MBWVX
MFS West Virginia Municipal Bond Fund
MFS Municipal Series Trust

Portfolio moves

Net position changes between two of this fund's N-PORT snapshots. These are differences between point-in-time reports — not a trade log — and share counts can be affected by splits and other corporate actions.

Dec 31, 2025 → Mar 31, 2026

Expand a category to see the positions behind it, ranked by weight.

No positions in this category.

Security Shares Dec 2025 Shares Mar 2026 Δ shares End % Δ value
PUERTO RICO ELECTRIC POWER AUTHORITY 5.0% 07-01-29 150,000 0 -150,000 0.00% -$100.12K
PUERTO RICO ELECTRIC POWER AUTHORITY 5.0% 07-01-37 145,000 0 -145,000 0.00% -$96.79K
Security Shares Dec 2025 Shares Mar 2026 Δ shares End % Δ value
MFS Institutional Money Market Portfolio, Class A 1,236,911 1,321,086 84,175 1.61% $83.93K
Security Shares Dec 2025 Shares Mar 2026 Δ shares End % Δ value
West Virginia Lottery Excess Lottery 1,500,000 1,050,000 -450,000 1.25% -$472.80K
West Virginia University 1,280,000 875,000 -405,000 1.08% -$419.06K
West Virginia University 1,000,000 500,000 -500,000 0.63% -$524.51K
City of Chicago, Series 2023 A 360,000 335,000 -25,000 0.42% -$27.73K
NFA 2022-1 A 4.375% 09-20-36 275,168 274,115 -1,052 0.34% -$4.45K
TOLL ROAD INV PART II INSURED 144A 02/43 0.00000 219,865 186,577 -33,288 0.08% -$11.45K
Security Shares Dec 2025 Shares Mar 2026 Δ shares End % Δ value
West Virginia (State of) (Bidding Group 2), Series 2019 A, GO Bonds 2,000,000 2,000,000 0 2.50% -$11.41K
Morgantown Utility Board, Inc., Series 2018 B, RB 2,000,000 2,000,000 0 2.50% $3.31K
West Virginia University 2,000,000 2,000,000 0 2.47% -$14.55K
WV HOSP 4% 6/1/2051 2,220,000 2,220,000 0 2.36% -$83.14K
PUERTO RICO SALES TAX FING COR REGD OID B/E 5.00000000 1,842,000 1,842,000 0 2.13% -$22.30K
WV HOSP 5% 9/1/2039 1,500,000 1,500,000 0 1.85% -$16.34K
WV ST WTR 5% 11/1/2033 1,475,000 1,475,000 0 1.81% -$6.32K
WEST VIRGINIA ST 1,225,000 1,225,000 0 1.59% -$18.46K
City of Wheeling, Series 2021 A 1,500,000 1,500,000 0 1.57% -$42.48K
MARSHALL UNIV WV 1,500,000 1,500,000 0 1.55% -$46.24K
Fairmont State University 1,050,000 1,050,000 0 1.40% -$22.67K
West Virginia Economic Development Authority 1,120,000 1,120,000 0 1.37% $167
West Virginia Economic Development Authority, Series 2023 A-1 1,000,000 1,000,000 0 1.28% $3.36K
W VIRGINIA ST H-SER B 1,000,000 1,000,000 0 1.28% -$19.22K
Ohio County Commission, West Virginia, Special District Excise Tax Revenue Bonds, Fort Henry Economic Opportunity Development District-the Highlands P 1,000,000 1,000,000 0 1.27% -$20.13K
WHEELING WV WTRWKS & SWR SYS R REGD B/E BAM 5.25000000 1,000,000 1,000,000 0 1.26% -$7.71K
WEST VIRGINIA ST ECON DEV AUTH EXCESS LOTTERY REVENUE 1,000,000 1,000,000 0 1.26% -$7.53K
West Virginia (State of) (Bidding Group 2), Series 2019 A, GO Bonds 1,000,000 1,000,000 0 1.26% -$4.77K
Berkeley County Board of Education 1,000,000 1,000,000 0 1.24% -$20.03K
West Virginia Housing Development Fund 1,000,000 1,000,000 0 1.24% -$14.19K
West Virginia Housing Development Fund, Series 2023D 1,000,000 1,000,000 0 1.23% -$4.60K
WEST VIRGINIA ST HOSP FIN AUTH 1,000,000 1,000,000 0 1.23% $2.94K
West Virginia Housing Development Fund, Series 2023D 1,000,000 1,000,000 0 1.22% -$10.67K
WEST VIRGINIA ST HSG DEV FUND 1,000,000 1,000,000 0 1.22% -$10.76K
Wood County Board of Education, Series 2023 1,000,000 1,000,000 0 1.22% -$18.96K
West Virginia Housing Development Fund, Series 2025A 1,000,000 1,000,000 0 1.22% -$9.56K
WV HOSP FIN AUTH-A 1,000,000 1,000,000 0 1.22% $3
West Virginia Housing Development Fund 1,000,000 1,000,000 0 1.22% -$5.06K
West Virginia Hospital Finance Authority 1,000,000 1,000,000 0 1.22% $64
West Virginia Housing Development Fund 1,000,000 1,000,000 0 1.21% -$2.30K
Ohio County, WV Commission TIF Rev. Refg. (Highlands) 1,000,000 1,000,000 0 1.18% -$17.46K
WEST VIRGINIA ST HSG DEV FUND 1,000,000 1,000,000 0 1.18% -$16.84K
Berkeley County Public Service Sewer District, Series 2025A 1,000,000 1,000,000 0 1.17% -$16.81K
WEST VIRGINIA ST HOSP FIN AUTH WVSMED 01/47 FIXED OID 4.125 1,245,000 1,245,000 0 1.17% -$22.47K
West Virginia Housing Development Fund, Series 2024D 1,000,000 1,000,000 0 1.16% -$36.59K
Berkeley County Public Service District, Series 2025 A 1,000,000 1,000,000 0 1.16% -$32.95K
Berkeley County Public Service Sewer District, Series 2025A 1,000,000 1,000,000 0 1.15% -$24.07K
Greenbrier Public Service District No. 1 1,000,000 1,000,000 0 1.13% -$41.55K
West Virginia Housing Development Fund 1,000,000 1,000,000 0 1.13% -$27.32K
W VA HOSP FIN AUTH-A 1,000,000 1,000,000 0 1.12% -$4.69K
WV PARKWAYS AUTH 1,000,000 1,000,000 0 1.11% -$9.60K
Monongalia County, West Virginia, Tax Increment Revenue Bonds, University Town Centre Development District 4, Senior Refunding and Improvement Series 875,000 875,000 0 1.11% -$6.70K
VIRGIN ISLANDS PUBLIC FIN AUTH VITGEN 10/32 FIXED 5 900,000 900,000 0 1.10% -$14
NJ TRANSPRTN TRUST-AA 1,000,000 1,000,000 0 1.10% $3.84K
MONONGALIA RV 4.125% 6/1/2043 920,000 920,000 0 1.02% $21.59K
West Virginia Hospital Finance Authority 795,000 795,000 0 0.97% -$79
Ohio County Commission, West Virginia, Special District Excise Tax Revenue Bonds, Fort Henry Economic Opportunity Development District-the Highlands P 750,000 750,000 0 0.96% -$8.07K
W VIRGINIA HOSP FIN-A 750,000 750,000 0 0.95% -$14.52K
Morgantown Building Commission, Series 2023 A 790,000 790,000 0 0.95% $9.03K
PARKERSBURG WV MUNI BLDG COMMI REGD OID B/E 4.37500000 850,000 850,000 0 0.93% -$37.12K
Jefferson County Building Commission, Series 2025 750,000 750,000 0 0.93% -$8.14K
Jefferson County Building Commission, Series 2025 750,000 750,000 0 0.93% -$3.42K
Marshall University, Series 2020 A, Ref. RB 1,000,000 1,000,000 0 0.92% -$33.20K
West Virginia Hospital Finance Authority, Series 2025A 750,000 750,000 0 0.91% -$9.43K
Berkeley County Board of Education 750,000 750,000 0 0.91% -$524
State of West Virginia 705,000 705,000 0 0.90% -$4.03K
WV HOSP 4% 6/1/51 860,000 860,000 0 0.89% -$16.17K
West Virginia Housing Development Fund 700,000 700,000 0 0.84% -$9.74K
West Virginia Housing Development Fund 710,000 710,000 0 0.80% -$6.87K
Little Rock School District 820,000 820,000 0 0.75% -$11.23K
BLACK BELT ENERGY GAS VAR 565,000 565,000 0 0.72% -$3.80K
California (State of) Community Choice Financing Authority (Green Bonds), Series 2023 C, RB 560,000 560,000 0 0.72% -$2.65K
NY NYCDEV 5 11/15/2044 580,000 580,000 0 0.71% $941
WV HOSP 5.375% 9/1/2053 525,000 525,000 0 0.66% -$13.48K
Southeast Energy Authority, Alabama, Commodity Supply Revenue Bonds, Project 5, Series 2023A 510,000 510,000 0 0.65% -$2.48K
Morgantown Building Commission, Series 2023 A 540,000 540,000 0 0.63% -$4.08K
Putnam County Building Commission 560,000 560,000 0 0.62% -$26.51K
WV EDA SLD WAST 4.625% 4/15/2055 @ MT 500,000 500,000 0 0.62% $2.25K
West Virginia Economic Development Authority 500,000 500,000 0 0.61% $68
Putnam County Building Commission 500,000 500,000 0 0.61% -$5.22K
Morgantown Building Commission, Series 2025 A 500,000 500,000 0 0.60% -$1.64K
West Virginia Housing Development Fund 485,000 485,000 0 0.59% $2.62K
Putnam County Building Commission 500,000 500,000 0 0.57% -$12.01K
City of Morgantown 455,000 455,000 0 0.55% -$2.74K
NY TRANS CORP(JFK INT NEW ONE)/AGM 5.25% 6/30/60@ 445,000 445,000 0 0.54% -$4.10K
Public Energy Authority of Kentucky, Gas Supply Revenue Bonds, Series 2025B 415,000 415,000 0 0.51% -$11.40K
VIRGINIA ST SMALL BUSINESS FIN VIRGINIA SMALL BUSINESS FINANCING AUTHORITY 490,000 490,000 0 0.51% -$10.90K
WI PUBTRN 5.75 12/31/2065 365,000 365,000 0 0.45% -$3.36K
PUERTO RICO SALES TAX FING COR REGD ZCP OID B/E 0.00000000 412,000 412,000 0 0.42% $3.97K
TENNERGY CORP TN GAS REVENUE TGYPWR 10/53 ADJUSTABLE VAR 310,000 310,000 0 0.40% -$2.98K
Southeast Energy Authority, Alabama, A Cooperative District Energy Supply Revenue Bonds Series 2024A 315,000 315,000 0 0.39% -$12.73K
PUERTO RICO SALES TAX FING COR REGD ZCP OID B/E 0.00000000 396,000 396,000 0 0.37% $4.40K
Anaheim City School District 310,000 310,000 0 0.35% -$8.07K
VIRGINIA ST SMALL BUSINESS FIN REGD OID B/E AMT 3.00000000 325,000 325,000 0 0.32% -$6.61K
West Virginia Housing Development Fund 285,000 285,000 0 0.32% -$12.87K
OH BUCGEN 5 06/01/2055 320,000 320,000 0 0.31% -$998
Village of Bridgeview 260,000 260,000 0 0.30% -$508
VIRGIN ISLANDS HOTEL DEV FING REGD OID B/E 6.00000000 245,000 245,000 0 0.29% -$2.68K
WV HOSP 4% 1/1/2038 230,000 230,000 0 0.24% -$7.20K
GOLDEN ST TOBACCO SEC 220,000 220,000 0 0.24% -$39
WEST VIRGINIA ST HOSP FIN AUTH WVSMED 06/27 FIXED 5 200,000 200,000 0 0.24% -$995
CHICAGO IL BRD OF EDU DEDICATE REGD B/E 5.75000000 175,000 175,000 0 0.22% -$567
GUAM GVT WTSW 5% 1/1/2046 180,000 180,000 0 0.22% $27
State of Illinois, Series 2020 165,000 165,000 0 0.21% -$2.70K
RESTRUCTURED-SER A-2 158,000 158,000 0 0.19% $1.13K
State of Illinois, Series 2020C 155,000 155,000 0 0.18% -$4.66K
ALLGNY CNTY HDA 4% 4/1/2044 155,000 155,000 0 0.17% -$2.91K
Guam (Territory of) Waterworks Authority, Series 2020 A, RB 135,000 135,000 0 0.17% $758
Puerto Rico Electric Power Authority, Series VV 135,000 135,000 0 0.17% -$328
NY LIBERTY DEV CORP 170,000 170,000 0 0.15% -$2.99K
RESTRUCTURED-SER A1 143,435 143,435 0 0.15% -$2.05K
Puerto Rico, General Obligation Bonds, Vintage CW NT Claims Taxable Series 2022 156,906 156,906 0 0.13% $4.71K
BUCKEYE TOBACCO SETTLEMENT FIN BUCGEN 06/48 FIXED 4 125,000 125,000 0 0.13% -$3.27K
Wisconsin (State of) Public Finance Authority (American Dream at Meadowlands), Series 2017, RB 120,000 120,000 0 0.11% -$8.40K
RESTRUCTURED-SER A-2- 83,000 83,000 0 0.10% $591
Port of Beaumont Navigation District 115,000 115,000 0 0.10% -$3.16K
UNIVERSIDAD INTERAMERICANA DE PUERTO RICO INC 5.0% 10-01-31 80,000 80,000 0 0.10% $1
PUERTO RICO SALES TAX FING COR REGD OID B/E 4.75000000 83,000 83,000 0 0.09% -$944
MS DEV BK SPL/AGM 6.88% 12/1/40 75,000 75,000 0 0.09% $72
RESTRUCTURED-SER A1 74,630 74,630 0 0.09% $192
Territory of Guam, Series F 75,000 75,000 0 0.09% -$955
PUERTO RICO ELECTRIC POWER AUTHORITY 5.25% 07-01-27 100,000 100,000 0 0.08% -$375
CHICAGO IL BRD OF EDU DEDICATED CAPITAL IMPT TAX 65,000 65,000 0 0.08% $748
PUERTO RICO SALES TAX FING COR REGD ZCP OID B/E 0.00000000 186,000 186,000 0 0.08% $3.04K
State of Illinois, Series C 70,000 70,000 0 0.08% -$2.28K
RESTRUCTURED-SER A1 42,958 42,958 0 0.06% -$294
RESTRUCTURED-SER A1 44,227 44,227 0 0.06% -$164
RESTRUCTURED-SER A1 40,735 40,735 0 0.05% -$63
MATCHING FUND SPL PURPOSE SECURITIZTN CORP 40,000 40,000 0 0.05% -$149
RESTRUCTURED-SER A1 42,727 42,727 0 0.05% $35
RESTRUCTURED-CABS-SER 52,422 52,422 0 0.05% $109
RESTRUCTURED-SER A-2 39,000 39,000 0 0.04% -$403
S ANTONIO TEX 4.45% 4/1/2043 35,000 35,000 0 0.04% -$455
RESTRUCTURED-SER A1 31,426 31,426 0 0.04% -$122
PUERTO RICO SALES TAX FING COR REGD OID B/E 4.55000000 25,000 25,000 0 0.03% -$107
REF-SER VV-NATL NON 10,000 10,000 0 0.01% -$187
UNIVERSITY OF PENNSYLVANIA HEALTH SYSTEM OBLIGATED GROUP 4.0% 07-01-45 10,000 10,000 0 0.01% -$175
PUERTO RICO SALES TAX FING COR REGD ZCP OID B/E 0.00000000 7,000 7,000 0 0.01% $72
RESTRUCTURED-SER A-2 1,000 1,000 0 0.00% -$12

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