MCCAX
MFS California Municipal Bond Fund
MFS Municipal Series Trust

Portfolio concentration

As of March 31, 2026 · N-PORT
Holdings
435
Top-10 weight
12.18%
Effective holdings ?
184
Crowding ?
26.0

Holdings

As of March 31, 2026 · N-PORT
#SecurityTickerSharesValue% of fund
1 MFS Institutional Money Market Portfolio, Class A 33,164,381 $33.16M 4.21%
2 California Community Choice Financing Authority, Series C CCEDEV 9,000,000 $9.34M 1.19%
3 CALIFORNIA COMMUNITY VAR CCEDEV 7,500,000 $8.04M 1.02%
4 LOS ANGELES HSG-A 8,750,000 $7.92M 1.00%
5 CALIFORNIA MUNICIPAL FINANCE AUTHORITY 7,690,000 $7.90M 1.00%
6 OAKLAND UNIF SCH D-A 7,000,000 $7.36M 0.93%
7 Inglewood Joint Powers Authority, Series 2025 6,000,000 $6.33M 0.80%
8 California Housing Finance Agency, Series 2026 ISSUE A 6,000,000 $5.89M 0.75%
9 CALIFORNIA ST HLTH FACS FING AUTH REVENUE CASMED 5,655,000 $5.77M 0.73%
10 CALIFORNIA COMMUNITY VAR CCEDEV 5,000,000 $5.41M 0.69%
11 San Francisco (City & County of), CA Airport Commission (San Francisco International Airport), Second Series 2023 C, Ref. RB 5,000,000 $5.34M 0.68%
12 San Francisco Community College District, Series B 5,000,000 $5.31M 0.67%
13 OAKLAND-D 5,000,000 $5.30M 0.67%
14 California (State of) Community Choice Financing Authority (Green Bonds), Series 2023 C, RB CCEDEV 5,000,000 $5.29M 0.67%
15 California (State of) Community Choice Financing Authority (Green Bonds), Series 2023, RB CCEDEV 5,000,000 $5.23M 0.66%
16 IRVINE CMNTY FACS DT 5,000,000 $5.23M 0.66%
17 San Diego County Regional Airport Authority, Series 2025 B 5,000,000 $5.20M 0.66%
18 SAN LUIS OBISPO PUBLIC FINANCI SLOFIN 12/53 FIXED 5 SLOFIN 5,000,000 $5.19M 0.66%
19 CALIFORNIA ST HLTH FACS FING AUTH REVENUE CASMED 5,000,000 $5.17M 0.66%
20 PUERTO RICO SALES TAX FING COR REGD OID B/E 5.00000000 PRCGEN 5,346,000 $5.08M 0.64%
21 Mt. San Antonio Community College District, Series 2013A 5,000,000 $5.08M 0.64%
22 CA STWD(ENLOE HLTH SYST)/AGM 5.38% 8/15/57 5,000,000 $5.06M 0.64%
23 CA MUNI FIN AUTH-A 5,000,000 $5.00M 0.64%
24 California Housing Finance Agency, Series 2024 ISSUE DD CASMFH 5,000,000 $4.96M 0.63%
25 CALIFORNIA HSG FIN AGY LTD OBLIG MF HSG REVENUE 5,000,000 $4.91M 0.62%
26 CALIFORNIA HSG FIN AGY LTD OBLIG MF HSG REVENUE CASMFH 5,000,000 $4.91M 0.62%
27 CALIFORNIA HSG FIN AGY LTD OBLIG MF HSG REVENUE CASMFH 5,000,000 $4.91M 0.62%
28 North Lake Tahoe Public Financing Authority 5.50% 12/01/2047 NLTGEN 4,425,000 $4.78M 0.61%
29 SANTA CLARA CY 3% 5/1/2039 5,270,000 $4.75M 0.60%
30 New Hampshire Business Finance Authority, Series 4, Class A NFADEV 4,944,643 $4.75M 0.60%
31 Clovis Unified School District, Series C CVSSCD 5,000,000 $4.71M 0.60%
32 Alameda Corridor Transportation Authority, Series C ALATRN 8,195,000 $4.66M 0.59%
33 UNIV OF CA REGENTS -P 5,000,000 $4.52M 0.57%
34 LOS ANGELES DEPT ARPT 5,000,000 $4.46M 0.57%
35 CALIFORNIA ST MUNI FIN AUTH RE CASFIN 01/42 FIXED 5 CASFIN 4,310,000 $4.32M 0.55%
36 CALIFORNIA CMNTY CHOICE FING A REGD B/E 5.25000000 4,000,000 $4.29M 0.54%
37 CALIFORNIA COMMUNITY VAR CCEDEV 4,000,000 $4.28M 0.54%
38 CA ST UNIV-A-REF 4,000,000 $4.28M 0.54%
39 LOS ANGELES CA DEPT OF ARPTS ARPT REVENUE LOSAPT 4,115,000 $4.26M 0.54%
40 San Francisco (City & County of), CA Airport Commission (San Francisco International Airport), Second Series 2024, Ref. RB 4,000,000 $4.26M 0.54%
41 Ceres Unified School District, Series 2025A 4,000,000 $4.17M 0.53%
42 Los Angeles Department of Airports, California, Revenue Bonds, Los Angeles International Airport, Refunding Subordinate Green Series 2025A 4,000,000 $4.17M 0.53%
43 Kerman Public Financing Authority, Series 2025 4,000,000 $4.15M 0.53%
44 San Francisco (City & County of), CA Airport Commission (San Francisco International Airport), Series 2016, RB SFOAPT 4,000,000 $4.00M 0.51%
45 CA ST MFA COP 5.25% 11/1/2052 CASMED 4,000,000 $3.99M 0.51%
46 CA MUNI FIN AUTH-A 4,000,000 $3.99M 0.51%
47 BEVERLY HILLS USD CAB 4,335,000 $3.99M 0.51%
48 REPUBLIC SERVICES INC (MPT) 3.875% 03-01-54 4,000,000 $3.97M 0.50%
49 INDIO PUB FING AUTH-A 3,735,000 $3.93M 0.50%
50 GOLDEN ST TOBACCO SECURITIZATI REGD B/E 5.00000000 GLDGEN 4,000,000 $3.91M 0.50%
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