BUISX Performance — Buffalo Small Cap Growth Fund, Institutional Class
Data updated: 2026-08-21
BUISX returned +20.90% year to date and +23.62% over one year to Jun 2026. Annualised returns are +7.41% over 3 years and −3.03% over 5 years. The fund trailed its US Small Growth category average: $100 invested three years ago grew to $124, against $156 for the category, and to $124 over one year, against $132. Volatility over the past three years was 19.82% a year. In the 12 months to Jun 2026 the fund lost a net $141.4M, and assets reached $466.68M.
BUISX Growth of $100
What $100 invested in Buffalo Small Cap Growth Fund grew to, compounded from monthly returns reported on SEC Form N-PORT, against the US Small Growth category average over the same months.
| Period | BUISX | Category average |
|---|---|---|
| 1 year (Jul 2025 – Jun 2026) | $124 | $132 |
| 3 years (Jul 2023 – Jun 2026) | $124 | $156 |
| 5 years (Jul 2021 – Jun 2026) | $86 | $127 |
| Since data start (Jul 2019 – Jun 2026) | $179 | $203 |
BUISX Trailing Returns
Total returns to Jun 2026, from SEC N-PORT.
| Period | Total return |
|---|---|
| YTD | +20.90% |
| 1 year | +23.62% |
| 3 years (annualised) | +7.41% |
| 5 years (annualised) | −3.03% |
BUISX Annual Returns
Calendar-year total returns of Buffalo Small Cap Growth Fund, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2026 (Jan–Jun) | +20.90% |
| 2025 | −0.07% |
| 2024 | +5.40% |
| 2023 | +5.55% |
| 2022 | −29.89% |
| 2021 | +4.97% |
| 2020 | +66.63% |
| 2019 (Jul–Dec) | +8.32% |
BUISX 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 | +4.1% | +0.3% | −8.2% | +11.8% | +4.5% | +7.9% | — | — | — | — | — | — |
| 2025 | +4.3% | −7.6% | −6.5% | −1.9% | +4.8% | +5.5% | −0.3% | +3.3% | −0.9% | +0.4% | +1.5% | −1.6% |
| 2024 | −2.0% | +5.5% | +0.9% | −6.8% | +2.9% | −0.7% | +7.1% | −0.1% | +0.9% | −4.3% | +10.1% | −6.8% |
| 2023 | +10.0% | −1.9% | −1.9% | −4.2% | −0.9% | +8.0% | +2.3% | −4.0% | −8.0% | −9.8% | +8.9% | +9.7% |
| 2022 | −16.0% | +0.7% | −0.3% | −12.8% | −0.7% | −6.6% | +13.1% | +0.3% | −8.6% | +8.3% | −1.2% | −7.1% |
| 2021 | +5.8% | +6.1% | −5.3% | +5.9% | −3.1% | +5.8% | −3.3% | +0.6% | −3.3% | +5.1% | −9.0% | +1.1% |
| 2020 | +1.1% | −6.3% | −15.4% | +19.2% | +14.1% | +5.9% | +5.7% | +4.0% | 0.0% | +1.7% | +12.9% | +14.4% |
| 2019 | — | — | — | — | — | — | +0.7% | −2.7% | −2.1% | +3.8% | +6.6% | +2.1% |
BUISX Risk
Risk measures from monthly returns over Jul 2023 – Jun 2026.
- 3-year volatility (annualised): 19.82%
- 3-year Sharpe ratio: 0.15 (vs 4.5% risk-free rate)
- Best month: +11.85% (Apr 2026)
- Worst month: −9.78% (Oct 2023)
BUISX Fund Flows
Monthly money in and out of Buffalo Small Cap Growth Fund, from SEC Form N-PORT.
- 12-month net flow: −$141.4M
- 12-month gross sales (incl. reinvestments): $21.1M
- Sales ÷ redemptions: 0.13×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| Jun 2026 | $1.3M | $8.9M | −$7.7M |
| May 2026 | $1.5M | $9.2M | −$7.6M |
| Apr 2026 | $912K | $7.0M | −$6.1M |
| Mar 2026 | $1.4M | $16.0M | −$14.5M |
| Feb 2026 | $2.3M | $9.8M | −$7.5M |
| Jan 2026 | $2.0M | $24.1M | −$22.1M |
| Dec 2025 | $1.9M | $11.9M | −$9.9M |
| Nov 2025 | $1.9M | $15.8M | −$13.9M |
| Oct 2025 | $947K | $13.8M | −$12.9M |
| Sep 2025 | $1.5M | $14.7M | −$13.2M |
| Aug 2025 | $3.3M | $9.5M | −$6.2M |
| Jul 2025 | $2.2M | $21.7M | −$19.6M |
BUISX Assets Under Management
Net assets of Buffalo Small Cap Growth Fund by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-06-30 | $466.68M |
| 2026-03-31 | $388.72M |
| 2025-12-31 | $448.96M |
| 2025-09-30 | $484.34M |
| 2025-06-30 | $513.67M |
| 2025-03-31 | $506.00M |
| 2024-12-31 | $594.25M |
| 2024-09-30 | $643.15M |
| 2024-06-30 | $628.10M |
| 2024-03-31 | $707.47M |
| 2023-12-31 | $712.76M |
| 2023-09-30 | $720.76M |
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.