Columbia Funds Series Trust I

Columbia Diversified Real Return Fund

Summary of the Fund

Investment Objective

Columbia Diversified Real Return Fund (the Fund) seeks to provide shareholders with total return that exceeds the rate of inflation over the long term.

Fees and Expenses of the Fund

This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. You may qualify for sales charge discounts if you and members of your immediate family invest, or agree to invest in the future, at least $50,000 in certain classes of shares of eligible funds distributed by Columbia Management Investment Distributors, Inc. More information about these and other discounts is available from your financial intermediary, and can be found in the Choosing a Share Class section beginning on page 25 of the Fund’s prospectus and in Appendix S to the Statement of Additional Information (SAI) under Sales Charge Waivers beginning on page S-1.

Shareholder Fees (fees paid directly from your investment)
	Class A	Class C	Classes R4, R5 and Z
Maximum sales charge (load) imposed on purchases (as a % of offering price)	4.75%	None	None
Maximum deferred sales charge (load) imposed on redemptions (as a % of the lower of the original purchase price or current net asset value)	1.00% ^(a)	1.00% ^(b)	None

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
	Class A	Class C	Class R4	Class R5	Class Z
Management fees^(c)	0.22%	0.22%	0.22%	0.22%	0.22%
Distribution and/or service (12b-1) fees	0.25%	1.00%	0.00%	0.00%	0.00%
Other expenses^(d)	1.56%	1.56%	1.56%	1.41%	1.56%
Acquired fund fees and expenses^(e)	0.50%	0.50%	0.50%	0.50%	0.50%
Total annual Fund operating expenses	2.53%	3.28%	2.28%	2.13%	2.28%
Less: Fee waivers and/or expense reimbursements^(f)	(1.33%)	(1.33%)	(1.33%)	(1.28%)	(1.33%)
Total annual Fund operating expenses after fee waivers and/or expense reimbursements	1.20%	1.95%	0.95%	0.85%	0.95%

(a)	This charge is imposed on certain investments of between $1 million and $50 million redeemed within 18 months of purchase, as follows: 1.00% if redeemed within 12 months of purchase, and 0.50% if redeemed more than 12, but less than 18, months after purchase, with certain limited exceptions.
(b)	This charge applies to redemptions within one year of purchase, with certain limited exceptions.
(c)	Management fees are based on estimated amounts for the Fund’s current fiscal year.
(d)	Other expenses are based on estimated amounts for the Fund’s current fiscal year.
(e)	Acquired fund fees and expenses are based on estimated amounts for the current fiscal year.
(f)	Columbia Management Investment Advisers, LLC and certain of its affiliates have contractually agreed to waive fees and/or to reimburse expenses (excluding transaction costs and certain other investment related expenses, interest, taxes, acquired fund fees and expenses, and extraordinary expenses) until May 31, 2015, unless sooner terminated at the sole discretion of the Fund’s Board of Trustees. Under this agreement, the Fund’s net operating expenses, subject to applicable exclusions, will not exceed the annual rates of 0.70% for Class A, 1.45% for Class C, 0.45% for Class R4, 0.35% for Class R5 and 0.45% for Class Z.

Prospectus 2014

Columbia Diversified Real Return Fund

Summary of the Fund (continued)

Example

The following example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example illustrates the hypothetical expenses that you would incur over the time periods indicated, and assumes that:

■	you invest $10,000 in the applicable class of Fund shares for the periods indicated,
■	your investment has a 5% return each year, and
■	the Fund’s total annual operating expenses remain the same as shown in the Annual Fund Operating Expenses table above.

Since the waivers and/or reimbursements shown in the Annual Fund Operating Expenses table above expire as indicated in the preceding table, they are only reflected in the 1 year example and the first year of the other examples. Although your actual costs may be higher or lower, based on the assumptions listed above, your costs (based on estimated Fund expenses) would be:

	1 year	3 years
Class A (whether or not shares are redeemed)	$591	$1,104
Class C (assuming redemption of all shares at the end of the period)	$298	$ 886
Class C (assuming no redemption of shares)	$198	$ 886
Class R4 (whether or not shares are redeemed)	$ 97	$ 584
Class R5 (whether or not shares are redeemed)	$ 87	$ 543
Class Z (whether or not shares are redeemed)	$ 97	$ 584

Portfolio Turnover

The Fund may pay transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund’s performance. Because the Fund is newly organized, portfolio turnover information is not available as of the date of this prospectus.

Principal Investment Strategies

Under normal circumstances, the Fund pursues its investment objective by allocating its assets to achieve exposure to inflation-linked debt securities, investments that provide economic exposure to the performance of commodities markets (commodity-linked investments) and floating rate loans and other floating rate debt securities (floating rate investments), as well as other investments.

The Fund’s investment exposure to inflation-linked (or inflation-protected) debt securities may include exposure to investments issued by the U.S. Government, non-U.S. governments, quasi-governmental organizations, agencies, instrumentalities, supranational entities and/or companies. Inflation-linked debt securities are fixed-income securities that are structured to provide protection against inflation. The Fund’s investment exposure to commodity-linked investments may include investment in an underlying fund, Columbia Commodity Strategy Fund, that is designed to provide exposure to the investment return of assets that trade in the commodities markets, without investing directly in physical commodities. The Fund’s investment exposure to floating rate investments may include investments in floating rate loans (including senior secured floating rate loans), which are debt obligations of companies and other similar entities that have interest rates that adjust or “float” periodically. These debt obligations may be of any quality, including those rated below investment grade by recognized rating agencies (similar to “junk bonds”) or, if unrated, considered to be of comparable quality. While the Fund seeks to achieve commodities exposure indirectly through investment in an underlying fund, the Fund may seek to achieve other exposures directly or indirectly through investment in affiliated funds, including Columbia Global Inflation-Linked Bond Plus Fund, Columbia Inflation Protected Securities Fund, Columbia Floating Rate Fund and any other Columbia fund that offers a desired exposure, as well as in unaffiliated funds, including exchange-traded funds (ETFs). Certain of these investments will include exposure to alternative investment strategies (e.g., Columbia Commodity Strategy Fund, a registered commodity pool).

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Columbia Diversified Real Return Fund

Summary of the Fund (continued)

The Fund’s assets may also be allocated to equity (common and preferred stock), convertible and other fixed income securities of U.S. and international issuers, which includes developed, developing and emerging market issuers, investments of any market capitalization, and investments of any sector/industry exposure, including, for example, exposure to real estate securities. The Fund’s fixed income investments may be of any maturity or quality, including instruments that are rated below investment-grade (commonly referred to as “high yield securities” or “junk bonds”) or, if unrated, are deemed to be of comparable quality. The Fund may invest in the above instruments directly or indirectly through investments in unaffiliated or affiliated funds, including Columbia High Yield Bond Fund, Columbia Income Opportunities Fund and Columbia Limited Duration Credit Fund, amongst other available funds. The Fund does not seek to maintain a particular dollar-weighted average maturity. The Fund may also hold/invest in cash, money market instruments (which may include investments in one or more affiliated or unaffiliated money market funds or similar vehicles) or other high-quality, short-term investments, including for the purpose of covering its obligations with respect to, or that may result from, the Fund’s investments in derivatives.

Principal Risks

An investment in the Fund involves risk, including those described below. There is no assurance that the Fund will achieve its investment objective and you may lose money. The value of the Fund’s holdings may decline, and the Fund’s net asset value (NAV) and share price may go down.

Active Management Risk. Due to its active management, the Fund could underperform its benchmark index and/or other funds with similar investment objectives. The Fund may fail to achieve its investment objective and you may lose money.

Allocation Risk. The Fund uses an asset allocation strategy in pursuit of its investment objective. There is a risk that the Fund's allocation among securities, instruments, investment styles and market exposures will cause the Fund's shares to lose value or cause the Fund to underperform other funds with a similar investment objective and/or strategies, or that the investments themselves will not produce the returns expected.

Alternative Strategies Investment Risk. An investment in alternative investment strategies (Alternative Strategies), whether through direct investment or through an underlying fund(s), involve risks, which may be significant. Alternative Strategies may include strategies, instruments or other assets, such as derivatives, that seek investment returns uncorrelated to the broad equity and fixed income/debt markets, as well as those providing exposure to other markets (such as commodity markets), including but not limited to absolute (positive) return strategies. Alternative Strategies may fail to achieve their desired performance, market or other exposure, or their returns (or lack thereof) may be more correlated to the broad equity and/or fixed income/debt markets than was anticipated, and the fund may lose money.

Confidential Information Access Risk. The Investment Manager normally will seek to avoid the receipt of material, non-public information (Confidential Information) about the issuers of floating rate loans (including from the issuer itself) being considered for acquisition by the Fund, or held in the Fund. The investment manager’s decision not to receive Confidential Information may disadvantage the Fund and could adversely affect the Fund’s performance.

Convertible Securities Risk. Convertible securities are subject to the usual risks associated with debt securities, such as interest rate risk and credit risk. Convertible securities also react to changes in the value of the common stock into which they convert, and are thus subject to market risk. The Fund may also be forced to convert a convertible security at an inopportune time, which may decrease the Fund’s return.

Counterparty Risk. Counterparty risk is the risk that a counterparty to a financial instrument held by the Fund or by a special purpose or structured vehicle invested in by the Fund may become insolvent or otherwise fail to perform its obligations. As a result, the Fund may obtain no or limited recovery of its investment, and any recovery may be significantly delayed.

Prospectus 2014

Columbia Diversified Real Return Fund

Summary of the Fund (continued)

Credit Risk. Credit risk is the risk that loans or other securities in the Fund’s portfolio may or will decline in price or fail to pay interest or repay principal when due because the borrower of the loan or the issuer of the security may or will default or otherwise become unable or unwilling, or is perceived to be unable or unwilling, to honor its financial obligations (such as making payments to the Fund), including as a result of bankruptcy. Bankruptcies may cause a delay to the Fund in acting on the collateral securing a loan, which may adversely affect the Fund. Further, there is risk that a court could take action adverse to the holders of a loan. A default or expected default of a loan could also make it difficult for the Fund to sell the loan at a price approximating the value previously placed on it. Lower quality or unrated loans or securities held by the Fund may present increased credit risk. In order to enforce its rights in the event of a default, bankruptcy or similar situation, the Fund may be required to retain legal or similar counsel. This may increase the Fund’s operating expenses and adversely affect net asset value. Loans that have a lower priority for repayment in an issuer’s capital structure may involve a higher degree of overall risk than more senior loans of the same borrower.

Derivatives Risk/Commodity-Linked Structured Notes Risk. Investments in commodity-linked structured notes involve substantial risks, including risk of loss of interest and principal, lack of a liquid secondary market, and risk of greater volatility than investments in traditional equity and debt markets. These instruments involve additional risks, including counterparty risk and hedging risk.

Derivatives Risk/Commodity-Linked Swaps Risk. Commodity-linked swaps could result in losses if the underlying asset (e.g., a particular commodity) or reference does not perform as anticipated. The value of swaps, like many other derivatives, may move in unexpected ways and may result in losses for the Fund. Such transactions can have the potential for unlimited losses. Such risk is heightened in the case of short swap transactions. Swaps can involve greater risks than direct investment in the underlying asset, because swaps may be leveraged (creating leverage risk) and are subject to counterparty risk, hedging risk, pricing risk and liquidity risk.

Derivatives Risk/Futures Contracts Risk. The loss that may be incurred in entering into futures contracts may exceed the amount of the premium paid and may be potentially unlimited. Futures markets are highly volatile and the use of futures may increase the volatility of the Fund’s NAV. Additionally, as a result of the low collateral deposits normally involved in futures trading, a relatively small price movement in a futures contract may result in substantial losses to the Fund. Futures contracts may be illiquid. Furthermore, exchanges may limit fluctuations in futures contract prices during a trading session by imposing a maximum permissible price movement on each futures contract. The Fund may be disadvantaged if it is prohibited from executing a trade outside the daily permissible price movement. Futures contracts executed on foreign exchanges may not provide the same protection as U.S. exchanges. These transactions involve additional risks, including counterparty risk, hedging risk and pricing risk.

Emerging Market Securities Risk. Securities issued by foreign governments or companies in emerging market countries are more likely to have greater exposure to the risks of investing in foreign securities that are described in Foreign Securities Risk. In addition, emerging market countries are more likely to experience instability resulting, for example, from rapid changes or developments in social, political and economic conditions. Their economies are usually less mature and their securities markets are typically less developed with more limited trading activity (i.e., lower trading volumes and less liquidity) than more developed countries. Emerging market securities tend to be more volatile than securities in more developed markets. Many emerging market countries are heavily dependent on international trade and have fewer trading partners, which makes them more sensitive to world commodity prices and economic downturns in other countries, and some have a higher risk of currency devaluations.

Exchange-Traded Fund (ETF) Risk. ETFs are subject to, among other risks, tracking risk and passive and, in some cases, active investment risk. In addition, shareholders bear both their proportionate share of the Fund’s expenses and similar expenses incurred through ownership of the ETF.

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Columbia Diversified Real Return Fund

Summary of the Fund (continued)

Foreign Securities Risk. Investments in or exposure to foreign securities involve certain risks not associated with investments in or exposure to securities of U.S. companies. Foreign securities subject the Fund to the risks associated with investing in the particular country, including the political, regulatory, economic, social, diplomatic and other conditions or events occurring in the country or region, as well as risks associated with less developed custody and settlement practices. Foreign securities may be more volatile and less liquid than investments in securities of U.S. companies. The performance of the Fund may be negatively impacted by foreign currency strength or weakness relative to the U.S. dollar, particularly where the Fund invests a significant percentage of its assets in foreign securities or other assets denominated in currencies other than the U.S. dollar.

Fund-of-Funds Risk. There is risk that the Fund portfolio managers’ investment determinations regarding asset classes or underlying funds and the Fund’s allocations thereto may not be successful, in whole or in part. The ability of the Fund to realize its investment objective will depend, in large part, on the extent to which the underlying funds realize their investment objective. There is no guarantee that the underlying funds will achieve their investment objective. The Fund is exposed to the same risks as the underlying funds in direct proportion to the allocation of its assets among the underlying funds. By investing in a combination of underlying funds, the Fund has exposure to the risks of many areas of the market. The performance of underlying funds could be adversely affected if other entities that invest in the same underlying funds make relatively large investments or redemptions in such underlying funds. The Fund, and its shareholders, indirectly bear a portion of the expenses of any funds in which the Fund invests. Because the expenses and costs of a fund are shared by its investors, redemptions by other investors in the fund could result in decreased economies of scale and increased operating expenses for such fund. The Investment Manager may have potential conflicts of interest in selecting affiliated underlying funds for investment by the Fund because the fees paid to it by some underlying funds are higher than the fees paid by other underlying funds, as well as a potential conflict in selecting affiliated funds over unaffiliated funds.

Highly Leveraged Transactions Risk. The loans or other securities in which the Fund invests may include highly leveraged transactions whereby the borrower assumes large amounts of debt in order to have the financial resources to attempt to achieve its business objectives. Loans or securities that are part of highly leveraged transactions involve a greater risk (including default and bankruptcy) than other investments.

High-Yield Securities Risk. Securities rated below investment grade (commonly called “high-yield” or “junk” bonds) and unrated securities of comparable quality expose the Fund to a greater risk of loss of principal and income than a fund that invests solely or primarily in investment grade securities. In addition, these investments have greater price fluctuations, are less liquid and are more likely to experience a default than higher-rated securities. High-yield securities are considered to be predominantly speculative with respect to the issuer’s capacity to pay interest and repay principal.

Inflation-Protected Securities Risk. Inflation-protected debt securities tend to react to changes in real interest rates (i.e., nominal interest rates minus the expected impact of inflation). In general, the price of such securities falls when real interest rates rise, and rises when real interest rates fall. Interest payments on these securities will vary and may be more volatile than interest paid on ordinary bonds. In periods of deflation, the Fund may have no income at all from such investments.

Inflation Risk. Inflation risk is the uncertainty over the future real value (after inflation) of an investment. Inflation rates may change frequently and drastically as a result of various factors, including unexpected shifts in the domestic or global economy, and the Fund’s investments may not keep pace with inflation, which may result in losses to Fund investors.

Interest Rate Risk. Interest rate risk is the risk of losses attributable to changes in interest rates. In general, if prevailing interest rates rise, the values of debt securities will tend to fall, and if interest rates fall, the values of debt securities will tend to rise. Changes in the value of a debt security usually will not affect the amount of income the Fund receives from it but may affect the value of the Fund's shares. In general, the longer the maturity or duration of a debt security, the greater its sensitivity to changes in interest rates. Interest rate declines also may increase prepayments of debt obligations, which, in turn, would increase prepayment risk. As interest rates rise or spreads widen, the likelihood of prepayment decreases. Securities with floating interest rates are typically less sensitive to interest rate changes, but may decline in value if their interest rates do not rise as much as interest rates in general. Because rates on certain floating rate loans and other debt securities reset only periodically, changes in prevailing interest rates (and particularly sudden and significant changes) can be expected to cause fluctuations in the Fund’s net asset value.

Prospectus 2014

Columbia Diversified Real Return Fund

Summary of the Fund (continued)

Issuer Risk. An issuer in which the Fund invests may perform poorly, and the value of its securities may therefore decline, which would negatively affect the Fund’s performance. Poor performance may be caused by poor management decisions, competitive pressures, breakthroughs in technology, reliance on suppliers, labor problems or shortages, corporate restructurings, fraudulent disclosures, natural disasters or other events, conditions or factors.

Liquidity Risk. Liquidity risk is the risk associated with a lack of marketability of securities which may make it difficult to sell the security at a desirable time or price. The Fund may have to lower the selling price of its investment, sell other investments, or forego another, more appealing investment opportunity. Floating rate loans generally are subject to legal or contractual restrictions on resale, may trade infrequently, and their value may be impaired when the Fund needs to liquidate such loans. Loans and other securities may trade only in the over-the-counter market rather than on an organized exchange and may be more difficult to purchase or sell at a fair price, which may have a negative impact on the Fund’s performance.

Market Risk. Market risk refers to the possibility that the market values of securities or other investments (including but not limited to loans, currencies, etc.) that the Fund holds will fall, sometimes rapidly or unpredictably, or fail to rise. An investment in the Fund could lose money over short or even long periods. In general, commodity investments tend to have greater price volatility than debt securities. In addition, commodity prices may be sensitive to rising interest rates, as the cost of capital rises and borrowing costs increase.

Preferred Stock Risk. Preferred stock is a type of stock that generally pays dividends at a specified rate and that has preference over common stock in the payment of dividends and the liquidation of assets. Preferred stock does not ordinarily carry voting rights. The price of a preferred stock is generally determined by earnings, type of products or services, projected growth rates, experience of management, liquidity, and general market conditions of the markets on which the stock trades. The most significant risks associated with investments in preferred stock include issuer risk, market risk and interest rate risk (i.e., the risk of losses attributable to changes in interest rates).

Prepayment and Extension Risk. Prepayment and extension risk is the risk that a loan, bond or other security or investment might be called or otherwise converted, prepaid or redeemed before maturity, and the portfolio managers may not be able to invest the proceeds in other investments providing as high a level of income, resulting in a reduced yield to the Fund. As interest rates decrease or spreads narrow, the likelihood of prepayment increases. Conversely, extension risk is the risk that an unexpected rise in interest rates will extend the life of a mortgage- or asset-backed security beyond the prepayment time. If the Fund's investments are locked in at a lower interest rate for a longer period of time, the portfolio managers may be unable to capitalize on securities with higher interest rates or wider spreads.

Real Estate-related Investment Risk. Investment in real estate investment trusts (REITs) and in securities of other companies (wherever organized) principally engaged in the real estate industry subjects the Fund to, among other risks, risks similar to those of direct investments in real estate and the real estate industry in general, including risks related to general and local economic conditions, possible lack of availability of financing and changes in interest rates or property values. REITs are entities that either own properties or make construction or mortgage loans, and also may include operating or finance companies. The value of REIT shares is affected by, among other factors, changes in the value of the underlying properties owned by the REIT, by changes in the prospect for earnings and/or cash flow growth of the REIT itself, defaults by borrowers or tenants, market saturation, decreases in market rates for rents, and other economic, political, or regulatory matters affecting the real estate industry, including REITs. REITs and similar non-U.S. entities depend upon specialized management skills, may have limited financial resources, may have less trading volume in their securities, and may be subject to more abrupt or erratic price movements than the overall securities markets. REITs are also subject to the risk of failing to qualify for tax-free pass-through of income. Some REITs (especially mortgage REITs) are affected by risks similar to those associated with investments in debt securities including changes in interest rates and the quality of credit extended.

Reinvestment Risk. Reinvestment risk is the risk that the Fund will not be able to reinvest income or principal at the same return it is currently earning.

Small- and Mid-Cap Company Securities Risk. Investments in small- and mid-capitalization companies (small- and mid-cap companies) often involve greater risks than investments in larger, more established companies (larger companies) because small- and mid-cap companies tend to have less predictable earnings and may lack the management experience, financial resources, product diversification and competitive strengths of larger companies, and securities of small- and mid-cap companies may be less liquid and more volatile than the securities of larger companies.

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Columbia Diversified Real Return Fund

Summary of the Fund (continued)

Sovereign Debt Risk. A sovereign debtor’s willingness or ability to repay principal and pay interest in a timely manner may be affected by a variety of factors, including its cash flow situation, the extent of its reserves, the availability of sufficient foreign exchange on the date a payment is due, the relative size of the debt service burden to the economy as a whole, the sovereign debtor’s policy toward international lenders, and the political constraints to which a sovereign debtor may be subject. Sovereign debt risk is increased for emerging market issuers.

Performance Information

The Fund is new as of the date of this prospectus and therefore performance information is not available.

When available, the Fund intends to compare its performance to the performance of the Citigroup 3-Month U.S. Treasury Bill Index and a blended benchmark that consists of 35% Barclays Global Inflation Linked Index (Hedged), 30% Credit Suisse Leveraged Loan Index, 20% Barclays U.S. Dollar Floating Rate Note (FRN) Index and 15% Dow Jones-UBS Commodity Index.

When available, updated performance information can be obtained by calling toll-free 800.345.6611 or visiting columbiamanagement.com.

Fund Management

Investment Manager: Columbia Management Investment Advisers, LLC

Portfolio Manager	Title	Role with Fund	Managed Fund Since
Jeffrey Knight, CFA	Managing Director and Head of Global Asset Allocation	Co-manager	March 2014
Orhan Imer, Ph.D., CFA	Portfolio Manager	Co-manager	March 2014

Purchase and Sale of Fund Shares

You may purchase or redeem shares of the Fund on any business day by contacting the Fund in the ways described below:

Online		Regular Mail		Express Mail		By Telephone
columbiamanagement.com		Columbia Funds, c/o Columbia Management Investment Services Corp. P.O. Box 8081 Boston, MA 02266-8081		Columbia Funds, c/o Columbia Management Investment Services Corp. 30 Dan Road, Suite 8081 Canton, MA 02021-2809		800.422.3737

You may purchase shares and receive redemption proceeds by electronic funds transfer, by check or by wire. If you maintain your account with a broker-dealer or other financial intermediary, you must contact that financial intermediary to buy, exchange or sell shares of the Fund in or from your account with the intermediary.

The minimum initial investment amounts for the share classes offered by the Fund are shown below:

Minimum Initial Investment

Class	Category of eligible account	For accounts other than systematic investment plan accounts	For systematic investment plan accounts
Class A & C	Nonqualified accounts	$2,000	$100
Class A & C	Individual retirement accounts	$1,000	$100
Class R4	All eligible accounts	None	None

Prospectus 2014

Columbia Diversified Real Return Fund

Summary of the Fund (continued)

Class	Category of eligible account	For accounts other than systematic investment plan accounts	For systematic investment plan accounts
Class R5	Combined underlying accounts of eligible registered investment advisers	$100,000	N/A
Class R5	Omnibus retirement plans	None	N/A
Class Z	All eligible accounts	$0, $1,000 or $2,000 depending upon the category of eligible investor.	$100

There is no minimum additional investment for any share class.

Tax Information

The Fund intends to distribute net investment income and net realized capital gains, if any, to shareholders. These distributions are generally taxable to you as ordinary income or capital gains, unless you are investing through a tax-advantaged account, such as a 401(k) plan or an IRA. If you are investing through a tax-advantaged account, you may be taxed upon withdrawals from that account.

Payments to Broker-Dealers and Other Financial Intermediaries

If you purchase the Fund through a broker-dealer or other financial intermediary (such as a bank), the Fund and its related companies — including Columbia Management Investment Advisers, LLC (the Investment Manager), Columbia Management Investment Distributors, Inc. (the Distributor) and Columbia Management Investment Services Corp. (the Transfer Agent) — may pay the intermediary for the sale of Fund shares and related services. These payments may create a conflict of interest by influencing the broker-dealer or other intermediary and your financial advisor to recommend the Fund over another investment. Ask your financial advisor or visit your financial intermediary’s website for more information.

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Columbia Diversified Real Return Fund

More Information About the Fund

Investment Objective

Columbia Diversified Real Return Fund (the Fund) seeks to provide shareholders with total return that exceeds the rate of inflation over the long term. The Fund’s investment objective is not a fundamental policy and may be changed by the Fund’s Board of Trustees without shareholder approval. Because any investment involves risk, there is no assurance the Fund’s objective will be achieved.

Principal Investment Strategies

The Fund’s investment exposure to inflation-linked (or inflation-protected) debt securities may include exposure to investments issued by the U.S. Government, non-U.S. governments, quasi-governmental organizations, agencies, instrumentalities, supranational entities and/or companies. Inflation-linked debt securities are fixed-income securities that are structured to provide protection against inflation. The Fund’s investment exposure to commodity-linked investments may include investment in an underlying fund, Columbia Commodity Strategy Fund, that is designed to provide exposure to the investment return of assets that trade in the commodities markets, without investing directly in physical commodities. The Fund’s investment exposure to floating rate investments may include investments in floating rate loans (including senior secured floating rate loans), which are debt obligations of companies and other similar entities that have interest rates that adjust or “float” periodically (normally on a daily, monthly, quarterly or semiannual basis by reference to a base lending rate (such as LIBOR (London Interbank Offered Rate)) plus a premium). These debt obligations may be of any quality, including those rated below investment grade by recognized rating agencies (similar to “junk bonds”) or, if unrated, considered to be of comparable quality. While the Fund seeks to achieve commodities exposure indirectly through investment in an underlying fund, the Fund may seek to achieve other exposures directly or indirectly through investment in affiliated funds, including Columbia Global Inflation-Linked Bond Plus Fund, Columbia Inflation Protected Securities Fund, Columbia Floating Rate Fund and any other Columbia fund that offers a desired exposure, as well as in unaffiliated funds, including exchange-traded funds (ETFs). Certain of these investments will include exposure to alternative investment strategies (e.g., Columbia Commodity Strategy Fund, a registered commodity pool).

The Fund’s assets may also be allocated to equity (common and preferred stock), convertible and other fixed income securities of U.S. and international issuers, which includes developed, developing and emerging market issuers, investments of any market capitalization, and investments of any sector/industry exposure, including, for example, exposure to real estate securities. The Fund’s fixed income investments may be of any maturity or quality, including instruments that are rated below investment-grade (commonly referred to as “high yield securities” or “junk bonds”) or, if unrated, are deemed to be of comparable quality. The Fund may invest in the above instruments directly or indirectly through investment in unaffiliated or affiliated funds, including Columbia High Yield Bond Fund, Columbia Income Opportunities Fund and Columbia Limited Duration Credit Fund, amongst other available funds. The Fund does not seek to maintain a particular dollar-weighted average maturity. The Fund may also hold/invest in cash, money market instruments (which may include investments in one or more affiliated or unaffiliated money market funds or similar vehicles) or other high-quality, short-term investments, including for the purpose of covering its obligations with respect to, or that may result from, the Fund’s investments in derivatives.

The Investment Manager employs a variety of fundamental and quantitative investment strategies, techniques and practices that, in the aggregate, are designed to seek positive long-term returns that exceed the rate of inflation.

The Investment Manager allocates the Fund’s investments to desired exposures based on the portfolio managers’ analysis of the relative attractiveness of opportunities for the Fund to achieve its objective in a given market, based on, among other factors, an investment’s potential to exploit inefficiencies or mispricings within individual markets or across markets, as well as the portfolio manager’s projected outlook for inflation expectations along with other macroeconomic factors.

Principal Risks

Prospectus 2014

Columbia Diversified Real Return Fund

More Information About the Fund (continued)

Active Management Risk. The Fund is actively managed and its performance therefore will reflect, in part, the ability of the portfolio managers to select investments and to make investment decisions that are suited to achieving the Fund’s investment objective. Due to its active management, the Fund could underperform its benchmark index and/or other funds with similar investment objectives and/or strategies. The Fund may fail to achieve its investment objective and you may lose money.

Commodity-related Investment Risk. The value of commodities investments will generally be affected by overall market movements and factors specific to a particular industry or commodity, which may include demand for the commodity, weather, embargoes, tariffs, and economic health, political, international, regulatory and other developments. Economic and other events (whether real or perceived) can reduce the demand for commodities, which may, in turn, reduce market prices and cause the value of underlying fund shares (and therefore the Fund’s shares) to fall. The frequency and magnitude of such changes cannot be predicted. Exposure to commodities and commodities markets may subject the value of the underlying fund’s investments (and therefore the Fund) to greater volatility than other types of investments. No, or limited, active trading market may exist for certain commodities investments, which may impair the ability to sell or to realize the full value of such investments in the event of the need to liquidate such investments. In addition, adverse market conditions may impair the liquidity of actively traded commodities investments. Certain types of commodities instruments are subject to the risk that the counterparty to the instrument may not perform or be unable to perform in accordance with the terms of the instrument. The Fund invests in an underlying fund(s) that makes commodity-related investments through a wholly owned subsidiary organized outside the U.S. that is generally not subject to U.S. laws (including securities laws) and their protections; however, the subsidiary is wholly owned and controlled by the underlying fund(s), making it unlikely that the subsidiary will take action contrary to the interests of the underlying fund(s) and its shareholders. Further, any such subsidiaries will be subject to the laws of a foreign jurisdiction, and can be adversely affected by developments in that jurisdiction.

Confidential Information Access Risk. In managing the Fund, the Investment Manager normally will seek to avoid the receipt of material, non-public information (Confidential Information) about the issuers of floating rate loans being considered for acquisition by the Fund, or held in the Fund. In many instances, issuers of floating rate loans offer to furnish Confidential Information to prospective purchasers or holders of the issuer’s floating rate loans to help potential investors assess the value of the loan. The Investment Manager’s decision not to receive Confidential Information from these issuers may disadvantage the Fund as compared to other floating rate loan investors, and may adversely affect the price the Fund pays for the loans it purchases, or the price at which the Fund sells the loans. Further, in situations when holders of floating rate loans are asked, for example, to grant consents, waivers or amendments, the Investment Manager’s ability to assess the desirability of such consents, waivers or amendments may be compromised. For these and other reasons, it is possible that the Investment Manager’s decision under normal circumstances not to receive Confidential Information could adversely affect the Fund’s performance.

Convertible Securities Risk. Convertible securities are subject to the usual risks associated with debt securities, such as interest rate risk (i.e., the risk of losses attributable to changes in interest rates) and credit risk (i.e., the risk that the issuer of a fixed-income security may or will default or otherwise become unable, or be perceived to be unable or unwilling, to honor a financial obligation, such as making payments to the Fund when due). Convertible securities also react to changes in the value of the common stock into which they convert, and are thus subject to market risk (i.e., the risk that the market values of securities or other investments that the Fund holds will fall, sometimes rapidly or unpredictably, or fail to rise). Because the value of a convertible security can be influenced by both interest rates and the common stock's market movements, a convertible security generally is not as sensitive to interest rates as a similar debt security, and generally will not vary in value in response to other factors to the same extent as the underlying common stock. In the event of a liquidation of the issuing company, holders of

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convertible securities would typically be paid before the company's common stockholders but after holders of any senior debt obligations of the company. The Fund may be forced to convert a convertible security before it otherwise would choose to do so, which may decrease the Fund's return.

Counterparty Risk. The risk exists that a counterparty to a financial instrument held by the Fund or by a special purpose or structured vehicle in which the Fund invests may become insolvent or otherwise fail to perform its obligations due to financial difficulties, including making payments to the Fund. The Fund may obtain no or limited recovery in a bankruptcy or other organizational proceedings, and any recovery may be significantly delayed. Transactions that the Fund enters into may involve counterparties in the financial services sector and, as a result, events affecting the financial services sector may cause the Fund’s share value to fluctuate.

Credit Risk. Credit risk is the risk that the borrower of a loan or the issuer of another debt security may or will default or otherwise become unable or unwilling, or is perceived to be unable or unwilling, to honor a financial obligation, such as making payments to the Fund. Rating agencies assign credit ratings to certain loans and other fixed-income securities to indicate their credit risk. The price of a loan or other debt security generally will fall if the borrower or the issuer defaults on its obligation to pay principal or interest, the rating agencies downgrade the credit rating of the borrower or the issuer or other news affects the market’s perception of the credit risk of the borrower or the issuer. If the issuer of a loan declares bankruptcy or is declared bankrupt, there may be a delay before the Fund can act on the collateral securing the loan, which may adversely affect the Fund. Further, there is a risk that a court could take action with respect to a loan adverse to the holders of the loan, such as invalidating the loan, the lien on the collateral, the priority status of the loan, or ordering the refund of interest previously paid by the borrower. Any such actions by a court could adversely affect the Fund’s performance. If the Fund purchases unrated loans or other debt securities, the Fund will depend on analysis of credit risk more heavily than usual. Non-investment grade loans or securities (commonly called “high-yield” or “junk”) have greater price fluctuations and are more likely to experience a default than investment grade loans or securities. A default or expected default of a loan could also make it difficult for the Fund to sell the loan at a price approximating the value previously placed on it. In order to enforce its rights in the event of a default, bankruptcy or similar situation, the Fund may be required to retain legal or similar counsel. This may increase the Fund’s operating expenses and adversely affect net asset value. Loans that have a lower priority for repayment in an issuer’s capital structure may involve a higher degree of overall risk than more senior loans of the same borrower.

Derivatives Risk. Losses involving derivative instruments may be substantial, because a relatively small movement in the price of an underlying security, instrument, commodity, currency or index may result in a substantial loss for the Fund. In addition to the potential for increased losses, the use of derivative instruments may lead to increased volatility within the Fund. Derivatives will typically increase the Fund’s exposure to principal risks to which it is otherwise exposed, and may expose the Fund to additional risks, including correlation risk (related to hedging risk, the risk that there may be an imperfect correlation between the hedge and the opposite position), counterparty risk (the risk that the counterparty to the instrument will not perform or be able to perform in accordance with the terms of the instrument), leverage risk (the risk that losses from the derivative instrument may be greater than the amount invested in the derivative instrument), hedging risk (the risk that a hedging strategy may not eliminate the risk that it is intended to offset), and liquidity risk (it may not be possible for the Fund to liquidate the instrument at an advantageous time or price), each of which may result in significant and unanticipated losses to the Fund.

Derivatives Risk/Commodity-Linked Structured Notes Risk. The use of commodity-linked structured notes is a highly specialized activity which involves investment techniques and risks different from those associated with ordinary portfolio securities transactions. The Fund’s investments in commodity-linked structured notes involve substantial risks, including risk of loss of interest and principal, lack of a secondary (i.e. liquid) market, and risk of greater volatility than investments in traditional equity and debt markets.

If payment of interest on a commodity-linked structured note is linked to the value of a particular commodity, commodity index or other economic variable, the Fund might receive lower interest payments (or not receive any of the interest due) on its investments if there is a loss of value of the underlying investment. Further, to the extent that the amount of principal to be repaid upon maturity is linked to the value of a particular commodity, commodity index or other economic variable, the Fund might not receive a portion (or any) of the principal at maturity of the investment or upon earlier exchange. At any time, the risk of loss associated with a particular structured note in the Fund’s portfolio may be significantly higher than the value of the note.

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A liquid secondary market may not exist for the commodity-linked structured notes held in the Fund’s portfolio, which may make it difficult for the notes to be sold at a price acceptable to the portfolio managers or to accurately value them. Investment in commodity-linked structured notes also subjects the Fund to counterparty risk (the risk that the counterparty to the instrument will not perform or be able to perform in accordance with the terms of the instrument) and hedging risk (the risk that a hedging strategy may not eliminate the risk that it is intended to offset), each of which may result in significant and unanticipated losses to the Fund.

The value of the commodity-linked structured notes may fluctuate significantly because the values of the underlying investments to which they are linked are themselves volatile. Additionally, the particular terms of a commodity-linked structured note may create economic leverage by requiring payment by the issuer of an amount that is a multiple of the price increase or decrease of the underlying commodity, commodity index, or other economic variable. Economic leverage will increase the volatility of the value of these commodity-linked notes as they may increase or decrease in value more quickly than the underlying commodity, commodity index or other economic variable.

Derivatives Risk/Commodity-Linked Swaps Risk. The use of commodity-linked swaps is a highly specialized activity which involves investment techniques and risks different from those associated with ordinary portfolio securities transactions. Commodity-linked swaps could result in losses if the underlying asset or reference does not perform as anticipated. The value of swaps, like many other derivatives, may move in unexpected ways and may result in losses for the Fund. Such transactions can have the potential for unlimited losses. Such risk is heightened in the case of short swap transactions. Swaps can involve greater risks than direct investment in the underlying asset, because swaps may be leveraged (creating leverage risk) and are subject to counterparty risk (the risk that the counterparty to the instrument will not perform or be able to perform in accordance with the terms of the instrument), hedging risk (the risk that a hedging strategy may not eliminate the risk that it is intended to offset), pricing risk (swaps may be difficult to value) and liquidity risk (it may not be possible to liquidate a swap position at an advantageous time or price), each of which may result in significant and unanticipated losses to the Fund.

Derivatives Risk/Futures Contracts Risk. The use of futures contracts is a highly specialized activity which involves investment techniques and risks different from those associated with ordinary portfolio securities transactions. A futures contract is a sales contract between a buyer (holding the “long” position) and a seller (holding the “short” position) for an asset with delivery deferred until a future date. The buyer agrees to pay a fixed price at the agreed future date and the seller agrees to deliver the asset. The seller hopes that the market price on the delivery date is less than the agreed upon price, while the buyer hopes for the contrary. The liquidity of the futures markets depends on participants entering into off-setting transactions rather than making or taking delivery. To the extent participants decide to make or take delivery, liquidity in the futures market could be reduced. In addition, futures exchanges often impose a maximum permissible price movement on each futures contract for each trading session. The Fund may be disadvantaged if it is prohibited from executing a trade outside the daily permissible price movement. Moreover, to the extent the Fund engages in futures contracts on foreign exchanges, such exchanges may not provide the same protection as U.S. exchanges. The loss that may be incurred in entering into futures contracts may exceed the amount of the premium paid and may be potentially unlimited. Futures markets are highly volatile and the use of futures may increase the volatility of the Fund’s NAV. Additionally, as a result of the low collateral deposits normally involved in futures trading, a relatively small price movement in a futures contract may result in substantial losses to the Fund. Investments in these instruments involve risks, including counterparty risk (the risk that a counterparty to the instrument will not perform or be able to perform in accordance with the terms of the instrument), hedging risk (the risk that a hedging strategy may not eliminate the risk that it is intended to offset) and pricing risk (the instrument may be difficult to value), each of which may result in significant and unanticipated losses to the Fund.

Emerging Market Securities Risk. Securities issued by foreign governments or companies in emerging market countries are more likely to have greater exposure to the risks of investing in foreign securities that are described in Foreign Securities Risk. In addition, emerging market countries are more likely to experience instability resulting, for example, from rapid changes or developments in social, political and economic conditions. Their economies are usually less mature and their securities markets are typically less developed with more limited trading activity (i.e., lower trading volumes and less liquidity) than more developed countries. Emerging market securities tend to be more volatile than securities in more developed markets. Many emerging market countries are heavily dependent on international trade and have fewer trading partners, which makes them more sensitive to world commodity prices and economic downturns in other countries. Some emerging market countries have a higher risk of currency devaluations, and some of these countries may experience periods of high inflation or rapid changes in inflation rates and may have hostile relations with other countries.

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Exchange-Traded Fund (ETF) Risk. An ETF’s share price may not track its specified market index (if any) and may trade below its net asset value. Certain ETFs use a “passive” investment strategy and do not take defensive positions in volatile or declining markets. Other ETFs in which the Fund may invest are actively managed, which indirectly subjects the Fund to active management risk. An active secondary market in ETF shares may not develop or be maintained and may be halted or interrupted due to actions by its listing exchange, unusual market conditions or other reasons. There can be no assurance that an ETF’s shares will continue to be listed on an active exchange. In addition, shareholders bear both their proportionate share of the Fund’s expenses and similar expenses incurred through ownership of the ETF. There is a risk that ETFs in which the Fund invests may terminate due to extraordinary events. For example, any of the service providers to ETFs, such as the trustee or sponsor, may close or otherwise fail to perform their obligations to the ETF, and the ETF may not be able to find a substitute service provider. Also, certain ETFs may be dependent upon licenses to use various indexes as a basis for determining their compositions and/or otherwise to use certain trade names. If these licenses are terminated, the ETFs may also terminate. In addition, an ETF may terminate if its net assets fall below a certain amount.

Foreign Securities Risk. Investments in or exposure to foreign securities involve certain risks not associated with investments in or exposure to securities of U.S. companies. For example, foreign markets can be extremely volatile. Foreign securities are primarily denominated in foreign currencies. The performance of the Fund may be negatively impacted by foreign currency strength or weakness relative to the U.S. dollar, particularly where the Fund invests or has exposure to a significant percentage of its assets in foreign securities or other assets denominated in currencies other than the U.S. dollar. Foreign securities may also be less liquid than domestic securities so that the Fund may, at times, be unable to sell foreign securities at desirable times or prices. Brokerage commissions, custodial costs and other fees are also generally higher for foreign securities. The Fund may have limited or no legal recourse in the event of default with respect to certain foreign securities, including those issued by foreign governments. In addition, foreign governments may impose withholding or other taxes on the Fund’s income and capital gain on foreign securities, which could reduce the Fund’s yield on such securities. Other risks include possible delays in the settlement of transactions or in the payment of income; generally less publicly available information about companies; the impact of economic, political, social, diplomatic or other conditions or events; possible seizure, expropriation or nationalization of a company or its assets; possible imposition of currency exchange controls; accounting, auditing and financial reporting standards that may be less comprehensive and stringent than those applicable to domestic companies; and the generally less stringent standard of care to which local agents may be held in the local markets. In addition, it may be difficult to obtain reliable information about the securities and business operations of certain foreign issuers. Governments or trade groups may compel local agents to hold securities in designated depositories that are not subject to independent evaluation. The less developed a country’s securities market is, the greater the level of risks.

Fund-of-Funds Risk. There is risk that the Fund portfolio managers’ investment determinations regarding asset classes or underlying funds and the Fund’s allocations thereto may not be successful, in whole or in part. There is also a risk that the selected underlying funds’ performance may be lower than the performance of the asset class they were selected to represent or may be lower than the performance of alternative underlying funds that could have been selected to represent the asset class. The Fund also is exposed to the same risks as the underlying funds in direct proportion to the allocation of its assets among the underlying funds. By investing in a combination of underlying funds, the Fund has exposure to the risks of many areas of the market. The ability of the Fund to realize its investment objective(s) will depend, in large part, on the extent to which the underlying funds realize their investment objective. There is no guarantee that the underlying funds will achieve their respective investment objectives. The performance of underlying funds could be adversely affected if other entities that invest in the same underlying funds make relatively large investments or redemptions in such underlying funds. The Fund, and its shareholders, indirectly bear a portion of the expenses of any funds in which the Fund invests. Because the expenses and costs of a fund are shared by its investors, redemptions by other investors in the fund could result in decreased economies of scale and increased operating expenses for such fund. These transactions might also result in higher brokerage, tax or other costs for a fund. This risk may be particularly important when one investor owns a substantial portion of a fund. The Investment Manager may have potential conflicts of interest in selecting affiliated underlying funds for investment by the Fund because the fees paid to it by some underlying funds are higher than the fees paid by other underlying funds.

Highly Leveraged Transactions Risk. The loans or other securities in which the Fund invests may consist of transactions involving refinancings, recapitalizations, mergers and acquisitions and other financings for general corporate purposes. The Fund’s investments also may include senior obligations of a borrower issued in connection with a restructuring pursuant to Chapter 11 of the U.S. Bankruptcy Code (commonly known as “debtor-in-possession” financings), provided that such senior

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obligations are determined by the Fund’s portfolio managers to be a suitable investment for the Fund. In such highly leveraged transactions, the borrower assumes large amounts of debt in order to have the financial resources to attempt to achieve its business objectives. Such business objectives may include but are not limited to: management’s taking over control of a company (leveraged buy-out); reorganizing the assets and liabilities of a company (leveraged recapitalization); or acquiring another company. Loans or securities that are part of highly leveraged transactions involve a greater risk (including default and bankruptcy) than other investments.

High-Yield Securities Risk. Securities rated below investment grade (commonly called “high-yield” or “junk” bonds) and unrated securities of comparable quality tend to be more sensitive to credit risk than higher-rated securities and may react more to perceived changes in the ability of the issuing entity or obligor to pay interest and principal when due than to changes in interest rates. These investments have greater price fluctuations and are more likely to experience a default than higher-rated securities. High-yield securities are considered to be predominantly speculative with respect to the issuer’s capacity to pay interest and repay principal. These securities typically pay a premium — a higher interest rate or yield — because of the increased risk of loss, including default. These securities may require a greater degree of judgment to establish a price, may be difficult to sell at the time and price the Fund desires, may carry high transaction costs, and also are generally less liquid than higher-rated securities. The securities ratings provided by third party rating agencies are based on analyses by these ratings agencies of the credit quality of the securities and may not take into account every risk related to whether interest or principal will be timely repaid. In adverse economic and other circumstances, issuers of lower-rated securities are more likely to have difficulty making principal and interest payments than issuers of higher-rated securities.

Inflation-Protected Securities Risk. Inflation-protected debt securities tend to react to changes in real interest rates. Real interest rates can be described as nominal interest rates minus the expected impact of inflation. In general, the price of an inflation-protected debt security falls when real interest rates rise, and rises when real interest rates fall. Interest payments on inflation-protected debt securities will vary as the principal and/or interest is adjusted for inflation and may be more volatile than interest paid on ordinary bonds. In periods of deflation, the Fund may have no income at all from such investments. Income earned by a shareholder depends on the amount of principal invested, and that principal will not grow with inflation unless the shareholder reinvests the portion of Fund distributions that comes from inflation adjustments.

Liquidity Risk. Liquidity risk is the risk associated with a lack of marketability of securities which may make it difficult to sell the security at a desirable time or price. The Fund may have to lower the selling price of its investment, sell other investments, or forego another, more appealing investment opportunity. Floating rate loans generally are subject to legal or contractual restrictions on resale. Floating rate loans also may trade infrequently on the secondary market. The value of the loan to the Fund may be impaired in the event that the Fund needs to liquidate such loans. The inability to purchase or sell floating rate loans and

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other debt securities at a fair price may have a negative impact on the Fund’s performance. Securities in which the Fund invests may be traded in the over-the-counter market rather than on an organized exchange and therefore may be more difficult to purchase or sell at a fair price. Judgment plays a larger role in valuing these investments as compared to valuing more liquid investments.

Market Risk. Market risk refers to the possibility that the market values of securities or other investments that the Fund holds will fall, sometimes rapidly or unpredictably, or fail to rise. Security values may fall or fail to rise because of a variety of factors affecting an issuer (e.g., an unfavorable earnings report), the industry or sector it operates in, or the markets as a whole, reducing the value of an investment in the Fund. Accordingly, an investment in the Fund could lose money over short or even long periods. The market values of the securities the Fund holds can be affected by the market’s perception of the issuer (or its industry or sector), changes or perceived changes in U.S. or foreign economies and financial markets, and the liquidity of these securities, among other factors. In general, commodity investments tend to have greater price volatility than debt securities. In addition, commodity prices may be sensitive to rising interest rates, as the cost of capital rises and borrowing costs increase.

Prepayment and Extension Risk. Prepayment and extension risk is the risk that a loan, bond or other security or investment might be called or otherwise converted, prepaid or redeemed before maturity. This risk is primarily associated with asset-backed securities, including mortgage-backed securities and floating rate loans. If the investment is converted, prepaid or redeemed before maturity, particularly during a time of declining interest rates or spreads, the portfolio managers may not be able to invest the proceeds in other investments providing as high a level of income, resulting in a reduced yield to the Fund. Conversely, as interest rates rise or spreads widen, the likelihood of prepayment decreases and the maturity of the investment may extend. Conversely, extension risk is the risk that an unexpected rise in interest rates will extend the life of a mortgage- or asset-backed security beyond the prepayment time. If the Fund's investments are locked in at a lower interest rate for a longer period of time, the portfolio managers may be unable to capitalize on securities with higher interest rates or wider spreads.

Reinvestment Risk. Reinvestment risk is the risk that the Fund will not be able to reinvest income or principal at the same return it is currently earning.

Small- and Mid-Cap Company Securities Risk. Securities of small- and mid-capitalization companies (small- and mid-cap companies) can, in certain circumstances, have a higher potential for gains than securities of larger, more established companies (larger companies) but may also have more risk. For example, small- and mid-cap companies may be more vulnerable to market downturns and adverse business or economic events than larger companies because they may have more limited financial resources and business operations. Small- and mid-cap companies are also more likely than larger companies to have more limited product lines and operating histories and to depend on smaller management teams. Securities of small- and mid-cap companies may trade less frequently and in smaller volumes and may be less liquid and fluctuate more sharply in value than

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securities of larger companies. When the Fund takes significant positions in small- and mid-cap companies with limited trading volumes, the liquidation of those positions, particularly in a distressed market, could be prolonged and result in losses to the Fund. In addition, some small- and mid-cap companies may not be widely followed by the investment community, which can lower the demand for their stocks.

With respect to sovereign debt of emerging market issuers, investors should be aware that certain emerging market countries are among the largest debtors to commercial banks and foreign governments. At times, certain emerging market countries have declared moratoria on the payment of principal and interest on external debt. Certain emerging market countries have experienced difficulty in servicing their sovereign debt on a timely basis and that has led to defaults and the restructuring of certain indebtedness to the detriment of debtholders. Sovereign debt risk is increased for emerging market issuers.

U.S. Government Obligations Risk. While U.S. Treasury obligations are backed by the “full faith and credit” of the U.S. Government, such securities are nonetheless subject to credit risk (i.e., the risk that the U.S. Government may be, or may be perceived to be, unable or unwilling to honor its financial obligations, such as making payments). Securities issued or guaranteed by federal agencies or authorities and U.S. Government-sponsored instrumentalities or enterprises may or may not be backed by the full faith and credit of the U.S. Government. For example, securities issued by the Federal Home Loan Mortgage Corporation, the Federal National Mortgage Association and the Federal Home Loan Banks are neither insured nor guaranteed by the U.S. Government. These securities may be supported by the ability to borrow from the U.S. Treasury or only by the credit of the issuing agency, authority, instrumentality or enterprise and, as a result, are subject to greater credit risk than securities issued or guaranteed by the U.S. Treasury.

Additional Investment Strategies and Policies

This section describes certain investment strategies and policies that the Fund may utilize in pursuit of its investment objective and some additional factors and risks involved with investing in the Fund.

Investment Guidelines

As a general matter, and except as specifically described in the discussion of the Fund's principal investment strategies in this prospectus, whenever an investment policy or limitation states a percentage of the Fund's assets that may be invested in any security or other asset or sets forth a policy regarding an investment standard, compliance with that percentage limitation or standard will be determined solely at the time of the Fund's investment in the security or asset.

Holding Other Kinds of Investments

The Fund may hold investments that are not part of its principal investment strategies. These investments and their risks are described below and/or in the SAI. The Fund may choose not to invest in certain securities described in this prospectus and in the SAI, although it has the ability to do so. For information on the Fund’s holdings, see the Fund’s shareholder reports.

Transactions in Derivatives

The Fund may enter into derivative transactions. Derivatives are financial contracts whose values are, for example, based on (or “derived” from) traditional securities (such as a stock or bond), assets (such as a commodity like gold or a foreign currency), reference rates (such as the London Interbank Offered Rate (commonly known as LIBOR)) or market indices (such as the Standard & Poor's (S&P) 500^® Index). The use of derivatives is a highly specialized activity which involves investment techniques and risks different from those associated with ordinary portfolio securities transactions. Derivatives involve special risks and may result in losses or may limit the Fund's potential gain from favorable market movements. Derivative strategies often involve leverage, which may exaggerate a loss, potentially causing the Fund to lose more money than it would have lost had it invested in the underlying security or other asset directly. The values of derivatives may move in unexpected ways, especially in unusual market conditions, and may result in increased volatility in the value of the derivative and/or the Fund’s shares, among other consequences. The use of derivatives may also increase the amount of taxes payable by shareholders holding shares in a taxable account. Other risks arise from the Fund's potential inability to terminate or to sell derivative positions. A

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liquid secondary market may not always exist for the Fund's derivative positions at times when the Fund might wish to terminate or to sell such positions. Over-the-counter instruments (investments not traded on an exchange) may be illiquid, and transactions in derivatives traded in the over-the-counter market are subject to the risk that the other party will not meet its obligations. The use of derivatives also involves the risks of mispricing or improper valuation and that changes in the value of the derivative may not correlate perfectly with the underlying security, asset, reference rate or index. The Fund also may not be able to find a suitable derivative transaction counterparty, and thus may be unable to engage in derivative transactions when it is deemed favorable to do so, or at all. U.S. federal legislation has been enacted that provides for new clearing, margin, reporting and registration requirements for participants in the derivatives market. These changes could restrict and/or impose significant costs or other burdens upon the Fund’s participation in derivatives transactions. For more information on the risks of derivative investments and strategies, see the SAI.

Investing in Affiliated Funds

The Investment Manager or an affiliate serves as investment adviser to mutual funds using the Columbia brand (Columbia Funds), including those that are structured as “fund-of-funds” (such as the Fund(s) offered in this prospectus) and provide asset-allocation services to shareholders by investing in shares of other Columbia Funds (collectively referred to in this section as Underlying Funds), and to discretionary managed accounts (collectively referred to as affiliated products) that invest exclusively in Underlying Funds. These affiliated products, individually or collectively, may own a significant percentage of the outstanding shares of one or more Underlying Funds, and the Investment Manager seeks to balance potential conflicts of interest between the affiliated products and the Underlying Funds in which they invest. The affiliated products’ investment in the Underlying Funds may have the effect of creating economies of scale, possibly resulting in lower expense ratios for the Underlying Funds, because the affiliated products may own substantial portions of the shares of Underlying Funds. However, redemption of Underlying Fund shares by one or more affiliated products could cause the expense ratio of an Underlying Fund to increase, as its fixed costs would be spread over a smaller asset base. Because of these large positions of the affiliated products, the Underlying Funds may experience relatively large purchases or redemptions. Although the Investment Manager or its affiliate may seek to minimize the impact of these transactions where possible, for example, by structuring them over a reasonable period of time or through other measures, Underlying Funds may experience increased expenses as they buy and sell securities to manage these transactions. Further, when the Investment Manager or its affiliate structures transactions over a reasonable period of time in order to manage the potential impact of the buy and sell decisions for the affiliated products, those affiliated products, including funds-of-funds, may pay more or less (for purchase activity), or receive more or less (for redemption activity), for shares of the Underlying Funds than if the transactions were executed in one transaction. In addition, substantial redemptions by the affiliated products within a short period of time could require the Underlying Fund to liquidate positions more rapidly than would otherwise be desirable, which may have the effect of reducing or eliminating potential gain or causing it to realize a loss. Substantial redemptions may also adversely affect the ability of the Underlying Fund to implement its investment strategy. The Investment Manager or its affiliate also has an economic conflict of interest in determining the allocation of the affiliated products’ assets among the Underlying Funds, as it earns different fees from the various Underlying Funds.

Investing in Money Market Funds

The Fund may invest cash in, or hold as collateral for certain investments, shares of registered or unregistered money market funds, including funds advised by the Investment Manager or its affiliates. These funds are not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency. The Fund and its shareholders indirectly bear a portion of the expenses of any money market fund or other fund in which the Fund may invest.

Investing Defensively

The Fund may from time to time take temporary defensive investment positions that may be inconsistent with the Fund’s principal investment strategies in attempting to respond to adverse market, economic, political, social or other conditions, including, without limitation, investing some or all of its assets in money market instruments or shares of affiliated or unaffiliated money market funds or holding some or all of its assets in cash or cash equivalents. The Fund may take such defensive investment positions for as long a period as deemed necessary.

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The Fund may not achieve its investment objective while it is investing defensively. Investing defensively may adversely affect Fund performance. During these times, the portfolio managers may make frequent portfolio holding changes, which could result in increased trading expenses and taxes, and decreased Fund performance. See also Investing in Money Market Funds above for more information.

Other Strategic and Investment Measures

The Fund may also from time to time take temporary portfolio positions that may or may not be consistent with the Fund’s principal investment strategies in attempting to respond to adverse market, economic, political, social or other conditions, including, without limitation, investing in derivatives, such as futures (e.g., index futures) or options on futures, for various purposes, including among others, investing in particular derivatives to achieve indirect investment exposures to a sector, country or region where the Investment Manager believes such positioning is appropriate. The Fund may take such portfolio positions for as long a period as deemed necessary. While the Fund is so positioned, derivatives could comprise a substantial portion of the Fund’s investments and the Fund may not achieve its investment objective. Investing in this manner may adversely affect Fund performance. During these times, the portfolio managers may make frequent portfolio holding changes, which could result in increased trading expenses and taxes, and decreased Fund performance. For information on the risks of investing in derivatives, see Transactions in Derivatives above.

Portfolio Holdings Disclosure

The Board has adopted policies and procedures that govern the timing and circumstances of disclosure to shareholders and third parties of information regarding the securities owned by the Fund. A description of these policies and procedures is included in the SAI. Fund policy generally permits the disclosure of portfolio holdings information on the Fund's website (columbiamanagement.com) only after a certain amount of time has passed, as described in the SAI.

Purchases and sales of portfolio securities can take place at any time, so the portfolio holdings information available on the Fund's website may not always be current.

FUNDamentals

Portfolio Holdings Versus the Benchmarks

The Fund does not limit its investments to the securities within its benchmark(s), and accordingly the Fund's holdings may diverge significantly from those of the benchmark(s). In addition, the Fund may invest in securities outside the industry and geographic sectors represented in its benchmark(s). The Fund's weightings in individual securities, and in industry and geographic sectors, may also vary considerably from those of its benchmark(s).

Mailings to Households

In order to reduce shareholder expenses, the Fund may, if prior consent has been provided, mail only one copy of the Fund’s prospectus and each annual and semiannual report to those addresses shared by two or more accounts. If you wish to receive separate copies of these documents, call 800.345.6611 or, if your shares are held through a financial intermediary, contact your intermediary directly.

Cash Flows

The timing and magnitude of cash inflows from investors buying Fund shares could prevent the Fund from always being fully invested. Conversely, the timing and magnitude of cash outflows to shareholders redeeming Fund shares could require the Fund to sell portfolio securities at less than opportune times or to hold ready reserves of uninvested cash in amounts larger than might otherwise be the case to meet shareholder redemptions. Either situation could adversely impact the Fund’s performance.

Understanding Annual Fund Operating Expenses

The Fund’s annual operating expenses, presented in the Annual Fund Operating Expenses table in the Fees and Expenses of the Fund section of this prospectus, generally are based on estimated expenses for the Fund’s current fiscal period and are expressed as a percentage (expense ratio) of the Fund’s average net assets. The expense ratios reflect current fee arrangements. In general, the Fund’s expense ratios will increase as its net assets decrease, such that the Fund’s actual expense ratios may be higher than the expense ratios presented in the Annual Fund Operating Expenses table.

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More Information About the Fund (continued)

FUNDamentals

Other Expenses

“Other expenses” consist of the fees the Fund pays to its administrator, custodian, transfer agent, auditors, lawyers and trustees, costs relating to compliance and miscellaneous expenses. Generally, these expenses are the same for each share class and are allocated on a pro rata basis across all share classes. Transfer agent fees and certain shareholder servicing fees, however, are class specific. They differ by share class because the shareholder services provided to each share class may be different. Accordingly, the differences in “Other expenses” among share classes are primarily the result of the different transfer agent and shareholder servicing fees applicable to each share class. For more information on these fees, see Choosing a Share Class — Selling Agent Compensation.

Expense Reimbursement Arrangements

The Investment Manager and certain of its affiliates have contractually agreed to waive fees and/or reimburse expenses (excluding certain fees and expenses described below) through May 31, 2015, unless sooner terminated at the sole discretion of the Fund's Board, so that the Fund’s net operating expenses, after giving effect to fees waived/expenses reimbursed and any balance credits and/or overdraft charges from the Fund’s custodian, do not exceed the annual rates of:

Columbia Diversified Real Return Fund
Class A	0.70%
Class C	1.45%
Class R4	0.45%
Class R5	0.35%
Class Z	0.45%

Under the agreement, the following fees and expenses are excluded from the Fund’s operating expenses when calculating the waiver/reimbursement commitment, and therefore will be paid by the Fund, if applicable: taxes (including foreign transaction taxes), expenses associated with investment in affiliated and non-affiliated pooled investment vehicles (including mutual funds and exchange-traded funds), transaction costs and brokerage commissions, costs related to any securities lending program, dividend expenses associated with securities sold short, inverse floater program fees and expenses, transaction charges and interest on borrowed money, interest, extraordinary expenses and any other expenses the exclusion of which is specifically approved by the Board. This agreement may be modified or amended only with approval from all parties.

Primary Service Providers

The Investment Manager, which is also the Fund’s administrator (Administrator), the Distributor and the Transfer Agent are all affiliates of Ameriprise Financial, Inc. (Ameriprise Financial). They and their affiliates currently provide key services, including investment advisory, administration, distribution, shareholder servicing and transfer agency services, to the Fund and various other funds, including Columbia Funds, and are paid for providing these services. These service relationships are described below.

The Investment Manager

Columbia Management Investment Advisers, LLC is located at 225 Franklin Street, Boston, MA 02110 and serves as investment adviser to the Columbia Funds. The Investment Manager is a registered investment adviser and a wholly-owned subsidiary of Ameriprise Financial. The Investment Manager’s management experience covers all major asset classes, including equity securities, fixed-income securities and money market instruments. In addition to serving as an investment adviser to traditional mutual funds, exchange-traded funds and closed-end funds, the Investment Manager acts as an investment adviser for itself, its affiliates, individuals, corporations, retirement plans, private investment companies and financial intermediaries.

Subject to oversight by the Board, the Investment Manager manages the day-to-day operations of the Fund, determines what securities and other investments the Fund should buy or sell and executes the portfolio transactions. The Investment Manager may use the research and other capabilities of its affiliates and third parties in managing investments.

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Columbia Diversified Real Return Fund

More Information About the Fund (continued)

The SEC has issued an order that permits the Investment Manager, subject to the approval of the Board, to appoint an unaffiliated subadviser or to change the terms of a subadvisory agreement for the Fund without first obtaining shareholder approval. The order permits the Fund to add or to change unaffiliated subadvisers or to change the fees paid to subadvisers from time to time without the expense and delays associated with obtaining shareholder approval of the change. The Investment Manager and its affiliates may have other relationships, including significant financial relationships, with current or potential subadvisers or their affiliates, which may create certain conflicts of interest. When making recommendations to the Board to appoint or to change a subadviser, or to change the terms of a subadvisory agreement, the Investment Manager does not consider any other relationship it or its affiliates may have with a subadviser, and the Investment Manager discloses to the Board the nature of any material relationships it has with a subadviser or its affiliates. At present, the Investment Manager has not engaged any investment subadviser for the Fund.

With respect to the Fund, the Fund’s Board of Trustees has approved a subadvisory agreement between the Investment Manager and Threadneedle International Limited (Threadneedle), an affiliate of the Investment Manager and an indirect wholly-owned subsidiary of Ameriprise Financial. At present, Threadneedle is not providing services to the Fund pursuant to the subadvisory agreement.

The Investment Manager has implemented a schedule for the Fund’s investment advisory fees whereby the Fund pays (i) an advisory fee of 0.00% on its assets that are invested in affiliated funds, exchange-traded funds and closed-end funds that pay an investment management services fee to the Investment Manager; and (ii) an advisory fee of 0.70% on its assets that are invested in securities, instruments and other assets not describe above, including without limitation affiliated mutual funds, exchange-traded funds and closed-end funds that do not pay an investment management services fee to the Investment Manager, third party closed-end funds, derivatives and individual securities.

The Fund pays the Investment Manager a fee for its investment advisory services. The fee is calculated as a percentage of the average daily net assets of the Fund and is paid monthly. Under the investment management services agreement, the Fund also pays its taxes, brokerage commissions and nonadvisory expenses. A discussion regarding the basis for the Board approving the adoption of the investment management services agreement will be available in the Fund’s semiannual report to shareholders for the fiscal period ended July 31, 2014.

Portfolio Managers

Information about the Fund’s portfolio managers primarily responsible for overseeing the Fund’s investments is shown below. The SAI provides additional information about the portfolio managers, including information relating to compensation, other accounts managed by the portfolio managers and ownership by the portfolio managers of Fund shares.

Portfolio Manager	Title	Role with Fund	Managed Fund Since
Jeffrey Knight, CFA	Managing Director and Head of Global Asset Allocation	Co-manager	March 2014
Orhan Imer, Ph.D., CFA	Portfolio Manager	Co-manager	March 2014

Mr. Knight joined the Investment Manager in February 2013 as Head of Global Asset Allocation. Prior to joining the Investment Manager, Mr. Knight was at Putnam Investments. Mr. Knight began his investment career in 1987 and earned a B.A. from Colgate University and an M.B.A. from Tuck School of Business.

Dr. Imer joined the Investment Manager in May 2010 when it acquired the long-term asset management business of Columbia Management Group, where he worked as an investment professional since 2009. From 2007 to 2009, Dr. Imer was a senior quantitative strategist for the Investment Strategies Group at Bank of America/Merrill Lynch. Prior to joining Bank of America, Dr. Imer was a senior financial engineer at Algorithmics Inc. and a researcher at General Electric's Global Research Center. Dr. Imer began his investment career in 2005 and earned a Ph.D. from the University of Illinois at Urbana-Champaign.

The Administrator

Columbia Management Investment Advisers, LLC is responsible for overseeing the administrative operations of the Fund, including the general supervision of the Fund’s operations, the coordination of the Fund’s service providers and the provision of related clerical and administrative services. The Fund pays the Administrator a fee (plus certain out-of-pocket expenses) for the administrative services it provides to the Fund.

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The Distributor

Shares of the Fund are distributed by Columbia Management Investment Distributors, Inc. The Distributor is a registered broker-dealer and an indirect, wholly-owned subsidiary of Ameriprise Financial. The Distributor and its affiliates may pay commissions, distribution and service fees and/or other compensation to entities, including Ameriprise Financial affiliates, for selling shares and providing services to investors.

The Transfer Agent

Columbia Management Investment Services Corp. is a registered transfer agent and wholly-owned subsidiary of Ameriprise Financial. The Transfer Agent is located at 225 Franklin Street, Boston, MA 02110, and its responsibilities include processing purchases, redemptions and exchanges of Fund shares, calculating and paying distributions, maintaining shareholder records, preparing account statements and providing customer service. The Transfer Agent has engaged DST Systems, Inc., including its affiliate, Boston Financial Data Services, as the Fund’s sub-transfer agent to provide certain shareholder services. In addition, the Transfer Agent enters into agreements with various financial intermediaries through which you may hold Fund shares, pursuant to which the Transfer Agent pays these financial intermediaries for providing certain shareholder services. The Fund generally pays the Transfer Agent a per account fee for each account held directly with the Transfer Agent, pays a fee based on the assets invested through omnibus accounts and reimburses the Transfer Agent for certain out-of-pocket expenses.

Other Roles and Relationships of Ameriprise Financial and its Affiliates — Certain Conflicts of Interest

The Investment Manager, Distributor and Transfer Agent, all affiliates of Ameriprise Financial, provide various services to the Fund and other Columbia Funds for which they are compensated. Ameriprise Financial and its other affiliates may also provide other services to these funds and be compensated for them.

The Investment Manager and its affiliates may provide investment advisory and other services to other clients and customers substantially similar to those provided to the Columbia Funds. These activities, and other financial services activities of Ameriprise Financial and its affiliates, may present actual and potential conflicts of interest and introduce certain investment constraints.

Ameriprise Financial is a major financial services company, engaged in a broad range of financial activities beyond the mutual fund-related activities of the Investment Manager, including, among others, insurance, broker-dealer (sales and trading), asset management, banking and other financial activities. These additional activities may involve multiple advisory, financial, insurance and other interests in securities and other instruments, and in companies that issue securities and other instruments, that may be bought, sold or held by the Columbia Funds.

Conflicts of interest and limitations that could affect a Columbia Fund may arise from, for example, the following:

■	compensation and other benefits received by the Investment Manager and other Ameriprise Financial affiliates related to the management/administration of a Columbia Fund and the sale of its shares;
■	the allocation of, and competition for, investment opportunities among the Fund, other funds and accounts advised/managed by the Investment Manager and other Ameriprise Financial affiliates, or Ameriprise Financial itself and its affiliates;
■	separate and potentially divergent management of a Columbia Fund and other funds and accounts advised/managed by the Investment Manager and other Ameriprise Financial affiliates;
■	regulatory and other investment restrictions on investment activities of the Investment Manager and other Ameriprise Financial affiliates and accounts advised/managed by them;
■	insurance and other relationships of Ameriprise Financial affiliates with companies and other entities in which a Columbia Fund invests; and
■	regulatory and other restrictions relating to the sharing of information between Ameriprise Financial and its affiliates, including the Investment Manager, and a Columbia Fund.

The Investment Manager and Ameriprise Financial have adopted various policies and procedures that are intended to identify, monitor and address conflicts of interest. However, there is no assurance that these policies, procedures and disclosures will be effective.

Prospectus 2014

Columbia Diversified Real Return Fund

More Information About the Fund (continued)

Additional information about Ameriprise Financial and the types of conflicts of interest and other matters referenced above are set forth in the Investment Management and Other Services — Other Roles and Relationships of Ameriprise Financial and its Affiliates — Certain Conflicts of Interest section of the SAI. Investors in the Columbia Funds should carefully review these disclosures and consult with their financial advisor if they have any questions.

Certain Legal Matters

Ameriprise Financial and certain of its affiliates have historically been involved in a number of legal, arbitration and regulatory proceedings, including routine litigation, class actions and governmental actions, concerning matters arising in connection with the conduct of their business activities. Ameriprise Financial believes that the Fund is not currently the subject of, and that neither Ameriprise Financial nor any of its affiliates are the subject of, any pending legal, arbitration or regulatory proceedings that are likely to have a material adverse effect on the Fund or the ability of Ameriprise Financial or its affiliates to perform under their contracts with the Fund. Information regarding certain pending and settled legal proceedings may be found in the Fund’s shareholder reports and in the SAI. Additionally, Ameriprise Financial is required to make 10-Q, 10-K and, as necessary, 8-K filings with the SEC on legal and regulatory matters that relate to Ameriprise Financial and its affiliates. Copies of these filings may be obtained by accessing the SEC website at sec.gov.

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Columbia Diversified Real Return Fund

Choosing a Share Class

The Funds

The Columbia Funds generally share the same policies and procedures for investor services, as described below. Funds and portfolios that used the “Columbia” and “Columbia Acorn” brands prior to September 27, 2010 are collectively referred to herein as the Legacy Columbia Funds. The funds that historically used the RiverSource brand, including those renamed with the “Columbia” brand effective September 27, 2010, as well as certain other funds are collectively referred to as the Legacy RiverSource Funds. Together the Legacy Columbia Funds and the Legacy RiverSource Funds are referred to as the Funds. For a list of Legacy Columbia Funds and Legacy RiverSource Funds, see the appendices to a Fund's SAI.

Funds Contact Information

Additional information about the Funds can be obtained at columbiamanagement.com,* by calling toll-free 800.345.6611, or by writing (regular mail) to Columbia Management Investment Services Corp., P.O. Box 8081, Boston, MA 02266-8081 or (express mail) Columbia Management Investment Services Corp., c/o Boston Financial, 30 Dan Road, Suite 8081, Canton, MA 02021-2809.

*	The website references in this prospectus are intended to be inactive textual references and information contained in or otherwise accessible through the referenced websites does not form a part of this prospectus.

FUNDamentals

Selling and/or Servicing Agents

The terms “selling agent” and “servicing agent” refer to the financial intermediaries that are authorized to sell shares of the Funds. Selling and/or servicing agents (collectively, selling agents) include broker-dealers and financial advisors as well as firms that employ such broker-dealers and financial advisors, including, for example, brokerage firms, banks, investment advisors, third party administrators and other financial intermediaries, including Ameriprise Financial and its affiliates.

Omnibus Accounts

The term “omnibus account” refers to an account with the Fund or the Transfer Agent for a selling agent in which the holdings of Fund shares and transactions in Fund shares of two or more persons are combined and held in the name of the selling agent and not in the name of the actual persons investing in the Fund.

Retirement Plans and Omnibus Retirement Plans

The term “retirement plan” refers to retirement plans created under sections 401(a), 401(k), 457 and 403(b) of the Internal Revenue Code of 1986, as amended (the Code), non-qualified deferred compensation plans governed by section 409A of the Code and similar plans, but does not refer to individual retirement plans. The term “omnibus retirement plan” refers to a retirement plan that has a plan-level or omnibus account with the Transfer Agent.

Summary of Share Class Features

Each share class has its own investment eligibility criteria, cost structure and other features. You may not be eligible for every share class. If you purchase shares of a Fund through a retirement plan or other product or program offered by your selling agent, not all share classes of the Fund may be made available to you. When deciding which class of shares to buy, you should consider, among other things:

■	The amount you plan to invest.
■	How long you intend to remain invested in the Fund.
■	The expenses for each share class.
■	Whether you may be eligible for a reduction or waiver of sales charges when you buy or sell shares.

Each investor's personal situation is different and you may wish to discuss with your selling agent which share classes are available to you and which share class is appropriate for you.

Prospectus 2014

Columbia Diversified Real Return Fund

Choosing a Share Class (continued)

The following summarizes the primary features of Class A, Class B, Class C, Class I, Class K, Class R, Class R4, Class R5, Class T, Class W, Class Y and Class Z shares.

Not all Funds offer every class of shares. The Fund offers the class(es) of shares set forth on the cover of this prospectus and may offer other share classes through a separate prospectus. Although certain share classes are generally closed to new or existing investors, information relating to these share classes is included in the table below because certain qualifying purchase orders are permitted, as described below.

Share Class Features

Share Class	Eligible Investors^(a); Minimum Initial Investments^(b); Investment Limits; and Conversion Features	Front-End Sales Charges^(c)	Contingent Deferred Sales Charges (CDSCs)^(c)	Maximum Distribution and/or Service Fees^(d)
Class A	Eligibility: Available to the general public for investment Minimum Initial Investment: $2,000 for most investors Investment Limit and Conversion Features: None	5.75% maximum, declining to 0.00% on investments of $1 million or more None for Columbia Money Market Fund and certain other Funds^(e)	CDSC on certain investments of between $1 million and $50 million redeemed within 18 months of purchase charged as follows: • 1.00% CDSC if redeemed within 12 months of purchase and • 0.50% CDSC if redeemed more than 12, but less than 18, months after purchase^(e)	Distribution and Service Fees: up to 0.25%
Class B	Eligibility: Closed to new investors^(f) Investment Limit: Up to $49,999 Conversion Features: Converts to Class A shares generally eight years after purchase^(g)	None	5.00% maximum, gradually declining to 0.00% after six years^(g)	Distribution Fee: 0.75% Service Fee: 0.25%
Class C	Eligibility: Available to the general public for investment Minimum Initial Investment: $2,000 for most investors Investment Limit: Up to $999,999; none for omnibus retirement plans Conversion Features: None	None	1.00% on certain investments redeemed within one year of purchase	Distribution Fee: 0.75% Service Fee: 0.25%
Class I	Eligibility: Available only to other Funds (i.e., fund-of-fund investments) Minimum Initial Investment, Investment Limit and Conversion Features: None	None	None	None

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Choosing a Share Class (continued)

Share Class	Eligible Investors^(a); Minimum Initial Investments^(b); Investment Limits; and Conversion Features	Front-End Sales Charges^(c)	Contingent Deferred Sales Charges (CDSCs)^(c)	Maximum Distribution and/or Service Fees^(d)
Class K	Eligibility: Closed to new investors; available only to qualified employee benefit plans, trust companies or similar institutions, 501(c)(3) charitable organizations, non-qualified deferred compensation plans whose participants are included in a qualified employee benefit plan described above, 529 plans, and health savings accounts^(f) Minimum Initial Investment, Investment Limit and Conversion Features: None	None	None	Plan Administration Services Fee: 0.25%
Class R	Eligibility: Available only to eligible retirement plans, health savings accounts and, in the sole discretion of the Distributor, other types of retirement accounts held through platforms maintained by selling agents approved by the Distributor Minimum Initial Investment, Investment Limit and Conversion Features: None	None	None	Legacy Columbia Funds: distribution fee of 0.50% Legacy RiverSource Funds: distribution and service fee of 0.50%, of which the service fee may be up to 0.25%
Class R4	Eligibility: Available only to (i) omnibus retirement plans, (ii) trust companies or similar institutions, (iii) broker-dealers, banks, trust companies and similar institutions that clear Fund share transactions for their client or customer investment advisory or similar accounts through designated selling agents and their mutual fund trading platforms that have been granted specific written authorization from the Transfer Agent with respect to Class R4 eligibility apart from selling, servicing or similar agreements, (iv) 501(c)(3) charitable organizations, (v) 529 plans and (vi) health savings accounts Minimum Initial Investment, Investment Limit and Conversion Features: None	None	None	None

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Columbia Diversified Real Return Fund

Choosing a Share Class (continued)

Share Class	Eligible Investors^(a); Minimum Initial Investments^(b); Investment Limits; and Conversion Features	Front-End Sales Charges^(c)	Contingent Deferred Sales Charges (CDSCs)^(c)	Maximum Distribution and/or Service Fees^(d)
Class R5	Eligibility: Available only to (i) certain registered investment advisers that clear Fund share transactions for their client or customer accounts through designated selling agents and their mutual fund trading platforms that have been granted specific written authorization from the Transfer Agent with respect to Class R5 eligibility apart from selling, servicing or similar agreements and (ii) omnibus retirement plans^(f) Minimum Initial Investment: None for omnibus retirement plans; $100,000 for combined underlying accounts of eligible registered investment advisers Investment Limit and Conversion Features: None	None	None	None
Class T	Eligibility: Generally closed to new investors; available only to investors who received (and who have continuously held) Class T shares in connection with the merger of certain Galaxy funds into various Legacy Columbia Funds (formerly named Liberty funds) Minimum Initial Investment, Investment Limit and Conversion Features: None	5.75% maximum, declining to 0.00% on investments of $1 million or more	CDSC on certain investments of between $1 million and $50 million redeemed within 18 months of purchase, charged as follows: • 1.00% CDSC if redeemed within 12 months of purchase and • 0.50% CDSC if redeemed more than 12, but less than 18, months after purchase	Service Fee: up to 0.50%
Class W	Eligibility: Available only to investors purchasing through certain authorized investment programs managed by investment professionals, including discretionary managed account programs Minimum Initial Investment: $500 Investment Limit and Conversion Features: None	None	None	Distribution and Service Fees: 0.25%

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Choosing a Share Class (continued)

Share Class	Eligible Investors^(a); Minimum Initial Investments^(b); Investment Limits; and Conversion Features	Front-End Sales Charges^(c)	Contingent Deferred Sales Charges (CDSCs)^(c)	Maximum Distribution and/or Service Fees^(d)
Class Y	Eligibility: Available only to (i) omnibus retirement plans with plan assets of at least $10 million as of the date of funding the Fund account (without a minimum initial investment amount); and (ii) omnibus retirement plans with plan assets of less than $10 million as of the date of funding the Fund account, provided that such plans invest $500,000 or more in Class Y shares of the Fund^(f) Minimum Initial Investment: See Eligibility above Investment Limit and Conversion Features: None	None	None	None
Class Z	Eligibility: Available only to certain eligible investors, which are subject to different minimum investment requirements, ranging from $0 to $2,000; effective March 29, 2013, closed to (i) accounts of selling agents that clear Fund share transactions for their client or customer accounts through designated selling agents and their mutual fund trading platforms that have been given specific written notice from the Transfer Agent of the termination of their eligibility for new purchases of Class Z shares and (ii) omnibus retirement plans, subject to certain exceptions^(f) Minimum Initial Investment: See Eligibility above Investment Limit and Conversion Features: None	None	None	None

(a)	For Columbia Money Market Fund, new investments must be made in Class A, Class I, Class W or Class Z shares, subject to eligibility. Class C and Class R shares of Columbia Money Market Fund are available as a new investment only to investors in the Distributor's proprietary 401(k) products, provided that such investor is eligible to invest in the class and transact directly with the Fund or the Transfer Agent through a third party administrator or third party recordkeeper. Columbia Money Market Fund offers other classes of shares only to facilitate exchanges with other Funds offering such share classes.
(b)	The minimum initial investment requirement is $5,000 for Columbia Floating Rate Fund and Columbia Inflation Protected Securities Fund, and $10,000 for Columbia Absolute Return Currency and Income Fund and Columbia Absolute Return Emerging Markets Macro Fund. See Buying, Selling and Exchanging Shares — Buying Shares for more details on the eligible investors and minimum initial investment requirements. Certain share classes are subject to minimum account balance requirements, as described in Buying, Selling and Exchanging Shares — Transaction Rules and Policies.
(c)	Actual front-end sales charges and CDSCs vary among the Funds. For more information on applicable sales charges, see Choosing a Share Class — Sales Charges and Commissions and for information about certain exceptions to these sales charges, see Choosing a Share Class — Reductions/Waivers of Sales Charges.
(d)	These are the maximum applicable distribution and/or service fees. Fee rates and fee components (i.e., the portion of a combined fee that is a distribution or service fee) may vary among Funds. Because these fees are paid out of Fund assets on an ongoing basis, over time these fees

Prospectus 2014

Columbia Diversified Real Return Fund

Choosing a Share Class (continued)

	will increase the cost of your investment and may cost you more than paying other types of distribution and/or shareholder service fees. Although Class A shares of certain Legacy Columbia Funds are subject to a combined distribution and service fee of up to 0.35%, these Funds currently limit the combined fee to 0.25%. Columbia Money Market Fund pays a distribution and service fee of up to 0.10% on Class A shares, up to 0.75% distribution fee and up to 0.10% service fee on Class B shares, up to 0.75% distribution fee on Class C shares, and 0.10% distribution and service fees on Class W shares. Columbia High Yield Municipal Fund, Columbia Intermediate Municipal Bond Fund and Columbia Tax-Exempt Fund pay a service fee of up to 0.20% on Class A, Class B and Class C shares. Columbia Intermediate Municipal Bond Fund pays a distribution fee of up to 0.65% on Class B and Class C shares. For more information on distribution and service fees, see Choosing a Share Class — Distribution and Service Fees.
(e)	The following Funds are not subject to a front-end sales charge or a CDSC on Class A shares: Columbia Money Market Fund, Columbia Large Cap Index Fund, Columbia Large Cap Enhanced Core Fund, Columbia Mid Cap Index Fund and Columbia Small Cap Index Fund. Columbia U.S. Treasury Index Fund is not subject to a CDSC.
(f)	These share classes are closed to new accounts, or closed to previously eligible investors, subject to certain conditions, as summarized below and described in more detail under Buying, Selling and Exchanging Shares — Buying Shares — Eligible Investors:

• Class B Shares. The Funds no longer accept investments from new or existing investors in Class B shares, except through reinvestment of dividend and/or capital gain distributions by existing Class B shareholders, or a permitted exchange.

• Class K Shares. Shareholders who opened and funded a Class K account with a Fund as of the close of business on December 31, 2010 may continue to make additional purchases of such share class, and existing Class K accounts may continue to allow new investors or participants to be established in their Fund account.

• Class R5 Shares. Shareholders with Class R5 accounts funded before November 8, 2012 who do not satisfy the current eligibility criteria for Class R5 shares may not establish new Class R5 accounts but may continue to make additional purchases of Class R5 shares in existing accounts. In addition, investment advisory programs and similar programs that opened a Class R5 account as of May 1, 2010 and continuously hold Class R5 shares in such account after such date, may generally not only continue to make additional purchases of Class R5 shares but also open new Class R5 accounts for such pre-existing programs and add new shareholders in the program.

• Class Y Shares. Shareholders with Class Y accounts funded before November 8, 2012 who do not satisfy the current eligibility criteria for Class Y shares may not establish new accounts for such share class but may continue to make additional purchases of Class Y shares in existing accounts.

• Class Z Shares. Effective March 29, 2013, selling agents that clear Fund share transactions through designated selling agents and their mutual fund trading platforms that have been given specific written notice from the Transfer Agent of the termination of their eligibility for new purchases of Class Z shares and omnibus retirement plans are no longer permitted to establish new Class Z accounts, subject to certain exceptions. Omnibus retirement plans that opened and, subject to exceptions, funded a Class Z account as of close of business on March 28, 2013 and continuously hold Class Z shares in such account after such date, may generally continue to make additional purchases of Class Z shares, open new Class Z accounts and add new participants. In certain circumstances and in the sole discretion of the Distributor, omnibus retirement plans affiliated with a grandfathered plan may also open new Class Z accounts. Accounts of selling agents (other than omnibus retirement plans) that clear Fund share transactions for their client or customer accounts through designated selling agents and their mutual fund trading platforms are not permitted to establish new Class Z accounts or make additional purchases of Class Z shares (other than through reinvestment of distributions).

(g)

Timing of conversion and CDSC schedules will vary depending on the Fund and the date of your original purchase of Class B shares. For more information on the conversion of Class B shares to Class A shares, see Choosing a Share Class — Sales Charges and Commissions. Class B shares of Columbia Short Term Municipal Bond Fund do not charge a CDSC and do not convert to Class A shares.

Sales Charges and Commissions

Sales charges, commissions and distribution and service fees (discussed in a separate sub-section below) compensate selling agents (typically your financial advisor) for selling shares to you and for maintaining and servicing the shares held in your account with them. These charges, commissions and fees are intended to provide incentives for selling agents to provide these services. Depending on which share class you choose you will pay these charges either at the outset as a front-end sales charge, at the time you sell your shares as a CDSC and/or over time in the form of increased ongoing fees.

Whether the ultimate cost is higher for one class over another depends on the amount you invest, how long you hold your shares and whether you are eligible for reduced or waived sales charges. The differential between classes also will vary depending on the actual investment return for any given investment period. We encourage you to consult with a financial advisor who can help you with your investment decisions.

Class A Shares — Front-End Sales Charge

You'll pay a front-end sales charge when you buy Class A shares (other than shares of Columbia Money Market Fund and certain other Funds), resulting in a smaller dollar amount being invested in a Fund than the purchase price you pay, unless you qualify for a waiver of the sales charge or you buy the shares through reinvested distributions. For more information, see Choosing a Share Class — Reductions/Waivers of Sales Charges.

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Choosing a Share Class (continued)

The Distributor receives the sales charge and re-allows (or pays) a portion of the sales charge to the selling agent through which you purchased the shares. The Distributor retains the balance of the sales charge. The Distributor retains the full sales charge you pay when you purchase shares of the Fund directly from the Fund (rather than through a selling agent). Sales charges vary depending on the amount of your purchase.

FUNDamentals

Front-End Sales Charge Calculation

The table below presents the front-end sales charge as a percentage of both the offering price and the net amount invested.

■	The net asset value (or NAV) per share is the price of a share calculated by the Fund every business day.
■	The offering price per share is the NAV per share plus any front-end sales charge that applies.

The dollar amount of the sales charge is the difference between the offering price of the shares you buy (based on the applicable sales charge for the Fund) and the net asset value of those shares. To determine the front-end sales charge you will pay when you buy your shares, the Fund will add the amount of your investment to the value of your account (and any other accounts eligible for aggregation of which you or your selling agent notifies the Fund) and base the sales charge on the aggregate amount. See Choosing a Share Class — Reductions/Waivers of Sales Charges for a discussion of account value aggregation. There is no initial sales charge on reinvested dividend or capital gain distributions.

The front-end sales charge you'll pay on Class A shares:

■	depends on the amount you're investing (generally, the larger the investment, the smaller the percentage sales charge), and
■	is based on the total amount of your purchase and the value of your account (and any other accounts eligible for aggregation of which you or your selling agent notifies the Fund).

Class A Shares — Front-End Sales Charge — Breakpoint Schedule*
Breakpoint Schedule For:	Dollar amount of shares bought^(a)	Sales charge as a % of the offering price^(b)	Sales charge as a % of the net amount invested^(b)	Amount retained by or paid to selling agents as a % of the offering price
Equity Funds, Columbia Absolute Return Emerging Markets Macro Fund, Columbia Absolute Return Enhanced Multi-Strategy Fund, Columbia Commodity Strategy Fund, Columbia Risk Allocation Fund and Funds-of-Funds (equity)*	$ 0–$49,999	5.75%	6.10%	5.00%
	$ 50,000–$99,999	4.50%	4.71%	3.75%
	$100,000–$249,999	3.50%	3.63%	3.00%
	$250,000–$499,999	2.50%	2.56%	2.15%
	$500,000–$999,999	2.00%	2.04%	1.75%
	$ 1,000,000 or more	0.00%	0.00%	0.00% ^(c)

Fixed Income Funds (except those listed below) and Funds-of-Funds (fixed income)*	$ 0-$49,999	4.75%	4.99%	4.00%
	$ 50,000–$99,999	4.25%	4.44%	3.50%
	$100,000–$249,999	3.50%	3.63%	3.00%
	$250,000–$499,999	2.50%	2.56%	2.15%
	$500,000–$999,999	2.00%	2.04%	1.75%
	$ 1,000,000 or more	0.00%	0.00%	0.00% ^(c)

Prospectus 2014

Columbia Diversified Real Return Fund

Choosing a Share Class (continued)

Class A Shares — Front-End Sales Charge — Breakpoint Schedule*
Breakpoint Schedule For:	Dollar amount of shares bought^(a)	Sales charge as a % of the offering price^(b)	Sales charge as a % of the net amount invested^(b)	Amount retained by or paid to selling agents as a % of the offering price
Columbia Intermediate Bond Fund, Columbia Intermediate Municipal Bond Fund and each of the state-specific intermediate municipal bond Funds	$ 0-$99,999	3.25%	3.36%	2.75%
	$100,000–$249,999	2.50%	2.56%	2.15%
	$250,000–$499,999	2.00%	2.04%	1.75%
	$500,000–$999,999	1.50%	1.53%	1.25%
	$ 1,000,000 or more	0.00%	0.00%	0.00% ^(c)

Columbia Absolute Return Currency and Income Fund, Columbia Absolute Return Multi-Strategy Fund, Columbia Floating Rate Fund, Columbia Inflation Protected Securities Fund and Columbia Limited Duration Credit Fund	$ 0-$99,999	3.00%	3.09%	2.50%
	$100,000–$249,999	2.50%	2.56%	2.15%
	$250,000–$499,999	2.00%	2.04%	1.75%
	$500,000–$999,999	1.50%	1.52%	1.25%
	$ 1,000,000 or more	0.00%	0.00%	0.00% ^(c)

Columbia Short Term Bond Fund and Columbia Short Term Municipal Bond Fund	$ 0-$99,999	1.00%	1.01%	0.75%
	$100,000–$249,999	0.75%	0.76%	0.50%
	$250,000–$999,999	0.50%	0.50%	0.40%
	$ 1,000,000 or more	0.00%	0.00%	0.00% ^(c)

*	The following Funds are not subject to a front-end sales charge on Class A shares: Columbia Money Market Fund, Columbia Large Cap Index Fund, Columbia Large Cap Enhanced Core Fund, Columbia Mid Cap Index Fund and Columbia Small Cap Index Fund. The following Funds are not subject to a CDSC on Class A shares: Columbia Money Market Fund, Columbia Large Cap Index Fund, Columbia Large Cap Enhanced Core Fund, Columbia Mid Cap Index Fund, Columbia Small Cap Index Fund and Columbia U.S. Treasury Index Fund. "Funds-of-Funds (equity)" includes Columbia Capital Allocation Aggressive Portfolio, Columbia Capital Allocation Moderate Aggressive Portfolio, Columbia Capital Allocation Moderate Conservative Portfolio, Columbia Capital Allocation Moderate Portfolio and Columbia LifeGoal® Growth Portfolio. "Funds-of-Funds (fixed income)" includes Columbia Capital Allocation Conservative Portfolio and Columbia Income Builder Fund. Columbia Balanced Fund and Columbia Global Opportunities Fund are treated as equity Funds for purposes of the table.
(a)	Purchase amounts and account values may be aggregated among all eligible Fund accounts for the purposes of this table. See Choosing a Share Class — Reductions/Waivers of Sales Charges for a discussion of account value aggregation.
(b)	Because the offering price is calculated to two decimal places, the dollar amount of the sales charge as a percentage of the offering price and your net amount invested for any particular purchase of Fund shares may be higher or lower depending on whether downward or upward rounding was required during the calculation process. Purchase price includes the sales charge.
(c)	For information regarding cumulative commissions paid to your selling agent when you buy $1 million or more of Class A shares of a Fund, see Class A Shares — Commissions below.

Class A Shares — CDSC

In some cases, you'll pay a CDSC if you sell Class A shares that you purchased without an initial sales charge.

■

If you purchased Class A shares without an initial sales charge because your accounts aggregated between $1 million and $50 million at the time of purchase, you will incur a CDSC if you redeem those shares within 18 months of purchase, which is charged as follows: 1.00% CDSC if shares are redeemed within 12 months of purchase; and 0.50% CDSC if shares are redeemed more than 12, but less than 18, months after purchase.

■

Subsequent Class A share purchases that bring your aggregate account value to $1 million or more (but less than $50 million) will also be subject to a CDSC if you redeem them within the time periods noted above.

32	Prospectus 2014

Columbia Diversified Real Return Fund

Choosing a Share Class (continued)

FUNDamentals

Contingent Deferred Sales Charge

A contingent deferred sales charge or CDSC is a sales charge applied at the time you sell your shares, unlike a front-end sales charge that is applied at the time of purchase. A CDSC varies based on the length of time that you have held your shares. A CDSC is applied to the NAV at the time of your purchase or sale, whichever is lower, and will not be applied to any shares you receive through reinvested distributions or any amount that represents appreciation in the value of your shares. For purposes of calculating a CDSC, the start of the holding period is generally the first day of the month in which your purchase was made.

When you place an order to sell shares of a class that has a CDSC, the Fund will first redeem any shares that aren't subject to a CDSC, followed by those you have held the longest. This means that if a CDSC is imposed, you cannot designate the individual shares being redeemed for U.S. federal income tax purposes. You should consult your tax advisor about the tax consequences of investing in the Fund. In certain circumstances, the CDSC may not apply. See Choosing a Share Class — Reductions/Waivers of Sales Charges for details.

Class A Shares — Commissions

The Distributor may pay your selling agent an up-front commission when you buy Class A shares. The Distributor generally funds the commission through the applicable sales charge paid by you. For more information, see Class A Shares — Front-End Sales Charge — Breakpoint Schedule, Amount retained by or paid to selling agents as a % of the offering price.

The Distributor may also pay your selling agent a cumulative commission when you buy $1 million or more of Class A shares, according to the following schedule:

Class A Shares — Commission Schedule (Paid by the Distributor to Selling Agents)*
Purchase Amount	Commission Level (as a % of net asset value per share)
$1 million – $2,999,999	1.00%
$3 million – $49,999,999	0.50%
$50 million or more	0.25%

*	Not applicable to Funds that do not assess a front-end sales charge. In addition, the Distributor does not make such payments on purchases of $1 million or more of Columbia U.S. Treasury Index Fund.

Class B Shares — Sales Charges

The Funds no longer accept new investments in Class B shares, except for certain limited transactions as described in more detail under Buying, Selling and Exchanging Shares — Buying Shares — Eligible Investors — Class B Shares (Closed).

You don't pay a front-end sales charge when you buy Class B shares, but you may pay a CDSC when you sell Class B shares.

Prospectus 2014

Columbia Diversified Real Return Fund

Choosing a Share Class (continued)

Class B Shares — CDSC

You'll pay a CDSC if you sell Class B shares unless you qualify for a waiver of the CDSC or the shares you're selling were bought through reinvested distributions. See Choosing a Share Class — Reductions/Waivers of Sales Charges for details. The CDSC you pay on Class B shares depends on how long you've held your shares and generally declines each year until there is no sales charge, as follows:

Class B Shares — CDSC Schedule for the Funds (except those listed below)
Number of Years Class B Shares Held	Applicable CDSC*
One	5.00%
Two	4.00%
Three	3.00%
Four	3.00%
Five	2.00%
Six	1.00%
Seven	None
Eight	None
Nine	Conversion to Class A Shares

*	Because of rounding in the calculation, the actual CDSC you pay may be more or less than the CDSC calculated using these percentages.

Class B Shares — CDSC Schedule for Columbia Intermediate Bond Fund, Columbia Intermediate Municipal Bond Fund, Columbia Short Term Bond Fund and the State-specific Intermediate Municipal Bond Funds
Number of Years Class B Shares Held	Applicable CDSC*
One	3.00%
Two	3.00%
Three	2.00%
Four	1.00%
Five	None
Six	None
Seven	None
Eight	None
Nine	Conversion to Class A Shares

*	Because of rounding in the calculation, the actual CDSC you pay may be more or less than the CDSC calculated using these percentages.

Class B shares of Columbia Short Term Municipal Bond Fund are not subject to a CDSC.

Class B Shares — Commissions

The Distributor paid an up-front commission directly to your selling agent when you bought the Class B shares (a portion of this commission may have been paid to your financial advisor).

This up-front commission, which varies across the Funds, was up to 4.00% of the net asset value per share of Funds with a maximum CDSC of 5.00% and of Class B shares of Columbia Short Term Municipal Bond Fund and up to 2.75% of the net asset value per share of Funds with a maximum CDSC of 3.00%. The Distributor continues to seek to recover this commission through distribution fees it receives under the Fund's distribution plan and any applicable CDSC paid when you sell your shares. For more information, see Choosing a Share Class — Distribution and Service Fees.

34	Prospectus 2014

Columbia Diversified Real Return Fund

Choosing a Share Class (continued)

Class B Shares — Conversion to Class A Shares

Class B shares of the Funds automatically convert to Class A shares at different times depending upon the Fund. In general, Class B shares convert to Class A shares after eight years. For details and related information about how the Funds' Class B shares convert to Class A shares, see Appendix S to the SAI. Class B shares of Columbia Short Term Municipal Bond Fund do not convert to Class A shares.

Class C Shares — Front-End Sales Charge

You don't pay a front-end sales charge when you buy Class C shares. Although Class C shares do not have a front-end sales charge such that the full amount of your purchase price is invested in a Fund, over time Class C shares can incur distribution (12b-1) and/or shareholder servicing fees that are equal to or more than the front-end sales charge and distribution (12b-1) and/or shareholder servicing fees you would pay for Class A shares. Thus, although the full amount of your purchase of Class C shares is invested in a Fund, any positive investment return on this money may be partially or fully offset by the expected higher annual expenses of Class C shares.

Class C Shares — CDSC

You'll pay a CDSC of 1.00% if you redeem Class C shares within 12 months of buying them unless you qualify for a waiver of the CDSC or the shares you're selling were purchased through reinvested distributions. For more information, see Choosing a Share Class — Reductions/Waivers of Sales Charges. Redemptions of Class C shares are not subject to a CDSC if redeemed after twelve months.

Class C Shares — Commissions

Although there is no front-end sales charge when you buy Class C shares, the Distributor pays an up-front commission directly to your selling agent of up to 1.00% of the net asset value per share when you buy Class C shares (a portion of this commission may be paid to your financial advisor). The Distributor seeks to recover this commission through distribution fees it receives under the Fund's distribution and/or service plan and any applicable CDSC applied when you sell your shares. For more information, see Choosing a Share Class — Distribution and Service Fees.

Class R Shares — Sales Charges and Commissions

You don't pay a front-end sales charge when you buy Class R shares or a CDSC when you sell Class R shares. The Distributor pays an up-front commission directly to your selling agent when you buy Class R shares (a portion of this commission may be paid to your financial advisor), according to the following schedule:

Class R Shares — Commission Schedule (Paid by the Distributor to Selling Agents)
Purchase Amount	Commission Level (as a % of net asset value per share)
$0 – $49,999,999	0.50%
$50 million or more	0.25%

The Distributor seeks to recover this commission through distribution fees it receives under the Fund's distribution plan. For more information, see Choosing a Share Class — Distribution and Service Fees.

Class T Shares — Front-End Sales Charge

You'll pay a front-end sales charge when you buy Class T shares, resulting in a smaller dollar amount being invested in a Fund than the purchase price you pay, unless you qualify for a waiver of the sales charge or you buy the shares through reinvested distributions. For more information, see Choosing a Share Class — Reductions/Waivers of Sales Charges.

The front-end sales charge you'll pay on Class T shares:

■	depends on the amount you're investing (generally, the larger the investment, the smaller the percentage sales charge), and
■	is based on the total amount of your purchase and the value of your account (and any other accounts eligible for aggregation of which you or your selling agent notifies the Fund).

Prospectus 2014

Columbia Diversified Real Return Fund

Choosing a Share Class (continued)

Class T Shares — Front-End Sales Charge — Breakpoint Schedule
Breakpoint Schedule For:	Dollar amount of shares bought^(a)	Sales charge as a % of the offering price^(b)	Sales charge as a % of the net amount invested^(b)	Amount retained by or paid to selling agents as a % of the offering price
Equity Funds	$ 0–$49,999	5.75%	6.10%	5.00%
	$ 50,000–$99,999	4.50%	4.71%	3.75%
	$100,000–$249,999	3.50%	3.63%	2.75%
	$250,000–$499,999	2.50%	2.56%	2.00%
	$500,000–$999,999	2.00%	2.04%	1.75%
	$ 1,000,000 or more	0.00%	0.00%	0.00% ^(c)

Fixed Income Funds	$ 0–$49,999	4.75%	4.99%	4.25%
	$ 50,000–$99,999	4.50%	4.71%	3.75%
	$100,000–$249,999	3.50%	3.63%	2.75%
	$250,000–$499,999	2.50%	2.56%	2.00%
	$500,000–$999,999	2.00%	2.04%	1.75%
	$ 1,000,000 or more	0.00%	0.00%	0.00% ^(c)

(a)	Purchase amounts and account values are aggregated among all eligible Fund accounts for the purposes of this table.
(b)	Because the offering price is calculated to two decimal places, the dollar amount of the sales charge as a percentage of the offering price and your net amount invested for any particular purchase of Fund shares may be higher or lower depending on whether downward or upward rounding was required during the calculation process.
(c)	For more information regarding cumulative commissions paid to your selling agent when you buy $1 million or more of Class T shares, see Class T Shares — Commissions below.

Class T Shares — CDSC

In some cases, you'll pay a CDSC if you sell Class T shares that you bought without an initial sales charge.

■

If you purchased Class T shares without a front-end sales charge because your accounts aggregated between $1 million and $50 million at the time of purchase, you will incur a CDSC if you redeem those shares within 18 months of purchase, which is charged as follows: 1.00% CDSC if shares are redeemed within 12 months of purchase, and 0.50% CDSC if shares are redeemed more than 12, but less than 18, months after purchase.

■

Subsequent Class T share purchases that bring your aggregate account value to $1 million or more (but less than $50 million) will also be subject to a CDSC if you redeem them within the time periods noted above.

Class T Shares — Commissions

The Distributor may pay your selling agent an up-front commission when you buy Class T shares (a portion of this commission may, in turn, be paid to your financial advisor). For more information, see Class T Shares — Front-End Sales Charge — Breakpoint Schedule, Amount retained by or paid to selling agents as a % of the offering price.

The Distributor may also pay your selling agent a cumulative commission when you buy $1 million or more of Class T shares, according to the following schedule:

Class T Shares — Commission Schedule (Paid by the Distributor to Selling Agents)
Purchase Amount	Commission Level (as a % of net asset value per share)
$1 million – $2,999,999	1.00%

36	Prospectus 2014

Columbia Diversified Real Return Fund

Choosing a Share Class (continued)

Class T Shares — Commission Schedule (Paid by the Distributor to Selling Agents)
Purchase Amount	Commission Level (as a % of net asset value per share)
$3 million – $49,999,999	0.50%
$50 million or more	0.25%

Reductions/Waivers of Sales Charges

Front-End Sales Charge Reductions

There are two ways in which you may be able to reduce the front-end sales charge that you may pay when you buy Class A shares or Class T shares of a Fund. These types of sales charge reductions are also referred to as breakpoint discounts.

First, through the right of accumulation (ROA), you may combine the value of eligible accounts maintained by you and members of your immediate family to reach a breakpoint discount level and apply a lower sales charge to your purchase. To calculate the combined value of your Fund accounts in the particular class of shares, the Fund will use the current public offering price per share. For purposes of obtaining a breakpoint discount through ROA, you may aggregate your or your immediate family members' ownership of different classes of shares, except for Class I, Class K, Class R, Class R4, Class R5 and Class Y shares of the Funds and direct purchases of Columbia Money Market Fund shares, which may not be aggregated. Shares of Columbia Money Market Fund acquired by exchange from other Funds may be combined for ROA purposes.

Second, by making a statement of intent to purchase additional shares (commonly referred to as a letter of intent (LOI)), you may pay a lower sales charge on all purchases (including existing ROA purchases) of Class A shares or Class T shares made within 13 months of the date of your LOI. Your LOI must state the aggregate amount of purchases you intend to make in that 13-month period, which must be at least $50,000 (or $100,000 for Funds with breakpoint discounts beginning at $100,000). The required form of LOI may vary by selling agent, so please contact them directly for more information. Five percent of the purchase commitment amount will be placed in escrow. At the end of the 13-month period, the shares will be released from escrow, provided that you have invested the commitment amount. If you do not invest the commitment amount by the end of the 13 months, the remaining amount of the unpaid sales charge will be redeemed from the escrowed shares and the remaining balance released from escrow. To calculate the total value of the purchases you've made under an LOI, the Fund will use the historic cost (i.e., dollars invested) of the shares held in each eligible account. For purposes of making an LOI to purchase additional shares, you may aggregate your ownership of different classes of shares, except for Class I, Class K, Class R, Class R4, Class R5 and Class Y shares of the Funds and direct purchases of Columbia Money Market Fund shares, which may not be aggregated. Shares of Columbia Money Market Fund acquired by exchange from other Funds may be combined for LOI purposes.

You must request the reduced sales charge (whether through ROA or an LOI) when you buy shares. If you do not complete and file an LOI, or do not request the reduced sales charge at the time of purchase, you will not be eligible for the reduced sales charge. To obtain a breakpoint discount, you must notify your selling agent in writing at the time you buy your shares of each eligible account maintained by you and members of your immediate family, including accounts maintained through different selling agents. You and your selling agent are responsible for ensuring that you receive discounts for which you are eligible. The Fund is not responsible for a selling agent's failure to apply the eligible discount to your account. You may be asked by your selling agent for account statements or other records to verify your discount eligibility, including, when applicable, records for accounts opened with a different selling agent and records of accounts established by members of your immediate family.

Prospectus 2014

Columbia Diversified Real Return Fund

Choosing a Share Class (continued)

FUNDamentals

Your “Immediate Family” and Account Value Aggregation

For purposes of obtaining a breakpoint discount for Class A shares or Class T shares the value of your account will be deemed to include the value of all applicable shares in eligible Fund accounts that are held by you and your “immediate family,” which includes your spouse, domestic partner, parent, step-parent, legal guardian, child, step-child, father-in-law and mother-in-law, provided that you and your immediate family members share the same mailing address. Any Fund accounts linked together for account value aggregation purposes as of the close of business on September 3, 2010 will be permitted to remain linked together. Group plan accounts are valued at the plan level.

Eligible Accounts

The following accounts are eligible for account value aggregation as described above, provided that they are invested in Class A, Class B, Class C, Class E, Class F, Class T, Class W or Class Z shares of a Fund: individual or joint accounts; Roth and traditional Individual Retirement Accounts (IRAs); Simplified Employee Pension accounts (SEPs), Savings Investment Match Plans for Employees of Small Employers accounts (SIMPLEs) and Tax Sheltered Custodial Accounts (TSCAs); Uniform Gifts to Minors Act (UGMA)/Uniform Transfers to Minors Act (UTMA) accounts for which you, your spouse, or your domestic partner is parent or guardian of the minor child; revocable trust accounts for which you or an immediate family member, individually, is the beneficial owner/grantor; accounts held in the name of your, your spouse’s, or your domestic partner’s sole proprietorship or single owner limited liability company or S corporation; qualified retirement plan assets, provided that you are the sole owner of the business sponsoring the plan, are the sole participant (other than a spouse) in the plan, and have no intention of adding participants to the plan; and investments in wrap accounts.

The following accounts are not eligible for account value aggregation as described above: accounts of pension and retirement plans with multiple participants, such as 401(k) plans (which are combined to reduce the sales charge for the entire pension or retirement plan and therefore are not used to reduce the sales charge for your individual accounts); investments in 529 plans, donor advised funds, variable annuities, variable insurance products or managed separate accounts; charitable and irrevocable trust accounts; accounts holding shares of money market funds that used the Columbia brand before May 1, 2010; and accounts invested in Class I, Class K, Class R, Class R4, Class R5 or Class Y shares of a Fund.

Front-End Sales Charge Waivers

The Distributor may waive front-end sales charges on purchases of Class A and Class T shares of the Funds by certain categories of investors, including Board members, certain employees of selling agents, Fund portfolio managers and certain retirement and employee benefit plans. The Distributor may waive front-end sales charges on (i) purchases (including exchanges) of Class A shares in accounts of selling agents that have entered into agreements with the Distributor to offer Fund shares to self-directed investment brokerage accounts that may or may not charge a transaction fee to customers and (ii) exchanges of Class Z shares of a Fund for Class A shares of the Fund. For a more complete description of categories of investors who may purchase Class A and Class T shares of the Funds at NAV, without payment of any front-end sales charge that would otherwise apply, see Appendix S to the SAI. In addition, certain types of purchases of Class A and Class T shares may be made at NAV. For a description of these eligible transactions, see Appendix S to the SAI.

CDSC Waivers

You may be able to avoid an otherwise applicable CDSC when you sell Class A, Class B, Class C or Class T shares of the Fund. This could happen because of the way in which you originally invested in the Fund, because of your relationship with the Funds or for other reasons. For example, the CDSC will be waived on redemptions of shares in the event of the shareholder's death; that result from required minimum distributions taken from retirement accounts when the shareholder reaches age 70½; in connection with the Fund's Small Account Policy (which is described in Buying, Selling and Exchanging Shares — Transaction Rules and Policies); and by certain other investors and in certain other types of transactions. For a more complete description of the available waivers of the CDSC on redemptions of Class A, Class B, Class C or Class T shares, see Appendix S to the SAI.

38	Prospectus 2014

Columbia Diversified Real Return Fund

Choosing a Share Class (continued)

Repurchases

Investors can also buy Class A shares without paying a sales charge if the purchase is made from the proceeds of a redemption of any Class A, Class B, Class C or Class T shares of a Fund (other than Columbia Money Market Fund) within 90 days, up to the amount of the redemption proceeds. Any CDSC paid upon redemption of your Class A, Class B, Class C or Class T shares of a Fund will not be reimbursed.

To be eligible for the reinstatement privilege, the purchase must be made into an account for the same owner, but does not need to be into the same Fund from which the shares were sold. The Transfer Agent, Distributor or their agents must receive a written reinstatement request from you or your selling agent within 90 days after the shares are redeemed and the purchase of Class A shares through this reinstatement privilege will be made at the NAV of such shares next calculated after the request is received in “good form.” The repurchased shares will be deemed to have the original purchase date for purposes of applying the CDSC (if any) to subsequent redemptions. Systematic withdrawals and purchases are excluded from this policy.

Restrictions and Changes in Terms and Conditions

Restrictions may apply to certain accounts and certain transactions. The Funds may change or cancel these terms and conditions at any time. Unless you provide your selling agent with information in writing about all of the factors that may count toward a waiver of a sales charge, there can be no assurance that you will receive all of the waivers for which you may be eligible. You should request that your selling agent provide this information to the Fund when placing your purchase order. Please see Appendix S of the SAI for more information about the sales charge reductions and waivers.

Distribution and Service Fees

The Board has approved, and the Funds have adopted, distribution and/or shareholder service plans which set the distribution and/or service fees that are periodically deducted from the Fund's assets. These fees are calculated daily, may vary by share class and are intended to compensate the Distributor and/or eligible selling agents for selling Fund shares and directly or indirectly providing services to shareholders. Because the fees are paid out of the Fund's assets on an ongoing basis, they will increase the cost of your investment over time.

The table below shows the maximum annual distribution and/or service fees (as an annual % of average daily net assets) and the combined amount of such fees applicable to each share class:

	Distribution Fee	Service Fee	Combined Total
Class A	up to 0.25%	up to 0.25%	up to 0.35%^(a)(b)(c)
Class B	0.75% ^(d)	0.25%	1.00% ^(b)
Class C	0.75% ^(c)(e)	0.25%	1.00% ^(b)
Class I	None	None	None
Class K	None	0.25% ^(f)	0.25% ^(f)
Class R (Legacy Columbia Funds)	0.50%	— ^(g)	0.50%
Class R (Legacy RiverSource Funds)	up to 0.50%^(c)	up to 0.25%	0.50% ^(g)
Class R4	None	None	None
Class R5	None	None	None
Class T	None	0.50% ^(h)	0.50% ^(h)
Class W	up to 0.25%	up to 0.25%	0.25% ^(c)
Class Y	None	None	None
Class Z	None	None	None

Prospectus 2014

Columbia Diversified Real Return Fund

Choosing a Share Class (continued)

(a)	The maximum distribution and service fees of Class A shares varies among the Funds, as shown in the table below:

Funds	Maximum Class A Distribution Fee	Maximum Class A Service Fee	Maximum Class A Combined Total
Legacy RiverSource Funds (other than Columbia Money Market Fund)	up to 0.25%	up to 0.25%	0.25%
Columbia Money Market Fund	—	—	0.10%
Columbia Balanced Fund, Columbia Contrarian Core Fund, Columbia Dividend Income Fund, Columbia Intermediate Bond Fund, Columbia Large Cap Growth Fund, Columbia Mid Cap Growth Fund, Columbia Oregon Intermediate Municipal Bond Fund, Columbia Real Estate Equity Fund, Columbia Small Cap Core Fund, Columbia Small Cap Growth Fund I, Columbia Technology Fund	up to 0.10%	up to 0.25%	up to 0.35%; these Funds may pay distribution and service fees up to a maximum of 0.35% of their average daily net assets attributable to Class A shares (comprised of up to 0.10% for distribution services and up to 0.25% for shareholder liaison services) but currently limit such fees to an aggregate fee of not more than 0.25% for Class A shares
Columbia Bond Fund, Columbia California Tax-Exempt Fund, Columbia Connecticut Intermediate Municipal Bond Fund, Columbia Corporate Income Fund, Columbia Diversified Real Return Fund, Columbia Emerging Markets Fund, Columbia Global Dividend Opportunity Fund, Columbia Global Energy and Natural Resources Fund, Columbia Greater China Fund, Columbia International Bond Fund, Columbia Massachusetts Intermediate Municipal Bond Fund, Columbia New York Intermediate Municipal Bond Fund, Columbia New York Tax-Exempt Fund, Columbia Risk Allocation Fund, Columbia Small Cap Value Fund I, Columbia Pacific/Asia Fund, Columbia Select Large Cap Growth Fund, Columbia Strategic Income Fund, Columbia U.S. Treasury Index Fund, Columbia Value and Restructuring Fund	—	0.25%	0.25%
Columbia High Yield Municipal Fund, Columbia Intermediate Municipal Bond Fund, Columbia Tax Exempt Fund	—	0.20%	0.20%
Columbia California Intermediate Municipal Bond Fund, Columbia Capital Allocation Moderate Aggressive Portfolio, Columbia Capital Allocation Moderate Conservative Portfolio, Columbia Convertible Securities Fund, Columbia Georgia Intermediate Municipal Bond Fund, Columbia International Value Fund, Columbia Large Cap Enhanced Core Fund, Columbia Large Cap Index Fund, Columbia LifeGoal^® Growth Portfolio, Columbia Marsico 21st Century Fund, Columbia Marsico Focused Equities Fund, Columbia Marsico Growth Fund, Columbia Marsico International Opportunities Fund, Columbia Marsico Global Fund, Columbia Maryland Intermediate Municipal Bond Fund, Columbia Masters International Equity Portfolio, Columbia Mid Cap Index Fund, Columbia Mid Cap Value Fund, Columbia Multi-Advisor International Equity Fund, Columbia North Carolina Intermediate Municipal Bond Fund, Columbia Overseas Value Fund, Columbia Select Large Cap Equity Fund, Columbia Short Term Bond Fund, Columbia Short Term Municipal Bond Fund, Columbia Small Cap Index Fund, Columbia Small Cap Value Fund II, Columbia South Carolina Intermediate Municipal Bond Fund, Columbia Virginia Intermediate Municipal Bond Fund	—	—	0.25%; these Funds pay a combined distribution and service fee

(b)

The service fees for Class A shares, Class B shares and Class C shares of certain Funds vary. Service Fee for Class A shares, Class B shares and Class C shares of Columbia High Yield Municipal Fund, Columbia Intermediate Municipal Bond Fund and Columbia Tax-Exempt Fund — The annual service fee may equal up to 0.20% of the average daily net asset value of all shares of such Fund class. Distribution Fee for Class B shares and Class C shares for Columbia Intermediate Municipal Bond Fund — The annual distribution fee shall be 0.65% of the average daily net assets of the Fund's Class B shares and Class C shares. Fee amounts noted apply to Class B shares of the Funds other than Class B shares of Columbia Money Market Fund, which pays distribution fees of up to 0.75% and service fees of up to 0.10% for a combined total of 0.85%. The Distributor has currently agreed not to be reimbursed by the Fund for 0.10% of the 0.85% fee for Class B shares of Columbia Money Market Fund.

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Columbia Diversified Real Return Fund

Choosing a Share Class (continued)

(c)	Fee amounts noted apply to all Funds other than Columbia Money Market Fund, which, for each of Class A and Class W shares, pays distribution and service fees of 0.10%, and for Class C shares pays distribution fees of 0.75%. The Distributor has currently agreed not to be reimbursed by the Fund for 0.25% of the 0.50% fee for Class R shares of Columbia Money Market Fund. Effective April 15, 2010, the Distributor voluntarily agreed to waive the 12b-1 fees it receives from Class A, Class C, Class R and Class W shares of Columbia Money Market Fund. Compensation paid to broker-dealers and other selling agents may be suspended to the extent of the Distributor's waiver of the 12b-1 fees on these specific share classes of these Funds.
(d)	The Distributor has voluntarily agreed to waive the distribution fee it receives from Class B shares of Columbia Seligman Communications and Information Fund (effective January 1, 2013) and Columbia Global Infrastructure Fund (effective September 12, 2013). The Distributor has voluntarily agreed, effective February 15, 2013, to waive a portion of the distribution fee for Class B shares of Columbia Short Term Bond Fund so that the distribution fee does not exceed 0.30% annually. These arrangements may be modified or terminated by the Distributor at any time.
(e)	The Distributor has voluntarily agreed to waive a portion of the distribution fee for Class C shares of the following Funds so that the distribution fee does not exceed the specified percentage annually: 0.31% for Columbia Short Term Bond Fund; 0.40% for Columbia Oregon Intermediate Municipal Bond Fund; 0.45% for Columbia California Tax-Exempt Fund, Columbia Connecticut Intermediate Municipal Bond Fund, Columbia Massachusetts Intermediate Municipal Bond Fund, Columbia New York Intermediate Municipal Bond Fund, Columbia New York Tax-Exempt Fund and Columbia Tax-Exempt Fund; and 0.60% for Columbia Bond Fund, Columbia Corporate Income Fund, Columbia High Yield Bond Fund, Columbia High Yield Municipal Fund, Columbia Intermediate Bond Fund, Columbia Strategic Income Fund and Columbia U.S. Treasury Index Fund. These arrangements may be modified or terminated by the Distributor at any time.
(f)	The shareholder service fees for Class K shares are not paid pursuant to a 12b-1 plan. Under a plan administration services agreement, the Funds' Class K shares pay for plan administration services. See Class K Plan Administration Services Fee below for more information.
(g)	Class R shares of Legacy Columbia Funds pay a distribution fee pursuant to a distribution (Rule 12b-1) plan for Class R shares. The Funds do not have a shareholder service plan for Class R shares. The Legacy RiverSource Funds have a distribution and shareholder service plan for Class R shares, which, prior to the close of business on September 3, 2010, were known as Class R2 shares. For Class R shares of Legacy RiverSource Funds, the maximum fee under the plan reimbursed for distribution expenses is equal on an annual basis to 0.50% of the average daily net assets of the Fund attributable to Class R shares. Of that amount, up to 0.25% may be reimbursed for shareholder service expenses.
(h)	The shareholder servicing fees for Class T shares are up to 0.50% of average daily net assets attributable to Class T shares for equity Funds and 0.40% for fixed income Funds. The Funds currently limit such fees to a maximum of 0.30% for equity Funds and 0.15% for fixed-income Funds. See Class T Shareholder Service Fees below for more information.

The distribution and/or shareholder service fees for Class A, Class B, Class C, Class R and Class W shares, as applicable, may be subject to the requirements of Rule 12b-1 under the Investment Company Act of 1940, as amended (the 1940 Act). The Distributor may retain these fees otherwise payable to selling agents if the amounts due are below an amount determined by the Distributor in its sole discretion.

For Legacy RiverSource Fund Class A, Class B and Class W shares, the Distributor begins to pay these fees immediately after purchase. For Legacy RiverSource Fund Class C shares, the Distributor pays these fees in advance for the first 12 months. Selling agents also receive distribution fees up to 0.75% of the average daily net assets of Legacy RiverSource Fund Class C shares sold and held through them, which the Distributor begins to pay 12 months after purchase. For Legacy RiverSource Fund Class B shares and for the first 12 months following the sale of Legacy RiverSource Fund Class C shares, the Distributor retains the distribution fee of up to 0.75% in order to finance the payment of sales commissions to selling agents and to pay for other distribution related expenses. Selling agents may compensate their financial advisors with the shareholder service and distribution fees paid to them by the Distributor.

For Legacy Columbia Fund Class R shares and, with the exception noted in the next sentence, Class A shares, the Distributor begins to pay these fees immediately after purchase. For Legacy Columbia Fund Class B shares, Class A shares (if purchased as part of a purchase of shares of $1 million or more) and, with the exception noted in the next sentence, Class C shares, the Distributor begins to pay these fees 12 months after purchase (for Legacy Columbia Fund Class B share, and for the first 12 months following the sale of Legacy Columbia Fund Class C shares, the Distributor retains the distribution fee of up to 0.75% in order to finance the payment of sales commissions to selling agents and to pay for other distribution related expenses). For Legacy Columbia Fund Class C shares, selling agents may opt to decline payment of sales commission and, instead, may receive these fees immediately after purchase. Selling agents may compensate their financial advisors with the shareholder service and distribution fees paid to them by the Distributor.

If you maintain shares of the Fund directly with the Fund, without working directly with a financial advisor or selling agent, distribution and service fees may be retained by the Distributor as payment or reimbursement for incurring certain distribution and shareholder service related expenses.

Over time, these distribution and/or shareholder service fees will reduce the return on your investment and may cost you more than paying other types of sales charges. The Fund will pay these fees to the Distributor and/or to eligible selling agents for as long as the distribution plan and/or shareholder servicing plans continue in effect, which is expected to be indefinitely. The Fund may reduce or discontinue payments at any time. Your selling agent may also charge you other additional fees for providing services to your account, which may be different from those described here.

Prospectus 2014

Columbia Diversified Real Return Fund

Choosing a Share Class (continued)

Class K Plan Administration Services Fee

Class K shares pay an annual plan administration services fee for the provision of various administrative, recordkeeping, communication and educational services, including services such as implementation and conversion services, account set-up and maintenance, reconciliation and account recordkeeping and administration to various plan types, including 529 plans, retirement plans and health savings accounts. The fee for Class K shares is equal on an annual basis to 0.25% of average daily net assets attributable to the class.

Class T Shareholder Services Fees

The Funds that offer Class T shares have adopted a shareholder services plan that permits them to pay for certain services provided to Class T shareholders by their selling agents. Equity Funds may pay shareholder servicing fees up to an aggregate annual rate of 0.50% of the Fund's average daily net assets attributable to Class T shares (comprised of up to 0.25% for shareholder liaison services and up to 0.25% for administrative support services). Fixed income Funds may pay shareholder servicing fees up to an aggregate annual rate of 0.40% of the Fund's average daily net assets attributable to Class T shares (comprised of up to 0.20% for shareholder liaison services and up to 0.20% for administrative support services). These fees are currently limited to an aggregate annual rate of not more than 0.30% for equity Funds and not more than 0.15% for fixed income Funds. With respect to those Funds that declare dividends on a daily basis, the shareholder servicing fee shall be waived by the selling agents to the extent necessary to prevent net investment income from falling below 0% on a daily basis.

Selling Agent Compensation

The Distributor, the Investment Manager and their affiliates make payments, from their own resources, to selling agents, including other Ameriprise Financial affiliates, for marketing/sales support services relating to the Funds (Marketing Support Payments). Such payments are generally based upon one or more of the following factors: average net assets of the Funds sold by the Distributor attributable to that selling agent, gross sales of the Funds distributed by the Distributor attributable to that selling agent, reimbursement of ticket charges (fees that a selling agent charges its representatives for effecting transactions in Fund shares) or a negotiated lump sum payment. While the financial arrangements may vary for each selling agent, Marketing Support Payments to any one selling agent are generally between 0.05% and 0.50% on an annual basis for payments based on average net assets of the Fund attributable to the selling agent, and between 0.05% and 0.25% on an annual basis for firms receiving a payment based on gross sales of the Funds attributable to the selling agent. The Distributor, the Investment Manager and their affiliates may make payments in larger amounts or on a basis other than those described above when dealing with certain selling agents, including certain affiliates of Bank of America Corporation (Bank of America). Such increased payments may enable such selling agents to offset credits that they may provide to customers. The Distributor, the Investment Manager and their affiliates do not make Marketing Support Payments with respect to Class Y shares; provided, however, that such payments are made to Bank of America with respect to Class Y shares of Columbia Bond Fund, Columbia Global Dividend Opportunity Fund, Columbia Income Opportunities Fund, Columbia Large Cap Enhanced Core Fund, Columbia Mid Cap Growth Fund, Columbia Mid Cap Value Fund, Columbia Multi-Advisor International Equity Fund, Columbia Short Term Bond Fund, Columbia Small Cap Growth Fund I and Columbia Small Cap Value Fund I.

In addition, the Transfer Agent has certain arrangements in place to compensate selling agents, including other Ameriprise Financial affiliates, that hold Fund shares through omnibus accounts, including omnibus retirement plans, for services that they provide to beneficial shareholders (Shareholder Services). Shareholder Services may include sub-accounting, sub-transfer agency, participant recordkeeping, shareholder or participant reporting, shareholder or participant transaction processing, keeping shareholder records, preparing account statements and providing customer service. Payments for Shareholder Services vary by selling agent but generally are not expected, with certain limited exceptions, to exceed 0.40% of the average aggregate value of the Fund’s shares. Generally, each Fund (other than the Columbia Acorn Funds) pays a percentage of the average aggregate value of shares maintained in omnibus accounts: 0.20% for all share classes other than Class I, K, R5 and Y shares; 0.05% for Class K and R5 shares; and 0% for Class I and Y shares. The amounts in excess of that reimbursed by the Fund are borne by the Distributor, the Investment Manager and/or their affiliates. The Transfer Agent does not pay selling agents for Shareholder Services and the Fund does not pay the Transfer Agent for any Shareholder Services provided by selling agents, with respect to Class Y shares.

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Choosing a Share Class (continued)

In addition to the payments described above, the Distributor, the Investment Manager and their affiliates may make other payments or allow promotional incentives to broker-dealers to the extent permitted by SEC and Financial Industry Regulatory Authority (FINRA) rules and by other applicable laws and regulations.

Amounts paid by the Distributor, the Investment Manager and their affiliates are paid out of their own resources and do not increase the amount paid by you or the Fund. You can find further details in the SAI about the payments made by the Distributor, the Investment Manager and their affiliates, as well as a list of the selling agents, including Ameriprise Financial affiliates, to which the Distributor and the Investment Manager have agreed to make Marketing Support Payments and Shareholder Services fees.

Your selling agent may charge you fees and commissions in addition to those described in this prospectus. You should consult with your selling agent and review carefully any disclosure your selling agent provides regarding its services and compensation. Depending on the financial arrangement in place at any particular time, a selling agent and its financial advisors may have a financial incentive for recommending the Fund or a particular share class over others.

Prospectus 2014

Columbia Diversified Real Return Fund

Buying, Selling and Exchanging Shares

Share Price Determination

The price you pay or receive when you buy, sell or exchange shares is the Fund's next determined net asset value (or NAV) per share for a given share class. The Fund calculates the NAV per share for each class of shares of the Fund at the end of each business day.

FUNDamentals

NAV Calculation

Each of the Fund's share classes calculates its NAV as follows:

NAV = (Value of assets of the share class) – (Liabilities of the share class)
Number of outstanding shares of the class

FUNDamentals

Business Days

A business day is any day that the New York Stock Exchange (NYSE) is open. A business day ends at the close of regular trading on the NYSE, usually at 4:00 p.m. Eastern time. If the NYSE closes early, the business day ends as of the time the NYSE closes. On holidays and other days when the NYSE is closed, the Fund's NAV is not calculated and the Fund does not accept buy or sell orders. However, the value of the Fund's assets may still be affected on such days to the extent that the Fund holds foreign securities that trade on days that foreign securities markets are open.

Equity securities are valued primarily on the basis of market quotations reported on stock exchanges and other securities markets around the world. If an equity security is listed on a national exchange, the security is valued at the closing price or, if the closing price is not readily available, the mean of the closing bid and asked prices. Certain equity securities, debt securities and other assets are valued differently. For instance, bank loans trading in the secondary market are valued primarily on the basis of indicative bids, fixed-income investments maturing in 60 days or less are valued primarily using the amortized cost method and those maturing in excess of 60 days are valued at the readily available market price, if available. Investments in other open-end funds are valued at their NAVs. Both market quotations and indicative bids are obtained from outside pricing services approved and monitored pursuant to a policy approved by the Fund's Board. For a money market fund, the Fund's investments are valued at amortized cost, which approximates market value.

If a market price isn't readily available or is deemed not to reflect market value, the Fund will determine the price of the security held by the Fund based on a determination of the security's fair value pursuant to a policy approved by the Fund's Board. In addition, the Fund may use fair valuation to price securities that trade on a foreign exchange when a significant event has occurred after the foreign exchange closes but before the time at which the Fund's share price is calculated. Foreign exchanges typically close before the time at which Fund share prices are calculated, and may be closed altogether on some days when the Fund is open. Such significant events affecting a foreign security may include, but are not limited to: (1) corporate actions, earnings announcements, litigation or other events impacting a single issuer; (2) governmental action that affects securities in one sector or country; (3) natural disasters or armed conflicts affecting a country or region; or (4) significant domestic or foreign market fluctuations. The Fund uses various criteria, including an evaluation of U.S. market moves after the close of foreign markets, in determining whether a foreign security's market price is readily available and reflective of market value and, if not, the fair value of the security. To the extent the Fund has significant holdings of small cap stocks, high yield bonds, floating rate loans, or tax-exempt, foreign or other securities that may trade infrequently, fair valuation may be used more frequently than for other funds.

Fair valuation may have the effect of reducing stale pricing arbitrage opportunities presented by the pricing of Fund shares. However, when the Fund uses fair valuation to price securities, it may value those securities higher or lower than another fund would have priced the security. Also, the use of fair valuation may cause the Fund's performance to diverge to a greater degree from the performance of various benchmarks used to compare the Fund's performance because benchmarks generally do not use

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Buying, Selling and Exchanging Shares (continued)

fair valuation techniques. Because of the judgment involved in fair valuation decisions, there can be no assurance that the value ascribed to a particular security is accurate. The Fund has retained one or more independent fair valuation pricing services to assist in the fair valuation process for foreign securities.

Transaction Rules and Policies

The Fund, the Distributor or the Transfer Agent may refuse any order to buy or exchange shares. If this happens, the Fund will return any money it received, but no interest will be paid on that money.

Order Processing

Orders to buy, sell or exchange Fund shares are processed on business days. Depending upon the class of shares, orders can be made by mail, by telephone or online. Orders received in “good form” by the Transfer Agent or your selling agent before the end of a business day are priced at the NAV per share of the Fund's applicable share class on that day. Orders received after the end of a business day will receive the next business day's NAV per share. When a written order to buy, sell or exchange shares is sent to the Transfer Agent, the share price used to fill the order is the next price calculated by the Fund after the Transfer Agent receives the order at its transaction processing center in Canton, Massachusetts, not the P.O. Box provided for regular mail delivery. The market value of the Fund's investments may change between the time you submit your order and the time the Fund next calculates its NAV per share. The business day that applies to your order is also called the trade date.

“Good Form”

An order is in “good form” if the Transfer Agent or your selling agent has all of the information and documentation it deems necessary to effect your order. For example, when you sell shares by letter of instruction, “good form” means that your letter has (i) complete instructions and the signatures of all account owners, (ii) a Medallion Signature Guarantee (as described below) for amounts greater than $100,000 and (iii) any other required documents completed and attached. For the documents required for sales by corporations, agents, fiduciaries, surviving joint owners and other legal entities, call 800.345.6611.

Medallion Signature Guarantees

A Medallion Signature Guarantee helps assure that a signature is genuine and not a forgery. The selling agent providing the Medallion Signature Guarantee is financially liable for the transaction if the signature is a forgery.

A Medallion Signature Guarantee is required if:

■	The amount is greater than $100,000.
■	You want your check made payable to someone other than the registered account owner(s).
■	Your address of record has changed within the last 30 days.
■	You want the check mailed to an address other than the address of record.
■	You want the proceeds sent to a bank account not on file.
■	You are the beneficiary of the account and the account owner is deceased (additional documents may be required).

Customer Identification Program

Federal law requires the Fund to obtain and record specific personal information to verify your identity when you open an account. This information may include your name, address, date of birth (for individuals) and taxpayer or other government issued identification (e.g., social security number (SSN) or other taxpayer identification number (TIN)). If you fail to provide the requested information, the Fund may need to delay the date of your purchase or may be unable to open your account, which may result in a return of your investment monies. In addition, if the Fund is unable to verify your identity after your account is open, the Fund reserves the right to close your account or take other steps as deemed reasonable. The Fund will not be liable for any loss resulting from any purchase delay, application rejection or account closure due to a failure to provide proper identifying information.

Prospectus 2014

Columbia Diversified Real Return Fund

Buying, Selling and Exchanging Shares (continued)

Small Account Policy — Class A, Class B, Class C, Class T and Class Z Share Accounts Below the Minimum Account Balance

The Funds generally will automatically sell your shares if the value of your Fund account (treating each account of the Fund you own separately from any other account of the Fund you may own) falls below the applicable Minimum Account Balance. The Minimum Account Balance varies among Funds, share classes and types of accounts, as follows:

Minimum Account Balance
	Minimum Account Balance
For all Funds, classes and account types except those listed below	$250 (None for accounts with Systematic Investment Plans)
Individual Retirement Accounts for all Funds and classes except those listed below	None
Columbia Absolute Return Currency and Income Fund and Columbia Absolute Return Emerging Markets Macro Fund	$5,000
Columbia Floating Rate Fund and Columbia Inflation Protected Securities Fund	$2,500
Class I, Class K, Class R, Class R4, Class R5, Class W and Class Y	None

If your shares are sold, the Transfer Agent will remit the sale proceeds to you. Any otherwise applicable CDSC will not be imposed on such an automatic sale of your shares. The Transfer Agent will send you written notification in advance of any automatic sale, which will provide details on how you may avoid such an automatic sale. Generally, you may avoid such an automatic sale by raising your account balance, consolidating your accounts through an exchange of shares of another Fund in which you hold shares, or setting up a Systematic Investment Plan. For more information, contact the Transfer Agent or your selling agent. The Transfer Agent's contact information (toll-free number and mailing addresses) as well as the Funds' website address can be found at the beginning of the section Choosing a Share Class.

The Fund also may sell your Fund shares if your selling agent tells us to sell your shares pursuant to arrangements made with you, and under certain other circumstances allowed under the 1940 Act.

Small Account Policy — Class A, Class B, Class C, Class T and Class Z Share Accounts Minimum Balance Fee

If the value of your Fund account (treating each account of the Fund you own separately from any other account of the Fund you may own) falls below the minimum initial investment requirement applicable to you for any reason, including as a result of market decline, your account generally will be subject to a $20 annual fee. This fee will be assessed through the automatic sale of Fund shares in your account. Any otherwise applicable CDSC will not be imposed on such an automatic sale of your shares. The Transfer Agent will reduce the expenses paid by the Fund by any amounts it collects from the assessment of this fee. For Funds that do not have transfer agency expenses against which to offset the amount collected through assessment of this fee, the fee will be paid directly to the Fund. The Transfer Agent will send you written notification in advance of assessing any fee, which will provide details on how you can avoid the imposition of such fee. Generally, you may avoid the imposition of such fee by raising your Fund account balance, consolidating your Fund accounts through an exchange of shares of another Fund in which you hold shares, or setting up a Systematic Investment Plan that invests at least monthly. For more information, contact the Transfer Agent or your selling agent. The Transfer Agent's contact information (toll-free number and mailing address(es)) as well as the Funds' website address can be found at the beginning of the section Choosing a Share Class.

The Funds reserve the right to lower the account size trigger point for the minimum balance fee in any year or for any class of shares when we believe it is appropriate to do so in light of declines in the market value of Fund shares, sales loads applicable to a particular class of shares, or for other reasons.

Exceptions to the Small Account Policy (Accounts Below Minimum Account Balance and Minimum Balance Fee)

The automatic sale of Fund shares of accounts under $250 and the annual minimum balance fee described above do not apply to shareholders of Class I, Class K, Class R, Class R4, Class R5, Class W and Class Y shares; shareholders holding their shares through broker-dealer networked accounts; wrap fee and omnibus accounts; accounts with active Systematic Investment Plans; certain qualified retirement plans; and health savings accounts. The automatic sale of Fund shares of accounts under the applicable Minimum Account Balance does not apply to individual retirement plans.

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Buying, Selling and Exchanging Shares (continued)

Small Account Policy — Broker-Dealer and Wrap Fee Accounts

The Funds may automatically redeem, at any time, broker-dealer networked accounts and wrap fee accounts that have account balances of $20 or less or have less than one share.

Information Sharing Agreements

As required by Rule 22c-2 under the 1940 Act, the Funds or certain of their service providers will enter into information sharing agreements with selling agents, including participating life insurance companies and selling agents that sponsor or offer retirement plans through which shares of the Funds are made available for purchase. Pursuant to Rule 22c-2, selling agents are required, upon request, to: (i) provide shareholder account and transaction information and (ii) execute instructions from the Fund to restrict or prohibit further purchases of Fund shares by shareholders who have been identified by the Fund as having engaged in transactions that violate the Fund's excessive trading policies and procedures.

Excessive Trading Practices Policy of Non-Money Market Funds

Right to Reject or Restrict Share Transaction Orders — The Fund is intended for investors with long-term investment purposes and is not intended as a vehicle for frequent trading activity (market timing) that is excessive. Investors should transact in Fund shares primarily for investment purposes. The Board has adopted excessive trading policies and procedures that are designed to deter excessive trading by investors (the Excessive Trading Policies and Procedures). The Fund discourages and does not accommodate excessive trading.

The Fund reserves the right to reject, without any prior notice, any purchase or exchange order for any reason, and will not be liable for any loss resulting from rejected orders. For example, the Fund may in its sole discretion restrict or reject a purchase or exchange order even if the transaction is not subject to the specific limitation described below if the Fund or its agents determine that accepting the order could interfere with efficient management of the Fund's portfolio or is otherwise contrary to the Fund's best interests. The Excessive Trading Policies and Procedures apply equally to purchase or exchange transactions communicated directly to the Transfer Agent and to those received by selling agents.

Specific Buying and Exchanging Limitations — If a Fund detects that an investor has made two “material round trips” in any 28-day period, it will generally reject the investor's future purchase orders, including exchange purchase orders, involving any Fund.

For these purposes, a “round trip” is a purchase or exchange into the Fund followed by a sale or exchange out of the Fund, or a sale or exchange out of the Fund followed by a purchase or exchange into the Fund. A “material” round trip is one that is deemed by the Fund to be material in terms of its amount or its potential detrimental impact on the Fund. Independent of this limit, the Fund may, in its sole discretion, reject future buy orders by any person, group or account that appears to have engaged in any type of excessive trading activity.

These limits generally do not apply to automated transactions or transactions by registered investment companies that invest in the Fund using a “fund-of-funds” structure. These limits do not apply to payroll deduction contributions by retirement plan participants, transactions initiated by a retirement plan sponsor or certain other retirement plan transactions consisting of rollover transactions, loan repayments and disbursements, and required minimum distribution redemptions. They may be modified or rescinded for accounts held by certain retirement plans to conform to plan limits, for considerations relating to the Employee Retirement Income Security Act of 1974 or regulations of the Department of Labor, and for certain asset allocation or wrap programs. Accounts known to be under common ownership or control generally will be counted together, but accounts maintained or managed by a common intermediary generally will not be considered to be under common ownership or control. The Fund retains the right to modify these restrictions at any time without prior notice to shareholders. In addition, the Fund may, in its sole discretion, reinstate trading privileges that have been revoked under the Fund's Excessive Trading Policies and Procedures.

Limitations on the Ability to Detect and Prevent Excessive Trading Practices — The Fund takes various steps designed to detect and prevent excessive trading, including daily review of available shareholder transaction information. However, the Fund receives buy, sell or exchange orders through selling agents, and cannot always know of or reasonably detect excessive trading that may be facilitated by selling agents or by the use of the omnibus account arrangements they offer. Omnibus account arrangements are common forms of holding shares of mutual funds, particularly among certain selling agents such as broker-dealers, retirement plans and variable insurance products. These arrangements often permit selling agents to aggregate their clients' transactions and accounts, and in these circumstances, the identity of the shareholders is often not known to the Fund.

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Columbia Diversified Real Return Fund

Buying, Selling and Exchanging Shares (continued)

Some selling agents apply their own restrictions or policies to underlying investor accounts, which may be more or less restrictive than those described here. This may impact the Fund's ability to curtail excessive trading, even where it is identified. For these and other reasons, it is possible that excessive trading may occur despite the Fund's efforts to detect and prevent it.

Although these restrictions and policies involve judgments that are inherently subjective and may involve some selectivity in their application, the Fund seeks to act in a manner that it believes is consistent with the best interests of shareholders in making any such judgments.

Risks of Excessive Trading — Excessive trading creates certain risks to the Fund's long-term shareholders and may create the following adverse effects:

■	negative impact on the Fund's performance;
■	potential dilution of the value of the Fund's shares;
■	interference with the efficient management of the Fund's portfolio, such as the need to maintain undesirably large cash positions, the need to use its line of credit or the need to buy or sell securities it otherwise would not have bought or sold;
■	losses on the sale of investments resulting from the need to sell securities at less favorable prices;
■	increased taxable gains to the Fund's remaining shareholders resulting from the need to sell securities to meet sell orders; and
■	increased brokerage and administrative costs.

To the extent that the Fund invests significantly in foreign securities traded on markets that close before the Fund's valuation time, it may be particularly susceptible to dilution as a result of excessive trading. Because events may occur after the close of foreign markets and before the Fund's valuation time that influence the value of foreign securities, investors may seek to trade Fund shares in an effort to benefit from their understanding of the value of foreign securities as of the Fund's valuation time. This is often referred to as price arbitrage. The Fund has adopted procedures designed to adjust closing market prices of foreign securities under certain circumstances to reflect what the Fund believes to be the fair value of those securities as of its valuation time. To the extent the adjustments don't work fully, investors engaging in price arbitrage may cause dilution in the value of the Fund's shares held by other shareholders.

Similarly, to the extent that the Fund invests significantly in thinly traded high-yield bonds (junk bonds) or equity securities of small-capitalization companies, because these securities are often traded infrequently, investors may seek to trade Fund shares in an effort to benefit from their understanding of the value of these securities. This is also a type of price arbitrage. Any such frequent trading strategies may interfere with efficient management of the Fund's portfolio to a greater degree than would be the case for mutual funds that invest in highly liquid securities, in part because the Fund may have difficulty selling those portfolio securities at advantageous times or prices to satisfy large and/or frequent sell orders. Any successful price arbitrage may also cause dilution in the value of Fund shares held by other shareholders.

Excessive Trading Practices Policy of Columbia Money Market Fund

A money market fund is designed to offer investors a liquid cash option that they may buy and sell as often as they wish. Accordingly, the Board has not adopted policies and procedures designed to discourage excessive or short-term trading of Columbia Money Market Fund shares. However, since frequent purchases and sales of Columbia Money Market Fund shares could in certain instances harm shareholders in various ways, including reducing the returns to long-term shareholders by increasing costs (such as spreads paid to dealers who trade money market instruments with Columbia Money Market Fund) and disrupting portfolio management strategies, Columbia Money Market Fund reserves the right, but has no obligation, to reject any purchase or exchange transaction at any time. Except as expressly described in this prospectus (such as minimum purchase amounts), Columbia Money Market Fund has no limits on purchase or exchange transactions. In addition, Columbia Money Market Fund reserves the right to impose or modify restrictions on purchases, exchanges or trading of Fund shares at any time.

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Buying, Selling and Exchanging Shares (continued)

Opening an Account and Placing Orders

We encourage you to consult with a financial advisor who can help you with your investment decisions and who can help you open an account. Once you have an account, you can buy, sell or exchange shares by contacting your financial advisor who will send your order to the Transfer Agent or your selling agent. As described below, once you have an account you can also communicate your orders directly to the Transfer Agent by mail, by telephone or online.

The Funds are generally available directly and through broker-dealers, banks and other selling agents or institutions, and through certain qualified and non-qualified plans, wrap fee products or other investment products sponsored by selling agents. You may exchange or sell shares through your selling agent. If you maintain your account directly with your selling agent, you must contact that agent to process your transaction.

Not all selling agents offer the Funds and certain selling agents that offer the Funds may not offer all Funds on all investment platforms or programs. Please consult with your financial advisor to determine the availability of the Funds. If you set up an account at a selling agent that does not have, and is unable to obtain, a selling agreement with the Distributor, you will not be able to transfer Fund holdings to that account. In that event, you must either maintain your Fund holdings with your current selling agent, find another selling agent with a selling agreement, or sell your Fund shares, paying any applicable CDSC. Please be aware that transactions in taxable accounts are taxable events and may result in income tax liability.

Selling agents that offer the Funds may charge you additional fees for the services they provide and they may have different policies that are not described in this prospectus. Some policy differences may include different minimum investment amounts, exchange privileges, Fund choices and cutoff times for investments. Additionally, recordkeeping, transaction processing and payments of distributions relating to your account may be performed by the selling agents through which your shares of the Fund are held. Since the Fund (and its service providers) may not have a record of your account transactions, you should always contact the financial advisor employed by the selling agent through which you purchased or at which you maintain your shares of the Fund to make changes to your account or to give instructions concerning your account, or to obtain information about your account. The Fund and its service providers, including the Distributor and the Transfer Agent, are not responsible for the failure of these selling agents to carry out their obligations to its customers.

The Fund may engage selling agents to receive purchase, exchange and sell orders on its behalf. Accounts established directly with the Fund will be serviced by the Transfer Agent. The Funds, the Transfer Agent and the Distributor do not provide investment advice.

Accounts Established Directly with the Fund

You or the financial advisor through which you buy shares may establish an account with the Fund. To do so, complete a Fund account application with your financial advisor or investment professional, and mail the account application to the Transfer Agent. Account applications may be obtained at columbiamanagement.com or may be requested by calling 800.345.6611. Make your check payable to the Fund. You will be assessed a $15 fee for any checks rejected by your financial institution due to insufficient funds or other reasons. The Funds do not accept cash, credit card convenience checks, money orders, traveler's checks, starter checks, third or fourth party checks, or other cash equivalents.

Mail your check and completed application to the Transfer Agent at its address that can be found at the beginning of the section Choosing a Share Class. You may also use these addresses to request an exchange or redemption of Fund shares. When a written order to buy, sell or exchange shares is sent to the Transfer Agent, the share price used to fill the order is the next price calculated by the Fund after the Transfer Agent receives the order at its transaction processing center in Canton, Massachusetts, not the P.O. Box provided for regular mail delivery.

You will be sent a statement confirming your purchase and any subsequent transactions in your account. You will also be sent quarterly and annual statements detailing your transactions in the Fund and the other Funds you own under the same account number. Duplicate quarterly account statements for the current year and duplicate annual statements for the most recent prior calendar year will be sent to you free of charge. Copies of year-end statements for prior years are available for a fee. Please contact the Transfer Agent for more information.

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Written Transactions

Once you have an account, you can communicate written buy, sell or exchange orders to the Transfer Agent at its address that can be found at the beginning of the section Choosing a Share Class. When a written order to buy, sell or exchange shares is sent to the Transfer Agent, the share price used to fill the order is the next price calculated by the Fund after the Transfer Agent receives the order at its transaction processing center in Canton, Massachusetts, not the P.O. Box provided for regular mail delivery.

Include in your letter: your name; the name of the Fund(s); your account number; the class of shares to be exchanged or sold; your SSN or other TIN; the dollar amount or number of shares you want to exchange or sell; specific instructions regarding delivery of redemption proceeds or exchange destination; signature(s) of registered account owner(s); and any special documents the Transfer Agent may require in order to process your order.

Corporate, trust or partnership accounts may need to send additional documents. Payment will be mailed to the address of record and made payable to the names listed on the account, unless your request specifies differently and is signed by all owners.

Telephone Transactions

For Class A, Class B, Class C, Class R, Class T, Class Y and Class Z shares, once you have an account, you may place orders to buy, sell or exchange shares by telephone. To place orders by telephone, call 800.422.3737. Have your account number and SSN or TIN available when calling.

You can sell Fund shares via the telephone, by electronic funds transfer or by check to the address of record, up to and including an aggregate of $100,000 of shares per day, per Fund account, if you qualify for telephone orders. Wire redemptions requested via the telephone are subject to a maximum of $3 million of shares per day, per Fund. You can buy up to and including $100,000 of shares per day, per Fund account through your bank account as an Automated Clearing House (ACH) transaction via the telephone if you qualify for telephone orders.

Telephone orders may not be as secure as written orders. The Fund will take reasonable steps to confirm that telephone instructions are genuine. For example, we require proof of your identification before we will act on instructions received by telephone and may record telephone conversations. However, the Fund and its agents will not be responsible for any losses, costs or expenses resulting from an unauthorized telephone instruction when reasonable steps have been taken to confirm that telephone instructions are genuine. Telephone orders may be difficult to complete during periods of significant economic or market change or business interruption.

Online Transactions

For Class A, Class B, Class C, Class R, Class T, Class Y and Class Z shares, once you have an account, you may contact the Transfer Agent at 800.345.6611 for more information on account trading restrictions and the special sign-up procedures required for online transactions. The Transfer Agent has procedures in place to authenticate electronic orders you deliver through the internet. You will be required to accept the terms of an online agreement and to establish and utilize a password in order to access online account services. You can sell up to and including an aggregate of $100,000 of shares per day, per Fund account through the internet if you qualify for internet orders.

Wire Transactions

You may buy (or redeem) Class A, Class B (redemptions only), Class C, Class T, Class W (redemptions only), Class Y and Class Z shares of a Fund by wiring money from (or to) your bank account to (or from) your Fund account by calling the Transfer Agent at 800.422.3737. You must set up this feature prior to your request unless you are submitting your request in writing with a Medallion Signature Guarantee. The Transfer Agent charges a fee for shares sold by Fedwire. The Transfer Agent may waive the fee for certain accounts. In the case of a redemption, the receiving bank may charge an additional fee. The minimum amount that can be redeemed by wire is $500. The maximum amount that can be redeemed over the telephone is $3 million per day, per Fund account.

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Electronic Funds Transfer

You may buy (or redeem) Class A, Class B (redemptions only), Class C, Class T, Class Y and Class Z shares of a Fund by electronically transferring money from (or to) your bank account to (or from) your Fund account by calling the Transfer Agent at 800.422.3737. An electronic funds transfer may take up to three business days to settle and be considered in “good form.” You must set up this feature by contacting the Transfer Agent prior to your request to obtain any necessary forms.

Important: Payments sent by an electronic fund transfer, a bank authorization, or check that are not guaranteed may take up to 10 or more days to clear. If you request a redemption before the purchase funds clear, this may cause your redemption request to fail to process if the requested amount includes unguaranteed funds. If you purchased your shares by check or from your bank account as an ACH transaction, the Fund may hold the redemption proceeds when you sell those shares for a period of time after the trade date of the purchase.

Buying Shares

Eligible Investors

Class A and Class C Shares

Class A and Class C shares are available to the general public for investment. Once you have opened an account, you can buy Class A and Class C shares in a lump sum, through our Systematic Investment Plan, by dividend diversification, by wire or by electronic funds transfer.

For Columbia Money Market Fund, new investments must be made in Class A, Class I, Class W or Class Z shares, subject to eligibility. Class C and Class R shares of Columbia Money Market Fund are available as a new investment only to investors in the Distributor's proprietary 401(k) products, provided that such investor is eligible to invest in the class and transacts directly with the Fund or the Transfer Agent through a third party administrator or third party recordkeeper. Columbia Money Market Fund offers other classes of shares only to facilitate exchanges with other Funds offering these classes of shares.

Class B Shares (Closed)

The Funds no longer accept investments from new or existing investors in Class B shares, except for certain limited transactions involving existing investors in Class B shares as described in more detail below.

Additional Class B shares will be issued only to existing investors in Class B shares and only through the following two types of transactions (Qualifying Transactions):

■	Dividend and/or capital gain distributions may continue to be reinvested in Class B shares of a Fund.
■	Shareholders invested in Class B shares of a Fund may exchange those shares for Class B shares of other Funds offering such shares. Certain exceptions apply, including that not all Funds may permit exchanges.

Any initial purchase orders for the Fund's Class B shares will be rejected (other than through a Qualifying Transaction that is an exchange transaction).

Unless contrary instructions are received in advance by the Fund, any purchase orders (except those submitted by a selling agent through the National Securities Clearing Corporation (NSCC) as described in more detail below) that are orders for additional Class B shares of the Fund received from existing investors in Class B shares, including orders made through an active systematic investment plan, will automatically be invested in Class A shares of the Fund, without regard to the normal minimum initial investment requirement for Class A shares, but subject to the front-end sales charge that generally applies to Class A shares. See Choosing a Share Class — Sales Charges and Commissions — Class A Shares — Front-End Sales Charge for additional information. Your selling agent may have different policies not described here, including a policy to reject purchase orders for a Fund's Class B shares or to automatically invest the purchase amount in Columbia Money Market Fund. Please consult your selling agent to understand its policy.

Additional purchase orders for a Fund's Class B shares by an existing Class B shareholder, submitted by such shareholder's selling agent through the NSCC, will be rejected due to operational limitations of the NSCC. Investors should consult their selling agent if they wish to invest in the Fund by purchasing a share class of the Fund other than Class B shares.

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Dividend and/or capital gain distributions from Class B shares of a Fund will not be automatically invested in Class B shares of another Fund. Unless contrary instructions are received in advance of the date of declaration, such dividend and/or capital gain distributions from Class B shares of a Fund will be reinvested in Class B shares of the same Fund that is making the distribution.

Class I Shares

Class I shares are available only to the Funds (i.e., fund-of-funds investments).

Class K Shares (Closed)

Class K shares are closed to new investors and new accounts, subject to certain limited exceptions described below.

Shareholders who opened and funded a Class K account with the Fund as of the close of business on December 31, 2010 (including accounts once funded that subsequently reached a zero balance) may continue to make additional purchases of Class K shares. Plans may continue to make additional purchases of Fund shares and add new participants, and new plans sponsored by the same or an affiliated sponsor may invest in the Fund (and add new participants) if an initial plan so sponsored invested in the Fund as of December 31, 2010 (or had approved the Fund as an investment option as of December 31, 2010 and funded its initial account with the Fund prior to March 31, 2011) and holds Fund shares at the plan level.

An order to purchase Class K shares received by the Fund or the Transfer Agent after the close of business on December 31, 2010 (other than as described above) from a new investor or a new account that is not eligible to purchase shares will be refused by the Fund and the Transfer Agent and any money that the Fund or the Transfer Agent received with the order will be returned to the investor or the selling agent, as appropriate, without interest.

Class K shares are designed for qualified employee benefit plans, trust companies or similar institutions, charitable organizations that meet the definition in Section 501(c)(3) of the Internal Revenue Code, non-qualified deferred compensation plans whose participants are included in a qualified employee benefit plan described above, state sponsored college savings plans established under Section 529 of the Internal Revenue Code, and health savings accounts created pursuant to public law 108-173. Class K shares may be purchased, sold or exchanged only through the Distributor or an authorized selling agent.

Prior to October 25, 2012, Class K shares were named Class R4 shares.

Class R Shares

Class R shares are available only to eligible health savings accounts sponsored by third party platforms, including those sponsored by Ameriprise Financial affiliates, eligible retirement plans and, in the sole discretion of the Distributor, other types of retirement accounts held through platforms maintained by selling agents approved by the Distributor. Eligible retirement plans include any retirement plan other than individual 403(b) plans. Class R shares are generally not available for investment through retail nonretirement accounts, traditional and Roth IRAs, Coverdell Education Savings Accounts, SEPs, SAR-SEPs, Simple IRAs or 529 tuition programs. Contact the Transfer Agent or your retirement plan or health savings account administrator for more information about investing in Class R shares.

Class R4 Shares

Class R4 shares are available only to (i) omnibus retirement plans, (ii) trust companies or similar institutions, (iii) broker-dealers, banks, trust companies and similar institutions that clear Fund share transactions for their client or customer investment advisory or similar accounts through designated selling agents and their mutual fund trading platforms that have been granted specific written authorization from the Transfer Agent with respect to Class R4 eligibility apart from selling, servicing or similar agreements, (iv) 501(c)(3) charitable organizations, (v) 529 plans and (vi) health savings accounts.

Prior to October 31, 2012, Class R4 shares were named Class R3 shares.

Class R5 Shares

Class R5 shares are available only to (i) certain registered investment advisers that clear Fund share transactions for their client or customer accounts through designated selling agents and their mutual fund trading platforms that have been granted specific written authorization from the Transfer Agent with respect to Class R5 eligibility apart from selling, servicing or similar agreements and (ii) omnibus retirement plans. Prior to November 8, 2012, Class R5 shares were closed to new investors and new accounts, subject to certain exceptions. Existing shareholders who do not satisfy the new eligibility requirements for investment in Class R5 may not establish new Class R5 accounts but may continue to make additional purchases of Class R5 shares in

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accounts opened and funded prior to November 8, 2012; provided, however, that investment advisory programs and similar programs that opened a Class R5 account as of May 1, 2010, and continuously hold Class R5 shares in such account after such date, may generally not only continue to make additional purchases of Class R5 shares but also open new Class R5 accounts for such pre-existing programs and add new shareholders in the program.

Class T Shares

Class T shares are available only to investors who received (and who have continuously held) Class T shares in connection with the merger of certain Galaxy funds into various Legacy Columbia Funds (formerly named Liberty funds).

Class W Shares

Class W shares are available only to investors purchasing through authorized investment programs managed by investment professionals, including discretionary managed account programs. Class W shares may be purchased, sold or exchanged only through the Distributor or an authorized selling agent. Shares originally purchased in a discretionary managed account may continue to be held in Class W outside of a discretionary managed account, but no additional Class W purchases may be made and no exchanges to Class W shares of another Fund may be made outside of a discretionary managed account.

Class Y Shares

Class Y shares, except as noted below, are available only to (i) omnibus retirement plans with plan assets of at least $10 million as of the date of funding the Fund account (without a minimum initial investment amount) and (ii) omnibus retirement plans with plan assets of less than $10 million as of the date of funding the Fund account, provided that such plans invest $500,000 or more in Class Y shares of the Fund. As with other minimum initial investment requirements, the Distributor may, in its sole discretion, waive the minimum initial investment requirement for Class Y shares.

Prior to November 8, 2012, Class Y shares were offered only to certain former shareholders of series of the former Columbia Funds Institutional Trust (together, Former CFIT Shareholders). Former CFIT Shareholders who opened and funded a Class Y account with a Fund as of the close of business on November 7, 2012 may continue to make additional purchases of Class Y shares even if they do not satisfy the current eligibility requirements but may not establish new Class Y shares accounts and will not be eligible to exchange Class Y shares of a Fund into Class Y shares of other Funds. Former CFIT Shareholders may exchange Class Y shares of a Fund for Class Z shares of the same Fund or Class Z shares of another Fund, subject to applicable minimum investments.

Class Z Shares

Class Z shares are available only to the categories of eligible investors described below under Class Z Shares Minimum Initial Investments. Effective March 29, 2013, selling agents that clear Fund share transactions through designated selling agents and their mutual fund trading platforms that have been given specific written notice from the Transfer Agent of the termination of their eligibility for new purchases of Class Z shares and omnibus retirement plans are not permitted to establish new Class Z accounts, subject to certain exceptions described below.

Omnibus retirement plans that opened and, subject to certain exceptions, funded a Class Z account with the Fund as of the close of business on March 28, 2013, and continuously hold Class Z shares in such account after March 28, 2013, may generally continue to make additional purchases of Class Z shares, open new Class Z accounts and add new participants. In addition, an omnibus retirement plan affiliated with a grandfathered plan may, in the sole discretion of the Distributor, open new Class Z accounts in a Fund after March 28, 2013 if the affiliated plan opened a Class Z account on or before March 28, 2013. If an omnibus retirement plan invested in Class Z shares changes recordkeepers after March 28, 2013, any new accounts established for that plan may not be established in Class Z shares, but such a plan may establish new accounts in a different share class for which the plan is eligible. The Distributor may, in its sole discretion, delay the funding requirement described above for omnibus retirement plans to allow an omnibus retirement plan that opened a Class Z account (the initial Class Z account) with the Fund as of the close of business on March 28, 2013 to make additional purchases of Class Z shares, open new Class Z accounts and add new participants after March 28, 2013 so long as the initial Class Z account was funded by July 2, 2013.

Effective March 29, 2013, accounts of selling agents (other than omnibus retirement plans, which are discussed above) that clear Fund share transactions for their client or customer accounts through designated selling agents and their mutual fund trading platforms that have received specific written notice from the Transfer Agent of the termination of their eligibility for new

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Buying, Selling and Exchanging Shares (continued)

purchases of Class Z shares will not be permitted to establish new Class Z accounts or make additional purchases of Class Z shares (other than through reinvestment of distributions). Effective March 29, 2013, such accounts may, at their holder’s option, exchange Class Z shares of a Fund, without the payment of a sales charge, for Class A shares of the same Fund.

Additional Eligible Investors

In addition, the Distributor, in its sole discretion, may accept investments in any share class from investors other than those listed in this prospectus.

Minimum Initial Investments

The table below shows the Fund's minimum initial investment requirements, which may vary by Fund, class and type of account.

Minimum Initial Investments
	Minimum Initial Investment^(a)	Minimum Initial Investment for Accounts with Systematic Investment Plans
For all Funds, classes and account types except those listed below	$2,000	$100 ^(b)
Individual Retirement Accounts for all Funds and classes except those listed below	$1,000	$100 ^(c)
Columbia Absolute Return Currency and Income Fund and Columbia Absolute Return Emerging Markets Macro Fund	$10,000	$10,000
Columbia Floating Rate Fund and Columbia Inflation Protected Securities Fund	$5,000	$5,000
Class I, Class K, Class R and Class R4	None	None
Class R5	variable ^(d)	N/A
Class W	$500	N/A
Class Y	variable ^(e)	N/A
Class Z	variable ^(f)	$100

(a)	If your Class A, Class B, Class C, Class T or Class Z shares account balance falls below the minimum initial investment amount for any reason, including a market decline, you may be asked to increase it to the minimum initial investment amount or establish a monthly Systematic Investment Plan. If you do not do so, your account will be subject to a $20 annual low balance fee and/or shares may be automatically redeemed and the proceeds mailed to you if the account falls below the minimum account balance. See Buying, Selling and Exchanging Shares — Transaction Rules and Policies above.
(b)	Columbia Money Market Fund — $2,000
(c)	Columbia Money Market Fund — $1,000
(d)	There is no minimum initial investment in Class R5 shares for omnibus retirement plans. A minimum initial investment of $100,000 applies to aggregate purchases of Class R5 shares of a Fund for combined underlying accounts of any registered investment adviser that clears Fund share transactions for their client or customer accounts through designated selling agents and their mutual fund trading platforms that have been granted specific written authorization from the Transfer Agent with respect to Class R5 eligibility apart from selling, servicing or similar agreements.
(e)	There is no minimum initial investment in Class Y shares for omnibus retirement plans with plan assets of at least $10 million as of the date of funding the Fund account. The minimum initial investment in Class Y shares for omnibus retirement plans with plan assets of less than $10 million as of the date of funding is $500,000.
(f)	The minimum initial investment amount for Class Z shares is $0, $1,000 or $2,000 depending upon the category of eligible investor. See — Class Z Shares Minimum Initial Investments below. The minimum initial investment amount for systematic investment plan accounts is the same as the amount set forth in the first four rows of the table, as applicable.

The minimum initial investment requirements may be waived for accounts that are managed by an investment professional, for accounts held in approved discretionary or non-discretionary wrap programs, or for accounts that are a part of an employer-sponsored retirement plan. The Distributor, in its sole discretion, may also waive minimum initial investment requirements for other account types.

Minimum investment and related requirements may be modified at any time, with or without prior notice. If your account is closed and then re-opened with a systematic investment plan, your account must meet the then-current applicable minimum initial investment.

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Class Z Shares Minimum Initial Investments

There is no minimum initial investment in Class Z shares for the following categories of eligible investors:

■	Any person investing all or part of the proceeds of a distribution, rollover or transfer of assets into a Columbia Management Individual Retirement Account, from any deferred compensation plan which was a shareholder of any of the Funds of Columbia Acorn Trust on September 29, 2000, in which the investor was a participant and through which the investor invested in one or more of the Funds of Columbia Acorn Trust immediately prior to the distribution, transfer or rollover.
■	Any health savings account sponsored by a third party platform.
■	Any investor participating in a wrap program sponsored by a selling agent or other entity that is paid an asset-based fee by the investor and that is not compensated by the Fund for those services, other than payments for shareholder servicing or sub-accounting performed in place of the Transfer Agent.

The minimum initial investment in Class Z shares for the following categories of eligible investors is $1,000:

■

Any individual retirement plan for which a selling agent or other entity provides services and is not compensated by the Fund for those services, other than in the form of payments for shareholder servicing or sub-accounting performed in place of the Transfer Agent.

■

Any employee of Columbia Management Investment Advisers, LLC, the Distributor or the Transfer Agent and immediate family members of any of the foregoing who share the same address and any persons employed as of April 30, 2010 by the Legacy Columbia Funds' former investment manager, distributor or transfer agent and immediate family members of any of the foregoing who share the same address are eligible to make new and subsequent purchases in Class Z shares through an individual retirement account. If you maintain your account with a selling agent, you must contact that selling agent each time you seek to purchase shares to notify them that you qualify for Class Z shares.

The minimum initial investment in Class Z shares for the following categories of eligible investors is $2,000:

■	Any shareholder (as well as any family member of a shareholder or person listed on an account registration for any account of the shareholder) of another fund distributed by the Distributor (i) who holds Class Z shares; (ii) who held Primary A shares prior to the share class redesignation of Primary A shares as Class Z shares that occurred on August 22, 2005; (iii) who holds Class A shares that were obtained by an exchange of Class Z shares; or (iv) who bought shares of certain mutual funds that were not subject to sales charges and that merged with a Legacy Columbia Fund distributed by the Distributor.
■	Any investor participating in an account offered by a selling agent or other entity that provides services to such an account, is paid an asset-based fee by the investor and is not compensated by the Fund for those services, other than payments for shareholder servicing or sub-accounting performed in place of the Transfer Agent (each investor buying shares through a financial intermediary must independently satisfy the minimum investment requirement noted above).
■	Any institutional investor who is a corporation, partnership, trust, foundation, endowment, institution, government entity, or similar organization, which meets the respective qualifications for an accredited investor, as defined under the Securities Act of 1933.
■	Certain financial institutions and intermediaries, such as insurance companies, trust companies, banks, endowments, investment companies or foundations, buying shares for their own account, including Ameriprise Financial and its affiliates and/or subsidiaries.
■	Any employee of Columbia Management Investment Advisers, LLC, the Distributor or the Transfer Agent and immediate family members of any of the foregoing who share the same address and any persons employed as of April 30, 2010 by the Legacy Columbia Funds' former investment manager, distributor or transfer agent and immediate family members of any of the foregoing who share the same address are eligible to make new and subsequent purchases in Class Z shares through a non-retirement account. If you maintain your account with a selling agent, you must contact that selling agent each time you seek to purchase shares to notify them that you qualify for Class Z shares.
■	Certain other investors as set forth in more detail in the SAI.

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Systematic Investment Plan

The Systematic Investment Plan allows you to schedule regular purchases via automatic transfers from your bank account to the Fund on a monthly, quarterly or semiannual basis. Contact the Transfer Agent or your selling agent to set up the plan. Systematic Investment Plans may not be available for all share classes.

Dividend Diversification

Generally, you may automatically invest distributions made by another Fund into the same class of shares (and in some cases certain other classes of shares) of a Fund at no additional sales charge. A sales charge may apply when you invest distributions made with respect to shares that were not subject to a sales charge at the time of your initial purchase. Call the Transfer Agent at 800.345.6611 for details. The ability to invest distributions from one Fund to another Fund may not be available to accounts held at all selling agents.

Other Purchase Rules You Should Know

■	Once the Transfer Agent or your selling agent receives your buy order in “good form,” your purchase will be made at the next calculated public offering price per share, which is the net asset value per share plus any sales charge that applies.
■	You generally buy Class A and Class T shares at the public offering price per share because purchases of these share classes are generally subject to a front-end sales charge.
■	You buy Class B, Class C, Class I, Class K, Class R, Class R4, Class R5, Class W, Class Y and Class Z shares at net asset value per share because no front-end sales charge applies to purchases of these share classes.
■	The Distributor and the Transfer Agent reserve the right to cancel your order if the Fund doesn't receive payment within three business days of receiving your buy order. The Fund will return any payment received for orders that have been cancelled, but no interest will be paid on that money.
■	Selling agents are responsible for sending your buy orders to the Transfer Agent and ensuring that we receive your money on time.
■	Shares purchased are recorded on the books of the Fund. The Fund doesn't issue certificates.

Selling Shares

When you sell your shares, the Fund is effectively buying them back from you. This is called a redemption. The payment will be sent within seven days after your request is received in “good form.” When you sell shares, the amount you receive may be more or less than the amount you invested.

Your sale price will be the next NAV calculated after your request is received in “good form,” minus any applicable CDSC.

Systematic Withdrawal Plan

The Systematic Withdrawal Plan allows you to schedule regular redemptions from your account any business day on a monthly, quarterly or semiannual basis. Currently, Systematic Withdrawal Plans are generally available for Class A, Class B, Class C, Class R4, Class R5, Class T, Class W, Class Y and Class Z share accounts. Contact the Transfer Agent or your financial advisor to set up the plan. To set up the plan, your account balance must meet the class minimum initial investment amount. All dividend and capital gain distributions must be reinvested to set up the plan. A Systematic Withdrawal Plan cannot be set up on an account that already has a Systematic Investment Plan established. If you set up the plan after you've opened your account, we may require your signature to be Medallion Signature Guaranteed.

You can choose to receive your withdrawals via check or direct deposit into your bank account. The Fund will deduct any applicable CDSC from the withdrawals before sending the balance to you. You can cancel the plan by giving the Fund 30 days’ notice in writing or by calling the Transfer Agent at 800.422.3737. It’s important to remember that if you withdraw more than your investment in the Fund is earning, you'll eventually withdraw your entire investment.

Check Redemption Service (for Columbia Money Market Fund)

Class A and Class Z shares of Columbia Money Market Fund offer check writing privileges. If you have $2,000 in Columbia Money Market Fund, you may request checks which may be drawn against your account. The amount of any check drawn against your Columbia Money Market Fund must be at least $100. You can elect this service on your initial application or

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thereafter. Call 800.345.6611 for the appropriate forms to establish this service. If you own Class A shares that were originally purchased in another Fund at NAV because of the size of the purchase, and then exchanged into Columbia Money Market Fund, check redemptions may be subject to a CDSC. A $15 charge will be assessed for any stop payment order requested by you or any overdraft in connection with checks written against your Columbia Money Market Fund account. Note that a Medallion Signature Guarantee may be required if this service is established after the account is opened.

In-Kind Redemptions

The Fund reserves the right to honor redemption orders with in-kind distributions of portfolio securities instead of cash. In the event the Fund distributes portfolio securities in-kind, you may incur brokerage and transaction costs associated with converting the portfolio securities you receive into cash. Also, the portfolio securities you receive may increase or decrease in value before you convert them into cash. For U.S. federal income tax purposes redemptions paid in securities are generally treated the same as redemptions paid in cash.

Other Redemption Rules You Should Know

■	Once the Transfer Agent or your selling agent receives your redemption order in “good form,” your shares will be sold at the next calculated NAV per share. Any applicable CDSC will be deducted from the amount you're selling and the balance will be remitted to you.
■	If you sell your shares that are held directly with the Funds (through the Transfer Agent), we will normally send the redemption proceeds by mail or electronically transfer them to your bank account within three business days after the Transfer Agent or your selling agent receives your order in “good form.”
■	If you sell your shares through a selling agent, the Funds will normally send the redemption proceeds by Fedwire within three business days after the Transfer Agent or your selling agent receives your order in “good form.”
■	If you paid for your shares by check or from your bank account as an ACH transaction, the Funds will hold the redemption proceeds when you sell those shares for a period of time after the trade date of the purchase.
■	No interest will be paid on uncashed redemption checks.
■	The Funds can delay payment of the redemption proceeds for up to seven days and may suspend redemptions and/or further postpone payment of redemption proceeds when the NYSE is closed or trading thereon is restricted or during emergency or other circumstances, including as determined by the SEC.
■	Other restrictions may apply to retirement accounts. For information about these restrictions, contact your retirement plan administrator.
■	The Fund reserves the right to redeem your shares if your account falls below the Fund's minimum initial investment requirement.
■	Also keep in mind the Funds' Small Account Policy, which is described above in Buying, Selling and Exchanging Shares — Transaction Rules and Policies.

Exchanging Shares

You can generally sell shares of your Fund to buy shares of another Fund, in what is called an exchange. You should read the prospectus of, and make sure you understand the investment objective, principal investment strategies, risks, fees and expenses of, the Fund into which you are exchanging.

You may be subject to a sales charge if you exchange from Columbia Money Market Fund or any other Fund that does not charge a front-end sales charge into a non-money market Fund. If you hold your Fund shares through certain selling agents, including Ameriprise Financial Services, Inc., you may have limited exchangeability among the Funds. Please contact your selling agent for more information.

You can generally make exchanges between like share classes of any Fund and, subject to eligibility requirements, other share classes of any Fund. Some exceptions apply. Although the Funds allow certain exchanges from one share class to another share class with higher expenses, you should consider the expenses of each class before making such an exchange.

Prospectus 2014

Columbia Diversified Real Return Fund

Buying, Selling and Exchanging Shares (continued)

Systematic Exchanges

You may buy Class A, Class C, Class T, Class W, Class Y and/or Class Z shares of a Fund by exchanging each month from another Fund for shares of the same class of the Fund at no additional cost, subject to the following exchange amount minimums: $50 each month for individual retirement accounts (i.e. tax qualified accounts); and $100 each month for non-retirement accounts. Contact the Transfer Agent or your selling agent to set up the plan. If you set up your plan to exchange more than $100,000 each month, you must obtain a Medallion Signature Guarantee.

Exchanges will continue as long as your balance is sufficient to complete the systematic monthly transfers, subject to the Funds' Small Account Policy described above in Buying, Selling and Exchanging Shares — Transaction Rules and Policies. You may terminate the program or change the amount you would like to exchange (subject to the $50 and $100 minimum requirements noted immediately above) by calling the Transfer Agent at 800.345.6611. A sales charge may apply when you exchange shares of a Fund that were not assessed a sales charge at the time of your initial purchase.

Other Exchange Rules You Should Know

■	Exchanges are made at the NAV next calculated after your exchange order is received in “good form.”
■	Once the Fund receives your exchange request, you cannot cancel it after the market closes.
■	The rules for buying shares of a Fund generally apply to exchanges into that Fund, including, if your exchange creates a new Fund account, it must satisfy the minimum investment amount, unless a waiver applies.
■	Shares of the purchased Fund may not be used on the same day for another exchange or sale.
■	If you exchange shares from Class A shares of Columbia Money Market Fund to a non-money market Fund, any further exchanges must be between shares of the same class. For example, if you exchange from Class A shares of Columbia Money Market Fund into Class C shares of a non-money market Fund, you may not exchange from Class C shares of that non-money market Fund back to Class A shares of Columbia Money Market Fund.
■	A sales charge may apply when you exchange shares of a Fund that were not assessed a sales charge at the time of your initial purchase. For example, if your initial investment was in Columbia Money Market Fund and you exchange into a non-money market Fund, your transaction is subject to a front-end sales charge if you exchange into Class A shares and to a CDSC if you exchange into Class C shares of the Funds.
■	If your initial investment was in Class A shares of a non-money market Fund and you exchange shares into Columbia Money Market Fund, you may exchange that amount to another Fund, including dividends earned on that amount, without paying a sales charge.
■	If your shares are subject to a CDSC, you will not be charged a CDSC upon the exchange of those shares. Any CDSC will be deducted when you sell the shares you received from the exchange. The CDSC imposed at that time will be based on the period that begins when you bought shares of the original Fund and ends when you sell the shares of the Fund you received from the exchange. The applicable CDSC will be the CDSC of the original Fund.
■	You may make exchanges only into a Fund that is legally offered and sold in your state of residence. Contact the Transfer Agent or your selling agent for more information.
■	You generally may make an exchange only into a Fund that is accepting investments.
■	The Fund may change or cancel your right to make an exchange by giving the amount of notice required by regulatory authorities (generally 60 days for a material change or cancellation).
■	Unless your account is part of a tax-advantaged arrangement, an exchange for shares of another Fund is a taxable event, and you may recognize a gain or loss for tax purposes.
■	Changing your investment to a different Fund will be treated as a sale and purchase, and you will be subject to applicable taxes on the sale and sales charges on the purchase of the new Fund.
■	Class Z shares of a Fund may be exchanged for Class A or Class Z shares of another Fund. In certain circumstances, the front-end sales charge applicable to Class A shares may be waived on exchanges of Class Z shares for Class A shares. See Buying, Selling and Exchanging Shares — Buying Shares — Eligible Investors — Class Z Shares for details.

58	Prospectus 2014

Columbia Diversified Real Return Fund

Buying, Selling and Exchanging Shares (continued)

■	You may generally exchange Class T shares of a Fund for Class A shares of another Fund if the other Fund does not offer Class T shares. Class T shares exchanged into Class A shares cannot be exchanged back into Class T shares.
■	Class W shares originally purchased, but no longer held, in a discretionary managed account, may not be exchanged for Class W shares of another Fund.
■	Former CFIT Shareholders may not exchange Class Y shares of a Fund into Class Y shares of another Fund.

Same-Fund Exchange Privilege

Certain shareholders of a Fund may be or become eligible to invest in other classes of shares of the same Fund. Upon a determination of such eligibility, such shareholders may be eligible to exchange their shares for shares of the other share class, if offered. Such exchanges include exchanges of shares of one class for shares of another share class with higher expenses. Before making such an exchange, you should consider the expenses of each class. Investors should contact their selling agents to learn more about the details of the exchange privilege.

Note the following rules relating to same-Fund exchanges:

■	No sales charges or other charges will apply to any such exchange, except that when Class B shares are exchanged, any CDSC applicable to Class B shares will be applied.
■	Ordinarily, shareholders will not recognize a gain or loss for U.S. federal income tax purposes upon such an exchange. You should consult your tax advisor about your particular exchanges.

Prospectus 2014

Columbia Diversified Real Return Fund

Distributions and Taxes

Distributions to Shareholders

A mutual fund can make money two ways:

■

It can earn income on its investments. Examples of fund income are interest paid on money market instruments and bonds, and dividends paid on common stocks.

■

A mutual fund can also have capital gains if the value of its investments increases. While a fund continues to hold an investment, any gain is generally unrealized. If the fund sells an investment, it generally will realize a capital gain if it sells that investment for a higher price than its adjusted cost basis, and will generally realize a capital loss if it sells that investment for a lower price than its adjusted cost basis. Capital gains and losses are either short-term or long-term, depending on whether the fund holds the securities for one year or less (short-term) or more than one year (long-term).

FUNDamentals

Distributions

Mutual funds make payments of fund earnings to shareholders, distributing them among all shareholders of the fund. As a shareholder, you are entitled to your portion of a fund's distributed income, including capital gains. Reinvesting your distributions buys you more shares of a fund — which lets you take advantage of the potential for compound growth. Putting the money you earn back into your investment means it, in turn, may earn even more money. Over time, the power of compounding has the potential to significantly increase the value of your investment. There is no assurance, however, that you'll earn more money if you reinvest your distributions rather than receive them in cash.

The Fund intends to pay out, in the form of distributions to shareholders, a sufficient amount of its income and gains so that the Fund will qualify for treatment as a regulated investment company and generally will not have to pay any federal excise tax. The Fund generally intends to distribute any net realized capital gain (whether long-term or short-term gain) at least once a year. Normally, the Fund will declare and pay distributions of net investment income according to the following schedule:

Declaration and Distribution Schedule
Declarations	Monthly
Distributions	Monthly

The Fund may, however, declare or pay distributions of net investment income more frequently.

Different share classes of the Fund usually pay different net investment income distribution amounts, because each class has different expenses. Each time a distribution is made, the net asset value per share of the share class is reduced by the amount of the distribution.

The Fund generally pays cash distributions within five business days after the distribution was declared (or, if the Fund declares distributions daily, within five business days after the end of the month in which the distribution was declared). If you sell all of your shares after the record date, but before the payment date, for a distribution, you'll normally receive that distribution in cash within five business days after the sale was made.

The Fund will automatically reinvest distributions in additional shares of the same share class of the Fund unless you inform us you want to receive your distributions in cash (the selling agent through which you purchased shares may have different policies). You can do this by contacting the Funds at the addresses and telephone numbers listed at the beginning of the section entitled Choosing a Share Class. No sales charges apply to the purchase or sale of such shares.

For accounts held directly with the Transfer Agent, distributions of $10 or less will automatically be reinvested in additional Fund shares only. If you elect to receive distributions by check and the check is returned as undeliverable, all subsequent distributions will be reinvested in additional shares of the Fund.

Unless you are a tax-exempt investor or holding Fund shares through a tax-advantaged account (such as a 401(k) plan or IRA), you should consider avoiding buying Fund shares shortly before the Fund makes a distribution (other than distributions of net investment income that are declared daily) of net investment income or net realized capital gain, because doing so can cost you money in taxes to the extent the distribution consists of taxable income or gains. This is because you will, in effect, receive part

60	Prospectus 2014

Columbia Diversified Real Return Fund

Distributions and Taxes (continued)

of your purchase price back in the distribution. This is known as “buying a dividend.” To avoid “buying a dividend,” before you invest check the Fund's distribution schedule, which is available at the Funds' website and/or by calling the Funds' telephone number listed at the beginning of the section entitled Choosing a Share Class.

Taxes

You should be aware of the following considerations applicable to all Funds (unless otherwise noted):

■	The Fund intends to qualify each year as a regulated investment company. A regulated investment company generally is not subject to tax at the fund level on income and gains from investments that are distributed to shareholders. However, the Fund's failure to qualify as a regulated investment company would result in Fund level taxation, and consequently, a reduction in income available for distribution to you and in the net asset value of your shares. Even if a fund qualifies as a regulated investment company, the Fund may be subject to federal excise tax on certain undistributed income or gains. For tax-exempt Funds: If a tax-exempt Fund were to fail to qualify as a regulated investment company, any dividends of net tax-exempt income would no longer be exempt from U.S. federal income tax and, instead, in general, would be taxable to you as ordinary income.
■	Distributions generally are taxable to you when paid, whether they are paid in cash or automatically reinvested in additional Fund shares. However, dividends paid in January are taxable on December 31 of the prior year if the dividend was declared and payable to shareholders of record in October, November, or December of the prior year. In certain circumstances a Fund may retain its net capital gain and deem such gains to have been distributed to shareholders. In such case, the Fund will be required to pay a fund-level tax on any such retained net capital gain, which will be deemed paid by the shareholder.
■	Distributions of the Fund's ordinary income and net short-term capital gain, if any, generally are taxable to you as ordinary income. Distributions of the Fund's net long-term capital gain, if any, generally are taxable to you as long-term capital gain. Whether capital gains are long-term or short-term is determined by how long the Fund has owned the investments that generated them, rather than how long you have owned your shares. For taxable fixed income Funds: The Fund expects that distributions will consist primarily of ordinary income.
■	From time to time, a distribution from the Fund could constitute a return of capital, which is not taxable to you so long as the amount of the distribution does not exceed your tax basis in your Fund shares. A return of capital reduces your tax basis in your Fund shares, with any amounts exceeding such basis generally taxable as capital gain.
■	If you are an individual and you meet certain holding period and other requirements for your Fund shares, a portion of your distributions may be treated as “qualified dividend income” taxable at the lower net long-term capital gain rates instead of the higher ordinary income rates. Qualified dividend income is income attributable to the Fund's dividends received from certain U.S. and foreign corporations, as long as the Fund meets certain holding period and other requirements for the stock producing such dividends. For taxable fixed income and tax-exempt Funds: The Fund does not expect a significant portion of Fund distributions to be qualified dividend income.
■	Certain high-income individuals (as well as estates and trusts) are subject to a 3.8% tax on net investment income. For individuals, the 3.8% tax applies to the lesser of (1) the amount (if any) by which the taxpayer's modified adjusted gross income exceeds certain threshold amounts or (2) the taxpayer's “net investment income.” Net investment income generally includes for this purpose dividends, including any capital gain dividends, paid by the Fund, and net capital gains recognized on the sale, redemption or exchange of shares of the Fund. For tax-exempt Funds: Exempt interest dividends are not included in net investment income for this purpose, and are therefore not subject to the tax on net investment income.
■	Certain derivative instruments when held in a Fund's portfolio subject the Fund to special tax rules, the effect of which may be to, among other things, accelerate income to the Fund, defer Fund losses, cause adjustments in the holding periods of Fund portfolio securities, or convert capital gains into ordinary income, short-term capital losses into long-term capital losses or long-term capital gains into short-term capital gains. These rules could therefore affect the amount, timing and/or character of distributions to shareholders. For tax-exempt Funds: Derivative instruments held by a Fund may also generate taxable income to the Fund.

Prospectus 2014

Columbia Diversified Real Return Fund

Distributions and Taxes (continued)

■	Certain Funds may purchase or write options, as described further in the SAI. In general, a Fund realizes a capital gain or loss on options when the option expires, is exercised, sold or otherwise terminated, unless the option is a “section 1256 contract” (including most traded options on an index), in which case each year the option is deemed to be sold at fair market value (and any gain or loss recognized, the latter subject to possible deferral) each year.
■	If at the end of the taxable year more than 50% of the value of the Fund's assets consists of securities of foreign corporations, and the Fund makes a special election, you will generally be required to include in your income for U.S. federal income tax purposes your share of the qualifying foreign income taxes paid by the Fund in respect of its foreign portfolio securities. You may be able to claim a foreign tax credit or deduction in respect of this amount, subject to certain limitations. There is no assurance that the Fund will make this election for a taxable year, even if it is eligible to do so.
■	For tax-exempt Funds: The Fund expects that distributions will consist primarily of exempt interest dividends. Distributions of the Fund's net interest income from tax-exempt securities generally are not subject to U.S. federal income tax, but may be subject to state and local income and other taxes, as well as federal and state alternative minimum tax. Similarly, distributions of interest income that is exempt from state and local income taxes of a particular state may be subject to other taxes, including income taxes of other states, and federal and state alternative minimum tax. Certain income generated by tax-exempt securities, including capital gains on sales and market discount, is taxable. The Fund may invest a portion of its assets in securities that generate income that is not exempt from federal or state income tax. Distributions by the Fund of this income generally are taxable to you as ordinary income or long-term capital gain. Distributions of capital gains realized by the Fund, including those generated from the sale or exchange of tax-exempt securities, generally also are taxable to you. Distributions of the Fund's net short-term capital gain, if any, generally are taxable to you as ordinary income.
■	For a Fund organized as a fund-of-funds: Because most of the Fund's investments are shares of underlying Funds, the tax treatment of the Fund's gains, losses, and distributions may differ from the tax treatment that would apply if either the Fund invested directly in the types of securities held by the underlying Funds or the Fund shareholders invested directly in the underlying Funds. As a result, you may receive taxable distributions earlier and recognize higher amounts of capital gain or ordinary income than you otherwise would.
■	A sale, redemption or exchange of Fund shares is a taxable event. This includes redemptions where you are paid in securities. Your sales, redemptions and exchanges of Fund shares (including those paid in securities) usually will result in a taxable capital gain or loss to you, equal to the difference between the amount you receive for your shares (or are deemed to have received in the case of exchanges) and the amount you paid (or are deemed to have paid in the case of exchanges) for them. Any such capital gain or loss generally will be long-term capital gain or loss if you have held your Fund shares for more than one year at the time of sale or exchange. In certain circumstances, capital losses may be converted from short-term to long-term; in other circumstances, capital losses may be disallowed under the “wash sale” rules.
■	The Fund is required by federal law to withhold tax on any taxable or tax-exempt distributions and redemptions proceeds paid to you (including amounts paid to you in securities and amounts deemed to be paid to you upon an exchange of shares) if: you haven’t provided a correct TIN or haven’t certified to the Fund that withholding doesn’t apply; the IRS has notified us that the TIN listed on your account is incorrect according to its records; or the IRS informs the Fund that you are otherwise subject to backup withholdings.
■	The Fund is required by federal law to withhold tax on any taxable or tax-exempt distributions and redemption proceeds paid to you (including amounts paid to you in securities and amounts deemed to be paid to you upon an exchange of shares) if: you haven't provided a correct TIN or haven't certified to the Fund that withholding doesn't apply; the IRS has notified us that the TIN listed on your account is incorrect according to its records; or the IRS informs the Fund that you are otherwise subject to backup withholding.

62	Prospectus 2014

Appendix A

The following is a brief description of the investment objectives and principal investment strategies of certain of the Underlying Funds (which are referred to as Funds in the descriptions below). The Investment Manager may add new Underlying Funds for investment or change Underlying Funds at any time. The Investment Manager does not necessarily invest Fund assets in each of the Underlying Funds listed below. Additional information regarding the Underlying Funds is available in their prospectus and SAI. This prospectus is not an offer for any of the Underlying Funds. For copies of prospectuses of the Underlying Funds, which contains this and other information, call 800.345.6611 or visit columbiamanagement.com. Read the prospectus carefully before you invest.

Columbia Commodity Strategy Fund

The Fund seeks to provide shareholders with total return.

Under normal circumstances, the Fund seeks to maintain substantial economic exposure to the performance of the commodities markets. The Fund invests, directly or indirectly, in a portfolio of commodity-linked investments, including commodity-linked futures, structured notes and/or swaps that are designed to provide exposure to the investment return of assets that trade in the commodities markets, without investing directly in physical commodities. A substantial portion of the Fund’s net assets will also be invested in a portfolio of fixed income securities rated investment-grade or, if unrated, deemed of comparable quality, which will consist primarily of: (i) U.S. Government securities, corporate debt securities, mortgage-backed securities and/or asset-backed securities; and/or (ii) shares of an affiliated money market fund. In addition to investing in these holdings for their income-producing potential, these holdings will be designated by the Fund, as necessary, to serve as collateral with respect to the Fund’s commodity-linked investments.

The Fund primarily expects to gain exposure to the commodities markets by investing up to 25% of its total assets in a wholly-owned subsidiary of the Fund organized as a company under the laws of the Cayman Islands (the Subsidiary). The Subsidiary’s commodity-linked investments are expected to produce leveraged exposure to the performance of the commodities markets. It is expected that the gross notional value of the Fund’s (including the Subsidiary’s) commodity-linked investments will be equivalent to at least 90% of the Fund’s net assets. Like the Fund, the Subsidiary will not invest directly in physical commodities. The Subsidiary also invests in investment-grade fixed income securities and shares of an affiliated money market fund for investment purposes or to serve as collateral for its commodity-linked investments. The Fund’s investment in the Subsidiary permits it to gain exposure to the commodities markets in a potentially tax-efficient manner. The Subsidiary has the same investment objective as the Fund and, like the Fund, is managed by Columbia Management Investment Advisers, LLC (Columbia Management or the Investment Manager) and subadvised by Threadneedle International Limited (Threadneedle).

Derivatives, such as futures, options, structured notes and swaps, may also be utilized to produce incremental earnings, hedge existing positions, increase market exposure and/or increase investment flexibility. Actual exposures will vary over time based on factors such as market movements and assessments of market conditions by the Fund’s portfolio managers. The Fund may engage in derivative transactions on both U.S. and foreign exchanges or in the “over-the-counter” (OTC) market.

In constructing the Fund’s fixed-income portfolio, Threadneedle seeks to identify a portfolio of investment-grade fixed income securities, generally with a dollar-weighted average portfolio duration of 1 year or less.

Columbia Floating Rate Fund

The Fund seeks to provide shareholders with a high level of current income and, as a secondary objective, preservation of capital.

Under normal market conditions, at least 80% of the Fund’s net assets (including the amount of any borrowings for investment purposes) will be invested in floating rate loans and other floating rate debt securities. These debt obligations will generally be rated non-investment grade by recognized rating agencies (similar to “high yield securities” or “junk bonds”) or, if unrated, determined to be of comparable quality.

The Fund may invest up to 25% of its net assets in foreign investments.

The Fund normally invests in senior secured floating rate loans.

Senior floating rate loans held by the Fund will generally have final maturities of nine years or less.

To the extent the Fund invests in derivative instruments, the Fund may count the value of derivative securities with floating rate loan characteristics towards its 80% policy.

A-1

Appendix A (continued)

The investment manager may also invest in other securities, including investment grade fixed income debt obligations, non-investment grade fixed income debt obligations, affiliated money market funds and certain money market instruments. For purposes of the 80% policy, money market holdings with a remaining maturity of less than 60 days will be deemed floating rate assets.

Columbia Global Inflation-Linked Bond Plus Fund

The Fund seeks to provide shareholders with total return that exceeds the rate of inflation over the long term.

Under normal circumstances, the Fund invests at least 80% of its net assets (including the amount of any borrowings for investment purposes) in inflation-linked debt securities. Inflation-linked debt securities are fixed-income securities that are structured to provide protection against inflation. These securities include bonds and other debt securities whose principal and/or interest payments are adjusted for inflation. The Fund may also invest in other debt instruments, including asset-backed and mortgage-backed securities, which may be of any maturity and may be issued by developed, developing or emerging markets issuers, including the U.S. Government, non-U.S. governments, quasi-governmental organizations, agencies, instrumentalities, supranational entities and companies. The Fund’s investments may include money market instruments and shares of an affiliated money market fund. The Fund may make these investments for their income-producing potential and they may also be designated by the Fund, as necessary, to serve as collateral with respect to the Fund’s investments in derivatives. The Fund generally invests at least 80% of its assets in debt securities rated in at least one of the three highest rating categories or, if unrated, determined to be of comparable quality. The Fund may invest up to 20% of its assets in securities that, at the time of purchase, are rated below investment grade or are unrated but determined to be of comparable quality (commonly referred to as “high yield securities” or “junk bonds”). The Fund’s dollar-weighted average maturity and duration will vary over time depending on expectations for market and economic conditions.

The Fund may also invest in reverse repurchase agreements and derivative instruments, including forward foreign currency contracts, futures (including bond futures), options on futures, and swaps (including index swaps, rate swaps, total return swaps, and TIPS asset swaps), in an effort to produce incremental earnings, to hedge existing positions, to increase market, interest rate or credit exposure, to increase investment flexibility (including by using the derivative as a substitute for the purchase or sale of the underlying security, currency or other instrument), and/or to change the effective duration of its portfolio. The Fund expects to utilize leverage, created through investments in reverse repurchase agreements and inflation rate swaps, as part of its investment strategies. Leverage has the effect of increasing the Fund’s volatility.

Under normal circumstances, the Fund invests at least 40% of its net assets in debt obligations of non-U.S. government, quasi-governmental organizations, agencies, instrumentalities and supranational entities, as well as companies that maintain their principal place of business outside the U.S.; have been formed under the laws of non-U.S. countries; trade their securities in a market located outside the U.S.; or conduct a substantial amount of business outside the U.S. The Fund considers an issuer to conduct a substantial amount of business outside the U.S. if it derives at least 50% of its revenue or profits from business outside the U.S. or has at least 50% of its sales or assets outside the U.S. This 40% minimum investment amount may be reduced to 30% if market conditions for these investments or specific foreign markets are deemed unfavorable. There is no limitation on the maturities of the instruments the Fund will invest in.

The Fund is non-diversified, which means that it can invest a greater percentage of its assets in the securities of fewer issuers than can a diversified fund.

The Fund’s investment strategy may involve the frequent trading of portfolio securities. This may cause the Fund to incur higher transaction costs (which may adversely affect the Fund’s performance) and may increase taxable distributions for shareholders.

Columbia Global Infrastructure Fund (formerly Columbia Recovery and Infrastructure Fund)

The Fund seeks to provide shareholders with long-term growth of capital.

The Fund invests in infrastructure-related securities that appear to be undervalued or that may be temporarily out of favor, but that the investment manager believes are entering a period of recovery (i.e., a period in which these infrastructure-related issuers have good prospects for growth or capital appreciation). Under normal circumstances, the Fund invests at least 80% of its net assets (including the amount of any borrowings for investment purposes) in securities (equity, fixed-income and/or other “hybrid” (convertible) securities) of infrastructure-related issuers and/or securities intended primarily to finance infrastructure-related activities. Infrastructure-related issuers are defined as U.S. or foreign companies that derive at least 50% of their

A-2

Appendix A (continued)

revenues or profits from the ownership, development, construction, operation, utilization or financing of infrastructure-related assets, or have at least 50% of the fair market value of their assets invested in infrastructure-related assets. Investments in infrastructure-related issuers may also include securities issued to finance infrastructure-related assets.

Infrastructure-related assets are the physical structures and networks which provide necessary services to society. Examples of infrastructure-related assets include transportation assets (e.g., roads, bridges, railroads, airports, seaports, tunnels), utility assets (e.g., electric transmission and distribution lines, power generation facilities, broadcast and wireless towers, gas and water distribution facilities, cable and satellite networks) and social assets (e.g., hospitals, schools, stadiums, courthouses). The Fund’s investments include issuers with a direct investment in infrastructure-related companies and in issuers that operate or utilize infrastructure-related assets (e.g., airlines, automakers, and technology companies) or issuers with indirect exposure to infrastructure-related assets (e.g., suppliers of construction materials). The Fund may also invest in securities that are intended to finance infrastructure-related activities. The Fund may invest up to 20% of its assets in securities of issuers that are not infrastructure-related, including issuers that the investment manager believes may be undervalued due to their cyclical nature, market conditions, and/or changes in the economy. The Fund’s investments can include high-yield instruments, which are investments rated below investment grade by a nationally recognized statistical rating organization, or if unrated, determined to be of comparable quality. The Fund may invest in companies that have market capitalizations of any size.

Under normal circumstances, the Fund invests at least 40% of its net assets in issuers that maintain their principal place of business or conduct their principal business activities outside the U.S., issuers that have their securities traded on non-U.S. exchanges or issuers that have been formed under the laws of non-U.S. countries (the 40% Global Investment Policy). The Fund considers an issuer to conduct its principal business activities outside the U.S. if it derives at least 50% of its revenue or profits from business outside the U.S. or has at least 50% of its sales or assets outside the U.S. From time to time, the Fund may be below this 40% level and, in such circumstances, the Fund will then endeavor to invest its assets to bring the Fund’s net assets above this 40% level, consistent with the investment manager’s view of market and other conditions and available investment opportunities. Such investments can include securities of emerging market and frontier market issuers. From time to time, the Fund may concentrate its investments in certain countries or geographic areas.

In addition to investing in individual stocks, bonds (which can include municipal securities) or other securities, the Fund may invest in publicly-traded units of master limited partnerships, real estate investment trusts (REITs) and other pooled investment vehicle and investment companies.

Columbia High Yield Bond Fund

The Fund seeks to provide shareholders with high current income as its primary objective and, as its secondary objective, capital growth.

Under normal market conditions, the Fund invests at least 80% of its net assets (including the amount of any borrowings for investment purposes) in high-yield debt instruments (commonly referred to as “junk” bonds or securities). These high yield debt instruments include corporate debt securities as well as floating rate loans rated below investment grade by a nationally recognized statistical rating organization, or if unrated, determined to be of comparable quality.

The Fund may invest up to 25% of its net assets in high yield debt instruments of foreign issuers.

Corporate debt securities in which the Fund invests are typically unsecured, with a fixed-rate of interest, and are usually issued by companies or similar entities to provide financing for their operations, or other activities.

The Fund may invest in fixed income securities of any maturity and does not seek to maintain a particular dollar-weighted average maturity. Because the Fund emphasizes high-yield investments, more emphasis is put on credit risk by the portfolio managers in selecting investments than either maturity or duration.

The Fund may invest significantly in privately placed securities that have not been registered for sale under the Securities Act of 1933 pursuant to Rule 144A (Rule 144A securities) that are determined to be liquid in accordance with procedures adopted by the Fund’s Board of Trustees.

Columbia Income Opportunities Fund

The Fund seeks to provide shareholders with a high total return through current income and capital appreciation.

A-3

Appendix A (continued)

Under normal market conditions, the Fund’s assets are invested primarily in income-producing debt securities, with an emphasis on the higher rated segment of the high-yield (junk bond) market. These income-producing debt securities include corporate debt securities as well as bank loans. The Fund will purchase only securities rated B or above, or if unrated, securities determined to be of comparable quality. If a security falls below a B rating after investment by the Fund, the Fund may continue to hold the security.

The Fund may invest up to 25% of its net assets in foreign investments. The Fund may from time to time emphasize one or more economic sectors in selecting its investments.

Columbia Inflation Protected Securities Fund

The Fund seeks to provide shareholders with total return that exceeds the rate of inflation over the long term.

Under normal market conditions, the Fund invests at least 80% of its net assets (including the amount of any borrowings for investment purposes) in inflation-protected debt securities. These securities include inflation-indexed bonds of varying maturities issued by the U.S. Government and non-U.S. governments, their agencies or instrumentalities, and U.S. and non-U.S. corporations. The Fund currently intends to focus on inflation-protected debt securities issued by the U.S. Treasury. The Fund invests only in securities rated investment grade at the time of purchase by a third-party rating agency or, if unrated, deemed to be of comparable quality. Inflation-protected securities are designed to protect the future purchasing power of the money invested in them.

The value of the bond’s principal or the interest income paid on the bond is adjusted to track changes in an official inflation measure. For example, the U.S. Treasury uses the Consumer Price Index for Urban Consumers (non seasonally adjusted) as the inflation measure. Up to 20% of the Fund’s net assets may be invested in non-inflation protected debt obligations issued by U.S. and foreign governments, their agencies and instrumentalities, as well as U.S. and foreign corporate debt obligations, mortgage and asset-backed securities and money market instruments.

The Fund may invest in derivatives, including futures, such as bond futures and interest rate futures, forward currency contracts, credit default swaps, credit default swap indexes, IOs and POs securities and dollar rolls in the “to be announced” (TBA) market for the purpose of managing portfolio duration and yield curve exposure and hedging purposes.

The Fund is a non-diversified fund.

Columbia Limited Duration Credit Fund

The Fund seeks to provide shareholders with a level of current income consistent with preservation of capital.

Under normal circumstances, the Fund invests at least 80% of its net assets (including the amount of any borrowings for investment purposes) in corporate bonds. The Fund will primarily invest in debt securities with short- and intermediate-term maturities generally similar to those included in the Fund’s benchmark index, the Barclays U.S. 1-5 Year Corporate Index (the Index). The Fund may invest up to 15% of its net assets in securities that, at the time of purchase, are rated below investment grade (commonly referred to as “high yield securities” or “junk bonds”).

The Fund may invest up to 25% of its net assets in foreign investments, including emerging markets.

A-4

Appendix A (continued)

Columbia Real Estate Equity Fund

The Fund seeks capital appreciation and above-average income by investing, under normal market conditions, at least 80% of its net assets (plus any borrowings for investment purposes) in the stocks of companies principally engaged in the real estate industry, including real estate investment trusts (REITs).

Under normal circumstances, the Fund invests at least 80% of its net assets (including the amount of any borrowings for investment purposes) in equity securities of companies principally engaged in the real estate industry, including REITs. Equity securities include, among other things, common stocks, preferred stocks and securities convertible into common and preferred stocks. A company is considered to be “principally engaged” in the real estate industry if at least 50% of its gross income or net profits are attributable to the ownership, construction, management or sale of residential, commercial or industrial real estate. The Fund may invest in equity REITs, mortgage REITs and hybrid REITs.

The Fund is non-diversified, which means that it can invest a greater percentage of its assets in the securities of fewer issuers than can a diversified fund.

The investment manager combines fundamental and quantitative analysis with risk management in identifying investment opportunities and constructing the Fund’s portfolio.

A-5

Appendix B

The ability of the Fund to meet its investment objective is directly related to its allocation among underlying funds and the ability of those underlying funds to meet their investment objectives, as well as the investment performance of the Fund other investments. The following is a brief description of certain of the principal risks associated with investment in the underlying funds in which the Fund may invest as part of their principal investment strategies. The Fund is subject directly to these risks to the extent they invest in individual securities and other instruments. Additional information regarding the principal risks associated with investment in the underlying funds is available in the applicable underlying fund’s prospectus and Statement of Additional Information. This prospectus is not an offer for any of the underlying funds.

The references in each case to the “Fund” within each of the below risks descriptions in this Appendix B refers to the underlying fund(s) that the Funds invest in.

Commodity Futures Trading Commission (CFTC) Regulatory Risk. The Fund does not qualify for an exemption from registration as a “commodity pool” under rules of the Commodity Exchange Act (the CEA). Accordingly, the Fund is a commodity pool under the CEA and the Investment Manager is registered as a “commodity pool operator” under the CEA. The Fund is subject to dual regulation by the SEC and the CFTC. Compliance with the CFTC’s regulatory requirements could increase Fund expenses, adversely affecting the Fund’s total return.

Changing Distribution Level Risk. The amount of the distributions paid by the Fund will vary and generally depends on the amount of interest income and/or dividends received by the Fund on the securities it holds. The Fund may not be able to pay distributions or may have to reduce its distribution level if the interest income and/or dividends the Fund receives from its investments decline.

Commodity-related Tax Risk. If the Fund does not appropriately limit its commodity-related investments or if such investments are re-characterized for U.S. federal income tax purposes, the Fund may be unable to qualify as a regulated investment company for one or more years, which would adversely affect the value of the Fund (and the favorable tax treatment afforded to regulated investment companies). In this event, the Fund’s Board may authorize a significant change in investment strategy or the Fund’s liquidation.

B-1

Appendix B (continued)

Derivatives Risk/Forward Foreign Currency Contracts Risk. These instruments are a type of derivative contract whereby the Fund may agree to buy or sell a country’s or region’s currency at a specific price on a specific date in the future. These contracts may fall in value (sometimes dramatically) due to foreign market downswings or foreign currency value fluctuations. The Fund’s strategy of investing in these instruments may not be successful. Investment in these instruments also subjects the Fund to counterparty risk.

B-2

Appendix B (continued)

Derivatives Risk/Inflation Rate Swaps Risk. An inflation rate swap is a derivative instrument used to transfer inflation risk from one party to another through an exchange of cash flows. In an inflation rate swap, one party pays a fixed rate on a notional principal amount, while the other party pays a floating rate linked to an inflation index, such as the Consumer Price Index (CPI). Investments in inflation rate swaps subject the Fund (and, therefore, shareholders) to risks, including hedging risk (the risk that a hedging strategy may not eliminate the risk that it is intended to offset), counterparty risk (the risk that the counterparty to the instrument will not perform or be able to perform in accordance with the terms of the instrument), and inflation risk (the risk that inflation rates may change drastically as a result of unexpected shifts in the global economy), each of which may result in significant and unanticipated losses to the Fund.

Derivatives Risk/Interest Rate Swaps Risk. Interest rate swaps can be based on various measures of interest rates, including the London Interbank Offered Rate (commonly known as LIBOR), swap rates, treasury rates and other foreign interest rates. A swap agreement can increase or decrease the volatility of the Fund's investments and its net asset value. The value of swaps, like many other derivatives, may move in unexpected ways and may result in losses for the Fund. Swaps can involve greater risks than direct investment in securities, because swaps may be leveraged, and are, among other factors, subject to counterparty risk (the risk that the counterparty to the instrument will not perform or be able to perform in accordance with the terms of the instrument), hedging and correlation risk (the risk that a hedging strategy may not eliminate the risk that it is intended to offset, including because of a lack of correlation between the swaps and the portfolio of bonds that the swaps are designed to hedge or replace), pricing risk (swaps may be difficult to value), liquidity risk (it may not be possible to liquidate a swap position at an advantageous time or price) and interest rate risk (the risk of losses attributable to changes in interest rates), each of which may result in significant and unanticipated losses to the Fund.

Derivatives Risk/Options Risk. The use of options is a highly specialized activity which involves investment techniques and risks different from those associated with ordinary portfolio securities transactions. If the Fund sells a put option, there is a risk that the Fund may be required to buy the underlying asset at a disadvantageous price. If the Fund sells a call option, there is a risk that the Fund may be required to sell the underlying asset at a disadvantageous price, and if the call option sold is not covered (for example, by owning the underlying asset), the Fund's losses are potentially unlimited. These transactions involve other risks, including counterparty risk and hedging risk.

Derivatives Risk/Swaps Risk. The use of swaps is a highly specialized activity that involves investment techniques and risks different from those associated with ordinary portfolio securities transactions. Swaps could result in losses if the underlying asset or reference does not perform as anticipated. The value of swaps, like many other derivatives, may move in unexpected ways and may result in losses for the Fund. Such transactions can have the potential for unlimited losses. Such risk is heightened in the case of short swap transactions involving short exposures. Swaps can involve greater risks than direct investment in the underlying asset, because swaps may be leveraged (creating leverage risk) and are subject to counterparty risk, hedging risk, pricing risk and liquidity risk.

Derivatives Risk/Total Return Swaps Risk. In a total return swap transaction, one party agrees to pay the other party an amount equal to the total return of a defined underlying asset (such as an equity security or basket of such securities) or a non-asset reference (such as an index) during a specified period of time. In return, the other party would make periodic payments based on a fixed or variable interest rate or on the total return from a different underlying asset or non-asset reference. Total return swaps could result in losses if the underlying asset or reference does not perform as anticipated. Such transactions can have the potential for unlimited losses. Swaps can involve greater risks than direct investment in securities, because swaps may be leveraged, and are subject to counterparty risk, pricing risk and liquidity risk, which may result in significant Fund losses.

Foreign Securities Risk. Investments in or exposure to foreign securities involve certain risks not associated with investments in or exposure to securities of U.S. companies. Foreign securities subject the Fund to the risks associated with investing in the particular country, including the political, regulatory, economic, social, diplomatic and other conditions or events occurring in the country or region, as well as risks associated with less developed custody and settlement practices. Foreign securities may be more volatile and less liquid than investments in securities of U.S. companies. The performance of the Fund may be negatively impacted by foreign currency strength or weakness relative to the U.S. dollar, particularly where the Fund invests a significant percentage of its assets in foreign securities or other assets denominated in currencies other than the U.S. dollar.

B-3

Appendix B (continued)

Impairment of Collateral Risk. The value of collateral, if any, securing a loan can decline, and may be insufficient to meet the borrower’s obligations or difficult or costly to liquidate. In addition, the Fund’s access to collateral may be limited by bankruptcy or other insolvency laws. Further, certain floating rate and other loans may not be fully collateralized and may decline in value.

Investing in Wholly-Owned Subsidiary Risk. By investing in the Subsidiary, the Fund is indirectly exposed to the risks associated with the Subsidiary’s investments. The commodity-linked investments held by the Subsidiary are similar to those that are permitted to be held by the Fund, and thus, are subject to the same risks as the Fund (which are described in this prospectus). There can be no assurance that the investment objective of the Subsidiary will be achieved. Changes in the laws of the United States and/or the Cayman Islands, under which the Fund and the Subsidiary, respectively, are organized, could result in the inability of the Fund and/or the Subsidiary to operate as described in this prospectus and the Fund’s Statement of Additional Information (SAI) and could adversely affect the Fund and its shareholders.

Leverage Risk. Leverage occurs when the Fund increases its assets available for investment using borrowings, derivatives, or similar instruments or techniques. The use of leverage may make any change in the Fund's NAV even greater and thus result in increased volatility of returns. Leverage can create an interest expense that may lower the Fund's overall returns. Leverage presents the opportunity for increased net income and capital gains, but also exaggerates the Fund's risk of loss. There can be no guarantee that a leveraging strategy will be successful.

B-4

Appendix B (continued)

restrictions on resale, may trade infrequently, and their value may be impaired when the Fund needs to liquidate such loans. Loans and other securities may trade only in the over-the-counter market rather than on an organized exchange and may be more difficult to purchase or sell at a fair price, which may have a negative impact on the Fund’s performance.

Money Market Fund Investment Risk. An investment in a money market fund is not a bank deposit and is not insured or guaranteed by any bank, the FDIC or any other government agency. Although money market funds seek to preserve the value of investments at $1.00 per share, it is possible for the Fund to lose money by investing in money market funds. In addition to the fees and expenses that the Fund directly bears, the Fund indirectly bears the fees and expenses of any money market funds in which it invests, including affiliated money market funds. The Fund will also be exposed to the investment risks of the money market fund. To the extent the Fund invests in instruments such as derivatives, the Fund may hold investments, which may be significant, in money market fund shares to cover its obligations resulting from its investments in derivatives.

Mortgage- and Other Asset-Backed Securities Risk. The value of any mortgage-backed and other asset-backed securities held by the Fund may be affected by, among other things, changes or perceived changes in: interest rates, factors concerning the interests in and structure of the issuer or the originator of the mortgages or other assets, the creditworthiness of the entities that provide any supporting letters of credit, surety bonds or other credit enhancements, or the market's assessment of the quality of underlying assets. Payment of principal and interest on some mortgage-backed securities (but not the market value of the securities themselves) may be guaranteed by the full faith and credit of the U.S. Government or by its agencies, authorities, enterprises or instrumentalities, which are not insured or guaranteed by the U.S. Government. Mortgage-backed securities issued by non-governmental issuers (such as commercial banks, savings and loan institutions, private mortgage insurance companies, mortgage bankers and other secondary market issuers) may entail greater risk than obligations guaranteed by the U.S. Government. Mortgage-backed securities are subject to prepayment risk, which is the possibility that the underlying mortgage may be refinanced or prepaid prior to maturity during periods of declining or low interest rates, causing the Fund to have to reinvest the money received in securities that have lower yields. Rising or high interest rates tend to extend the duration of mortgage-backed securities, making their prices more volatile and more sensitive to changes in interest rates.

B-5

Additional Information About the Fund

Additional information about the Fund’s investments will be available in the Fund’s annual and semiannual reports to shareholders. In the annual report, you will find a discussion of the market conditions and investment strategies that significantly affected the Fund’s performance during its last fiscal year. The SAI also provides additional information about the Fund and its policies. The SAI, which has been filed with the SEC, is legally part of this prospectus (incorporated by reference). To obtain these documents free of charge, to request other information about the Fund and to make shareholder inquiries contact Columbia Funds as follows:

By Mail: Columbia Funds
c/o Columbia Management Investment Services Corp.
P.O. Box 8081
Boston, MA 02266-8081

By Telephone: 800.345.6611

Online: columbiamanagement.com

Information Provided by the SEC

You can review and copy information about the Fund (including this prospectus, the SAI and shareholder reports when available) at the SEC’s Public Reference Room in Washington, D.C. To find out more about the operation of the Public Reference Room, call the SEC at 202.551.8090. Reports and other information about the Fund are also available in the EDGAR Database on the SEC’s website at http://www.sec.gov. You can receive copies of this information, for a fee, by electronic request at the following e-mail address: publicinfo@sec.gov or by writing the Public Reference Section, Securities and Exchange Commission, Washington, D.C. 20549-1520.

The investment company registration number of Columbia Funds Series Trust I, of which the Fund is a series, is 811-04367.

PRO249_01_D01_(03/14)

Class		Ticker Symbol
Class A Shares		CDRAX
Class C Shares		CDRCX
Class R4 Shares		CDRRX
Class R5 Shares		CDRFX
Class Z Shares		CDRZX

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