Investment Objective

The AMG GW&K Global Allocation Fund’s (the “Fund” or “GW&K Global Allocation Fund”) investment objective is to achieve long-term capital appreciation with moderate current income.

Fees and Expenses of the Fund

The table below describes the fees and expenses that you may pay if you buy, hold and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.

Annual Fund Operating Expenses
(expenses that you pay each year as a percentage of the value of your investment)

	Class N	Class I	Class Z
Management Fee	0.60%	0.60%	0.60%
Distribution and Service (12b-1) Fees	0.25%	None	None
Other Expenses	0.25%	0.35%	0.25%
Total Annual Fund Operating Expenses	1.10%	0.95%	0.85%
Fee Waiver and Expense Reimbursements1	(0.04)%	(0.04)%	(0.04)%
Total Annual Fund Operating Expenses After Fee Waiver and Expense Reimbursements1	1.06%	0.91%	0.81%

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AMG Funds LLC (the “Investment Manager”) has contractually agreed, through at least May 1, 2023, to waive management fees and/or pay or reimburse the Fund’s expenses in order to limit Total Annual Fund Operating Expenses After Fee Waiver and Expense Reimbursements (exclusive of taxes, interest (including interest incurred in connection with bank and custody overdrafts and in connection with securities sold short), shareholder servicing fees, distribution and service (12b-1) fees, brokerage commissions and other transaction costs, dividends payable with respect to securities sold short, acquired fund fees and expenses, and extraordinary expenses) of the Fund to the annual rate of 0.81% of the Fund’s average daily net assets (this annual rate or such other annual rate that may be in effect from time to time, the “Expense Cap”), subject to later reimbursement by the Fund in certain circumstances. In general, for a period of up to 36 months after the date any amounts are paid, waived or reimbursed by the Investment Manager, the Investment Manager may recover such amounts from the Fund, provided that such repayment would not cause the Fund’s Total Annual Fund Operating Expenses After Fee Waiver and Expense Reimbursements (exclusive of the items noted in the parenthetical above) to exceed either (i) the Expense Cap in effect at the time such amounts were paid, waived or reimbursed, or (ii) the Expense Cap in effect at the time of such repayment by the Fund. The contractual expense limitation may only be terminated in the event the Investment Manager or a successor ceases to be the investment manager of the Fund or a successor fund, by mutual agreement between the Investment Manager and the AMG Funds II Board of Trustees or in the event of the Fund’s liquidation unless the Fund is reorganized or is a party to a merger

in which the surviving entity is successor to the accounting and performance information of the Fund.

Expense Example

This Example will help you compare the cost of investing in the Fund to the cost of investing in other mutual funds. The Example makes certain assumptions. It assumes that you invest $10,000 as an initial investment in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. It also assumes that your investment has a 5% total return each year and the Fund’s operating expenses remain the same. The Example includes the Fund’s contractual expense limitation through May 1, 2023. Although your actual costs may be higher or lower, based on the above assumptions, your costs would be:

	1 Year	3 Years	5 Years	10 Years
Class N	$108	$346	$602	$1,337
Class I	$ 93	$299	$522	$1,163
Class Z	$ 83	$267	$467	$1,045

Portfolio Turnover

The Fund pays 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 36% of the average value of its portfolio.

Principal Investment Strategies

Under normal circumstances, the Fund will generally invest 55-70% of its net assets in equity securities and invest the remainder of its assets in fixed income securities, cash and cash equivalents. GW&K Investment Management, LLC (“GW&K” or the “Subadviser”) takes an active approach to managing global equity and fixed income investments and seeks to manage risk through diversification, in-depth research and a focus on quality.

The equity portion of the Fund is invested primarily in a diversified global portfolio of equity securities, including common and preferred stocks, convertible securities, exchange-traded funds (“ETFs”), American Depositary Receipts (“ADRs”), Global Depositary Receipts (“GDRs”) and other depositary receipts of non-U.S. listed companies. The equity portion of the Fund may be invested across regions, including in developed and emerging

markets, market capitalization ranges, investment styles and sectors. The Fund may invest in companies of any size. With respect to equities, GW&K believes that earnings growth combined with high returns on capital can lead to attractive returns over the long term. GW&K’s fundamental research process analyzes a company’s market positioning, growth profile, financial strength, management team strength and valuation. GW&K seeks to construct a focused portfolio of equity securities issued by companies that GW&K believes are growing and competitively advantaged and that generate sustainable earnings growth and return on capital.

Under normal circumstances, the Fund will generally invest 30-45% of its net assets in fixed income securities (including cash and cash equivalents). The fixed income portion of the Fund may invest in a wide range of domestic and foreign fixed income securities, including securities issued by any of the following: public and private companies; the U.S. government and its agencies, such as the Federal Home Loan Bank; state and local governments issuing taxable municipal securities; and foreign governments, their agencies and instrumentalities, including issuers in emerging markets. The Fund may also invest in asset-backed and mortgage-backed debt securities, including agency mortgage-backed securities. The fixed income portion of the Fund may include non-U.S. dollar denominated fixed income securities as well fixed income securities payable in U.S. dollars that are issued in the United States by foreign banks and corporations. With respect to fixed income, GW&K actively manages the portfolio across multiple fixed income sectors in order to take advantage of what GW&K believes are relative value opportunities in changing market conditions. GW&K seeks quality in the fixed income sectors in which the Fund invests, including with respect to high yield investments. GW&K’s investment process involves fundamental credit research and GW&K’s analysis of how the Fund’s potential investments are affected by material environmental, social and governance (“ESG”) factors. In selecting potential fixed-income investments for the Fund, GW&K uses top-down research that focuses on managing duration, sector allocation, credit quality and yield curve, as well as bottom-up research that focuses on fundamental analysis, valuation analysis, technical analysis, and ESG factor analysis.

Based on GW&K’s investment outlook, the Fund may invest up to 30% of its net assets in below-investment grade securities (commonly known as “junk bonds” or “high yield securities”) that GW&K believes do not involve undue risk to income or principal. Below investment grade securities are rated below Baa3 by Moody’s Investors Service, Inc. (“Moody’s”) or below BBB- by S&P Global Ratings (“S&P”) or similarly rated by another nationally recognized statistical rating organization, or unrated but determined by GW&K to be of comparable credit quality. While the Fund may invest in below-investment grade securities of any credit quality, the Fund generally seeks to invest in securities with higher credit ratings within the below-investment grade category. In cases where the credit ratings agencies have assigned different credit ratings to the same security, the security will be considered to have the higher credit rating. The Fund may continue to hold securities that are downgraded in credit rating subsequent to their purchase if

GW&K believes it would be advantageous to do so. Incorporating fundamental credit and market analysis, GW&K typically invests the Fund’s assets in bonds with 1- to 30- year maturities.

Under normal circumstances, the Fund will invest at least 35% of its net assets in investments economically tied to countries other than the U.S., and the Fund will hold investments economically tied to a minimum of three countries other than the U.S. The Fund considers an investment to be economically tied to a country other than the U.S. if it provides investment exposure to a non-U.S. issuer. If, in the view of GW&K, market conditions are not favorable, the Fund may invest less than 35% of its net assets in investments economically tied to countries other than the U.S. The Fund considers a company to be non-U.S. issuer if (i) it is organized outside the U.S. or maintains a principal place of business outside the U.S., (ii) its securities are traded principally outside the U.S., or (iii) during its most recent fiscal year, it derived at least 50% of its revenues or profits from goods produced or sold, investments made, or services performed outside the U.S. or it has at least 50% of its assets outside the U.S. To gain exposure to foreign issuers, the Fund may invest in ETFs.

GW&K has significant flexibility to adjust the Fund’s asset allocation. Under normal circumstances, it is not expected that the Fund will be above or below its anticipated normal allocation range of 55-70% in equities and 30-45% in fixed income securities by more than 10%. The Fund may invest more than 70% of its net assets in equities if GW&K considers conditions in the stock market to be more favorable than those in the bond market. In addition, the Fund may invest more than 45% of its net assets in fixed income securities and cash or cash equivalents, or other securities or instruments that GW&K considers less risky, with less than 55% of the Fund’s net assets invested in equities if GW&K considers conditions in the bond market to be more favorable than those in the stock market.

Principal Risks

There is the risk that you may lose money on your investment. All investments carry a certain amount of risk, and the Fund cannot guarantee that it will achieve its investment objective. An investment in the Fund is not a deposit or obligation of any bank, is not endorsed or guaranteed by any bank, and is not insured by the Federal Deposit Insurance Corporation (“FDIC”) or any other government agency.

Below are some of the risks of investing in the Fund. The risks are presented in an order intended to facilitate readability and their order does not imply that the realization of one risk is more likely to occur than another risk or likely to have a greater adverse impact than another risk. The significance of any specific risk to an investment in the Fund will vary over time, depending on the composition of the Fund’s portfolio, market conditions, and other factors. You should read all of the risk information presented below carefully, because any one or more of these risks may result in losses to the Fund.

Asset Allocation Risk—the Fund’s investments may not be allocated in the best performing asset classes.

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Market Risk—market prices of investments held by the Fund may fall rapidly or unpredictably due to a variety of factors, including economic, political, or market conditions, or other factors including terrorism, war, natural disasters and the spread of infectious illness or other public health issues, including epidemics or pandemics such as the COVID-19 outbreak, or in response to events that affect particular industries or companies.

Emerging Markets Risk—investments in emerging markets are subject to the general risks of foreign investments, as well as additional risks which can result in greater price volatility. Such additional risks include the risk that markets in emerging market countries are typically less developed and less liquid than markets in developed countries and such markets are subjected to increased economic, political, or regulatory uncertainties.

Foreign Investment Risk—investments in foreign issuers involve additional risks (such as risks arising from less frequent trading, changes in political or social conditions, and less publicly available information about non-U.S. issuers) that differ from those associated with investments in U.S. issuers and may result in greater price volatility.

Debt Securities Risk—the value of a debt security changes in response to various factors, including, for example, market-related factors, such as changes in interest rates or changes in the actual or perceived ability of an issuer to meet its obligations. Investments in debt securities are subject to, among other risks, credit risk, interest rate risk, extension risk, prepayment risk and liquidity risk.

Asset-Backed and Mortgage-Backed Securities Risk— investments in asset-backed and mortgage-backed securities involve risk of severe credit downgrades, loss due to prepayments that occur earlier or later than expected, illiquidity and default.

Credit Risk—the issuer of bonds or other debt securities may be unable or unwilling, or may be perceived as unable or unwilling, to make timely interest or principal payments or otherwise honor its obligations.

Currency Risk—fluctuations in exchange rates may affect the total loss or gain on a non-U.S. dollar investment when converted back to U.S. dollars and exposure to non-U.S. currencies may subject the Fund to the risk that those currencies will decline in value relative to the U.S. dollar.

ESG Investing Risk—the Subadviser incorporates ESG criteria into its investment process, which may result in the selection or exclusion of securities of certain issuers for reasons other than financial performance, and carries the risk that the Fund’s investment returns may underperform funds that do not utilize an ESG investment strategy. The application of this strategy may affect the Fund’s investment exposure to certain companies, sectors, regions, countries or types of investments, which could negatively impact the Fund’s performance depending on whether such investments are in or out of favor. Applying ESG criteria to investment decisions is qualitative and subjective by nature, and there is no guarantee that the criteria utilized by the Subadviser or any judgment exercised by the Subadviser will reflect the beliefs or values of any particular investor. ESG standards differ

by region and industry, and a company’s ESG practices or the Subadviser’s assessment of a company’s ESG practices may change over time.

Extension Risk—during periods of rising interest rates, a debtor may pay back a bond or other fixed income security slower than expected or required, and the value of such security may fall.

Growth Stock Risk—the prices of equity securities of companies that are expected to experience relatively rapid earnings growth, or “growth stocks,” may be more sensitive to market movements because the prices tend to reflect future investor expectations rather than just current profits.

High Yield Risk—below investment grade debt securities and unrated securities of similar credit quality (commonly known as “junk bonds” or “high yield securities”) may be subject to greater levels of interest rate, credit, liquidity, and market risk than higher-rated securities. These securities are considered predominately speculative with respect to the issuer’s continuing ability to make principal and interest payments.

Inflation/Deflation Risk—inflation risk is the risk that the value of assets or income from investments will be worth less in the future. Inflation rates may change frequently and drastically as a result of various factors and the Fund’s investments may not keep pace with inflation, which may result in losses to Fund investors or adversely affect the real value of shareholders’ investments in the Fund. Recently, there have been signs of inflationary price movements. As such, fixed income securities markets may experience heightened levels of interest rate volatility and liquidity risk. Deflation risk is the risk that the prices throughout the economy decline over time – the opposite of inflation. Deflation may have an adverse effect on the creditworthiness of issuers and may make issuer default more likely, which may result in a decline in the value of the Fund’s portfolio.

Interest Rate Risk—fixed coupon payments (cash flows) of bonds and debt securities may become less competitive with the market in periods of rising interest rates and cause bond prices to decline. During periods of increasing interest rates, the Fund may experience high levels of volatility and shareholder redemptions, and may have to sell securities at times when it would otherwise not do so, and at unfavorable prices, which could reduce the returns of the Fund.

Large-Capitalization Stock Risk—the stocks of large-capitalization companies are generally more mature and may not be able to reach the same levels of growth as the stocks of small- or mid-capitalization companies.

Liquidity Risk—the Fund may not be able to dispose of particular investments, such as illiquid securities, readily at favorable times or prices or the Fund may have to sell them at a loss.

Management Risk—because the Fund is an actively managed investment portfolio, security selection or focus on securities in a particular style, market sector or group of companies may cause the Fund to incur losses or underperform relative to its benchmarks or other funds with a similar investment objective. There

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can be no guarantee that the Subadviser’s investment techniques and risk analysis will produce the desired result.

Mid-Capitalization Stock Risk—the stocks of mid-capitalization companies often have greater price volatility, lower trading volume, and less liquidity than the stocks of larger, more established companies.

Municipal Market Risk—factors unique to the municipal bond market may negatively affect the value of municipal bonds.

Political Risk—changes in the general political and social environment of a country can have substantial effects on the value of investments exposed to that country.

Prepayment Risk—a debtor may exercise its right to pay back a bond or other debt security earlier than expected or required during periods of decreasing interest rates.

Reinvestment Risk—the Fund may have difficulty reinvesting payments from debtors and may receive lower rates than from its original investments.

Small-Capitalization Stock Risk—the stocks of small-capitalization companies often have greater price volatility, lower trading volume, and less liquidity than the stocks of larger, more established companies.

U.S. Government Securities Risk—obligations issued by some U.S. Government agencies, authorities, instrumentalities, or sponsored enterprises such as Government National Mortgage Association (“GNMA”) are backed by the full faith and credit of the U.S. Government, while obligations issued by others, such as Federal National Mortgage Association (“FNMA”), Federal Home Loan Mortgage Corporation (“FHLMC”), and Federal Home Loan Banks (“FHLBs”), are not backed by the full faith and credit of the U.S. Government and are backed solely by the entity’s own resources or by the ability of the entity to borrow from the U.S. Treasury. If one of these agencies defaults on a loan, there is no guarantee that the U.S. Government will provide financial support.

Value Stock Risk—value stocks may perform differently from the market as a whole and may be undervalued by the market for a long period of time.

Performance

The following performance information illustrates the risks of investing in the Fund by showing changes in the Fund’s performance from year to year and by showing how the Fund’s performance compares to that of two broad based securities market indices and to a composite index, which more accurately reflects the composition of the Fund's portfolio. As always, past performance of the Fund (before and after taxes) is not an indication of how the Fund will perform in the future.

As of April 17, 2020, GW&K was appointed as subadviser to the Fund and the Fund changed its name to “AMG GW&K Global Allocation Fund,” adopted its current investment strategies and began comparing its performance to the 60% MSCI ACWI Index/40% Bloomberg Global Aggregate Bond Index, MSCI ACWI Index and Bloomberg Global Aggregate Bond Index. The Fund’s performance information for periods prior to April 17,

2020 reflects the Fund’s investment strategy that was in effect at that time and would have been different had the Fund’s current investment strategy been in effect.

The performance information of the Fund’s Class N shares (formerly Investor Class shares, which were renamed Class N shares on October 1, 2016 (formerly Class A shares, which were renamed Investor Class shares on December 1, 2012)) in the bar chart, and for periods prior to December 1, 2012 in the table below, does not reflect the impact of any previously imposed front end or deferred sales charges (loads) that were in effect until December 1, 2012. Effective October 1, 2016, outstanding Service Class and Institutional Class shares of the Fund were renamed Class I and Class Z shares, respectively. To obtain updated performance information please visit www.amgfunds.com or call 800.548.4539.

Calendar Year Total Returns as of 12/31/21 (Class N)

Best Quarter: 15.13% (2nd Quarter 2020)
Worst Quarter: -15.26% (1st Quarter 2020)

Average Annual Total Returns as of 12/31/21
AMG GW&K Global Allocation Fund	1 Year	5 Years	10 Years	Since Inception1
Class N Return Before Taxes	2.44%	9.84%	9.20%	—
Class N Return After Taxes on Distributions	1.86%	8.48%	7.68%	—
Class N Return After Taxes on Distributions and Sale of Fund Shares	1.85%	7.42%	6.98%	—
Class I Return Before Taxes	2.60%	10.00%	—	9.18%
Class Z Return Before Taxes	2.73%	10.13%	9.48%	—
60% MSCI ACWI Index/40% Bloomberg Global Aggregate Bond Index (reflects no deduction for fees, expenses, or taxes)	8.79%	10.18%	7.97%	7.66%
MSCI ACWI Index (reflects no deduction for fees, expenses, or taxes)	18.54%	14.40%	11.85%	11.55%

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Average Annual Total Returns as of 12/31/21 (continued)
AMG GW&K Global Allocation Fund	1 Year	5 Years	10 Years	Since Inception1
Bloomberg Global Aggregate Bond Index (reflects no deduction for fees, expenses, or taxes)	-4.71%	3.36%	1.77%	1.44%

1	Class I and Index performance shown reflects performance since the inception date of the Fund's Class I shares on November 30, 2012.

After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns are not relevant to investors who hold their Fund shares through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts (“IRAs”). After-tax returns are shown for Class N shares only, and after-tax returns for Class I and Class Z shares will vary.

Portfolio Management

Investment Manager

AMG Funds LLC

Subadviser

GW&K Investment Management, LLC

Portfolio Managers
Asset Allocation Team
Daniel L. Miller, CFA
Partner and Director of Equities of GW&K;
Portfolio Manager of the Fund since April 2020.

William P. Sterling, PhD
Global Strategist of GW&K;
Portfolio Manager of the Fund since April 2020.

Equity Team
Aaron C. Clark, CFA
Principal and Portfolio Manager of GW&K;
Portfolio Manager of the Fund since April 2020.

Thomas A. Masi, CFA
Partner and Portfolio Manager of GW&K;
Portfolio Manager of the Fund since April 2020.

Fixed Income Team
Mary F. Kane, CFA
Partner and Portfolio Manager of GW&K;
Portfolio Manager of the Fund since April 2020.

Buying and Selling Fund Shares

Initial Investment Minimum

Class N

Regular Account: $2,000
Individual Retirement Account: $1,000

Class I

Regular Account: $100,000
Individual Retirement Account: $25,000

Class Z^*

Regular Account: $5,000,000
Individual Retirement Account: $50,000

Additional Investment Minimum

Class N and Class I (all accounts): $100
Class Z (all accounts): $1,000

TRANSACTION POLICIES

You may purchase or sell your shares of the Fund any day that the New York Stock Exchange is open for business, either through your registered investment professional or directly with the Fund. Shares may be purchased, sold or exchanged by mail at the address listed below, by phone at 800.548.4539, online at www.amgfunds.com, or by bank wire (if bank wire instructions are on file for your account).

AMG Funds
c/o BNY Mellon Investment Servicing (US) Inc.
P.O. Box 9769
Providence, RI 02940-9769

Tax Information

The Fund intends to make distributions that are taxable to you as ordinary income, qualified dividend income or capital gains, except when your investment is in an IRA, 401(k), or other tax-advantaged investment plan. By investing in the Fund through such a plan, you will not be subject to tax on distributions from the Fund so long as the amounts distributed remain in the plan, but you will generally be taxed upon withdrawal of monies from the plan.

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, AMG Distributors, Inc. (the “Distributor”) and the Subadviser, 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 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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