ICSCX Performance — William Blair Small Cap Value Fund, Class I
Data updated: 2026-08-14
ICSCX returned +23.32% year to date and +35.07% over one year to Jun 2026. Annualised returns are +12.57% over 3 years and +5.99% over 5 years. Against its US Small Value category average the fund came out behind over three years but ahead over one: $100 invested three years ago grew to $143, against $153 for the category, and to $135 over one year, against $131. Volatility over the past three years was 18.30% a year. In the 12 months to Jun 2026 the fund lost a net $326.6M, and assets reached $1.05B.
ICSCX Growth of $100
What $100 invested in William Blair Small Cap Value Fund grew to, compounded from monthly returns reported on SEC Form N-PORT, against the US Small Value category average over the same months.
| Period | ICSCX | Category average |
|---|---|---|
| 1 year (Jul 2025 – Jun 2026) | $135 | $131 |
| 3 years (Jul 2023 – Jun 2026) | $143 | $153 |
| 5 years (Jul 2021 – Jun 2026) | $134 | $149 |
| Since data start (Jul 2019 – Jun 2026) | $154 | $213 |
ICSCX Trailing Returns
Total returns to Jun 2026, from SEC N-PORT.
| Period | Total return |
|---|---|
| YTD | +23.32% |
| 1 year | +35.07% |
| 3 years (annualised) | +12.57% |
| 5 years (annualised) | +5.99% |
ICSCX Annual Returns
Calendar-year total returns of William Blair Small Cap Value Fund, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2026 (Jan–Jun) | +23.32% |
| 2025 | +2.90% |
| 2024 | +3.46% |
| 2023 | +10.86% |
| 2022 | −11.11% |
| 2021 | +21.86% |
| 2020 | −5.57% |
| 2019 (Jul–Dec) | +3.48% |
ICSCX 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 | +6.7% | +1.8% | −4.1% | +9.4% | +1.7% | +6.5% | — | — | — | — | — | — |
| 2025 | +1.9% | −4.2% | −6.0% | −4.6% | +4.0% | +3.2% | +0.7% | +6.6% | −1.7% | −1.1% | +4.0% | +0.9% |
| 2024 | −3.6% | +2.6% | +4.8% | −6.7% | +3.8% | −2.3% | +10.5% | −2.4% | −0.8% | −3.3% | +10.1% | −7.4% |
| 2023 | +9.4% | −0.5% | −6.6% | −3.2% | −3.5% | +7.4% | +5.7% | −3.1% | −4.5% | −5.9% | +6.2% | +11.2% |
| 2022 | −5.2% | +2.0% | −0.7% | −5.2% | +3.1% | −9.7% | +10.8% | −5.0% | −10.0% | +13.4% | +4.7% | −6.7% |
| 2021 | +1.5% | +8.6% | +4.6% | +3.8% | +0.3% | −1.8% | −2.6% | +1.7% | −2.1% | +2.3% | −1.6% | +6.0% |
| 2020 | −4.4% | −10.2% | −24.2% | +10.0% | +4.9% | −1.9% | +2.2% | +3.7% | −5.2% | +4.1% | +13.4% | +8.1% |
| 2019 | — | — | — | — | — | — | +0.8% | −5.1% | +3.4% | +0.8% | +1.6% | +2.2% |
ICSCX Risk
Risk measures from monthly returns over Jul 2023 – Jun 2026.
- 3-year volatility (annualised): 18.30%
- 3-year Sharpe ratio: 0.44 (vs 4.5% risk-free rate)
- Best month: +11.22% (Dec 2023)
- Worst month: −7.45% (Dec 2024)
ICSCX Fund Flows
Monthly money in and out of William Blair Small Cap Value Fund, from SEC Form N-PORT.
- 12-month net flow: −$326.6M
- 12-month gross sales (incl. reinvestments): $126.6M
- Sales ÷ redemptions: 0.28×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| Jun 2026 | $4.6M | $7.5M | −$2.9M |
| May 2026 | $10.7M | $13.7M | −$3.0M |
| Apr 2026 | $3.0M | $47.4M | −$44.3M |
| Mar 2026 | $5.9M | $12.4M | −$6.6M |
| Feb 2026 | $23.8M | $23.6M | $239K |
| Jan 2026 | $4.9M | $20.7M | −$15.8M |
| Dec 2025 | $26.5M | $20.0M | $6.5M |
| Nov 2025 | $2.8M | $47.8M | −$45.0M |
| Oct 2025 | $4.7M | $131.7M | −$127.1M |
| Sep 2025 | $30.5M | $48.3M | −$17.8M |
| Aug 2025 | $3.8M | $28.4M | −$24.6M |
| Jul 2025 | $5.5M | $51.7M | −$46.2M |
ICSCX Assets Under Management
Net assets of William Blair Small Cap Value Fund by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-06-30 | $1.05B |
| 2026-03-31 | $936.04M |
| 2025-12-31 | $919.61M |
| 2025-09-30 | $1.07B |
| 2025-06-30 | $1.10B |
| 2025-03-31 | $1.17B |
| 2024-12-31 | $1.35B |
| 2024-09-30 | $1.33B |
| 2024-06-30 | $1.32B |
| 2024-03-31 | $1.40B |
| 2023-12-31 | $1.31B |
| 2023-09-30 | $1.21B |
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.