Summary Prospectus 2015 BMO Aggressive Allocation Fund

Class Y BDSYX     Class I BDSHX     Class R3 BDSRX     Class R6 BDSQX As of December 29, 2015

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 and other information about the Fund online at bmofunds.com/documents/asset-allocation. You can also get this information at no cost by calling 1-800-236-FUND (3863), by sending an email request to bmofundsus.services@bmo.com, or by asking your broker/dealer, investment professional, or financial institution. The Fund’s Prospectus and Statement of Additional Information, both dated December 29, 2015, are incorporated by reference into this Summary Prospectus.

Investment Objective:

To provide total investment return primarily from appreciation, secondarily from income.

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.

Shareholder Fees (fees paid directly from your investment)	Class Y	Class I	Class R3	Class R6
Maximum Sales Charge (Load) Imposed on Purchases	None	None	None	None
Redemption Fee	None	None	None	None
Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Management Fees	None	None	None	None
Distribution (12b-1) Fees	None	None	0.50%	None
Other Expenses	0.53%	0.28%	0.28%	0.13%
Acquired (underlying) Fund Fees and Expenses(1)	0.66%	0.66%	0.66%	0.66%
Total Annual Fund Operating Expenses	1.19%	0.94%	1.44%	0.79%
Fee Waiver and Expense Reimbursement(2)	(0.20)%	(0.20)%	(0.20)%	(0.20)%
Total Annual Fund Operating Expenses After Fee Waiver and Expense Reimbursement(2)	0.99%	0.74%	1.24%	0.59%

(1) Acquired Fund Fees and Expenses represent the pro rata expense indirectly incurred by the Fund as a result of its investment in other investment companies. Total Annual Fund Operating Expenses shown will not correlate to the Fund’s ratios of expenses to average net assets appearing in the Financial Highlights tables, which do not include Acquired Fund Fees and Expenses.

(2) BMO Asset Management Corp. (Adviser) has agreed to waive or reduce fees and reimburse expenses to the extent necessary to prevent class total annual operating expenses (excluding interest, taxes, brokerage commissions, other investment-related costs, and extraordinary expenses, such as litigation and other expenses not incurred in the ordinary course of the Fund’s business, and Acquired Fund Fees and Expenses) from exceeding 0.33% for Class Y, 0.08% for Class I, 0.58% for Class R3, and (0.07)% for Class R6 through December 31, 2016. This expense limitation agreement may not be terminated prior to December 31, 2016 without the consent of the Fund’s Board of Directors, unless terminated due to the termination of the investment advisory agreement.

Example

This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other funds. The example assumes that you invest $10,000 in the Fund for the time periods indicated, whether

you redeem all of your shares at the end of those periods or not. The example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses are as shown in the table and remain the same. The costs in the one-year example and for the first year of the three-, five-, and ten-year examples reflect the Adviser’s agreement to waive fees and reimburse expenses through December 31, 2016. Although your actual costs and returns may be higher or lower, based on these assumptions your costs would be:

		Class Y		Class I		Class R3		Class R6
1 Year	$	101	$	76	$	126	$	60
3 Years	$	358	$	280	$	436	$	232
5 Years	$	635	$	501	$	768	$	419
10 Years	$	1,425	$	1,136	$	1,707	$	959

Portfolio Turnover

The Fund incurs 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. During the most recent fiscal year, the Fund’s portfolio turnover rate was 44% of the average value of its portfolio.

Principal Investment Strategies

The Fund invests primarily in shares of other mutual funds, including other BMO Funds (underlying funds), according to an asset allocation strategy developed by the Adviser. The Fund normally targets an allocation of approximately 100% of its total assets in funds that invest principally in equity securities, and will invest at least 80% of its assets in funds that invest principally in common or preferred stocks. Under normal market conditions the Fund allocates its assets among the underlying funds based on asset allocation target ranges of 0-10% of its total assets in funds that invest principally in money market funds and 90-100% of its total assets in funds that invest principally in equity securities. Equity securities in which the underlying funds may invest may be of any market capitalization and include common stock, preferred stock, depositary receipts, rights and warrants, and exchange-traded funds. The Fund also may allocate assets to underlying funds that invest in cash, cash equivalents, convertible securities (fixed income securities convertible into shares of common or preferred stock), and other short-term fixed income instruments, including money market funds. While the Fund will invest primarily in underlying funds that invest in U.S. securities, some underlying funds may invest in foreign securities, including emerging markets.

www.bmofundsus.com

Summary Prospectus 2015

BMO Aggressive Allocation Fund

Class Y BDSYX     Class I BDSHX     Class R3 BDSRX     Class R6 BDSQX As of December 29, 2015

The Fund is one of the BMO Target Risk Funds. The target investment allocation for each of the Target Risk Funds, based on each Fund’s total assets, is set forth below.

BMO Fund	Equity	Fixed Income	Money Market Funds
Conservative Allocation	10% - 30%	70% - 100%	0% - 10%
Moderate Allocation	30% - 50%	50% - 70%	0% - 10%
Balanced Allocation	50% - 70%	30% - 50%	0% - 10%
Growth Allocation	70% - 90%	10% - 30%	0% - 10%
Aggressive Allocation	90% - 100%	0%	0% - 10%

The Adviser will continuously monitor the Fund and may make modifications to either the investment approach or the underlying fund allocations that the Adviser believes could benefit shareholders. The Adviser will also monitor the underlying funds on an ongoing basis and may increase or decrease the Fund’s investment in one or several underlying funds. The underlying fund selections are made based on several considerations, including the fund’s investment team expertise style or asset class exposures, portfolio characteristics, risk profile, and investment process.

The underlying funds invest their assets directly in equity, fixed income, derivatives, cash, and cash equivalents (including money market funds) in accordance with their own investment objectives and policies.

Although the Fund intends to invest primarily in a combination of underlying funds, the Fund may invest directly in equity and fixed income securities and money market securities.

Principal Risks

The Fund cannot assure that it will achieve its investment objective. An investment in the Fund is not a deposit of BMO Harris Bank N.A., or any of its affiliates, and is not insured or guaranteed by the FDIC or any other government agency.

This section describes the principal risks associated with the Fund’s principal investment strategies. The net asset value of the Fund will vary, and you could lose money by investing in the Fund. The likelihood of loss may be greater if you invest for a shorter period of time. Investors in the Fund should have a long-term perspective and be able to tolerate potentially sharp declines in value.

Affiliated Fund Risk. The Adviser’s authority to select and substitute underlying funds from a variety of affiliated and unaffiliated mutual funds may create a conflict of interest because the Adviser and its affiliated companies typically receive fees from the affiliated funds.

Asset Allocation Risk. Investments in the Fund are subject to risks related to the Adviser’s allocation choices. The selection of the underlying funds and the allocation of the Fund’s assets among the various

asset classes and market segments could cause the Fund to lose value or cause the Fund to underperform relevant benchmarks or other funds with similar investment objectives.

Cybersecurity Risk. With the increased use of technologies such as the Internet to conduct business, the Fund is susceptible to operational, information security, and related risks. Cyber incidents affecting the Fund or its service providers have the ability to cause disruptions and impact business operations, potentially resulting in financial losses, interference with the Fund’s ability to calculate its net asset value, impediments to trading, the inability of shareholders to transact business, violations of applicable privacy and other laws, regulatory fines, penalties, reputational damage, reimbursement or other compensation costs, or additional compliance costs.

Market Risk. Stock and bond markets rise and fall daily. As with any investment whose performance is tied to these markets, the value of your investment in the Fund will fluctuate, which means that you could lose money.

Underlying Fund Investment Risk. The Fund invests in underlying funds and incurs expenses related to the underlying funds. In addition, investors in the Fund will incur fees to pay for certain expenses related to the operations of the Fund. An investor holding the underlying funds directly and in the same proportions as the Fund would incur lower overall expenses, but would not receive the benefit of the portfolio management and other services provided by the Fund. The Fund’s risks are directly related to the risks of the underlying funds. It is important to understand the risks associated with investing in the underlying funds.

• Derivatives Risk. The performance of derivative instruments depends largely on the performance of an underlying reference instrument and the portfolio manager’s ability to predict correctly the direction of securities prices, interest rates, currency exchange rates, and/or other economic factors. Derivatives involve additional costs and can create economic leverage in an underlying fund’s portfolio which may result in significant volatility and cause the underlying fund to participate in losses (as well as gains) in an amount that exceeds the underlying fund’s initial investment. Other risks include liquidity due to possible lack of a secondary market, mispricing or improper valuation of the derivative instrument, and imperfect correlation between the value of the derivative and the underlying instrument so that the underlying fund may not realize the intended benefits. When used for hedging, the change in value of the derivative may also not correlate specifically with the currency, security or other risk being hedged. With over-the-counter derivatives, there is the risk that the other party to the transaction will fail to perform. Specific types of derivative securities also are subject to a number of additional risks, such as:

Forward Foreign Currency Exchange Contracts Risk. Forward foreign currency exchange contracts are subject to currency risks. A forward foreign currency exchange contract may also result in losses in the event of a default or bankruptcy of the counterparty. Forward foreign currency exchange

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Summary Prospectus 2015

BMO Aggressive Allocation Fund

Class Y BDSYX     Class I BDSHX     Class R3 BDSRX     Class R6 BDSQX As of December 29, 2015

contracts may limit potential gain from a positive change in the relationship between the U.S. dollar and foreign currencies.

Forward Contracts Risk. Forward contracts are not currently exchange-traded and therefore no clearinghouse or exchange stands ready to meet the obligations of the contracts. Thus, an underlying fund faces the risk that its counterparties may not perform their obligations. Non-deliverable forwards are considered swaps and may in the future be required to be centrally cleared and traded on public facilities.

Options and Futures Risk. Options and futures contracts may be more volatile than investments directly in the underlying securities, involve additional costs, and may involve a small initial investment relative to the risk assumed.

Swap Agreements Risk. A swap agreement may not be assigned without the consent of the counterparty and may result in losses in the event of a default or bankruptcy of the counterparty.

• Emerging Markets Risk. Investments in emerging markets can involve risks in addition to and greater than those generally associated with investing in more developed foreign markets, which may make emerging market securities more volatile and potentially less liquid than securities issued in more developed markets.

• Equity Risk. The prices of equity securities rise and fall daily. These price movements may result from factors affecting individual companies, industries, or the securities market as a whole. In addition, equity markets tend to move in cycles, which may cause stock prices to fall over short or extended periods of time.

• Foreign Securities Risk. Investing in foreign securities may involve additional risks, including currency-rate fluctuations, political and economic instability, differences in financial reporting standards, less-strict regulation of the securities markets, and possible imposition of foreign withholding taxes. Furthermore, a fund may incur higher costs and expenses when making foreign investments, which will affect the fund’s total return.

• Large-, Mid-, and Small-Cap Risk. Stocks of different market capitalizations tend to go in and out of favor based on market and economic conditions. Historically, small- and mid-cap stocks tend to be more volatile than large-cap stocks, and small-cap stocks have been riskier than large- and mid-cap stocks. During a period when stocks of a particular market capitalization fall behind other types of investments, an underlying fund’s large-, mid-, or small-cap holdings could reduce performance.

• Liquidity Risk. Liquidity risk refers to the possibility that a fund may not be able to sell or buy a security or close out an investment contract at a favorable price or time. Consequently, an underlying fund may have to accept a lower price to sell a security, sell other securities to raise cash, or give up an investment opportunity, any of which could have a negative effect on the fund’s performance.

• Sector Risk. Companies with similar characteristics, such as those within the same industry, may be grouped together in broad categories called sectors. To the extent an underlying fund invests its assets in a particular sector, the fund’s performance may be more susceptible to any economic, business or other developments that generally affect that sector.

• Style Risk. Different investment styles, such as growth or equity, tend to shift in and out of favor depending on market and investor sentiment. The Fund may underperform other funds that invest in underlying funds with similar asset classes but employ different investment styles.

Fund Performance

The Fund is the successor to the portfolio of a collective trust fund (Collective Fund) managed by the Adviser with objectives, policies and restrictions that were, in all material respects, equivalent to those of the Fund. On May 30, 2014, the Fund’s inception date, the assets of the Collective Fund were transferred to the Fund in exchange for Fund shares. The performance information shown for the Class I shares includes the performance of the Collective Fund for periods before the Fund commenced operations, not adjusted to reflect the Class I expenses. If the Class I expenses had been deducted, the returns would be lower than those shown below. The Collective Fund was not registered under the Investment Company Act of 1940 (1940 Act) and was not subject to certain investment restrictions and diversification requirements that are imposed by the 1940 Act and the Internal Revenue Code which, if applicable, might have adversely affected the performance of the Collective Fund.

The bar chart and table show the historical performance of the Collective Fund and the Fund and provide some indication of the risks of investing in the Fund. The bar chart shows how the Collective Fund’s and the Fund’s total returns before taxes have varied from year to year, while the table compares the Collective Fund’s and the Fund’s average annual total returns to the returns of a broad measure of market performance and an index of funds with similar investment objectives. Performance for the Fund’s Class Y, R3 and R6 shares will vary from the Class I shares based on the expenses of each class. Please keep in mind that past performance does not represent how the Fund will perform in the future both before and after taxes. Investors may obtain updated performance information for the Fund at www.bmofunds.com.

Class I—Annual Total Returns (calendar years 2005-2014)

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Summary Prospectus 2015

BMO Aggressive Allocation Fund

Class Y BDSYX     Class I BDSHX     Class R3 BDSRX     Class R6 BDSQX As of December 29, 2015

For the period January 1, 2015 through September 30, 2015, the total return for the Class I shares of the Fund was (6.02)%.

During the periods shown in the bar chart for the Fund:

	Quarter Ended		Returns
Best quarter		9/30/2009		17.74	%
Worst quarter		12/31/2008		(22.56	)%

Average Annual Total Returns through 12/31/14

	1 Year			5 Year			10 Year			Since Inception
Class I (Inception 7/31/94)
Return Before Taxes		7.71	%		12.31	%		6.40	%		8.50	%
Return After Taxes on Distributions		N.A.			N.A.			N.A.			N.A.
Return After Taxes on Distributions and Sale of Fund Shares		N.A.			N.A.			N.A.			N.A.
S&P 500 Index		13.69	%		15.45	%		7.67	%		9.72	%
Lipper Mixed-Asset Target Allocation Growth Funds Index		7.04	%		10.39	%		6.49	%		N.A.

After-tax returns are calculated using the highest historical individual marginal federal income tax rates and do not reflect the effect of any applicable state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns shown are not relevant to investors holding shares through tax-deferred programs, such as IRAs or 401(k) plans. After-tax returns are shown only for Class I, and after-tax returns for Class Y, Class R3, and Class R6 will vary.

The S&P 500 Index is a market capitalization-weighted index of 500 common stocks chosen for market size, liquidity, and industry group representation to represent U.S. equity performance.

The Lipper Mixed-Asset Target Allocation Growth Funds Index is an average of the 30 largest mutual funds included in this Lipper category.

Management of the Fund

Adviser. BMO Asset Management Corp.

Portfolio Managers. Alan W. Schwartz, Lowell Yura, and Jon Adams are co-portfolio managers of the Fund. Mr. Schwartz, Director of Asset Allocation Strategies and Senior Vice President of the Adviser, joined the Adviser in 1981 and has been a portfolio manager of the Fund since its inception in 2014. Mr. Yura, Head of Multi-Asset Solutions at the Adviser, joined the Adviser in 2014 and has been a portfolio manager of the Fund since December 2014. Mr. Adams, Senior Investment Strategist and Portfolio Manager of the Adviser, joined the Adviser in 2015 and has managed the Fund since August 2015.

Purchase and Sale of Fund Shares

Minimums. To open an account, your first investment must be at least $1,000 for Class Y shares and $1,000,000 for Class I shares. For Class Y, the minimum subsequent purchase amount is $50.

Eligible retirement plans generally may open an account and purchase Class R3 and Class R6 shares by contacting BMO Funds U.S. Services.

Sale of Fund Shares. Please contact your plan administrator or recordkeeper in order to sell (redeem) Class R3 or Class R6 shares from your retirement plan.

You may sell (redeem) your Class Y or Class I shares of the Fund on any day the New York Stock Exchange is open for business using one of the following methods, depending on the elections you made in your account application:

Phone. Call 1-800-236-FUND (3863).

Wire/Electronic Transfer. Upon written request sent to the address below under “Mail,” redemption proceeds can be directly deposited by Electronic Funds Transfer or wired to your previously designated domestic commercial bank.

Mail. Send a written request, indicating your name, the Fund name, your account number, and the number of shares or the dollar amount you want to redeem, to: BMO Funds U.S. Services, P.O. Box 55931, Boston, MA 02205-5931.

Systematic Withdrawal Program. If your account balance is at least $10,000, you may have predetermined amounts of at least $100 withdrawn from your account on a monthly or quarterly basis.

BMO Funds Website. Go to www.bmofunds.com.

Tax Information

The Fund intends to make distributions that may be taxed as ordinary income or long-term capital gains for federal income tax purposes.

Payments to Broker-Dealers and Other Financial Intermediaries

If you purchase shares of the Fund through a broker-dealer or other financial intermediary (such as a bank), the Fund and its related companies may pay the intermediary for the sale of shares and related services. These payments may create a conflict of interest by influencing the broker-dealer or other intermediary and your salesperson to recommend the Fund over another investment. Ask your salesperson or visit your financial intermediary’s website for more information.

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