| Interest Rate | Maturity Date | Principal Amount (000) | Value | |||
| Municipal Obligations–167.99%(a) | ||||||
| Alabama–1.98% | ||||||
| Alabama (State of) Special Care Facilities Financing Authority (Ascension Health Senior Credit Group); Series 2016 B, Ref. RB(b)(c) | 5.00% | 11/15/2046 | $ 3,630 | $ 3,811,422 | ||
| Birmingham (City of), AL Special Care Facilities Financing Authority (Methodist Home for the Aging); Series 2016, RB | 5.75% | 06/01/2045 | 185 | 182,447 | ||
| Birmingham (City of), AL Water Works Board; Series 2016 B, Ref. RB(b)(d) | 5.00% | 01/01/2027 | 940 | 1,058,663 | ||
| Huntsville (City of), AL Special Care Facilities Financing Authority (Redstone Village); Series 2007, RB (Acquired 12/17/2007-12/18/2007; Cost $1,655,986)(e)(f) | 5.50% | 01/01/2043 | 1,900 | 1,089,878 | ||
| Lower Alabama Gas District (The); Series 2016 A, RB | 5.00% | 09/01/2046 | 2,100 | 2,381,282 | ||
| Tuscaloosa (County of), AL Industrial Development Authority (Hunt Refining); Series 2019 A, Ref. IDR(g) | 5.25% | 05/01/2044 | 615 | 623,866 | ||
| 9,147,558 | ||||||
| Arizona–3.17% | ||||||
| Arizona (State of) Health Facilities Authority (Scottsdale Lincoln Hospital); Series 2014, Ref. RB | 5.00% | 12/01/2042 | 1,870 | 1,924,394 | ||
| Arizona (State of) Industrial Development Authority; | ||||||
| Series 2019-2, Class A, Ctfs. | 3.63% | 05/20/2033 | 796 | 802,082 | ||
| Series 2020 A, RB(g) | 5.00% | 12/15/2050 | 300 | 307,724 | ||
| Arizona (State of) Industrial Development Authority (Great Lakes Senior Living Community); Series 2019 B, RB | 5.13% | 01/01/2054 | 60 | 39,900 | ||
| Arizona (State of) Industrial Development Authority (Leman Academy of Excellence); Series 2017 A, Ref. RB(b)(d)(g) | 5.25% | 07/01/2022 | 870 | 881,578 | ||
| Glendale (City of), AZ Industrial Development Authority (The Beatitudes Campus); | ||||||
| Series 2017, Ref. RB | 5.00% | 11/15/2030 | 1,000 | 1,014,259 | ||
| Series 2017, Ref. RB | 5.00% | 11/15/2045 | 665 | 628,995 | ||
| Maricopa (County of), AZ Industrial Development Authority (Legacy Traditional Schools); Series 2019, Ref. RB(g) | 5.00% | 07/01/2054 | 165 | 167,267 | ||
| Phoenix (City of), AZ Industrial Development Authority (Legacy Traditional Schools); Series 2014 A, RB(g) | 6.50% | 07/01/2034 | 380 | 405,113 | ||
| Phoenix Civic Improvement Corp.; | ||||||
| Series 2017 A, RB(h) | 5.00% | 07/01/2042 | 1,160 | 1,237,056 | ||
| Series 2017 A, RB(h) | 5.00% | 07/01/2047 | 1,855 | 1,967,100 | ||
| Series 2020, RB(c) | 5.00% | 07/01/2049 | 2,250 | 2,475,048 | ||
| Pima (City of), AZ Industrial Development Authority (The) (Tucson Medical Center); Series 2021, Ref. RB | 3.00% | 04/01/2051 | 1,155 | 916,321 | ||
| Pima (County of), AZ Industrial Development Authority (American Leadership Academy); Series 2019, Ref. RB(g) | 5.00% | 06/15/2052 | 270 | 271,731 | ||
| Pima (County of), AZ Industrial Development Authority (Grande Innovations Academy); Series 2018, RB(g) | 5.38% | 07/01/2052 | 885 | 888,149 | ||
| Salt Verde Financial Corp.; Series 2007, RB | 5.00% | 12/01/2037 | 600 | 677,881 | ||
| 14,604,598 | ||||||
| Arkansas–0.12% | ||||||
| Arkansas (State of) Development Finance Authority (Baptist Memorial Health); Series 2020, Ref. RB | 5.00% | 09/01/2039 | 500 | 535,956 | ||
| California–14.75% | ||||||
| Bay Area Toll Authority (San Francisco Bay Area); Series 2017 F-1, RB(b)(c)(d)(i) | 5.00% | 04/01/2056 | 1,890 | 2,139,444 | ||
| Beverly Hills Unified School District (Election of 2008); Series 2009, GO Bonds(j) | 0.00% | 08/01/2028 | 900 | 760,706 | ||
| California (County of), CA Tobacco Securitization Agency; Series 2020 A, Ref. RB | 4.00% | 06/01/2037 | 275 | 279,590 | ||
| California (County of), CA Tobacco Securitization Agency (Alameda County Tobacco Asset Securitization Corp.); Series 2006 C, RB(j) | 0.00% | 06/01/2055 | 8,390 | 727,388 | ||
| California (County of), CA Tobacco Securitization Agency (Los Angeles County Securitization Corp.); | ||||||
| Series 2020 B-1, Ref. RB | 5.00% | 06/01/2049 | 80 | 84,588 | ||
| Series 2020 B-2, Ref. RB(j) | 0.00% | 06/01/2055 | 1,245 | 224,434 | ||
| Interest Rate | Maturity Date | Principal Amount (000) | Value | ||
| California–(continued) | |||||
| California (State of); | |||||
| Series 2013, GO Bonds | 5.00% | 04/01/2037 | $ 1,350 | $ 1,384,544 | |
| Series 2013, Ref. GO Bonds | 5.25% | 09/01/2030 | 2,000 | 2,085,919 | |
| Series 2020, GO Bonds (INS - BAM)(k) | 3.00% | 11/01/2050 | 1,750 | 1,572,581 | |
| Series 2022, Ref. GO Bonds | 4.00% | 04/01/2042 | 2,395 | 2,561,995 | |
| Series 2022, Ref. GO Bonds | 5.00% | 04/01/2042 | 750 | 826,130 | |
| California (State of) Community Housing Agency (Annadel Apartments); Series 2019 A, RB(g) | 5.00% | 04/01/2049 | 625 | 605,224 | |
| California (State of) Health Facilities Financing Authority (PIH Health); Series 2020 A, RB | 4.00% | 06/01/2050 | 3,125 | 3,119,079 | |
| California (State of) Housing Finance Agency; | |||||
| Series 2019 A-2, RB | 4.00% | 03/20/2033 | 361 | 361,118 | |
| Series 2021 A, RB | 3.25% | 08/20/2036 | 536 | 500,193 | |
| Series 2021-1, Class A, Ctfs. | 3.50% | 11/20/2035 | 614 | 589,365 | |
| California (State of) Municipal Finance Authority (Bella Mente Montessori Academy); Series 2018 A, RB(g) | 5.00% | 06/01/2048 | 145 | 145,745 | |
| California (State of) Municipal Finance Authority (CHF-Davis I, LLC - West Village Student Housing); Series 2018, RB | 5.00% | 05/15/2035 | 940 | 985,349 | |
| California (State of) Municipal Finance Authority (Green Bonds); Series 2021, RB (INS - BAM)(k) | 4.00% | 05/15/2041 | 500 | 500,694 | |
| California (State of) Municipal Finance Authority (Linxs APM); | |||||
| Series 2018 A, RB(h) | 5.00% | 12/31/2038 | 1,110 | 1,167,931 | |
| Series 2018 A, RB(h) | 5.00% | 12/31/2043 | 1,500 | 1,567,742 | |
| California (State of) Municipal Finance Authority (United Airlines, Inc.); Series 2019, RB(h) | 4.00% | 07/15/2029 | 1,240 | 1,215,005 | |
| California (State of) Municipal Finance Authority (William Jessup University); Series 2019, Ref. RB | 5.00% | 08/01/2039 | 185 | 186,428 | |
| California (State of) Pollution Control Finance Authority; | |||||
| Series 2012, RB(g)(h) | 5.00% | 07/01/2027 | 930 | 936,372 | |
| Series 2012, RB(g)(h) | 5.00% | 07/01/2030 | 1,215 | 1,221,447 | |
| Series 2012, RB(g)(h) | 5.00% | 07/01/2037 | 2,685 | 2,695,261 | |
| California (State of) Statewide Communities Development Authority (Loma Linda University Medical Center); | |||||
| Series 2014, RB | 5.25% | 12/01/2044 | 655 | 671,503 | |
| Series 2016 A, RB(g) | 5.00% | 12/01/2041 | 1,030 | 1,047,849 | |
| Series 2016 A, RB(g) | 5.25% | 12/01/2056 | 750 | 763,868 | |
| California State University; | |||||
| Series 2019 A, RB | 5.00% | 11/01/2044 | 1,495 | 1,684,248 | |
| Series 2019 A, RB(b)(c) | 5.00% | 11/01/2049 | 1,585 | 1,775,458 | |
| CSCDA Community Improvement Authority (Jefferson-Anaheim Social Bonds); Series 2021 A, RB(g) | 3.13% | 08/01/2056 | 625 | 474,065 | |
| CSCDA Community Improvement Authority (Social Bonds); | |||||
| Series 2021 A-2, RB(g) | 4.00% | 09/01/2056 | 625 | 561,607 | |
| Series 2021, RB(g) | 4.00% | 08/01/2056 | 375 | 334,049 | |
| Daly City (City of), CA Housing Development Finance Agency (Franciscan Mobile Home Park Acquisition); Series 2007 C, Ref. RB | 6.50% | 12/15/2047 | 380 | 380,162 | |
| Foothill-Eastern Transportation Corridor Agency; Series 2015, Ref. RB (INS - AGM)(j)(k) | 0.00% | 01/15/2034 | 3,145 | 2,077,664 | |
| Golden State Tobacco Securitization Corp.; | |||||
| Series 2013 A, RB(b)(d) | 5.00% | 06/01/2023 | 1,050 | 1,086,157 | |
| Series 2015, Ref. RB(b)(d) | 5.00% | 06/01/2025 | 1,350 | 1,468,873 | |
| Series 2015, Ref. RB(b)(d) | 5.00% | 06/01/2025 | 1,650 | 1,795,289 | |
| Series 2018 A-1, Ref. RB(b)(d) | 5.00% | 06/01/2022 | 425 | 425,000 | |
| Series 2018 A-1, Ref. RB(b)(d) | 5.00% | 06/01/2028 | 1,015 | 1,178,479 | |
| Series 2021 B-2, Ref. RB(j) | 0.00% | 06/01/2066 | 2,155 | 285,173 | |
| Los Angeles (City of), CA Department of Airports; Series 2018 C, RB(h) | 5.00% | 05/15/2035 | 725 | 782,252 | |
| Los Angeles (City of), CA Department of Airports (Los Angeles International Airport); Series 2019, RB(h) | 5.00% | 05/15/2037 | 2,315 | 2,535,426 | |
| Los Angeles (City of), CA Department of Water & Power; | |||||
| Series 2012 B, RB(b)(d) | 5.00% | 07/01/2022 | 600 | 601,885 | |
| Series 2012 B, RB | 5.00% | 07/01/2037 | 600 | 601,430 | |
| Series 2022 A, RB(c) | 5.00% | 07/01/2051 | 1,740 | 2,002,266 | |
| M-S-R Energy Authority; | |||||
| Series 2009 B, RB | 7.00% | 11/01/2034 | 435 | 555,294 | |
| Series 2009 B, RB | 6.50% | 11/01/2039 | 1,660 | 2,126,210 | |
| Mt. San Antonio Community College District (Election of 2008); Series 2013 A, GO Bonds(l) | 6.25% | 08/01/2043 | 1,500 | 1,517,136 | |
| Regents of the University of California Medical Center Pooled Revenue; Series 2022 P, RB(c)(i) | 4.00% | 05/15/2053 | 4,065 | 4,159,993 | |
| Interest Rate | Maturity Date | Principal Amount (000) | Value | |||
| California–(continued) | ||||||
| San Francisco (City & County of), CA Airport Commission (San Francisco International Airport); | ||||||
| Series 2019 A, RB(h) | 5.00% | 05/01/2036 | $ 875 | $ 959,066 | ||
| Series 2019 A, RB(h) | 5.00% | 05/01/2049 | 1,760 | 1,896,367 | ||
| Santa Cruz (County of), CA Capital Financing Authority; Series 2021 A, RB | 4.00% | 06/01/2046 | 600 | 614,557 | ||
| Santa Margarita Water District (Community Facilities District No. 2013-1); Series 2013, RB | 5.50% | 09/01/2032 | 505 | 517,710 | ||
| Silicon Valley Tobacco Securitization Authority (Santa Clara); Series 2007 A, RB(j) | 0.00% | 06/01/2041 | 2,605 | 899,196 | ||
| University of California; | ||||||
| Series 2018 AZ, Ref. RB(c) | 4.00% | 05/15/2048 | 1,780 | 1,824,945 | ||
| Series 2021 Q, Ref. RB (INS - BAM)(k) | 4.00% | 05/15/2051 | 1,905 | 1,966,704 | ||
| 68,014,153 | ||||||
| Colorado–4.65% | ||||||
| Arkansas River Power Authority; Series 2006, RB(d) | 5.88% | 10/01/2026 | 925 | 999,131 | ||
| Aurora Highlands Community Authority Board; Series 2021 A, Ref. RB | 5.75% | 12/01/2051 | 620 | 580,783 | ||
| Belford North Metropolitan District; Series 2020 A, GO Bonds | 5.50% | 12/01/2050 | 780 | 717,121 | ||
| Colorado (State of) Health Facilities Authority (Adventhealth Obligated Group); Series 2021 A, Ref. RB | 4.00% | 11/15/2050 | 555 | 559,723 | ||
| Colorado (State of) Health Facilities Authority (CommonSpirit Health); | ||||||
| Series 2019 A-2, Ref. RB | 5.00% | 08/01/2044 | 2,745 | 2,866,202 | ||
| Series 2019 A-2, Ref. RB(c)(i) | 5.00% | 08/01/2044 | 935 | 976,284 | ||
| Series 2019 A-2, Ref. RB | 4.00% | 08/01/2049 | 1,245 | 1,217,021 | ||
| Colorado (State of) Health Facilities Authority (Evangelical Lutheran Good Samaritan Society (The)); Series 2017, Ref. RB(b)(d) | 5.00% | 06/01/2027 | 435 | 491,858 | ||
| Colorado (State of) Health Facilities Authority (Volunteers of America Care); Series 2007 A, RB | 5.30% | 07/01/2037 | 690 | 579,490 | ||
| Colorado (State of) Science and Technology Park Metropolitan District No. 1; Series 2018, RB | 5.00% | 12/01/2033 | 500 | 509,913 | ||
| Colorado Crossing Metropolitan District No. 2; Series 2020 A-1, Ref. GO Bonds | 5.00% | 12/01/2047 | 500 | 470,915 | ||
| Denver (City & County of), CO; | ||||||
| Series 2012 B, RB(b)(d) | 5.00% | 11/15/2022 | 1,400 | 1,423,206 | ||
| Series 2018 A, RB(c)(h) | 5.25% | 12/01/2048 | 1,315 | 1,419,487 | ||
| Series 2018 A-2, RB(j) | 0.00% | 08/01/2034 | 1,270 | 820,949 | ||