BASBX — Brown Advisory Sustainable Bond Fund
Data updated: 2026-05-27
BASBX — Brown Advisory Sustainable Bond Fund data: holdings, portfolio allocation, expenses, performance, cashflows, risk and SEC filings. Long Total / Aggregate Bond · $542.51M AUM · 0.47% expense ratio · 4.0% 1-yr return. From SEC regulatory filings.
BASBX Fund Overview
BASBX — Brown Advisory Sustainable Bond Fund is a US mutual fund managed by Brown Advisory Funds, categorised as Long Total / Aggregate Bond. ABC INVEST provides holdings, performance, costs, cashflows, risk data, prospectus documents and SEC filings, sourced from SEC filings.
- Type: US mutual fund
- Manager: Brown Advisory Funds
- Category: Long Total / Aggregate Bond
- Assets under management: $542.51M
- 1-year return: 4.0%
- Ticker: BASBX
- SEC CIK: 0001548609
- SEC series ID: S000058305
- Share class ID: C000191096
BASBX Holdings
Top 10 holdings of Brown Advisory Sustainable Bond Fund by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| Strips | 4.20% |
| US Treasury N/b | 3.64% |
| European Investment Bank | 3.54% |
| Fannie Mae or Freddie Mac | 3.40% |
| US Treasury N/b | 3.26% |
| First American Government Obli | 2.84% |
| US Treasury N/b | 2.76% |
| US Treasury N/b | 2.45% |
| US Treasury N/b | 2.40% |
| Fannie Mae or Freddie Mac | 2.09% |
BASBX Portfolio Allocation
Asset-class allocation of Brown Advisory Sustainable Bond Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Fixed Income | 61.3% |
| Securitized | 42.4% |
| Cash & Equivalents | 2.8% |
BASBX Performance
Total returns for BASBX (as of 2026-08-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | -0.0% |
| 1 year | 4.0% |
| 3 years (annualised) | 2.8% |
| 5 years (annualised) | -0.3% |
BASBX Risk Information
Risk metrics for BASBX, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 3.5%
BASBX Costs and Fees
BASBX costs about $47 per $10,000 invested per year in fund expenses.
- Net expense ratio: 0.47%
- Gross expense ratio: 0.47%
- Portfolio turnover: 104%
- Brokerage commissions: 0.42 bps of average net assets (SEC N-CEN)
BASBX Cashflows
Over the 12 months to 2026-03, Brown Advisory Sustainable Bond Fund had net outflows of $31.22M, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-03 | −$6.43M |
| 2026-02 | −$9.44M |
| 2026-01 | −$11.71M |
| 2025-12 | $4.35M |
| 2025-11 | −$1.74M |
| 2025-10 | −$6.48M |
BASBX Debt Constituents
Largest debt holdings of Brown Advisory Sustainable Bond Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Debt holding | % of net assets |
|---|---|
| Strips | 4.20% |
| US Treasury N/b | 3.64% |
| European Investment Bank | 3.54% |
| US Treasury N/b | 3.26% |
| US Treasury N/b | 2.76% |
| US Treasury N/b | 2.45% |
| US Treasury N/b | 2.40% |
| Revvity, Inc. | 1.52% |
| Societe Generale | 1.05% |
| European Investment Bank | 1.05% |
BASBX Prospectus and SEC Filings
Official Brown Advisory Sustainable Bond Fund filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
Related Funds
Other Long Total / Aggregate 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.