ACRNX Performance — Columbia Acorn Fund, Institutional Class
Data updated: 2026-08-28
ACRNX returned +21.80% year to date and +32.52% over one year to Jun 2026. Annualised returns are +15.25% over 3 years and +3.56% over 5 years. The fund beat its US Mid-Cap Blend category average: $100 invested three years ago grew to $153, against $150 for the category, and to $133 over one year, against $122. Volatility over the past three years was 20.07% a year. In the 12 months to Jun 2026 the fund lost a net $381.2M, and assets reached $2.77B.
ACRNX Growth of $100
What $100 invested in Columbia Acorn Fund grew to, compounded from monthly returns reported on SEC Form N-PORT, against the US Mid-Cap Blend category average over the same months.
| Period | ACRNX | Category average |
|---|---|---|
| 1 year (Jul 2025 – Jun 2026) | $133 | $122 |
| 3 years (Jul 2023 – Jun 2026) | $153 | $150 |
| 5 years (Jul 2021 – Jun 2026) | $119 | $147 |
| Since data start (Jul 2019 – Jun 2026) | $174 | $208 |
ACRNX Trailing Returns
Total returns to Jun 2026, from SEC N-PORT.
| Period | Total return |
|---|---|
| YTD | +21.80% |
| 1 year | +32.52% |
| 3 years (annualised) | +15.25% |
| 5 years (annualised) | +3.56% |
ACRNX Annual Returns
Calendar-year total returns of Columbia Acorn Fund, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2026 (Jan–Jun) | +21.80% |
| 2025 | +4.80% |
| 2024 | +14.43% |
| 2023 | +21.86% |
| 2022 | −33.78% |
| 2021 | +9.00% |
| 2020 | +29.52% |
| 2019 (Jul–Dec) | +4.46% |
ACRNX 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 | +4.8% | −0.3% | −8.8% | +13.2% | +5.6% | +6.9% | — | — | — | — | — | — |
| 2025 | +2.6% | −8.0% | −8.7% | −0.5% | +6.8% | +5.1% | +2.2% | +2.4% | +2.7% | +3.2% | +1.3% | −3.2% |
| 2024 | −1.6% | +7.4% | +3.6% | −6.6% | +1.5% | −0.9% | +5.1% | +1.2% | +2.7% | −0.4% | +9.6% | −6.8% |
| 2023 | +9.9% | −0.2% | +0.3% | −1.1% | −0.8% | +7.8% | +3.1% | −1.8% | −6.3% | −8.9% | +9.8% | +10.5% |
| 2022 | −15.8% | −0.2% | −1.8% | −14.1% | −3.7% | −7.7% | +15.3% | −2.8% | −9.5% | +6.7% | +2.8% | −5.6% |
| 2021 | +1.7% | +4.1% | −3.7% | +3.4% | −3.9% | +6.5% | +1.1% | +3.2% | −5.6% | +8.1% | −3.9% | −1.2% |
| 2020 | −0.2% | −7.6% | −14.6% | +13.7% | +11.7% | +1.0% | +5.7% | +2.8% | +0.7% | +0.4% | +10.5% | +5.5% |
| 2019 | — | — | — | — | — | — | +1.9% | −3.4% | −2.2% | +1.1% | +6.3% | +1.0% |
ACRNX Risk
Risk measures from monthly returns over Jul 2023 – Jun 2026.
- 3-year volatility (annualised): 20.07%
- 3-year Sharpe ratio: 0.54 (vs 4.5% risk-free rate)
- Best month: +13.20% (Apr 2026)
- Worst month: −8.90% (Oct 2023)
ACRNX Fund Flows
Monthly money in and out of Columbia Acorn Fund, from SEC Form N-PORT.
- 12-month net flow: −$381.2M
- 12-month gross sales (incl. reinvestments): $64.8M
- Sales ÷ redemptions: 0.15×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| Jun 2026 | $27.5M | $29.5M | −$2.0M |
| May 2026 | $2.1M | $32.3M | −$30.2M |
| Apr 2026 | $2.4M | $30.9M | −$28.4M |
| Mar 2026 | $3.4M | $31.7M | −$28.2M |
| Feb 2026 | $2.7M | $26.4M | −$23.8M |
| Jan 2026 | $9.0M | $39.8M | −$30.9M |
| Dec 2025 | $2.6M | $58.5M | −$56.0M |
| Nov 2025 | $3.4M | $44.0M | −$40.6M |
| Oct 2025 | $3.5M | $40.6M | −$37.0M |
| Sep 2025 | $2.3M | $34.4M | −$32.1M |
| Aug 2025 | $2.9M | $37.1M | −$34.2M |
| Jul 2025 | $3.0M | $40.8M | −$37.8M |
ACRNX Assets Under Management
Net assets of Columbia Acorn Fund by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-06-30 | $2.77B |
| 2026-03-31 | $2.25B |
| 2025-12-31 | $2.44B |
| 2025-09-30 | $2.54B |
| 2025-06-30 | $2.46B |
| 2025-03-31 | $2.28B |
| 2024-12-31 | $2.73B |
| 2024-09-30 | $2.79B |
| 2024-06-30 | $2.67B |
| 2024-03-31 | $2.94B |
| 2023-12-31 | $2.79B |
| 2023-09-30 | $2.62B |
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.