MFPAX
MFS Pennsylvania Municipal Bond Fund
MFS Municipal Series Trust

Portfolio concentration

As of March 31, 2026 · N-PORT
Holdings
243
Top-10 weight
10.26%
Effective holdings ?
176
Crowding ?
18.8

Holdings

As of March 31, 2026 · N-PORT
#SecurityTickerSharesValue% of fund
1 Indiana County Industrial Development Authority, Pennsylvania, Revenue Bonds, Foundation for Indiana University of Pennsylvania Project, Refunding Ser 2,750,000 $2.41M 1.28%
2 Southeastern Pennsylvania Transportation Authority, Revenue Bonds, Asset Improvement Series 2022 SEPTRN 2,000,000 $2.08M 1.10%
3 Pennsylvania State University (The), Series 2022A 2,000,000 $2.08M 1.10%
4 Philadelphia (City of), PA, Series 2025, RB 2,000,000 $1.99M 1.05%
5 Bucks County Water and Sewer Authority, Pennsylvania, Sewer System Revenue Bonds, Series 2022A 2,000,000 $1.95M 1.03%
6 MONTGOMERY HGR EDU-B 2,000,000 $1.87M 0.99%
7 PENNSYLVANIA ST HGR EDUCTNL FACS AUTH REVENUE PASHGR 1,750,000 $1.78M 0.94%
8 Chester County Health and Education Facilities Authority 1,750,000 $1.75M 0.93%
9 Pennsylvania Housing Finance Agency, Single Family Mortgage, Series 2026-152A 1,500,000 $1.68M 0.89%
10 MFS Institutional Money Market Portfolio, Class A 1,629,587 $1.63M 0.86%
11 INTER PA 458436 5.50% 8/15/2063 1,500,000 $1.58M 0.84%
12 Pennsylvania Housing Finance Agency 1,545,000 $1.56M 0.83%
13 PHIL PA GAS/AGM 5.25% 8/1/54 1,500,000 $1.56M 0.82%
14 ALLEG PA SWR 5% 12/1/2050 1,500,000 $1.54M 0.82%
15 BRISTOL TWP PA SCH DIST 1,500,000 $1.54M 0.82%
16 School District of Philadelphia (The), Series 2019A PHISCD 1,500,000 $1.54M 0.81%
17 PENNSYLVANIA ST HSG FIN AGY SF MTGE REVENUE 1,500,000 $1.53M 0.81%
18 SCHOOL DISTRICT OF PHILADELPHIA THE 1,495,000 $1.50M 0.80%
19 WILKES-BARRE PA AREA SCH DIST 1,500,000 $1.50M 0.79%
20 PENNSYLVANIA ST HSG FIN AGY MF HSG REVENUE 1,490,000 $1.50M 0.79%
21 Pennsylvania Housing Finance Agency, Series 2026, RB 1,500,000 $1.47M 0.78%
22 Chester County School Authority, Series 2024 1,375,000 $1.45M 0.76%
23 PENNSYLVANIA ST HSG FIN AGY SF REGD B/E 6.00000000 1,335,000 $1.44M 0.76%
24 Cheltenham Township School District, Series 2026 1,395,000 $1.43M 0.76%
25 Pittsburgh, Pennsylvania, General Obligation Bonds, Capital Improvement Series 2025 1,450,000 $1.38M 0.73%
26 TOWER HEALTH OBLIGATED GROUP 5.0% 06-30-39 BERFAC 1,470,000 $1.38M 0.73%
27 TEMPLE UNIV-REF-FIRST 1,285,000 $1.36M 0.72%
28 Pennsylvania Turnpike Commission, Series 2019A PASTRN 1,500,000 $1.36M 0.72%
29 Moon Area School District, Series 2024 B 1,500,000 $1.35M 0.72%
30 Chester (County of), PA Industrial Development Authority (University Student Housing, LLC at West Chester University of Pennsylvania) 1,500,000 $1.33M 0.70%
31 WESTMORELAND PA 4% 7/1/2037 1,400,000 $1.32M 0.70%
32 Philadelphia (City of), PA Authority for Industrial Development (University Square Apartments), Series 2017, RB 1,250,000 $1.27M 0.67%
33 ST PUB SCH BLDG AUTH 1,200,000 $1.27M 0.67%
34 PENNSYLVANIA ST ECON DEV FINGA REGD OID B/E AG 4.00000000 1,300,000 $1.26M 0.67%
35 NYC TRANSITIONAL FIN 1,320,000 $1.25M 0.66%
36 PENNSYLVANIA ST HSG FIN AGY SF REGD B/E 5.50000000 1,170,000 $1.23M 0.65%
37 William Penn School District Authority, Series 2025A 1,200,000 $1.18M 0.63%
38 Pennsylvania Higher Education Assistance Agency, Education Loan Revenue Bonds, Senior Series 2022A 1,155,000 $1.15M 0.61%
39 PENNSYLVANIA ST HSG FIN AGY SF REGD B/E 5.75000000 1,075,000 $1.14M 0.60%
40 Clemson University 1,500,000 $1.11M 0.59%
41 PENNSYLVANIA ST ECON DEV FING AUTH SOLID WASTE DISPOSAL REV 1,000,000 $1.10M 0.58%
42 BETHEL PK SD 1,000,000 $1.07M 0.57%
43 PENNSYLVANIA ST HGR EDUCTNL FA REGD B/E 5.50000000 1,000,000 $1.06M 0.56%
44 PHIL PA WTR/AGM 5.5% 9/1/53 1,000,000 $1.06M 0.56%
45 Pennsylvania Turnpike Commission, Series 2025B 1,000,000 $1.06M 0.56%
46 BETHLEHEM ASD 1,000,000 $1.05M 0.56%
47 Pennsylvania Turnpike Commission, Series 2025 A 1,000,000 $1.05M 0.56%
48 ALLEG PA ARPT 5.50% 1/1/2050 @ 1,000,000 $1.05M 0.55%
49 PENNSBURY SD 1,000,000 $1.05M 0.55%
50 PENNSYLVANIA ST HGR EDUCTNL FA REGD B/E AG 5.25000000 1,000,000 $1.04M 0.55%
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