| Corporate Bonds — 0.2% |
| Security | Principal Amount (000's omitted) | Value | |
| Hospital — 0.2% | |||
| Boston Medical Center Corp., 4.581%, 7/1/47 | $ | 835 | $ 663,046 |
| Total Corporate Bonds (identified cost $835,000) | $ 663,046 | ||
| Tax-Exempt Municipal Obligations — 138.2% |
| Security | Principal Amount (000's omitted) | Value | |
| Bond Bank — 0.3% | |||
| Delaware Valley Regional Finance Authority, PA, 5.75%, 7/1/32 | $ | 1,000 | $ 1,187,263 |
| Rickenbacker Port Authority, OH, (OASBO Expanded Asset Pooled Financing Program), 5.375%, 1/1/32 | 265 | 297,915 | |
| $ 1,485,178 | |||
| Cogeneration — 0.1% | |||
| Northampton County Industrial Development Authority, PA, (Northampton Generating), (AMT), 5.00%, 6/30/27(1) | $ | 630 | $ 277,291 |
| $ 277,291 | |||
| Education — 5.8% | |||
| Arizona Industrial Development Authority, (Pinecrest Academy of Nevada), 4.00%, 7/15/50(2) | $ | 430 | $ 357,126 |
| Boyle County, KY, (Centre College), 4.50%, 6/1/53 | 605 | 563,405 | |
| California Municipal Finance Authority, (Westside Neighborhood School), 6.20%, 6/15/54(2) | 1,060 | 1,116,375 | |
| California State University, 5.25%, 11/1/56(3) | 4,000 | 4,363,600 | |
| Capital Trust Agency, FL, (Florida Charter Educational Foundation, Inc.): | |||
| 5.375%, 6/15/38(2) | 350 | 352,345 | |
| 5.375%, 6/15/48(2) | 655 | 619,650 | |
| District of Columbia, (KIPP DC), 4.00%, 7/1/44 | 485 | 455,533 | |
| Florida Higher Educational Facilities Financing Authority, (Jacksonville University), 5.00%, 6/1/48(2) | 250 | 226,104 | |
| Illinois Finance Authority, (DePaul College Prep Foundation), 5.625%, 8/1/53(2) | 1,000 | 1,030,950 | |
| Massachusetts Development Finance Agency, (Boston University), 6.00%, 5/15/59 | 5,580 | 6,095,063 | |
| Pennsylvania University, 5.50%, 9/1/55(3) | 6,000 | 6,577,020 | |
| Security | Principal Amount (000's omitted) | Value | |
| Education (continued) | |||
| Public Finance Authority, WI, (Roseman University of Health Sciences): | |||
| 4.00%, 4/1/52(2) | $ | 245 | $ 198,163 |
| 5.00%, 4/1/40(2) | 710 | 722,500 | |
| 5.00%, 4/1/50(2) | 1,030 | 976,277 | |
| South Carolina Jobs-Economic Development Authority, (Carolina Voyager), 5.00%, 6/15/44(2) | 1,745 | 1,769,345 | |
| $ 25,423,456 | |||
| Electric Utilities — 2.5% | |||
| Omaha Public Power District, NE, 5.25%, 2/1/55(3) | $ | 10,000 | $ 10,705,900 |
| Seattle, WA, Municipal Light and Power Revenue, 5.00%, 3/1/53 | 30 | 31,163 | |
| $ 10,737,063 | |||
| Escrowed/Prerefunded — 0.0%† | |||
| Public Finance Authority, WI, (Roseman University of Health Sciences): | |||
| Prerefunded to 4/1/30, 5.00%, 4/1/50(2) | $ | 20 | $ 22,009 |
| Prerefunded to 4/1/32, 4.00%, 4/1/52(2) | 5 | 5,421 | |
| $ 27,430 | |||
| General Obligations — 20.4% | |||
| Aledo Independent School District, TX, (PSF Guaranteed), 5.00%, 2/15/53(3) | $ | 4,000 | $ 4,126,240 |
| Bend, OR, 5.00%, 6/1/50(3) | 10,000 | 10,665,900 | |
| California, 5.00%, 3/1/49(3) | 10,000 | 10,844,600 | |
| Canton Independent School District, TX, (PSF Guaranteed): | |||
| 5.25%, 2/15/50(3) | 2,350 | 2,529,634 | |
| 5.25%, 2/15/55(3) | 2,350 | 2,511,092 | |
| Chicago Board of Education, IL: | |||
| 5.00%, 12/1/42 | 8,160 | 8,139,573 | |
| 6.00%, 12/1/49 | 2,625 | 2,720,950 | |
| Chicago, IL, 5.75%, 1/1/33 | 1,500 | 1,523,000 | |
| Hays Consolidated Independent School District, TX, (PSF Guaranteed), 5.25%, 2/15/55(3) | 10,000 | 10,685,500 | |
| Illinois: | |||
| 5.00%, 12/1/42 | 3,020 | 3,066,958 | |
| 5.50%, 5/1/39 | 290 | 313,807 | |
| 5.75%, 5/1/45 | 290 | 308,063 | |
| Massachusetts, 5.00%, 4/1/55(3) | 4,000 | 4,199,840 | |
| Mesquite Independent School District, TX, (PSF Guaranteed): | |||
| 5.00%, 8/15/49 | 260 | 276,526 | |
| 5.00%, 8/15/49(3) | 6,000 | 6,381,360 | |
| Security | Principal Amount (000's omitted) | Value | |
| General Obligations (continued) | |||
| Northside Independent School District, TX, (PSF Guaranteed), 5.25%, 2/15/55(3) | $ | 6,750 | $ 7,223,107 |
| Puerto Rico, 0.00%, 7/1/33 | 3,000 | 2,221,327 | |
| Royse City Independent School District, TX, (PSF Guaranteed): | |||
| 5.00%, 2/15/53 | 5 | 5,181 | |
| 5.25%, 2/15/55(3) | 1,325 | 1,415,829 | |
| 5.25%, 2/15/58(3) | 2,275 | 2,423,603 | |
| San Angelo Independent School District, TX, (PSF Guaranteed), 5.25%, 2/15/55(3) | 4,000 | 4,274,200 | |
| Van Alstyne Independent School District, TX, (PSF Guaranteed), 5.25%, 2/15/55(3) | 3,300 | 3,526,215 | |
| $ 89,382,505 | |||
| Hospital — 5.5% | |||
| Allen County, OH, (Mercy Health), 4.00%, 8/1/47(3) | $ | 1,000 | $ 905,170 |
| Colorado Health Facilities Authority, (CommonSpirit Health Obligations), 5.50%, 11/1/47 | 1,485 | 1,578,937 | |
| Idaho Health Facilities Authority, ID, (St. Luke’s Health System), 4.375%, 3/1/53 | 1,815 | 1,751,778 | |
| Michigan Finance Authority, (McLaren Health Care), 4.00%, 2/15/47 | 2,985 | 2,721,871 | |
| Montgomery County Higher Education and Health Authority, PA, (Thomas Jefferson University Obligated Group), 5.00%, 5/1/57 | 1,365 | 1,374,947 | |
| Muskingum County, OH, (Genesis HealthCare System Obligated Group), 5.00%, 2/15/44 | 1,835 | 1,835,243 | |
| New Jersey Health Care Facilities Financing Authority, (AHS Hospital Corp.), 5.00%, 7/1/27 | 35 | 35,072 | |
| Pennsylvania Economic Development Financing Authority, (UPMC), 4.00%, 5/15/48 | 750 | 678,715 | |
| South Carolina Jobs-Economic Development Authority, (McLeod Health), 5.25%, 11/1/54(3) | 6,500 | 6,925,880 | |
| South Carolina Jobs-Economic Development Authority, (Novant Health Obligated Group), 4.25%, 11/1/47 | 2,000 | 1,947,367 | |
| Southeastern Ohio Port Authority, OH, (Memorial Health System Obligated Group): | |||
| 5.00%, 12/1/43 | 875 | 824,830 | |
| 5.50%, 12/1/43 | 500 | 499,979 | |
| West Virginia Hospital Finance Authority, (West Virginia University Health System Obligated Group), 4.375%, 6/1/53 | 2,850 | 2,703,096 | |
| Westchester County Local Development Corp., NY, (Westchester Medical Center Obligated Group), 6.25%, 11/1/52 | 340 | 350,398 | |
| $ 24,133,283 | |||
| Security | Principal Amount (000's omitted) | Value | |
| Housing — 2.5% | |||
| Indiana Housing and Community Development Authority, SFMR, Social Bonds, (FHLMC), (FNMA), (GNMA), 4.70%, 7/1/53 | $ | 1,415 | $ 1,417,777 |
| Massachusetts Housing Finance Agency, Sustainability Bonds, 4.90%, 12/1/59 | 975 | 979,623 | |
| Michigan Housing Development Authority, Social Bonds, 5.00%, 12/1/55 | 1,385 | 1,405,547 | |
| Texas Student Housing Corp., (University of North Texas), 6.85%, 7/1/31(4) | 180 | 180,000 | |
| Washington Housing Finance Commission, Social Certificates, 3.375%, 4/20/37 | 4,990 | 4,828,766 | |
| Waterbury Housing Authority, CT, (Laurel Estates Preservation LLC), (FHLMC), 4.50%, 2/1/42 | 1,990 | 2,078,555 | |
| $ 10,890,268 | |||
| Industrial Development Revenue — 10.0% | |||
| Arkansas Development Finance Authority, (United States Steel Corp.): | |||
| Green Bonds, (AMT), 5.45%, 9/1/52 | $ | 3,000 | $ 3,025,468 |
| Green Bonds, (AMT), 5.70%, 5/1/53 | 3,385 | 3,461,447 | |
| Cleveland, OH, (Continental Airlines), 5.375%, 9/15/27 | 555 | 556,135 | |
| Hawaii Department of Budget and Finance, (Hawaiian Electric Co.), 3.20%, 7/1/39 | 1,000 | 923,387 | |
| Henderson, KY, (Pratt Paper, LLC), (AMT), 4.70%, 1/1/52(2) | 2,500 | 2,390,031 | |
| Hoover Industrial Development Board, AL, (United States Steel Corp.), (AMT), 5.75%, 10/1/49 | 1,250 | 1,268,199 | |
| Jefferson County Port Authority, OH, (JSW Steel USA Ohio, Inc.): | |||
| 5.00% to 12/1/28 (Put Date), 12/1/53(2) | 3,500 | 3,590,725 | |
| (AMT), 3.50%, 12/1/51(2) | 2,000 | 1,704,287 | |
| National Finance Authority, NH, (Covanta): | |||
| 4.625%, 11/1/42(2) | 3,075 | 2,809,298 | |
| (AMT), 4.875%, 11/1/42(2) | 245 | 230,496 | |
| New Jersey Economic Development Authority, (Continental Airlines): | |||
| 5.25%, 9/15/29 | 3,400 | 3,406,672 | |
| 5.50%, 6/1/33 | 750 | 752,234 | |
| (AMT), 5.625%, 11/15/30 | 4,510 | 4,527,518 | |
| New York State Environmental Facilities Corp., (Casella Waste Systems, Inc.), (AMT), 5.125% to 9/3/30 (Put Date), 9/1/50(2) | 700 | 739,069 | |
| New York Transportation Development Corp., (Delta Air Lines, Inc. - LaGuardia Airport Terminals C&D Redevelopment): | |||
| (AMT), 5.00%, 10/1/40 | 6,830 | 7,071,857 | |
| (AMT), 5.625%, 4/1/40 | 5,605 | 6,001,698 | |
| Security | Principal Amount (000's omitted) | Value | |
| Industrial Development Revenue (continued) | |||
| Pennsylvania Economic Development Financing Authority, (Procter & Gamble Paper Products Co.), 5.375%, 3/1/31 | $ | 1,000 | $ 1,134,572 |
| Vermont Economic Development Authority, (Casella Waste Systems, Inc.), (AMT), 4.625% to 4/3/28 (Put Date), 4/1/36(2) | 300 | 305,433 | |
| $ 43,898,526 | |||
| Insured - Education — 0.6% | |||
| Massachusetts College Building Authority, (AG), 5.50%, 5/1/39 | $ | 1,000 | $ 1,251,297 |
| Massachusetts Development Finance Agency, (Holy Cross College), (AMBAC), 5.25%, 9/1/32(3) | 1,365 | 1,592,109 | |
| $ 2,843,406 | |||
| Insured - Electric Utilities — 2.9% | |||
| Cleveland, OH, Public Power System Revenue: | |||
| (NPFG), 0.00%, 11/15/27 | $ | 710 | $ 676,162 |
| (NPFG), 0.00%, 11/15/38 | 2,000 | 1,178,095 | |
| Georgia Municipal Electric Authority, (Plant Vogtle Units 3 & 4 Project J), (AG), 5.00%, 7/1/64 | 3,125 | 3,171,644 | |
| Puerto Rico Electric Power Authority: | |||
| (NPFG), 5.25%, 7/1/29 | 1,515 | 1,543,199 | |
| (NPFG), 5.25%, 7/1/32 | 250 | 256,571 | |
| (NPFG), 5.25%, 7/1/34 | 1,445 | 1,480,332 | |
| South Carolina Public Service Authority, (AG), 5.75%, 12/1/52 | 4,000 | 4,351,064 | |
| $ 12,657,067 | |||
| Insured - General Obligations — 1.0% | |||
| Canal Winchester Local School District, OH, (NPFG), 0.00%, 12/1/30 | $ | 2,455 | $ 2,154,241 |
| Massachusetts, (AMBAC), 5.50%, 8/1/30 | 1,000 | 1,131,009 | |
| Whatcom County Public Utility District No. 1, WA, (BAM), (AMT), 5.50%, 12/1/42 | 1,000 | 1,104,944 | |
| $ 4,390,194 | |||
| Insured - Hospital — 1.0% | |||
| West Virginia Hospital Finance Authority, (Vandalia Health), (AG), 5.50%, 9/1/48 | $ | 3,000 | $ 3,213,504 |
| Westchester County Local Development Corp., NY, (Westchester Medical Center Obligated Group), (AG), 5.00%, 11/1/51 | 1,140 | 1,166,129 | |
| $ 4,379,633 | |||
| Security | Principal Amount (000's omitted) | Value | |
| Insured - Housing — 0.3% | |||
| Knox County Health, Educational and Housing Facility Board, TN, (University of Tennessee), (BAM), 5.25%, 7/1/64 | $ | 1,300 | $ 1,352,771 |
| $ 1,352,771 | |||
| Insured - Lease Revenue/Certificates of Participation — 1.2% | |||
| Hinds County, MS, (Mississippi Lease Purchase), (BAM), 4.625%, 9/1/54(2) | $ | 2,160 | $ 2,080,571 |
| New Jersey Economic Development Authority, (School Facilities Construction), (NPFG), 5.50%, 9/1/28 | 1,000 | 1,081,809 | |
| New Jersey Transportation Trust Fund Authority, (Transportation System), (AMBAC), 0.00%, 12/15/28 | 2,400 | 2,241,696 | |
| $ 5,404,076 | |||
| Insured - Other Revenue — 0.2% | |||
| Massachusetts Development Finance Agency, (WGBH Educational Foundation), (AMBAC), 5.75%, 1/1/42 | $ | 590 | $ 711,638 |
| $ 711,638 | |||
| Insured - Special Tax Revenue — 4.4% | |||
| Harris County-Houston Sports Authority, TX, (AG), (NPFG), 0.00%, 11/15/34 | $ | 4,210 | $ 2,829,166 |
| Massachusetts, Dedicated Tax Revenue, (NPFG), 5.50%, 1/1/29 | 1,000 | 1,090,506 | |
| Miami-Dade County, FL, Professional Sports Franchise Facilities, (AG), 0.00%, 10/1/37 | 20,700 | 12,669,901 | |
| New Jersey Economic Development Authority, (Motor Vehicle Surcharges): | |||
| (AG), 0.00%, 7/1/26 | 760 | 752,850 | |
| (AG), 0.00%, 7/1/27 | 2,020 | 1,944,330 | |
| $ 19,286,753 | |||
| Insured - Transportation — 7.4% | |||
| Alameda Corridor Transportation Authority, CA, (NPFG), 0.00%, 10/1/33 | $ | 12,425 | $ 10,064,430 |
| Allegheny County Airport Authority, PA, (Pittsburgh International Airport), (AG), (AMT), 5.50%, 1/1/53 | 2,375 | 2,495,845 | |
| Chicago, IL, (Midway International Airport), (BAM), (AMT), 5.50%, 1/1/53 | 6,000 | 6,298,125 | |
| Houston, TX, Airport System Revenue, (AG), (AMT), 4.50%, 7/1/53 | 5,710 | 5,491,079 | |
| New York Transportation Development Corp., (John F. Kennedy Airport Terminal 6 Redevelopment), Green Bonds, (AG), (AMT), 5.25%, 12/31/54 | 3,935 | 4,042,444 | |
| Pennsylvania Economic Development Financing Authority, (PennDOT Major Bridges Package One), (AG), (AMT), 5.00%, 12/31/57 | 585 | 593,388 | |
| Security | Principal Amount (000's omitted) | Value | |
| Insured - Transportation (continued) | |||
| Pennsylvania Turnpike Commission, (AG), 6.375%, 12/1/38 | $ | 2,500 | $ 2,643,879 |
| Philadelphia Parking Authority, PA, (AMBAC), 5.25%, 2/15/29 | 625 | 631,754 | |
| $ 32,260,944 | |||
| Insured - Water and Sewer — 4.2% | |||
| DeKalb County, GA, Water and Sewerage Revenue, (AG), 5.00%, 10/1/35(3) | $ | 17,985 | $ 18,241,826 |
| $ 18,241,826 | |||
| Lease Revenue/Certificates of Participation — 3.8% | |||
| Baltimore, MD, (Harbor Point), 4.875%, 6/1/42 | $ | 555 | $ 572,396 |
| New Hampshire Business Finance Authority, (Centurion BioSquare, Inc.), 5.88%, 12/15/38 | 4,115 | 4,351,162 | |
| New Hampshire Business Finance Authority, (Centurion Foundation Broward Health Medical Center, LLC), 5.625%, 9/15/57 | 2,100 | 2,201,923 | |
| New Jersey Economic Development Authority, (Portal North Bridge Project), 5.00%, 11/1/52 | 3,500 | 3,629,256 | |
| New Jersey Economic Development Authority, (School Facilities Construction), 5.00%, 6/15/48 | 3,000 | 3,082,223 | |
| New Jersey Transportation Trust Fund Authority, (Transportation Program), 5.25%, 6/15/43 | 2,730 | 2,846,565 | |
| $ 16,683,525 | |||
| Other Revenue — 2.2% | |||
| Buckeye Tobacco Settlement Financing Authority, OH, 5.00%, 6/1/55 | $ | 5,045 | $ 4,172,331 |
| Central Falls Detention Facility Corp., RI, 7.25%, 7/15/35(4) | 1,925 | 750,750 | |
| Kalispel Tribe of Indians, WA, Series A, 5.25%, 1/1/38(2) | 485 | 496,286 | |
| Military Installation Development Authority, UT, 4.00%, 6/1/41 | 500 | 483,623 | |
| Morongo Band of Mission Indians, CA, 5.00%, 10/1/42(2) | 890 | 908,412 | |
| Patriots Energy Group Financing Agency, SC, Gas Supply Revenue, 5.25% to 8/1/31 (Put Date), 10/1/54 | 2,000 | 2,199,290 | |
| Riversouth Authority, OH, (Lazarus Building Redevelopment), 5.75%, 12/1/27 | 310 | 310,209 | |
| Southeast Energy Authority, AL, 5.00% to 6/1/35 (Put Date), 1/1/56 | 225 | 236,986 | |
| $ 9,557,887 | |||
| Security | Principal Amount (000's omitted) | Value | |
| Senior Living/Life Care — 11.9% | |||
| Build NYC Resource Corp., NY, (Riverspring Health Senior Living, Inc.), 5.50%, 12/15/32(2) | $ | 3,000 | $ 2,997,219 |
| California Health Facilities Financing Authority, (Episcopal Communities and Services), 5.25%, 11/15/58 | 1,530 | 1,567,795 | |
| Clackamas County Hospital Facility Authority, OR, (Rose Villa), 5.25%, 11/15/50 | 215 | 215,188 | |
| Colorado Health Facilities Authority, (Aberdeen Ridge), 5.00%, 5/15/58 | 1,510 | 1,105,929 | |
| Colorado Health Facilities Authority, (Frasier), 5.25%, 5/15/48 | 435 | 447,256 | |
| District of Columbia, (Ingleside at Rock Creek), 5.00%, 7/1/52 | 1,000 | 934,275 | |
| Fayetteville Public Facilities Board, AR, (Butterfield Trail Village), 5.50%, 12/1/54(5) | 600 | 616,814 | |
| Franklin County, OH, (Friendship Village of Dublin), 5.00%, 11/15/44 | 520 | 520,002 | |
| Lancaster County Hospital Authority, PA, (Brethren Village), 5.00%, 7/1/32 | 725 | 732,267 | |
| Massachusetts Development Finance Agency, (Linden Ponds, Inc.): | |||
| 5.00%, 11/15/33(2) | 775 | 799,269 | |
| 5.00%, 11/15/38(2) | 545 | 561,885 | |
| Massachusetts Development Finance Agency, (NewBridge on the Charles, Inc.), 5.00%, 10/1/57(2) | 310 | 303,694 | |
| Montgomery County Industrial Development Authority, PA, (Whitemarsh Continuing Care Retirement Community), 5.00%, 1/1/38 | 3,715 | 3,746,455 | |
| Multnomah County Hospital Facilities Authority, OR, (Terwilliger Plaza), 4.00%, 12/1/51 | 2,700 | 2,126,091 | |
| National Finance Authority, NH, (The Vista): | |||
| 5.625%, 7/1/46(2) | 465 | 468,395 | |
| 5.75%, 7/1/54(2) | 1,270 | 1,274,011 | |
| New Mexico Hospital Equipment Loan Council, (Haverland Carter Lifestyle Group): | |||
| 5.00%, 7/1/33 | 120 | 121,622 | |
| 5.00%, 7/1/34 | 130 | 131,420 | |
| 5.00%, 7/1/49 | 2,775 | 2,547,607 | |
| New York Dormitory Authority, (Orchard Park CCRC, Inc.), 5.125%, 11/15/55 | 960 | 975,186 | |
| Norfolk Redevelopment and Housing Authority, VA, (Fort Norfolk Retirement Community, Inc. - Harbor's Edge), 5.00%, 1/1/49 | 4,765 | 4,538,938 | |
| North Carolina Medical Care Commission, (Twin Lakes Community), 5.25%, 1/1/55 | 1,955 | 1,981,585 | |
| Palm Beach County Health Facilities Authority, FL, (Green Cay Life Plan Village): | |||
| 11.50%, 7/1/27(2) | 1,215 | 1,808,551 | |
| Security | Principal Amount (000's omitted) | Value | |
| Senior Living/Life Care (continued) | |||
| Palm Beach County Health Facilities Authority, FL, (Green Cay Life Plan Village): (continued) | |||
| 11.50%, 7/1/27(2) | $ | 130 | $ 130,910 |
| Public Finance Authority, WI, (Penick Village), 5.00%, 9/1/39(2) | 775 | 793,176 | |
| South Carolina Jobs-Economic Development Authority, (Rolling Green Village), 5.75%, 12/1/60 | 750 | 754,506 | |
| South Carolina Jobs-Economic Development Authority, (Seafields Kiawah Island Project), 7.75%, 11/15/58 | 3,000 | 3,224,862 | |
| Stamford Housing Authority, CT, (Mozaic Concierge Living), 6.00%, 10/1/40 | 750 | 807,970 | |
| Tarrant County Cultural Education Facilities Finance Corp., TX, (MRC Stevenson Oaks), 6.625%, 11/15/41 | 2,640 | 2,671,329 | |
| Tempe Industrial Development Authority, AZ, (Friendship Village of Tempe), 5.625%, 12/1/60 | 1,065 | 1,090,946 | |
| Tempe Industrial Development Authority, AZ, (Mirabella at ASU), 6.00%, 10/1/37(2) | 1,200 | 1,057,985 | |
| Virginia Beach Development Authority, VA, (Westminster-Canterbury on Chesapeake Bay): | |||
| 7.00%, 9/1/53 | 3,000 | 3,308,706 | |
| 7.00%, 9/1/59 | 1,000 | 1,097,698 | |
| Washington State Housing Finance Commission, (Horizon House), 6.25%, 1/1/61 | 5,790 | 5,801,800 | |
| Wisconsin Health and Educational Facilities Authority, (Three Pillars Senior Living Communities), 5.75%, 8/15/54 | 1,000 | 1,040,595 | |
| $ 52,301,937 | |||
| Special Tax Revenue — 17.2% | |||
| Aerotropolis Regional Transportation Authority, CO, 5.75%, 12/1/54(2) | $ | 3,440 | $ 3,459,688 |
| Atlanta Development Authority, GA, (Westside Gulch Area), 5.50%, 4/1/39(2) | 1,640 | 1,719,339 | |
| District of Columbia Income Tax Revenue, 5.25%, 6/1/50(3) | 6,000 | 6,509,040 | |
| Lakewood Ranch Stewardship District, FL, (Villages of Lakewood Ranch South): | |||
| 5.125%, 5/1/46 | 1,500 | 1,500,545 | |
| 6.00%, 5/1/56 | 1,000 | 1,039,137 | |
| Maryland Economic Development Corp., (Port Covington), 4.00%, 9/1/50 | 275 | 233,187 | |
| Massachusetts Bay Transportation Authority, Sales Tax Revenue, 5.25%, 7/1/55(3) | 6,000 | 6,449,100 | |
| Michigan, (Rebuilding Michigan Program), 5.50%, 11/15/49(3) | 4,000 | 4,351,920 | |
| Mida Mountain Village Public Infrastructure District, UT, 5.125%, 6/15/54(2) | 2,185 | 2,188,046 | |
| Security | Principal Amount (000's omitted) | Value | |
| Special Tax Revenue (continued) | |||
| New River Community Development District, FL, (Capital Improvements): | |||
| 5.00%, 5/1/13(6) | $ | 90 | $ 0 |
| 5.35%, 5/1/38(6) | 35 | 0 | |
| 5.75%, 5/1/38 | 110 | 110,962 | |
| New York City Transitional Finance Authority, NY, 5.50%, 5/1/52(3) | 10,000 | 10,820,900 | |
| New York City Transitional Finance Authority, NY, Future Tax Revenue, 3.00%, 11/1/47 | 2,195 | 1,702,173 | |
| New York Dormitory Authority, Personal Income Tax Revenue, 5.50%, 3/15/53(3) | 9,000 | 9,806,760 | |
| Puerto Rico Sales Tax Financing Corp.: | |||
| 0.00%, 7/1/27 | 179 | 171,895 | |
| 0.00%, 7/1/29 | 261 | 235,366 | |
| 0.00%, 7/1/31 | 316 | 266,010 | |
| 0.00%, 7/1/33 | 357 | 277,607 | |
| 0.00%, 7/1/46 | 3,403 | 1,224,095 | |
| 0.00%, 7/1/51 | 4,523 | 1,190,035 | |
| 4.50%, 7/1/34 | 286 | 286,065 | |
| 4.536%, 7/1/53 | 36 | 33,778 | |
| 5.00%, 7/1/58 | 4,752 | 4,664,224 | |
| Southern Hills Plantation I Community Development District, FL: | |||
| Series A1, 5.80%, 5/1/35 | 168 | 159,230 | |
| Series A2, 5.80%, 5/1/35(4) | 155 | 93,000 | |
| Sterling Hill Community Development District, FL, 6.20%, 5/1/35(4) | 552 | 226,227 | |
| Washington Metropolitan Area Transit Authority, D.C., Green Bonds, 5.25%, 7/15/59(3) | 16,000 | 16,816,320 | |
| $ 75,534,649 | |||
| Transportation — 30.4% | |||
| Atlanta, GA, Department of Aviation, Green Bonds, (AMT), 5.50%, 7/1/55(3) | $ | 10,000 | $ 10,617,500 |
| Charlotte, NC: | |||
| 5.00%, 7/1/50(3) | 5,400 | 5,710,824 | |
| 5.25%, 7/1/55 | 30 | 32,222 | |
| 5.25%, 7/1/55(3) | 9,450 | 10,149,772 | |
| Chicago, IL, (O'Hare International Airport), (AMT), 5.50%, 1/1/55(3) | 4,500 | 4,674,825 | |
| Denver City and County, CO, Airport System Revenue, (AMT), 5.75%, 11/15/45 | 2,500 | 2,735,304 | |
| Gerald R. Ford International Airport Authority, MI, (AMT), 5.00%, 1/1/54(3) | 11,000 | 11,238,810 | |
| Los Angeles Department of Airports, CA, (Los Angeles International Airport), Green Bonds, (AMT), 5.25%, 5/15/50(3) | 11,000 | 11,670,010 | |
| Security | Principal Amount (000's omitted) | Value | |
| Transportation (continued) | |||
| Louisiana Public Facilities Authority, (I-10 Calcasieu River Bridge Public-Private Partnership), (AMT), 5.75%, 9/1/64 | $ | 3,500 | $ 3,645,372 |
| Massachusetts, (Rail Enhancement Program), Sustainability Bonds, 5.00%, 6/1/53(3) | 6,000 | 6,265,740 | |
| Metropolitan Transportation Authority, NY, Green Bonds, 5.25%, 11/15/55 | 3,000 | 3,080,663 | |
| New York Transportation Development Corp., (John F. Kennedy Airport Terminals 6 Redevelopment), Green Bonds, (AMT), 5.50%, 12/31/60 | 2,830 | 2,903,270 | |
| New York Transportation Development Corp., (John F. Kennedy International Airport): | |||
| Green Bonds, (AMT), 5.375%, 6/30/60 | 2,025 | 2,033,626 | |
| Green Bonds, (AMT), 6.00%, 6/30/54 | 1,155 | 1,212,480 | |
| New York Transportation Development Corp., (LaGuardia Airport Terminal B Redevelopment): | |||
| (AMT), 5.00%, 7/1/41 | 1,150 | 1,151,090 | |
| (AMT), 5.25%, 1/1/50 | 1,050 | 1,050,377 | |
| New York Transportation Development Corp., (Terminal 4 John F. Kennedy International Airport), (AMT), 5.00%, 12/1/38 | 4,550 | 4,912,156 | |
| Oklahoma Turnpike Authority, 5.50%, 1/1/54(3) | 5,000 | 5,434,800 | |
| Philadelphia, PA, Airport Revenue, (AMT), 5.00%, 7/1/47 | 4,745 | 4,774,661 | |
| Public Finance Authority, WI, (Georgia SR 400 Express Lanes), (AMT), 5.75%, 6/30/60 | 7,000 | 7,338,876 | |
| San Diego County Regional Airport Authority, CA, (San Diego International Airport), (AMT), 5.00%, 7/1/53 | 2,530 | 2,591,955 | |
| San Francisco City and County Airport Commission, CA, (San Francisco International Airport): | |||
| (AMT), 5.25%, 5/1/55(3) | 10,000 | 10,551,100 | |
| (AMT), 5.50%, 5/1/55(3) | 10,000 | 10,768,200 | |
| South Jersey Transportation Authority, NJ, 5.25%, 11/1/52 | 1,325 | 1,377,369 | |
| Texas Private Activity Bond Surface Transportation Corp., (North Tarrant Express Segment 3C), (AMT), 5.00%, 6/30/58 | 3,965 | 3,965,866 | |
| Texas Transportation Commission, (State Highway 249 System): | |||
| 0.00%, 8/1/37 | 725 | 448,866 | |
| 0.00%, 8/1/39 | 750 | 413,992 | |
| Virginia Small Business Financing Authority, (95 Express Lanes, LLC), (AMT), 4.00%, 1/1/39 | 1,540 | 1,548,297 | |
| Virginia Small Business Financing Authority, (Transform 66 P3 Project), (AMT), 5.00%, 12/31/52 | 1,000 | 994,170 | |
| $ 133,292,193 | |||
| Security | Principal Amount (000's omitted) | Value | |
| Water and Sewer — 2.4% | |||
| JEA Water and Sewer System Revenue, FL, 5.25%, 10/1/55(3) | $ | 10,000 | $ 10,708,900 |
| $ 10,708,900 | |||
| Total Tax-Exempt Municipal Obligations (identified cost $587,139,217) | $ 605,862,399 | ||
| Taxable Municipal Obligations — 4.5% |
| Security | Principal Amount (000's omitted) | Value | |
| Cogeneration — 0.0%† | |||
| Northampton County Industrial Development Authority, PA, (Northampton Generating), 5.00%, 6/30/27(1) | $ | 347 | $ 62,483 |
| $ 62,483 | |||
| Education — 0.2% | |||
| Maricopa County Industrial Development Authority, AZ, (Grand Canyon University), 7.375%, 10/1/29(2) | $ | 1,000 | $ 1,079,691 |
| $ 1,079,691 | |||
| General Obligations — 1.9% | |||
| Atlantic City, NJ, 7.50%, 3/1/40 | $ | 6,880 | $ 8,125,098 |
| $ 8,125,098 | |||
| Insured - Education — 0.5% | |||
| Onondaga Civic Development Corp., NY, (Upstate Properties Development, Inc.), (BAM), 3.158%, 12/1/41 | $ | 2,745 | $ 2,207,155 |
| $ 2,207,155 | |||
| Insured - Transportation — 1.0% | |||
| Alameda Corridor Transportation Authority, CA: | |||
| (AG), 0.00%, 10/1/48 | $ | 10,765 | $ 2,728,166 |
| (AMBAC), 0.00%, 10/1/32 | 1,285 | 957,764 | |
| (AMBAC), 0.00%, 10/1/33 | 1,000 | 706,967 | |
| $ 4,392,897 | |||
| Lease Revenue/Certificates of Participation — 0.1% | |||
| New Hampshire Business Finance Authority, (Centurion BioSquare, Inc.), 9.58%, 12/15/38 | $ | 250 | $ 258,581 |
| Security | Principal Amount (000's omitted) | Value | |
| Lease Revenue/Certificates of Participation (continued) | |||
| New Hampshire Business Finance Authority, (Centurion Foundation), 11.00%, 12/15/38 | $ | 135 | $ 139,414 |
| $ 397,995 | |||
| Special Tax Revenue — 0.8% | |||
| American Samoa Economic Development Authority, 3.72%, 9/1/27(2) | $ | 735 | $ 722,194 |
| Oneida Indian Nation of New York, 8.00%, 9/1/40(2) | 2,500 | 2,585,742 | |
| $ 3,307,936 | |||
| Student Loan — 0.0%† | |||
| Massachusetts Educational Financing Authority, 4.70%, 1/1/30 | $ | 80 | $ 80,059 |
| $ 80,059 | |||
| Total Taxable Municipal Obligations (identified cost $18,524,472) | $ 19,653,314 | ||
| Short-Term Investments — 1.2% |
| Security | Shares | Value | |
| BlackRock Liquidity Funds - MuniCash, Institutional Shares, 1.72%(7) | 5,436,162 | $ 5,436,706 | |
| Total Short-Term Investments (identified cost $5,436,706) | $ 5,436,706 | ||
| Total Investments — 144.1% (identified cost $611,935,395) | $ 631,615,465 | ||
| Other Assets, Less Liabilities — (44.1)% | $(193,367,043) | ||
| Net Assets — 100.0% | $ 438,248,422 | ||
| The percentage shown for each investment category in the Portfolio of Investments is based on net assets. | |
| † | Amount is less than 0.05% or (0.05)%, as applicable. |
| (1) | Represents a payment-in-kind security which may pay interest in additional principal at the issuer’s discretion. |
| (2) | Security exempt from registration under Rule 144A of the Securities Act of 1933, as amended. These securities may be sold in certain transactions in reliance on an exemption from registration (normally to qualified institutional buyers). At February 28, 2026, the aggregate value of these securities is $44,600,668 or 10.2% of the Trust's net assets. |
| (3) | Security represents the municipal bond held by a trust that issues residual interest bonds. |
| (4) | Security is in default and making only partial interest payments. |
| (5) | When-issued security. |
| (6) | Defaulted security. Issuer has defaulted on the payment of interest and/or principal or has filed bankruptcy and is non-income producing. |
| (7) | The rate shown is the annualized seven-day yield as of February 28, 2026. |
| At February 28, 2026, the concentration of the Trust’s investments in the various states and territories, determined as a percentage of total investments, is as follows: | |
| California | 10.9% |
| New York | 10.6% |
| Others, representing less than 10% individually | 78.4% |
| The Trust invests primarily in debt securities issued by municipalities. The ability of the issuers of the debt securities to meet their obligations may be affected by economic developments in a specific industry or municipality. At February 28, 2026, 17.1% of total investments are backed by bond insurance of various financial institutions and financial guaranty assurance agencies. The aggregate percentage insured by an individual financial institution or financial guaranty assurance agency ranged from 1.3% to 10.7% of total investments. |
| Abbreviations: | |
| AG | – Assured Guaranty, Inc. |
| AMBAC | – AMBAC Financial Group, Inc. |
| AMT | – Interest earned from these securities may be considered a tax preference item for purposes of the Federal Alternative Minimum Tax. |
| BAM | – Build America Mutual Assurance Co. |
| FHLMC | – Federal Home Loan Mortgage Corp. |
| FNMA | – Federal National Mortgage Association |
| GNMA | – Government National Mortgage Association |
| NPFG | – National Public Finance Guarantee Corp. |
| PSF | – Permanent School Fund |
| SFMR | – Single Family Mortgage Revenue |
| • | Level 1 – quoted prices in active markets for identical investments |
| • | Level 2 – other significant observable inputs (including quoted prices for similar investments, interest rates, prepayment speeds, credit risk, etc.) |
| • | Level 3 – significant unobservable inputs (including a fund's own assumptions in determining the fair value of investments) |
| Asset Description | Level 1 | Level 2 | Level 3 | Total |
| Corporate Bonds | $ — | $ 663,046 | $ — | $ 663,046 |
| Tax-Exempt Municipal Obligations | — | 605,862,399 | — | 605,862,399 |
| Taxable Municipal Obligations | — | 19,653,314 | — | 19,653,314 |
| Short-Term Investments | 5,436,706 | — | — | 5,436,706 |
| Total Investments | $5,436,706 | $626,178,759 | $— | $631,615,465 |