OSTIX — Osterweis Strategic Income Fund
Data updated: 2026-08-21
OSTIX — Osterweis Strategic Income Fund. Short Corporate Bond · $5.76B AUM · 0.86% expense ratio. Holdings, fees, performance and SEC filings.
OSTIX Fund Overview
OSTIX — Osterweis Strategic Income Fund is a US mutual fund managed by Professionally Managed Portfolios, categorised as Short Corporate Bond. ABC INVEST provides holdings, performance, costs, cashflows, risk data, prospectus documents and SEC filings, sourced from SEC filings.
- Type: US mutual fund
- Manager: Professionally Managed Portfolios
- Category: Short Corporate Bond
- Assets under management: $5.76B
- 1-year return: 4.5%
- Ticker: OSTIX
- SEC CIK: 0000811030
- SEC series ID: S000004930
- Share class ID: C000013345
OSTIX Holdings
Top 10 holdings of Osterweis Strategic Income Fund by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| MSILF Treasury Securities Port | 3.37% |
| Federated Hermes US Treasury C | 3.37% |
| First American US Treasury Mon | 3.17% |
| Unisys Corp. | 1.39% |
| Conduent Bus Services | 1.24% |
| Kehe Dist/fin / Nextwave | 1.14% |
| Coeur Mining, Inc. | 1.14% |
| Pitney Bowes, Inc. | 1.14% |
| Banijay Entertainment | 1.07% |
| Marriott Vacation Worldw | 1.07% |
OSTIX Portfolio Allocation
Asset-class allocation of Osterweis Strategic Income Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Fixed Income | 72.0% |
| Cash & Equivalents | 27.0% |
| Equity | 0.7% |
OSTIX Performance
Total returns for OSTIX (as of 2026-09-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | 2.3% |
| 1 year | 4.5% |
| 3 years (annualised) | 7.6% |
| 5 years (annualised) | 4.6% |
OSTIX Risk Information
Risk metrics for OSTIX, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 1.7%
OSTIX Costs and Fees
OSTIX costs about $86 per $10,000 invested per year in fund expenses.
- Net expense ratio: 0.86%
- Gross expense ratio: 0.86%
- Portfolio turnover: 37%
- Brokerage commissions: 0.00 bps of average net assets (SEC N-CEN)
OSTIX Cashflows
Over the 12 months to 2026-06, Osterweis Strategic Income Fund had net inflows of $28.24M, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-06 | $33.61M |
| 2026-05 | $2.86M |
| 2026-04 | −$60.39M |
| 2026-03 | −$34.98M |
| 2026-02 | $8.90M |
| 2026-01 | −$8.48M |
OSTIX Debt Constituents
Largest debt holdings of Osterweis Strategic Income Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Debt holding | % of net assets |
|---|---|
| Unisys Corp. | 1.39% |
| Conduent Bus Services | 1.24% |
| Kehe Dist/fin / Nextwave | 1.14% |
| Coeur Mining, Inc. | 1.14% |
| Pitney Bowes, Inc. | 1.14% |
| Banijay Entertainment | 1.07% |
| Marriott Vacation Worldw | 1.07% |
| Griffon Corporation | 1.05% |
| Upbound Group, Inc. | 1.04% |
| William Carter | 1.04% |
OSTIX Prospectus and SEC Filings
Official Osterweis Strategic Income Fund filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
- Prospectus (485BPOS) — filed 2026-06-30
- Prospectus (485BPOS) — filed 2025-06-27
- Prospectus (485BPOS) — filed 2024-06-28
- Portfolio holdings (N-PORT) — filed 2026-08-21
- Portfolio holdings (N-PORT) — filed 2026-05-28
- Portfolio holdings (N-PORT) — filed 2026-02-18
- Annual census (N-CEN) — filed 2026-06-11
- Annual census (N-CEN) — filed 2025-06-10
Related Funds
Other Short Corporate 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.