Investment objective & strategy
As of April 25, 2025 · prospectusObjective. Wanger Acorn (the Fund) seeks long-term capital appreciation.
Strategy. Under normal circumstances, the Fund invests a majority of its net assets in the common stock of small- and mid-sized companies with market capitalizations generally in the range of market capitalizations in the Russell 2500 Growth Index (the Index) at the time of purchase (between $ 5.2 million and $ 31.9 billion as of March 31, 2025 ). The market capitalization range and composition of companies in the Index are subject to change. The Fund invests the majority of its assets in U.S. companies, but also may invest up to 33% of its total assets in foreign companies in developed markets (for example, Japan, Canada and the United Kingdom) and in emerging markets (for example, China, India and Brazil). The … Under normal circumstances, the Fund invests a majority of its net assets in the common stock of small- and mid-sized companies with market capitalizations generally in the range of market capitalizations in the Russell 2500 Growth Index (the Index) at the time of purchase (between $ 5.2 million and $ 31.9 billion as of March 31, 2025 ). The market capitalization range and composition of companies in the Index are subject to change. The Fund invests the majority of its assets in U.S. companies, but also may invest up to 33% of its total assets in foreign companies in developed markets (for example, Japan, Canada and the United Kingdom) and in emerging markets (for example, China, India and Brazil). The Fund may at times emphasize one or more sectors in selecting its investments, including the consumer discretionary, health care, industrials, and information technology sectors.
Top holdings
As of March 31, 2026 · N-PORT| Security | Ticker | Value | % of fund |
|---|---|---|---|
| SPX TECHNOLOGIES INC | — | $10.76M | 2.48% |
| INSMED INC | — | $10.62M | 2.45% |
| CELESTICA INC SUB VTG | — | $9.34M | 2.15% |
| CHURCHILL DOWNS INC | — | $9.30M | 2.15% |
| CARLYLE GROUP INC (THE) | — | $8.82M | 2.04% |
| CURTISS WRIGHT CORPORATION | — | $8.62M | 1.99% |
| VIAVI SOLUTIONS INC | — | $8.52M | 1.96% |
| STERLING INFRASTRUCTURE INC | — | $8.45M | 1.95% |
| GCM GROSVENOR INC - CLASS A | — | $8.24M | 1.90% |
| INTERDIGITAL INC | — | $8.19M | 1.89% |
Portfolio moves
Dec 31, 2025 → Mar 31, 2026How many positions this fund opened, exited, grew, trimmed, or left unchanged between its two most recent N-PORT snapshots — net changes between point-in-time reports, not a trade log.
Similar funds
Funds whose portfolios most overlap this one, by weight| Fund | Overlap | Net exp. |
|---|---|---|
| Columbia Acorn Fund · LACAX, LIACX, ACRNX, CRBRX, CRBYX, ACRSX | 100% | 0.74% |
| Columbia Variable Portfolio - Small Company Growth Fund | 23% | 0.87% |
| Allspring SMID Cap Growth Fund · WFDDX, WFDSX, WFDAX, WDSCX, WFDRX | 23% | 0.79% |
Advisers
| Firm | Role |
|---|---|
| Columbia Management Investment Advisers, LLC | Adviser |
Footnotes
- Expense ratio as of April 25, 2025, from the fund's prospectus.
- Net assets and holdings count as of March 31, 2026, from the fund's N-PORT filing.
- Total return for calendar year 2025, before tax and after fund expenses. Computed by compounding the twelve monthly total returns the fund reported in its SEC N-PORT filings for 2025 (the latest prospectus does not yet chart this year).
Machine-readable: JSON · Markdown. Programmatic access via the agent surface.