AMG Funds IV

	Summary Prospectus	February 1, 2021
	AMG Managers Pictet International Fund

Class N: APINX

Class I: APCTX

Class Z: APCZX

Before you invest, you may want to review the Fund’s prospectus and statement of additional information, which contain more information about the Fund and its risks. You can find the Fund’s prospectus, statement of additional information, reports to shareholders and other information about the Fund online at
https://www.amgfunds.com/resources/order_literature.html. You can also get this information at no cost by calling 1-800-548-4539 or by sending an e-mail request to shareholderservices@amg.com. The current prospectus and statement of additional information, dated February 1, 2021, as revised or supplemented from time to time, are incorporated by reference into this summary prospectus.

Investment Objective

The Fund seeks to provide capital appreciation.

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 Fee¹	0.67%	0.67%	0.67%
Distribution and Service (12b-1) Fees	0.25%	None	None
Other Expenses¹	0.43%	0.38%	0.28%
Total Annual Fund Operating Expenses	1.35%	1.05%	0.95%
Fee Waiver and Expense Reimbursements²	(0.06)%	(0.06)%	(0.06)%
Total Annual Fund Operating Expenses After Fee Waiver and Expense Reimbursements²	1.29%	0.99%	0.89%

¹	Expense information has been restated to reflect current fees.

AMG Funds LLC (the “Investment Manager”) has contractually agreed, through at least March 1, 2022, 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 0.89% 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 IV 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 March 1, 2022. 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	$131	$421	$733	$1,618
Class I	$101	$328	$573	$1,277
Class Z	$ 91	$296	$519	$1,160

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 43% of the average value of its portfolio.

Principal Investment Strategies

Under normal circumstances, the Fund invests primarily in equity securities, principally common stocks, of non-U.S. companies. The Fund emphasizes companies whose principal activities are located in countries represented by the Morgan Stanley Capital International (“MSCI”) Europe, Australasia and Far East (“EAFE”) Index. Companies generally may be considered to have principal activities in a country if they are organized or headquartered in such country or their stock principally trades in markets located in such country. The Fund may invest to a more limited extent in other developed countries such as the United States or Canada. The Fund may also invest in securities of companies that are listed, or whose principal business activities are located in emerging market countries. The Fund may invest in companies of all sizes, including small- and mid-cap companies, and may invest in initial public offerings (“IPOs”).

SUM090-0221

AMG Managers Pictet International Fund SUMMARY PROSPECTUS

Pictet Asset Management Limited, the subadviser to the Fund (“PAM” or the “Subadviser”), seeks to build a portfolio of companies that trade below their underlying (“intrinsic”) value at the time of purchase. To identify such stocks, the Subadviser’s investment process utilizes bottom-up fundamental analysis that focuses on future growth in cash generation and cash returns on the capital employed in the business. Because the portfolio is focused on both growth and valuation, the portfolio has Growth at a Reasonable Price (“GARP”) characteristics. The Subadviser calculates an intrinsic value for candidate companies using complimentary long-term forecasting techniques, and to establish an investment thesis with clearly identified investment drivers. The Subadviser builds and maintains a portfolio that seeks to combine high conviction ideas, while diversifying their underlying investment drivers. The Fund’s regional and country allocations, industry sector allocations and market capitalization ranges are a result of the bottom-up selection process, and may result in the Fund holding a substantial amount of assets in a single country or geographic region. The Fund may purchase or sell foreign currencies to hedge against changes in the value of the U.S. dollar or to help protect the value of foreign securities that it purchases. The Subadviser adheres to a structured sell discipline by monitoring performance, target price levels, risk and the overall investment case of the stocks in the portfolio.

As of the date of this Prospectus, countries represented by the MSCI EAFE Index include: Australia, Austria, Belgium, Denmark, Finland, France, Germany, Hong Kong, Ireland, Israel, Italy, Japan, the Netherlands, New Zealand, Norway, Portugal, Singapore, Spain, Sweden, Switzerland and the United Kingdom.

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.

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 in 2020, or in response to events that affect particular industries or companies.

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.

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

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

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.

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.

Focused Investment Risk—to the extent the Fund invests a substantial portion of its assets in a relatively small number of securities or a particular market, industry, group of industries, country, region, group of countries, asset class or sector, it generally will be subject to greater risk than a fund that invests in a more diverse investment portfolio. In addition, the value of the Fund would be more susceptible to any single economic, market, political or regulatory occurrence affecting, for example, that particular market, industry, region or sector.

GARP Style Risk— GARP investing involves buying stocks that have a reasonable price/earnings ratio in relationship to a company’s earnings growth rate. The Fund’s performance may be adversely affected when stocks preferred by a GARP investing strategy underperform or are not favored by investors in prevailing market and economic conditions.

Geographic Focus Risk—to the extent the Fund focuses its investments in a particular country, group of countries or geographic region, the Fund is particularly susceptible to economic, political, regulatory or other events or conditions affecting such countries or region, and the Fund’s NAV may be more volatile than the NAV of a more geographically diversified fund and may result in losses.

Japan. The Fund is highly susceptible to the social, political, economic, regulatory and other conditions or events that may affect Japan’s economy. The Japanese economy is heavily dependent upon international trade, and, therefore, is particularly exposed to the risks of currency fluctuation, foreign trade policy and regional and global economic disruption, including

AMG Funds

AMG Managers Pictet International Fund SUMMARY PROSPECTUS

the risk of increased tariffs, embargoes, and other trade limitations or factors. Japanese government policy has been characterized by economic regulation, intervention, protectionism and large government deficits. The Japanese economy is also challenged by an unstable financial services sector, highly leveraged corporate balance sheets and extensive cross-ownership among major corporations. Structural social and labor market changes, including an aging workforce, population decline and traditional aversion to labor mobility may adversely affect Japan’s economic competitiveness and growth potential. The potential for natural disasters, such as earthquakes, volcanic eruptions, typhoons and tsunamis, could also have significant negative effects on Japan’s economy.

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.

Hedging Risk—there is no guarantee that hedging strategies will be successful. For example, changes in the value of a hedging transaction may not completely offset changes in the value of the assets and liabilities being hedged. Hedging transactions involve costs and may result in losses.

IPO Risk—the prices of stocks purchased in initial public offerings (“IPOs”) can be very volatile and tend to fluctuate more widely than stocks of companies that have been publicly traded for a longer period of time. The effect of IPOs on the Fund’s performance depends on a variety of factors.

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.

Sector Risk—issuers and companies that are in similar industry sectors may be similarly affected by particular economic or market events; to the extent the Fund has substantial holdings within a particular sector, the risks associated with that sector increase. Stocks in the industrials sector may comprise a significant portion of the Fund's portfolio. The industrials sector may be affected by general economic trends, including employment, economic growth and interest rates, changes in consumer confidence and spending, government regulation, commodity prices and competitive pressures.

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 a broad-based securities market index. As always, past performance of the Fund (before and after taxes) is not an indication of how the Fund will perform in the future. To obtain updated performance information please visit www.amgfunds.com or call 800.548.4539.

Calendar Year Total Returns as of 12/31/20 (Class N)

Best Quarter: 22.70% (4th Quarter 2020)
Worst Quarter: -28.56% (1st Quarter 2020)

Average Annual Total Returns as of 12/31/20
AMG Managers Pictet International Fund	1 Year	5 Years	Since Inception
Class N Return Before Taxes	5.88%	6.39%	3.86% ¹
Class N Return After Taxes on Distributions	5.88%	5.36%	3.05% ¹
Class N Return After Taxes on Distributions and Sale of Fund Shares	3.48%	4.86%	2.90% ¹
Class I Return Before Taxes	6.15%	6.68%	4.16% ¹
Class Z Return Before Taxes	6.27%	—	2.80% ²
MSCI EAFE Index (reflects no deduction for fees, expenses, or taxes)	7.82%	7.45%	4.64% ¹
MSCI EAFE Index (reflects no deduction for fees, expenses, or taxes)	7.82%	7.45%	5.28% ²

¹	Class N, Class I and Index performance shown reflects performance since the inception date of the Fund's Class N and Class I shares on April 14, 2014.
²	Class Z and Index performance shown reflects performance since the inception date of the Fund's Class Z shares on September 29, 2017.

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

Pictet Asset Management Limited

AMG Funds

AMG Managers Pictet International Fund SUMMARY PROSPECTUS

Portfolio Managers

Fabio Paolini, CFA
Co-Head of EAFE Equities at PAM;
Portfolio Manager of the Fund since 04/14.

Benjamin Beneche, CFA
Co-Head of EAFE Equities at PAM;
Portfolio Manager of the Fund since 04/14.

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

^*Individual retirement accounts may only invest in Class Z shares by purchasing shares directly from the Fund.

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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