BAISX — Brown Advisory Sustainable Bond Fund
Data updated: 2026-09-11
BAISX — Brown Advisory Sustainable Bond Fund. Long Total / Aggregate Bond · $536.66M AUM · 0.42% expense ratio. Holdings, fees, performance and SEC filings.
BAISX Fund Overview
BAISX — 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: $536.66M
- 1-year return: 3.6%
- Ticker: BAISX
- SEC CIK: 0001548609
- SEC series ID: S000058305
- Share class ID: C000191095
BAISX 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 | 4.30% |
| US Treasury N/b | 3.66% |
| US Treasury N/b | 3.28% |
| US Treasury N/b | 2.78% |
| Asian Development Bank | 2.74% |
| US Treasury N/b | 2.47% |
| Treasury Bill | 2.23% |
| First American Government Obli | 2.16% |
| Fannie Mae or Freddie Mac | 1.62% |
| Fannie Mae or Freddie Mac | 1.59% |
BAISX 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 | 63.1% |
| Securitized | 43.0% |
| Cash & Equivalents | 2.2% |
BAISX Performance
Total returns for BAISX (as of 2026-09-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | 0.6% |
| 1 year | 3.6% |
| 3 years (annualised) | 3.7% |
| 5 years (annualised) | -0.5% |
BAISX Risk Information
Risk metrics for BAISX, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 3.1%
BAISX Costs and Fees
BAISX costs about $42 per $10,000 invested per year in fund expenses.
- Net expense ratio: 0.42%
- Gross expense ratio: 0.42%
- Portfolio turnover: 104%
- Brokerage commissions: 0.30 bps of average net assets (SEC N-CEN)
BAISX Cashflows
Over the 12 months to 2026-06, Brown Advisory Sustainable Bond Fund had net outflows of $37.26M, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-06 | $3.00M |
| 2026-05 | −$10.00M |
| 2026-04 | $2.89M |
| 2026-03 | −$6.43M |
| 2026-02 | −$9.44M |
| 2026-01 | −$11.71M |
BAISX 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 | 4.30% |
| US Treasury N/b | 3.66% |
| US Treasury N/b | 3.28% |
| US Treasury N/b | 2.78% |
| Asian Development Bank | 2.74% |
| US Treasury N/b | 2.47% |
| Treasury Bill | 2.23% |
| Revvity, Inc. | 1.55% |
| European Investment Bank | 1.07% |
| Societe Generale | 1.06% |
BAISX Prospectus and SEC Filings
Official Brown Advisory Sustainable Bond Fund filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
- Prospectus (485BPOS) — filed 2025-10-29
- Prospectus (485BPOS) — filed 2024-10-29
- Prospectus (485BPOS) — filed 2022-10-28
- Portfolio holdings (N-PORT) — filed 2026-08-25
- Portfolio holdings (N-PORT) — filed 2026-05-27
- Portfolio holdings (N-PORT) — filed 2026-02-26
- Annual census (N-CEN) — filed 2026-09-11
- Annual census (N-CEN) — filed 2024-09-10
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.