OSTIX Performance — Osterweis Strategic Income Fund, Investor Class
Data updated: 2026-08-21
OSTIX returned +2.27% year to date and +4.47% over one year to Jun 2026. Annualised returns are +7.57% over 3 years and +4.55% over 5 years. Against its Short-Term Corporate Bond category average the fund came out ahead over three years but behind over one: $100 invested three years ago grew to $124, against $121 for the category, and to $104 over one year, against $105. Volatility over the past three years was 2.74% a year. In the 12 months to Jun 2026 the fund took in a net $28.2M, and assets reached $5.76B.
OSTIX Growth of $100
What $100 invested in Osterweis Strategic Income Fund grew to, compounded from monthly returns reported on SEC Form N-PORT, against the Short-Term Corporate Bond category average over the same months.
| Period | OSTIX | Category average |
|---|---|---|
| 1 year (Jul 2025 – Jun 2026) | $104 | $105 |
| 3 years (Jul 2023 – Jun 2026) | $124 | $121 |
| 5 years (Jul 2021 – Jun 2026) | $125 | $117 |
| Since data start (Jul 2019 – Jun 2026) | $142 | $128 |
OSTIX Trailing Returns
Total returns to Jun 2026, from SEC N-PORT.
| Period | Total return |
|---|---|
| YTD | +2.27% |
| 1 year | +4.47% |
| 3 years (annualised) | +7.57% |
| 5 years (annualised) | +4.55% |
OSTIX Annual Returns
Calendar-year total returns of Osterweis Strategic Income Fund, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2026 (Jan–Jun) | +2.27% |
| 2025 | +5.45% |
| 2024 | +8.03% |
| 2023 | +12.29% |
| 2022 | −5.92% |
| 2021 | +5.47% |
| 2020 | +9.03% |
| 2019 (Jul–Dec) | +0.22% |
OSTIX Monthly Returns
Monthly total returns as reported on SEC Form N-PORT.
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | +0.4% | 0.0% | −0.5% | +1.2% | +1.0% | +0.1% | — | — | — | — | — | — |
| 2025 | +0.8% | +0.4% | −0.5% | 0.0% | +1.3% | +1.3% | +0.1% | +0.9% | +0.4% | −0.1% | +0.3% | +0.5% |
| 2024 | +0.7% | +0.5% | +1.1% | −0.2% | +0.8% | +0.6% | +0.9% | +1.1% | +0.9% | 0.0% | +1.0% | +0.3% |
| 2023 | +2.9% | −0.8% | +0.4% | +1.1% | 0.0% | +1.5% | +1.5% | +0.7% | −0.5% | −0.7% | +2.8% | +3.0% |
| 2022 | −1.3% | −0.5% | −0.3% | −1.9% | −0.8% | −4.8% | +3.4% | −0.7% | −3.0% | +2.0% | +1.9% | +0.1% |
| 2021 | −0.2% | +0.8% | +0.5% | +0.9% | +0.4% | +1.5% | +0.4% | +0.5% | −0.1% | +0.2% | −0.7% | +1.2% |
| 2020 | +0.5% | −0.8% | −6.8% | +1.5% | +2.8% | +2.9% | +2.4% | +1.8% | 0.0% | +0.9% | +2.6% | +1.4% |
| 2019 | — | — | — | — | — | — | +0.2% | −0.2% | −0.3% | −0.2% | −0.3% | +1.0% |
OSTIX Risk
Risk measures from monthly returns over Jul 2023 – Jun 2026.
- 3-year volatility (annualised): 2.74%
- 3-year Sharpe ratio: 1.12 (vs 4.5% risk-free rate)
- Best month: +2.99% (Dec 2023)
- Worst month: −0.66% (Oct 2023)
OSTIX Fund Flows
Monthly money in and out of Osterweis Strategic Income Fund, from SEC Form N-PORT.
- 12-month net flow: $28.2M
- 12-month gross sales (incl. reinvestments): $1.4B
- Sales ÷ redemptions: 1.02×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| Jun 2026 | $106.5M | $72.9M | $33.6M |
| May 2026 | $97.4M | $94.6M | $2.9M |
| Apr 2026 | $100.1M | $160.5M | −$60.4M |
| Mar 2026 | $129.0M | $164.0M | −$35.0M |
| Feb 2026 | $125.6M | $116.7M | $8.9M |
| Jan 2026 | $131.5M | $140.0M | −$8.5M |
| Dec 2025 | $125.9M | $147.2M | −$21.3M |
| Nov 2025 | $120.7M | $93.3M | $27.4M |
| Oct 2025 | $133.0M | $120.4M | $12.6M |
| Sep 2025 | $101.7M | $70.4M | $31.2M |
| Aug 2025 | $104.3M | $104.5M | −$210K |
| Jul 2025 | $117.9M | $80.9M | $37.0M |
OSTIX Assets Under Management
Net assets of Osterweis Strategic Income Fund by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-06-30 | $5.76B |
| 2026-03-31 | $5.72B |
| 2025-12-31 | $5.84B |
| 2025-09-30 | $5.86B |
| 2025-06-30 | $5.78B |
| 2025-03-31 | $6.04B |
| 2024-12-31 | $5.92B |
| 2024-09-30 | $5.73B |
| 2024-06-30 | $5.47B |
| 2024-03-31 | $5.35B |
| 2023-12-31 | $5.05B |
| 2023-09-30 | $4.72B |
For information only. Not investment advice: figures are as reported in SEC filings and may contain errors or be out of date. Past performance does not guarantee future results.