POSKX Performance — PRIMECAP Odyssey Stock Fund
Data updated: 2026-09-29
POSKX returned +19.80% year to date and +39.78% over one year to Jul 2026. Annualised returns are +21.38% over 3 years and +13.94% over 5 years. The fund beat its US Large Blend category average: $100 invested three years ago grew to $179, against $153 for the category, and to $140 over one year, against $116. Volatility over the past three years was 15.56% a year. In the 12 months to Jul 2026 the fund lost a net $169.5M, and assets reached $4.60B.
POSKX Growth of $100
What $100 invested in PRIMECAP Odyssey Stock Fund grew to, compounded from monthly returns reported on SEC Form N-PORT, against the US Large Blend category average over the same months.
| Period | POSKX | Category average |
|---|---|---|
| 1 year (Aug 2025 – Jul 2026) | $140 | $116 |
| 3 years (Aug 2023 – Jul 2026) | $179 | $153 |
| 5 years (Aug 2021 – Jul 2026) | $192 | $159 |
| Since data start (Aug 2019 – Jul 2026) | $275 | $226 |
POSKX Trailing Returns
Total returns to Jul 2026, from SEC N-PORT.
| Period | Total return |
|---|---|
| YTD | +19.80% |
| 1 year | +39.78% |
| 3 years (annualised) | +21.38% |
| 5 years (annualised) | +13.94% |
POSKX Annual Returns
Calendar-year total returns of PRIMECAP Odyssey Stock Fund, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2026 (Jan–Jul) | +19.80% |
| 2025 | +25.61% |
| 2024 | +12.82% |
| 2023 | +21.24% |
| 2022 | −10.87% |
| 2021 | +25.10% |
| 2020 | +9.97% |
| 2019 (Aug–Dec) | +9.06% |
POSKX 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 | +4.9% | +2.7% | −6.0% | +11.5% | +8.2% | +5.3% | −7.0% | — | — | — | — | — |
| 2025 | +4.5% | −0.5% | −6.3% | −1.7% | +5.6% | +5.8% | +0.6% | +4.9% | +3.1% | +4.3% | +2.9% | +0.6% |
| 2024 | 0.0% | +5.3% | +4.3% | −4.2% | +4.5% | +1.9% | −0.4% | +2.6% | −0.2% | −1.4% | +4.3% | −4.0% |
| 2023 | +5.9% | −3.7% | +1.7% | +0.7% | 0.0% | +7.3% | +2.7% | −0.7% | −3.7% | −4.4% | +8.9% | +5.9% |
| 2022 | −4.2% | −1.5% | +2.1% | −6.3% | +2.7% | −9.5% | +6.7% | −4.5% | −8.1% | +10.3% | +8.2% | −4.9% |
| 2021 | +1.7% | +6.6% | +4.3% | +2.7% | +2.3% | +0.5% | +0.1% | +2.4% | −4.1% | +4.2% | −2.3% | +4.7% |
| 2020 | −3.1% | −9.5% | −15.2% | +9.6% | +3.7% | +2.6% | +3.7% | +5.8% | −1.5% | −1.3% | +13.9% | +4.4% |
| 2019 | — | — | — | — | — | — | — | −3.8% | +3.0% | +3.3% | +3.7% | +2.7% |
POSKX Risk
Risk measures from monthly returns over Aug 2023 – Jul 2026.
- 3-year volatility (annualised): 15.56%
- 3-year Sharpe ratio: 1.08 (vs 4.5% risk-free rate)
- Best month: +11.52% (Apr 2026)
- Worst month: −6.95% (Jul 2026)
POSKX Fund Flows
Monthly money in and out of PRIMECAP Odyssey Stock Fund, from SEC Form N-PORT.
- 12-month net flow: −$169.5M
- 12-month gross sales (incl. reinvestments): $1.5B
- Sales ÷ redemptions: 0.90×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| Jul 2026 | $71.3M | $80.4M | −$9.1M |
| Jun 2026 | $51.7M | $99.4M | −$47.7M |
| May 2026 | $78.8M | $129.5M | −$50.7M |
| Apr 2026 | $55.3M | $91.6M | −$36.3M |
| Mar 2026 | $30.0M | $76.9M | −$46.9M |
| Feb 2026 | $16.0M | $75.2M | −$59.2M |
| Jan 2026 | $22.6M | $77.9M | −$55.3M |
| Dec 2025 | $1.1B | $680.1M | $439.5M |
| Nov 2025 | $15.1M | $75.1M | −$60.0M |
| Oct 2025 | $14.8M | $106.5M | −$91.7M |
| Sep 2025 | $11.5M | $69.6M | −$58.1M |
| Aug 2025 | $13.4M | $107.4M | −$94.1M |
POSKX Assets Under Management
Net assets of PRIMECAP Odyssey Stock Fund by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-07-31 | $4.60B |
| 2026-04-30 | $4.44B |
| 2026-01-31 | $4.27B |
| 2025-10-31 | $4.52B |
| 2025-07-31 | $4.24B |
| 2025-04-30 | $4.23B |
| 2025-01-31 | $5.01B |
| 2024-10-31 | $5.23B |
| 2024-07-31 | $5.57B |
| 2024-04-30 | $5.57B |
| 2024-01-31 | $5.64B |
| 2023-10-31 | $5.24B |
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.