CPXRX
Columbia Mid Cap Index Fund
COLUMBIA FUNDS SERIES TRUST
Index fund
Expense ratio1
0.20%
Net assets2
$2.58B
Holdings2
402
Category
US Equity
2025 return3
7.33%

Investment objective & strategy

As of June 26, 2025 · prospectus

Objective. Columbia Mid Cap Index Fund (the Fund) seeks total return before fees and expenses that corresponds to the total return of the Standard & Poors (S&P) MidCap 400 Index.

Strategy. Under normal circumstances, the Fund invests at least 80% of its net assets (including the amount of any borrowings for investment purposes) in common stocks that comprise the S&P MidCap 400 Index (the Index). The Fund also may invest in real estate investment trusts. The Fund may invest in derivatives, such as futures (including equity index futures), for cash equitization purposes. Different common stocks have different weightings in the Index, depending on the amount of stock outstanding and the stocks current price. In seeking to match the performance of the Index, Columbia Management Investment Advisers, LLC (the Investment Manager) attempts to allocate the Funds assets among common stocks in approximately the same weightings as the Index. This is referred to … Under normal circumstances, the Fund invests at least 80% of its net assets (including the amount of any borrowings for investment purposes) in common stocks that comprise the S&P MidCap 400 Index (the Index). The Fund also may invest in real estate investment trusts. The Fund may invest in derivatives, such as futures (including equity index futures), for cash equitization purposes. Different common stocks have different weightings in the Index, depending on the amount of stock outstanding and the stocks current price. In seeking to match the performance of the Index, Columbia Management Investment Advisers, LLC (the Investment Manager) attempts to allocate the Funds assets among common stocks in approximately the same weightings as the Index. This is referred to as a passive or indexing approach to investing. As a result of the Funds indexing approach to investing, the Fund will typically emphasize within the portfolio those economic sectors emphasized by the Index, such as the industrials sector. The Fund attempts to achieve at least a 95% correlation between the performance of the Index and the Funds investment results, before fees and expenses.

Top holdings

As of Feb. 28, 2026 · N-PORT
SecurityTickerValue% of fund
LUMENTUM HOLDINGS INC $36.64M 1.42%
COLUMBIA SHORT TERM CASH FUND $31.77M 1.23%
COHERENT CORP $30.01M 1.16%
TECHNIPFMC PLC $19.78M 0.77%
CURTISS WRIGHT CORPORATION $19.04M 0.74%
CASEY'S GENERAL $18.80M 0.73%
XPO LOGISTICS INC $18.22M 0.71%
ROYAL GOLD INC $17.91M 0.69%
FLEX LTD $17.18M 0.67%
WOODWARD INC $17.10M 0.66%
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Allocation by sector

As of February 28, 2026 · N-PORT
View portfolio breakdown →

Portfolio moves

Nov 30, 2025 → Feb 28, 2026
Opened
16
Exited
17
Increased
7
Decreased
379
Unchanged
0

How 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.

View portfolio moves →

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Advisers

As of February 28, 2025 · N-CEN
FirmRole
Columbia Management Investment Advisers, LLC Adviser

Footnotes

  1. Expense ratio as of June 26, 2025, from the fund's prospectus.
  2. Net assets and holdings count as of February 28, 2026, from the fund's N-PORT filing.
  3. 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).

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