA
vii. Is the principal underwriter an affiliated person of the Registrant, or its investment adviser(s) or depositor?	Yes No
b. Have any principal underwriters been hired or terminated during the reporting period?	Yes No

Item B.17. Independent public accountant.

f. Has the independent public accountant changed since the last filing?

Yes No

Item B.18. Report on internal control (management investment companies only).

For the reporting period, did an independent public accountant's report on internal control note any material weaknesses?

Yes No

Item B.19. Audit opinion.

For the reporting period, did an independent public accountant issue an opinion other than an unqualified opinion with respect to its audit of the Registrant's financial statements?

Yes No

Item B.20. Change in valuation methods.

Have there been material changes in the method of valuation (e.g., change from use of bid price to mid price for fixed income securities or change in trigger threshold for use of fair value factors on international equity securities) of the Registrant's assets during the reporting period?

Yes No

Item B.21. Change in accounting principles and practices.

Have there been any changes in accounting principles or practices, or any change in the method of applying any such accounting principles or practices, which will materially affect the financial statements filed or to be filed for the current year with the Commission and which has not been previously reported?

Yes No

Item B.22. Net asset value error corrections (open-end management investment companies only).

a. During the reporting period, were any payments made to shareholders or shareholder accounts reprocessed as a result of an error in calculating the Registrant's net asset value (or net asset value per share)?

Yes No

Item B.23. Rule 19a-1 notice (management investment companies only).

During the reporting period, did the Registrant pay any dividend or make any distribution in the nature of a dividend payment, required to be accompanied by a written statement pursuant to section 19(a) of the Act (15 U.S.C. 80a-19(a)) and rule 19a-1 thereunder (17 CFR 270.19a-1)?

Yes No

Item C.1. Background information.

a. Full Name of the Fund	iShares Agency Bond ETF
b. Series identication number, if any	S000023506
c. LEI	54930076RN5EDP4FSR30
d. Is this the first filing on this form by the Fund?	Yes No

Item C.2. Classes of open-end management investment companies.

Item C.3. Type of fund.

a. Exchange-Traded Fund or Exchange-Traded Managed Fund or offers a Class that itself is an Exchange-Traded Fund or Exchange-Traded Managed Fund        i.     Exchange-Traded Fund        ii.    Exchange-Traded Managed Fund   b.   Index Fund  i. Is the index whose performance the Fund tracks, constructed: 1. By an affiliated person of the fund? Yes No 2. Exclusively for the fund? Yes No ii. Provide the annualized difference between the Fund's total return during the reporting period and the index's return during the reporting period (i.e., the Fund's total return less the index's return): 1. Before Fund fees and expenses: 0.62000000  2. After Fund fees and expenses (i.e., net asset value): 0.42000000  iii. Provide the annualized standard deviation of the daily difference between the Fund's total return and the index's return during the reporting period: 1. Before Fund fees and expenses: 0.50000000  2. After Fund fees and expenses (i.e., net asset value): 0.50000000   c.    Seeks to achieve performance results that are a multiple of a benchmark, the inverse of a benchmark, or a multiple of the inverse of a benchmark   d.    Interval Fund   e.    Fund of Funds   f.     Master-Feeder Fund   g.    Money Market Fund   h.    Target Date Fund   i.     Underlying fund to a variable annuity or variable life insurance contract          N/A

Item C.4. Diversification.

Does the Fund seek to operate as a “non-diversified company” as such term is defined in section 5(b)(2) of the Act (15 U.S.C. 80a- 5(b) (2))?

Yes No

Item C.5. Investments in certain foreign corporations.

a. Does the fund invest in a controlled foreign corporation for the purpose of investing in certain types of instruments such as, but not limited to, commodities?

Yes No

Item C.6. Securities lending.

a. Is the Fund authorized to engage in securities lending transactions?	Yes No
b. Did the Fund lend any of its securities during the reporting period?	Yes No

1. The Fund (or its securities lending agent) liquidated collateral pledged to secure the loaned securities?	Yes No
2. The Fund was otherwise adversely impacted?	Yes No

Securities Lending Record: 1
i. Full name of securities lending agent	BlackRock Institutional Trust Company, National Association
ii. LEI, if any	549300RK1FB0VMTPD087
iii. Is the securities lending agent an affiliated person, or an affiliated person of an affiliated person, of the Fund?	Yes No
iv. Does the securities lending agent or any other entity indemnify the fund against borrower default on loans administered by this agent?	Yes No

vi. Did the Fund exercise its indemnification rights during the reporting period?

Yes No

Collateral Managers Record: 1
i. Full name of cash collateral manager:	BlackRock Fund Advisors
ii. LEI, if any:	549300YOOGP0Y1M95C20
iii. Is the cash collateral manager an affiliated person, or an affiliated person of an affiliated person, of a securities lending agent retained by the Fund?	Yes No
iv. Is the cash collateral manager an affiliated person, or an affiliated person of an affiliated person, of the Fund?	Yes No

e. Types of payments made to one or more securities lending agents and cash collateral managers (check all that apply):	i. Revenue sharing split   ii. Non-revenue sharing split (other than administrative fee)    iii. Administrative fee   iv. Cash collateral reinvestment fee   v. Indemnification fee   vi. Other     N/A
If other, describe:	Rebates paid to borrowers
f. Provide the monthly average of the value of portfolio securities on loan during the reporting period	459,907.00000000
g. Provide the net income from securities lending activities	207.00000000

Item C.7. Reliance on certain rules.

Did the Fund rely on any of the following rules under the Act during the reporting period? (check all that apply)

a. Rule 10f-3 (17 CFR 270.10f-3)    b. Rule 12d1-1 (17 CFR 270.12d1-1)   c. Rule 15a-4 (17 CFR 270.15a-4)    d. Rule 17a-6 (17 CFR 270.17a-6)    e. Rule 17a-7 (17 CFR 270.17a-7)   f. Rule 17a-8 (17 CFR 270.17a-8)   g. Rule 17e-1 (17 CFR 270.17e-1)   h. Rule 22d-1 (17 CFR 270.22d-1)   i. Rule 23c-1 (17 CFR 270.23c-1)    j. Rule 32a-4 (17 CFR 270.32a-4)   k. Rule 6c-11 (17 CFR 270.6c-11)   N/A

Item C.8. Expense limitations.

a. Did the Fund have an expense limitation arrangement in place during the reporting period?	Yes No
b. Were any expenses of the Fund reduced or waived pursuant to an expense limitation arrangement during the reporting period?	Yes No
c. Are the fees waived subject to recoupment?	Yes No
d. Were any expenses previously waived recouped during the period?	Yes No

Item C.9. Investment advisers.

Investment Advisers Record: 1
i. Full name	BlackRock Fund Advisors
ii. SEC file number ( e.g., 801- )	801-22609
iii.CRD number	000105247
iv. LEI, if any	549300YOOGP0Y1M95C20
v. State, if applicable	CALIFORNIA
vi. Foreign country, if applicable	UNITED STATES OF AMERICA
vii. Was the investment adviser hired during the reporting period?	Yes No

i. Full name
ii. SEC file number ( e.g., 801- ), if applicable
iii. CRD number
iv. LEI, if any
v. State, if applicable
vi. Foreign country, if applicable
vii. Is the sub-adviser an affiliated person of the Fund's investment adviser(s)?	Yes No
viii. Was the sub-adviser hired during the reporting period?	Yes No

Item C.10. Transfer agents.

Transfer Agents Record: 1
i. Full name	State Street Bank and Trust Company
ii.SEC file number ( e.g., 84- or 85- )	85-05003
iii. LEI, if any	571474TGEMMWANRLN572
iv. State, if applicable	MASSACHUSETTS
v. Foreign country, if applicable	UNITED STATES OF AMERICA
vi. Is the transfer agent an affiliated person of the Fund or its investment adviser(s)?	Yes No
vii. Is the transfer agent a sub-transfer agent?	Yes No

b. Has a transfer agent been hired or terminated during the reporting period?

Yes No

Item C.11. Pricing services.

Pricing Services Record: 1
i. Full name	Refinitiv US Holdings Inc.
ii. LEI, if any, or provide and describe other identifying number	549300NF240HXJO7N016
Description of other identifying number
iii. State, if applicable	NEW YORK
iv. Foreign country, if applicable	UNITED STATES OF AMERICA
v. Is the pricing service an affiliated person of the Fund or its investment adviser(s)?	Yes No
Pricing Services Record: 2
i. Full name	IHS Markit Ltd.
ii. LEI, if any, or provide and describe other identifying number	549300HLPTRASHS0E726
Description of other identifying number
iii. State, if applicable
iv. Foreign country, if applicable	UNITED KINGDOM OF GREAT BRITAIN AND NORTHERN IRELAND
v. Is the pricing service an affiliated person of the Fund or its investment adviser(s)?	Yes No
Pricing Services Record: 3
i. Full name	Bloomberg L.P.
ii. LEI, if any, or provide and describe other identifying number	549300B56MD0ZC402L06
Description of other identifying number
iii. State, if applicable	NEW YORK
iv. Foreign country, if applicable	UNITED STATES OF AMERICA
v. Is the pricing service an affiliated person of the Fund or its investment adviser(s)?	Yes No
Pricing Services Record: 4
i. Full name	ICE Data Services, Inc.
ii. LEI, if any, or provide and describe other identifying number	13-3668779
Description of other identifying number	Tax ID
iii. State, if applicable	NEW YORK
iv. Foreign country, if applicable	UNITED STATES OF AMERICA
v. Is the pricing service an affiliated person of the Fund or its investment adviser(s)?	Yes No

b. Was a pricing service hired or terminated during the reporting period?

Yes No

Item C.12. Custodians.

Custodians Record: 1
i. Full name	State Street Bank and Trust Company
ii. LEI, if any	571474TGEMMWANRLN572
iii. State, if applicable	MASSACHUSETTS
iv. Foreign country, if applicable	UNITED STATES OF AMERICA
v. Is the custodian an affiliated person of the Fund or its investment adviser(s)?	Yes No
vi. Is the custodian a sub-custodian?	Yes No
vii. With respect to the custodian, check below to indicate the type of custody:	1.Bank - section 17(f)(1) (15 U.S.C. 80a-17(f)(1)) 2.Member national securities exchange - rule 17f-1 (17 CFR 270.17f-1) 3.Self - rule 17f-2 (17 CFR 270.17f-2) 4.Securities depository - rule 17f-4 (17 CFR 270.17f-4) 5.Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) 6.Futures commission merchants and commodity clearing organizations - rule 17f-6 (17 CFR 270.17f-6) 7.Foreign securities depository - rule 17f-7 (17 CFR 270.17f-7) 8.Insurance company sponsor - rule 26a-2 (17 CFR 270.26a-2) 9.Other
Custodians Record: 2
i. Full name	BofA Securities, Inc.
ii. LEI, if any	549300HN4UKV1E2R3U73
iii. State, if applicable	NEW YORK
iv. Foreign country, if applicable	UNITED STATES OF AMERICA
v. Is the custodian an affiliated person of the Fund or its investment adviser(s)?	Yes No
vi. Is the custodian a sub-custodian?	Yes No
vii. With respect to the custodian, check below to indicate the type of custody:	1.Bank - section 17(f)(1) (15 U.S.C. 80a-17(f)(1)) 2.Member national securities exchange - rule 17f-1 (17 CFR 270.17f-1) 3.Self - rule 17f-2 (17 CFR 270.17f-2) 4.Securities depository - rule 17f-4 (17 CFR 270.17f-4) 5.Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) 6.Futures commission merchants and commodity clearing organizations - rule 17f-6 (17 CFR 270.17f-6) 7.Foreign securities depository - rule 17f-7 (17 CFR 270.17f-7) 8.Insurance company sponsor - rule 26a-2 (17 CFR 270.26a-2) 9.Other

b. Has a custodian been hired or terminated during the reporting period?*

Yes No

Item C.13. Shareholder servicing agents.

i. Full name
ii. LEI, if any, or provide and describe other identifying number
Description of other identifying number
iii. State, if applicable
iv. Foreign country, if applicable
v. Is the shareholder servicing agent an affiliated person of the Fund or its investment adviser(s)?	Yes No
vi. Is the shareholder servicing agent a sub-shareholder servicing agent?	Yes No

b. Has a shareholder servicing agent been hired or terminated during the reporting period?

Yes No

Item C.14. Administrators.

Administrators Record: 1
i. Full name	State Street Bank and Trust Company
ii. LEI, if any, or other identifying number	571474TGEMMWANRLN572
Description of other identifying number
iii. State, if applicable	MASSACHUSETTS
iv. Foreign country, if applicable	UNITED STATES OF AMERICA
v. Is the administrator an affiliated person of the Fund or its investment adviser(s)?	Yes No
vi. Is the administrator a sub-administrator?	Yes No

b.Has a third-party administrator been hired or terminated during the reporting period?

Yes No

Item C.15. Affiliated broker-dealers.

Item C.16. Brokers.

Item C.17. Principal transactions.

Item C.18. Payments for brokerage and research.

During the reporting period, did the Fund pay commissions to broker-dealers for "brokerage and research services" within the meaning of section 28(e) of the Exchange Act (15 U.S.C. 78bb)?

Yes No

Item C.19. Average net assets.

Item C.20. Lines of credit, interfund lending and interfund borrowing.

a. Does the Fund have available a line of credit?

Yes No

b. Did the Fund engage in interfund lending?	Yes No

c.Did the Fund engage in interfund borrowing?	Yes No

Item C.21. Swing pricing.

a. Did the Fund (if not a Money Market Fund, Exchange-Traded Fund, or Exchange-Traded Managed Fund) engage in swing pricing?	Yes No

Item C.1. Background information.

a. Full Name of the Fund	iShares 1-5 Year Investment Grade Corporate Bond ETF
b. Series identication number, if any	S000013697
c. LEI	549300T14S5IX7V5T008
d. Is this the first filing on this form by the Fund?	Yes No

Item C.2. Classes of open-end management investment companies.

Item C.3. Type of fund.

a. Exchange-Traded Fund or Exchange-Traded Managed Fund or offers a Class that itself is an Exchange-Traded Fund or Exchange-Traded Managed Fund        i.     Exchange-Traded Fund        ii.    Exchange-Traded Managed Fund   b.   Index Fund  i. Is the index whose performance the Fund tracks, constructed: 1. By an affiliated person of the fund? Yes No 2. Exclusively for the fund? Yes No ii. Provide the annualized difference between the Fund's total return during the reporting period and the index's return during the reporting period (i.e., the Fund's total return less the index's return): 1. Before Fund fees and expenses: -0.32000000  2. After Fund fees and expenses (i.e., net asset value): -0.38000000  iii. Provide the annualized standard deviation of the daily difference between the Fund's total return and the index's return during the reporting period: 1. Before Fund fees and expenses: 0.28000000  2. After Fund fees and expenses (i.e., net asset value): 0.28000000   c.    Seeks to achieve performance results that are a multiple of a benchmark, the inverse of a benchmark, or a multiple of the inverse of a benchmark   d.    Interval Fund   e.    Fund of Funds   f.     Master-Feeder Fund   g.    Money Market Fund   h.    Target Date Fund   i.     Underlying fund to a variable annuity or variable life insurance contract          N/A

Item C.4. Diversification.

Does the Fund seek to operate as a “non-diversified company” as such term is defined in section 5(b)(2) of the Act (15 U.S.C. 80a- 5(b) (2))?

Yes No

Item C.5. Investments in certain foreign corporations.

a. Does the fund invest in a controlled foreign corporation for the purpose of investing in certain types of instruments such as, but not limited to, commodities?

Yes No

Item C.6. Securities lending.

a. Is the Fund authorized to engage in securities lending transactions?	Yes No
b. Did the Fund lend any of its securities during the reporting period?	Yes No

1. The Fund (or its securities lending agent) liquidated collateral pledged to secure the loaned securities?	Yes No
2. The Fund was otherwise adversely impacted?	Yes No

Securities Lending Record: 1
i. Full name of securities lending agent	BlackRock Institutional Trust Company, National Association
ii. LEI, if any	549300RK1FB0VMTPD087
iii. Is the securities lending agent an affiliated person, or an affiliated person of an affiliated person, of the Fund?	Yes No
iv. Does the securities lending agent or any other entity indemnify the fund against borrower default on loans administered by this agent?	Yes No

vi. Did the Fund exercise its indemnification rights during the reporting period?

Yes No

Collateral Managers Record: 1
i. Full name of cash collateral manager:	BlackRock Fund Advisors
ii. LEI, if any:	549300YOOGP0Y1M95C20
iii. Is the cash collateral manager an affiliated person, or an affiliated person of an affiliated person, of a securities lending agent retained by the Fund?	Yes No
iv. Is the cash collateral manager an affiliated person, or an affiliated person of an affiliated person, of the Fund?	Yes No

e. Types of payments made to one or more securities lending agents and cash collateral managers (check all that apply):	i. Revenue sharing split   ii. Non-revenue sharing split (other than administrative fee)    iii. Administrative fee   iv. Cash collateral reinvestment fee   v. Indemnification fee   vi. Other     N/A
If other, describe:	Rebates paid to borrowers
f. Provide the monthly average of the value of portfolio securities on loan during the reporting period	765,823,971.00000000
g. Provide the net income from securities lending activities	3,141,422.00000000

Item C.7. Reliance on certain rules.

Did the Fund rely on any of the following rules under the Act during the reporting period? (check all that apply)

a. Rule 10f-3 (17 CFR 270.10f-3)    b. Rule 12d1-1 (17 CFR 270.12d1-1)   c. Rule 15a-4 (17 CFR 270.15a-4)    d. Rule 17a-6 (17 CFR 270.17a-6)    e. Rule 17a-7 (17 CFR 270.17a-7)   f. Rule 17a-8 (17 CFR 270.17a-8)   g. Rule 17e-1 (17 CFR 270.17e-1)   h. Rule 22d-1 (17 CFR 270.22d-1)   i. Rule 23c-1 (17 CFR 270.23c-1)    j. Rule 32a-4 (17 CFR 270.32a-4)   k. Rule 6c-11 (17 CFR 270.6c-11)   N/A

Item C.8. Expense limitations.

a. Did the Fund have an expense limitation arrangement in place during the reporting period?	Yes No
b. Were any expenses of the Fund reduced or waived pursuant to an expense limitation arrangement during the reporting period?	Yes No
c. Are the fees waived subject to recoupment?	Yes No
d. Were any expenses previously waived recouped during the period?	Yes No

Item C.9. Investment advisers.

Investment Advisers Record: 1
i. Full name	BlackRock Fund Advisors
ii. SEC file number ( e.g., 801- )	801-22609
iii.CRD number	000105247
iv. LEI, if any	549300YOOGP0Y1M95C20
v. State, if applicable	CALIFORNIA
vi. Foreign country, if applicable	UNITED STATES OF AMERICA
vii. Was the investment adviser hired during the reporting period?	Yes No

i. Full name
ii. SEC file number ( e.g., 801- ), if applicable
iii. CRD number
iv. LEI, if any
v. State, if applicable
vi. Foreign country, if applicable
vii. Is the sub-adviser an affiliated person of the Fund's investment adviser(s)?	Yes No
viii. Was the sub-adviser hired during the reporting period?	Yes No

Item C.10. Transfer agents.

Transfer Agents Record: 1
i. Full name	State Street Bank and Trust Company
ii.SEC file number ( e.g., 84- or 85- )	85-05003
iii. LEI, if any	571474TGEMMWANRLN572
iv. State, if applicable	MASSACHUSETTS
v. Foreign country, if applicable	UNITED STATES OF AMERICA
vi. Is the transfer agent an affiliated person of the Fund or its investment adviser(s)?	Yes No
vii. Is the transfer agent a sub-transfer agent?	Yes No

b. Has a transfer agent been hired or terminated during the reporting period?

Yes No

Item C.11. Pricing services.

Pricing Services Record: 1
i. Full name	Bloomberg L.P.
ii. LEI, if any, or provide and describe other identifying number	549300B56MD0ZC402L06
Description of other identifying number
iii. State, if applicable	NEW YORK
iv. Foreign country, if applicable	UNITED STATES OF AMERICA
v. Is the pricing service an affiliated person of the Fund or its investment adviser(s)?	Yes No
Pricing Services Record: 2
i. Full name	ICE Data Services, Inc.
ii. LEI, if any, or provide and describe other identifying number	13-3668779
Description of other identifying number	Tax ID
iii. State, if applicable	NEW YORK
iv. Foreign country, if applicable	UNITED STATES OF AMERICA
v. Is the pricing service an affiliated person of the Fund or its investment adviser(s)?	Yes No
Pricing Services Record: 3
i. Full name	Refinitiv US Holdings Inc.
ii. LEI, if any, or provide and describe other identifying number	549300NF240HXJO7N016
Description of other identifying number
iii. State, if applicable	NEW YORK
iv. Foreign country, if applicable	UNITED STATES OF AMERICA
v. Is the pricing service an affiliated person of the Fund or its investment adviser(s)?	Yes No
Pricing Services Record: 4
i. Full name	IHS Markit Ltd.
ii. LEI, if any, or provide and describe other identifying number	549300HLPTRASHS0E726
Description of other identifying number
iii. State, if applicable
iv. Foreign country, if applicable	UNITED KINGDOM OF GREAT BRITAIN AND NORTHERN IRELAND
v. Is the pricing service an affiliated person of the Fund or its investment adviser(s)?	Yes No

b. Was a pricing service hired or terminated during the reporting period?

Yes No

Item C.12. Custodians.

Custodians Record: 1
i. Full name	State Street Bank and Trust Company
ii. LEI, if any	571474TGEMMWANRLN572
iii. State, if applicable	MASSACHUSETTS
iv. Foreign country, if applicable	UNITED STATES OF AMERICA
v. Is the custodian an affiliated person of the Fund or its investment adviser(s)?	Yes No
vi. Is the custodian a sub-custodian?	Yes No
vii. With respect to the custodian, check below to indicate the type of custody:	1.Bank - section 17(f)(1) (15 U.S.C. 80a-17(f)(1)) 2.Member national securities exchange - rule 17f-1 (17 CFR 270.17f-1) 3.Self - rule 17f-2 (17 CFR 270.17f-2) 4.Securities depository - rule 17f-4 (17 CFR 270.17f-4) 5.Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) 6.Futures commission merchants and commodity clearing organizations - rule 17f-6 (17 CFR 270.17f-6) 7.Foreign securities depository - rule 17f-7 (17 CFR 270.17f-7) 8.Insurance company sponsor - rule 26a-2 (17 CFR 270.26a-2) 9.Other
Custodians Record: 2
i. Full name	SG Americas Securities, LLC
ii. LEI, if any	549300F35UE0BOM1WJ55
iii. State, if applicable	NEW YORK
iv. Foreign country, if applicable	UNITED STATES OF AMERICA
v. Is the custodian an affiliated person of the Fund or its investment adviser(s)?	Yes No
vi. Is the custodian a sub-custodian?	Yes No
vii. With respect to the custodian, check below to indicate the type of custody:	1.Bank - section 17(f)(1) (15 U.S.C. 80a-17(f)(1)) 2.Member national securities exchange - rule 17f-1 (17 CFR 270.17f-1) 3.Self - rule 17f-2 (17 CFR 270.17f-2) 4.Securities depository - rule 17f-4 (17 CFR 270.17f-4) 5.Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) 6.Futures commission merchants and commodity clearing organizations - rule 17f-6 (17 CFR 270.17f-6) 7.Foreign securities depository - rule 17f-7 (17 CFR 270.17f-7) 8.Insurance company sponsor - rule 26a-2 (17 CFR 270.26a-2) 9.Other
Custodians Record: 3
i. Full name	Euroclear Bank
ii. LEI, if any	549300OZ46BRLZ8Y6F65
iii. State, if applicable
iv. Foreign country, if applicable	BELGIUM
v. Is the custodian an affiliated person of the Fund or its investment adviser(s)?	Yes No
vi. Is the custodian a sub-custodian?	Yes No
vii. With respect to the custodian, check below to indicate the type of custody:	1.Bank - section 17(f)(1) (15 U.S.C. 80a-17(f)(1)) 2.Member national securities exchange - rule 17f-1 (17 CFR 270.17f-1) 3.Self - rule 17f-2 (17 CFR 270.17f-2) 4.Securities depository - rule 17f-4 (17 CFR 270.17f-4) 5.Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) 6.Futures commission merchants and commodity clearing organizations - rule 17f-6 (17 CFR 270.17f-6) 7.Foreign securities depository - rule 17f-7 (17 CFR 270.17f-7) 8.Insurance company sponsor - rule 26a-2 (17 CFR 270.26a-2) 9.Other

b. Has a custodian been hired or terminated during the reporting period?*

Yes No

Item C.13. Shareholder servicing agents.

i. Full name
ii. LEI, if any, or provide and describe other identifying number
Description of other identifying number
iii. State, if applicable
iv. Foreign country, if applicable
v. Is the shareholder servicing agent an affiliated person of the Fund or its investment adviser(s)?	Yes No
vi. Is the shareholder servicing agent a sub-shareholder servicing agent?	Yes No

b. Has a shareholder servicing agent been hired or terminated during the reporting period?

Yes No

Item C.14. Administrators.

Administrators Record: 1
i. Full name	State Street Bank and Trust Company
ii. LEI, if any, or other identifying number	571474TGEMMWANRLN572
Description of other identifying number
iii. State, if applicable	MASSACHUSETTS
iv. Foreign country, if applicable	UNITED STATES OF AMERICA
v. Is the administrator an affiliated person of the Fund or its investment adviser(s)?	Yes No
vi. Is the administrator a sub-administrator?	Yes No

b.Has a third-party administrator been hired or terminated during the reporting period?

Yes No

Item C.15. Affiliated broker-dealers.

Item C.16. Brokers.

Item C.17. Principal transactions.

Item C.18. Payments for brokerage and research.

During the reporting period, did the Fund pay commissions to broker-dealers for "brokerage and research services" within the meaning of section 28(e) of the Exchange Act (15 U.S.C. 78bb)?

Yes No

Item C.19. Average net assets.

Item C.20. Lines of credit, interfund lending and interfund borrowing.

a. Does the Fund have available a line of credit?

Yes No

b. Did the Fund engage in interfund lending?	Yes No

c.Did the Fund engage in interfund borrowing?	Yes No

Item C.21. Swing pricing.

a. Did the Fund (if not a Money Market Fund, Exchange-Traded Fund, or Exchange-Traded Managed Fund) engage in swing pricing?	Yes No

Item C.1. Background information.

a. Full Name of the Fund	iShares 10-20 Year Treasury Bond ETF
b. Series identication number, if any	S000013696
c. LEI	549300MH5J7BUV0VS287
d. Is this the first filing on this form by the Fund?	Yes No

Item C.2. Classes of open-end management investment companies.

Item C.3. Type of fund.

a. Exchange-Traded Fund or Exchange-Traded Managed Fund or offers a Class that itself is an Exchange-Traded Fund or Exchange-Traded Managed Fund        i.     Exchange-Traded Fund        ii.    Exchange-Traded Managed Fund   b.   Index Fund  i. Is the index whose performance the Fund tracks, constructed: 1. By an affiliated person of the fund? Yes No 2. Exclusively for the fund? Yes No ii. Provide the annualized difference between the Fund's total return during the reporting period and the index's return during the reporting period (i.e., the Fund's total return less the index's return): 1. Before Fund fees and expenses: 1.29000000  2. After Fund fees and expenses (i.e., net asset value): 1.14000000  iii. Provide the annualized standard deviation of the daily difference between the Fund's total return and the index's return during the reporting period: 1. Before Fund fees and expenses: 1.86000000  2. After Fund fees and expenses (i.e., net asset value): 1.86000000   c.    Seeks to achieve performance results that are a multiple of a benchmark, the inverse of a benchmark, or a multiple of the inverse of a benchmark   d.    Interval Fund   e.    Fund of Funds   f.     Master-Feeder Fund   g.    Money Market Fund   h.    Target Date Fund   i.     Underlying fund to a variable annuity or variable life insurance contract          N/A

Item C.4. Diversification.

Does the Fund seek to operate as a “non-diversified company” as such term is defined in section 5(b)(2) of the Act (15 U.S.C. 80a- 5(b) (2))?

Yes No

Item C.5. Investments in certain foreign corporations.

a. Does the fund invest in a controlled foreign corporation for the purpose of investing in certain types of instruments such as, but not limited to, commodities?

Yes No

Item C.6. Securities lending.

a. Is the Fund authorized to engage in securities lending transactions?	Yes No
b. Did the Fund lend any of its securities during the reporting period?	Yes No

1. The Fund (or its securities lending agent) liquidated collateral pledged to secure the loaned securities?	Yes No
2. The Fund was otherwise adversely impacted?	Yes No

Securities Lending Record: 1
i. Full name of securities lending agent	BlackRock Institutional Trust Company, National Association
ii. LEI, if any	549300RK1FB0VMTPD087
iii. Is the securities lending agent an affiliated person, or an affiliated person of an affiliated person, of the Fund?	Yes No
iv. Does the securities lending agent or any other entity indemnify the fund against borrower default on loans administered by this agent?	Yes No

vi. Did the Fund exercise its indemnification rights during the reporting period?

Yes No

Collateral Managers Record: 1
i. Full name of cash collateral manager:	BlackRock Fund Advisors
ii. LEI, if any:	549300YOOGP0Y1M95C20
iii. Is the cash collateral manager an affiliated person, or an affiliated person of an affiliated person, of a securities lending agent retained by the Fund?	Yes No
iv. Is the cash collateral manager an affiliated person, or an affiliated person of an affiliated person, of the Fund?	Yes No

e. Types of payments made to one or more securities lending agents and cash collateral managers (check all that apply):	i. Revenue sharing split   ii. Non-revenue sharing split (other than administrative fee)    iii. Administrative fee   iv. Cash collateral reinvestment fee   v. Indemnification fee   vi. Other     N/A
If other, describe:	Rebates paid to borrowers
f. Provide the monthly average of the value of portfolio securities on loan during the reporting period	47,412,203.00000000
g. Provide the net income from securities lending activities	86,247.00000000

Item C.7. Reliance on certain rules.

Did the Fund rely on any of the following rules under the Act during the reporting period? (check all that apply)

a. Rule 10f-3 (17 CFR 270.10f-3)    b. Rule 12d1-1 (17 CFR 270.12d1-1)   c. Rule 15a-4 (17 CFR 270.15a-4)    d. Rule 17a-6 (17 CFR 270.17a-6)    e. Rule 17a-7 (17 CFR 270.17a-7)   f. Rule 17a-8 (17 CFR 270.17a-8)   g. Rule 17e-1 (17 CFR 270.17e-1)   h. Rule 22d-1 (17 CFR 270.22d-1)   i. Rule 23c-1 (17 CFR 270.23c-1)    j. Rule 32a-4 (17 CFR 270.32a-4)   k. Rule 6c-11 (17 CFR 270.6c-11)   N/A

Item C.8. Expense limitations.

a. Did the Fund have an expense limitation arrangement in place during the reporting period?	Yes No
b. Were any expenses of the Fund reduced or waived pursuant to an expense limitation arrangement during the reporting period?	Yes No
c. Are the fees waived subject to recoupment?	Yes No
d. Were any expenses previously waived recouped during the period?	Yes No

Item C.9. Investment advisers.

Investment Advisers Record: 1
i. Full name	BlackRock Fund Advisors
ii. SEC file number ( e.g., 801- )	801-22609
iii.CRD number	000105247
iv. LEI, if any	549300YOOGP0Y1M95C20
v. State, if applicable	CALIFORNIA
vi. Foreign country, if applicable	UNITED STATES OF AMERICA
vii. Was the investment adviser hired during the reporting period?	Yes No

i. Full name
ii. SEC file number ( e.g., 801- ), if applicable
iii. CRD number
iv. LEI, if any
v. State, if applicable
vi. Foreign country, if applicable
vii. Is the sub-adviser an affiliated person of the Fund's investment adviser(s)?	Yes No
viii. Was the sub-adviser hired during the reporting period?	Yes No

Item C.10. Transfer agents.

Transfer Agents Record: 1
i. Full name	State Street Bank and Trust Company
ii.SEC file number ( e.g., 84- or 85- )	85-05003
iii. LEI, if any	571474TGEMMWANRLN572
iv. State, if applicable	MASSACHUSETTS
v. Foreign country, if applicable	UNITED STATES OF AMERICA
vi. Is the transfer agent an affiliated person of the Fund or its investment adviser(s)?	Yes No
vii. Is the transfer agent a sub-transfer agent?	Yes No

b. Has a transfer agent been hired or terminated during the reporting period?

Yes No

Item C.11. Pricing services.

Pricing Services Record: 1
i. Full name	Bloomberg L.P.
ii. LEI, if any, or provide and describe other identifying number	549300B56MD0ZC402L06
Description of other identifying number
iii. State, if applicable	NEW YORK
iv. Foreign country, if applicable	UNITED STATES OF AMERICA
v. Is the pricing service an affiliated person of the Fund or its investment adviser(s)?	Yes No
Pricing Services Record: 2
i. Full name	Refinitiv US Holdings Inc.
ii. LEI, if any, or provide and describe other identifying number	549300NF240HXJO7N016
Description of other identifying number
iii. State, if applicable	NEW YORK
iv. Foreign country, if applicable	UNITED STATES OF AMERICA
v. Is the pricing service an affiliated person of the Fund or its investment adviser(s)?	Yes No
Pricing Services Record: 3
i. Full name	IHS Markit Ltd.
ii. LEI, if any, or provide and describe other identifying number	549300HLPTRASHS0E726
Description of other identifying number
iii. State, if applicable
iv. Foreign country, if applicable	UNITED KINGDOM OF GREAT BRITAIN AND NORTHERN IRELAND
v. Is the pricing service an affiliated person of the Fund or its investment adviser(s)?	Yes No
Pricing Services Record: 4
i. Full name	ICE Data Services, Inc.
ii. LEI, if any, or provide and describe other identifying number	13-3668779
Description of other identifying number	Tax ID
iii. State, if applicable	NEW YORK
iv. Foreign country, if applicable	UNITED STATES OF AMERICA
v. Is the pricing service an affiliated person of the Fund or its investment adviser(s)?	Yes No

b. Was a pricing service hired or terminated during the reporting period?

Yes No

Item C.12. Custodians.

Custodians Record: 1
i. Full name	State Street Bank and Trust Company
ii. LEI, if any	571474TGEMMWANRLN572
iii. State, if applicable	MASSACHUSETTS
iv. Foreign country, if applicable	UNITED STATES OF AMERICA
v. Is the custodian an affiliated person of the Fund or its investment adviser(s)?	Yes No
vi. Is the custodian a sub-custodian?	Yes No
vii. With respect to the custodian, check below to indicate the type of custody:	1.Bank - section 17(f)(1) (15 U.S.C. 80a-17(f)(1)) 2.Member national securities exchange - rule 17f-1 (17 CFR 270.17f-1) 3.Self - rule 17f-2 (17 CFR 270.17f-2) 4.Securities depository - rule 17f-4 (17 CFR 270.17f-4) 5.Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) 6.Futures commission merchants and commodity clearing organizations - rule 17f-6 (17 CFR 270.17f-6) 7.Foreign securities depository - rule 17f-7 (17 CFR 270.17f-7) 8.Insurance company sponsor - rule 26a-2 (17 CFR 270.26a-2) 9.Other
Custodians Record: 2
i. Full name	Wells Fargo Securities, LLC
ii. LEI, if any	VYVVCKR63DVZZN70PB21
iii. State, if applicable	NORTH CAROLINA
iv. Foreign country, if applicable	UNITED STATES OF AMERICA
v. Is the custodian an affiliated person of the Fund or its investment adviser(s)?	Yes No
vi. Is the custodian a sub-custodian?	Yes No
vii. With respect to the custodian, check below to indicate the type of custody:	1.Bank - section 17(f)(1) (15 U.S.C. 80a-17(f)(1)) 2.Member national securities exchange - rule 17f-1 (17 CFR 270.17f-1) 3.Self - rule 17f-2 (17 CFR 270.17f-2) 4.Securities depository - rule 17f-4 (17 CFR 270.17f-4) 5.Foreign custodian - rule 17f-5 (17 CFR 270.17f-5) 6.Futures commission merchants and commodity clearing organizations - rule 17f-6 (17 CFR 270.17f-6) 7.Foreign securities depository - rule 17f-7 (17 CFR 270.17f-7) 8.Insurance company sponsor - rule 26a-2 (17 CFR 270.26a-2) 9.Other

b. Has a custodian been hired or terminated during the reporting period?*

Yes No

Item C.13. Shareholder servicing agents.

i. Full name
ii. LEI, if any, or provide and describe other identifying number
Description of other identifying number
iii. State, if applicable
iv. Foreign country, if applicable
v. Is the shareholder servicing agent an affiliated person of the Fund or its investment adviser(s)?	Yes No
vi. Is the shareholder servicing agent a sub-shareholder servicing agent?	Yes No

b. Has a shareholder servicing agent been hired or terminated during the reporting period?

Yes No

Item C.14. Administrators.