485APOS 1 d847164d485apos.htm COLUMBIA FUNDS SERIES TRUST I Columbia Funds Series Trust I
Table of Contents

As filed with the Securities and Exchange Commission on January 9, 2015.

Registration Nos. 2-99356

811-04367

 

 

 

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

 

 

 

  FORM N-1A   
 

REGISTRATION STATEMENT

UNDER

THE SECURITIES ACT OF 1933

   x
  Pre-Effective Amendment No.    ¨
  Post-Effective Amendment No. 217    x
  and/or   
 

REGISTRATION STATEMENT

UNDER

THE INVESTMENT COMPANY ACT OF 1940

   x
  Amendment No. 219    x
  (Check Appropriate Box or Boxes)   

 

 

COLUMBIA FUNDS SERIES TRUST I

(Exact Name of Registrant as Specified in Charter)

 

 

225 Franklin Street, Boston, Massachusetts 02110

(Address of Principal Executive Officers) (Zip Code)

Registrant’s Telephone Number, Including Area Code: (800) 345-6611

 

 

Christopher O. Petersen, Esq.

c/o Columbia Management Investment Advisers, LLC

225 Franklin Street

Boston, Massachusetts 02110

(Name and Address of Agent for Service)

 

 

Approximate Date of Proposed Public Offering:

It is proposed that this filing will become effective (check appropriate box)

 

¨ Immediately upon filing pursuant to paragraph (b)
¨ On (date) pursuant to paragraph (b)
¨ 60 days after filing pursuant to paragraph (a)(1)
¨ On (date) pursuant to paragraph (a)(1)
x 75 days after filing pursuant to paragraph (a)(2)
¨ On (date) pursuant to paragraph (a)(2) of rule 485.

If appropriate, check the following box:

 

¨ This post-effective amendment designates a new effective date for a previously filed post-effective amendment.

This Post-Effective Amendment relates solely to the Registrant’s Columbia Multi-Asset Income Fund and Columbia U.S. Social Bond Fund series. Information contained in the Registrant’s Registration Statement relating to any other series of the Registrant is neither amended nor superseded hereby.

 

 

 


Table of Contents
The information in this Prospectus is not complete and may be changed. We may not sell these securities until the registration statement filed with the Securities and Exchange Commission is effective. This Prospectus is not an offer to sell these securities and it is not soliciting an offer to buy these securities in any state where the offer or sale is not permitted.
SUBJECT TO COMPLETION | PRELIMINARY PROSPECTUS | DATED AS OF [January 9, 2015]
Prospectus
[________], [2015]
Columbia Multi-Asset Income Fund
    
Class   Ticker Symbol
Class A Shares   [_____]
Class C Shares   [_____]
Class I Shares   [_____]
Class R4 Shares   [_____]
Class R5 Shares   [_____]
Class W Shares   [_____]
Class Z Shares   [_____]
As with all mutual funds, the Securities and Exchange Commission (SEC) has not approved or disapproved these securities or passed upon the adequacy of this prospectus. Any representation to the contrary is a criminal offense.

Columbia  Multi-Asset Income Fund
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2 Prospectus [2015]

Columbia Multi-Asset Income Fund
Summary of the Fund
Investment Objective
Columbia Multi-Asset Income Fund (the Fund) seeks to provide shareholders with a high level of current income. The Fund’s secondary objective is total return.
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. (the Distributor). 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 23 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 I,
R4, R5,
W and Z
Maximum sales charge (load) imposed on purchases (as a % of offering price) 5.75% 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 I Class R4 Class R5 Class W Class Z
Management fees [_____]% [_____]% [_____]% [_____]% [_____]% [_____]% [_____]%
Distribution and/or service (12b-1) fees [_____]% [_____]% [_____]% [_____]% [_____]% [_____]% [_____]%
Other expenses(c) [_____]% [_____]% [_____]% [_____]% [_____]% [_____]% [_____]%
Acquired fund fees and expenses(d) [_____]% [_____]% [_____]% [_____]% [_____]% [_____]% [_____]%
Total annual Fund operating expenses [_____]% [_____]% [_____]% [_____]% [_____]% [_____]% [_____]%
(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) Other expenses are based on estimated amounts for the Fund's current fiscal year.
(d) Acquired fund fees and expenses are based on estimated amounts for the current fiscal year.
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.
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) $[_____] $[_____]
Class C (assuming redemption of all shares at the end of the period) $[_____] $[_____]
Class C (assuming no redemption of shares) $[_____] $[_____]
Prospectus [2015] 3

Columbia  Multi-Asset Income Fund
Summary of the Fund (continued)
  1 year 3 years
Class I (whether or not shares are redeemed) $[_____] $[_____]
Class R4 (whether or not shares are redeemed) $[_____] $[_____]
Class R5 (whether or not shares are redeemed) $[_____] $[_____]
Class W (whether or not shares are redeemed) $[_____] $[_____]
Class Z (whether or not shares are redeemed) $[_____] $[_____]
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 allocates its assets to multiple asset classes in pursuit of its investment objective. The Fund may invest in the securities, instruments and assets described herein directly, or indirectly thought investments in other mutual funds and exchange-traded funds (ETFs) managed by third parties or the investment manager or its affiliates. The Fund seeks to use asset class selection and diversification as its primary strategy to generate income and total return.
The Fund’s investment manager, Columbia Management Investment Advisers, LLC (Columbia Management or the Investment Manager) determines the Fund’s desired exposures to, and allocation strategy across, asset classes. The Fund is not required to allocate its investments among asset classes in any fixed proportion. The relative proportions of the Fund’s investments allocated to each asset class may change over time based upon market and economic conditions.
The fixed income securities in which the Fund may invest directly or indirectly through underlying funds include debt securities of governments throughout the world (including the U.S. and emerging markets) as well as their agencies and instrumentalities and government-sponsored enterprises, debt securities of non-governmental issuers (e.g., corporate issuers) throughout the world (including the U.S. and emerging markets), debt securities of any credit rating (including below investment grade debt securities, commonly known as “high-yield” or “junk” bonds) or debt securities that are unrated, commercial and residential mortgage-backed securities, and bank loans. There is no limitation on the maturities or duration of the instruments in which the Fund may invest.
The equity securities in which the Fund may invest directly or indirectly through underlying funds include those of issuers of any market capitalization located throughout the world (including the U.S. and emerging markets) across various investment styles (e.g., growth-, value-oriented styles), which may include common stocks, preferred stocks, convertible securities, master limited partnerships, and real estate investment trusts (REITs) and instruments of similar entities formed under the laws of non-U.S. countries.
The Fund may invest in derivatives, including structured notes (such as equity-linked notes, including buy-write notes) for investment purposes.
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.
Allocation  Risk. Because the Fund uses an asset allocation strategy in pursuit of its investment objective, there is a risk that the Fund's allocation among asset classes, investments, strategies and/or investment styles 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.
4 Prospectus [2015]

Columbia Multi-Asset Income Fund
Summary of the Fund (continued)
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.
Confidential Information Access Risk. Portfolio managers may 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. A 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.
Credit Risk. The value of loans or fixed-income securities may decline if the borrower or the issuer of the security defaults or otherwise becomes unable or unwilling, or is perceived to be unable or unwilling, to honor its financial obligations, such as making payments to the Fund when due. Rating agencies assign credit ratings to certain loans and fixed-income securities to indicate their credit risk. Lower quality or unrated securities held by the Fund may present increased credit risk as compared to higher-rated securities. Non-investment grade loans or fixed-income securities (commonly called “high-yield” or “junk”) are subject to greater price fluctuations and are more likely to experience a default than investment grade loans or securities and therefore may expose the Fund to increased credit risk. If the Fund purchases unrated loans or securities, or if the ratings of loans or securities held by the Fund are lowered after purchase, the Fund will depend on analysis of credit risk more heavily than usual. 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 that is adverse to the holders of the loan. Such actions may include 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. 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 its NAV. 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 for the Fund. Derivative investments 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, counterparty risk, hedging risk, leverage risk and/or liquidity risk.
Derivatives Risk/Structured Investments Risk. Structured instruments include debt instruments that are collateralized by the underlying cash flows of a pool of financial assets or receivables. Structured investments may be less liquid than other debt securities (or illiquid), and the price of structured investments may be more volatile. In some cases, depending on its terms, a structured investment may provide that the principal and/or interest payments may be adjusted below zero. Structured investments also may involve significant credit risk and risk of default by the counterparty. The Fund’s use of structured instruments may not work as intended. If structured investments are used to reduce the duration of the Fund’s portfolio, this may limit the Fund’s return when having a longer duration would be beneficial (for instance, when interest rates decline).
Emerging Market Securities Risk. Securities issued by foreign governments or companies in emerging market countries, such as Russia and certain countries in Eastern Europe, the Middle East, Asia, Latin America or Africa, 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.
Prospectus [2015] 5

Columbia  Multi-Asset Income Fund
Summary of the Fund (continued)
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.
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 of an issuer, 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 securities of U.S. companies, and are subject to the risks associated with potential imposition of economic and other sanctions against a particular foreign country, its nationals or industries or businesses within the country. The performance of the Fund may be negatively impacted by fluctuations in a foreign currency’s strength or weakness relative to the U.S. dollar, particularly if the Fund invests a significant percentage of its assets in foreign securities or other assets denominated in currencies other than the U.S. dollar.
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.
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.
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 tend to fall, and if interest rates fall, the values of debt securities 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 will usually 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. Similarly, a period of rising interest rates may negatively impact the Fund’s performance. Actions by governments and central banking authorities can result in increases in interest rates. Such actions may negatively affect the value of fixed-income securities held by the Fund, resulting in a negative impact on the Fund's performance and NAV. Securities with floating coupon rates are typically less sensitive to interest rate changes, but these securities may decline in value if their coupon rates do not rise as much as, or keep pace with,  yields on such types of securities. 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 NAV.
Issuer Risk. An issuer in which the Fund invests or to which it has exposure 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 investments which may make it difficult to sell the investment at a desirable time or price. Changing regulatory, market or other conditions or environments (for example, the interest rate or credit environments) may adversely affect the liquidity of the Fund's investments. The Fund may have to accept a lower selling price for the holding, 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 or other assets 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. Price volatility may be higher for illiquid investments as a result of, for example, the relatively less frequent pricing of such securities (as compared to liquid investments). Generally, the less liquid the market at the time the Fund sells a portfolio investment, the greater the risk of loss or decline of value to the Fund. Price volatility, liquidity of the market and other factors can lead to an increase in Fund redemptions, which may negatively impact Fund performance and NAV, including, for example, if the Fund is forced to sell securities in a down market.
6 Prospectus [2015]

Columbia Multi-Asset Income Fund
Summary of the Fund (continued)
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. An investment in the Fund could lose money over short or long periods. Although equity securities generally tend to have greater price volatility than debt securities, under certain market conditions, debt securities may have comparable or greater price volatility.
Master Limited Partnership Risk. Investments in securities (units) of master limited partnerships involve risks that differ from an investment in common stock. Investors have more limited rights to vote on matters affecting the partnership. Investments are also subject to certain tax risks and conflicts of interest may exist between common unit holders, subordinated unit holders and the general partner of a master limited partnership.
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 a particular U.S. Government agency, authority, enterprise or instrumentality, and some, but not all, are also 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- and other asset-backed securities are subject to prepayment risk, which is the possibility that the underlying mortgage or other asset 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- and other asset-backed securities, making their prices more volatile and more sensitive to changes in interest rates.
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, in the case of prepayment risk, be called or otherwise converted, prepaid or redeemed before maturity and, in the case of extension risk, the investment might not be called as expected, 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. In the case of mortgage- or asset-backed securities, 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. Investments in real estate investment trusts (REITs) and in securities of other companies (wherever organized) principally engaged in the real estate industry subject the Fund to, among other things, risks similar to those of direct investments in real estate and the real estate industry in general. These include 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 interests in a REIT may be affected by, among other factors, changes in the value of the underlying properties owned by the REIT, 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.
Prospectus [2015] 7

Columbia  Multi-Asset Income Fund
Summary of the Fund (continued)
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. Securities of small- and mid-cap companies may be less liquid and more volatile than the securities of larger companies.
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 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.
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 a Blended Index, consisting of 60% of Barclays U.S. Aggregate Bond Index and 40% of S&P 500 Index, and to the performance of the Barclays U.S. Aggregate Bond 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   Senior Portfolio Manager, Managing Director, Global Head of Investment Solutions and Co-Head of Global Asset Allocation   Lead manager   [______ 2015]
Toby Nangle   Portfolio Manager and Co-Head of Global Asset Allocation   Co-manager   [______ 2015]
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, sell or exchange shares of the Fund through 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
Classes A & C All accounts other than IRAs $2,000 $100
IRAs $1,000 $100
Classes I & R4 All eligible accounts None N/A
8 Prospectus [2015]

Columbia Multi-Asset Income 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
Omnibus retirement plans None N/A
Class W All eligible accounts $500 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.
Prospectus [2015] 9

Columbia  Multi-Asset Income Fund
More Information About the Fund
Investment Objective
Columbia Multi-Asset Income Fund (the Fund) seeks to provide shareholders with a high level of current income. The Fund’s secondary objective is total return. 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
Under normal circumstances, the Fund allocates its assets to multiple asset classes in pursuit of its investment objective. The Fund may invest in the securities, instruments and assets described herein directly, or indirectly thought investments in other mutual funds and exchange-traded funds (ETFs) managed by third parties or the investment manager or its affiliates. The Fund seeks to use asset class selection and diversification as its primary strategy to generate income and total return.
The Fund’s investment manager, Columbia Management Investment Advisers, LLC (Columbia Management or the Investment Manager) determines the Fund’s desired exposures to, and allocation strategy across, asset classes. The Fund is not required to allocate its investments among asset classes in any fixed proportion. The relative proportions of the Fund’s investments allocated to each asset class may change over time based upon market and economic conditions.
The fixed income securities in which the Fund may invest directly or indirectly through underlying funds include debt securities of governments throughout the world (including the U.S. and emerging markets) as well as their agencies and instrumentalities and government-sponsored enterprises, debt securities of non-governmental issuers (e.g., corporate issuers) throughout the world (including the U.S. and emerging markets), debt securities of any credit rating (including below investment grade debt securities, commonly known as “high-yield” or “junk” bonds) or debt securities that are unrated, commercial and residential mortgage-backed securities, and bank loans. There is no limitation on the maturities or duration of the instruments in which the Fund may invest.
The equity securities in which the Fund may invest directly or indirectly through underlying funds include those of issuers of any market capitalization located throughout the world (including the U.S. and emerging markets) across various investment styles (e.g., growth-, value-oriented styles), which may include common stocks, preferred stocks, convertible securities, master limited partnerships, and real estate investment trusts (REITs) and instruments of similar entities formed under the laws of non-U.S. countries.
The Fund may invest in derivatives, including structured notes (such as equity-linked notes, including buy-write notes) for investment purposes.
The Investment Manager’s investment process employs both quantitative and fundamental methodologies to make asset allocation decisions based on the Fund’s investment objective, global macro-economic research and historical and projected returns for each asset class category. This process seeks to allocate the Fund’s net assets to achieve desired investment exposures consistent with the Fund’s objective. The Fund’s asset allocations may change at any time.
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. The Fund is actively managed and its performance therefore will reflect, in part, the ability of the portfolio managers to make investment decisions that will achieve 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.
Allocation  Risk. Because the Fund uses an asset allocation strategy in pursuit of its investment objective, there is a risk that the Fund's allocation among asset classes, investments, strategies and/or investment styles 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.
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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.
Confidential Information Access Risk. Portfolio managers may 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. A 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 ability to assess the desirability of such consents, waivers or amendments may be compromised. For these and other reasons, it is possible that the decision 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 (the risk of losses attributable to changes in interest rates) and credit risk (the risk that the issuer of a debt security 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 (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 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.
Credit Risk. The value of loans or fixed-income securities may decline if the borrower or the issuer of the security defaults or otherwise becomes unable or unwilling, or is perceived to be unable or unwilling, to honor its financial obligations, such as making payments to the Fund when due. Various factors could affect the actual or perceived willingness or ability of the borrower or the issuer to make timely interest or principal payments, including changes in the financial condition of the borrower or the issuer or in general economic conditions. Fixed-income securities backed by an issuer's taxing authority may be subject to legal limits on the issuer's power to increase taxes or otherwise to raise revenue, or may be dependent on legislative appropriation or government aid. Certain fixed-income securities are backed only by revenues derived from a particular project or source, rather than by an issuer's taxing authority, and thus may have a greater risk of default. Rating agencies assign credit ratings to certain loans and fixed-income securities to indicate their credit risk. Lower quality or unrated securities held by the Fund may present increased credit risk as compared to higher-rated securities. Non-investment grade loans or fixed-income securities (commonly called “high-yield” or “junk”) are subject to greater price fluctuations and are more likely to experience a default than investment grade loans or securities and therefore may expose the Fund to increased credit risk. If the Fund purchases unrated loans or fixed-income securities, or if the ratings of securities held by the Fund are lowered after purchase, the Fund will depend on analysis of credit risk more heavily than usual. 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 that is adverse to the holders of the loan. Such actions may include 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. 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 its NAV. 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. Derivatives are financial instruments whose value depends on, or is derived from, the value of other underlying assets. 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
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the potential for increased losses, the use of derivative instruments may lead to increased volatility for the Fund. Derivative investments will typically increase the Fund’s exposure to principal risks to which it is otherwise exposed, and may expose the Fund to additional risks. Depending on the type and purpose of the Fund’s derivative investments, these risks may include: correlation risk (there may be an imperfect correlation between the hedge and the opposite position, which is related to hedging risk), counterparty risk (the counterparty to the instrument may not perform or be able to perform in accordance with the terms of the instrument), leverage risk (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 may offset gains), and/or 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 losses for the Fund.
Derivatives Risk/Structured Investments Risk. Structured instruments include debt instruments that are collateralized by the underlying cash flows of a pool of financial assets or receivables. Structured investments may be less liquid than other debt securities (or illiquid), and the price of structured investments may be more volatile. In some cases, depending on its terms, a structured investment may provide that the principal and/or interest payments may be adjusted below zero. Structured investments also may involve significant credit risk and risk of default by the counterparty. The Fund’s use of structured instruments may not work as intended. If structured investments are used to reduce the duration of the Fund’s portfolio, this may limit the Fund’s return when having a longer duration would be beneficial (for instance, when interest rates decline).
Emerging Market Securities Risk. Securities issued by foreign governments or companies in emerging market countries, such as Russia and certain countries in Eastern Europe, the Middle East, Asia, Latin America or Africa, 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, economic or other 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.
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. The performance of the Fund may be negatively impacted by fluctuations in a foreign currency’s strength or weakness relative to the U.S. dollar. Foreign securities may also be less liquid than securities of U.S. companies 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 potentially confiscatory withholding or other taxes on the Fund’s income, capital gains or proceeds from the disposition of foreign securities, which could reduce the Fund’s return 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 foreign companies; the impact of economic, political, social, diplomatic or other conditions or events; possible seizure, expropriation or nationalization of a company or its assets or the assets of a particular investor or category of investors; 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; the imposition of economic and other sanctions against a particular foreign country, its nationals or industries or businesses within the country; 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. The risks posed by sanctions against a particular foreign country, its nationals or industries or businesses within the country may be heightened to the extent the Fund invests significantly in the affected country or region or in issuers from the affected country that depend on global markets.
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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 experience greater price fluctuations in response 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 are generally 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. High-yield 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.
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 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.
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 tend to fall, and if interest rates fall, the values of debt securities 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 will usually 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. Similarly, a period of rising interest rates may negatively impact the Fund’s performance. Actions by governments and central banking authorities can result in increases in interest rates. Such actions may negatively affect the value of fixed-income securities held by the Fund, resulting in a negative impact on the Fund's performance and NAV. Securities with floating coupon rates are typically less sensitive to interest rate changes, but these securities may decline in value if their coupon rates do not rise as much as, or keep pace with,  yields on such types of securities. 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 NAV.
Issuer Risk. An issuer in which the Fund invests or to which it has exposure 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 investments which may make it difficult to sell the investment at a desirable time or price. Changing regulatory, market or other conditions or environments (for example, the interest rate or credit environments) may adversely affect the liquidity of the Fund's investments. The Fund may have to accept a lower selling price for the holding, 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 other debt securities at a fair price may have a negative impact on the Fund’s performance. Securities or other assets 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. Price volatility may be higher for illiquid investments as a result of, for example, the relatively less frequent pricing of such securities (as compared to liquid investments). Generally, the less liquid the market at the time the Fund sells a portfolio investment, the greater the risk
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of loss or decline of value to the Fund. Price volatility, liquidity of the market and other factors can lead to an increase in Fund redemptions, which may negatively impact Fund performance and NAV, including, for example, if the Fund is forced to sell securities in a down market.
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 actual or perceived factors affecting an issuer (e.g., an unfavorable earnings report), the industry or sector in which it operates, or the market as a whole, which may reduce the value of an investment in the Fund. Accordingly, an investment in the Fund could lose money over short or long periods. The market values of the securities the Fund holds can be affected by changes or perceived changes in U.S. or foreign economies and financial markets, and the liquidity of these securities, among other factors. Although equity securities generally tend to have greater price volatility than debt securities, under certain market conditions, debt securities may have comparable or greater price volatility. In addition, stock prices may be sensitive to rising interest rates, as the cost of capital rises and borrowing costs increase.
Master Limited Partnership Risk. Investments in securities (units) of master limited partnerships involve risks that differ from an investment in common stock. Holders of these units have more limited rights to vote on matters affecting the partnership. These units may be subject to cash flow and dilution risks. There are also certain tax risks associated with such an investment. In particular, the Fund’s investment in master limited partnerships can be limited by the Fund’s intention to qualify as a regulated investment company for U.S. federal income tax purposes, and can limit the Fund’s ability to so qualify. In addition, conflicts of interest may exist between common unit holders, subordinated unit holders and the general partner of a master limited partnership, including a conflict arising as a result of incentive distribution payments. In addition, there are risks related to the general partner’s right to require unit holders to sell their common units at an undesirable time or price.
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. Mortgage-backed securities represent interests in, or are backed by, pools of mortgages from which payments of interest and principal (net of fees paid to the issuer or guarantor of the securities) are distributed to the holders of the mortgage-backed securities. Other types of asset-backed securities typically represent interests in, or are backed by, pools of receivables such as credit, automobile, student and home equity loans. Mortgage- and other asset-backed securities can have a fixed or an adjustable rate. Mortgage- and other asset-backed securities are subject to prepayment risk, which is the possibility that the underlying mortgage or other asset 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. In addition, the impact of prepayments on the value of mortgage- and other asset-backed securities may be difficult to predict and may result in greater volatility. Rising or high interest rates tend to extend the duration of mortgage- and other asset-backed securities, making them more volatile and more sensitive to changes in interest rates. Payment of principal and interest on some mortgage-backed securities (but not the market value of the securities themselves) may be guaranteed (i) by the full faith and credit of the U.S. Government (in the case of securities guaranteed by the Government National Mortgage Association) or (ii) by its agencies, authorities, enterprises or instrumentalities (in the case of securities guaranteed by the Federal National Mortgage Association (FNMA) or the Federal Home Loan Mortgage Corporation (FHLMC)), which are not insured or guaranteed by the U.S. Government (although FNMA and FHLMC may be able to access capital from the U.S. Treasury to meet their obligations under such securities). 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 be supported by various credit enhancements, such as pool insurance, guarantees issued by governmental entities, letters of credit from a bank or senior/subordinated structures, and may entail greater risk than obligations guaranteed by the U.S. Government, whether or not such obligations are guaranteed by the private issuer.
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).
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Prepayment and Extension Risk. Prepayment 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 extension risk is the risk that the investment might not be called as expected. In the case of prepayment risk, 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, in the case of extension risk, as interest rates rise or spreads widen, the likelihood of prepayment decreases and the maturity of the investment may extend the life of the investment 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. Investments in real estate investment trusts (REITs) and in securities of other companies (wherever organized) principally engaged in the real estate industry subject the Fund to, among other things, risks similar to those of direct investments in real estate and the real estate industry in general. These include 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 interests in a REIT may be affected by, among other factors, changes in the value of the underlying properties owned by the REIT, 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.
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 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.
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.
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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. Information on the Fund’s holdings can be found in the Fund’s shareholder reports or by visiting columbiamanagement.com.
Transactions in Derivatives
The Fund may enter into derivative transactions or otherwise have exposure to derivative transactions through underlying investments. 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 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”, and provides asset-allocation services to (i) shareholders by investing in shares of other Columbia Funds, which may include the Fund (collectively referred to in this section as Underlying Funds), and (ii) 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 large positions of certain affiliated products, the Underlying Funds may experience relatively large inflows and outflows of cash due to affiliated products’ purchases and sales of Underlying Fund shares. 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
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increased expenses as they buy and sell portfolio securities to manage the cash flow effect related to 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 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 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.
Lending of Portfolio Securities
The Fund may lend portfolio securities to broker-dealers or other financial intermediaries on a fully collateralized basis in order to earn additional income. The Fund may lose money from securities lending if, for example, it is delayed in or prevented from selling the collateral after the loan is made or recovering the securities loaned or if it incurs losses on the reinvestment of cash collateral.
The Fund currently does not participate in the securities lending program but the Board of Trustees (the Board) may determine to renew participation in the future. For more information on lending of portfolio securities and the risks involved, see the Fund’s SAI and its annual and semiannual reports to shareholders.
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.
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.
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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 its benchmark(s). In addition, the Fund may invest in securities outside any 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.
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.
18 Prospectus [2015]

Columbia Multi-Asset Income Fund
More Information About the Fund (continued)
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 [__________], 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 Multi-Asset Income Fund
Class A [_____]%
Class C [_____]%
Class I [_____]%
Class R4 [_____]%
Class R5 [_____]%
Class W [_____]%
Class Z [_____]%
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.
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.
Primary Service Providers
The Investment Manager, which also serves as the Fund’s administrator (the 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 the 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, determining what securities and other investments the Fund should buy or sell and executing portfolio transactions. The Investment Manager may use the research and other capabilities of its affiliates and third parties in managing the Fund’s investments.
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
Prospectus [2015] 19

Columbia  Multi-Asset Income Fund
More Information About the Fund (continued)
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 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.
From time to time the Investment Manager may engage its investment advisory affiliates (Participating Affiliates) around the world to provide a variety of services such as, investment research, investment monitoring, trading and discretionary investment management (including portfolio management) to certain accounts managed by the Investment Manager, including the Fund. The Investment Manager expects to engage certain of its Threadneedle Investments affiliates to provide such services. These Participating Affiliates will provide services to the Investment Manager either pursuant to subadvisory agreements, personnel-sharing agreements or similar inter-company arrangements and the Investment Manager will bear any and all costs of such agreements. These Participating Affiliates, like the Investment Manager, are direct or indirect subsidiaries of Ameriprise Financial and are registered with the appropriate respective regulators in their home jurisdictions and, where required, the SEC and the Commodity Futures Trading Commission in the United States.
Pursuant to some of these arrangements, certain employees of these Participating Affiliates may serve as “associated persons” of the Investment Manager and, in this capacity, subject to the oversight and supervision of the Investment Manager and consistent with the investment objectives, policies and limitations set forth in the Fund’s prospectus and SAI, may provide such services to the Fund on behalf of the Investment Manager.
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, as follows:
    
Annual Advisory Fee, as a % of Average Daily Net Assets:
Up to $[____] [____]%
$[____] to $[____] [____]%
$[____] to $[____] [____]%
$[____] to $[____] [____]%
$[____] to $[____] [____]%
$[____] to $[____] [____]%
$[____] and over [____]%
A discussion regarding the basis for the Board approving the adoption of the investment management services agreement will be available in the Fund's first report to shareholders for the fiscal [_____] ended [_____].
Portfolio Managers
Information about the 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   Senior Portfolio Manager, Managing Director, Global Head of Investment Solutions and Co-Head of Global Asset Allocation   Lead manager   [______ 2015]
Toby Nangle   Portfolio Manager and Co-Head of Global Asset Allocation   Co-manager   [______ 2015]
20 Prospectus [2015]

Columbia Multi-Asset Income Fund
More Information About the Fund (continued)
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 from 1993 to 2013, most recently as head of global asset allocation. 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.
Mr. Nangle joined Threadneedle as Head of Multi-Asset in 2012. Prior to joining Threadneedle, Mr. Nangle worked at Baring Asset Management, initially in the fixed income team and subsequently as Director of the Multi-Asset Group. Mr. Nangle began his investment career in 1997 and earned a M.A. (Hons) in history, and a MPhil in international relations from Sidney Sussex College, University of Cambridge.
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.
The Distributor
Shares of the Fund are distributed by Columbia Management Investment Distributors, Inc., which is located at 225 Franklin Street, Boston, MA 02110. 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, to provide various 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, 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;
Prospectus [2015] 21

Columbia  Multi-Asset Income Fund
More Information About the Fund (continued)
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.
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 quarterly (10-Q), annual (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.
22 Prospectus [2015]

Columbia Multi-Asset Income Fund
Choosing a Share Class
The Funds
The Columbia Funds (referred to as the Funds) generally share the same policies and procedures for investor services, as described below. Each Fund is a series of Columbia Funds Series Trust (CFST), Columbia Funds Series Trust I (CFST I) or Columbia Funds Series Trust II (CFST II), and certain features of distribution and/or service plans may differ among these trusts. The Fund offered by this prospectus is a series of CFST I.
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 inactive links 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” (collectively, selling agents) refer to the financial intermediaries that are authorized to sell shares of the Funds. 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 advisers, third party administrators and other financial intermediaries, including Ameriprise Financial and its affiliates.
Omnibus Accounts
The term “omnibus account” refers to a selling agent’s account with the Fund (through the Transfer Agent) that represents the combined holdings of, and transactions in, Fund shares of one or more clients of the selling agent (beneficial shareholders). Omnibus accounts are held in the name of the selling agents and not in the name of the beneficial shareholders invested in the Fund through omnibus accounts.
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 [2015] 23

Columbia  Multi-Asset Income 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
24 Prospectus [2015]

Columbia Multi-Asset Income 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 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 Series of CFST & CFST I: distribution fee of 0.50%
Series of CFST II: 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
Prospectus [2015] 25

Columbia  Multi-Asset Income 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(f)
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%
Class Y Eligibility: Available only to retirement plans that maintain plan-level or omnibus accounts with the Fund(f)
Minimum Initial Investment: None
Investment Limit and Conversion Features: None
None None None
26 Prospectus [2015]

Columbia Multi-Asset Income 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 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 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 series of CFST I 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 AMT-Free Intermediate Muni Bond Fund, Columbia High Yield Municipal 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 AMT-Free Intermediate Muni 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.
Prospectus [2015] 27

Columbia  Multi-Asset Income Fund
Choosing a Share Class (continued)
•  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 T Shares. Shareholders with Class T accounts who received, and have continuously held, Class T shares in connection with the merger of certain Galaxy funds into certain Funds that were then named Liberty funds may continue to make additional purchases of such share class.
•  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 such 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.
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 (through the Transfer Agent, rather than through a selling agent). Sales charges vary depending on the amount of your purchase.
28 Prospectus [2015]

Columbia Multi-Asset Income Fund
Choosing a Share Class (continued)
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 NAV 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 Adaptive Risk Allocation Fund,
Columbia Commodity Strategy 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)
         
Columbia AMT-Free Intermediate Muni Bond Fund, each of the AMT-Free State-Specific Intermediate Muni Bond Funds and Columbia Intermediate Bond Fund $ 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)
         
Prospectus [2015] 29

Columbia  Multi-Asset Income 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 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.
30 Prospectus [2015]

Columbia Multi-Asset Income 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.
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 [2015] 31

Columbia  Multi-Asset Income 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 AMT-Free Intermediate Muni Bond Fund, the AMT-Free State-specific Intermediate Muni Bond Funds, Columbia Intermediate Bond Fund and Columbia Short Term Bond Fund
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.
32 Prospectus [2015]

Columbia Multi-Asset Income 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, over time Class C shares can incur distribution and/or service fees that are equal to or more than the front-end sales charge and distribution and/or service 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 12 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 NAV 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 [2015] 33

Columbia  Multi-Asset Income 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%
34 Prospectus [2015]

Columbia Multi-Asset Income 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 [2015] 35

Columbia  Multi-Asset Income 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 under 21, step-child under 21, 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.
36 Prospectus [2015]

Columbia Multi-Asset Income 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 Funds’ 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 (series of CFST and CFST I) 0.50% (g) 0.50%
Class R (series of CFST II) 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 [2015] 37

Columbia  Multi-Asset Income 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
Series of CFST 0.25%; these Funds pay a
combined distribution and
service fee
Series of CFST II (other than Columbia
Money Market Fund)
up to 0.25% up to 0.25% 0.25%
Columbia Money Market Fund 0.10%
Columbia AMT-Free Oregon Intermediate Muni Bond Fund, Columbia Balanced Fund, Columbia Contrarian Core Fund, Columbia Dividend Income Fund, Columbia Global Technology Growth Fund, Columbia Intermediate Bond Fund, Columbia Large Cap Growth Fund, Columbia Mid Cap Growth Fund, Columbia Real Estate Equity Fund, Columbia Small Cap Core Fund, Columbia Small Cap Growth Fund I 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 Adaptive Risk Allocation Fund, Columbia AMT-Free Connecticut Intermediate Muni Bond Fund, Columbia AMT-Free Massachusetts Intermediate Muni Bond Fund, Columbia AMT-Free New York Intermediate Muni Bond Fund, Columbia Bond Fund, Columbia California Tax-Exempt 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 New York Tax-Exempt Fund, Columbia Pacific/Asia Fund, Columbia Select Large Cap Growth Fund, Columbia Small Cap Value Fund I, Columbia Strategic Income Fund, Columbia U.S. Treasury Index Fund, Columbia Value and Restructuring Fund 0.25% 0.25%
Columbia AMT-Free Intermediate Muni Bond Fund, Columbia High Yield Municipal Fund, Columbia Tax Exempt Fund 0.20% 0.20%
(b) The service fees for Class A, Class B and Class C shares of certain Funds vary. Service Fee for Class A, Class B and Class C shares of Columbia AMT-Free Intermediate Muni Bond Fund, Columbia High Yield Municipal 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 and Class C shares for Columbia AMT-Free Intermediate Muni Bond Fund The annual distribution fee shall be 0.65% of the average daily net assets of the Fund's Class B 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. The Distributor has voluntarily agreed to waive the service fee for Class A, Class B and Class C shares of Columbia U.S. Treasury Index Fund so that the service fee does not exceed 0.15% annually. This arrangement may be modified or terminated by the Distributor at any time.
(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. The Distributor has 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. This arrangement may be modified or terminated by the Distributor at any time. 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 a portion of the distribution fee it receives from Class B shares of Columbia Short Term Bond Fund so that the distribution fee does not exceed 0.30% annually. This arrangement 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: 0.45% for Columbia AMT-Free Connecticut Intermediate Muni Bond Fund, Columbia AMT-Free Massachusetts Intermediate Muni Bond Fund, Columbia AMT-Free New York Intermediate Muni Bond Fund, Columbia AMT-Free Oregon Intermediate Muni Bond Fund, Columbia California Tax-Exempt Fund and Columbia New York Tax-Exempt Fund; 0.60% for Columbia Corporate Income Fund and Columbia Short Term Bond Fund; 0.65% for Columbia High Yield Municipal Fund and Columbia Tax-Exempt Fund; and 0.70% for Columbia U.S. Treasury Index Fund. These arrangements may be modified or terminated by the Distributor at any time.
38 Prospectus [2015]

Columbia Multi-Asset Income Fund
Choosing a Share Class (continued)
(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 series of CFST and CFST I 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. Series of CFST II 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 series of CFST II, 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. In general, 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 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.
Series of CFST II. For Class A, Class B and Class W shares, the Distributor begins to pay these fees immediately after purchase. For 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 Class C shares sold and held through them, which the Distributor begins to pay 12 months after purchase. For Class B shares and for the first 12 months following the sale of 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. The maximum fee for services under the distribution and/or shareholder servicing plan for series of CFST II is the lesser of the amount of reimbursable expenses and the fee rates in the table above. If a share class of a series of CFST II has no reimbursable distribution or shareholder servicing expenses, it will suspend the payment of any such fee.
Series of CFST and CFST I. For 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 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 Class B share, and for the first 12 months following the sale of 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 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 other 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 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.
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
Prospectus [2015] 39

Columbia  Multi-Asset Income Fund
Choosing a Share Class (continued)
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 0.25% 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, maintenance of shareholder records, preparation of account statements and provision of 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.
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 pay 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.
40 Prospectus [2015]

Columbia Multi-Asset Income 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
Prospectus [2015] 41

Columbia  Multi-Asset Income Fund
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 for amounts greater than $100,000 and other transactions, as described below, 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
The Transfer Agent may require a Medallion Signature Guarantee for your signature in order to process certain transactions. A Medallion Signature Guarantee helps assure that a signature is genuine and not a forgery. A Medallion Signature Guarantee must be provided by an eligible guarantor institution including, but not limited to, the following: bank, credit union, savings association, broker or dealer, that participates in the Securities Transfer Association Medallion Program (STAMP), the Stock Exchange Medallion Program (SEMP) or the New York Stock Exchange Medallion Signature Program (MSP). Notarization by a notary public is not an acceptable signature guarantee. The Transfer Agent reserves the right to reject a signature guarantee and to request additional documentation for any transaction.
A Medallion Signature Guarantee is required if: (i) the transaction amount is over $100,000; (ii) you want your check made payable to someone other than yourself; (iii) your address has changed within the last 30 days; (iv) you want the check mailed to an address other than the address of record; (v) you want proceeds to be sent according to existing bank account instructions not coded for outgoing Automated Clearing House (ACH) or wire, or to a bank account not on file; (vi) you are the beneficiary of the account and the account owner is deceased (other documentation may be required); or (vii) you are changing legal ownership of your account.
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.
42 Prospectus [2015]

Columbia Multi-Asset Income 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.
Prospectus [2015] 43

Columbia  Multi-Asset Income Fund
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 in 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.
44 Prospectus [2015]

Columbia Multi-Asset Income 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.
Prospectus [2015] 45

Columbia  Multi-Asset Income Fund
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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Buying, Selling and Exchanging Shares (continued)
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 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 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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Buying, Selling and Exchanging Shares (continued)
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 certain Funds that were then 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 retirement plans that maintain plan-level or omnibus accounts with the Fund (through the Transfer Agent).
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. Selling agents that clear Fund share transactions through designated selling agents and their mutual fund trading platforms that were given specific written notice from the Transfer Agent of the termination, effective March 29, 2013, 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 have continuously held 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 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 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 so long as the initial Class Z account was funded by July 2, 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 received specific written notice from the Transfer Agent of the termination, effective March 29, 2013, of their eligibility for new 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). 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.
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Buying, Selling and Exchanging Shares (continued)
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, Class R4 and Class Y None N/A
Class R5 variable (d) N/A
Class W $500 N/A
Class Z variable (e) $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) 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 two 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.
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.
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Buying, Selling and Exchanging Shares (continued)
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 Columbia Management Advisors, LLC, Columbia Management Distributors, Inc., or Columbia Management Services, Inc., the adviser, distributor and transfer agent of series of CFST and CFST I prior to May 1, 2010 (the Previous Service Providers) 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 series of CFST or CFST I 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 Previous Service Providers and any of their immediate family members 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.
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.
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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. 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 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.
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Buying, Selling and Exchanging Shares (continued)
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.
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.
54 Prospectus [2015]

Columbia Multi-Asset Income Fund
Buying, Selling and Exchanging Shares (continued)
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.
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.
Prospectus [2015] 55

Columbia  Multi-Asset Income Fund
Buying, Selling and Exchanging Shares (continued)
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.
56 Prospectus [2015]

Columbia Multi-Asset Income 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 [________]
Distributions [___________]
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 Fund (through 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
Prospectus [2015] 57

Columbia  Multi-Asset Income 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. Dividends paid in January are deemed paid on December 31 of the prior year if the dividend was declared and payable to shareholders of record in October, November, or December of such prior year.
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 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.
Certain Funds may purchase or write options, as described further in the SAI. Generally, a Fund realizes a capital gain or loss on an option when the option expires, or when it is exercised, sold or otherwise terminated. However, if an option is a “section 1256 contract,” which includes most traded options on a broad-based index, and the Fund holds such option at the end of its taxable year, the Fund is deemed to sell such option at fair market value at such time and recognize any gain or loss thereon, which is generally deemed to be 60% long-term and 40% short-term gain or loss, as described further in the SAI.
58 Prospectus [2015]

Columbia Multi-Asset Income Fund
Distributions and Taxes (continued)
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 generally is required to report to shareholders and the Internal Revenue Service (the IRS) upon the sale, exchange or redemption of Fund shares cost basis information with respect to those shares. The Fund uses average cost basis as its default method of calculating cost basis. Please see columbiamanagement.com or contact the Fund at 800.345.6611 for more information regarding average cost basis reporting, other available cost basis methods and how to select or change a particular method or to choose specific shares to sell, redeem or exchange. If you hold Fund shares through a selling agent, you should contact your selling agent to learn about its cost basis reporting default method and the reporting elections available to your account.
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.
Prospectus [2015] 59

Columbia  Multi-Asset Income Fund
Distributions and Taxes (continued)
FUNDamentals
Taxes
The information provided above is only a summary of how U.S. federal income taxes may affect your investment in the Fund. It is not intended as a substitute for careful tax planning. Your investment in the Fund may have other tax implications. It does not apply to certain types of investors who may be subject to special rules, including foreign or tax-exempt investors or those holding Fund shares through a tax-advantaged account, such as a 401(k) plan or IRA. Please see the SAI for more detailed tax information. You should consult with your own tax advisor about the particular tax consequences to you of an investment in the Fund, including the effect of any foreign, state and local taxes, and the effect of possible changes in applicable tax laws.
60 Prospectus [2015]

Columbia Multi-Asset Income Fund
Financial Highlights
Because the Fund had not commenced operations prior to the date of this prospectus, no financial highlights are provided.
Prospectus [2015] 61

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.
© 2015 Columbia Management Investment Distributors, Inc.
225 Franklin Street, Boston, MA 02110
800.345.6611
PROXXX_0X_A01_[(0X/15)]


Table of Contents
The information in this Prospectus is not complete and may be changed. We may not sell these securities until the registration statement filed with the Securities and Exchange Commission is effective. This Prospectus is not an offer to sell these securities and it is not soliciting an offer to buy these securities in any state where the offer or sale is not permitted.
SUBJECT TO COMPLETION | PRELIMINARY PROSPECTUS | DATED AS OF January 9, 2015
Prospectus
[_________], [2015]
Columbia U.S. Social Bond Fund
    
Class   Ticker Symbol
Class A Shares   [_____]
Class C Shares   [_____]
Class R4 Shares   [_____]
Class R5 Shares   [_____]
Class Z Shares   [_____]
As with all mutual funds, the Securities and Exchange Commission (SEC) has not approved or disapproved these securities or passed upon the adequacy of this prospectus. Any representation to the contrary is a criminal offense.

Columbia  U.S. Social Bond Fund
Table of Contents

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2 Prospectus [2015]

Columbia U.S. Social Bond Fund
Summary of the Fund
Investment Objective
Columbia U.S. Social Bond Fund (the Fund) seeks total return, consisting of current income and capital appreciation, through investments that seek to support and fund socially beneficial activities and developments, primarily in the U.S.
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. (the Distributor). 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 19 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) 3.25% 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 [_____]% [_____]% [_____]% [_____]% [_____]%
Distribution and/or service (12b-1) fees [_____]% [_____]% [_____]% [_____]% [_____]%
Other expenses(c) [_____]% [_____]% [_____]% [_____]% [_____]%
Acquired fund fees and expenses(d) [_____]% [_____]% [_____]% [_____]% [_____]%
Total annual Fund operating expenses [_____]% [_____]% [_____]% [_____]% [_____]%
(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) Other expenses are based on estimated amounts for the Fund's current fiscal year.
(d) Acquired fund fees and expenses are based on estimated amounts for the current fiscal year.
Prospectus [2015] 3

Columbia  U.S. Social Bond 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.
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) $[_____] $[_____]
Class C (assuming redemption of all shares at the end of the period) $[_____] $[_____]
Class C (assuming no redemption of shares) $[_____] $[_____]
Class R4 (whether or not shares are redeemed) $[_____] $[_____]
Class R5 (whether or not shares are redeemed) $[_____] $[_____]
Class Z (whether or not shares are redeemed) $[_____] $[_____]
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 invests at least 80% of its net assets (including the amount of any borrowings for investment purposes) in bonds and other debt securities of issuers whose principal activities are located in the United States and its territories. The investment manager determines if an issuer’s principal activities are located in the United States or its territories by considering the issuer’s country of organization, its primary stock exchange listing, the source of its revenues, the location of its assets and other factors.
Under normal market conditions, the Fund invests at least 60% of its net assets (including the amount of any borrowings for investment purposes) in bonds and other debt securities that pay interest exempt from U.S. federal income tax (but not necessarily the federal alternative minimum tax). These securities are issued by states and their political subdivisions, agencies, authorities and instrumentalities and by other qualified issuers. With respect to the Fund’s investments in municipal securities, the Fund will primarily focus on sectors that the investment manager believes are aimed toward positive environmental and social development such as education, healthcare, community services, housing, water, sewer and similar socially impactful sectors.
The Fund may invest up to 40% of its net assets (including the amount of any borrowings for investment purposes) in bonds and other debt securities issued by corporate and other non-governmental issuers. With respect to the portion of the Fund invested in corporate bonds, the Fund will primarily invest in bonds that, at the time of purchase, are investment grade or are unrated but determined to be of comparable quality. When selecting debt securities issued by corporate and other non-governmental issuers, the Fund’s investment manager will consider the sustainability and social impact of the issuer, its products and/or practices.
The Fund may invest 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 may from time to time emphasize one or more sectors in selecting its investments. The Fund may invest in fixed or variable-rate debt securities.
4 Prospectus [2015]

Columbia U.S. Social Bond Fund
Summary of the Fund (continued)
The Fund may invest in fixed income securities of any maturity and does not seek to maintain either a particular dollar-weighted average maturity or a particular duration.
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.
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. Similarly, the Fund may underperform funds with similar investment objectives that seek a broader array of investments.
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.
Credit Risk. The value of fixed-income securities may decline if the issuer of the security defaults or otherwise becomes unable or unwilling, or is perceived to be unable or unwilling, to honor its financial obligations, such as making payments to the Fund when due. Rating agencies assign credit ratings to certain fixed-income securities to indicate their credit risk. Lower quality or unrated securities held by the Fund may present increased credit risk as compared to higher-rated securities. Non-investment grade loans or fixed-income securities (commonly called “high-yield” or “junk”) are subject to greater price fluctuations and are more likely to experience a default than investment grade loans or securities and therefore may expose the Fund to increased credit risk. If the Fund purchases unrated securities, or if the ratings of securities held by the Fund are lowered after purchase, the Fund will depend on analysis of credit risk more heavily than usual.
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.
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 tend to fall, and if interest rates fall, the values of debt securities 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 will usually 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. Similarly, a period of rising interest rates may negatively impact the Fund’s performance. Actions by governments and central banking authorities can result in increases in interest rates. Such actions may negatively affect the value of fixed-income securities held by the Fund, resulting in a negative impact on the Fund's performance and NAV.
Liquidity Risk. Liquidity risk is the risk associated with a lack of marketability of investments which may make it difficult to sell the investment at a desirable time or price. Changing regulatory, market or other conditions or environments (for example, the interest rate or credit environments) may adversely affect the liquidity of the Fund's investments. The Fund may have to accept a lower selling price for the holding, sell other investments, or forego another, more appealing investment opportunity. Judgment plays a larger role in valuing these investments as compared to valuing more liquid investments. Price volatility may be higher for illiquid investments as a result of, for example, the relatively less frequent pricing of such securities (as compared to liquid investments). Generally, the less liquid the market at the time the Fund sells a portfolio investment, the greater the risk of loss or decline of value to the Fund. Price volatility, liquidity of the market and other factors can lead to an increase in Fund redemptions, which may negatively impact Fund performance and NAV, including, for example, if the Fund is forced to sell securities in a down market.
Prospectus [2015] 5

Columbia  U.S. Social Bond Fund
Summary of the Fund (continued)
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. Under certain market conditions, debt securities may have greater price volatility than equity securities. An investment in the Fund could lose money over short or even long periods.
Municipal Securities Risk. Municipal securities are debt obligations generally issued to obtain funds for various public purposes, including general financing for state and local governments, or financing for a specific project or public facility, and include obligations of the governments of the U.S. territories, commonwealths and possessions such as Puerto Rico, the Virgin Islands, Guam and the Northern Mariana Islands to the extent such obligations are exempt from state and federal income taxes. Municipal securities may be fully or partially backed by the taxing authority of the local government, by the credit of a private issuer, by the current or anticipated revenues from a specific project or specific assets or by domestic or foreign entities providing credit support, such as letters of credit, guarantees or insurance, and are generally classified into general obligation bonds and special revenue obligations. General obligation bonds are backed by an issuer's taxing authority and may be vulnerable to limits on a government's power or ability to raise revenue or increase taxes. They may also depend for payment on legislative appropriation and/or funding or other support from other governmental bodies. Revenue obligations are payable from revenues generated by a particular project or other revenue source, and are typically subject to greater risk of default than general obligation bonds because investors can look only to the revenue generated by the project or other revenue source backing the project, rather than to the general taxing authority of the state or local government issuer of the obligations. Because many municipal securities are issued to finance projects in sectors such as education, health care, transportation and utilities, conditions in those sectors can affect the overall municipal market. Municipal securities generally pay interest that, in the opinion of bond counsel, is free from U.S. federal income tax (and, in some cases, the federal alternative minimum tax). There is no assurance that the Internal Revenue Service (IRS) will agree with this opinion or that U.S. federal income tax law will not change.
Certain of the municipalities or territories in which the Fund may invest have recently experienced significant financial difficulties. A credit rating downgrade relating to, default by, or insolvency or bankruptcy of, one or several municipal security issuers of a state, territory, commonwealth or possession in which the Fund invests could affect the market values and marketability of many or all municipal obligations of such state, territory, commonwealth or possession.
Non-Diversified Fund Risk. The Fund is non-diversified, which generally means that it will invest a greater percentage of its total assets in the securities of fewer issuers than a “diversified” fund. This increases the risk that a change in the value of any one investment held by the Fund could affect the overall value of the Fund more than it would affect that of a diversified fund holding a greater number of investments. Accordingly, the Fund's value will likely be more volatile than the value of a more diversified fund.
Prepayment and Extension Risk. Prepayment and extension risk is the risk that a loan, bond or other security or investment might, in the case of prepayment risk, be called or otherwise converted, prepaid or redeemed before maturity and, in the case of extension risk, the investment might not be called as expected, 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. In the case of mortgage- or asset-backed securities, 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.
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.
Sector Risk. At times, the Fund may have a significant portion of its assets invested in securities of companies conducting business in a related group of industries within an economic sector. Companies in the same economic sector may be similarly affected by economic, regulatory, political or market events or conditions, which may make the Fund more vulnerable to unfavorable developments in that economic sector than funds that invest more broadly. The more a Fund diversifies its investments, the more it spreads risk and potentially reduces the risks of loss and volatility.
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 Barclays Municipal Bond Index.
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Columbia U.S. Social Bond Fund
Summary of the Fund (continued)
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
James Dearborn   Senior Portfolio Manager and Head of Municipal Bonds   Co-manager   [______ 2015]
Chad Farrington, CFA   Senior Analyst, Head of Area and Portfolio Manager   Co-manager   [______ 2015]
Tom Murphy, CFA   Vice President, Senior Portfolio Manager and Head of Investment Grade Credit   Co-manager   [______ 2015]
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, sell or exchange shares of the Fund through 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 All accounts other than IRAs $2,000 $100
IRAs $1,000 $100
Class R4 All eligible accounts None N/A
Class R5 Combined underlying accounts of eligible registered investment advisers $100,000 N/A
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
Generally, a substantial portion of the Fund’s distributions consists of exempt-interest dividends, which are generally not taxable to you for federal income tax purposes or for purposes of the federal alternative minimum tax. A portion of the Fund’s distributions may not qualify as exempt-interest dividends; such distributions will generally be 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.
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Columbia  U.S. Social Bond Fund
Summary of the Fund (continued)
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 U.S. Social Bond Fund
More Information About the Fund
Investment Objective
Columbia U.S. Social Bond Fund (the Fund) seeks total return, consisting of current income and capital appreciation, through investments that seek to support and fund socially beneficial activities and developments, primarily in the U.S. 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
Under normal circumstances, the Fund invests at least 80% of its net assets (including the amount of any borrowings for investment purposes) in bonds and other debt securities of issuers whose principal activities are located in the United States and its territories. The investment manager determines if an issuer’s principal activities are located in the United States or its territories by considering the issuer’s country of organization, its primary stock exchange listing, the source of its revenues, the location of its assets and other factors.
Under normal market conditions, the Fund invests at least 60% of its net assets (including the amount of any borrowings for investment purposes) in bonds and other debt securities that pay interest exempt from U.S. federal income tax (but not necessarily the federal alternative minimum tax). These securities are issued by states and their political subdivisions, agencies, authorities and instrumentalities and by other qualified issuers. With respect to the Fund’s investments in municipal securities, the Fund will primarily focus on sectors that the investment manager believes are aimed toward positive environmental and social development such as education, healthcare, community services, housing, water, sewer and similar socially impactful sectors.
The Fund may invest up to 40% of its net assets (including the amount of any borrowings for investment purposes) in bonds and other debt securities issued by corporate and other non-governmental issuers. With respect to the portion of the Fund invested in corporate bonds, the Fund will primarily invest in bonds that, at the time of purchase, are investment grade or are unrated but determined to be of comparable quality. When selecting debt securities issued by corporate and other non-governmental issuers, the Fund’s investment manager will consider the sustainability and social impact of the issuer, its products and/or practices.
The Fund may invest 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 may from time to time emphasize one or more sectors in selecting its investments. The Fund may invest in fixed or variable-rate debt securities.
The Fund may invest in fixed income securities of any maturity and does not seek to maintain either a particular dollar-weighted average maturity or a particular duration. A bond is issued with a specific maturity date, which is the date when the issuer must pay back the bond’s principal (face value). Bond maturities range from less than 1 year to more than 30 years. Typically, the longer a bond’s maturity, the more price risk the Fund and the Fund’s investors face as interest rates rise, but the Fund could receive a higher yield in return for that longer maturity and higher interest rate risk. Duration measures the sensitivity of bond prices to changes in interest rates. The longer the duration of a bond, the more sensitive it will be to changes in interest rates. For example, a three-year duration means a bond is expected to decrease in value by 3% if interest rates rise 1% and increase in value by 3% if interest rates fall 1%.
Columbia Management Investment Advisers, LLC (the Investment Manager) evaluates a number of factors in identifying investment opportunities and constructing the Fund’s portfolio. The Investment Manager also considers local, national and global economic conditions, market conditions, interest rate movements and other relevant factors in allocating the Fund’s assets among maturities, issuers, credit sectors, industry sectors, states, and security characteristics such as coupon and call features.
The Investment Manager, in connection with selecting individual investments for the Fund, evaluates a security based on its potential to generate income and/or capital appreciation. The Investment Manager considers, among other factors, the creditworthiness of the issuer of the security and the various features of the security, such as its interest rate, yield, maturity, any call features and value relative to other securities. In addition to these factors, the Investment Manager will consider the expected social impact of an issuer’s activities, its products or services and the use of a security’s proceeds, as applicable.
The Investment Manager may sell a security if the Investment Manager believes that there is deterioration in the issuer’s financial circumstances, or that other investments are more attractive; if there is deterioration in a security’s credit rating; or for other reasons.
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Columbia  U.S. Social Bond Fund
More Information About the Fund (continued)
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 policy with respect to 80% of its net assets may be changed by the Board of Trustees without shareholder approval as long as shareholders are given 60 days advance written notice of the change.
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. The Fund is actively managed and its performance therefore will reflect, in part, the ability of the portfolio managers to make investment decisions that will achieve 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. Similarly, the Fund may underperform funds with similar investment objectives that seek a broader array of investments.
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.
Credit Risk. The value of fixed-income securities may decline if the issuer of the security defaults or otherwise becomes unable or unwilling, or is perceived to be unable or unwilling, to honor its financial obligations, such as making payments to the Fund when due. Various factors could affect the actual or perceived willingness or ability of the issuer to make timely interest or principal payments, including changes in the financial condition of the issuer or in general economic conditions. Fixed-income securities backed by an issuer's taxing authority may be subject to legal limits on the issuer's power to increase taxes or otherwise to raise revenue, or may be dependent on legislative appropriation or government aid. Certain fixed-income securities are backed only by revenues derived from a particular project or source, rather than by an issuer's taxing authority, and thus may have a greater risk of default. Rating agencies assign credit ratings to certain fixed-income securities to indicate their credit risk. Lower quality or unrated securities held by the Fund may present increased credit risk as compared to higher-rated securities. Non-investment grade fixed-income securities (commonly called “high-yield” or “junk”) are subject to greater price fluctuations and are more likely to experience a default than investment grade securities and therefore may expose the Fund to increased credit risk. If the Fund purchases unrated fixed-income securities, or if the ratings of securities held by the Fund are lowered after purchase, the Fund will depend on analysis of credit risk more heavily than usual.
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 experience greater price fluctuations in response 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 are generally 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. High-yield 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.
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 tend to fall, and if interest rates fall, the values of debt securities 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 will usually 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
10 Prospectus [2015]

Columbia U.S. Social Bond Fund
More Information About the Fund (continued)
prepayment risk. Similarly, a period of rising interest rates may negatively impact the Fund’s performance. Actions by governments and central banking authorities can result in increases in interest rates. Such actions may negatively affect the value of fixed-income securities held by the Fund, resulting in a negative impact on the Fund's performance and NAV.
Liquidity Risk. Liquidity risk is the risk associated with a lack of marketability of investments which may make it difficult to sell the investment at a desirable time or price. Changing regulatory, market or other conditions or environments (for example, the interest rate or credit environments) may adversely affect the liquidity of the Fund's investments. The Fund may have to accept a lower selling price for the holding, sell other investments, or forego another, more appealing investment opportunity. Judgment plays a larger role in valuing these investments as compared to valuing more liquid investments. Price volatility may be higher for illiquid investments as a result of, for example, the relatively less frequent pricing of such securities (as compared to liquid investments). Generally, the less liquid the market at the time the Fund sells a portfolio investment, the greater the risk of loss or decline of value to the Fund. Price volatility, liquidity of the market and other factors can lead to an increase in Fund redemptions, which may negatively impact Fund performance and NAV, including, for example, if the Fund is forced to sell securities in a down market.
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 actual or perceived factors affecting an issuer (e.g., an unfavorable earnings report), the industry or sector in which it operates, or the market as a whole, which may reduce the value of an investment in the Fund. Under certain market conditions, debt securities may have greater price volatility than equity securities. Accordingly, an investment in the Fund could lose money over short or long periods. The market values of the securities the Fund holds can be affected by changes or perceived changes in U.S. or foreign economies and financial markets, and the liquidity of these securities, among other factors.
Municipal Securities Risk. Municipal securities are debt obligations generally issued to obtain funds for various public purposes, including general financing for state and local governments, or financing for a specific project or public facility, and include obligations of the governments of the U.S. territories, commonwealths and possessions such as Puerto Rico, the Virgin Islands, Guam and the Northern Mariana Islands to the extent such obligations are exempt from state and federal income taxes. Municipal securities can be significantly affected by political and legislative changes at the state or federal level. Municipal securities may be fully or partially backed by the taxing authority of the local government, by the credit of a private issuer, by the current or anticipated revenues from a specific project or specific assets or by domestic or foreign entities providing credit support, such as letters of credit, guarantees or insurance, and are generally classified into general obligation bonds and special revenue obligations. General obligation bonds are backed by an issuer's taxing authority and may be vulnerable to limits on a government's power or ability to raise revenue or increase taxes. They may also depend for payment on legislative appropriation and/or funding or other support from other governmental bodies. Revenue obligations are payable from revenues generated by a particular project or other revenue source, and are typically subject to greater risk of default than general obligation bonds because investors can look only to the revenue generated by the project or other revenue source backing the project, rather than to the general taxing authority of the state or local government issuer of the obligations. Because many municipal securities are issued to finance projects in sectors such as education, health care, transportation and utilities, conditions in those sectors can affect the overall municipal market. Municipal securities generally pay interest that, in the opinion of bond counsel, is free from U.S. federal income tax (and, in some cases, the federal alternative minimum tax). There is no assurance that the Internal Revenue Service (IRS) will agree with this opinion or that U.S. federal income tax law will not change. In the event the IRS determines that the issuer does not comply with relevant tax requirements or U.S. federal income tax law changes, interest payments from a security could become federally taxable, possibly retroactively to the date the security was issued, and the value of the security would likely fall. As a shareholder of the Fund, you may be required to file an amended tax return and pay additional taxes as a result. The amount of publicly available information for municipal issuers is generally less than for corporate issuers.
Certain of the municipalities or territories in which the Fund may invest have recently experienced significant financial difficulties. A credit rating downgrade relating to, default by, or insolvency or bankruptcy of, one or several municipal security issuers of a state, territory, commonwealth or possession in which the Fund invests could affect the market values and marketability of many or all municipal obligations of such state, territory, commonwealth or possession.
Prospectus [2015] 11

Columbia  U.S. Social Bond Fund
More Information About the Fund (continued)
Non-Diversified Fund Risk. The Fund is non-diversified, which generally means that it will invest a greater percentage of its total assets in the securities of fewer issuers than a “diversified” fund. This increases the risk that a change in the value of any one investment held by the Fund could affect the overall value of the Fund more than it would affect that of a diversified fund holding a greater number of investments. Accordingly, the Fund's value will likely be more volatile than the value of a more diversified fund.
Prepayment and Extension Risk. Prepayment 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 extension risk is the risk that the investment might not be called as expected. In the case of prepayment risk, 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, in the case of extension risk, as interest rates rise or spreads widen, the likelihood of prepayment decreases and the maturity of the investment may extend the life of the investment 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.
Sector Risk. At times, the Fund may have a significant portion of its assets invested in securities of companies conducting business in a related group of industries within an economic sector. Companies in the same economic sector may be similarly affected by economic, regulatory, political or market events or conditions, which may make the Fund more vulnerable to unfavorable developments in that economic sector than funds that invest more broadly. The more a Fund diversifies its investments, the more it spreads risk and potentially reduces the risks of loss and volatility.
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. Information on the Fund’s holdings can be found in the Fund’s shareholder reports or by visiting columbiamanagement.com.
Transactions in Derivatives
The Fund may enter into derivative transactions or otherwise have exposure to derivative transactions through underlying investments. 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
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More Information About the Fund (continued)
Fund's potential inability to terminate or to sell derivative positions. A 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”, and provides asset-allocation services to (i) shareholders by investing in shares of other Columbia Funds, which may include the Fund (collectively referred to in this section as Underlying Funds), and (ii) 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 large positions of certain affiliated products, the Underlying Funds may experience relatively large inflows and outflows of cash due to affiliated products’ purchases and sales of Underlying Fund shares. 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 portfolio securities to manage the cash flow effect related to 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 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 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.
Lending of Portfolio Securities
The Fund may lend portfolio securities to broker-dealers or other financial intermediaries on a fully collateralized basis in order to earn additional income. The Fund may lose money from securities lending if, for example, it is delayed in or prevented from selling the collateral after the loan is made or recovering the securities loaned or if it incurs losses on the reinvestment of cash collateral.
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Columbia  U.S. Social Bond Fund
More Information About the Fund (continued)
The Fund currently does not participate in the securities lending program but the Board of Trustees (the Board) may determine to renew participation in the future. For more information on lending of portfolio securities and the risks involved, see the Fund’s SAI and its annual and semiannual reports to shareholders.
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.
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 its benchmark(s). In addition, the Fund may invest in securities outside any 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.
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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.
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 [__________], 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 U.S. Social Bond Fund
Class A [_____]%
Class C [_____]%
Class R4 [_____]%
Class R5 [_____]%
Class Z [_____]%
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.
Prospectus [2015] 15

Columbia  U.S. Social Bond Fund
More Information About the Fund (continued)
Primary Service Providers
The Investment Manager, which also serves as the Fund’s administrator (the 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 the 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, determining what securities and other investments the Fund should buy or sell and executing portfolio transactions. The Investment Manager may use the research and other capabilities of its affiliates and third parties in managing the Fund’s investments.
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 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.