OBIL — US Treasury 12 Month Bill ETF
Data updated: 2026-07-28
OBIL — US Treasury 12 Month Bill ETF data: holdings, portfolio allocation, expenses, performance, cashflows, risk and SEC filings. Short Treasury / Sovereign Bond · $317.77M AUM · 0.15% expense ratio · 3.8% 1-yr return. From SEC regulatory filings.
OBIL Fund Overview
OBIL — US Treasury 12 Month Bill ETF is a US ETF managed by Rbb Fund, Inc., categorised as Short Treasury / Sovereign Bond. ABC INVEST provides holdings, performance, costs, cashflows, risk data, prospectus documents and SEC filings, sourced from SEC filings.
- Type: US ETF
- Manager: Rbb Fund, Inc.
- Category: Short Treasury / Sovereign Bond
- Assets under management: $317.77M
- 1-year return: 3.8%
- Ticker: OBIL
- SEC CIK: 0000831114
- SEC series ID: S000077173
- Share class ID: C000237343
OBIL Holdings
Top 2 holdings of US Treasury 12 Month Bill ETF by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| Treasury Bill | 100.01% |
| U.S. Bank Money Market Deposit Account | 0.00% |
OBIL Portfolio Allocation
Asset-class allocation of US Treasury 12 Month Bill ETF by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Fixed Income | 100.0% |
OBIL Performance
Total returns for OBIL (as of 2026-08-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | 1.2% |
| 1 year | 3.8% |
| 3 years (annualised) | 4.6% |
OBIL Risk Information
Risk metrics for OBIL, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 0.4%
OBIL Costs and Fees
OBIL costs about $15 per $10,000 invested per year in fund expenses.
- Net expense ratio: 0.15%
- Gross expense ratio: 0.15%
- Portfolio turnover: 0%
- Brokerage commissions: 0.00 bps of average net assets (SEC N-CEN)
OBIL Cashflows
Over the 12 months to 2026-02, US Treasury 12 Month Bill ETF had net inflows of $26.07M, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-02 | $5.02M |
| 2026-01 | $3.52M |
| 2025-12 | −$6.03M |
| 2025-11 | $7.53M |
| 2025-10 | $6.53M |
| 2025-09 | $9.54M |
OBIL Debt Constituents
Largest debt holdings of US Treasury 12 Month Bill ETF by percentage of net assets, from the latest SEC N-PORT filing.
| Debt holding | % of net assets |
|---|---|
| Treasury Bill | 100.01% |
OBIL Prospectus and SEC Filings
Official US Treasury 12 Month Bill ETF filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
Related Funds
Other Short Treasury / Sovereign 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.