MFS Municipal Income R6 (MPMNX) NPORT-P MFS New York Municipal Bond Fund (Jun 2024 report)

Quarterly Report

June 30, 2024

MFS^®New York
Municipal Bond Fund

MNY-Q1

Portfolio of Investments

6/30/24 (unaudited)

The Portfolio of Investments is a complete list of all securities owned by your fund. It is categorized by broad-based asset classes.

Issuer		Shares/Par	Value ($)
Municipal Bonds – 96.4%
Airport Revenue – 6.3%
Albany County, NY, Airport Authority Rev., “A”, 5%, 12/15/2043	$	1,500,000	$1,567,845
New York Transportation Development Corp. Special Facilities (LaGuardia Airport Terminal B Redevelopment Project), “A”, 5%, 7/01/2034		900,000	900,894
New York Transportation Development Corp., Special Facilities Rev. (John F. Kennedy International Airport New Terminal One Project), 6%, 6/30/2054		1,000,000	1,098,229
New York Transportation Development Corp., Special Facilities Rev. (John F. Kennedy International Airport New Terminal One Project), AGM, 5.125%, 6/30/2060		2,000,000	2,069,926
New York Transportation Development Corp., Special Facilities Rev. (John F. Kennedy International Airport New Terminal One Project), AGM, 5.25%, 6/30/2060		810,000	848,057
New York Transportation Development Corp., Special Facilities Rev. (LaGuardia Airport, Terminal B Redevelopment), “A”, AGM, 4%, 7/01/2031		2,000,000	1,980,499
New York Transportation Development Corp., Special Facilities Rev. (Terminal 4 John F. Kennedy International Airport Project), “A”, 4%, 12/01/2040		1,500,000	1,466,245
Niagara, NY, Frontier Transportation Authority Rev. (Buffalo-Niagara International Airport), “A”, 5%, 4/01/2038		750,000	771,141
Wayne County, MI, Airport Authority Rev. (Detroit Metropolitan Wayne County Airport), “B”, 5%, 12/01/2044		90,000	90,144
Wayne County, MI, Airport Authority Rev. (Detroit Metropolitan Wayne County Airport), “B”, BAM, 5%, 12/01/2039		15,000	15,046
Wayne County, MI, Airport Authority Rev. (Detroit Metropolitan Wayne County Airport), “C”, 5%, 12/01/2039		80,000	80,128
Wayne County, MI, Airport Authority Rev. (Detroit Metropolitan Wayne County Airport), “C”, 5%, 12/01/2044		130,000	130,085
			$11,018,239
General Obligations - General Purpose – 5.1%
Bridgeview, IL, Stadium and Redevelopment Projects, Taxable, AAC, 5.14%, 12/01/2036	$	615,000	$551,526
Commonwealth of Puerto Rico, General Obligation Restructured Bonds, “A”, 5.625%, 7/01/2029		118,007	126,564
Commonwealth of Puerto Rico, General Obligation Restructured Bonds, “A”, 5.75%, 7/01/2031		114,620	127,278
Commonwealth of Puerto Rico, General Obligation Restructured Bonds, “A”, 4%, 7/01/2033		108,689	108,852
Commonwealth of Puerto Rico, General Obligation Restructured Bonds, “A”, 4%, 7/01/2035		184,514	181,130
Commonwealth of Puerto Rico, General Obligation Restructured Bonds, “A”, 4%, 7/01/2037		83,850	80,717
Commonwealth of Puerto Rico, General Obligation Restructured Bonds, “A”, 4%, 7/01/2041		114,004	106,253
Commonwealth of Puerto Rico, General Obligation Restructured Bonds, “A”, 4%, 7/01/2046		354,563	320,759
Commonwealth of Puerto Rico, General Obligation Restructured Bonds, Capital Appreciation, “A”, 0%, 7/01/2024		17,681	17,681
Commonwealth of Puerto Rico, General Obligation Restructured Bonds, Capital Appreciation, “A”, 0%, 7/01/2033		139,873	93,332
Long Beach, NY, General Obligation, “B”, BAM, 4.625%, 7/15/2052		2,000,000	2,046,688
New York, NY, “B-1”, 3%, 10/01/2044		1,825,000	1,483,057
New York, NY, “J”, FGIC, 5.5%, 2/15/2026		5,000	5,008
New York, NY, General Obligation, “A”, 5%, 8/01/2051		1,500,000	1,617,512
Poughkeepsie, NY, Dutchess County Public Improvement, 5%, 6/01/2031		635,000	641,293
State of Illinois, General Obligation, 5.5%, 5/01/2039		215,000	235,355
State of Illinois, General Obligation, 5.75%, 5/01/2045		200,000	217,220
Yonkers, NY, General Obligation, “F”, BAM, 5%, 11/15/2042		750,000	822,070
			$8,782,295
Healthcare Revenue - Hospitals – 10.6%
Buffalo & Erie County, NY, Industrial Land Development Corp. Rev. (Catholic Health System, Inc. Project), 5%, 7/01/2026	$	450,000	$440,235
Buffalo & Erie County, NY, Industrial Land Development Corp. Rev. (Catholic Health System, Inc. Project), 5%, 7/01/2027		300,000	290,520
Buffalo & Erie County, NY, Industrial Land Development Corp. Rev. (Catholic Health System, Inc. Project), 5%, 7/01/2029		590,000	560,685
California Health Facilities Financing Authority Rev. (Cedars-Sinai Health System), “A”, 5%, 8/15/2051		2,000,000	2,152,901
Dutchess County, NY, Local Development Corp. Rev. (Health Quest Systems, Inc. Project), 4%, 7/01/2041		1,605,000	1,538,089
Jefferson County, NY, Civic Development Corp. Rev. (Samaritan Medical Center), “A”, 5%, 11/01/2037		2,000,000	1,915,588
Monroe County, NY, Industrial Development Corp. Rev. (Rochester General Hospital Project), 5%, 12/01/2046		2,000,000	2,012,280
New York Dormitory Authority Rev. (Montefiore Obligated Group), “A”, 4%, 9/01/2050		1,500,000	1,345,639
New York Dormitory Authority Rev. (Norwell Health Obligated Group), “A”, 4.25%, 5/01/2052		3,000,000	3,001,683
New York Dormitory Authority Rev. (Orange Regional Medical Center Obligated Group Rev.), 5%, 12/01/2035 (n)		800,000	732,459
Westchester County, NY, Health Care Corp. Rev., “B”, 6%, 11/01/2030		120,000	120,155
Westchester County, NY, Local Development Corp. Rev. (New York Blood Center Project), 5%, 7/01/2038		1,000,000	1,085,278
Westchester County, NY, Local Development Corp. Rev. (Westchester Medical Center Obligated Group Project), AGM, 5%, 11/01/2051		1,500,000	1,573,668

1

Portfolio of Investments (unaudited) – continued

Issuer		Shares/Par	Value ($)
Municipal Bonds – continued
Healthcare Revenue - Hospitals – continued
Westchester County, NY, Local Development Corp. Rev. (Westchester Medical Center Obligated Group Project), AGM, 5.75%, 11/01/2053	$	1,500,000	$1,661,139
			$18,430,319
Healthcare Revenue - Long Term Care – 2.7%
Brookhaven, NY, Local Development Corp. Rev. (Active Retirement Community, Inc. d/b/a/ Jefferson's Ferry Project), 5.25%, 11/01/2036	$	1,000,000	$1,026,405
Brookhaven, NY, Local Development Corp. Rev. (Active Retirement Community, Inc. d/b/a/ Jefferson's Ferry Project), “A”, 4%, 11/01/2045		2,000,000	1,807,582
Buffalo & Erie County, NY, Industrial Land Development Corp. Rev. (Orchard Park CCRC, Inc. Project), 5%, 11/15/2037		750,000	755,095
Tompkins County, NY, Development Corp. Continuing Care Retirement Community Rev. (Kendal at Ithaca, Inc. Project), “A”, 5%, 7/01/2044		915,000	915,316
Ulster County, NY, Capital Resource Corp. Rev. (Woodland Pond at New Paltz Project), 4%, 9/15/2025		100,000	97,295
			$4,601,693
Industrial Revenue - Airlines – 5.7%
New York Transportation Development Corp., Special Facilities Rev. (American Airlines, Inc. John F. Kennedy International Airport Project), 3%, 8/01/2031	$	1,500,000	$1,413,325
New York Transportation Development Corp., Special Facilities Rev. (American Airlines, Inc. John F. Kennedy International Airport Project), 5%, 8/01/2031		1,000,000	1,000,187
New York Transportation Development Corp., Special Facilities Rev. (American Airlines, Inc. John F. Kennedy International Airport Project), 5.375%, 8/01/2036		1,035,000	1,102,025
New York Transportation Development Corp., Special Facilities Rev. (Delta Airlines, Inc. LaGuardia Airport Terminals C&D Redevelopment Project), 5%, 1/01/2034		1,000,000	1,031,159
New York Transportation Development Corp., Special Facilities Rev. (Delta Airlines, Inc. LaGuardia Airport Terminals C&D Redevelopment Project), 5.625%, 4/01/2040		3,500,000	3,805,963
New York Transportation Development Corp., Special Facilities Rev. (Delta Airlines, Inc. LaGuardia Airport Terminals C&D Redevelopment Project), 4.375%, 10/01/2045		1,500,000	1,468,879
			$9,821,538
Industrial Revenue - Other – 0.2%
Port Beaumont, TX, Navigation District, Dock & Wharf Facility Rev. (Jefferson Gulf Coast Energy Project), “A”, 3.625%, 1/01/2035 (n)	$	200,000	$181,199
Port Beaumont, TX, Navigation District, Dock & Wharf Facility Rev. (Jefferson Gulf Coast Energy Project), “A”, 2.875%, 1/01/2041 (n)		255,000	194,818
			$376,017
Industrial Revenue - Paper – 0.1%
Build NYC Resource Corp. Solid Waste Disposal Rev. (Pratt Paper, Inc. Project), 4.5%, 1/01/2025 (n)	$	150,000	$150,143
Miscellaneous Revenue - Other – 5.4%
Battery Park, NY, Authority Senior Rev., “A”, 5%, 11/01/2053	$	2,000,000	$2,180,764
Matching Fund Special Purpose Securitization Corp., “A”, 5%, 10/01/2026		90,000	91,971
New York City, NY, Convention Center Development Corp., Capital Appreciation, “B”, AGM, 0%, 11/15/2043		680,000	272,623
New York Liberty Development Corp., Liberty Rev. (3 World Trade Center Project), “1”, 5%, 11/15/2044 (n)		1,940,000	1,941,842
New York Liberty Development Corp., Liberty Rev. (3 World Trade Center Project), “2”, 5.375%, 11/15/2040 (n)		1,500,000	1,504,020
New York, NY, Industrial Development Agency, Airport Facilities Rev. (Transportation Infrastructure Properties LLC), 5%, 7/01/2028		2,095,000	2,089,244
Syracuse, NY, Industrial Development Agency PILOT Rev. (Carousel Center Project), “A”, 5%, 1/01/2034		750,000	567,708
Syracuse, NY, Industrial Development Agency PILOT Rev. (Carousel Center Project), “A”, 5%, 1/01/2036		1,000,000	756,612
			$9,404,784
Multi-Family Housing Revenue – 16.3%
Erie County, NY, Industrial Development Agency Multi-Family (Westchester Park Preservation LP Project), FNMA, 4.25%, 2/01/2041	$	2,000,000	$1,912,689
Monroe County, NY, Industrial Development Agency Multi-Family Mortgage, 4.84%, 11/01/2040		622,535	657,330
Monroe County, NY, Industrial Development Agency Multi-Family Mortgage (Andrews Terrace Community Partners LP Project), “A”, FNMA, 4.72%, 1/01/2044		2,000,000	2,021,600
National Finance Authority, NH, Municipal Certificates, “1-A”, 4.375%, 9/20/2036		646,736	642,672
New York Housing Finance Agency Affordable Housing Rev. (Climate Bond), “B”, 3.7%, 11/01/2038		390,000	377,944

2

Portfolio of Investments (unaudited) – continued

Issuer		Shares/Par	Value ($)
Municipal Bonds – continued
Multi-Family Housing Revenue – continued
New York Housing Finance Agency Affordable Housing Rev., “A-2”, 2.5%, 11/01/2060 (Put Date 5/01/2027)	$	2,000,000	$1,915,167
New York Housing Finance Agency Affordable Housing Rev., “F-1”, 5.1%, 11/01/2052		1,000,000	1,039,135
New York Housing Finance Agency Affordable Housing Rev., “F-1”, 5.15%, 11/01/2057		1,200,000	1,249,144
New York Housing Finance Agency Affordable Housing Rev., “G-1”, HUD Section 8, 4.625%, 11/01/2042		350,000	355,397
New York Housing Finance Agency Affordable Housing Rev., “G-1”, HUD Section 8, 4.8%, 11/01/2047		1,000,000	1,018,165
New York, NY, Housing Development Corp., Multi-Family Housing Rev. (8 Spruce Street), “E”, 3.5%, 2/15/2048		276,686	275,198
New York, NY, Housing Development Corp., Multi-Family Housing Rev. (8 Spruce Street), “F”, 4.5%, 2/15/2048		750,000	748,134
New York, NY, Housing Development Corp., Multi-Family Housing Rev. (Sustainable Development Bonds), “F-1”, 4.6%, 11/01/2042		1,000,000	1,012,218
New York, NY, Housing Development Corp., Multi-Family Housing Rev. (Sustainable Development Bonds), “F-1”, 4.75%, 11/01/2047		500,000	508,297
New York, NY, Housing Development Corp., Multi-Family Housing Rev. (Sustainable Development Bonds), “F-1”, 4.85%, 11/01/2052		500,000	510,149
New York, NY, Housing Development Corp., Multi-Family Housing Rev. (Sustainable Development Bonds), “D”, 4.3%, 11/01/2063 (Put Date 11/01/2028)		500,000	509,501
New York, NY, Housing Development Corp., Multi-Family Housing Rev. (Sustainable Development Bonds), “G”, FHA, 2.45%, 11/01/2045		2,500,000	1,763,615
New York, NY, Housing Development Corp., Multi-Family Housing Rev. (Sustainable Neighborhood Bonds), “A-3-A”, 3.8%, 11/01/2039		1,870,000	1,824,980
New York, NY, Housing Development Corp., Multi-Family Housing Rev. (Sustainable Neighborhood Bonds), “C-1-A”, 3.95%, 11/01/2048		2,610,000	2,411,976
New York, NY, Housing Development Corp., Multi-Family Housing Rev., “C-1”, 4.25%, 11/01/2052		2,500,000	2,402,723
New York, NY, Housing Development Corp., Multi-Family Housing Rev., “F-1”, 2.25%, 11/01/2041		1,535,000	1,097,565
Riverhead, NY, IDA Economic Job Development Corp. Multifamily (River Pointe Apartments Project), FNMA, 4.5%, 2/01/2041		2,000,000	2,023,655
Westchester County, NY, Industrial Development Agency, Multi-Family Housing Rev. (Armory Plaza Housing LP Project),, 4.3%, 6/01/2046 (Put Date 5/01/2041)		2,000,000	1,958,362
			$28,235,616
Port Revenue – 2.2%
New York Liberty Development Corp., Liberty Refunding Rev. (1 World Trade Center Project), 2.75%, 2/15/2044	$	2,000,000	$1,498,425
Port Authority of NY & NJ (221st Series), 4%, 7/15/2055		2,485,000	2,283,279
			$3,781,704
Sales & Excise Tax Revenue – 4.6%
Guam Government Business Privilege Tax Refunding, “F”, 5%, 1/01/2031	$	20,000	$21,327
Guam Government Business Privilege Tax Refunding, “F”, 4%, 1/01/2042		185,000	177,930
Guam Government Business Privilege Tax Rev., “D”, 5%, 11/15/2031		750,000	759,456
Puerto Rico Sales Tax Financing Corp., Restructured Sales Tax Rev., “2019A-1”, 4.55%, 7/01/2040		63,000	63,235
Puerto Rico Sales Tax Financing Corp., Restructured Sales Tax Rev., “2019A-1”, 4.75%, 7/01/2053		200,000	197,088
Puerto Rico Sales Tax Financing Corp., Restructured Sales Tax Rev., “2019A-1”, 5%, 7/01/2058		3,330,000	3,317,036
Puerto Rico Sales Tax Financing Corp., Restructured Sales Tax Rev., “2019A-2”, 4.329%, 7/01/2040		451,000	444,953
Puerto Rico Sales Tax Financing Corp., Restructured Sales Tax Rev., “2019A-2”, 4.329%, 7/01/2040		210,000	207,185
Puerto Rico Sales Tax Financing Corp., Restructured Sales Tax Rev., “2019A-2”, 4.536%, 7/01/2053		4,000	3,809
Puerto Rico Sales Tax Financing Corp., Restructured Sales Tax Rev., “2019A-2”, 4.784%, 7/01/2058		635,000	624,933
Puerto Rico Sales Tax Financing Corp., Restructured Sales Tax Rev., Capital Appreciation, “2019A-1”, 0%, 7/01/2024		3,000	3,000
Puerto Rico Sales Tax Financing Corp., Restructured Sales Tax Rev., Capital Appreciation, “2019A-1”, 0%, 7/01/2029		17,000	14,028
Puerto Rico Sales Tax Financing Corp., Restructured Sales Tax Rev., Capital Appreciation, “2019A-1”, 0%, 7/01/2031		942,000	715,052
Puerto Rico Sales Tax Financing Corp., Restructured Sales Tax Rev., Capital Appreciation, “2019A-1”, 0%, 7/01/2033		904,000	628,493
Puerto Rico Sales Tax Financing Corp., Restructured Sales Tax Rev., Capital Appreciation, “2019A-1”, 0%, 7/01/2046		416,000	133,779
Wisconsin Public Finance Authority Limited Obligation Grant Rev. (American Dream at Meadowlands Project), “A”, 6.25%, 8/01/2027 (a)(d)(n)		545,000	425,100
Wisconsin Public Finance Authority Limited Obligation Grant Rev., Taxable (American Dream at Meadowlands Project), ”A“, 5.625%, 8/01/2024 (a)(d)(n)		255,000	198,900
			$7,935,304
Secondary Schools – 6.0%
Buffalo & Erie County, NY, Industrial Land Development Corp. Rev. (Charter School for Applied Technologies Project), “A”, 5%, 6/01/2035	$	1,000,000	$1,026,014
Build NYC Resource Corp. Rev. (Academic Leadership Charter School Project), 4%, 6/15/2025		220,000	218,472
Build NYC Resource Corp. Rev. (Academic Leadership Charter School Project), 4%, 6/15/2029		320,000	309,772

3

Portfolio of Investments (unaudited) – continued

Issuer		Shares/Par	Value ($)
Municipal Bonds – continued
Secondary Schools – continued
Build NYC Resource Corp. Rev. (Academic Leadership Charter School Project), 4%, 6/15/2036	$	400,000	$379,296
Build NYC Resource Corp. Rev. (Grand Concourse Academy Charter School Project), “A”, 5%, 7/01/2042		550,000	561,904
Build NYC Resource Corp. Rev. (Grand Concourse Academy Charter School Project), “A”, 5%, 7/01/2056		550,000	551,803
Build NYC Resource Corp. Rev. (International Leadership Charter School Project), 6%, 7/01/2043		750,000	750,239
Build NYC Resource Corp. Rev. (KIPP NYC Public Schools Facilities - Canal West Project), 5.25%, 7/01/2052		2,000,000	2,068,566
Build NYC Resource Corp. Rev. (New World Preparatory Charter School Project), “A”, 4%, 6/15/2031 (n)		350,000	337,575
Build NYC Resource Corp. Rev. (New World Preparatory Charter School Project), “A”, 4%, 6/15/2041 (n)		610,000	534,435
Build NYC Resource Corp. Rev. (New World Preparatory Charter School Project), “A”, 4%, 6/15/2051 (n)		1,265,000	1,019,599
Build NYC Resource Corp. Rev. (Packer Collegiate Institute Project), 5%, 6/01/2040		675,000	677,725
Nassau County, NY, Local Economic Assistance Corp., Education Rev. (Friends of Roosevelt Children's Academy Charter School, Inc. Project), “A”, 5%, 7/01/2055		1,000,000	1,002,428
Rensselaer County, NY, Industrial Development Agency, Civic Facility Rev. (Emma Willard School Refunding Project), 5%, 1/01/2034		150,000	151,097
Rensselaer County, NY, Industrial Development Agency, Civic Facility Rev. (Emma Willard School Refunding Project), 5%, 1/01/2035		325,000	327,313
Rensselaer County, NY, Industrial Development Agency, Civic Facility Rev. (Emma Willard School Refunding Project), 5%, 1/01/2036		565,000	568,910
			$10,485,148
Single Family Housing - State – 2.2%
New York Mortgage Agency Homeowner Mortgage Rev., “211”, 3.8%, 10/01/2048	$	385,000	$356,849
New York Mortgage Agency Homeowner Mortgage Rev., “212”, AMT, 3.7%, 10/01/2033		335,000	316,770
New York Mortgage Agency Homeowner Mortgage Rev., “217”, 3.625%, 4/01/2039		355,000	331,021
New York Mortgage Agency Homeowner Mortgage Rev., “239”, 3.25%, 10/01/2051		890,000	861,569
New York Mortgage Agency Homeowner Mortgage Rev., “258”, 4.45%, 10/01/2044		1,000,000	1,001,361
New York Mortgage Agency Homeowner Mortgage Rev., “258”, 4.6%, 10/01/2049		1,000,000	986,972
			$3,854,542
State & Local Agencies – 1.8%
New York Dormitory Authority Rev., State Personal Income Tax Rev., 3%, 3/15/2050	$	1,225,000	$937,852
Yonkers, NY, Industrial Development Agency, School Facility Rev. (New Community School Project), 5%, 5/01/2042		2,000,000	2,150,714
			$3,088,566
Tax - Other – 5.5%
Chicago, IL, Board of Education, Dedicated Capital Improvement Tax Bond, 5.75%, 4/01/2035	$	690,000	$727,173
Chicago, IL, Board of Education, Dedicated Capital Improvement Tax Bond, 5%, 4/01/2045		140,000	148,754
Chicago, IL, Board of Education, Dedicated Capital Improvement Tax Bond, 5.75%, 4/01/2048		325,000	361,545
Glen Cove, NY, Local Economic Assistance Corp. (Garvies Point Public Improvement Project), Capital Appreciation, “B”, 0%, 1/01/2045		1,870,000	539,858
Guam Government Limited Obligation Rev., “A”, 5%, 12/01/2036		100,000	101,916
Guam Government Limited Obligation Rev., “A”, 5%, 12/01/2046		300,000	300,828
New York, NY, Transitional Finance Authority Rev., “C-1”, 4%, 5/01/2045		1,800,000	1,770,495
Triborough Bridge & Tunnel Authority Rev., NY, Payroll Mobility Tax (MTA Bridges and Tunnels), “A-1”, 4%, 5/15/2046		3,350,000	3,285,570
Triborough Bridge & Tunnel Authority Rev., NY, Payroll Mobility Tax (MTA Bridges and Tunnels), “B-1”, 5.25%, 5/15/2054		2,000,000	2,216,447
Wisconsin Public Finance Authority Limited Obligation PILOT Rev. (American Dream at Meadowlands Project), 7%, 12/01/2050		165,000	164,395
			$9,616,981
Tobacco – 2.0%
Buckeye, OH, Tobacco Settlement Financing Authority Senior Asset-Backed Refunding, 2020A-2, “1”, 4%, 6/01/2048	$	695,000	$640,564
Buckeye, OH, Tobacco Settlement Financing Authority Senior Asset-Backed Refunding, 2020B-2, “2”, 5%, 6/01/2055		275,000	253,511
Golden State, CA, Tobacco Securitization Corp., Tobacco Settlement Rev., Taxable, “B-1”, 3.85%, 6/01/2050		615,000	576,794
Tobacco Settlement Asset Securitization Corp., NY, “A”, 5%, 6/01/2035		1,000,000	1,033,169
Tobacco Settlement Asset Securitization Corp., NY, “A”, 5%, 6/01/2036		1,000,000	1,030,179
			$3,534,217
Toll Roads – 1.3%
New York Thruway Authority General Rev., “P”, 5.25%, 1/01/2054	$	2,000,000	$2,201,079

4

Portfolio of Investments (unaudited) – continued

Issuer		Shares/Par	Value ($)
Municipal Bonds – continued
Transportation - Special Tax – 8.5%
Metropolitan Transportation Authority, NY, Refunding Rev. (Climate Bond Certified), “E”, 5%, 11/15/2033	$	2,000,000	$2,169,806
Metropolitan Transportation Authority, NY, Refunding Rev. (Climate Bond Certified), “E”, 4%, 11/15/2045		1,340,000	1,305,926
Metropolitan Transportation Authority, NY, Transportation Refunding Green Rev. (Climate Bond Certified), BAM, 4%, 11/15/2048		2,000,000	1,950,151
Metropolitan Transportation Authority, NY, Transportation Rev., “A”, 4%, 11/15/2052		3,170,000	2,996,549
Metropolitan Transportation Authority, NY, Transportation Rev., “A-2”, FLR, 4.378% (67% of SOFR + 0.8%), 11/01/2032 (Put Date 4/01/2026)		1,500,000	1,499,086
Metropolitan Transportation Authority, NY, Transportation Rev., “B”, BAM, 5%, 11/15/2052		3,100,000	3,205,995
New Jersey Transportation Trust Fund Authority, “A”, 5%, 12/15/2039		185,000	196,002
New Jersey Transportation Trust Fund Authority, “CC”, 5.5%, 6/15/2050		125,000	137,794
New York Transportation Development Corp., Exempt Facility Rev. (State Thruway Service Areas Project), 4%, 10/31/2046		1,000,000	862,000
New York Transportation Development Corp., Exempt Facility Rev. (State Thruway Service Areas Project), 4%, 4/30/2053		435,000	360,991
			$14,684,300
Universities - Colleges – 4.5%
Albany, NY, Capital Resource Corp. Rev. (Albany College of Pharmacy Project), “A”, 5%, 12/01/2033	$	125,000	$125,279
Build NYC Resource Corp. Rev. (Albert Einstein School of Medicine, Inc.), 5.5%, 9/01/2045 (n)		980,000	982,990
Hempstead, NY, Local Development Corp. Rev. (Hofstra University Project), “A”, 3%, 7/01/2051		3,000,000	2,197,102
Monroe County, NY, Industrial Development Corp. Rev. (St. John Fisher University Project), 5.25%, 6/01/2049		635,000	682,904
Monroe County, NY, Industrial Development Corp. Rev. (St. John Fisher University Project), 5.25%, 6/01/2054		850,000	905,676
New York Dormitory Authority, Institute of Technology Rev., 5.25%, 7/01/2049		1,500,000	1,611,272
Oneida County, NY, Local Development Corp. Rev. (Hamilton College Project), 5%, 7/01/2051		750,000	830,406
St. Lawrence County, NY, Industrial Development Agency, Civic Development Corp Rev. (Clarkson University), “B”, 5%, 9/01/2039		200,000	206,431
St. Lawrence County, NY, Industrial Development Agency, Civic Development Corp Rev. (Clarkson University), “B”, 5%, 9/01/2040		150,000	154,257
St. Lawrence County, NY, Industrial Development Agency, Civic Development Corp Rev. (Clarkson University), “B”, 5%, 9/01/2041		100,000	102,538
			$7,798,855
Utilities - Municipal Owned – 0.7%
Guam Power Authority Rev., “A”, AGM, 5%, 10/01/2039	$	155,000	$155,365
Guam Power Authority Rev., “A”, AGM, 5%, 10/01/2044		180,000	180,256
Puerto Rico Electric Power Authority Refunding Rev., “DDD”, 5%, 7/01/2020 (a)(d)		25,000	12,531
Puerto Rico Electric Power Authority Rev., “A”, 5%, 7/01/2029 (a)(d)		675,000	338,344
Puerto Rico Electric Power Authority Rev., “AAA”, 5.25%, 7/01/2021 (a)(d)		50,000	25,063
Puerto Rico Electric Power Authority Rev., “AAA”, 5.25%, 7/01/2030 (a)(d)		25,000	12,531
Puerto Rico Electric Power Authority Rev., “CCC”, 5.25%, 7/01/2027 (a)(d)		250,000	125,312
Puerto Rico Electric Power Authority Rev., “TT”, 5%, 7/01/2021 (a)(d)		115,000	57,644
Puerto Rico Electric Power Authority Rev., “TT”, 5%, 7/01/2027 (a)(d)		20,000	10,025
Puerto Rico Electric Power Authority Rev., “VV”, NPFG, 5.25%, 7/01/2034		30,000	29,679
Puerto Rico Electric Power Authority Rev., “WW”, 5.375%, 7/01/2022 (a)(d)		20,000	10,025
Puerto Rico Electric Power Authority Rev., “WW”, 5.25%, 7/01/2025 (a)(d)		50,000	25,062
Puerto Rico Electric Power Authority Rev., “ZZ”, 5.25%, 7/01/2023 (a)(d)		180,000	90,225
Puerto Rico Electric Power Authority Rev., “ZZ”, 5.25%, 7/01/2024 (a)(d)		55,000	27,569
Puerto Rico Electric Power Authority Rev., “ZZ”, 5.25%, 7/01/2026 (a)(d)		170,000	85,212
Puerto Rico Electric Power Authority Rev., Taxable, “EEE”, 6.05%, 7/01/2032 (a)(d)		140,000	70,175
			$1,255,018
Utilities - Other – 3.0%
Black Belt Energy Gas District, AL, Gas Project Rev. (Project No. 8), “A”, 4%, 12/01/2052 (Put Date 12/01/2029)	$	525,000	$522,703
Black Belt Energy Gas District, AL, Gas Project Rev., “C-1”, 5.25%, 2/01/2053 (Put Date 6/01/2029)		1,265,000	1,335,000
California Community Choice Financing Authority, Clean Energy Project Rev., “C”, 5.25%, 1/01/2054 (Put Date 10/01/2031)		1,210,000	1,275,183
Public Authority for Colorado Energy Natural Gas Purchase Rev., 6.5%, 11/15/2038		1,085,000	1,329,649
Tennergy Corp., TN, Gas Supply Rev., “A”, 5.5%, 10/01/2053 (Put Date 12/01/2030)		705,000	753,258
			$5,215,793

5

Portfolio of Investments (unaudited) – continued

Issuer		Shares/Par	Value ($)
Municipal Bonds – continued
Water & Sewer Utility Revenue – 1.7%
Buffalo, NY, Municipal Water Finance Authority, Water System Rev., “A”, AGM, 4%, 7/01/2046	$	1,500,000	$1,465,914
Great Neck North, NY, Water Authority System Rev., 3%, 11/01/2044		1,340,000	1,114,235
Guam Waterworks Authority Rev. (Water and Wastewater System), “A”, 5%, 1/01/2050		345,000	354,417
Mississippi Development Bank Special Obligation (Jackson Water and Sewer System Rev. Bond Project), AGM, 6.875%, 12/01/2040		100,000	100,359
			$3,034,925
Total Municipal Bonds			$167,307,076
Bonds – 0.4%
Transportation - Services – 0.4%
Toll Road Investors Partnership II LP, Capital Appreciation, NPFG, 0%, 2/15/2025 (n)	$	415,000	$397,834
Toll Road Investors Partnership II LP, Capital Appreciation, NPFG, 0%, 2/15/2043 (n)		909,204	270,852
Total Bonds			$668,686
Contingent Value Instruments – 0.2%
General Obligations - General Purpose – 0.2%
Commonwealth of Puerto Rico, General Obligation Contingent Value Instrument, 11/01/2043	$	481,776	$295,088
Investment Companies (h) – 1.2%
Money Market Funds – 1.2%
MFS Institutional Money Market Portfolio, 5.39% (v)		2,115,732	$2,115,944
Other Assets, Less Liabilities – 1.8%			3,158,928
Net Assets – 100.0%			$173,545,722

(a)	Non-income producing security.
(d)	In default.
(h)	An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate values of the fund's investments in affiliated issuers and in unaffiliated issuers were $2,115,944 and $168,270,850, respectively.
(n)	Securities exempt from registration under Rule 144A of the Securities Act of 1933. These securities may be sold in the ordinary course of business in transactions exempt from registration, normally to qualified institutional buyers. At period end, the aggregate value of these securities was $8,871,766, representing 5.1% of net assets.
(v)	Affiliated issuer that is available only to investment companies managed by MFS. The rate quoted for the MFS Institutional Money Market Portfolio is the annualized seven-day yield of the fund at period end.

The following abbreviations are used in this report and are defined:
AAC	Ambac Assurance Corp.
AGM	Assured Guaranty Municipal
BAM	Build America Mutual
FGIC	Financial Guaranty Insurance Co.
FHA	Federal Housing Administration
FLR	Floating Rate. Interest rate resets periodically based on the parenthetically disclosed reference rate plus a spread (if any). The period-end rate reported may not be the current rate. All reference rates are USD unless otherwise noted.
FNMA	Federal National Mortgage Assn.
NPFG	National Public Finance Guarantee Corp.
SOFR	Secured Overnight Financing Rate

See attached supplemental information. For more information see notes to financial statements as disclosed in the most recent semiannual or annual report.

6

Supplemental Information

6/30/24 (unaudited)

The fund is an investment company and accordingly follows the investment company accounting and reporting guidance of the Financial Accounting Standards Board (FASB) Accounting Standards Codification Topic 946 Financial Services - Investment Companies.

(1) Investment Valuations

Subject to its oversight, the fund's Board of Trustees has delegated primary responsibility for determining or causing to be determined the value of the fund’s investments to MFS as the fund's adviser, pursuant to the fund’s valuation policy and procedures which have been adopted by the adviser and approved by the Board. In accordance with Rule 2a-5 under the Investment Company Act of 1940, the Board of Trustees designated the adviser as the “valuation designee” of the fund. If the adviser, as valuation designee, determines that reliable market quotations are not readily available for an investment, the investment is valued at fair value as determined in good faith by the adviser in accordance with the adviser’s fair valuation policy and procedures.

Under the fund's valuation policy and procedures, debt instruments and floating rate loans, including restricted debt instruments, are generally valued at an evaluated or composite bid as provided by a third-party pricing service. Short-term instruments with a maturity at issuance of 60 days or less may be valued at amortized cost, which approximates market value. Open-end investment companies are generally valued at net asset value per share.

Under the fund’s valuation policy and procedures, market quotations are not considered to be readily available for debt instruments, floating rate loans, and many types of derivatives. These investments are generally valued at fair value based on information from third-party pricing services or otherwise determined by the adviser in accordance with the adviser’s fair valuation policy and procedures. Securities and other assets generally valued on the basis of information from a third-party pricing service may also be valued at a broker/dealer bid quotation. In determining values, third-party pricing services can utilize both transaction data and market information such as yield, quality, coupon rate, maturity, type of issue, trading characteristics, spreads and other market data. An investment may also be valued at fair value if the adviser determines that the investment’s value has been materially affected by events occurring after the close of the exchange or market on which the investment is principally traded (such as foreign exchange or market) and prior to the determination of the fund’s net asset value, or after the halt of trading of a specific security where trading does not resume prior to the close of the exchange or market on which the security is principally traded. The adviser generally relies on third-party pricing services or other information (such as the correlation with price movements of similar securities in the same or other markets; the type, cost and investment characteristics of the security; the business and financial condition of the issuer; and trading and other market data) to assist in determining whether to fair value and at what value to fair value an investment. The value of an investment for purposes of calculating the fund’s net asset value can differ depending on the source and method used to determine value. When fair valuation is used, the value of an investment used to determine the fund’s net asset value may differ from quoted or published prices for the same investment. There can be no assurance that the fund could obtain the fair value assigned to an investment if it were to sell the investment at the same time at which the fund determines its net asset value per share.

Various inputs are used in determining the value of the fund's assets or liabilities. These inputs are categorized into three broad levels. In certain cases, the inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, an investment's level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement. The fund's assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment, and considers factors specific to the investment. Level 1 includes unadjusted quoted prices in active markets for identical assets or liabilities. Level 2 includes other significant observable market-based inputs (including quoted prices for similar securities, interest rates, prepayment speed, and credit risk). Level 3 includes significant unobservable inputs, which may include the adviser's own assumptions in determining the fair value of investments. The following is a summary of the levels used as of June 30, 2024 in valuing the fund's assets and liabilities:

Financial Instruments	Level 1	Level 2	Level 3	Total
Municipal Bonds	$—	$167,602,164	$—	$167,602,164
U.S. Corporate Bonds	—	668,686	—	668,686
Mutual Funds	2,115,944	—	—	2,115,944
Total	$2,115,944	$168,270,850	$—	$170,386,794

For further information regarding security characteristics, see the Portfolio of Investments.

(2) Investments in Affiliated Issuers

An affiliated issuer may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. For the purposes of this report, the following were affiliated issuers:

Affiliated Issuers	Beginning Value	Purchases	Sales Proceeds	Realized Gain (Loss)	Change in Unrealized Appreciation or Depreciation	Ending Value
MFS Institutional Money Market Portfolio	$1,290,035	$10,749,504	$9,923,176	$(396)	$(23)	$2,115,944

7

Supplemental Information (unaudited) – continued

Affiliated Issuers	Dividend Income	Capital Gain Distributions
MFS Institutional Money Market Portfolio	$38,147	$—

(3) Jurisdiction Weightings

Jurisdiction weighting percentages based on net assets, as of June 30, 2024, are as follows:

New York	82.1%
Puerto Rico	5.1%
California	2.3%
Illinois	1.3%
Maine	1.3%
Guam	1.2%
Alabama	1.1%
Colorado	0.8%
Ohio	0.5%
Wisconsin	0.5%
New Hampshire	0.4%
Tennessee	0.4%
Virginia	0.4%
Michigan	0.2%
New Jersey	0.2%
Texas	0.2%
Mississippi	0.1%
U.S. Virgin Islands	0.1%

The jurisdiction weighting percentages include both accrued interest amounts and equivalent exposure from any derivatives holdings, if applicable.

8