MMSTX
MFS Mississippi 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.

Security Shares Dec 2025 Shares Mar 2026 Δ shares End % Δ value
Mississippi Home Corp., Series 2026A 0 500,000 500,000 0.86% $527.59K
Security Shares Dec 2025 Shares Mar 2026 Δ shares End % Δ value
MS MSSDEV 4 09/01/2044 275,000 0 -275,000 0.00% -$266.60K
PUERTO RICO ELECTRIC POWER AUTHORITY 5.0% 07-01-37 120,000 0 -120,000 0.00% -$80.10K

No positions in this category.

Security Shares Dec 2025 Shares Mar 2026 Δ shares End % Δ value
MS MHSG 4.55% 4/1/2042 750,000 745,000 -5,000 1.21% -$26.72K
MFS Institutional Money Market Portfolio, Class A 1,306,812 526,050 -780,761 0.86% -$781.02K
Sunflower County Consolidated School District 1,000,000 500,000 -500,000 0.82% -$515.34K
Alabama Housing Finance Authority, Series 2024A 240,000 230,000 -10,000 0.41% -$13.08K
NFA 2022-1 A 4.375% 09-20-36 235,241 234,341 -900 0.39% -$3.80K
TOLL ROAD INV PART II INSURED 144A 02/43 0.00000 164,899 139,933 -24,966 0.08% -$8.59K
Security Shares Dec 2025 Shares Mar 2026 Δ shares End % Δ value
Jackson County Utility Authority 2,000,000 2,000,000 0 3.28% -$330
Mississippi Home Corp., Series 2024A 1,750,000 1,750,000 0 2.77% -$50.97K
Mississippi Development Bank 1,500,000 1,500,000 0 2.17% -$43.83K
MS MDCEDU 5 06/01/2042 1,250,000 1,250,000 0 2.07% -$5.57K
Medical Center Educational Building Corp. 1,250,000 1,250,000 0 2.05% -$3.33K
MS DEV BK 5.25% 1/1/2034 1,000,000 1,000,000 0 1.82% -$10.67K
W RANKIN UTIL AUTH 1,000,000 1,000,000 0 1.71% -$7.13K
Mississippi Development Bank, Series 2025 1,000,000 1,000,000 0 1.70% -$3.92K
Mississippi Development Bank 1,000,000 1,000,000 0 1.70% -$7.48K
Mississippi Development Bank 1,105,000 1,105,000 0 1.69% -$3.95K
PUERTO RICO SALES TAX FING COR REGD OID B/E 5.00000000 1,086,000 1,086,000 0 1.69% -$13.15K
Mississippi Development Bank, Series 2024 1,000,000 1,000,000 0 1.67% -$16.52K
State of Mississippi, Series 2024 1,000,000 1,000,000 0 1.67% -$17.19K
State of Mississippi, Series 2018A 1,000,000 1,000,000 0 1.66% -$6.86K
Mississippi Development Bank 1,000,000 1,000,000 0 1.65% -$7.99K
MS MSSDEV 5 07/01/2048 1,000,000 1,000,000 0 1.64% -$5.42K
MISSISSIPPI ST HOME CORP SF MTGE REVENUE 1,000,000 1,000,000 0 1.62% $5.55K
Mississippi Development Bank 1,000,000 1,000,000 0 1.59% -$1.61K
Mississippi Home Corp. 1,000,000 1,000,000 0 1.56% -$45.74K
MS HOSP 4% 1/1/2040 1,000,000 1,000,000 0 1.56% -$33.94K
Medical Center Educational Building Corp., Series 2017, Ref. RB 1,000,000 1,000,000 0 1.50% -$23.27K
MS MSSSFH 4.05 12/01/2047 1,000,000 1,000,000 0 1.49% -$25.28K
Medical Center Educational Building Corp., Series 2023, RB 1,000,000 1,000,000 0 1.46% -$38.43K
Mississippi Home Corp. 1,000,000 1,000,000 0 1.35% $17.54K
MASSACHUSETTS ST BAY TRANSPRTN AUTH SALES TAX REVENUE 750,000 750,000 0 1.34% -$8.82K
Warren County, Mississippi, Certificates of Participation, Lease Purchase Jail Project Series 2023 750,000 750,000 0 1.32% -$10.80K
Warren County, Mississippi, Certificates of Participation, Lease Purchase Jail Project Series 2023 750,000 750,000 0 1.31% -$15.04K
Mississippi Development Bank, Series 2024 750,000 750,000 0 1.25% -$8.40K
MS DEV BK SPL/AGM 6.88% 12/1/40 750,000 750,000 0 1.25% $717
MS UNIV EDU CORP-A 750,000 750,000 0 1.25% -$14.97K
MS ST HOME SF 4.8% 12/1/45 750,000 750,000 0 1.24% -$1.96K
MISSISSIPPI ST HOME CORP SF MT REGD B/E GNMA/FN 4.80000000 750,000 750,000 0 1.23% -$3.88K
San Diego Unified School District, Series 2010C 1,020,000 1,020,000 0 1.22% -$16.50K
Mississippi Home Corp., Series 2024 C 750,000 750,000 0 1.22% -$14.17K
Mississippi Home Corp., Series 2024 E 750,000 750,000 0 1.22% -$12.49K
MS MSSDEV 4 06/01/2044 750,000 750,000 0 1.18% -$7.49K
State of Mississippi 770,000 770,000 0 1.17% -$25.77K
Mississippi Development Bank 750,000 750,000 0 1.15% -$1.12K
State of Mississippi, Series 2024 750,000 750,000 0 1.14% -$2.76K
Mississippi State University Educational Building Corp., Series 2024A 750,000 750,000 0 1.09% -$31.22K
S E ENERGY COOP DT 560,000 560,000 0 0.99% -$9.56K
University of Mississippi Educational Building Corp., Series 2017 , Ref. RB 600,000 600,000 0 0.96% -$526
Little Rock School District 700,000 700,000 0 0.86% -$9.58K
Mississippi Development Bank, Series 2025 500,000 500,000 0 0.86% -$216
WARREN CO-A-REF-REMK 500,000 500,000 0 0.84% -$3.79K
Mississippi Development Bank, Special Obligation Bonds, Lamar County School District Series 2025 500,000 500,000 0 0.84% -$6.48K
Mississippi Development Bank, Series 2025 500,000 500,000 0 0.84% -$5.71K
MS MSSSFH 5.12 12/01/2045 500,000 500,000 0 0.83% -$496
MS ST HOSP AUTH-SER C 500,000 500,000 0 0.83% -$5.53K
GULFPORT MS HOSP FAC REVENUE 500,000 500,000 0 0.83% -$12.96K
MISSISSIPPI ST DEV BANK SPL OBLG 500,000 500,000 0 0.82% -$3.14K
MISSISSIPPI ST BUSINESS FIN CORP SOL WST DISP REVENUE 500,000 500,000 0 0.82% $1.40K
Mississippi Development Bank 500,000 500,000 0 0.82% $94
California (State of) Community Choice Financing Authority (Green Bonds), Series 2023 C, RB 460,000 460,000 0 0.80% -$2.18K
Mississippi Development Bank, Series 2018 460,000 460,000 0 0.78% -$3.71K
NY TRANS CORP(JFK INT NEW ONE)/AGM 5.13% 6/30/60@ 475,000 475,000 0 0.77% -$5.63K
Mississippi Development Bank, Series 2024 500,000 500,000 0 0.77% -$6.92K
Hinds County, MS COP (Lease Purchase) (BAM Insured) 500,000 500,000 0 0.75% -$4.03K
Mississippi Development Bank 500,000 500,000 0 0.74% -$1.65K
Mississippi Development Bank 500,000 500,000 0 0.69% -$5.40K
NEW YORK CITY NY HSG 580,000 580,000 0 0.67% $1.62K
TRIBOROUGH NY BRIDGE & TUNNEL AUTH PAYROLL MOBILITY TAX 545,000 545,000 0 0.65% -$468
Mississippi (State of) Development Bank (Jackson County Gomesa), Series 2021, RB 425,000 425,000 0 0.65% -$6.32K
VIRGINIA ST HSG DEV AUTH 385,000 385,000 0 0.64% -$3.29K
Mississippi Development Bank 435,000 435,000 0 0.62% -$13.95K
MS CANEDU 5.25 01/01/2045 350,000 350,000 0 0.61% -$1.66K
CHICAGO ILLIN 5.75% 4/1/2035 350,000 350,000 0 0.58% -$3.45K
Mississippi Development Bank, Series 2024 350,000 350,000 0 0.54% -$813
SYSTEM ENERGY RESOURCES INC 2.375% 06-01-44 500,000 500,000 0 0.53% -$910
TEXAS MUNICIPAL POWER AGENCY AG 2.0% 09-01-33 355,000 355,000 0 0.51% -$5.52K
PENNSYLVANIA ST ECON DEV FING REGD OID B/E AMT AG 5.00000000 310,000 310,000 0 0.51% $3.56K
MASS DEVEL FIN 4% 7/1/2051 370,000 370,000 0 0.49% -$6.07K
MS PEA 4.75 09/01/2038 275,000 275,000 0 0.48% -$5.54K
PUERTO RICO SALES TAX FING COR REGD ZCP OID B/E 0.00000000 346,000 346,000 0 0.47% $3.33K
TENNERGY CORP TN GAS REVENUE TGYPWR 10/53 ADJUSTABLE VAR 265,000 265,000 0 0.46% -$2.54K
WI PUBTRN 5.75 12/31/2065 270,000 270,000 0 0.45% -$2.48K
PUERTO RICO SALES TAX FING COR REGD ZCP OID B/E 0.00000000 330,000 330,000 0 0.42% $3.67K
NY TRANS CORP 5% 7/1/34 @ 230,000 230,000 0 0.38% $19
VIRGINIA ST SMALL BUSINESS FIN REGD OID B/E AMT 3.00000000 280,000 280,000 0 0.37% -$5.70K
BUCKEYE TOBACCO SETTLEMENT FIN BUCGEN 06/48 FIXED 4 265,000 265,000 0 0.36% -$6.93K
RESTRUCTURED-SER A-2 234,000 234,000 0 0.35% -$2.42K
Southeast Energy Authority, Alabama, A Cooperative District Energy Supply Revenue Bonds Series 2024A 210,000 210,000 0 0.35% -$8.49K
NY NYCDEV 5 11/15/2044 210,000 210,000 0 0.34% $341
Village of Bridgeview 220,000 220,000 0 0.34% -$430
VIRGIN ISLANDS HOTEL DEV FING REGD OID B/E 6.00000000 180,000 180,000 0 0.29% -$1.97K
GOLDEN ST TOBACCO SEC 190,000 190,000 0 0.28% -$34
RESTRUCTURED-SER A-2 162,000 162,000 0 0.26% $1.15K
State of Illinois, Series 2020 150,000 150,000 0 0.26% -$2.45K
CHICAGO IL BRD OF EDU DEDICATE REGD B/E 5.75000000 150,000 150,000 0 0.26% -$486
GUAM GVT WTSW 5% 1/1/2046 145,000 145,000 0 0.24% $22
Guam (Territory of) Waterworks Authority, Series 2020 A, RB 120,000 120,000 0 0.20% $674
PUERTO RICO ELECTRIC POWER AUTHORITY 5.0% 07-01-29 180,000 180,000 0 0.20% -$675
RESTRUCTURED-SER A1 128,406 128,406 0 0.18% -$1.83K
Puerto Rico Electric Power Authority, Series VV 105,000 105,000 0 0.17% -$255
Puerto Rico, General Obligation Bonds, Vintage CW NT Claims Taxable Series 2022 146,208 146,208 0 0.16% $4.39K
IOWASTUD LIQUID 3.5% 12/1/2044 @ 110,000 110,000 0 0.14% -$1.44K
Wisconsin (State of) Public Finance Authority (American Dream at Meadowlands), Series 2017, RB 115,000 115,000 0 0.14% -$8.05K
Port of Beaumont Navigation District 100,000 100,000 0 0.12% -$2.75K
RESTRUCTURED-SER A-2- 71,000 71,000 0 0.11% $506
State of Illinois, Series 2023B 65,000 65,000 0 0.11% -$765
Territory of Guam, Series F 70,000 70,000 0 0.11% -$891
PUERTO RICO SALES TAX FING COR REGD OID B/E 4.75000000 71,000 71,000 0 0.11% -$808
RESTRUCTURED-SER A1 66,803 66,803 0 0.11% $172
CHICAGO IL BRD OF EDU DEDICATED CAPITAL IMPT TAX 65,000 65,000 0 0.11% $748
Puerto Rico Electric Power Authority, Series UU 60,000 60,000 0 0.10% $191
DENVER CO ARPT 4.125% 11/15/2047 @ 60,000 60,000 0 0.09% -$853
PUERTO RICO SALES TAX FING COR REGD ZCP OID B/E 0.00000000 150,000 150,000 0 0.09% $2.45K
DENVER CO ARPT 4.13% 11/15/53@ 55,000 55,000 0 0.08% -$1.91K
RESTRUCTURED-SER A1 40,029 40,029 0 0.07% -$274
RESTRUCTURED-SER A1 41,212 41,212 0 0.07% -$153
RESTRUCTURED-SER A1 37,958 37,958 0 0.06% -$58
RESTRUCTURED-SER A1 39,814 39,814 0 0.06% $33
RESTRUCTURED-CABS-SER 48,848 48,848 0 0.06% $102
MATCHING FUND SPL PURPOSE SECURITIZTN CORP 35,000 35,000 0 0.06% -$131
S ANTONIO TEX 4.45% 4/1/2043 30,000 30,000 0 0.05% -$390
RESTRUCTURED-SER A1 29,283 29,283 0 0.05% -$113
PUERTO RICO SALES TAX FING COR REGD OID B/E 4.55000000 20,000 20,000 0 0.03% -$86
CO ST HLTH FACS AUTH 20,000 20,000 0 0.03% -$60
Puerto Rico Electric Power Authority, Series SS 15,000 15,000 0 0.02% -$15
REF-SER VV-NATL NON 10,000 10,000 0 0.02% -$187
IOWASTUD LIQUID 3% 12/1/2039 @ 10,000 10,000 0 0.02% -$11
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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