BIAZX — Brown Advisory Mortgage Securities Fund
Data updated: 2026-09-11
BIAZX — Brown Advisory Mortgage Securities Fund. Long Securitized (MBS/ABS/CMBS) Bond · $267.68M AUM. Holdings, fees, performance and SEC filings.
BIAZX Fund Overview
BIAZX — Brown Advisory Mortgage Securities Fund is a US mutual fund managed by Brown Advisory Funds, categorised as Long Securitized (MBS/ABS/CMBS) 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 Securitized (MBS/ABS/CMBS) Bond
- Assets under management: $267.68M
- 1-year return: 4.8%
- Ticker: BIAZX
- SEC CIK: 0001548609
- SEC series ID: S000043634
- Share class ID: C000135280
BIAZX Holdings
Top 10 holdings of Brown Advisory Mortgage Securities Fund by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| First American Government Obli | 8.80% |
| Fannie Mae or Freddie Mac | 7.76% |
| Fannie Mae or Freddie Mac | 3.86% |
| Fannie Mae or Freddie Mac | 2.94% |
| Fannie Mae or Freddie Mac | 2.86% |
| Fannie Mae or Freddie Mac | 2.51% |
| FHLMC Multifamily Structured P | 1.99% |
| Fannie Mae or Freddie Mac | 1.56% |
| Fannie Mae or Freddie Mac | 1.50% |
| Freddie Mac | 1.40% |
BIAZX Portfolio Allocation
Asset-class allocation of Brown Advisory Mortgage Securities Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Securitized | 117.2% |
| Cash & Equivalents | 8.8% |
| Fixed Income | 0.9% |
BIAZX Performance
Total returns for BIAZX (as of 2026-09-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | 0.8% |
| 1 year | 4.8% |
| 3 years (annualised) | 4.2% |
| 5 years (annualised) | 0.4% |
BIAZX Risk Information
Risk metrics for BIAZX, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 3.3%
BIAZX Costs and Fees
BIAZX costs about $51 per $10,000 invested per year in fund expenses.
- Net expense ratio: 0.51%
- Gross expense ratio: 0.51%
- Portfolio turnover: 221%
- Brokerage commissions: 0.28 bps of average net assets (SEC N-CEN)
BIAZX Cashflows
Over the 12 months to 2026-06, Brown Advisory Mortgage Securities Fund had net outflows of $22.36M, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-06 | $1.17M |
| 2026-05 | −$3.22M |
| 2026-04 | −$4.45M |
| 2026-03 | −$2.84M |
| 2026-02 | $2.36M |
| 2026-01 | $10.89M |
BIAZX Debt Constituents
Largest debt holdings of Brown Advisory Mortgage Securities Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Debt holding | % of net assets |
|---|---|
| Fannie Mae or Freddie Mac | 0.81% |
| Colorado St Hlth Facs Auth Rev | 0.09% |
BIAZX Prospectus and SEC Filings
Official Brown Advisory Mortgage Securities 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 Securitized (MBS/ABS/CMBS) 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.