Summary
Prospectus
May 1, 2016
Columbia Acorn Family of Funds
Managed by Columbia Wanger Asset Management, LLC
Columbia Thermostat FundSM
| Class | Ticker Symbol | |
| Class A Shares | CTFAX | |
| Class C Shares | CTFDX | |
| Class R4 Shares | CTORX | |
| Class R5 Shares | CQTRX | |
| Class Y Shares | CYYYX | |
| Class Z Shares | COTZX |
Before you invest, you may want to review the Fund’s Prospectus, which
contains more information about the Fund and its risks. You can find the Fund’s Prospectus, Statement of Additional Information and other information about the Fund online at
https://www.columbiathreadneedleus.com/web/columbia/forms-literature/fund-literature. You can also get this information at no cost by calling 800.345.6611 or by sending an email to serviceinquiries@columbiathreadneedle.com. This Summary Prospectus
incorporates by reference the Fund’s Prospectus and Statement of Additional Information, both dated May 1, 2016.
As with all mutual funds, the Securities and Exchange
Commission has not approved or disapproved these securities or passed upon the adequacy of this prospectus. Any representation to the contrary is a criminal offense.
Investment Objective
Columbia Thermostat FundSM (the Fund) seeks long-term capital appreciation.
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 42 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, Y 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 R4 | Class R5 | Class Y | Class Z | |
| Management fees | 0.10% | 0.10% | 0.10% | 0.10% | 0.10% | 0.10% |
| Distribution and/or service (12b-1) fees | 0.25% | 1.00% | 0.00% | 0.00% | 0.00% | 0.00% |
| Other expenses | 0.17% | 0.17% | 0.18% | 0.15% | 0.10% | 0.16% |
| Acquired fund fees and expenses | 0.52% | 0.52% | 0.52% | 0.52% | 0.52% | 0.52% |
| Total annual Fund operating expenses(c) | 1.04% | 1.79% | 0.80% | 0.77% | 0.72% | 0.78% |
| Fee waivers and/or expense reimbursements(d) | (0.02%) | (0.02%) | (0.03%) | (0.01%) | (0.01%) | (0.01%) |
| Total annual Fund operating expenses after fee waivers and/or expense reimbursements | 1.02% | 1.77% | 0.77% | 0.76% | 0.71% | 0.77% |
| (a) | This charge is imposed on certain investments of between $1 million and $50 million redeemed within 18 months after purchase, as follows: 1.00% if redeemed within 12 months after 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 12 months after purchase, with certain limited exceptions. |
| (c) | “Total annual Fund operating expenses” include acquired fund (Portfolio Fund) fees and expenses (expenses the Fund incurs indirectly through its investments in other funds) and may be higher than “Total Net Expenses” shown in the Financial Highlights section of this prospectus because “Total Net Expenses” do not include Portfolio Fund (acquired fund) fees and expenses. |
| (d) | Columbia Wanger Asset Management, LLC (the Investment Manager) has contractually agreed to waive fees and reimburse certain expenses of the Fund so that ordinary operating expenses (excluding transaction costs and certain other investment-related expenses, interest and fees on borrowings and expenses associated with the Fund’s investment in the Portfolio Funds (acquired funds)), do not exceed the annual rates of 0.50% for Class A shares, 1.25% for Class C shares, 0.25% for Class R4 shares, 0.24% for Class R5 shares, 0.19% for Class Y shares and 0.25% for Class Z shares, through April 30, 2017. This arrangement may only be modified or amended with approval from the Fund and the Investment Manager. |
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. |
| 1 | Columbia Thermostat FundSM |
Since the waivers and/or reimbursements
shown in the Annual Fund Operating Expenses table above expire as indicated in the preceding table, they are only reflected in the 1 year example and the first year of the other examples. Although your actual
costs may be higher or lower, based on the assumptions listed above, your costs would be:
| 1 year | 3 years | 5 years | 10 years | |
| Class A (whether or not shares are redeemed) | $673 | $885 | $1,114 | $1,771 |
| Class C (assuming redemption of all shares at the end of the period) | $280 | $561 | $ 968 | $2,104 |
| Class C (assuming no redemption of shares) | $180 | $561 | $ 968 | $2,104 |
| Class R4 (whether or not shares are redeemed) | $ 79 | $252 | $ 441 | $ 987 |
| Class R5 (whether or not shares are redeemed) | $ 78 | $245 | $ 427 | $ 953 |
| Class Y (whether or not shares are redeemed) | $ 73 | $229 | $ 400 | $ 894 |
| Class Z (whether or not shares are redeemed) | $ 79 | $248 | $ 432 | $ 965 |
Portfolio Turnover
The Fund will indirectly bear the expenses associated with
portfolio turnover of the underlying Portfolio Funds in which the Fund invests. Each Portfolio Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A Portfolio Fund’s
higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when its 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. During the most recent fiscal year, the Fund’s portfolio turnover rate was 69% of the average value of its portfolio.
Principal Investment Strategies
The Fund is primarily managed as a fund that invests in other
funds (i.e., a “fund-of-funds”) that seeks to achieve its investment objective by investing its assets among a selected group of underlying stock and bond mutual funds for which Columbia Wanger Asset Management, LLC, the Fund’s
investment adviser (the Investment Manager) or its affiliates, including Columbia Management Investment Advisers, LLC, serves as investment adviser or principal underwriter (the Portfolio Funds). Under normal circumstances, the Fund allocates at
least 95% of its net assets (stock/bond assets) among the Portfolio Funds according to the current level of Standard & Poor’s (S&P)
500® Index. Generally, when the S&P 500®
Index goes up in relation to predetermined ranges set by the Investment Manager, the Fund sells a portion of its stock funds and invests more in the bond funds and when the S&P 500® Index goes down in relation to the ranges, the Fund increases its investment in the stock funds. Under normal circumstances, the Fund may invest up to
5% of net assets plus any cash received that day in cash, high quality short-term paper and government securities.
Many asset allocation funds typically move assets from stocks
to bonds when the market goes up, and from bonds to stocks when the market goes down. Most asset allocation funds are run by sophisticated investment professionals, who make subjective decisions based on economic and financial data and complex
graphs of market behavior. By contrast, the day-to-day investment decisions for the Fund are made according to a single predetermined rule. The temperature in your house is run by a single rule: your thermostat turns on the furnace if your house is
too cold or turns on the air conditioner if your house is too warm. This Fund works the same way, so it is named Columbia Thermostat Fund.
Because the Fund invests according to a pre-set program, there
is no need for subjective day-to-day management. Although another successful asset allocation strategy might do better than the Fund, the Fund is designed for those who doubt the wisdom of trying to “time” the market and are unsure of
the long-term trend of the stock market. The Fund takes psychology out of investing; it avoids the temptation to buy more stocks because the stock market is currently going up or to sell stocks because the market is declining. The Fund operates
continuously and substantially automatically, subject to periodic review of the pre-set program by the Investment Manager and the Fund’s Board of Trustees. As described more fully below, the Investment Manager has the authority to review the
structure and allocation ranges of the stock/bond allocation table and to make any changes considered appropriate.
The Investment Manager chooses the Portfolio Funds to provide
participation in the major sectors of the stock market and the portions of the bond market it believes will preserve capital and generate returns. If you believe that the stock market will tend to go up most of the time, then you should probably own
a fully invested stock fund and use a buy-and-hold strategy. Buy-and-hold was an excellent strategy in the 1982-1999 bull market. However, there have been long periods in the past when buy-and-hold was not the best strategy, such as 1930-1954 and
1969-1981, when the market fluctuated but did not make significant new highs. The Fund may be a good investment choice for you if you believe that the market will fluctuate significantly and provide modest to no secular growth for many
years.
| Columbia Thermostat FundSM | 2 |
The Fund invests its stock/bond assets among the Portfolio
Funds according to an asset allocation table. The Investment Manager calibrates the allocation table such that stock percentages vary inversely with price-to-earnings ratios on “normalized” (long-term) earnings. Within a range of
10% to 90%, stock percentages rise towards maximum allocations as such price-to-earnings ratios fall towards historical lows, and stock percentages fall as such price-to-earnings ratios rise towards historical highs.
The Fund’s current allocation table is set forth
below.
| Stock/Bond Allocation Table | ||
| How
the Fund will Invest the Stock/Bond Assets | ||
| Level
of the S&P 500® Index |
Stock
Percentage |
Bond
Percentage |
| over 2250 | 10% | 90% |
| over 2175 – 2250 | 15% | 85% |
| over 2100 – 2175 | 20% | 80% |
| over 2025 – 2100 | 25% | 75% |
| over 1950 – 2025 | 30% | 70% |
| over 1875 – 1950 | 35% | 65% |
| over 1800 – 1875 | 40% | 60% |
| over 1725 – 1800 | 45% | 55% |
| over 1650 – 1725 | 50% | 50% |
| over 1575 – 1650 | 55% | 45% |
| over 1500 – 1575 | 60% | 40% |
| over 1425 – 1500 | 65% | 35% |
| over 1350 – 1425 | 70% | 30% |
| over 1275 – 1350 | 75% | 25% |
| over 1200 – 1275 | 80% | 20% |
| over 1125 – 1200 | 85% | 15% |
| 1125 and under | 90% | 10% |
When the S&P 500® Index moves into a new band on the table, the Fund will rebalance the stock/bond mix to reflect the new S&P 500® Index price level by redeeming shares of some Portfolio Funds and purchasing shares of other Portfolio Funds. Any such rebalancing typically will be
implemented promptly. However, there are two circumstances when a rebalancing may be implemented over a longer timeline. First, when a rebalancing or allocation table change would trigger a 10% point or greater change in stock and bond allocations
or individual Portfolio Funds, the rebalancing may be implemented over a period of up to two weeks, if deemed by the Investment Manager to be in the best interest of shareholders. The second exception is a “31-day Rule;” in order to
reduce taxable events, after the Fund has increased its percentage allocation to either stock funds or bond funds, it will not decrease that allocation for at least 31 days. Following a change in the Fund's stock/bond mix, if the S&P 500® Index remains within the same band for a while, normal market fluctuations will change the values of the Fund's holdings of stock Portfolio Funds and
bond Portfolio Funds. The Investment Manager will invest cash flows from sales (or redemptions) of Fund shares to bring the stock/bond mix back toward the allocation percentages for that S&P 500® Index band. For example, if the S&P 500®
Index is in the 1350-1425 band, and the value of the holdings of the stock Portfolio Funds has dropped to 68% of the value of the holdings of all Portfolio Funds, the Investment Manager would invest new cash in the stock Portfolio Funds (or cash for
redemptions would come from the bond Portfolio Funds). If the 31-day Rule is in effect, the Investment Manager will invest new cash at the stock/bond percentage allocation as of the latest rebalancing.
As an illustrative example, suppose the following:
| Date | Level
of the S&P 500® Index |
How
the Fund will invest the Stock/ Bond Assets |
| Nov. 1 | We begin when the market is 1705 | 50% stocks, 50% bonds |
| Dec. 1 | The S&P 500® goes to 1726 | rebalance 45% stocks, 55% bonds |
| Dec. 6 | The S&P 500® drops back to 1715 | no reversal for 31 days |
| Jan. 2 | The S&P 500® is at 1660 | rebalance 50% stocks, 50% bonds |
| 3 | Columbia Thermostat FundSM |
| Date | Level
of the S&P 500® Index |
How
the Fund will invest the Stock/ Bond Assets |
| Jan. 20 | The S&P 500® drops to 1645 | rebalance 55% stocks, 45% bonds |
| The market has made a continuation move by going through a second action level, not a reversal move, so the 31-day Rule does not apply in this case. | ||
| Jan. 30 | The S&P 500® goes up to 1651 | no reversal for 31 days |
| Feb. 20 | The S&P 500® is at 1660 | rebalance 50% stocks, 50% bonds |
The following
table shows the seven stock Portfolio Funds and four bond Portfolio Funds that the Fund currently uses in its “fund-of-funds” structure and the current allocation percentage for each Portfolio Fund within the stock or bond category. As
described more fully below, the Investment Manager may substitute or add additional Portfolio Funds at any time, including funds introduced after the date of this prospectus. The allocation percentage within each stock/bond category is achieved by
rebalancing the investments within the category whenever the S&P 500® Index moves into a new band on the allocation table, subject to the 31-day
Rule described above. The Fund does not liquidate its investment in one Portfolio Fund in order to invest in another Portfolio Fund except in connection with a rebalancing due to a move of the S&P 500® Index into a new band (or due to a change by the Investment Manager in the stock/bond allocation table to the Portfolio Funds or to the relative
allocation among them). Until a subsequent rebalancing, the Fund's investments in, and redemptions from, the stock Portfolio Funds or the bond Portfolio Funds are allocated among the Portfolio Funds in a manner that will reduce any deviation of the
relative values of the Fund's holdings of the Funds from the allocation percentages shown below.
| Allocation of Stock/Bond Asset Within Asset Classes | ||
| Type of Fund | Allocation | |
| Stock Funds | ||
| Columbia Acorn® Fund | Small/Mid-cap growth | 10% |
| Columbia Acorn International® | Small/Mid-cap international growth | 20% |
| Columbia Acorn SelectSM | Mid-cap growth | 10% |
| Columbia Contrarian Core Fund | Large-cap blend | 20% |
| Columbia Dividend Income Fund | Large-cap value | 20% |
| Columbia Large Cap Enhanced Core Fund | Large-cap blend | 10% |
| Columbia Select Large Cap Growth Fund | Large-cap growth | 10% |
| Total | 100% | |
| Bond Funds | Type of Fund | Allocation |
| Columbia Income Opportunities Fund | High-yield bond | 10% |
| Columbia Short Term Bond Fund | Short term bond | 40% |
| Columbia Total Return Bond Fund | Intermediate-term bond | 20% |
| Columbia U.S. Government Mortgage Fund | Government bond | 20% |
| Columbia U.S. Treasury Index Fund | U.S. Treasury notes/bonds | 10% |
| Total | 100% | |
See the Portfolio Funds Summary section of this prospectus for information about the Portfolio Funds’ investment objectives and principal investment strategies.
The Investment Manager has the authority to review the
Portfolio Funds and the relative stock/bond allocation percentages among them and to make any changes considered appropriate.
Each of the Portfolio Funds is currently managed by the
Investment Manager or its affiliates. The Fund does not pay any sales load on its purchases of shares of the Portfolio Funds. On an annual basis, or on an “emergency” basis if necessary, the Investment Manager reviews the structure,
allocation percentages and Portfolio Funds and makes any changes considered appropriate. The Investment Manager typically addresses the following questions:
| ■ | Should the stock/bond allocation table be revised (perhaps because the stock market has made a long-term move outside of the bands set forth above)? |
| ■ | Should there be a change in the Portfolio Funds or should there be a change in the percentage allocations among the stock/bond funds (perhaps because of a change of portfolio managers, change of investment style, change in relative valuation or a reorganization of a Portfolio Fund)? |
| Columbia Thermostat FundSM | 4 |
Any such changes by the Investment Manager are expected to be
infrequent.
Principal Risks
An investment in the Fund involves risk, including general
risks relating to the investment in the Fund based on its investment process and its "fund-of-funds" structure, as well as specific risks related to the individual Portfolio Funds, 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.
Allocation Risk. The Investment Manager uses an asset allocation strategy in pursuing the Fund’s investment objective. There is a risk that the Fund's allocation among asset classes or investments will cause the Fund's shares to
lose value or cause the Fund to underperform other funds with similar investment objectives and/or strategies, or that the investments themselves will not produce the returns expected.
Fund-of-Funds Risk.
Determinations regarding asset classes or underlying funds and the Fund’s allocations thereto may not successfully achieve the Fund’s investment objective, in whole or in part. The ability of the Fund to realize its investment objective
will depend, in large part, on the extent to which the underlying funds realize their investment objective. There is no guarantee that the underlying funds will achieve their respective investment objectives. The Fund is exposed to the same risks as
the underlying funds in direct proportion to the allocation of its assets among the underlying funds. By investing in a combination of underlying funds, the Fund has exposure to the risks of many areas of the market. The performance of underlying
funds could be adversely affected if other entities that invest in the same underlying funds make relatively large investments or redemptions in such underlying funds. The Fund, and its shareholders, indirectly bear a portion of the expenses of any
funds in which the Fund invests. Because the expenses and costs of each underlying fund are shared by its investors, redemptions by other investors in an underlying fund could result in decreased economies of scale and increased operating expenses
for such fund. The Investment Manager may have potential conflicts of interest in selecting affiliated funds over unaffiliated funds for investment by the Fund, and may also face potential conflicts of interest in selecting affiliated funds, because
the fees the Investment Manager receives from some underlying funds may be higher than the fees paid by other underlying funds. Further, because of the Investment Manager’s confidence in its own strategies, investment philosophy and
capacities, it will, in selecting underlying funds, at times prefer a fund in the Columbia Acorn Family of Funds over alternative investments. There can be no assurance, however, that a fund in the Columbia Acorn Family of Funds selected for
inclusion in Columbia Thermostat Fund’s portfolio will, in fact, outperform similar funds managed by the Investment Manager’s affiliates.
The Fund is subject indirectly to the following risks of the
Portfolio Funds:
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.
Interest Rate
Risk. Interest rate risk is the risk of losses attributable to changes in interest rates. In general, if prevailing interest rates (which are at historic lows as of the date of this prospectus) rise, the values of
loans and other fixed-income instruments tend to fall, and if interest rates fall, the values of loans and other fixed-income instruments tend to rise. Changes in the value of a fixed-income instrument usually will not affect the amount of income
the Fund receives from it but will generally affect the value of the Fund's shares. In general, the longer the maturity or duration of a fixed-income instrument, 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 instruments held by the Fund, resulting in a negative impact on the Fund's performance and NAV. Securities with floating interest rates are typically
less sensitive to interest rate changes, but may decline in value if their interest rates do not rise as much as interest rates in general. Because rates on certain floating rate loans and other debt securities reset only periodically, changes in
prevailing interest rates (and particularly sudden and significant changes) can be expected to cause fluctuations in the Fund’s NAV. Any interest rate increases could cause the value of the Fund’s investments in fixed-income instruments
to decrease. Rising interest rates may prompt redemptions from the Fund, which may force the Fund to sell investments at a time when it is not advantageous to do so, which could result in losses.
Credit Risk. Credit risk is
the risk that the value of loans or other debt instruments may decline if the issuer thereof 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 fixed-income instruments
| 5 | Columbia Thermostat FundSM |
(commonly called “high-yield” or “junk”) may be
subject to greater price fluctuations and are more likely to experience a default than investment grade fixed-income instruments 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 Investments Risk.
Securities and other debt instruments held by the Fund that are rated below investment grade (commonly called “high-yield” or “junk” bonds) and unrated debt instruments 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 debt instruments. In addition, these investments have greater price fluctuations, are less liquid and are more likely
to experience a default than higher-rated debt instruments. High-yield debt instruments are considered to be predominantly speculative with respect to the issuer’s capacity to pay interest and repay principal.
Value Securities Risk.
Value securities are securities of companies that may have experienced, for example, adverse business, industry or other developments or may be subject to special risks that have caused the securities to be out of favor and, in turn, potentially
undervalued. The market value of a portfolio security may not meet the Investment Manager’s perceived value assessment of that security, or may decline in price, even though the Investment Manager believes the securities are already
undervalued. There is also a risk that it may take longer than expected for the value of these investments to rise to the portfolio manager’s perceived value. In addition, value securities, at times, may not perform as well as growth
securities or the stock market in general, and may be out of favor with investors for varying periods of time.
Growth Securities Risk. Growth
securities typically trade at a higher multiple of earnings than other types of equity securities. Accordingly, the market values of growth securities may never reach their expected market value and may decline in price. In addition,
growth securities, at times, may not perform as well as value securities or the stock market in general, and may be out of favor with investors for varying periods of time.
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. Generally, the more the Fund diversifies its
investments, the more it spreads risk and potentially reduces the risks of loss and volatility.
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. In addition, foreign governments may impose 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.
Operational and Settlement Risks
of Foreign Securities. The Fund’s foreign securities are generally held outside the United States in the primary market for the securities in the custody of foreign sub-custodians. Some countries have limited
governmental oversight and regulation, which increases the risk of corruption and fraud and the possibility of losses to the Fund. In particular, under certain circumstances, foreign securities may settle on a delayed delivery basis, meaning that
the Fund may be required to make payment for securities before the Fund has actually received delivery of the securities or deliver securities prior to the receipt of payment. As a result, there is a risk that the security will not be delivered to
the Fund or that payment will not be received. Losses can also result from lost, stolen or counterfeit securities; defaults by brokers and banks; failures or defects of the settlement system; or poor and improper record keeping by registrars and
issuers.
Share Blocking. In certain non-U.S. markets, an issuer’s securities are blocked from trading for a specified number of days before and, in certain instances, after a shareholder meeting. The blocking period can last up to several
weeks. Share blocking may prevent the Fund from buying or selling securities during this period. As a consequence of these restrictions, the Investment Manager, on behalf of the Fund, may abstain from voting proxies in markets that require share
blocking.
Emerging Market Securities Risk. Securities issued by foreign governments or companies in emerging market countries, such as China, 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
| Columbia Thermostat FundSM | 6 |
usually less mature and their securities markets are typically less developed
with more limited trading activity (i.e., lower trading volumes and less liquidity) than more developed countries. Emerging market securities tend to be more volatile than securities in more developed markets. Many emerging market countries are
heavily dependent on international trade and have fewer trading partners, which makes them more sensitive to world commodity prices and economic downturns in other countries, and some have a higher risk of currency devaluations.
Operational and Settlement Risks of Securities in Emerging
Markets. Foreign sub-custodians in emerging markets may be recently organized, lack extensive operating experience or lack effective government oversight or regulation. In addition, there may be legal restrictions or
limitations on the ability of the Fund to recover assets held in custody by a foreign sub-custodian in the event of the bankruptcy of the sub-custodian. There may also be a greater risk that settlement may be delayed and that cash or securities of
the Fund may be lost because of failures of or defects in the system, including fraud or corruption. Settlement systems in emerging markets also have a higher risk of failed trades.
Risks Related to Currencies and Corporate Actions in Emerging
Markets. Risks related to currencies and corporate actions are also greater in emerging market countries than in developed countries. Emerging market currencies may not be traded and are subject to a higher risk of
currency devaluations.
Risks Related to Corporate
and Securities Laws in Emerging Markets. Securities laws in emerging markets may be relatively new and unsettled and, consequently, there is a risk of rapid and unpredictable change in laws regarding foreign
investment, securities regulation, title to securities and shareholder rights.
Liquidity and Trading Volume Risk. Due to market conditions, including uncertainty regarding the price of a security, it may be difficult for the Fund to buy or sell portfolio securities at a desirable time or price, which could result in investment
losses. This risk of portfolio illiquidity is heightened with respect to small- and mid-cap securities, generally, and foreign small- and mid-cap securities in particular. The Fund may have to lower the selling price, liquidate other investments, or
forego another, more appealing investment opportunity as a result of illiquidity in the markets. As a result of significant and sustained reductions in emerging and developed international market trading volumes in the wake of the 2007-2009
financial crisis, it may take longer to buy or sell securities, which can exacerbate the Fund’s exposure to volatile markets. The Fund may also be limited in its ability to execute favorable trades in portfolio securities in response to
changes in share prices and fundamentals, and may be forced to dispose of securities under disadvantageous circumstances and at a loss. As the Fund grows in size or, conversely, if it faces significant redemption pressure, these considerations take
on increasing significance and may adversely impact performance.
Foreign Currency Risk. The
performance of the Fund may be materially affected positively or negatively by foreign currency 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.
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.
Derivatives Risk. Derivatives
may involve significant risks. Derivatives are financial instruments with a value in relation to, or derived from, the value of an underlying asset(s) or other reference, such as an index, rate or other economic indicator (each an underlying
reference). Derivatives may include those that are privately placed or otherwise exempt from SEC registration, including that certain Rule 144A eligible securities may be derivatives. Derivatives could result in Fund losses if the underlying
reference does not perform as anticipated. Use of derivatives is a highly specialized activity that can involve investment techniques, risks, and tax planning different from those associated with more traditional investment instruments. A
Fund’s derivatives strategy may not be successful and use of certain derivatives could result in substantial, potentially unlimited, losses to the Fund regardless of the Fund’s actual investment. A relatively small movement in the price,
rate or other economic indicator associated with the underlying reference may result in substantial loss for the Fund. Derivatives may be more volatile than other types of investments. The value of derivatives may be influenced by a variety of
factors, including national and international political and economic developments. Potential changes to the regulation of the derivatives markets may make
| 7 | Columbia Thermostat FundSM |
derivatives more costly, may limit the market for derivatives, or may
otherwise adversely affect the value or performance of derivatives. Derivatives can increase the Fund’s risk exposure to underlying references and their attendant risks, such as credit risk, market risk, foreign currency risk and interest rate
risk, while exposing the Fund to correlation risk, counterparty risk, hedging risk, leverage risk, liquidity risk, pricing risk and volatility risk.
Convertible Securities Risk.
Convertible securities are subject to the usual risks associated with debt instruments, 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.
Forward Commitments on Mortgage-Backed Securities (including
Dollar Rolls) Risk. When purchasing mortgage-backed securities in the “to be announced” (TBA) market (MBS TBAs), the seller agrees to deliver mortgage-backed securities for an agreed upon price on an
agreed upon date, but may make no guarantee as to the specific securities to be delivered. In lieu of taking delivery of mortgage-backed securities, the Fund could enter into dollar rolls, which are transactions in which the Fund sells securities to
a counterparty and simultaneously agrees to purchase those or similar securities in the future at a predetermined price. Dollar rolls involve the risk that the market value of the securities the Fund is obligated to repurchase may decline below the
repurchase price, or that the counterparty may default on its obligations. These transactions may also increase the Fund’s portfolio turnover rate. If the Fund reinvests the proceeds of the security sold, the Fund will also be subject to the
risk that the investments purchased with such proceeds will decline in value (a form of leverage risk). MBS TBAs and dollar rolls are subject to the risk that the counterparty to the instrument may not perform or be unable to perform in accordance
with the terms of the instrument.
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.
Stripped Securities Risk.
Stripped securities are the separate income or principal components of debt securities. These securities are particularly sensitive to changes in interest rates, and therefore subject to greater fluctuations in price than typical interest bearing
debt securities.
Prepayment and Extension Risk. Prepayment and extension risk is the risk that a 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. In the case of prepayment risk, if the investment is converted, prepaid or redeemed before maturity, 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.
Depositary Receipts Risk.
Depositary receipts are receipts issued by a bank or trust company reflecting ownership of underlying securities issued by foreign companies. Some foreign securities are traded in the form of American Depositary Receipts (ADRs). Depositary receipts
involve risks similar to the risks associated with investments in foreign securities, including those associated with investing in the particular country of an issuer, which may be related to the particular political, regulatory, economic, social
and other conditions or events occurring in the country and fluctuations in its currency, as well as market risk tied to the underlying foreign company. In addition, ADR
| Columbia Thermostat FundSM | 8 |
holders may have limited voting rights, may not have the same rights afforded
typical company stockholders in the event of a corporate action such as an acquisition, merger or rights offering and may experience difficulty in receiving company stockholder communications.
Derivatives Risk – Futures Contracts Risk. A futures contract is an exchange-traded derivative transaction between two parties in which a buyer agrees to pay a fixed price (or rate) at a specified future date for delivery of an underlying reference from a
seller. Certain futures contract markets are highly volatile, and futures contracts may be illiquid. Futures exchanges may limit fluctuations in futures contract prices by imposing a maximum permissible daily price movement. The Fund may be
disadvantaged if it is prohibited from executing a trade outside the daily permissible price movement. At or prior to maturity of a futures contract, the Fund may enter into an offsetting contract and may incur a loss to the extent there has been
adverse movement in futures contract prices. The liquidity of the futures markets depends on participants entering into offsetting transactions rather than making or taking delivery. To the extent participants make or take delivery, liquidity in the
futures market could be reduced. Because of the low margin deposits normally required in futures trading, a high degree of leverage is typical of a futures trading account. As a result, a relatively small price movement in a futures contract may
result in substantial losses to the Fund, exceeding the amount of the margin paid. For certain types of futures contracts, losses are potentially unlimited. Futures markets are highly volatile and the use of futures may increase the volatility of
the Fund’s net asset value. Futures contracts executed on foreign exchanges may not provide the same protection as U.S. exchanges. Futures contracts can increase the Fund’s risk exposure to underlying references and their attendant
risks, such as credit risk, market risk, foreign currency risk and interest rate risk, while also exposing the Fund to correlation risk, counterparty risk, hedging risk, leverage risk, liquidity risk, pricing risk and volatility risk.
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 (less expenses) by the Fund on the securities it holds. If the Fund does not
receive any such income and/or dividends, the Fund may not be in a position to make distributions to shareholders. If the interest income and/or dividends the Fund receives from its investments decline, the Fund may have to reduce its distribution
level.
Rule 144A and Other Exempted Securities
Risk. The Fund may invest in privately placed and other securities or instruments exempt from SEC registration (collectively “private placements”), subject to liquidity and other regulatory restrictions.
In the U.S. market, private placements are typically sold only to qualified institutional buyers, or qualified institutional purchasers, as applicable. An insufficient number of buyers interested in purchasing private placements at a particular time
could affect adversely the marketability of such investments and the Fund might be unable to dispose of them promptly or at reasonable prices, subjecting the Fund to liquidity risk. The Fund may invest in private placements determined to be liquid
as well as those determined to be illiquid. Even if determined to be liquid, the Fund’s holdings of private placements may increase the level of Fund illiquidity if eligible buyers are unable or unwilling to purchase them at a particular time.
Issuers of Rule 144A eligible securities are required to furnish information to potential investors upon request. However, the required disclosure is much less extensive than that required of public companies and is not publicly available since the
offering is not filed with the SEC. Further, issuers of Rule 144A eligible securities can require recipients of the information (such as the Fund) to agree contractually to keep the information confidential, which could also adversely affect the
Fund’s ability to dispose of the security.
Frequent Trading Risk. The portfolio managers may actively and frequently trade investments in the Fund's portfolio to carry out its investment strategies. Frequent trading of investments increases the possibility that the Fund, as relevant,
will realize taxable capital gains (including short-term capital gains, which are generally taxable to shareholders at higher rates than long-term capital gains for U.S. federal income tax purposes), which could reduce the Fund's after-tax return.
Frequent trading can also mean higher brokerage and other transaction costs, which could reduce the Fund's return. The trading costs and tax effects associated with portfolio turnover may adversely affect the Fund’s performance.
Select Portfolio Risk. Because
the Fund may invest in a limited number of companies, the Fund as a whole is subject to greater risk of loss if any of its portfolio securities decline in price. In addition, the Fund’s holdings and weightings will diverge significantly from
its primary benchmark’s holdings and weightings and the Fund may therefore experience greater risk and volatility relative to the benchmark. Because the Fund may invest in more than one company concentrated in a similar industry, sector or
geographic region, the Fund may be even more concentrated than the number of companies it may hold would suggest.
Derivatives Risk – Swaps Risk. Swaps are derivatives, whereby in a typical swap transaction, two parties agree to exchange the returns earned on a specified underlying reference for a fixed return or the return from another underlying reference during
a specified period of time. Swaps may be difficult to value and may be illiquid. Swaps could result in Fund losses if the underlying asset or reference does not perform as anticipated. Swaps create significant investment leverage such that a
relatively small price movement in a swap may result in immediate and substantial losses to the Fund. The Fund may only close out a swap with its particular counterparty, and may only
| 9 | Columbia Thermostat FundSM |
transfer a position with the consent of that counterparty. Certain swaps,
such as short swap transactions and total return swaps, have the potential for unlimited losses, regardless of the size of the initial investment. Swaps can increase the Fund’s risk exposure to underlying references and their attendant risks,
such as credit risk, market risk, foreign currency risk and interest rate risk, while also exposing the Fund to correlation risk, counterparty risk, hedging risk, inflation risk, leverage risk, liquidity risk, pricing risk and volatility risk.
Highly Leveraged Transactions Risk. The loans or other debt instruments 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 other debt instruments that are part of highly leveraged transactions involve a greater risk (including default and bankruptcy) than other investments.
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.
Performance Information
The following bar chart and table show you how the Fund has
performed in the past, and can help you understand the risks of investing in the Fund. The bar chart shows how the Fund’s Class Z share performance has varied for each full calendar year shown. The table below the bar chart compares the
Fund’s returns for the periods shown with those of the S&P 500® Index, the Fund’s primary benchmark for equity securities, the
Barclays U.S. Aggregate Bond Index, the Fund’s primary benchmark for debt securities and a 50/50 Blended Benchmark. The S&P 500® Index
tracks the performance of 500 widely held, large-capitalization U.S. stocks. The Barclays U.S. Aggregate Bond Index is a market value-weighted index that tracks the daily price, coupon, pay-downs, and total return performance of fixed-rate, publicly
placed, dollar-denominated, and non-convertible investment grade debt issues with at least $250 million par amount outstanding and with at least one year to final maturity. The 50/50 Blended Benchmark was established by the Investment Manager
to show how the Fund’s performance compares to an equally weighted custom composite of the Fund’s primary equity and primary debt benchmarks, the S&P 500® Index and the Barclays U.S. Aggregate Bond Index, respectively. The percentage of the Fund’s assets allocated to underlying stock and bond
Portfolio Funds will vary, and accordingly the composition of the Fund’s portfolio will not always reflect the composition of the 50/50 Blended Benchmark.
The performance of one or more share classes shown in the Average Annual Total Returns table below includes the Fund’s Class Z share returns (adjusted to reflect the higher class-related operating expenses of such classes, where applicable) for periods prior to the
indicated inception date of such share classes. Except for differences in fees and expenses, all share classes of the Fund would have substantially similar annual returns because all share classes of the Fund invest in the same portfolio of
securities.
The after-tax returns shown in the Average Annual Total Returns table below are calculated using the highest historical individual U.S. federal marginal income tax rates and do not reflect the impact of state, local or foreign taxes. Your actual
after-tax returns will depend on your personal tax situation and may differ from those shown in the table. In addition, the after-tax returns shown in the table do not apply to shares held in tax-advantaged accounts such as 401(k) plans or
Individual Retirement Accounts (IRAs). The after-tax returns are shown only for Class Z shares and will vary for other share classes.
The Fund’s past performance (before and after taxes) is no
guarantee of how the Fund will perform in the future. Updated performance information can be obtained by calling toll-free 800.345.6611 or visiting columbiathreadneedle.com/us.
| Columbia Thermostat FundSM | 10 |
| Year
by Year Total Return (%) as of December 31 Each Year* |
Best
and Worst Quarterly Returns During the Period Shown in the Bar Chart | ||
|
Best | 2nd Quarter 2009 | 19.33% |
| Worst | 4th Quarter 2008 | -19.26% | |
| * | Year to Date return as of March 31, 2016: 1.84% |
Average Annual Total Returns After Applicable Sales
Charges (for periods ended December 31, 2015)
| Share
Class Inception Date |
1 Year | 5 Years | 10 Years | |
| Class Z | 09/25/2002 | |||
| returns before taxes | 0.33% | 6.66% | 6.02% | |
| returns after taxes on distributions | -1.14% | 5.33% | 4.68% | |
| returns after taxes on distributions and sale of Fund shares | 0.50% | 4.80% | 4.41% | |
| Class A returns before taxes | 03/03/2003 | -5.70% | 5.13% | 5.13% |
| Class C returns before taxes | 03/03/2003 | -1.65% | 5.59% | 4.96% |
| Class R4 returns before taxes | 11/08/2012 | 0.33% | 6.65% | 6.01% |
| Class R5 returns before taxes | 11/08/2012 | 0.33% | 6.67% | 6.02% |
| Class Y returns before taxes | 11/08/2012 | 0.32% | 6.69% | 6.04% |
| S&P 500® Index (reflects no deductions for fees, expenses or taxes) | 1.38% | 12.57% | 7.31% | |
| Barclays U.S. Aggregate Bond Index (reflects no deductions for fees, expenses or taxes) | 0.55% | 3.25% | 4.51% | |
| 50/50 Blended Benchmark (an equally weighted custom composite of the Fund's primary benchmarks for equity and debt securities, established by the Investment Manager; reflects no deductions for fees, expenses or taxes) | 1.21% | 8.02% | 6.22% |
Fund Management
Investment Manager: Columbia
Wanger Asset Management, LLC
| Portfolio Manager | Title | Role with Fund | Service with the Fund Since | |||
| David L. Frank, CFA | Portfolio Manager and Analyst | Co-manager since 2016 | 2002 | |||
| Christopher J. Olson, CFA | Portfolio Manager and Analyst | Co-manager since 2014 | 2002 |
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 | |||
| columbiathreadneedle.com/us | 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:
| 11 | Columbia Thermostat FundSM |
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 R4 & Y | 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
The Fund normally distributes 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. The use of a
fund-of-funds structure could affect the timing, amount and character of distributions to you and therefore may increase the amount of taxes payable by you. 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 the Investment Manager, 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.
These potential conflicts of interest may be heightened with respect to broker-dealers owned by Ameriprise Financial and/or its affiliates. Ask your financial advisor or visit your financial intermediary's website for more information.
| Columbia Thermostat FundSM | 12 |
Columbia Acorn
Family of Funds
Columbia Threadneedle Investments
is the global brand name of the Columbia and Threadneedle group of companies.
All rights reserved. Columbia Management Investment Distributors,
Inc., 225 Franklin Street, Boston, MA 02110-2804
© 2016 Columbia Management Investment Advisers, LLC.
| columbiathreadneedle.com/us | SUM235_12_F01_(05/16) |