JAMFX Performance — Jacob Internet Fund, Investor Class
Data updated: 2026-10-14
JAMFX returned −11.33% year to date and −21.28% over one year to Aug 2026. Annualised returns are +11.29% over 3 years and −10.51% over 5 years. The fund trailed its Technology Equity category average: $100 invested three years ago grew to $138, against $225 for the category, and to $79 over one year, against $143. Volatility over the past three years was 31.00% a year. In the 12 months to May 2026 the fund lost a net $5.9M, and assets reached $42.63M.
JAMFX Growth of $100
What $100 invested in Jacob Internet Fund grew to, compounded from monthly returns reported on SEC Form N-PORT, against the Technology Equity category average over the same months.
| Period | JAMFX | Category average |
|---|---|---|
| 1 year (Sep 2025 – Aug 2026) | $79 | $143 |
| 3 years (Sep 2023 – Aug 2026) | $138 | $225 |
| 5 years (Sep 2021 – Aug 2026) | $57 | $197 |
| Since data start (Mar 2020 – Aug 2026) | $153 | $358 |
JAMFX Trailing Returns
Total returns to Aug 2026, from SEC N-PORT.
| Period | Total return |
|---|---|
| YTD | −11.33% |
| 1 year | −21.28% |
| 3 years (annualised) | +11.29% |
| 5 years (annualised) | −10.51% |
JAMFX Annual Returns
Calendar-year total returns of Jacob Internet Fund, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2026 (Jan–Aug) | −11.33% |
| 2025 | +13.11% |
| 2024 | +14.31% |
| 2023 | +34.63% |
| 2022 | −59.54% |
| 2021 | +12.81% |
| 2020 (Mar–Dec) | +116.90% |
JAMFX 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 | −10.4% | −13.3% | −5.3% | +8.8% | +10.9% | −4.3% | −5.6% | +10.7% | — | — | — | — |
| 2025 | +6.1% | −0.3% | −12.2% | −1.3% | +8.5% | +10.5% | +4.2% | +11.2% | +0.9% | −1.3% | −10.1% | −0.8% |
| 2024 | −6.0% | +8.2% | +1.5% | −10.1% | −2.9% | −1.5% | +4.8% | −2.7% | +3.0% | +2.7% | +20.8% | −1.2% |
| 2023 | +16.4% | −4.0% | −1.2% | −6.8% | +9.9% | +5.8% | +4.8% | −10.6% | −8.6% | −7.4% | +18.1% | +20.2% |
| 2022 | −20.1% | +1.7% | −4.9% | −19.7% | −11.2% | −16.8% | +15.9% | −4.0% | −14.7% | +1.0% | +1.7% | −9.4% |
| 2021 | +8.8% | +21.0% | −1.9% | −3.9% | −4.3% | +7.2% | −7.4% | +4.1% | −1.6% | +11.4% | −12.3% | −4.4% |
| 2020 | — | — | −23.4% | +20.9% | +17.1% | +11.6% | +10.7% | +16.0% | +1.1% | −2.1% | +21.8% | +15.7% |
JAMFX Risk
Risk measures from monthly returns over Sep 2023 – Aug 2026.
- 3-year volatility (annualised): 31.00%
- 3-year Sharpe ratio: 0.22 (vs 4.5% risk-free rate)
- Best month: +20.81% (Nov 2024)
- Worst month: −13.33% (Feb 2026)
JAMFX Fund Flows
Monthly money in and out of Jacob Internet Fund, from SEC Form N-PORT.
- 12-month net flow: −$5.9M
- 12-month gross sales (incl. reinvestments): $6.4M
- Sales ÷ redemptions: 0.52×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| May 2026 | $163K | $1.4M | −$1.2M |
| Apr 2026 | $1.2M | $1.1M | $106K |
| Mar 2026 | $554K | $710K | −$156K |
| Feb 2026 | $177K | $705K | −$528K |
| Jan 2026 | $79K | $925K | −$846K |
| Dec 2025 | $1.3M | $838K | $467K |
| Nov 2025 | $155K | $723K | −$568K |
| Oct 2025 | $266K | $2.5M | −$2.3M |
| Sep 2025 | $734K | $1.5M | −$798K |
| Aug 2025 | $724K | $396K | $328K |
| Jul 2025 | $621K | $707K | −$86K |
| Jun 2025 | $433K | $780K | −$346K |
JAMFX Assets Under Management
Net assets of Jacob Internet Fund by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-08-31 | $42.63M |
| 2026-05-31 | $44.44M |
| 2026-02-28 | $40.09M |
| 2025-11-30 | $54.31M |
| 2025-08-31 | $64.40M |
| 2025-05-31 | $50.45M |
| 2025-02-28 | $59.81M |
| 2024-11-30 | $54.92M |
| 2024-08-31 | $44.56M |
| 2024-05-31 | $47.01M |
| 2024-02-29 | $55.45M |
| 2023-11-30 | $47.47M |
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.