# MFS California Municipal Bond Fund

MFS California Municipal Bond Fund is a registered fund series of MFS Municipal Series Trust (series S000002530). Net assets $788.1M as of 2026-03-31.

## Profile

- Series ID: S000002530
- Registrant: MFS Municipal Series Trust
- LEI: HJJE4BDRSB2UZB44II16
- Net assets: $788.1M
- Total assets: $809.8M
- As of: 2026-03-31

## Advisers

- [MASSACHUSETTS FINANCIAL SERVICES COMPANY (Advisor)](https://search.stillhousedata.com/firm/110045)

## Top holdings (200 reported)

_Showing 15 of 200 holdings by value._

| Holding | Ticker | Value | % of fund |
| --- | --- | --- | --- |
| [MFS Institutional Money Market Portfolio](https://search.stillhousedata.com/security/55291X109) | — | $33.2M | 420.82% |
| [California Community Choice Financing Authority](https://search.stillhousedata.com/security/13013JEB8) | — | $9.3M | 118.50% |
| [California Community Choice Financing Authority](https://search.stillhousedata.com/security/13013JHG4) | — | $8.0M | 101.97% |
| [Los Angeles Housing Authority](https://search.stillhousedata.com/security/544562DP3) | — | $7.9M | 100.49% |
| [California Municipal Finance Authority](https://search.stillhousedata.com/security/130493DH9) | — | $7.9M | 100.20% |
| [Oakland Unified School District/Alameda County](https://search.stillhousedata.com/security/672325R58) | — | $7.4M | 93.41% |
| [Inglewood Joint Powers Authority](https://search.stillhousedata.com/security/45710PAY6) | — | $6.3M | 80.33% |
| [FNMA](https://search.stillhousedata.com/security/13034DBT0) | — | $5.9M | 74.76% |
| [California Health Facilities Financing Authority](https://search.stillhousedata.com/security/13032US82) | — | $5.8M | 73.27% |
| [California Community Choice Financing Authority](https://search.stillhousedata.com/security/13013JFW1) | — | $5.4M | 68.65% |
| [San Francisco City & County Airport Comm-San Francisco International Airport](https://search.stillhousedata.com/security/79766DVY2) | — | $5.3M | 67.76% |
| [San Francisco Community College District](https://search.stillhousedata.com/security/797683KJ7) | — | $5.3M | 67.37% |
| [City of Oakland CA](https://search.stillhousedata.com/security/672240YN2) | — | $5.3M | 67.21% |
| [California Community Choice Financing Authority](https://search.stillhousedata.com/security/13013JCM6) | — | $5.3M | 67.11% |
| [California Community Choice Financing Authority](https://search.stillhousedata.com/security/13013JBL9) | — | $5.2M | 66.40% |

## Net asset history

| Report date | Net assets |
| --- | --- |
| 2026-03-31 | $788.1M |
| 2025-12-31 | $747.7M |
| 2025-09-30 | $709.1M |
| 2025-06-30 | $688.3M |
| 2025-03-31 | $698.9M |
| 2024-12-31 | $692.6M |
| 2024-09-30 | $670.3M |
| 2024-06-30 | $609.9M |

## More

- [Registrant: MFS Municipal Series Trust](https://search.stillhousedata.com/registrant/751656)
- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/fund/S000002530.md)
- [Search all SEC filings, advisers and people on Adviser Search](https://search.stillhousedata.com/)

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Source: public SEC filing data via Adviser Search (https://search.stillhousedata.com).
Agents: this data is also queryable via MCP tools and read-only SQL — see https://search.stillhousedata.com/llms.txt.