BBMUX — Bridge Builder Municipal Bond Fund
Data updated: 2026-05-22
BBMUX — Bridge Builder Municipal Bond Fund data: holdings, portfolio allocation, expenses, performance, cashflows, risk and SEC filings. Long Municipal - National Bond · $20.14B AUM · 0.12% expense ratio · 4.8% 1-yr return. From SEC regulatory filings.
BBMUX Fund Overview
BBMUX — Bridge Builder Municipal Bond Fund is a US mutual fund managed by Bridge Builder Trust, categorised as Long Municipal - National Bond. ABC INVEST provides holdings, performance, costs, cashflows, risk data, prospectus documents and SEC filings, sourced from SEC filings.
- Type: US mutual fund
- Manager: Bridge Builder Trust
- Category: Long Municipal - National Bond
- Assets under management: $20.14B
- 1-year return: 4.8%
- Ticker: BBMUX
- SEC CIK: 0001567101
- SEC series ID: S000050632
- Share class ID: C000159840
BBMUX Holdings
Top 10 holdings of Bridge Builder Municipal Bond Fund by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| Fidelity Inv Mmkt Govt-Inst | 2.71% |
| Southeast Energy A 5% 10/01/30 | 0.62% |
| Kentucky St Publi V/r 01/01/55 | 0.39% |
| California Cmnty V/r 01/01/55 | 0.30% |
| Puerto Rico SA 4.329% 07/01/40 | 0.28% |
| Miami-Dade Cnty Fl 5% 10/01/32 | 0.27% |
| Chicago Il Brd Of 6% 04/01/46 | 0.27% |
| Tennessee St Energ 5% 12/01/35 | 0.25% |
| Harris Cnty Tx Cu V/r 12/01/60 | 0.24% |
| Southeast Energy V/r 10/01/55 | 0.23% |
BBMUX Portfolio Allocation
Asset-class allocation of Bridge Builder Municipal Bond Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Fixed Income | 95.4% |
| Equity | 2.7% |
| Securitized | 1.3% |
| Cash & Equivalents | 0.1% |
BBMUX Performance
Total returns for BBMUX (as of 2026-08-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | -0.1% |
| 1 year | 4.8% |
| 3 years (annualised) | 3.6% |
| 5 years (annualised) | 1.4% |
BBMUX Risk Information
Risk metrics for BBMUX, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 3.6%
BBMUX Costs and Fees
BBMUX costs about $12 per $10,000 invested per year in fund expenses.
- Net expense ratio: 0.12%
- Gross expense ratio: 0.38%
- Portfolio turnover: 37%
- Brokerage commissions: 0.00 bps of average net assets (SEC N-CEN)
BBMUX Cashflows
Over the 12 months to 2026-03, Bridge Builder Municipal Bond Fund had net inflows of $3.33B, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-03 | $292.97M |
| 2026-02 | $378.72M |
| 2026-01 | $379.66M |
| 2025-12 | $364.47M |
| 2025-11 | $228.03M |
| 2025-10 | $141.33M |
BBMUX Debt Constituents
Largest debt holdings of Bridge Builder Municipal Bond Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Debt holding | % of net assets |
|---|---|
| Southeast Energy A 5% 10/01/30 | 0.62% |
| Kentucky St Publi V/r 01/01/55 | 0.39% |
| California Cmnty V/r 01/01/55 | 0.30% |
| Puerto Rico SA 4.329% 07/01/40 | 0.28% |
| Miami-Dade Cnty Fl 5% 10/01/32 | 0.27% |
| Chicago Il Brd Of 6% 04/01/46 | 0.27% |
| Tennessee St Energ 5% 12/01/35 | 0.25% |
| Harris Cnty Tx Cu V/r 12/01/60 | 0.24% |
| Southeast Energy V/r 10/01/55 | 0.23% |
| Tarrant Cnty Tx C V/r 11/15/51 | 0.22% |
BBMUX Prospectus and SEC Filings
Official Bridge Builder Municipal Bond Fund filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
Related Funds
Other Long Municipal - National Bond funds tracked on ABC INVEST:
Data Sources
ABC INVEST compiles this page from public filings made to the U.S. Securities and Exchange Commission (SEC) through EDGAR: portfolio holdings and monthly cashflows from Form N-PORT, expenses and returns from fund prospectuses (Form 485BPOS) and the SEC DERA Risk/Return Summary data sets, annual data from Form N-CEN, and shareholder reports from Form N-CSR.