As filed with the U.S. Securities and Exchange Commission on April 24, 2020

Securities Act File No. 333-162441

Investment Company Act File No. 811-22338

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM N-1A

REGISTRATION STATEMENT

UNDER

THE SECURITIES ACT OF 1933	[ X ]
Pre-Effective Amendment No.
Post-Effective Amendment No. 196	[ X ]
and/or

REGISTRATION STATEMENT

UNDER

THE INVESTMENT COMPANY ACT OF 1940	[ X ]
Amendment No. 197

LEGG MASON GLOBAL ASSET MANAGEMENT TRUST*

(Exact Name of Registrant as Specified in Charter)

100 International Drive

Baltimore, Maryland 21202

(Address of Principal Executive Offices) (Zip Code)

Registrant's telephone number, including area code: (410) 539-0000

Name and address of agent for service:	Copy to:
Robert I. Frenkel	Roger P. Joseph, Esq.
Legg Mason & Co., LLC	Morgan, Lewis & Bockius LLP
100 First Stamford Place	One Federal Street
Stamford, Connecticut 06902	Boston, Massachusetts 02110
Continuous
(Approximate Date of Proposed Offering)

It is proposed that this filing will become effective:

[	]	immediately upon filing pursuant to paragraph (b)
[X ]		on May 1, 2020 pursuant to paragraph (b)
[	]	60 days after filing pursuant to paragraph (a)(1)

Share class (Symbol): A (LFLAX), A2 (—), C (—), R (—), I (LFLIX), IS (LFLSX)

Beginning in January 2021, as permitted by regulations adopted by the Securities and Exchange Commission, the fund intends to no longer mail paper copies of the fund’s shareholder reports, unless you specifically request paper copies of the reports from the fund or from your Service Agent or financial intermediary (such as a broker-dealer or bank). Instead, the reports will be made available on a website, and you will be notified by mail each time a report is posted and provided with a website link to access the report.

If you already elected to receive shareholder reports electronically (“e-delivery”), you will not be affected by this change and you need not take any action. If you have not already elected e-delivery, you may elect to receive shareholder reports and other communications from the fund electronically by contacting your Service Agent or, if you are a direct shareholder with the fund, by calling 1-877-721-1926.

You may elect to receive all future reports in paper free of charge. If you invest through a Service Agent, you can contact your Service Agent to request that you continue to receive paper copies of your shareholder reports. That election will apply to all Legg Mason funds held in your account at that Service Agent. If you are a direct shareholder with the fund, you can call the fund at 1-877-721-1926, or write to the fund by regular mail at Legg Mason Funds, P.O. Box 9699, Providence, RI 02940-9699 or by express, certified or registered mail to Legg Mason Funds, 4400 Computer Drive, Westborough, MA 01581 to let the fund know you wish to continue receiving paper copies of your shareholder reports. That election will apply to all Legg Mason Funds held in your account held directly with the fund complex.

The Securities and Exchange Commission has not approved or disapproved these securities or determined whether this Prospectus is accurate or complete. Any statement to the contrary is a crime.

The accompanying 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 your family invest, or agree to invest in the future, at least $100,000 in funds distributed through Legg Mason Investor Services, LLC (“LMIS”), the fund’s distributor. More information about these and other discounts is available from your Service Agent, in the fund’s Prospectus on page 30 under the heading “Sales charges,” in the appendix titled “Appendix: Waivers and Discounts Available from Certain Service Agents” on page A-1 of the fund’s Prospectus and in the fund’s Statement of Additional Information (“SAI”) on page 96 under the heading “Sales Charge Waivers and Reductions for Class A and Class A2 Shares.” “Service Agents” include banks, brokers, dealers, insurance companies, investment advisers, financial consultants or advisers, mutual fund supermarkets and other financial intermediaries that have entered into an agreement with LMIS to sell shares of the fund.

If you purchase Class I shares or Class IS shares through a Service Agent acting solely as an agent on behalf of its customers, that Service Agent may charge you a commission. Such commissions, if any, are not charged by the fund and are not reflected in the fee table or expense example below.

This 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 assumes:

Although your actual costs may be higher or lower, based on these assumptions your costs would be:

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 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 356% of the average value of its portfolio.

Under normal market conditions, the fund seeks to meet its investment objective by primarily investing in U.S. and foreign fixed income securities, currencies and derivative instruments. The subadviser has broad discretion to invest in multiple types of fixed income securities including, but not limited to, sovereign debt, emerging markets debt, corporate debt, high yield debt, bank loans, supranational issues, Separate Trading of Registered Interest and Principal of Securities (“STRIPS”), inflation-linked securities and hybrid securities.

The fund may invest in derivative instruments such as foreign currency forwards, bond futures, interest rate futures, swaps (including interest rate, total return and inflation swaps), credit default swaps, credit default swap index products, instruments involved in currency risk management strategies, options, options on futures and structured credit products. The fund may use derivatives to enhance total return, as a means of providing additional exposure to certain types of investments, to hedge against fluctuations in securities prices, interest rates or currency exchange rates, to change the effective duration of its portfolio, as a cash flow management technique or as a substitute for the purchase or sale of securities or currencies.

The fund may invest without limit in securities that are rated or unrated, including “high yield” or “junk” bonds (that is, securities rated below the Baa/BBB categories or, if unrated, determined to be of comparable credit quality by the subadviser).

Under normal conditions, the dollar-weighted average effective duration of the fund’s portfolio is expected to range from 0 to 10 years. However, the fund may invest without limit in securities of any maturity or duration.

As a global fund, the fund can seek investment opportunities anywhere in the world, and under normal market conditions, the fund will invest in or have exposure to at least three countries, which may include the United States. The fund can invest without limit in securities denominated in foreign currencies or in U.S. dollar-denominated securities. The fund considers an investment to be tied economically to a country if the issuer: (i) has

a class of its securities whose principal securities market is in the country; (ii) is organized under the laws of, or has a principal office in, the country, (iii) derives 50% or more of its total revenue or profit from goods produced, sales made or services provided in the country, or (iv) maintains 50% or more of its assets in the country.

The fund may invest up to 25% of its assets in asset-backed and mortgage-backed securities, up to 25% of its assets in convertible securities, up to 10% of its assets in preferred equity securities of companies of any size located anywhere in the world, and up to 10% of its assets in common equity securities of companies of any size located anywhere in the world. In addition, no more than 5% of the fund shall be invested in any one non-sovereign issue at time of purchase.

The fund is classified as “non-diversified,” which means it may invest a larger percentage of its assets in a smaller number of issuers than a diversified fund.

Risk is inherent in all investing. The value of your investment in the fund, as well as the amount of return you receive on your investment, may fluctuate significantly. You may lose part or all of your investment in the fund or your investment may not perform as well as other similar investments. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or by any bank or government agency. The following is a summary description of certain risks of investing in the fund.

Market and interest rate risk. The market prices of the fund’s securities may go up or down, sometimes rapidly or unpredictably, due to general market conditions, such as real or perceived adverse economic or political conditions, tariffs and trade disruptions, inflation, changes in interest rates, lack of liquidity in the bond markets or adverse investor sentiment. If the market prices of the fund’s securities fall, the value of your investment will decline. The value of your investment will generally go down when interest rates rise. A rise in rates tends to have a greater impact on the prices of longer term or duration securities. A general rise in interest rates may cause investors to move out of fixed income securities on a large scale, which could adversely affect the price and liquidity of fixed income securities and could also result in increased redemptions from the fund.

The maturity of a security may be significantly longer than its duration. A security’s maturity and other features may be more relevant than its duration in determining the security’s sensitivity to other factors affecting the issuer or markets generally such as changes in credit quality or in the yield premium that the market may establish for certain types of securities.

Market events risk. The market values of securities or other assets will fluctuate, sometimes sharply and unpredictably, due to changes in general market conditions, overall economic trends or events, governmental actions or intervention, actions taken by the U.S. Federal Reserve or foreign central banks, market disruptions caused by trade disputes or other factors, political developments, investor sentiment, the global and domestic effects of a pandemic, and other factors that may or may not be related to the issuer of the security or other asset. Economies and financial markets throughout the world are increasingly interconnected. Economic, financial or political events, trading and tariff arrangements, public health events, terrorism, natural disasters and other circumstances in one country or region could have profound impacts on global economies or markets. As a result, whether or not the fund invests in securities of issuers located in or with significant exposure to the countries directly affected, the value and liquidity of the fund’s investments may be negatively affected.

The rapid and global spread of a highly contagious novel coronavirus respiratory disease, designated COVID-19, first detected in China in December 2019, has resulted in extreme volatility in the financial markets and severe losses; reduced liquidity of many instruments; restrictions on international and, in some cases, local travel; significant disruptions to business operations (including business closures); strained healthcare systems; disruptions to supply chains, consumer demand and employee availability; and widespread uncertainty regarding the duration and long-term effects of this pandemic. Some sectors of the economy and individual issuers have experienced particularly large losses. In addition, the COVID-19 pandemic may result in a sustained economic downturn or a global recession, domestic and foreign political and social instability, damage to diplomatic and international trade relations and increased volatility and/or decreased liquidity in the securities markets. The ultimate economic fallout from the pandemic, and the long-term impact on economies, markets, industries and individual issuers, are not known. The U.S. government and the Federal Reserve, as well as certain foreign governments and central banks, are taking extraordinary actions to support local and global economies and the financial markets in response to the COVID-19 pandemic, including by pushing interest rates to very low levels. This and other government intervention into the economy and financial markets to address the COVID-19 pandemic may not work as intended, particularly if the efforts are perceived by investors as being unlikely to achieve the desired results. The COVID-19 pandemic could adversely affect the value and liquidity of the fund’s investments, impair the fund’s ability to satisfy redemption requests, and negatively impact the fund’s performance. In addition, the outbreak of COVID-19, and measures taken to mitigate its effects, could result in disruptions to the services provided to the fund by its service providers.

LIBOR risk. The fund’s investments, payment obligations, and financing terms may be based on floating rates, such as the London Interbank Offered Rate, or “LIBOR,” which is the offered rate for short-term Eurodollar deposits between major international banks. Plans are underway to phase out the use of LIBOR by the end of 2021. There remains uncertainty regarding the nature of any replacement rate and the impact of the transition from LIBOR on the fund’s transactions and the financial markets generally. As such, the potential effect of a transition away from LIBOR on the fund or the fund’s investments cannot yet be determined.

products or services, loss of major customers, changes in management, corporate actions, negative perception in the marketplace, major litigation against the issuer or changes in government regulations affecting the issuer or the competitive environment. The fund may experience a substantial or complete loss on an individual security.

Non-diversification risk. The fund is classified as “non-diversified,” which means it may invest a larger percentage of its assets in a smaller number of issuers than a diversified fund. To the extent the fund invests its assets in a smaller number of issuers, the fund will be more susceptible to negative events affecting those issuers than a diversified fund.

Portfolio management risk. The value of your investment may decrease if the subadviser’s judgment about the quality, relative yield, value or market trends affecting a particular security, industry, sector or region, or about interest rates, is incorrect or does not produce the desired results, or if there are imperfections, errors or limitations in the models, tools and data used by the subadviser. In addition, the fund’s investment strategies or policies may change from time to time. Those changes may not lead to the results intended by the subadviser and could have an adverse effect on the value or performance of the fund.

Model risk. The subadviser’s investment models may not adequately take into account certain factors and may result in the fund having a lower return than if the fund were managed using another model or investment strategy. When a model or data used in managing the fund contains an error, or is incorrect or incomplete, any investment decision made in reliance on the model or data may not produce the desired results and the fund may realize losses.

Credit risk. If an issuer or guarantor of a security held by the fund or a counterparty to a financial contract with the fund defaults or its credit is downgraded, or is perceived to be less creditworthy, or if the value of the assets underlying a security declines, the value of your investment will typically decline. The fund could be delayed or hindered in its enforcement of rights against an issuer, guarantor or counterparty. Subordinated securities are more likely to suffer a credit loss than non-subordinated securities of the same issuer and will be disproportionately affected by a default, downgrade or perceived decline in creditworthiness.

Prepayment or call risk. Many issuers have a right to prepay their fixed income securities. Issuers may be more likely to prepay their securities if interest rates fall. If this happens, the fund will not benefit from the rise in the market price of the securities that normally accompanies a decline in interest rates, and will be forced to reinvest prepayment proceeds at a time when yields on securities available in the market are lower than the yield on prepaid securities. The fund may also lose any premium it paid to purchase the securities.

Extension risk. When interest rates rise, repayments of fixed income securities may occur more slowly than anticipated, extending the effective duration of these fixed income securities at below market interest rates and causing their market prices to decline more than they would have declined due to the rise in interest rates alone. This may cause the fund’s share price to be more volatile.

High yield (“junk”) bonds risk. High yield bonds are generally subject to greater credit risks than higher-grade bonds, including the risk of default on the payment of interest or principal. High yield bonds are considered speculative, typically have lower liquidity and are more difficult to value than higher grade bonds. High yield bonds tend to be volatile and more susceptible to adverse events, credit downgrades and negative sentiments and may be difficult to sell at a desired price, or at all, during periods of uncertainty or market turmoil.

Foreign investments and emerging markets risk. The fund’s investments in securities of foreign issuers or issuers with significant exposure to foreign markets involve additional risk as compared to investments in U.S. securities or issuers with predominantly domestic exposure, such as less liquid, less transparent, less regulated and more volatile markets. The value of the fund’s investments may decline because of factors affecting the particular issuer as well as foreign markets and issuers generally, such as unfavorable or unsuccessful government actions, reduction of government or central bank support, inadequate accounting standards, lack of information and political, economic, financial or social instability. To the extent the fund focuses its investments in a single country or only a few countries in a particular geographic region, economic, political, regulatory or other conditions affecting such country or region may have a greater impact on fund performance relative to a more geographically diversified fund.

The value of investments in securities denominated in foreign currencies increases or decreases as the rates of exchange between those currencies and the U.S. dollar change. Currency conversion costs and currency fluctuations could erase investment gains or add to investment losses. Currency exchange rates can be volatile, and are affected by factors such as general economic conditions, the actions of the U.S. and foreign governments or central banks, the imposition of currency controls and speculation. The fund may be unable or may choose not to hedge its foreign currency exposure.

Less developed markets are more likely to experience problems with the clearing and settling of trades and the holding of securities by local banks, agents and depositories. Settlement of trades in these markets can take longer than in other markets and the fund may not receive its proceeds from the sale of certain securities for an extended period (possibly several weeks or even longer).

Sovereign debt risk. Sovereign government and supranational debt involve many of the risks of foreign and emerging markets investments as well as the risk of debt moratorium, repudiation or renegotiation and the fund may be unable to enforce its rights against the issuers. Sovereign debt risk is increased for emerging market issuers.

Mortgage-backed and asset-backed securities risk. When market interest rates increase, the market values of mortgage-backed securities decline. At the same time, mortgage refinancings and prepayments slow, which lengthens the effective duration of these securities. As a result, the negative effect of the interest rate increase on the market value of mortgage-backed securities is usually more pronounced than it is for other types of fixed income securities, potentially increasing the volatility of the fund. Conversely, when market interest rates decline, while the value of mortgage-backed securities may increase, the rate of prepayment of the underlying mortgages also tends to increase, which shortens the effective duration of these securities. Mortgage-backed securities are also subject to the risk that underlying borrowers will be unable to meet their obligations and the value of property that secures the mortgage may decline in value and be insufficient, upon foreclosure, to repay the associated loan. Investments in asset-backed securities are subject to similar risks.

Convertible securities risk. Convertible securities are subject to both stock market risk associated with equity securities and the credit and interest rate risks associated with fixed income securities. Credit risk is the risk that the issuer or obligor will not make timely payments of principal or interest or that its credit may be downgraded or perceived to be less creditworthy. Interest rate risk is the risk that the value of a fixed income security will fall when interest rates rise. A rise in rates tends to have a greater impact on the prices of longer term or duration securities. A general rise in interest rates may cause investors to move out of fixed income securities on a large scale, which could adversely affect the price and liquidity of fixed income securities. As the market price of the equity security underlying a convertible security falls, the convertible security tends to trade on the basis of its yield and other fixed income characteristics. As the market price of the equity security underlying a convertible security rises, the convertible security tends to trade on the basis of its equity conversion features.

Zero coupon bond risk. Zero coupon securities pay no interest during the life of the obligation but trade at prices below their stated maturity value. Because zero coupon securities pay no interest until maturity, their prices may fluctuate more than other types of securities with the same maturity.

Derivatives risk. Using derivatives can increase fund losses and reduce opportunities for gains when market prices, interest rates, currencies, or the derivatives themselves behave in a way not anticipated by the fund. Using derivatives also can have a leveraging effect and increase fund volatility. Certain derivatives have the potential for unlimited loss, regardless of the size of the initial investment. Derivatives may not be available at the time or price desired, may be difficult to sell, unwind or value, and the counterparty may default on its obligations to the fund. Derivatives are generally subject to the risks applicable to the assets, rates, indices or other indicators underlying the derivative. The value of a derivative may fluctuate more than the underlying assets, rates, indices or other indicators to which it relates. Use of derivatives may have different tax consequences for the fund than an investment in the underlying security, and those differences may affect the amount, timing and character of income distributed to shareholders. The U.S. government and foreign governments are in the process of adopting and implementing regulations governing derivatives markets, including mandatory clearing of certain derivatives, margin and reporting requirements. The ultimate impact of the regulations remains unclear. Additional regulation of derivatives may make derivatives more costly, limit their availability or utility, otherwise adversely affect their performance or disrupt markets.

Credit default swap contracts involve heightened risks and may result in losses to the fund. Credit default swaps may be illiquid and difficult to value. When the fund sells credit protection via a credit default swap, credit risk increases since the fund has exposure to both the issuer whose credit is the subject of the swap and the counterparty to the swap.

Leverage risk. The value of your investment may be more volatile if the fund borrows or uses instruments, such as derivatives, that have a leveraging effect on the fund’s portfolio. Other risks described in the Prospectus also will be compounded because leverage generally magnifies the effect of a change in the value of an asset and creates a risk of loss of value on a larger pool of assets than the fund would otherwise have had. The fund may also have to sell assets at inopportune times to satisfy its obligations. The use of leverage is considered to be a speculative investment practice and may result in the loss of a substantial amount, and possibly all, of the fund’s assets. In addition, the fund’s portfolio will be leveraged if it exercises its right to delay payment on a redemption, and losses will result if the value of the fund’s assets declines between the time a redemption request is deemed to be received by the fund and the time the fund liquidates assets to meet redemption requests.

The subadviser expects that the implementation of the fund’s investment strategy, which may include a significant level of investment in derivatives, will have the effect of creating leverage in the fund in that the fund’s potential exposure may be greater than its net assets.

Segregated assets risk. In connection with certain transactions that may give rise to future payment obligations, including borrowings and many types of derivatives, the fund may maintain a segregated amount of cash or liquid securities to cover the position. Segregated securities generally cannot be sold while the position they are covering is outstanding, unless they are replaced with other securities of equal value. As a result, there is the possibility that segregation of a large percentage of the fund’s assets may, in some circumstances, limit the portfolio managers’ flexibility to pursue other investment opportunities that might arise. When the fund segregates assets, it is exposed to the risk of loss both in connection with the segregated assets and the transactions to which they relate.

Risks relating to inflation-indexed securities. The value of inflation-indexed fixed income securities generally fluctuates in response to changes in real interest rates, which are in turn tied to the relationship between nominal interest rates and the rate of inflation. If nominal interest rates increase at a faster rate than inflation, real interest rates might rise, leading to a decrease in value of inflation-indexed securities. The fund may also experience a loss on an inflation-indexed security if there is deflation. If inflation is lower than expected during the period the fund holds an inflation-indexed security, the fund may earn less on the security than on a conventional bond.

Portfolio turnover risk. Active and frequent trading may increase a shareholder’s tax liability and the fund’s transaction costs, which could detract from fund performance.

Illiquidity risk. Some assets held by the fund may be impossible or difficult to sell and some assets that the fund wants to invest in may be impossible or difficult to purchase, particularly during times of market turmoil or due to adverse changes in the conditions of a particular issuer. These illiquid assets may also be difficult to value. Markets may become illiquid when, for instance, there are few, if any, interested buyers or sellers or when dealers are unwilling or unable to make a market for certain securities. As a general matter, dealers recently have been less willing to make markets for fixed income securities. Recent federal banking regulations may also cause certain dealers to reduce their inventories of certain securities, which may further decrease the fund’s ability to buy or sell such securities. If the fund is forced to sell an illiquid asset to meet redemption requests or other cash needs, the fund may be forced to sell at a loss. The fund may not receive its proceeds from the sale of certain securities for an extended period (for example, several weeks or even longer). The liquidity of certain assets, particularly of privately-issued and non-investment grade mortgage-backed securities, asset-backed securities and collateralized debt obligations, may be difficult to ascertain and may change over time.

Valuation risk. The sales price the fund could receive for any particular portfolio investment may differ from the fund’s valuation of the investment, particularly for securities that trade in thin or volatile markets or that are valued using a fair value methodology. Investors who purchase or redeem fund shares on days when the fund is holding fair-valued securities may receive fewer or more shares or lower or higher redemption proceeds than they would have received if the fund had not fair-valued securities or had used a different valuation methodology. The fund’s ability to value its investments may be impacted by technological issues and/or errors by pricing services or other third party service providers. The valuation of the fund’s investments involves subjective judgment.

Redemption risk. The fund may experience heavy redemptions that could cause the fund to liquidate its assets at inopportune times or unfavorable prices or increase or accelerate taxable gains or transaction costs and may negatively affect the fund’s NAV, performance, or ability to satisfy redemptions in a timely manner, which could cause the value of your investment to decline.

Cybersecurity risk. Cybersecurity incidents, both intentional and unintentional, may allow an unauthorized party to gain access to fund assets, fund or customer data (including private shareholder information), or proprietary information, cause the fund, the manager, the subadviser and/or their service providers (including, but not limited to, fund accountants, custodians, sub-custodians, transfer agents and financial intermediaries) to suffer data breaches, data corruption or loss of operational functionality or prevent fund investors from purchasing, redeeming or exchanging shares or receiving distributions. The fund, the manager, and the subadviser have limited ability to prevent or mitigate cybersecurity incidents affecting third party service providers, and such third party service providers may have limited indemnification obligations to the fund or the manager. Cybersecurity incidents may result in financial losses to the fund and its shareholders, and substantial costs may be incurred in order to prevent any future cybersecurity incidents. Issuers of securities in which the fund invests are also subject to cybersecurity risks, and the value of these securities could decline if the issuers experience cybersecurity incidents.

These and other risks are discussed in more detail in the Prospectus or in the Statement of Additional Information.

The accompanying bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the fund’s performance from year to year for Class IS shares. The table shows the average annual total returns of each class of the fund that has been in operation for at least one full calendar year and also compares the fund’s performance with the average annual total returns of an index or other benchmark. Performance prior to May 31, 2016 in the bar chart and the table is that of the fund’s predecessor. Performance for classes other than those shown may vary from the performance shown to the extent the expenses for those classes differ. The fund makes updated performance information, including its current net asset value, available at www.leggmason.com/mutualfunds (select fund and share class), or by calling the fund at 1-877-721-1926.

The fund’s past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future.

Sales charges are not reflected in the accompanying bar chart, and if those charges were included, returns would be less than those shown.

This fund is the successor to an institutional account (the “Predecessor”). The performance prior to May 31, 2016, in the accompanying bar chart and table is that of the Predecessor. Immediately prior to the fund commencing operations, the Predecessor transferred its assets to the fund in exchange for the fund’s Class IS shares. The investment policies, objectives, guidelines and restrictions of the fund are in all material respects equivalent to those of the Predecessor. In addition, the Predecessor’s portfolio managers currently serve as portfolio managers of the fund. As a mutual fund registered under the Investment Company Act of 1940 (the “1940 Act”), the fund is subject to certain restrictions under the 1940 Act to which the Predecessor was not subject. As a regulated investment company under the Internal Revenue Code of 1986, as amended (the “Code”), the fund is subject to certain restrictions under the Code to which the Predecessor was not subject. Had the Predecessor been registered under the 1940 Act and been subject to the provisions of the 1940 Act, its investment performance could have been adversely affected. Similarly, had the Predecessor been subject to provisions of the Code applicable to regulated investment companies, its investment performance may have been adversely affected. The performance is shown net of an annual management fee of 0.80% and other expenses of 0.10% which reflects the expenses of the Predecessor.

The Predecessor did not have distribution policies. The Predecessor was an unregistered private fund, did not qualify as a regulated investment company for federal income tax purposes and did not pay dividends or distributions.

The after-tax returns are shown only for Class IS shares, 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, and the after-tax returns shown are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns for classes other than Class IS will vary from returns shown for Class IS.

Subadviser: Brandywine Global Investment Management, LLC (“Brandywine Global”)

On February 18, 2020, Franklin Resources, Inc. (“Franklin Resources”) and Legg Mason, Inc. (“Legg Mason”) announced that they have entered into a definitive agreement for Franklin Resources to acquire Legg Mason in an all-cash transaction. As part of this transaction, LMPFA and the subadviser(s), each currently a wholly owned subsidiary of Legg Mason, would become a wholly owned subsidiary of Franklin Resources. The transaction is subject to approval by Legg Mason’s shareholders and customary closing conditions, including receipt of applicable regulatory approvals. Subject to such approvals and the satisfaction of the other conditions, the transaction is expected to be consummated in the latter part of 2020. Under the Investment Company Act of 1940, as amended (the “1940 Act”), consummation of the transaction will result in the automatic termination of the management and subadvisory agreements. Therefore, the fund’s Board of Trustees has approved new management and subadvisory agreements that will be presented to the shareholders of the fund for their approval. Additional informational materials will be mailed to shareholders.

Portfolio managers: Primary responsibility for the day-to-day management of the fund lies with the following portfolio managers.

You may purchase, redeem or exchange shares of the fund each day the New York Stock Exchange is open, at the fund’s net asset value determined after receipt of your request in good order, subject to any applicable sales charge.

The fund’s initial and subsequent investment minimums generally are set forth in the accompanying table:

Your Service Agent may impose higher or lower investment minimums, or may impose no minimum investment requirement.

For more information about how to purchase, redeem or exchange shares, and to learn which classes of shares are available to you, you should contact your Service Agent, or, if you hold your shares or plan to purchase shares through the fund, you should contact the fund by phone at 1-877-721-1926, by regular mail at Legg Mason Funds, P.O. Box 9699, Providence, RI 02940-9699 or by express, certified or registered mail at Legg Mason Funds, 4400 Computer Drive, Westborough, MA 01581.

The fund’s distributions are generally taxable as ordinary income or capital gains.

The fund’s related companies pay Service Agents for the sale of fund shares, shareholder services and other purposes. These payments create a conflict of interest by influencing your Service Agent or its employees or associated persons to recommend the fund over another investment. Ask your financial adviser or salesperson or visit your Service Agent’s or salesperson’s website for more information.

The fund’s investment objective may be changed by the Board without shareholder approval and on notice to shareholders.

The fund is classified as “non-diversified,” which means it may invest a larger percentage of its assets in a smaller number of issuers than a diversified fund.

The fund’s investment strategies and policies may be changed from time to time without shareholder approval, unless specifically stated otherwise in this Prospectus or in the SAI.

The fund may invest in securities of any maturity. The maturity of a fixed income security is a measure of the time remaining until the final payment on the security is due. The weighted average effective duration of the fund’s portfolio, including derivatives, however, is expected to range from 0 to 10 years. The fund’s investments may be of any duration.

Effective duration seeks to measure the expected sensitivity of market price to changes in interest rates, taking into account the anticipated effects of particular features of a security (for example, some bonds can be prepaid by the issuer). The assumptions that are made about a security’s features and options when calculating effective duration may prove to be incorrect. As a result, investors should be aware that effective duration is not an exact measurement and may not reliably predict a security’s price sensitivity to changes in yield or interest rates.

Generally, the longer a fund’s effective duration, the more sensitive it will be to changes in interest rates. For example, if interest rates rise by 1%, a fund with a two year effective duration would expect the value of its portfolio to decrease by 2% and a fund with a ten year effective duration would expect the value of its portfolio to decrease by 10%, all other factors being equal.

The maturity of a security may be significantly longer than its effective duration. A security’s maturity may be more relevant than its effective duration in determining the security’s sensitivity to other factors such as changes in credit quality or in the difference in yield between U.S. Treasuries and certain other types of securities.

The fund may hold debt securities of any credit quality, whether rated or unrated.

The fund may engage in active and frequent trading to achieve its investment objective, resulting in high portfolio turnover.

The fund may engage in a variety of transactions using derivatives, such as forwards, futures, options, mortgage derivatives, structured notes and swaps (including buying and selling credit default swaps). Derivatives are financial instruments whose value depends upon, or is derived from, the value of something else, such as one or more underlying investments, indexes or currencies. Derivatives may be used by the fund for any of the following purposes:

The fund from time to time may sell protection on debt securities by entering into credit default swaps. In these transactions, the fund is generally required to pay the par (or other agreed-upon) value of a referenced debt security to the counterparty in the event of a default on or downgrade of the debt security and/or a similar credit event. In return, the fund receives from the counterparty a periodic stream of payments over the term of the contract. If no default occurs, the fund keeps the stream of payments and has no payment obligations. As the seller, the fund would effectively add leverage to its portfolio because, in addition to its net assets, the fund would be subject to loss on the par (or other agreed-upon) value it had undertaken to pay. Credit default swaps may also be structured based on an index or the debt of a basket of issuers, rather than a single issuer, and may be customized with respect to the default event that triggers purchase or other factors (for example, a particular number of defaults within a basket, or defaults by a particular combination of issuers within the basket, may trigger a payment obligation).

The fund may buy credit default swaps to hedge against the risk of default of debt securities held in its portfolio or for other reasons. As the buyer of a credit default swap, the fund would make the stream of payments described in the preceding paragraph to the seller of the credit default swap and would expect to receive from the seller a payment in the event of a default on the underlying debt security or other specified event.

Using derivatives, especially for non-hedging purposes, may involve greater risks to the fund than investing directly in securities, particularly as these instruments may be very complex and may not behave in the manner anticipated by the fund. Certain derivative transactions may have a leveraging effect on the fund.

Use of derivatives or similar instruments may have different tax consequences for the fund than an investment in the underlying security, and those differences may affect the amount, timing and character of income distributed to shareholders.

When the fund enters into derivative transactions, it may be required to segregate assets, or enter into offsetting positions, in accordance with applicable regulations. Such segregation will not limit the fund’s exposure to loss, however, and the fund will have investment risk with respect to both the derivative itself and the assets that have been segregated to cover the fund’s derivative exposure. If the segregated assets represent a large portion of the fund’s portfolio, this may impede portfolio management or the fund’s ability to meet redemption requests or other current obligations.

Instead of, and/or in addition to, investing directly in particular securities, the fund may use derivatives and other synthetic instruments that are intended to provide economic exposure to securities, issuers or other measures of market or economic value. The fund may use one or more types of these instruments without limit.

Fixed income securities represent obligations of corporations, governments and other entities to repay money borrowed, usually at the maturity of the security. These securities may pay fixed, variable or floating rates of interest. However, some fixed income securities, such as zero coupon bonds, do not pay current interest but are issued at a discount from their face values. Other debt instruments, such as certain mortgage-backed and other asset-backed securities, make periodic payments of interest and/or principal. Some debt instruments are partially or fully secured by collateral supporting the payment of interest and principal. “Fixed income securities” are commonly referred to as “notes,” “loans,” “debt,” “debt obligations,” “debt securities,” “corporate debt,” “bonds” and “corporate bonds,” and these terms are used in this Prospectus interchangeably, and, where used, are not intended to be limiting. Fixed income securities also include certain hybrid securities, such as preferred stock.

Fixed income securities in which the fund may invest are high yield debt (often called “junk bonds”); debt securities issued or guaranteed by national governments, their agencies or instrumentalities and political sub-divisions (including inflation index linked securities and municipal bonds); debt securities of supranational organizations such as bonds, debentures and freely transferable promissory notes; corporate debt securities, including debentures, bonds (including zero coupon bonds), convertible and non-convertible notes, commercial paper, certificates of deposits, freely transferable promissory notes and bankers acceptances issued by industrial, utility, finance, commercial banking or bank holding company organizations; mortgage-backed securities (including collateralized debt obligations); asset-backed securities; and emerging markets debt.

Corporate debt securities are fixed income securities usually issued by businesses to finance their operations. Various types of business entities may issue these securities, including corporations, trusts, limited partnerships, limited liability companies and other types of non-governmental legal entities. Notes, bonds, debentures and commercial paper are the most common types of corporate debt securities, with the primary difference being their maturities and secured or unsecured status. Commercial paper has the shortest term and is usually unsecured. The broad category of corporate debt securities includes debt issued by U.S. or non-U.S. companies of all kinds, including those with small, mid and large capitalizations. Corporate debt may carry variable or floating rates of interest.

The primary risk in an investment in loans is that borrowers may be unable to meet their interest and/or principal payment obligations. Loans in which the fund invests may be made to finance highly leveraged borrowers which may make such loans especially vulnerable to adverse changes in economic or market conditions. Loans in which the fund may invest may be either collateralized or uncollateralized and senior or subordinate. Investments in uncollateralized and/or subordinate loans entail a greater risk of nonpayment than do investments in loans that hold a more senior position in the borrower’s capital structure and/or are secured with collateral. In addition, loans are generally subject to illiquidity risk. The fund may acquire an interest in loans by purchasing participations in and/or assignments of portions of loans from third parties or by investing in pools of loans, such as collateralized debt obligations as further described under “Mortgage-backed and asset-backed securities.” Transactions in loans may settle on a delayed basis. As a result, the proceeds from the sale of a loan may not be available to make additional investments or to meet the fund’s redemption obligations. Bank loans may not be considered securities and therefore, the fund may not have the protections afforded by U.S. federal securities laws with respect to such investments.

securities may decline if their interest rates do not rise as much, or as quickly, as other interest rates. Conversely, these securities will not generally increase in value if interest rates decline. The fund may also invest in inverse floating rate debt instruments (“inverse floaters”). Interest payments on inverse floaters vary inversely with changes in interest rates. Inverse floaters pay higher interest (and therefore generally increase in value) when interest rates decline, and vice versa. An inverse floater may exhibit greater price volatility than a fixed rate obligation of similar credit quality.

The fund may invest without limit in both U.S. dollar and non-U.S. dollar denominated securities of foreign issuers. The value of the fund’s foreign securities may decline because of unfavorable government actions, political instability or the more limited availability of accurate information about foreign issuers, as well as factors affecting the particular issuers. The fund may invest in foreign securities issued by issuers located in emerging market countries. To the extent the fund invests in these securities, the risks associated with investment in foreign issuers will generally be more pronounced.

The fund may invest in sovereign debt, including emerging market sovereign debt. Sovereign debt securities may include:

Sovereign government and supranational debt involve many of the risks of foreign and emerging markets investments as well as the risk of debt moratorium, repudiation or renegotiation and the fund may be unable to enforce its rights against the issuers.

The fund may engage in non-U.S. currency exchange transactions in an effort to protect against uncertainty in the level of future exchange rates or to enhance returns based on expected changes in exchange rates. Non-U.S. currency exchange transactions may take the form of options, futures, options on futures, swaps, warrants, structured notes, forwards or spot (cash) transactions. The value of these non-U.S. currency transactions depends on, and will vary based on fluctuations in, the value of the underlying currency relative to the U.S. dollar.

The fund may invest in distressed debt securities. Distressed debt securities are debt securities that are subject to bankruptcy proceedings or are in default or are at imminent risk of being in default. Distressed debt securities are speculative and involve substantial risk. Generally, the fund will invest in distressed debt securities when the portfolio managers believe they offer significant potential for higher returns or can be exchanged for other securities (e.g., equity securities) that offer this potential. However, there can be no assurance that the issuer will make an exchange offer or adopt a plan of reorganization. The fund will generally not receive interest payments on the distressed debt securities and may incur costs to protect its investment. In addition, principal may not be repaid. Distressed debt securities and any securities received in an exchange may be difficult to sell and may be subject to restriction on resale.

U.S. government securities are obligations of, or guaranteed by, the U.S. government, its agencies or government-sponsored entities. U.S. government securities include issues by non-governmental entities (like financial institutions) that carry direct guarantees from U.S. government agencies as part of government initiatives in response to the market crisis or otherwise. Although the U.S. government guarantees principal and interest payments on securities issued by the U.S. government and some of its agencies, such as securities issued by the Government National Mortgage Association (“Ginnie Mae”), this guarantee does not apply to losses resulting from declines in the market value of these securities. Some of the U.S. government securities that the fund may hold are not guaranteed or backed by the full faith and credit of the U.S. government, such as those issued by Fannie Mae (formally known as the Federal National Mortgage Association) and Freddie Mac (formally known as the Federal Home Loan Mortgage Corporation).

Mortgage-backed securities may be issued by private issuers, by U.S. government-sponsored entities such as Fannie Mae or Freddie Mac or by agencies of the U.S. government, such as Ginnie Mae. Mortgage-backed securities represent direct or indirect participations in, or are collateralized by and payable from, mortgage loans secured by real property.

Unlike mortgage-backed securities issued or guaranteed by agencies of the U.S. government or government-sponsored entities, mortgage-backed securities issued by private issuers do not have a government or government-sponsored entity guarantee (but may have other credit enhancement), and may, and frequently do, have less favorable collateral, credit risk or other underwriting characteristics.

Residential mortgage-backed securities (“RMBS”) are comprised of a pool of mortgage loans created by banks and other financial institutions. Commercial mortgage-backed securities (“CMBS”) are a type of mortgage-backed security backed by commercial mortgages rather than residential real estate.

Asset-backed securities represent participations in, or are secured by and payable from, assets such as installment sales or loan contracts, leases, credit card receivables and other categories of receivables.

Collateralized mortgage obligations (“CMOs”) are debt obligations collateralized by mortgage loans or mortgage pass-through securities. CMOs are a type of mortgage-backed security. Typically, CMOs are collateralized by Ginnie Mae, Fannie Mae or Freddie Mac Certificates, but may also be collateralized by whole loans or private pass-throughs (referred to as “Mortgage Assets”). Payments of principal and of interest on the Mortgage Assets, and any reinvestment income thereon, provide the issuer with income to pay debt service on the CMOs. In a CMO, a series of bonds or certificates is issued in multiple classes. Each class of CMOs, often referred to as a “tranche,” is issued at a specified fixed or floating coupon rate and has a stated maturity or final distribution date. Principal prepayments on the Mortgage Assets may cause the CMOs to be retired substantially earlier than their stated maturities or final distribution dates. Interest is paid or accrues on all classes of the CMOs on a monthly, quarterly or semi-annual basis. The principal of and interest on the Mortgage Assets may be allocated among the several classes of a series of a CMO in innumerable ways. As market conditions change, and particularly during periods of rapid or unanticipated changes in market interest rates, the attractiveness of the CMO classes and the ability of the structure to provide the anticipated investment characteristics may be significantly reduced. Such changes can result in volatility in the market value, and in some instances reduced liquidity, of the CMO class.

Collateralized debt obligations (“CDOs”) are a type of asset-backed security. CDOs include collateralized bond obligations (“CBOs”), collateralized loan obligations (“CLOs”) and other similarly structured securities. A CBO is a trust or other special purpose entity which is typically backed by a diversified pool of fixed income securities (which may include high risk, below investment grade securities). A CLO is a trust or other special purpose entity that is typically collateralized by a pool of loans, which may also include, among others, domestic and non-U.S. senior secured loans, senior unsecured loans, and subordinated corporate loans, including loans that may be rated below investment grade or equivalent unrated loans. Like CMOs, CDOs generally issue separate series or “tranches” which vary with respect to risk and yield. These tranches can experience substantial losses due to actual defaults, increased sensitivity to defaults due to collateral default and disappearance of subordinate tranches, market anticipation of defaults, as well as investor aversion to CDO securities as a class. Interest on certain tranches of a CDO may be paid in kind (paid in the form of obligations of the same type rather than cash), which involves continued exposure to default risk with respect to such payments.

When-issued securities, delayed delivery, to be announced and forward commitment transactions

Securities purchased in when-issued, delayed delivery, to be announced or forward commitment transactions will not be delivered or paid for immediately. The fund will set aside assets to pay for these securities at the time of the agreement. Such transactions involve a risk of loss, for example, if the value of the securities declines prior to the settlement date or if the assets set aside to pay for these securities decline in value prior to the settlement date. Therefore, these transactions may have a leveraging effect on the fund, making the value of an investment in the fund more volatile and increasing the fund’s overall investment exposure. Typically, no income accrues on securities the fund has committed to purchase prior to the time delivery of the securities is made, although the fund may earn income on securities it has set aside to cover these positions. Recently finalized rules of the Financial Industry Regulatory Authority (“FINRA”) impose mandatory margin requirements for certain types of when-issued, to be announced or forward commitment transactions, with limited exceptions. Such transactions historically have not been required to be collateralized, and mandatory collateralization could increase the cost of such transactions and impose added operational complexity.

Zero coupon, pay-in-kind and deferred interest securities may be used by issuers to manage cash flow and maintain liquidity. Zero coupon securities pay no interest during the life of the obligation but are issued at prices below their stated maturity value. Because zero coupon securities pay no interest until maturity, their prices may fluctuate more than other types of securities with the same maturity in the secondary market. However, zero coupon bonds are useful as a tool for managing duration.

Pay-in-kind securities have a stated coupon, but the interest is generally paid in the form of obligations of the same type as the underlying pay-in-kind securities (e.g., bonds) rather than in cash. These securities are more sensitive to the credit quality of the underlying issuer and their secondary market prices may fluctuate more than other types of securities with the same maturity.

Deferred interest securities are obligations that generally provide for a period of delay before the regular payment of interest begins and are issued at a significant discount from face value.

Certain zero coupon, pay-in-kind and deferred interest securities are subject to tax rules applicable to debt obligations acquired with “original issue discount.” The fund would generally have to accrue income on these securities for federal income tax purposes before it receives corresponding cash payments. Because the fund intends to make sufficient annual distributions of its taxable income, including accrued non-cash income, in order to maintain its federal income tax status and avoid fund-level income and excise taxes, the fund might be required to liquidate portfolio securities at a disadvantageous time, or borrow cash, to make these distributions. The fund also accrues income on these securities prior to receipt for accounting

purposes. To the extent it is deemed collectible, accrued income is taken into account when calculating the value of these securities and the fund’s net asset value per share, in accordance with the fund’s valuation policies.

In a forward roll transaction (also referred to as a mortgage dollar roll), the fund sells a mortgage-backed security while simultaneously agreeing to purchase a similar security from the same party (the counterparty) on a specified future date at a lower fixed price. During the roll period, the fund forgoes principal and interest paid on the securities. The fund is compensated by the difference between the current sales price and the forward price for the future purchase as well as by the interest earned on the cash proceeds of the initial sale. The fund may enter into a forward roll transaction with the intention of entering into an offsetting transaction whereby, rather than accepting delivery of the security on the specified date, the fund sells the security and agrees to repurchase a similar security at a later time.

Investments in forward roll transactions involve a risk of loss if the value of the securities that the fund is obligated to purchase declines below the purchase price prior to the repurchase date. Forward roll transactions may have a leveraging effect on the fund (see “When-issued securities, delayed delivery, to be announced and forward commitment transactions”).

The fund may invest in preferred stock and convertible securities. Preferred stock represents equity ownership of an issuer that generally entitles the holder to receive, in preference to the holders of common stock, dividends and a fixed share of the proceeds resulting from a liquidation of the company. Preferred stocks may pay dividends at fixed or variable rates. Convertible fixed income securities convert into shares of common stock of their issuer. Preferred stock and convertible fixed income securities share investment characteristics of both fixed income and equity securities. However, the value of these securities tends to vary more with fluctuations in the underlying common stock and less with fluctuations in interest rates and tends to exhibit greater volatility.

Although the fund invests principally in fixed income securities and related investments, the fund may from time to time invest in or receive equity securities and equity-like securities, which may include warrants, rights, exchange traded and over-the-counter common stocks, preferred stock, depositary receipts, trust certificates, limited partnership interests and shares of other investment companies, including exchange-traded funds, and real estate investment trusts. The fund may invest in or receive equity securities for which there exists no private or public market.

Equity securities represent an ownership interest in the issuing company. Holders of equity securities are not creditors of the company, and in the event of the liquidation of the company, would be entitled to their pro rata share of the company’s assets, if any, after creditors, including the holders of fixed income securities, and holders of any senior equity securities are paid. Equity securities typically fluctuate in price more than fixed income securities.

Warrants and rights permit, but do not obligate, their holders to subscribe for other securities. Warrants and rights are subject to the same market risks as stocks, but may be more volatile in price. An investment in warrants or rights may be considered speculative. In addition, the value of a warrant or right does not necessarily change with the value of the underlying securities and a warrant or right ceases to have value if it is not exercised prior to its expiration date.

The fund may invest in various types of structured instruments, including securities that have demand, tender or put features, or interest rate reset features. These may include instruments issued by structured investment or special purpose vehicles or conduits, and may be asset-backed or mortgage-backed securities. Structured instruments may take the form of participation interests or receipts in underlying securities or other assets, and in some cases are backed by a financial institution serving as a liquidity provider. The interest rate or principal amount payable at maturity on a structured instrument may vary based on changes in one or more specified reference factors, such as currencies, interest rates, commodities, indices or other financial indicators. Changes in the underlying reference factors may result in disproportionate changes in amounts payable under a structured instrument. Some of these instruments may have an interest rate swap feature which substitutes a floating or variable interest rate for the fixed interest rate on an underlying asset or index. Structured instruments are a type of derivative instrument and the payment and credit qualities of these instruments derive from the assets embedded in the structure. For structured securities that have embedded leverage features, small changes in interest or prepayment rates may cause large and sudden price movements. Structured instruments are often subject to heightened illiquidity risk.

Inflation-indexed and inflation-protected securities are fixed income securities that are structured to provide protection against inflation and whose principal value or coupon (interest payment) is periodically adjusted according to the rate of inflation. If the index measuring inflation falls, the principal value or coupon of these securities will be adjusted downward. Consequently, the interest payable on these securities will be reduced. Also, if the principal value of these securities is adjusted according to the rate of inflation, the adjusted principal value repaid at maturity may be less than the original principal.

Inflation-protected securities denominated in the U.S. dollar include U.S. Treasury Inflation Protected Securities (“U.S. TIPS”), as well as other bonds issued by U.S. and non-U.S. government agencies and instrumentalities or corporations and derivatives related to these securities. U.S. TIPS are

inflation-protected securities issued by the U.S. Department of the Treasury the principal amounts of which are adjusted daily based upon changes in the rate of inflation (as currently represented by the non-seasonally adjusted Consumer Price Index for All Urban Consumers, calculated with a three-month lag). U.S. TIPS pay interest semiannually, equal to a fixed percentage of the inflation-adjusted principal amount. The interest rate on these bonds is fixed at issuance, but over the life of the bond, this interest may be paid on an increasing or decreasing principal amount that has been adjusted for inflation. The current market value of U.S. TIPS is not guaranteed and will fluctuate.

The value of inflation-indexed and inflation-protected securities held by the fund fluctuates in response to changes in real interest rates. In addition, if nominal interest rates increase at a faster rate than inflation, causing real interest rates to rise, it will lead to a decrease in the value of inflation-indexed or inflation-protected securities.

The fund may invest in other fixed-income securities that, in the belief of the fund’s subadviser, will provide protection against inflation, including floating rate and other short duration securities. Floating rate securities bear interest at rates that are not fixed but vary with changes in specified market rates or indices, such as the prime rate, and at specified intervals.

Credit rating or credit quality of a security is determined at the time of purchase. If, after purchase, the credit rating on a security is downgraded or the credit quality deteriorates, or if the duration of a security is extended, the subadviser will decide whether the security should be held or sold. Upon the occurrence of certain triggering events or defaults on a security held by the fund, or if an obligor of such a security has difficulty meeting its obligations, the fund may obtain a new or restructured security or underlying assets. In that case, the fund may become the holder of securities or other assets that it could not purchase or might not otherwise hold (for example, because they are of lower quality or are subordinated to other obligations of the issuer) at a time when those assets may be difficult to sell or can be sold only at a loss. In addition, the fund may incur expenses in an effort to protect the fund’s interest in securities experiencing these events.

The fund may invest in securities of other investment companies to the extent permitted under the Investment Company Act of 1940, as amended, and the rules thereunder (the “1940 Act”). The return on investments in other registered investment companies will be reduced by the operating expenses, including investment advisory expenses, of such companies, and by any sales loads or other distribution and/or service fees or charges incurred in purchasing or selling shares of such companies, in addition to the fund’s own fees and expenses. As such, there is a layering of fees and expenses.

The fund may hold cash pending investment, may invest in money market instruments and may enter into repurchase agreements and reverse repurchase agreements (which have characteristics like borrowings) for cash management purposes. The fund may invest in money market funds, which may or may not be affiliated with the fund’s manager or the subadviser. The amount of assets the fund may hold for cash management purposes will depend on market conditions and the need to meet expected redemption requests.

The fund may depart from its principal investment strategies in response to adverse market, economic or political conditions by taking temporary defensive positions, including by investing in any type of investment grade, government, corporate and money market instruments and short-term debt securities or holding cash without regard to any percentage limitations. Although the subadviser has the ability to take defensive positions, it may choose not to do so for a variety of reasons, even during volatile market conditions.

The fund may also use other strategies and invest in other investments that are described, along with their risks, in the Statement of Additional Information (“SAI”). However, the fund might not use all of the strategies and techniques or invest in all of the types of investments described in this Prospectus or in the SAI.

For purposes of the fund’s limitations expressed as a percentage of assets or net assets, the term “assets” or “net assets,” as applicable, means net assets plus the amount of any borrowings for investment purposes. The fund’s compliance with its investment limitations and requirements described in this Prospectus is usually determined at the time of investment. If such a percentage limitation is complied with at the time of an investment, any subsequent change in percentage resulting from a change in asset values or characteristics, a sale of securities or a change in credit quality will not constitute a violation of that limitation.

In making investment decisions on behalf of the fund, the subadviser combines a top-down, macroeconomic perspective with a bottom-up sector allocation and security selection process based on quantitative measures and fundamental considerations. The macroeconomic perspective is based on global, regional and country input variables—including economic growth, inflation, monetary policy, fiscal policy and business cycles—which inform country, currency, duration and credit decisions within the portfolio. In determining sector allocation and security selection, the portfolio

managers apply quantitative screens to a global universe of thousands of securities, seeking to identify sectors and securities that, in the portfolio managers’ opinion, offer the potential for greater yield, greater total return, and/or lower risk. The universe of securities is narrowed to approximately 200 securities by considering a range of factors including sector economics and risks, yield and option-adjusted spread analysis, and/or the probability of credit default or coercive restructuring. The universe is then evaluated by the portfolio managers based on traditional fundamental metrics such as recovery rate, free cash flow before working capital, debt maturity schedules, strength of business model, valuations based on sector and security analysis, taking into account material environmental, social and governance (ESG) issues that may impact an investment’s risk profile and performance.

Following is more information on the principal risks summarized above and additional risks of investing in the fund.

Market and interest rate risk. The market prices of the fund’s securities may go up or down, sometimes rapidly or unpredictably. If the market prices of the fund’s securities fall, the value of your investment in the fund will decline. The market price of a security may fall due to general market conditions, such as real or perceived adverse economic or political conditions, tariffs and trade disruptions, inflation, changes in interest or currency rates, lack of liquidity in the bond markets or adverse investor sentiment. Changes in market conditions will not typically have the same impact on all types of securities. The market price of a security may also fall due to specific conditions that affect a particular sector of the securities market or a particular issuer. Your fund shares at any point in time may be worth less than what you invested, even after taking into account the reinvestment of fund dividends and distributions.

The market prices of securities may fluctuate significantly when interest rates change. When interest rates rise, the value of fixed income securities, and therefore the value of your investment in the fund, generally goes down. Generally, the longer the maturity or duration of a fixed income security, the greater the impact of a rise in interest rates on the security’s market price. However, calculations of duration and maturity may be based on estimates and may not reliably predict a security’s price sensitivity to changes in interest rates. Moreover, securities can change in value in response to other factors, such as credit risk. In addition, different interest rate measures (such as short- and long-term interest rates and U.S. and non-U.S. interest rates), or interest rates on different types of securities or securities of different issuers, may not necessarily change in the same amount or in the same direction. When interest rates go down, the fund’s yield will decline. Also, when interest rates decline, investments made by the fund may pay a lower interest rate, which would reduce the income received by the fund.

against the issuer or changes in government regulations affecting the issuer or the competitive environment. The fund may experience a substantial or complete loss on an individual security.

Model risk. Investment models may not adequately take into account certain factors and may result in the fund having a lower return than if the fund were managed using another model or investment strategy. In addition, investment models used by the subadviser to evaluate securities or securities markets are based on certain assumptions concerning the interplay of market factors. The markets or the prices of individual securities may be affected by factors not foreseen in developing the models. When a model or data used in managing the fund contains an error, or is incorrect or incomplete, any investment decision made in reliance on the model or data may not produce the desired results and the fund may realize losses.

Credit risk. The value of your investment in the fund could decline if the issuer of a security held by the fund or another obligor for that security (such as a party offering credit enhancement) fails to pay, otherwise defaults, is perceived to be less creditworthy, becomes insolvent or files for bankruptcy. The value of your investment in the fund could also decline if the credit rating of a security held by the fund is downgraded or the credit quality or value of any assets underlying the security declines. If the fund enters into financial contracts (such as certain derivatives, repurchase agreements, reverse repurchase agreements, and when-issued, delayed delivery and forward commitment transactions), the fund will be subject to the credit risk presented by the counterparty. In addition, the fund may incur expenses in an effort to protect the fund’s interests or to enforce its rights against an issuer, guarantor or counterparty or may be hindered or delayed in exercising those rights. Credit risk is broadly gauged by the credit ratings of the securities in which the fund invests. However, ratings are only the opinions of the companies issuing them and are not guarantees as to quality. Securities rated in the lowest category of investment grade (Baa/BBB) may possess certain speculative characteristics. Credit risk is typically greatest for the fund’s high yield debt securities, which are rated below the Baa/BBB categories or unrated securities of comparable quality (“junk” bonds).

The fund may invest in securities which are subordinated to more senior securities of the issuer, or which represent interests in pools of such subordinated securities. The fund is more likely to suffer a credit loss on subordinated securities than on non-subordinated securities of the same issuer. If there is a default, bankruptcy or liquidation of the issuer, most subordinated securities are paid only if sufficient assets remain after payment of the issuer’s non-subordinated securities. In addition, any recovery of interest or principal may take more time. As a result, even a perceived decline in creditworthiness of the issuer is likely to have a greater adverse impact on subordinated securities.

Prepayment or call risk. Many fixed income securities give the issuer the option to repay or call the security prior to its maturity date. Issuers often exercise this right when interest rates fall. Accordingly, if the fund holds a fixed income security subject to prepayment or call risk, it will not benefit fully from the increase in value that other fixed income securities generally experience when interest rates fall. Upon prepayment of the security, the fund would also be forced to reinvest the proceeds at then current yields, which would be lower than the yield of the security that was paid off. In addition, if the fund purchases a fixed income security at a premium (at a price that exceeds its stated par or principal value), the fund may lose the amount of the premium paid in the event of prepayment.

High yield (“junk”) bonds risk. High yield bonds, often called “junk” bonds, have a higher risk of issuer default or may be in default and are considered speculative. Changes in economic conditions or developments regarding the individual issuer are more likely to cause price volatility and weaken the capacity of such securities to make principal and interest payments than is the case for higher grade debt securities. The value of lower-quality debt securities often fluctuates in response to company, political, or economic developments and can decline significantly over short as well as long periods of time or during periods of general or regional economic difficulty. High yield bonds may also have lower liquidity as compared to higher-rated securities, which means the fund may have difficulty selling them at times, and it may have to apply a greater degree of judgment in establishing a price for purposes of valuing fund shares. High yield bonds generally are issued by less creditworthy issuers. Issuers of high yield bonds may have a larger amount of outstanding debt relative to their assets than issuers of investment grade bonds. In the event of an issuer’s bankruptcy, claims of other creditors may have priority over the claims of high yield bond holders, leaving few or no assets available to repay high yield bond holders. The fund may incur expenses to the extent necessary to seek recovery upon default or to negotiate new terms with a defaulting issuer. High yield bonds frequently have redemption features that permit an issuer to repurchase the security from the fund before it matures. If the issuer redeems high yield bonds, the fund may have to invest the proceeds in bonds with lower yields and may lose income.

liquid, less regulated, less transparent and more volatile markets. The markets for some foreign securities are relatively new, and the rules and policies relating to these markets are not fully developed and may change. The value of the fund’s investments may decline because of factors affecting the particular issuer as well as foreign markets and issuers generally, such as unfavorable or unsuccessful government actions, tariffs and tax disputes, reduction of government or central bank support, inadequate accounting standards, lack of information and political, economic, financial or social instability. Foreign investments may also be adversely affected by U.S. government or international economic sanctions, which could eliminate the value of an investment. To the extent the fund focuses its investments in a single country or only a few countries in a particular geographic region, economic, political, regulatory or other conditions affecting such country or region may have a greater impact on fund performance relative to a more geographically diversified fund.

The value of the fund’s foreign investments may also be affected by foreign tax laws, special U.S. tax considerations and restrictions on receiving the investment proceeds from a foreign country. Dividends or interest on, or proceeds from the sale or disposition of, foreign securities may be subject to non-U.S. withholding or other taxes.

It may be difficult for the fund to pursue claims against a foreign issuer or other parties in the courts of a foreign country. Some securities issued by non-U.S. governments or their subdivisions, agencies and instrumentalities may not be backed by the full faith and credit of such governments. Even where a security is backed by the full faith and credit of a government, it may be difficult for the fund to pursue its rights against the government. In the past, some non-U.S. governments have defaulted on principal and interest payments. In certain foreign markets, settlement and clearance procedures may result in delays in payment for or delivery of securities not typically associated with settlement and clearance of U.S. investments.

If the fund buys securities denominated in a foreign currency, receives income in foreign currencies, or holds foreign currencies from time to time, the value of the fund’s assets, as measured in U.S. dollars, can be affected unfavorably by changes in exchange rates relative to the U.S. dollar or other foreign currencies. Currency exchange rates can be volatile, and are affected by factors such as general economic conditions, the actions of the U.S. and foreign governments or central banks, the imposition of currency controls and speculation. The fund may be unable or may choose not to hedge its foreign currency exposure.

In certain foreign markets, settlement and clearance of trades may experience delays in payment for or delivery of securities not typically associated with settlement and clearance of U.S. investments. Settlement of trades in these markets can take longer than in other markets and the fund may not receive its proceeds from the sale of certain securities for an extended period (possibly several weeks or even longer) due to, among other factors, low trading volumes and volatile prices. The custody or holding of securities, cash and other assets by local banks, agents and depositories in securities markets outside the United States may entail additional risks. Governments or trade groups may compel local agents to hold securities in designated depositories that may not be subject to independent evaluation. Local agents are held only to the standards of care of their local markets, and thus may be subject to limited or no government oversight. In extreme cases, the fund’s securities may be misappropriated or the fund may be unable to sell its securities. In general, the less developed a country’s securities market is, the greater the likelihood of custody problems.

The risks of foreign investments are heightened when investing in issuers in emerging market countries. Emerging market countries tend to have economic, political and legal systems that are less developed and are less stable than those of more developed countries. They are often particularly sensitive to market movements because their market prices tend to reflect speculative expectations. Low trading volumes may result in a lack of liquidity and in extreme price volatility. Investors should be able to tolerate sudden, sometimes substantial, fluctuations in the value of investments in emerging markets. Emerging market countries may have policies that restrict investment by foreigners or that prevent foreign investors from withdrawing their money at will.

Mortgage-backed and asset-backed securities risk. Mortgage-backed securities are particularly susceptible to prepayment and extension risks, because prepayments on the underlying mortgages tend to increase when interest rates fall and decrease when interest rates rise. Prepayments may also occur on a scheduled basis or due to foreclosure. When market interest rates increase, mortgage refinancings and prepayments slow, which lengthens the effective duration of these securities. As a result, the negative effect of the interest rate increase on the market value of mortgage-backed securities is usually more pronounced than it is for other types of fixed income securities, potentially increasing the volatility of the fund. Conversely, when market interest rates decline, while the value of mortgage-backed securities may increase, the rates of prepayment of the underlying mortgages tend to increase, which shortens the effective duration of these securities. Mortgage-backed securities are also subject to the risk that underlying borrowers will be unable to meet their obligations.

At times, some of the mortgage-backed securities in which the fund may invest will have higher than market interest rates and therefore will be purchased at a premium above their par value. Prepayments may cause losses on securities purchased at a premium.

The value of mortgage-backed securities may be affected by changes in credit quality or value of the mortgage loans or other assets that support the securities. In addition, for mortgage-backed securities, when market conditions result in an increase in the default rates on the underlying mortgages and the foreclosure values of the underlying real estate are below the outstanding amount of the underlying mortgages, collection of the full amount of accrued interest and principal on these investments may be doubtful. For mortgage derivatives and structured securities that have embedded leverage features, small changes in interest or prepayment rates may cause large and sudden price movements. Mortgage derivatives can also become illiquid and hard to value in declining markets.

Asset-backed securities are structured like mortgage-backed securities and are subject to many of the same risks. The ability of an issuer of asset-backed securities to enforce its security interest in the underlying assets or to otherwise recover from the underlying obligor may be limited. Certain asset-backed securities present a heightened level of risk because, in the event of default, the liquidation value of the underlying assets may be inadequate to pay any unpaid principal or interest.

Zero coupon bond risk. The value of zero coupon bonds is subject to greater fluctuation in response to changes in market interest rates than bonds which make regular payments of interest. This type of bond allows an issuer to avoid the need to generate cash to meet current interest payments. Accordingly, such bonds may involve greater credit risks than bonds which make regular payments of interest. Even though zero coupon bonds do not pay current interest in cash, the fund is required to accrue interest income on such investments and may be required to distribute that income at least annually to shareholders. Thus, the fund could be required at times to liquidate other investments in order to satisfy its dividend requirements.

Derivatives risk. Derivatives involve special risks and costs and may result in losses to the fund, even when used for hedging purposes. Using derivatives can increase losses and reduce opportunities for gains when market prices, interest rates, currencies, or the derivatives themselves behave in a way not anticipated by the fund, especially in abnormal market conditions. Using derivatives also can have a leveraging effect which may increase investment losses and increase the fund’s volatility, which is the degree to which the fund’s share price may fluctuate within a short time period. Certain derivatives have the potential for unlimited loss, regardless of the size of the initial investment. The other parties to certain derivatives transactions present the same types of credit risk as issuers of fixed income securities.

The fund’s counterparty to a derivative transaction may not honor its obligations in respect to the transaction. In certain cases, the fund may be hindered or delayed in exercising remedies against or closing out derivative instruments with a counterparty, which may result in additional losses.

Derivatives also tend to involve greater illiquidity risk and they may be difficult to value. The fund may be unable to terminate or sell its derivative positions. In fact, many over-the-counter derivatives will not have liquidity except through the counterparty to the instrument. Derivatives are generally subject to the risks applicable to the assets, rates, indices or other indicators underlying the derivative. The value of a derivative may fluctuate more than the underlying assets, rates, indices or other indicators to which it relates. Use of derivatives or similar instruments may have different tax consequences for the fund than an investment in the underlying security, and those differences may affect the amount, timing and character of income distributed to shareholders. The fund’s use of derivatives may also increase the amount of taxes payable by shareholders. The U.S. government and foreign governments are in the process of adopting and implementing regulations governing derivatives markets, including mandatory clearing of certain derivatives, margin, and reporting requirements. The ultimate impact of the regulations remains unclear. Additional regulation of derivatives may make derivatives more costly, limit their availability or utility, otherwise adversely affect their performance or disrupt markets. The fund may be exposed to additional risks as a result of the additional regulations. The extent and impact of the additional regulations are not yet fully known and may not be for some time.

Investments by the fund in structured securities, a type of derivative, raise certain tax, legal, regulatory and accounting issues that may not be presented by direct investments in securities. These issues could be resolved in a manner that could hurt the performance of the fund.

Swap agreements tend to shift the fund’s investment exposure from one type of investment to another. For example, the fund may enter into interest rate swaps, which involve the exchange of interest payments by the fund with another party, such as an exchange of floating rate payments for fixed interest rate payments with respect to a notional amount of principal. If an interest rate swap intended to be used as a hedge negates a favorable interest rate movement, the investment performance of the fund would be less than what it would have been if the fund had not entered into the interest rate swap.

Credit default swap contracts involve heightened risks and may result in losses to the fund. Credit default swaps may be illiquid and difficult to value. If the fund buys a credit default swap, it will be subject to the risk that the credit default swap may expire worthless, as the credit default swap would only generate income in the event of a default on the underlying debt security or other specified event. As a buyer, the fund would also be subject to credit risk relating to the seller’s payment of its obligations in the event of a default (or similar event). If the fund sells a credit default swap, it will be exposed to the credit risk of the issuer of the obligation to which the credit default swap relates. As a seller, the fund would also be subject to leverage risk, because it would be liable for the full notional amount of the swap in the event of a default (or similar event). The fund would also be subject to the risk of loss on any securities segregated to cover the fund’s expenses under the swap.

the fund may not be able to enter into swaps that meet its investment needs. The fund also may not be able to find a clearinghouse willing to accept a swap for clearing. In a cleared swap, a central clearing organization will be the counterparty to the transaction. The fund will assume the risk that the clearinghouse may be unable to perform its obligations.

The fund will be required to maintain its positions with a clearing organization through one or more clearing brokers. The clearing organization will require the fund to post margin and the broker may require the fund to post additional margin to secure the fund’s obligations. The amount of margin required may change from time to time. In addition, cleared transactions may be more expensive to maintain than over-the-counter transactions and may require the fund to deposit larger amounts of margin. The fund may not be able to recover margin amounts if the broker has financial difficulties. Also, the broker may require the fund to terminate a derivatives position under certain circumstances. This may cause the fund to lose money.

Futures are standardized, exchange-traded contracts that obligate a purchaser to take delivery, and a seller to make delivery, of a specific amount of an asset at a specified future date at a specified price. The primary risks associated with the use of futures contracts are: (a) the imperfect correlation between the change in market value of the instruments held by the fund and the price of the futures contract; (b) the possible lack of a liquid secondary market for a futures contract and the resulting inability to close a futures contract when desired; (c) losses caused by unanticipated market movements, which are potentially unlimited; (d) the subadviser’s inability to predict correctly the direction of securities prices, interest rates, currency exchange rates and other economic factors; and (e) the possibility that the counterparty will default in the performance of its obligations.

An option is an agreement that, for a premium payment or fee, gives the option holder (the purchaser) the right but not the obligation to buy (a “call option”) or sell (a “put option”) the underlying asset (or settle for cash in an amount based on an underlying asset, rate, or index) at a specified price (the “exercise price”) during a period of time or on a specified date. The fund may write a call or put option where it (i) owns or is short the underlying security in the case of a call or put option, respectively (sometimes referred to as a “covered option”), or (ii) does not own or is not short such security (sometimes referred to as a “naked option”). When the fund purchases an option, it may lose the total premium paid for it if the price of the underlying security or other assets decreased, remained the same or failed to increase to a level at or beyond the exercise price (in the case of a call option) or increased, remained the same or failed to decrease to a level at or below the exercise price (in the case of a put option). If a put or call option purchased by the fund were permitted to expire without being sold or exercised, its premium would represent a loss to the fund. To the extent that the fund writes or sells an option, in particular a naked option, if the decline or increase in the underlying asset is significantly below or above the exercise price of the written option, the fund could experience a substantial loss.

Risks associated with the use of derivatives are magnified to the extent that an increased portion of the fund’s assets is committed to derivatives in general or is invested in just one or a few types of derivatives.

Leverage risk. The use of traditional borrowing (including to meet redemption requests), reverse repurchase agreements and derivatives creates leverage (i.e., a fund’s investment exposures exceed its net asset value). Leverage increases a fund’s losses when the value of its investments (including derivatives) declines. Because many derivatives have a leverage component (i.e., a notional value in excess of the assets needed to establish or maintain the derivative position), adverse changes in the value or level of the underlying asset, rate, or index may result in a loss substantially greater than the amount invested in the derivative itself. In the case of swaps, the risk of loss generally is related to a notional principal amount, even if the parties have not made any initial investment. Some derivatives, similar to short sales, have the potential for unlimited loss, regardless of the size of the initial investment. Similarly, the fund’s portfolio will be leveraged and can incur losses if the value of the fund’s assets declines between the time a redemption request is received or deemed to be received by the fund (which in some cases may be the business day prior to actual receipt of the transaction activity by the fund) and the time at which the fund liquidates assets to meet redemption requests. In the case of redemptions representing a significant portion of the fund’s portfolio, the leverage effects described above can be significant and could expose a fund and non-redeeming shareholders to material losses.

The fund may manage some of its derivative positions by offsetting derivative positions against one another or against other assets. To the extent offsetting positions do not behave in relation to one another as expected, the fund may perform as if it were leveraged.

Some funds are permitted to purchase securities on margin or to sell securities short, either of which creates leverage. To the extent the market prices of securities pledged to counterparties to secure the fund’s margin account or short sale decline, the fund may be required to deposit additional funds with the counterparty to avoid having the pledged securities liquidated to compensate for the decline.

Risks relating to inflation-indexed securities. The value of inflation-indexed fixed income securities generally fluctuates in response to changes in real interest rates, which are in turn tied to the relationship between nominal interest rates and the rate of inflation. Therefore, if inflation were to rise at a faster rate than nominal interest rates, real interest rates might decline, leading to an increase in value of inflation-indexed securities. In contrast, if nominal interest rates increase at a faster rate than inflation, real interest rates might rise, leading to a decrease in value of inflation-indexed securities. The principal value of inflation-indexed securities declines in periods of deflation, and holders of such securities may experience a loss. Although the holders of U.S. TIPS receive no less than the par value of the security at maturity, if the fund purchases U.S. TIPS in the secondary

market whose principal values have been adjusted upward due to inflation since issuance, it may experience a loss if there is a subsequent period of deflation. If inflation is lower than expected during the period the fund holds an inflation-indexed security, the fund may earn less on the security than on a conventional bond.

Any increase in principal value caused by an increase in the index the inflation-indexed securities are tied to is taxable in the year the increase occurs, even though the fund will not receive cash representing the increase at that time. As a result, the fund could be required at times to liquidate other investments, including when it is not advantageous to do so, in order to satisfy the distribution requirements applicable to regulated investment companies under the Internal Revenue Code of 1986, as amended (the “Code”). See “Taxes” in the SAI.

If real interest rates rise (i.e., if interest rates rise for reasons other than inflation, for example, due to changes in currency exchange rates), the value of inflation-indexed securities held by the fund will decline. Moreover, because the principal amount of inflation-indexed securities would be adjusted downward during a period of deflation, the fund will be subject to deflation risk with respect to its investments in these securities. Inflation-indexed securities are tied to indices that are calculated based on rates of inflation for prior periods. There can be no assurance that such indices will accurately measure the actual rate of inflation in the prices of goods and services.

Portfolio turnover risk. Active and frequent trading may increase a shareholder’s tax liability and the fund’s transaction costs, which could detract from fund performance.

Illiquidity risk. Illiquidity risk exists when particular investments are impossible or difficult to sell and some assets that the fund wants to invest in may be impossible or difficult to purchase. Although most of the fund’s investments must be liquid at the time of investment, investments may become illiquid after purchase by the fund, particularly during periods of market turmoil or due to adverse changes in the conditions of a particular issuer. Markets may become illiquid when, for instance, there are few, if any, interested buyers or sellers or when dealers are unwilling or unable to make a market for certain securities. As a general matter, dealers recently have been less willing to make markets for fixed income securities. Recent federal banking regulations may also cause certain dealers to reduce their inventories of certain securities, which may further decrease the ability to buy or sell such securities. When the fund holds illiquid investments, the portfolio may be harder to value, especially in changing markets, and if the fund is forced to sell these investments to meet redemption requests or for other cash needs, the fund may suffer a loss. The fund may experience heavy redemptions that could cause the fund to liquidate its assets at inopportune times or at a loss or depressed value, which could cause the value of your investment to decline. In addition, when there is illiquidity in the market for certain investments, the fund, due to limitations on illiquid investments, may be unable to achieve its desired level of exposure to a certain sector, industry or issuer. The liquidity of certain assets, particularly of privately-issued and non-investment grade mortgage-backed securities, asset-backed securities and collateralized debt obligations, may be difficult to ascertain and may change over time. Transactions in less liquid or illiquid securities may entail transaction costs that are higher than those for transactions in liquid securities. Further, such securities, once sold, may not settle for an extended period (for example, several weeks or even longer). The fund will not receive its sales proceeds until that time, which may constrain the fund’s ability to meet its obligations (including obligations to redeeming shareholders).

Valuation risk. Many factors may influence the price at which the fund could sell any particular portfolio investment. The sales price may well differ—higher or lower—from the fund’s last valuation, and such differences could be significant, particularly for illiquid securities and securities that trade in relatively thin markets and/or markets that experience extreme volatility. If market conditions make it difficult to value some investments, the fund may value these investments using more subjective methods, such as fair value methodologies. Investors who purchase or redeem fund shares on days when the fund is holding fair-valued securities may receive fewer or more shares, or lower or higher redemption proceeds, than they would have received if the fund had not fair-valued securities or had used a different valuation methodology. The value of non-U.S. securities, certain fixed income securities and currencies, as applicable, may be materially affected by events after the close of the markets in which they are traded, but before the fund determines its net asset value. The fund’s ability to value its investments may also be impacted by technological issues and/or errors by pricing services or other third party service providers. The valuation of the fund’s investments involves subjective judgment.

Investing in ETFs risk. Investing in securities issued by ETFs involves risks similar to those of investing directly in the securities and other assets held by the ETF. Unlike shares of typical mutual funds, shares of ETFs are generally traded on an exchange throughout a trading day and bought and sold based on market values and not at net asset value. For this reason, shares could trade at either a premium or discount to net asset value, which may be substantial during periods of market stress. The trading price of an index-based ETF is expected to (but may not) closely track the net asset value of the ETF, and the fund will generally gain or lose value consistent with the performance of the ETF’s portfolio securities. The fund will pay brokerage commissions in connection with the purchase and sale of shares of ETFs. In addition, the fund will indirectly bear its pro rata share of the fees and expenses incurred by an ETF in which it invests, including advisory fees. These expenses are in addition to the advisory and other expenses that the fund bears directly in connection with its own operations. An index-based ETF may not replicate exactly the performance of the benchmark index it seeks to track for a number of reasons, including transaction costs incurred by the ETF, the temporary unavailability of certain index securities in the secondary market or discrepancies between the ETF and the index with respect to the weighting of securities or the number of securities held. Investments in ETFs are subject to the risk that the listing exchange may halt trading of an ETF’s shares, in which case the fund would be unable to sell its ETF shares unless and until trading is resumed.

ETFs that invest in commodities may be, or may become, subject to regulatory trading limits that could hurt the value of their securities. Some commodity ETFs also invest in commodity futures, which can lose money even when commodity prices are rising.

Cash management and defensive investing risk. The value of the investments held by the fund for cash management or defensive investing purposes can fluctuate. Like other fixed income securities, they are subject to risk, including market, interest rate and credit risk. If the fund holds cash uninvested, the cash will be subject to the credit risk of the depository institution holding the cash and the fund will not earn income on the cash. If a significant amount of the fund’s assets is used for cash management or defensive investing purposes, the fund will be less likely to achieve its investment objective. Defensive investing may not work as intended and the value of an investment in the fund may still decline.

Risk of increase in expenses. Your actual costs of investing in the fund may be higher than the expenses shown in “Annual fund operating expenses” for a variety of reasons. For example, expenses may be higher if the fund’s average net assets decrease, as a result of redemptions or otherwise, or if a fee limitation is changed or terminated. Net assets are more likely to decrease and fund expense ratios are more likely to increase when markets are volatile.

Redemptions by affiliated funds and by other significant investors. The fund may be an investment option for other Legg Mason, Inc. (“Legg Mason”) sponsored mutual funds and ETFs that are managed as “funds of funds,” unaffiliated mutual funds and ETFs and other investors with substantial investments in the fund. As a result, from time to time, the fund may experience relatively large redemptions and could be required to liquidate its assets at inopportune times or at a loss or depressed value, which could cause the value of your investment to decline.

Redemption risk. The fund may experience periods of heavy redemptions, particularly during periods of declining or illiquid markets, that could cause the fund to liquidate its assets at inopportune times or unfavorable prices or increase or accelerate taxable gains or transaction costs and may negatively affect the fund’s net asset value, performance, or ability to satisfy redemptions in a timely manner which could cause the value of your investment to decline. Redemption risk is greater to the extent that the fund has investors with large shareholdings, short investment horizons, unpredictable cash flow needs or where one decision maker has control of fund shares owned by separate fund shareholders, including clients or affiliates of the fund’s manager. In addition, redemption risk is heightened during periods of overall market turmoil. The redemption by one or more large shareholders of their holdings in the fund could hurt performance and/or cause the remaining shareholders in the fund to lose money.

Operational risk. Your ability to transact with the fund or the valuation of your investment may be negatively impacted because of the operational risks arising from factors such as processing errors and human errors, inadequate or failed internal or external processes, failures in systems and technology, changes in personnel, and errors caused by third party service providers or trading counterparties. It is not possible to identify all of the operational risks that may affect the fund or to develop processes and controls that completely eliminate or mitigate the occurrence of such failures. The fund and its shareholders could be negatively impacted as a result.

Please note that there are other factors that could adversely affect your investment and that could prevent the fund from achieving its investment objective. More information about risks appears in the SAI. Before investing, you should carefully consider the risks that you will assume.

A description of the fund’s policies and procedures with respect to the disclosure of its portfolio holdings is available in the SAI. The fund posts its complete portfolio holdings at www.leggmason.com/mutualfunds (click on the name of the fund) on a quarterly basis. The fund intends to post its complete portfolio holdings 14 calendar days following the quarter-end. The fund intends to post partial information concerning the fund’s portfolio holdings (such as top 10 holdings or sector breakdowns, for example) on the Legg Mason funds’ website on a monthly basis. The fund intends to post this partial information 10 business days following each month-end. Such information will remain available until the next month’s or quarter’s holdings are posted.

Legg Mason Partners Fund Advisor, LLC (“LMPFA” or the “manager”) is the fund’s investment manager. LMPFA, with offices at 620 Eighth Avenue, New York, New York 10018, also serves as the investment manager of other Legg Mason-sponsored funds. LMPFA provides administrative and certain oversight services to the fund. As of December 31, 2019, LMPFA’s total assets under management were approximately $202.1 billion.

Brandywine Global Investment Management, LLC (“Brandywine Global” or the “subadviser”) provides the day-to-day portfolio management of the fund. Brandywine Global has offices at 1735 Market Street, 18th Floor, Philadelphia, Pennsylvania 19103. Brandywine Global acts as adviser or subadviser to individuals, public funds, corporations, pension and profit sharing plans, Taft-Hartley Plans, endowments and foundations, as well as to investment company portfolios. As of December 31, 2019, Brandywine Global’s total assets under management were approximately $74.0 billion.

LMPFA and Brandywine Global are wholly-owned subsidiaries of Legg Mason, Inc. (“Legg Mason”). Legg Mason, whose principal executive offices are at 100 International Drive, Baltimore, Maryland 21202, is a global asset management company. As of December 31, 2019, Legg Mason’s asset management operations had aggregate assets under management of approximately $803.5 billion.

On February 18, 2020, Franklin Resources and Legg Mason announced that they have entered into a definitive agreement for Franklin Resources to acquire Legg Mason in an all-cash transaction. As part of this transaction, LMPFA and the subadviser(s), each currently a wholly owned subsidiary of Legg Mason, would become a wholly owned subsidiary of Franklin Resources. The transaction is subject to approval by Legg Mason’s shareholders and customary closing conditions, including receipt of applicable regulatory approvals. Subject to such approvals and the satisfaction of the other conditions, the transaction is expected to be consummated in the latter part of 2020. Under the 1940 Act, consummation of the transaction will result in the automatic termination of the management and subadvisory agreements. Therefore, the fund’s Board of Trustees has approved new management and subadvisory agreements that will be presented to the shareholders of the fund for their approval. Additional informational materials will be mailed to shareholders.

Primary responsibility for the day-to-day management of the fund lies with the following portfolio managers.

The SAI provides information about the compensation of the portfolio managers, other accounts managed by the portfolio managers and any fund shares held by the portfolio managers.

The fund pays a management fee at an annual rate of 0.55% of its average daily net assets.

For the fiscal year ended December 31, 2019, the fund did not pay LMPFA an effective management fee for management services.

A discussion regarding the basis for the Board’s approval of the fund’s management agreement and subadvisory agreement is available in the fund’s Annual Report for the period ended December 31, 2019.

The manager has agreed to waive fees and/or reimburse operating expenses (other than interest, brokerage commissions, dividend and interest expense on securities sold short, taxes, extraordinary expenses and acquired fund fees and expenses) so that the ratio of total annual fund operating expenses will not exceed 1.10% for Class A shares, 1.30% for Class A2 shares, 1.85% for Class C shares, 1.35% for Class R shares, 0.75% for Class I shares and 0.65% for Class IS shares, subject to recapture as described below. In addition, the ratio of total annual fund operating expenses for Class IS shares will not exceed the ratio of total annual fund operating expenses for Class I shares, subject to recapture as described below. These arrangements are expected to continue until December 31, 2021, may be terminated prior to that date by agreement of the manager and the Board, and may be terminated at any time after that date by the manager. These arrangements, however, may be modified by the manager to decrease total annual fund operating expenses at any time. The manager is also permitted to recapture amounts waived and/or reimbursed to a class within three years after the fiscal year in which the manager earned the fee or incurred the expense if the class’ total annual fund operating expenses have fallen to a level below the limit described above. In no case will the manager recapture any amount that would result, on any particular business day of the fund, in the class’ total annual fund operating expenses exceeding the applicable limits described above or any other lower limit then in effect.

The fund enters into contractual arrangements with various parties, including, among others, the fund’s investment manager and the subadviser, who provide services to the fund. Shareholders are not parties to, or intended (or “third-party”) beneficiaries of, those contractual arrangements.

This Prospectus and the SAI provide information concerning the fund that you should consider in determining whether to purchase shares of the fund. The fund may make changes to this information from time to time. Neither this Prospectus nor the SAI is intended to give rise to any contract rights or other rights in any shareholder, other than rights conferred by federal or state securities laws.

Legg Mason Investor Services, LLC (“LMIS”), a wholly-owned broker/dealer subsidiary of Legg Mason, serves as the fund’s sole and exclusive distributor.

The fund has adopted a shareholder services and distribution plan pursuant to Rule 12b-1 under the Investment Company Act of 1940, as amended. Under the plan, the fund pays distribution and/or service fees based on an annualized percentage of average daily net assets of up to 0.25% for Class A shares; up to 0.25% for Class A2 shares; up to 1.00% for Class C shares and up to 0.50% for Class R shares. Payments by the fund under its plan go to LMIS, financial intermediaries and other parties that provide services in connection with or are otherwise involved in the distribution of its shares or administration of plans or programs that use its shares as their funding medium, and to reimburse certain other expenses and payments. From time to time, LMIS and/or financial intermediaries may agree to a reduction or waiver of these fees. These fees are an ongoing expense and, over time, will increase the cost of your investment and may cost you more than other types of sales charges. Class I shares and Class IS shares are not subject to distribution and/or service fees under the plan.

In addition to payments made to intermediaries under the fund’s shareholder services and distribution plan and other payments made by the fund for shareholder services and/or recordkeeping, the distributor, the manager and/or their affiliates make payments for distribution, shareholder servicing, marketing and promotional activities and related expenses out of their profits and other available sources, including profits from their relationships with the fund. These payments are not reflected as additional expenses in the fee table contained in this Prospectus. The recipients of these payments may include the fund’s distributor and affiliates of the manager, as well as Service Agents through which investors may purchase shares of the fund, including your Service Agent. The total amount of these payments is substantial, may be substantial to any given recipient and may exceed the costs and expenses incurred by the recipient for any fund-related marketing or shareholder servicing activities. The payments described in this paragraph are often referred to as “revenue sharing payments.” Revenue sharing arrangements are separately negotiated between the distributor, the manager and/or their affiliates, and the recipients of these payments.

Revenue sharing payments create an incentive for an intermediary or its employees or associated persons to recommend or sell shares of the fund to you. Contact your Service Agent for details about revenue sharing payments it receives or may receive. Additional information about revenue sharing payments is available in the SAI. Revenue sharing payments, as well as payments by the fund under the shareholder services and distribution plan or for recordkeeping and/or shareholder services, also benefit the manager, the distributor and their affiliates to the extent the payments result in more assets being invested in the fund on which fees are being charged.

Individual investors can generally invest in Class A, Class A2 and Class C shares. Class C shares are not available for purchase through accounts where LMIS is the broker-dealer of record (“LMIS Accounts”). Individual investors who invest directly with the fund and who meet the $1,000,000 minimum initial investment requirement may purchase Class I shares. Retirement Plans and Institutional Investors and Clients of Eligible Financial Intermediaries should refer to “Retirement and Institutional Investors — eligible investors” below for a description of the classes available to them.

Investors not purchasing directly from the fund may purchase shares through a Service Agent. Please note that if you are purchasing shares through a Service Agent, your Service Agent may not offer all classes of shares. Service Agents making fund shares available to their clients determine which share class(es) to make available. Your Service Agent may receive different compensation for selling one class of shares than for selling another class, which may depend on, among other things, the type of investor account and the practices adopted by your Service Agent. Certain Service Agents may impose their own investment fees and practices for purchasing and selling fund shares, which are not described in this Prospectus or the SAI, and which will depend on the policies, procedures and trading platforms of the Service Agent. Consult a representative of your Service Agent about the availability of fund shares and the Service Agent’s practices and other information.

Individual investors investing through a Service Agent may be eligible to invest in Class I or Class IS shares, if such Service Agent is acting solely as an agent on behalf of its customers pursuant to an agreement with LMIS and such investor’s shares are held in an omnibus account on the books of the fund. Please contact your Service Agent for more information.

Please note that the fund does not charge any front-end load, deferred sales charge or other asset-based fee for sales or distribution of Class I shares and Class IS shares. However, if you purchase Class I or Class IS shares through a Service Agent acting solely as an agent on behalf of its customers pursuant to an agreement with LMIS, that Service Agent may charge you a commission in an amount determined and separately disclosed to you by the Service Agent.

Because the fund is not a party to any commission arrangement between you and your Service Agent, any purchases and redemptions of Class I or Class IS shares will be made by the fund at the applicable net asset value (before imposition of the sales commission). Any commissions charged by a Service Agent are not reflected in the fees and expenses listed in the fee table or expense example in this Prospectus nor are they reflected in the performance in the bar chart and table in this Prospectus because these commissions are not charged by the fund.

Each class has different sales charges and expenses, allowing you to choose a class that may be appropriate for you.

When choosing between Class A, Class A2 or Class C shares, you should be aware that, generally speaking, the larger the size of your investment and the longer your investment horizon, the more likely it will be that Class C shares will not be as advantageous as Class A or Class A2 shares. The annual distribution and/or service fees on Class C shares may cost you more over the longer term than the front-end sales charge and service fees you would have paid for larger purchases of Class A or Class A2 shares. If you are eligible to purchase Class I shares, you should be aware that Class I shares are not subject to a front-end sales charge or distribution or service fees and generally have lower annual expenses than Class A, Class A2 or Class C shares.

Each class of shares, except Class IS shares, is authorized to pay fees for recordkeeping services, account servicing, networking, or similar services to Service Agents. As a result, operating expenses of classes that incur new or additional recordkeeping fees may increase over time.

Your Service Agent may provide shareholder services that differ from the services provided by other Service Agents. Services provided by your Service Agent may vary by class. You should ask your Service Agent to explain the shareholder services it provides for each class and the compensation it receives in connection with each class.

Your Service Agent may not offer all classes of shares. You should contact your Service Agent for further information.

More information about the fund’s classes of shares is available through the Legg Mason funds’ website. You’ll find detailed information, free of charge and in a clear and prominent format, about sales charges and ways you can qualify for reduced or waived sales charges, including:

To visit the website, go to www.leggmason.com/mutualfunds, and click on the name of the fund. On the selected fund’s page, scroll to the bottom of the page and click on the disclosure labeled “Click here for Legg Mason Funds sales charge and breakpoint information.”

The following table compares key features of the fund’s classes. You should also review the fee table and example at the front of this Prospectus carefully before choosing your share class. Your Service Agent can help you choose a class that may be appropriate for you. Please contact your Service Agent regarding the availability of Class R or Class IS shares or, if you plan to purchase shares through the fund, contact the fund. You may be required to provide appropriate documentation confirming your eligibility to invest in these share classes. Your Service Agent may receive different compensation depending upon which class you choose. For more information please see the appendix located at the end of this Prospectus titled “Appendix: Waivers and Discounts Available from Certain Service Agents.”

You buy Class A or Class A2 shares at the offering price, which is the net asset value plus a sales charge. You pay a lower rate as the size of your investment increases to certain levels called breakpoints. You do not pay a sales charge on the fund’s distributions or dividends that you reinvest in additional Class A or Class A2 shares.

The table below shows the rate of sales charge you pay, depending on the amount you purchase. It also shows the amount of Service Agent compensation that will be paid out of the sales charge if you buy shares from a Service Agent. For Class A or Class A2 shares sold by the distributor, the distributor will receive the sales charge imposed on purchases of Class A or Class A2 shares (or any contingent deferred sales charge paid on redemptions) and will retain the full amount of such sales charge. Service Agents will receive a distribution and/or service fee payable on Class A or Class A2 shares at an annual rate of up to 0.25% of the average daily net assets represented by the Class A or Class A2 shares serviced by them.

You do not pay an initial sales charge when you buy $1,000,000 or more of Class A or Class A2 shares. However, if you redeem these Class A or Class A2 shares within 18 months of purchase, you will pay a contingent deferred sales charge of 1.00%.

There are several ways you can combine multiple purchases of shares of funds or units of a Section 529 college savings plan sold by the distributor (a “Section 529 plan”) to take advantage of the breakpoints in the Class A or Class A2 sales charge schedule. In order to take advantage of reductions in sales charges that may be available to you when you purchase fund shares, you must inform your Service Agent or the fund if you believe you are eligible for a letter of intent or a right of accumulation. Whether you purchased shares of funds and/or units of a Section 529 Plan through one or more Service Agents, directly from the fund or through a combination of the foregoing, it is your responsibility to inform your Service Agent or the fund if you own shares of other funds or units of a Section 529 plan that you believe are eligible to be aggregated with your purchases. If you do not do so, you may not receive all sales charge reductions for which you are eligible. Account statements may be necessary in order to verify your eligibility for a reduced sales charge.

Accumulation Privilege – allows you to combine the current value of shares of the fund with shares of other funds or units of a Section 529 plan sold by the distributor that are owned by:

with the dollar amount of your next purchase of Class A or Class A2 shares for purposes of calculating the initial sales charges.

If you hold fund shares or units of a Section 529 plan in accounts at two or more Service Agents, please contact your Service Agents to determine whether your shares or units may be combined. Shares of money market funds sold by the distributor may be combined for purposes of the accumulation privilege. Please contact your Service Agent or the fund for additional information.

Certain trustees and other fiduciaries may be entitled to combine accounts in determining their sales charge.

Letter of Intent – allows you to purchase Class A or Class A2 shares of funds or units of a Section 529 plan sold by the distributor over a 13-month period and pay the same sales charge, if any, as if all shares or units had been purchased at once. At the time you enter into the letter of intent, you select your asset goal amount from among the levels of investment specified under “Amount of investment” in the chart above. Generally, purchases of shares of funds or units of a Section 529 plan sold by the distributor that are purchased during the 13-month period by:

are eligible for inclusion under the letter of intent, based on the public offering price at the time of the purchase and any capital appreciation on those shares or units. In addition, you can include the current value of any eligible holdings toward your asset goal amount.

Shares of money market funds sold by the distributor may be combined for purposes of the letter of intent. Please contact your Service Agent for additional information.

If you do not meet your asset goal amount, shares in the amount of any sales charges due, based on the amount of your actual purchases, will be redeemed from your account.

Class A and Class A2 initial sales charges are waived for certain types of investors, including:

If you qualify for a waiver of the Class A or Class A2 initial sales charge, you must notify your Service Agent or the fund at 1-877-721-1926 at the time of purchase and provide sufficient information at the time of purchase to permit verification that the purchase qualifies for the initial sales charge waiver.

Different Service Agents may impose different sales loads or offer different ways to reduce sales loads. These variations are described at the end of this Prospectus in the appendix titled “Appendix: Waivers and Discounts Available from Certain Service Agents.”

For additional information regarding waivers of Class A and Class A2 initial sales charges, contact your Service Agent or the fund, consult the SAI or visit the Legg Mason funds’ website, www.leggmason.com/mutualfunds, and click on the name of the fund. On the selected fund’s page, scroll to the bottom of the page and click on the disclosure labeled “Click here for Legg Mason Funds sales charge and breakpoint information.”

You buy Class C shares at net asset value with no initial sales charge. However, if you redeem your Class C shares within one year of purchase, you will pay a contingent deferred sales charge of 1.00%. Class C shares are not available for purchase through LMIS Accounts.

LMIS generally will pay Service Agents selling Class C shares a commission of up to 1.00% of the purchase price of the Class C shares they sell. LMIS will retain the contingent deferred sales charges and an annual distribution and/or service fee of up to 1.00% of the average daily net assets represented by the Class C shares serviced by these Service Agents until the thirteenth month after purchase. Starting in the thirteenth month after purchase, these Service Agents will receive an annual distribution and/or service fee of up to 1.00% of the average daily net assets represented by the Class C shares serviced by them.

Effective April 15, 2019, except as noted below, Class C shares automatically convert to Class A shares after the shares have been held for 10 years from the purchase date; the shares will be converted on the next monthly conversion processing date after the 10 year anniversary of purchase (generally, on the fifteenth of the month, or the next business day if the fifteenth is not a business day). The initial Class C share conversion occurred on April 15, 2019, when Class C shares purchased on or prior to April 15, 2009 converted to Class A shares, except as noted below. It is the responsibility of your Service Agent and not the fund or LMIS to ensure that you are credited with the proper holding period. If your Service Agent does not have records verifying that your shares have been held for at least 10 years, your Service Agent may not convert your Class C shares to Class A shares. Group retirement plans held in an omnibus recordkeeping platform through a Service Agent that does not track participant-level share lot aging may not convert Class C shares to Class A shares. Customers of certain Service Agents may be subject to different terms or conditions, as set by their Service Agent, in connection with such conversions. Please refer to the appendix titled “Appendix: Waivers and Discounts Available from Certain Service Agents” on page A-1 of this Prospectus or contact your Service Agent for more information.

For Class C shares that have been acquired through an exchange from another fund sold by LMIS, the purchase date is calculated from the date the shares were originally acquired in the other fund. When Class C shares that a shareholder acquired through a purchase or exchange convert, any other Class C shares that the shareholder acquired as reinvested dividends and distributions related to those shares also will convert into Class A shares on a pro rata basis.

All conversions from Class C shares to Class A shares will be based on the per share net asset value without the imposition of any sales load, fee or other charge. The conversion from Class C shares to Class A shares is not considered a taxable event for federal income tax purposes.

You buy Class R shares at net asset value with no initial sales charge and no contingent deferred sales charge when redeemed.

Service Agents receive an annual distribution and/or service fee of up to 0.50% of the average daily net assets represented by the Class R shares serviced by them.

You buy Class I shares and Class IS shares at net asset value with no initial sales charge and no contingent deferred sales charge when redeemed. Class I shares and Class IS shares are not subject to any distribution and/or service fees. However, if you purchase Class I shares or Class IS shares through a Service Agent acting solely as an agent on behalf of its customers pursuant to an agreement with LMIS, the Service Agent may charge you a commission in an amount determined and separately disclosed to you by the Service Agent. In order to purchase Class I shares or Class IS shares, individual investors must meet the eligibility criteria to invest in such shares or purchase such shares through a Service Agent who holds shares through an omnibus account held on the books of the fund.

The contingent deferred sales charge is based on the net asset value at the time of purchase or redemption, whichever is less, and therefore you do not pay a sales charge on amounts representing appreciation or depreciation.

Each time you place a request to redeem shares, the fund will first redeem any shares in your account that are not subject to a contingent deferred sales charge and then redeem the shares in your account that have been held the longest.

If you redeem shares of a fund sold by the distributor and pay a contingent deferred sales charge, you may, under certain circumstances, reinvest all or part of the redemption proceeds within 60 days in any other fund sold by the distributor and receive pro rata credit for any contingent deferred sales charge imposed on the prior redemption. Please contact your Service Agent or the fund for additional information.

The distributor receives contingent deferred sales charges as partial compensation for its expenses in selling shares, including the payment of compensation to your Service Agent.

The contingent deferred sales charge for each share class will generally be waived:

To have your contingent deferred sales charge waived, you or your Service Agent must let the fund know at the time you redeem shares that you qualify for such a waiver.

Different Service Agents may offer different contingent deferred sales charge waivers. These variations are described at the end of this Prospectus in the appendix titled “Appendix: Waivers and Discounts Available from Certain Service Agents.”

For additional information regarding waivers of contingent deferred sales charges, contact your Service Agent or the fund, consult the SAI or visit the Legg Mason funds’ website, www.leggmason.com/mutualfunds and click on the name of the fund. On the selected fund’s page, scroll to the bottom of the page and click on the disclosure labeled “Click here for Legg Mason Funds sales charge and breakpoint information.”

“Retirement Plans” include 401(k) plans, 457 plans, employer-sponsored 403(b) plans, profit-sharing plans, non-qualified deferred compensation plans, employer sponsored benefit plans (including health savings accounts), other similar employer-sponsored retirement and benefit plans, and individual retirement accounts that are administered on the same IRA recordkeeping platform and that invest in the fund through a single omnibus account pursuant to a special contractual arrangement with the fund or the distributor. Retirement Plans do not include individual retirement vehicles, such as traditional and Roth IRAs (absent an exception that is explicitly described in this Prospectus), Coverdell education savings accounts, individual 403(b)(7) custodial accounts, Keogh plans, SEPs, SARSEPs, SIMPLE IRAs or similar accounts.

Retirement Plans with omnibus accounts held on the books of the fund can generally invest in Class A, Class A2, Class C, Class R, Class I and Class IS shares.

Investors who rollover fund shares from a Retirement Plan into an individual retirement account administered on the same retirement plan platform may hold, purchase and exchange shares of the fund to the same extent as the applicable Retirement Plan.

Although Retirement Plans with omnibus accounts held on the books of the fund are not subject to minimum initial investment requirements for any of these share classes, certain investment minimums may be imposed by a Service Agent. The distributor may impose certain additional requirements. Please contact your Service Agent for more information.

“Other Retirement Plans” include Retirement Plans investing through brokerage accounts and also include certain Retirement Plans with direct relationships to the fund that are neither Institutional Investors nor investing through omnibus accounts. Other Retirement Plans and individual retirement vehicles, such as IRAs, are treated like individual investors for purposes of determining sales charges and any applicable sales charge reductions or waivers.

“Other Retirement Plans” do not include arrangements whereby an investor would rollover fund shares from a Retirement Plan into an individual retirement account administered on the same retirement plan platform. Such arrangements are deemed to be “Retirement Plans” and are subject to the rights and privileges described under “Retirement and Institutional Investors — eligible investors — Retirement Plans.”

Other Retirement Plan investors and individual retirement vehicles can generally invest in Class A, Class A2, Class C and Class I shares.

“Clients of Eligible Financial Intermediaries” are investors who invest in the fund through Service Agents that (i) charge such investors an ongoing fee for advisory, investment, consulting or similar services, or (ii) have entered into an agreement with the distributor to offer Class A, Class A2, Class R, Class I or Class IS shares through a no-load network or platform (“Eligible Investment Programs”). Such investors may include investors who invest in the fund through the program of a Service Agent where the investor typically invests $10 million or more in assets under management in accounts with the Service Agent (“Management Accounts”). Such investors may also include pension and profit sharing plans, other employee benefit trusts, endowments, foundations and corporations. Eligible Investment Programs may also include college savings vehicles such as Section 529 plans and direct retail investment platforms through mutual fund “supermarkets,” where the sponsor links its client’s account (including IRA accounts on such platforms) to a master account in the sponsor’s name. The Service Agent may impose separate investment minimums.

Clients of Eligible Financial Intermediaries may generally invest in Class A, Class A2, Class R, Class I or Class IS shares. Class I and Class IS shares are available for exchange from Class A, Class A2 or Class C shares of the fund by participants in Eligible Investment Programs.

“Institutional Investors” may include corporations, banks, trust companies, insurance companies, investment companies, foundations, endowments, defined benefit plans and other similar entities. The distributor or the Service Agent may impose additional eligibility requirements or criteria to determine if an investor, including the types of investors listed above, qualifies as an Institutional Investor.

Institutional Investors may invest in Class I or Class IS shares if they meet the $1,000,000 minimum initial investment requirement. Institutional Investors may also invest in Class A, Class A2 and Class C shares, which have different investment minimums, fees and expenses.

Retirement Plans may buy Class A shares. Under certain programs for current and prospective Retirement Plan investors sponsored by Service Agents, the initial sales charge and contingent deferred sales charge for Class A shares are waived where:

LMIS does not pay Service Agents selling Class A shares to Retirement Plans with a direct omnibus relationship with the fund a commission on the purchase price of Class A shares sold by them. However, for certain Retirement Plans that are permitted to purchase shares at net asset value, LMIS

may pay Service Agents commissions of up to 0.75% of the purchase price of the Class A shares that are purchased with regular ongoing plan contributions. Please contact your Service Agent for more information.

Retirement Plans may buy Class A2 shares. Under certain programs for current and prospective Retirement Plan investors sponsored by Service Agents, the initial sales charge and contingent deferred sales charge for Class A2 shares are waived where:

LMIS does not pay Service Agents selling Class A2 shares to Retirement Plans a commission on the purchase price of Class A2 shares sold by the Service Agents. However, for certain Retirement Plans that are permitted to purchase shares at net asset value, LMIS may pay Service Agents commissions of up to 0.75% of the purchase price of the Class A2 shares that are purchased with regular ongoing plan contributions. Please contact your Service Agent for more information.

Retirement Plans with omnibus accounts held on the books of the fund may buy Class C shares at net asset value without paying a contingent deferred sales charge. LMIS does not pay Service Agents selling Class C shares to Retirement Plans with omnibus accounts held on the books of the fund a commission on the purchase price of Class C shares sold by them. Instead, immediately after purchase, LMIS may pay these Service Agents an annual distribution and/or service fee of up to 1.00% of the average daily net assets represented by the Class C shares serviced by them.

Certain Retirement Plan programs with exchange features in effect prior to November 20, 2006, as approved by LMIS, remain eligible for exchange from Class C shares to Class A shares in accordance with the program terms. Please see the SAI for more details.

Class R shares are offered only to Retirement Plans with omnibus accounts held on the books of the fund (either at the plan level or at the level of the Service Agent), to Clients of Eligible Financial Intermediaries and through Eligible Investment Programs.

Investors who qualify as Clients of Eligible Financial Intermediaries or who participate in Eligible Investment Programs made available through their Service Agents (such as investors in fee-based advisory or mutual fund “wrap” programs) are eligible to purchase, directly or via exchange, Class I shares, among other share classes. In such cases your ability to hold Class I shares may be premised on your continuing participation in a fee-based advisory or mutual fund wrap program.

Your Service Agent may reserve the right to redeem your Class I shares or exchange them for Class A or Class A2 shares of the same fund, as applicable, if you terminate your fee-based advisory or mutual fund wrap program and are no longer eligible for Class I shares. You may be subject to an initial sales charge in connection with such exchange, and you will be subject to the annual distribution and/or service fee applicable to Class A and Class A2 shares. Any redemption may generate a taxable gain or loss and significantly change the asset allocation of your account. Please contact your Service Agent for more information.

Certain waivers of these requirements for individuals associated with the fund, Legg Mason or its affiliates are discussed in the SAI.

Class IS shares may be purchased by accounts which are not subject to the payment of recordkeeping, account servicing, networking or similar fees by the fund to any intermediary. Class IS shares may be purchased by:

Investors who qualify as Clients of Eligible Financial Intermediaries or who participate in Eligible Investment Programs made available through their Service Agents (such as investors in fee-based advisory or mutual fund “wrap” programs) are eligible to purchase, directly or via exchange, Class IS shares, among other share classes. In such cases your ability to hold Class IS shares may be premised on your continuing participation in a fee-based advisory or mutual fund wrap program.

Your Service Agent may reserve the right to redeem your Class IS shares or exchange them for Class A or Class A2 shares of the same fund, as applicable, if you terminate your fee-based advisory or mutual fund wrap program and are no longer eligible for Class IS shares. You may be subject to an initial sales charge in connection with such exchange and you will be subject to the annual distribution and/or service fee applicable to Class A and Class A2 shares. Any redemption may generate a taxable gain or loss and significantly change the asset allocation of your account.

Plan sponsors, plan fiduciaries and other Service Agents may choose to impose qualification requirements that differ from the fund’s share class eligibility standards. In certain cases this could result in the selection of a share class with higher distribution and/or service fees than otherwise would have been charged. The fund is not responsible for, and has no control over, the decision of any plan sponsor, plan fiduciary or Service Agent to impose such differing requirements. Please consult with your plan sponsor, plan fiduciary or Service Agent for more information about available share classes.

Your Service Agent may not offer all share classes. Please contact your Service Agent for additional details.

If you pay with a check or ACH transfer that does not clear or if your payment is not received in a timely manner, your purchase may be cancelled and you may be liable for any loss to the fund. Please note that the fund will not accept cash, money orders, third-party checks, starter checks, internet

checks, cashier checks if not received from a financial institution in connection with a transfer of assets, credit card convenience checks and traveler’s checks for purchase of fund shares. The fund and its agents have the right to reject or cancel any purchase due to nonpayment.

Changes in registration or certain account options for accounts held directly with the fund must be made in writing. Medallion signature guarantees may be required. (See “Other things to know about transactions—Medallion signature guarantees” below.) All correspondence must include the account number and must be sent to one of the following addresses:

When you buy, exchange or redeem shares, your request must be in good order. This means you have provided the following information, without which your request may not be processed:

In certain circumstances, such as during periods of market volatility, severe weather and emergencies, shareholders may experience difficulties placing exchange or redemption orders by telephone. In that case, shareholders should consider using the fund’s other exchange and redemption procedures described under “Exchanging shares” and “Redeeming shares.”

The transfer agent or the fund will employ reasonable procedures to confirm that any telephone, electronic or other exchange or redemption request is genuine, which may include recording calls, asking the caller to provide certain personal identification information, employing identification numbers, sending you a written confirmation or requiring other confirmation procedures from time to time. If these procedures are followed, neither the fund nor its agents will bear any liability for these transactions, subject to applicable law.

The fund does not consider the U.S. Postal Service or private delivery services to be its agents. Therefore, deposits in the mail or with such delivery services, or receipt at the fund’s post office box, of purchase requests or redemption orders, do not constitute receipt by the fund or its transfer agent.

For your protection, the fund or your Service Agent may request additional information in connection with large redemptions, unusual activity in your account, or otherwise to ensure your redemption request is in good order. Please contact your Service Agent or the fund for more information.

To be in good order, your redemption request must include a Medallion signature guarantee if you:

For other types of transactions involving changes to your account registration information, please contact the fund or your Service Agent.

When a Medallion signature guarantee is called for, the shareholder should have a Medallion signature guarantee stamped under his or her signature. You can obtain a signature guarantee from most banks, dealers, brokers, credit unions and federal savings and loan institutions, national securities exchanges, registered securities associations and clearing agencies (each an “Eligible Guarantor Institution”), but not from a notary public.

The fund and its agents reserve the right to reject any Medallion signature guarantee pursuant to written signature guarantee standards or procedures, which may be revised in the future to permit them to reject Medallion signature guarantees from Eligible Guarantor Institutions. The fund may change the signature guarantee requirements from time to time without prior notice to shareholders.

The distribution of this Prospectus and the offering of shares of the fund are restricted in certain jurisdictions. This Prospectus is not an offer or solicitation in any jurisdiction where such offer or solicitation is unlawful, where the person making an offer or solicitation is not authorized to make it or a person receiving an offer or solicitation may not lawfully receive it or may not lawfully invest in the fund. Investors should inform themselves as to the legal requirements within their own country before investing in the fund.

This Prospectus, and the offer of shares hereunder, are not directed at persons outside the United States. In particular, the fund is not intended to be marketed to prospective investors in any member state of the European Union, Iceland, Liechtenstein or Norway (collectively, the “European Economic Area” or “EEA”). No notification or application has been made to the competent authority of any member state of the EEA under the Alternative Investment Fund Managers Directive (or any applicable legislation or regulations made thereunder) to market the fund to investors in the EEA and it is not intended that any such notification or application shall be made.

U.S. citizens with addresses in the United States, and non-U.S. citizens who reside in the United States and have U.S. addresses, are permitted to establish accounts with the fund. For these purposes, the “United States” and “U.S.” include U.S. territories.

The fund generally does not permit persons who do not reside in the United States or who do not have U.S. addresses to establish accounts. Therefore, U.S. citizens residing in foreign countries, as well as non-U.S. citizens residing in foreign countries, generally will not be permitted to establish accounts with the fund.

For further information, you or your Service Agent may contact the fund at 1-877-721-1926 or 1-203-703-6002.

Federal anti-money laundering regulations require all financial institutions to obtain, verify and record information that identifies each person who opens an account. When you sign your account application, you may be asked to provide additional information in order for the fund to verify your identity in accordance with these regulations. If you are opening the account in the name of a legal entity (e.g. partnership, limited liability company, business trust, corporation, etc.), you may also be required to supply the identity of the beneficial owners and a control individual with management authority, prior to the opening of your account. Accounts may be restricted and/or closed, and the monies withheld, pending verification of this information or as otherwise required under these and other federal regulations.

Small accounts may be subject to a small account fee or to mandatory redemption, as described below. Please contact your Service Agent or the fund for information on the policy applicable to your account.

To offset the relatively higher impact on fund expenses of servicing smaller accounts, the fund may charge you a fee of $3.75 per account that is determined and assessed quarterly by your Service Agent or by LMIS for LMIS Accounts on the next-to-last business day of the quarter (with an annual maximum of $15.00 per account) if the value of your account is below $1,000 (if applicable, $250 for retirement plans that are not employer-sponsored) for any reason (including declines in net asset value). The small account fee will be charged by redeeming shares in your account. If the value of your account is $3.75 or less, the amount in the account may be exhausted to pay the small account fee. If your Service Agent or LMIS assesses a small account fee, the small account fee will not be assessed on systematic investment plans until the end of the first quarter after the account has been established for 21 months. Payment of the small account fee through a redemption of fund shares may result in tax consequences to you (see “Taxes” for more information).

The small account fee will not be charged on, if applicable: (i) Retirement Plans (but will be charged on other plans that are not employer-sponsored such as traditional and Roth individual retirement accounts, Coverdell education savings accounts, individual 403(b)(7) custodial accounts, Keogh plans, SEPs, SARSEPs, SIMPLE IRAs or similar accounts); (ii) Legg Mason funds that have been closed to subsequent purchases for all classes; (iii) accounts that do not have a valid address as evidenced by mail being returned to the fund or its agents; (iv) Class R, Class I and Class IS shares; and (v) for new accounts (except for new accounts opened by way of an exchange), a small account fee will not be charged during the calendar quarter in which you open your account.

If your share class is no longer offered, you may not be able to bring your account up to the minimum investment amount (although you may exchange into existing accounts of other Legg Mason funds in which you hold the same share class, to the extent otherwise permitted by those funds and subject to any applicable sales charges).

The small account fee is calculated on a fund-by-fund basis. If you have accounts in multiple funds, they will not be aggregated for the purpose of calculating the small account fee.

Some shareholders who hold accounts in Classes A and C of the same fund may have those accounts aggregated for the purposes of these calculations. Please contact the fund or your Service Agent for more information.

solely due to declines in net asset value and/or failure to invest at least $500 or $250 for retirement plans that are not employer-sponsored within a reasonable period). You will be notified in writing and will have 60 days to make an additional investment to bring your account value up to the required level. If you choose not to do so within this 60-day period, the fund may close your account and send you the redemption proceeds. If your share class is no longer offered, you may not be able to bring your account up to the minimum investment amount.

Some shareholders who hold accounts in multiple classes of the same fund may have those accounts aggregated for the purposes of these calculations. If your account is closed, you will not be eligible to have your account reinstated without imposition of any sales charges that may apply to your new purchase. Please contact your Service Agent for more information. Any redemption of fund shares may result in tax consequences to you (see “Taxes” for more information).

This policy does not apply to: (i) certain broker-controlled accounts established through the National Securities Clearing Corporation’s Networking system; (ii) qualified retirement plans (such as 401(k) plans, 403(b) plans, profit sharing plans and money purchase plans); (iii) accounts with an active systematic investment plan; (iv) accounts with an active systematic withdrawal plan; (v) accounts that do not have a valid address as evidenced by mail being returned to the fund or its agents and (vi) accounts identified to us by the applicable Service Agent as being fee-based accounts.

The fund may, with prior notice, change the minimum size of accounts subject to mandatory redemption, which may vary by class, implement fees for other small accounts or change the amount of the fee for small direct accounts.

Subject to applicable law, the fund may, with prior notice, adopt other policies from time to time requiring mandatory redemption of shares in certain circumstances.

For more information, please contact your Service Agent or the fund or consult the SAI.

Frequent purchases and redemptions of fund shares may, in many cases, interfere with the efficient management of the fund, increase fund transaction costs, and have a negative effect on the fund’s long-term shareholders. For example, in order to handle large flows of cash into and out of the fund, the subadviser may need to allocate more assets to cash or other short-term investments or sell securities, rather than maintaining full investment in securities selected to achieve the fund’s investment objective. Frequent trading may cause the fund to sell securities at less favorable prices. Transaction costs, such as brokerage commissions and market spreads, can detract from the fund’s performance. In addition, the return received by long-term shareholders may be reduced when trades by other shareholders are made in an effort to take advantage of certain pricing discrepancies, when, for example, it is believed that the fund’s share price, which is determined at the close of the NYSE on each trading day, does not accurately reflect the value of the fund’s investments. Funds investing in foreign securities have been particularly susceptible to this form of arbitrage, but other funds could also be affected.

Because of the potential harm to funds sold by the fund’s distributor and their long-term shareholders, the Board has approved policies and procedures that are intended to detect and discourage excessive trading and market timing abuses through the use of various surveillance techniques. Under these policies and procedures, the fund may limit additional exchanges or purchases of fund shares by shareholders who are believed by the manager to be engaged in these abusive trading activities in the fund or in other funds sold by the distributor. In the event that an exchange or purchase request is rejected, the shareholder may nonetheless redeem its shares. The intent of the policies and procedures is not to inhibit legitimate strategies, such as asset allocation, dollar cost averaging, or similar activities that may nonetheless result in frequent trading of fund shares.

Under the fund’s policies and procedures, the fund reserves the right to restrict or reject purchases of shares (including exchanges) without prior notice whenever a pattern of excessive trading by a shareholder is detected in funds sold by the distributor. A committee established by the manager administers the policy. The policy provides that the committee may take action, which may include using its best efforts to restrict a shareholder’s trading privileges in funds sold by the distributor, if that shareholder has engaged in one or more “Round Trips” across all funds sold by the distributor. However, the committee has the discretion to determine that action is not necessary if it is determined that the pattern of trading is not abusive or harmful. In making such a determination, the committee will consider, among other things, the nature of the shareholder’s account, the reason for the frequent trading, the amount of trading and the particular funds in which the trading has occurred. Additionally, the committee has the discretion to make inquiries or to take any action against a shareholder whose trading appears inconsistent with the frequent trading policy, regardless of the number of Round Trips. Examples of the types of actions the committee may take include heightened surveillance of a shareholder account, providing a written warning letter to an account holder, restricting the shareholder from purchasing additional shares in the fund altogether or imposing other restrictions (such as requiring purchase orders to be submitted by mail) that would deter the shareholder from trading frequently in the fund. The committee will generally follow a system of progressive deterrence, although it is not required to do so.

A “Round Trip” is defined as a purchase (including subscriptions and exchanges) into a fund sold by the distributor either preceded or followed by a sale (including redemptions and exchanges) of the same or a similar number of shares out of that fund within 30 days of such purchase. Purchases and sales of the fund’s shares pursuant to an automatic investment plan or similar program for periodic transactions are not considered in determining Round Trips. These policies and procedures do not apply to money market funds sold by the distributor.

account. The fund’s ability to monitor trading in omnibus accounts may, however, be severely limited due to the lack of access to an individual investor’s trading activity when orders are placed through these types of accounts. There may also be operational and technological limitations on the ability of the fund’s service providers to identify or terminate frequent trading activity within the various types of omnibus accounts. The distributor has entered into agreements with intermediaries requiring the intermediaries to, among other things, help identify frequent trading activity and prohibit further purchases or exchanges by a shareholder identified as having engaged in frequent trading.

The fund has also adopted policies and procedures to prevent the selective release of information about the fund’s holdings, as such information may be used for market-timing and similar abusive practices.

The policies provide for ongoing assessment of the effectiveness of current policies and surveillance tools, and the Board reserves the right to modify these or adopt additional policies and restrictions in the future. Shareholders should be aware, however, that any surveillance techniques currently employed by the fund or other techniques that may be adopted in the future may not be effective, particularly where the trading takes place through certain types of omnibus accounts. Furthermore, the fund may not apply its policies consistently or uniformly, resulting in the risk that some shareholders may be able to engage in frequent trading while others will bear the costs and effects of that trading.

Although the fund will attempt to monitor shareholder transactions for certain patterns of frequent trading activity, there can be no assurance that all such trading activity can be identified, prevented or terminated. Monitoring of shareholder transactions may only occur for shareholder transactions that exceed a certain transaction amount threshold, which may change from time to time. The fund reserves the right to refuse any client or reject any purchase order for shares (including exchanges) for any reason.

If you hold shares through a Service Agent, your Service Agent may establish and maintain your account and be the shareholder of record. In the event that the fund holds a shareholder meeting, your Service Agent, as record holder, will be entitled to vote your shares and may seek voting instructions from you. If you do not give your Service Agent voting instructions, your Service Agent, under certain circumstances, may nonetheless be entitled to vote your shares.

If you bought shares directly from the fund, you will receive a confirmation from the fund after each transaction (except a reinvestment of dividends or capital gain distributions, an investment made through the Systematic Investment Plan, exchanges made through a systematic exchange plan and withdrawals made through the Systematic Withdrawal Plan). Shareholders will receive periodic account statements.

To assist you in the management of your account you may direct the transfer agent to send copies of your confirmations and/or periodic statements to another party whom you designate, at no charge.

The fund generally pays dividends quarterly from its net investment income, if any, and from short-term capital gain (if any). The fund generally distributes long-term capital gain, if any, once in December and at such other times as are necessary. The fund may pay additional distributions and dividends in order to avoid a federal tax.

Unless you elect to receive dividends and/or other distributions in cash, your dividends and capital gain distributions will be automatically reinvested in shares of the same class you hold, at the net asset value determined on the reinvestment date. You do not pay a sales charge on reinvested distributions or dividends.

If you hold shares directly with the fund and you elect to receive dividends and/or distributions in cash, you have the option to receive such dividends and/or distributions via a direct deposit to your bank account or, provided that the dividend and/or distribution is $10.00 or more, by check. If you choose to receive dividends and/or distributions via check, amounts less than $10.00 will automatically be reinvested in fund shares as described above.

If you do not want dividends and/or distributions in amounts less than $10.00 to be reinvested in fund shares, you must elect to receive dividends and distributions via a direct deposit to your bank account.

If you hold Class A, Class A2 or Class C shares directly with the fund, you may instruct the fund to have your dividends and/or distributions invested in the corresponding class of shares of another fund sold by the distributor, subject to the following conditions:

To change those instructions, you must notify your Service Agent or the fund at least three days before the next distribution is to be paid.

Please contact your Service Agent or the fund to discuss what options are available to you for receiving your dividends and other distributions.

The Board reserves the right to revise the dividend policy or postpone the payment of dividends, if warranted in the Board’s judgment, due to unusual circumstances.

The following discussion is very general, applies only to shareholders who are U.S. persons, and does not address shareholders subject to special rules, such as those who hold fund shares through an IRA, 401(k) plan or other tax-advantaged account. Except as specifically noted, the discussion is limited to federal income tax matters, and does not address state, local, foreign or non-income taxes. Further information regarding taxes, including certain federal income tax considerations relevant to non-U.S. persons, is included in the SAI. Because each shareholder’s circumstances are different and special tax rules may apply, you should consult your tax adviser about federal, state, local and/or foreign tax considerations that may be relevant to your particular situation.

In general, redeeming shares, exchanging shares and receiving dividends and distributions (whether received in cash or reinvested in additional shares or shares of another fund) are all taxable events. An exchange between classes of shares of the same fund normally is not taxable for federal income tax purposes, whether or not the shares are held in a taxable account.

The following table summarizes the tax status of certain transactions related to the fund.

Distributions attributable to short-term capital gains are taxable to you as ordinary income. Distributions attributable to qualified dividend income received by the fund, if any, may be eligible to be taxed to noncorporate shareholders at the reduced rates applicable to long-term capital gain if certain requirements are satisfied. Distributions of net capital gain reported by the fund as capital gain dividends are taxable to you as long-term capital gain regardless of how long you have owned your shares. Noncorporate shareholders ordinarily pay tax at reduced rates on long-term capital gain.

You may want to avoid buying shares when the fund is about to declare a dividend or capital gain distribution because it will be taxable to you even though it may economically represent a return of a portion of your investment.

A Medicare contribution tax is imposed at the rate of 3.8% on all or a portion of net investment income of U.S. individuals if their income exceeds specified thresholds and on all or a portion of undistributed net investment income of certain estates and trusts. Net investment income generally includes for this purpose dividends and capital gain distributions paid by the fund and gain on the redemption or exchange of fund shares.

A dividend declared by the fund in October, November or December and paid during January of the following year will, in certain circumstances, be treated as paid in December for tax purposes.

If the fund meets certain requirements with respect to its holdings, it may elect to “pass through” to shareholders foreign taxes that it pays, in which case each shareholder will include the amount of such taxes in computing gross income, but will be eligible to claim a credit or deduction for such taxes, subject to generally applicable limitations on such deductions and credits. If the fund does not so elect, the foreign taxes paid or withheld will nonetheless reduce the fund’s taxable income. In addition, the fund’s investment in certain foreign securities, foreign currencies or foreign currency derivatives may affect the amount, timing, and character of fund distributions to shareholders.

After the end of each year, your Service Agent or the fund will provide you with information about the distributions and dividends you received and any redemptions of shares during the previous year. Because each shareholder’s circumstances are different and special tax rules may apply, you should consult your tax adviser about your investment in the fund.

You may buy, exchange or redeem shares at their net asset value next determined after receipt of your request in good order, adjusted for any applicable sales charge. The fund’s net asset value per share is the value of its assets minus its liabilities divided by the number of shares outstanding. Net asset value is calculated separately for each class of shares.

The fund calculates its net asset value every day the NYSE is open. The fund generally values its securities and other assets and calculates its net asset value as of the scheduled close of regular trading on the NYSE, normally at 4:00 p.m. (Eastern time). If the NYSE closes at a time other than the scheduled closing time, the fund will calculate its net asset value as of the scheduled closing time. The NYSE is closed on certain holidays listed in the SAI.

In order to buy, redeem or exchange shares at a certain day’s price, you must place your order with your Service Agent or the fund transfer agent before the scheduled close of regular trading on the NYSE on that day to receive that day’s price. If the NYSE closes early on that day, you must place your order prior to the scheduled closing time. It is the responsibility of the Service Agent to transmit all orders to buy, exchange or redeem shares to the fund transfer agent on a timely basis.

Valuation of the fund’s securities and other assets is performed in accordance with procedures approved by the Board. These procedures delegate most valuation functions to the manager, which generally uses independent third party pricing services approved by the Board. Under the procedures, assets are valued as follows:

Many factors may influence the price at which the fund could sell any particular portfolio investment. The sales price may well differ—higher or lower—from the fund’s last valuation, and such differences could be significant, particularly for securities that trade in relatively thin markets and/or markets that experience extreme volatility. Moreover, valuing securities using fair value methodologies involves greater reliance on judgment than valuing securities based on market quotations. A fund that uses fair value methodologies may value those securities higher or lower than another fund using market quotations or its own fair value methodologies to price the same securities. There can be no assurance that the fund could obtain the value assigned to a security if it were to sell the security at approximately the time at which the fund determines its net asset value. Investors who purchase or redeem fund shares on days when the fund is holding fair-valued securities may receive a greater or lesser number of shares, or higher or lower redemption proceeds, than they would have received if the fund had not fair-valued the security or had used a different methodology.

The financial highlights tables are intended to help you understand the performance of each class for the past five years, unless otherwise noted. Class A2, Class C, and Class R shares of the fund had not begun operations as of the date of this Prospectus and therefore have no financial highlights to report. The returns for Class A2, Class C, and Class R shares will differ from those of other classes to the extent that their expenses differ. Certain information reflects financial results for a single fund share. Total return represents the rate that an investor would have earned (or lost) on an investment in the fund, assuming reinvestment of all dividends and other distributions. Unless otherwise noted, this information has been audited by the fund’s independent registered public accounting firm, PricewaterhouseCoopers LLP, whose report, along with the fund’s financial statements, is incorporated by reference into the fund’s SAI (see back cover) and is included in the fund’s annual report. The fund’s annual report is available upon request by calling toll-free 1-877-721-1926 or via the following hyperlink: (https://www.sec.gov/Archives/edgar/data/1474103/000119312520054899/d60576dncsr.htm).

The availability of certain sales charge waivers and discounts will depend on whether you purchase your shares directly from the fund or through a financial intermediary. Financial intermediaries may have different policies and procedures regarding the availability of front-end sales load waivers or contingent deferred (back-end) sales load waivers, which are discussed below. In all instances, it is the purchaser’s responsibility to notify the fund or the purchaser’s financial intermediary at the time of purchase of any relationship or other facts qualifying the purchaser for sales charge waivers or discounts. For waivers and discounts not available through a particular financial intermediary, shareholders will have to purchase fund shares directly from the fund or through another financial intermediary to receive these waivers or discounts.

Effective April 10, 2017 to June 29, 2020, shareholders purchasing fund shares through a Merrill Lynch platform or account are eligible only for the following load waivers (front-end sales charge waivers and contingent deferred, or back-end, sales charge waivers) and discounts, which may differ from those disclosed elsewhere in this Prospectus or SAI.

Investors purchasing Class A shares of the fund through a Merrill Lynch, Pierce, Fenner & Smith Incorporated platform or account (“Merrill Lynch Accounts”) are eligible for a waiver of the initial sales load on certain purchases of Class A shares that may differ from others described in this Prospectus. Merrill Lynch Accounts that are eligible for the waiver include: (i) employer-sponsored retirement, deferred compensation and employee benefit plans (including health savings accounts) and trusts used to fund those plans, provided that the shares are not held in a commission-based brokerage account and shares are held for the benefit of the plan; (ii) shares purchased by or through a Section 529 plan; (iii) shares purchased through a Merrill Lynch affiliated investment advisory program; (iv) shares purchased by third-party investment advisers on behalf of their advisory clients through Merrill Lynch’s platform; (v) shares of funds purchased through the Merrill Edge Self-Directed platform; (vi) shares purchased through reinvestment of capital gains distributions and dividend reinvestment when purchasing shares of the same fund (but not any other fund within the fund family); (vii) shares exchanged from Class C (i.e., level-load) shares of the same fund in the month of or following the 10-year anniversary of the purchase date; (viii) employees and registered representatives of Merrill Lynch or its affiliates and their family members; (ix) Directors or Trustees of the fund, and employees of the fund’s investment adviser or any of its affiliates, as described in this Prospectus; and (x) shares purchased from the proceeds of redemptions within the same fund family, provided (1) the repurchase occurs within 90 days following the redemption, (2) the redemption and purchase occur in the same account, and (3) redeemed shares were subject to a front-end or deferred sales load (known as Rights of Reinstatement).

Contingent deferred sales charge waivers on Class A and C shares available at Merrill Lynch

Investors holding shares subject to a contingent deferred sales charge through Merrill Lynch Accounts are eligible for a waiver of the contingent deferred sales charge on the redemption of shares: (i) due to the death or disability of the shareholder; (ii) as part of a systematic withdrawal plan as described in this Prospectus; (iii) due to the return of excess contributions from an IRA Account; (iv) as part of a required minimum distribution for IRAs and retirement accounts due to the shareholder reaching age 70 1/2; (v) sold to pay Merrill Lynch fees but only if the transaction is initiated by Merrill Lynch; (vi) acquired through the Right of Reinstatement; and (vii) held in retirement brokerage accounts that are exchanged for a lower cost share class due to transfer to certain fee based accounts or platforms (applicable only to Class A shares and Class C shares).

The following discounts are available on purchases of Class A shares through Merrill Lynch Accounts: (i) breakpoints in the Class A sales charge schedule described in this Prospectus; (ii) rights of accumulation (ROA), which entitle shareholders to breakpoint discounts, will be automatically calculated based on the aggregated holdings of fund family assets held by accounts within the purchaser’s household at Merrill Lynch; eligible fund family assets not held at Merrill Lynch may be included in the ROA calculation only if the shareholder notifies his or her financial adviser about such assets; and (iii) letters of intent (LOI), which allow for breakpoint discounts based on anticipated purchases within a fund family, through Merrill Lynch, over a 13-month period of time.

Class A or Class A2 (as applicable) Sales Charge Waivers Available Only Through Certain Service Agents

Class A or Class A2 shares may be purchased at net asset without a sales charge by employees of any Service Agents that offer this waiver to their employees or employee-related accounts.

Effective June 30, 2020, shareholders purchasing fund shares through a Merrill Lynch platform or account will be eligible only for the following load waivers (front-end sales charge waivers and contingent deferred, or back-end, sales charge waivers) and discounts, which may differ from those disclosed elsewhere in this fund’s prospectus or SAI.

Front-end load Discounts Available at Merrill Lynch: Breakpoints, Rights of Accumulation & Letters of Intent

Class A Shares Front-End Sales Charge Waivers Available at Ameriprise Financial:

The following information applies to Class A shares purchases if you have an account with or otherwise purchase fund shares through Ameriprise Financial:

Effective June 1, 2018, shareholders purchasing fund shares through an Ameriprise Financial platform or account are eligible for the following front-end sales charge waivers and discounts, which may differ from those disclosed elsewhere in this fund’s Prospectus or SAI:

Front-End Sales Charge Waivers on Class A Shares Available at Morgan Stanley Wealth Management:

Effective July 1, 2018, shareholders purchasing fund shares through a Morgan Stanley Wealth Management transactional brokerage account are eligible only for the following front-end sales charge waivers with respect to Class A shares, which may differ from and may be more limited than those disclosed elsewhere in this fund’s Prospectus or SAI.

RAYMOND JAMES & ASSOCIATES, INC., RAYMOND JAMES FINANCIAL SERVICES, INC. AND EACH ENTITY’S AFFILIATES (“RAYMOND JAMES”)

Effective March 1, 2019, shareholders purchasing fund shares through a Raymond James platform or account, or through an introducing broker-dealer or independent registered investment adviser for which Raymond James provides trade execution, clearance, and/or custody services, are eligible only for the following load waivers (front-end sales charge waivers and contingent deferred, or back-end, sales charge waivers) and discounts, which may differ from those disclosed elsewhere in this fund’s Prospectus or SAI.

Contingent Deferred Sales Charge Waivers on Class A and Class C Shares Available at Raymond James

Front-End Load Discounts Available at Raymond James: Breakpoints, Rights of Accumulation, and/or Letters of Intent

Effective on or after May 1, 2020, clients of Edward Jones (also referred to as “shareholders”) purchasing fund shares on the Edward Jones commission and fee-based platforms are eligible only for the following sales charge discounts (also referred to as “breakpoints”) and waivers, which can differ from breakpoints and waivers described elsewhere in the mutual fund prospectus or SAI or through another broker-dealer. In all instances, it is the shareholder’s responsibility to inform Edward Jones at the time of purchase of any relationship, holdings of the Legg Mason Funds complex or other facts qualifying the purchaser for breakpoints or waivers. Edward Jones can ask for documentation of such circumstance.

Sales charges are waived for the following shareholders and in the following situations:

If the shareholder purchases shares that are subject to a CDSC and those shares are redeemed before the CDSC is expired, the shareholder is responsible to pay the CDSC except in the following conditions:

Effective May 1, 2020, if you purchase fund shares through a Janney brokerage account, you will be eligible for the following load waivers (front-end sales charge waivers and contingent deferred sales charge (“CDSC”), or back-end sales charge, waivers) and discounts, which may differ from those disclosed elsewhere in this fund’s Prospectus or SAI.

Front-end sales charge* discounts available at Janney: breakpoints, rights of accumulation, and/or letters of intent

Your Privacy and the Security of Your Personal Information is Very Important to the Legg Mason Funds

This Privacy and Security Notice (the “Privacy Notice”) addresses the Legg Mason Funds’ privacy and data protection practices with respect to nonpublic personal information the Funds receive. The Legg Mason Funds include any funds sold by the Funds’ distributor, Legg Mason Investor Services, LLC, as well as Legg Mason-sponsored closed-end funds. The provisions of this Privacy Notice apply to your information both while you are a shareholder and after you are no longer invested with the Funds.

The Funds collect and maintain nonpublic personal information about you in connection with your shareholder account. Such information may include, but is not limited to:

The Funds do not sell or share your nonpublic personal information with third parties or with affiliates for their marketing purposes, or with other financial institutions or affiliates for joint marketing purposes, unless you have authorized the Funds to do so. The Funds do not disclose any nonpublic personal information about you except as may be required to perform transactions or services you have authorized or as permitted or required by law. The Funds may disclose information about you to:

Except as otherwise permitted by applicable law, companies acting on the Funds’ behalf, including those outside the United States, are contractually obligated to keep nonpublic personal information the Funds provide to them confidential and to use the information the Funds share only to provide the services the Funds ask them to perform.

The Funds may disclose nonpublic personal information about you when necessary to enforce their rights or protect against fraud, or as permitted or required by applicable law, such as in connection with a law enforcement or regulatory request, subpoena, or similar legal process. In the event of a corporate action or in the event a Fund service provider changes, the Funds may be required to disclose your nonpublic personal information to third parties. While it is the Funds’ practice to obtain protections for disclosed information in these types of transactions, the Funds cannot guarantee their privacy policy will remain unchanged.

The Funds will notify you annually of their privacy policy as required by federal law. While the Funds reserve the right to modify this policy at any time they will notify you promptly if this privacy policy changes.

The Funds maintain appropriate physical, electronic and procedural safeguards designed to guard your nonpublic personal information. The Funds’ internal data security policies restrict access to your nonpublic personal information to authorized employees, who may use your nonpublic personal information for Fund business purposes only.

Although the Funds strive to protect your nonpublic personal information, they cannot ensure or warrant the security of any information you provide or transmit to them, and you do so at your own risk. In the event of a breach of the confidentiality or security of your nonpublic personal information, the Funds will attempt to notify you as necessary so you can take appropriate protective steps. If you have consented to the Funds using electronic communications or electronic delivery of statements, they may notify you under such circumstances using the most current email address you have on record with them.

In order for the Funds to provide effective service to you, keeping your account information accurate is very important. If you believe that your account information is incomplete, not accurate or not current, if you have questions about the Funds’ privacy practices, or our use of your nonpublic personal information, write the Funds using the contact information on your account statements, email the Funds by clicking on the Contact Us section of the Funds’ website at www.leggmason.com, or contact the Funds at 1-877-721-1926. Revised April 2018.

You may visit www.leggmason.com/mutualfundsliterature for a free copy of a Prospectus, Statement of Additional Information (“SAI”) or an Annual or Semi-Annual Report.

Shareholder reports Additional information about the fund’s investments is available in the fund’s Annual and Semi-Annual Reports to shareholders. In the fund’s Annual Report, you will find a discussion of the market conditions and investment strategies that significantly affected the fund’s performance during its last fiscal year. The independent registered public accounting firm’s report and financial statements in the fund’s Annual Report are incorporated by reference into (are legally a part of) this Prospectus (https://www.sec.gov/Archives/edgar/data/1474103/000119312520054899/d60576dncsr.htm).

The fund sends only one report to a household if more than one account has the same last name and same address. Contact your Service Agent or the fund if you do not want this policy to apply to you.

Statement of additional information The SAI provides more detailed information about the fund and is incorporated by reference into (is legally a part of) this Prospectus.

You can make inquiries about the fund or obtain shareholder reports or the SAI (without charge) by contacting your Service Agent, by calling the fund at 1-877-721-1926, or by writing to the fund at 100 First Stamford Place, Attn: Shareholder Services – 5^th Floor, Stamford, Connecticut 06902.

Reports and other information about the fund are available on the EDGAR Database on the Securities and Exchange Commission’s Internet site at http://www.sec.gov. Copies of this information may be obtained for a duplicating fee by electronic request at the following E-mail address: publicinfo@sec.gov.

If someone makes a statement about the fund that is not in this Prospectus, you should not rely upon that information. Neither the fund nor the distributor is offering to sell shares of the fund to any person to whom the fund may not lawfully sell its shares.

Share class (Symbol): A (GOBAX), A2 (LOBAX), C (LGOCX), C1 (GOBCX), FI (GOBFX), R (LBORX), I (GOBIX), IS (GOBSX)

The Securities and Exchange Commission has not approved or disapproved these securities or determined whether this Prospectus is accurate or complete. Any statement to the contrary is a crime.

The accompanying table describes the fees and expenses that you may pay if you buy and hold shares of the fund.

This 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 assumes:

Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Under normal market conditions, the fund will invest at least 80% of its net assets in fixed income securities of issuers located in developed market countries. Any country that, at the time of purchase, has a sovereign debt rating of A- or better from at least one nationally recognized statistical ratings organization (“NRSRO”) or is included in the FTSE World Government Bond Index will be considered a developed country. The fund will invest in both investment grade and below investment grade fixed income securities, and intends to invest less than 35% of its net assets in below investment grade fixed income securities (commonly known as “high yield debt” or “junk bonds”). The portfolio managers intend to maintain an average weighted portfolio quality of A- or better, whether composed of rated securities or unrated securities deemed by the portfolio managers to be of comparable quality. The fund’s investments may include securities of sovereign governments and supranational organizations. The fund may invest up to 25% of its net assets in convertible debt securities.

The fund may invest in currency forwards in order to hedge its currency exposure in bond positions or to gain currency exposure. In addition, the fund may invest in bond futures, interest rate futures, swaps (including interest rate and total return swaps), credit default swaps (including buying and selling credit default swaps), and options. The fund may use derivatives to enhance total return, to hedge against fluctuations in securities prices, interest rates or currency exchange rates, to change the effective duration of its portfolio, to manage certain investment risks and/or as a substitute for the purchase or sale of securities or currencies. These investments may be significant at times. Although the portfolio managers have the flexibility to use these instruments for hedging purposes, they may choose not to for a variety of reasons, even under very volatile market conditions. Derivative instruments are taken into account when determining compliance with the fund’s 80% investment policy.

The fund will normally hold a portfolio of fixed income securities of issuers located in a minimum of six countries.

Although the fund invests primarily in issuers in developed market countries as defined above, the fund may also invest in issuers in emerging market countries, and some of the countries that the fund considers to be developed may still have certain economic or other characteristics that are considered developing and are similar to emerging market countries.

The fund may invest in securities of any maturity. The weighted average effective duration of the fund’s portfolio, including derivatives, is expected to range from 1 to 10 years but for individual markets may be greater or lesser depending on the portfolio managers’ view of the prospects for lower interest rates and the potential for capital gains.

The fund is classified as “non-diversified,” which means it may invest a larger percentage of its assets in a smaller number of issuers than a diversified fund.

securities are more likely to suffer a credit loss than non-subordinated securities of the same issuer and will be disproportionately affected by a default, downgrade or perceived decline in creditworthiness.

Issuer risk. The market price of a security can go up or down more than the market as a whole and can perform differently from the value of the market as a whole, due to factors specifically relating to the security’s issuer, such as disappointing earnings reports by the issuer, unsuccessful products or services, loss of major customers, changes in management, corporate actions, negative perception in the marketplace, major litigation against the issuer or changes in government regulations affecting the issuer or the competitive environment. The fund may experience a substantial or complete loss on an individual security.

Industry or sector focus risk. Although the fund does not employ an industry or sector focus, the fund may be susceptible to an increased risk of loss, including losses due to events that adversely affect the fund’s investments more than the market as a whole, to the extent that the fund has greater exposure to the securities of a particular issuer or issuers within the same industry or sector.

Portfolio turnover risk. Active and frequent trading may increase a shareholder’s tax liability and the fund’s transaction costs, which could detract from fund performance.

Currency derivatives risk. Currency futures, forwards or options may not always work as intended, and in specific cases the fund may be worse off than if it had not used such instrument(s). There may not always be suitable hedging instruments available. Even where suitable hedging instruments are available, the portfolio managers may determine not to hedge the fund’s currency risks.

Hedging risk. There can be no assurance that the fund will engage in hedging transactions at any given time, even under volatile market conditions, or that any hedging transactions the fund engages in will be successful. Hedging transactions involve costs and may reduce gains or result in losses.

These and other risks are discussed in more detail in the Prospectus or in the Statement of Additional Information.

The accompanying bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the fund’s performance from year to year for Class IS shares. The table shows the average annual total returns of each class of the fund that has been in operation for at least one full calendar year and also compares the fund’s performance with the average annual total returns of an index or other benchmark. Performance for classes other than those shown may vary from the performance shown to the extent the expenses for those classes differ. The fund makes updated performance information, including its current net asset value, available at www.leggmason.com/mutualfunds (select fund and share class), or by calling the fund at 1-877-721-1926.

The fund’s past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future.

Sales charges are not reflected in the accompanying bar chart, and if those charges were included, returns would be less than those shown.

Subadviser: Brandywine Global Investment Management, LLC (“Brandywine Global”)

Portfolio managers: Primary responsibility for the day-to-day management of the fund lies with the following portfolio managers.

The fund’s initial and subsequent investment minimums generally are set forth in the accompanying table:

Your Service Agent may impose higher or lower investment minimums, or may impose no minimum investment requirement.

The fund’s distributions are generally taxable as ordinary income or capital gains.

The fund’s investment objective is to maximize total return consisting of income and capital appreciation.

Under normal market conditions, the fund will invest at least 80% of its net assets in fixed income securities of issuers located in developed market countries.

Any country that, at the time of purchase, has a sovereign debt rating of A- or better from at least one nationally recognized statistical ratings organization (“NRSRO”) or is included in the FTSE World Government Bond Index will be considered a developed country.

An issuer is considered by the portfolio managers to be located in a developed country if such issuer meets one or more of the following criteria:

Although the fund invests primarily in issuers in developed market countries as defined above, the fund may also invest in emerging market countries, and some of the countries that the fund considers to be developed may still have certain economic or other characteristics that are considered developing and are similar to emerging market countries.

The fund’s investment objective may be changed by the Board of Trustees (the “Board”) without shareholder approval and on notice to shareholders.

The fund is classified as “non-diversified,” which means it may invest a larger percentage of its assets in a smaller number of issuers than a diversified fund.

The fund’s 80% investment policy may be changed by the Board without shareholder approval upon 60 days’ prior notice to shareholders. For purposes of this 80% policy, net assets include borrowings for investment purposes, if any.

The fund’s other investment strategies and policies may be changed from time to time without shareholder approval, unless specifically stated otherwise in this Prospectus or in the statement of additional information (“SAI”).

The fund may invest in securities of any maturity. The maturity of a fixed income security is a measure of the time remaining until the final payment on the security is due. The weighted average effective duration of the fund’s portfolio, including derivatives, however, is expected to range from 1 to 10 years. The fund’s investments may be of any duration.

debentures, bonds (including zero coupon bonds), convertible and non-convertible notes, commercial paper, certificates of deposits, freely transferable promissory notes and bankers acceptances issued by industrial, utility, finance, commercial banking or bank holding company organizations; mortgage-backed securities (including collateralized debt obligations); asset-backed securities; and emerging markets debt.

The fund may hold debt securities of any credit quality, whether rated or unrated. As a general guideline, the fund intends to maintain an average weighted portfolio quality of A- or better, whether composed of rated securities or unrated securities deemed by the subadviser to be of comparable quality. The fund will invest in both investment grade and below investment grade securities and currencies of developed and emerging market countries. Fixed income securities rated below investment grade are commonly known as “junk bonds.” Investment grade securities are securities rated at the time of purchase by at least one NRSRO within one of the top four categories (without regard to +/- designations), or, if unrated, judged by the subadviser to be of comparable credit quality.

The fund may engage in a variety of transactions using derivatives, such as futures, options, forward foreign currency transactions and swaps (including buying and selling credit default swaps). Derivatives are financial instruments whose value depends upon, or is derived from, the value of something else, such as one or more underlying investments, indexes or currencies. Derivatives may be used by the fund for any of the following purposes:

debt securities includes debt issued by U.S. or non-U.S. companies of all kinds, including those with small, mid and large capitalizations. Corporate debt may carry variable or floating rates of interest.

Variable rate securities reset at specified intervals, while floating rate securities reset whenever there is a change in a specified index rate. In most cases, these reset provisions reduce the impact of changes in market interest rates on the value of the security. However, the value of these securities may decline if their interest rates do not rise as much, or as quickly, as other interest rates. Conversely, these securities will not generally increase in value if interest rates decline. The fund may also invest in inverse floating rate debt instruments (“inverse floaters”). Interest payments on inverse floaters vary inversely with changes in interest rates. Inverse floaters pay higher interest (and therefore generally increase in value) when interest rates decline, and vice versa. An inverse floater may exhibit greater price volatility than a fixed rate obligation of similar credit quality.

The fund may invest in sovereign debt, including emerging market sovereign debt. Sovereign debt securities may include:

In a repurchase agreement, the fund purchases securities from a counterparty, upon the agreement of the counterparty to repurchase the securities from the fund at a later date, and at a specified price, which is typically higher than the purchase price paid by the fund. The securities purchased serve as the fund’s collateral for the obligation of the counterparty to repurchase the securities. If the counterparty does not repurchase the securities, the fund is entitled to sell the securities, but the fund may not be able to sell them for the price at which they were purchased, thus causing a loss. Additionally, if the counterparty becomes insolvent, there is some risk that the fund will not have a right to the securities, or the immediate right to sell the securities.

The fund may enter into borrowing transactions. Borrowing may make the value of an investment in the fund more volatile and increase the fund’s overall investment exposure. The fund may be required to liquidate portfolio securities at a time when it would be disadvantageous to do so in order to make payments with respect to any borrowings. Interest on any borrowings will be a fund expense and will reduce the value of the fund’s shares.

The fund may enter into reverse repurchase agreements, which have characteristics like borrowings. In a reverse repurchase agreement, the fund sells securities to a counterparty, in return for cash, and the fund agrees to repurchase the securities at a later date and for a higher price, representing the cost to the fund for the cash received.

When-issued securities, delayed delivery, to be announced and forward commitment transactions

Municipal securities include debt obligations issued by any of the 50 U.S. states and the District of Columbia or their political subdivisions, agencies and public authorities, certain other U.S. governmental issuers (such as Puerto Rico, the U.S. Virgin Islands and Guam) and other qualifying issuers, participation or other interests in these securities and other structured securities. Although municipal securities are issued by qualifying issuers, payments of principal and interest on municipal securities may be derived solely from revenues from certain facilities, mortgages or private industries, and may not be backed by the issuers themselves. These securities include participation or other interests in municipal securities issued or backed by banks, insurance companies and other financial institutions.

Municipal securities include general obligation bonds, revenue bonds, housing authority bonds, private activity bonds, industrial development bonds, residual interest bonds, tender option bonds, tax and revenue anticipation notes, bond anticipation notes, tax-exempt commercial paper, municipal leases, participation certificates and custodial receipts. General obligation bonds are backed by the full faith and credit of the issuing entity. Revenue bonds are typically used to fund public works projects, such as toll roads, airports and transportation facilities, that are expected to produce income sufficient to make the payments on the bonds, since they are not backed by the full taxing power of the municipality. Housing authority bonds are used primarily to fund low to middle income residential projects and may be backed by the payments made on the underlying mortgages. Tax and revenue anticipation notes are generally issued in order to finance short-term cash needs or, occasionally, to finance construction. Tax and revenue anticipation notes are expected to be repaid from taxes or designated revenues in the related fiscal period, and they may or may not be general obligations of the issuing entity. Bond anticipation notes are issued with the expectation that their principal and interest will be paid out of proceeds from renewal notes or bonds and may be issued to finance such items as land acquisition, facility acquisition and/or construction and capital improvement projects.

Municipal securities include municipal lease obligations, which are undivided interests issued by a state or municipality in a lease or installment purchase contract which generally relates to equipment or facilities. In some cases, payments under municipal leases do not have to be made unless money is specifically approved for that purpose by an appropriate legislative body.

obligations, the fund may obtain a new or restructured security or underlying assets. In that case, the fund may become the holder of securities or other assets that it could not purchase or might not otherwise hold (for example, because they are of lower quality or are subordinated to other obligations of the issuer) at a time when those assets may be difficult to sell or can be sold only at a loss. In addition, the fund may incur expenses in an effort to protect the fund’s interest in securities experiencing these events.

The fund may depart from its principal investment strategies in response to adverse market, economic or political conditions by taking temporary defensive positions, including by investing in any type of money market instruments and short-term debt securities or holding cash without regard to any percentage limitations. Although the subadviser has the ability to take defensive positions, it may choose not to do so for a variety of reasons, even during volatile market conditions.

The portfolio managers follow a value approach to investing and therefore seek to identify relative value in the global bond markets. The portfolio managers define as undervalued those markets where they believe real interest rates are high and the currency is undervalued with the potential to appreciate. The portfolio managers will focus investments in those undervalued markets where they believe cyclical business conditions as well as secular economic and political trends provide the best opportunity for declining interest rates and a return to lower real rates over time. The portfolio managers believe that such economic conditions provide the best potential to achieve capital appreciation. The fund employs a top-down, value-oriented, and macro driven investment approach and incorporates analysis of material environmental, social and governance (ESG) issues that may impact an investment’s risk profile and performance.

Following is more information on the principal risks summarized above and additional risks of investing in the fund.

Foreign investments and emerging markets risk. The fund’s investments in securities of foreign issuers or issuers with significant exposure to foreign markets involve additional risk as compared to investments in U.S. securities or issuers with predominantly domestic exposure, such as less liquid, less regulated, less transparent and more volatile markets. The markets for some foreign securities are relatively new, and the rules and policies relating to these markets are not fully developed and may change. The value of the fund’s investments may decline because of factors affecting the particular issuer as well as foreign markets and issuers generally, such as unfavorable or unsuccessful government actions, tariffs and tax disputes, reduction of government or central bank support, inadequate accounting standards, lack of information and political, economic, financial or social instability. Foreign investments may also be adversely affected by U.S. government or international economic sanctions, which could eliminate the value of an investment. To the extent the fund focuses its investments in a single country or only a few countries in a particular geographic region, economic, political, regulatory or other conditions affecting such country or region may have a greater impact on fund performance relative to a more geographically diversified fund.

policies may change from time to time. Those changes may not lead to the results intended by the subadviser and could have an adverse effect on the value or performance of the fund.

Risks relating to investments in municipal securities. Issuers of municipal securities tend to derive a significant portion of their revenue from taxes, particularly property and income taxes, and decreases in personal income levels and property values and other unfavorable economic factors, such as a general economic recession, adversely affect municipal securities. Municipal issuers may also be adversely affected by rising health care costs, increasing unfunded pension liabilities and by the phasing out of U.S. federal programs providing financial support. Where municipal securities are issued to finance particular projects, such as those relating to education, health care, transportation, and utilities, issuers often depend on revenues from those projects to make principal and interest payments. Adverse conditions and developments in those sectors can result in lower revenues to issuers of municipal securities, potentially resulting in defaults, and can also have an adverse effect on the broader municipal securities market.

There may be less public information available on municipal issuers or projects than other issuers, and valuing municipal securities may be more difficult. In addition, the secondary market for municipal securities is less well developed and may have lower liquidity as compared to other markets, and dealers may be less willing to offer and sell municipal securities in times of market turbulence. Changes in the financial condition of one or more individual municipal issuers (or one or more insurers of municipal issuers), or one or more defaults by municipal issuers or insurers, can adversely affect liquidity and valuations in the overall market for municipal securities. The value of municipal securities can also be adversely affected by regulatory and political developments affecting the ability of municipal issuers to pay interest or repay principal, actual or anticipated tax law changes or other legislative actions, and by uncertainties and public perceptions concerning these and other factors. In the past, a number of municipal issuers have defaulted on obligations, were downgraded or commenced insolvency proceedings. Financial difficulties of municipal issuers may experience a resurgence, particularly in the event of economic or market turmoil or a recession.

Portfolio turnover risk. Active and frequent trading may increase a shareholder’s tax liability and the fund’s transaction costs, which could detract from fund performance.

Conversely, when market interest rates decline, while the value of mortgage-backed securities may increase, the rates of prepayment of the underlying mortgages tend to increase, which shortens the effective duration of these securities. Mortgage-backed securities are also subject to the risk that underlying borrowers will be unable to meet their obligations.

Borrowing risk. Certain borrowings may create an opportunity for increased return but, at the same time, create special risks. For example, if the fund invests the proceeds of the borrowing, it will have a leveraging effect on its portfolio, the value of the fund will be more volatile and all other risks tend to be compounded. This is because leverage generally magnifies the effect of any increase or decrease in the value of the fund’s underlying assets or creates investment risk with respect to a larger pool of assets than the fund would otherwise have. The fund may be required to liquidate fund securities at a time when it would be disadvantageous to do so in order to make payments with respect to any borrowing. Interest on any borrowing will be a fund expense and will reduce the value of the fund’s shares.

interest rate movement, the investment performance of the fund would be less than what it would have been if the fund had not entered into the interest rate swap.

The absence of a central exchange or market for over-the-counter swap transactions may lead, in some instances, to difficulties in trading and valuation, especially in the event of market disruptions. Recent legislation requires certain swaps to be executed through a centralized exchange or regulated facility and be cleared through a regulated clearinghouse. Although this clearing mechanism is generally expected to reduce counterparty credit risk, it may disrupt or limit the swap market and may not result in swaps being easier to trade or value. As swaps become more standardized, the fund may not be able to enter into swaps that meet its investment needs. The fund also may not be able to find a clearinghouse willing to accept a swap for clearing. In a cleared swap, a central clearing organization will be the counterparty to the transaction. The fund will assume the risk that the clearinghouse may be unable to perform its obligations.

Currency derivatives risk. The fund’s use of currency futures, forwards or options, whether for hedging or speculative purposes, may not always work as intended, and in specific cases the fund may be worse off than if it had not used a hedging instrument. Currency derivatives involve similar risks as other derivatives, including credit, counterparty, leverage and illiquidity risk. There may not always be suitable hedging instruments available. Even where suitable hedging instruments are available, the portfolio managers may determine not to hedge the fund’s currency risks.

Hedging risk. The decision as to whether and to what extent the fund will engage in hedging transactions to hedge against such risks as credit risk, currency risk and interest rate risk will depend on a number of factors, including prevailing market conditions, the composition of the fund and the availability of suitable transactions. Hedges are sometimes subject to imperfect matching between the derivative and the underlying asset or index; accordingly, there can be no assurance that the fund will engage in hedging transactions at any given time or from time to time, even under volatile market environments, or that any such strategies, if used, will be successful. Hedging transactions involve costs and may reduce gains or result in losses.

In addition to the policies described elsewhere in this Prospectus, the fund may from time to time attempt to hedge a portion of its currency risk using a variety of techniques, including currency futures (and options thereon), forwards, and options. However, these instruments may not always work as intended, and in certain cases the fund may be worse off than if it had not used a hedging instrument. For most emerging market currencies, there are not suitable hedging instruments available.

Primary responsibility for the day-to-day management of the fund lies with the following portfolio managers.

The SAI provides information about the compensation of the portfolio managers, other accounts managed by the portfolio managers and any fund shares held by the portfolio managers.

The fund pays a management fee at an annual rate of 0.50% of its average daily net assets.

For the fiscal year ended December 31, 2019, the fund paid LMPFA an effective management fee of 0.50%, inclusive of fees recaptured pursuant to the fund’s expense limitation arrangements, of the fund’s average daily net assets for management services.

The manager has agreed to waive fees and/or reimburse operating expenses (other than interest, brokerage commissions, dividend expense on short sales, taxes, extraordinary expenses and acquired fund fees and expenses) so that the ratio of total annual fund operating expenses will not exceed 1.00% for Class A shares, 1.20% for Class A2 shares, 1.75% for Class C shares, 1.45% for Class C1 shares, 1.00% for Class FI shares, 1.25% for Class R shares, 0.75% for Class I shares and 0.65% for Class IS shares, subject to recapture as described below. In addition, the ratio of total annual fund operating expenses for Class IS shares will not exceed the ratio of total annual fund operating expenses for Class I shares, subject to recapture as described below. These arrangements are expected to continue until December 31, 2021, may be terminated prior to that date by agreement of the manager and the Board, and may be terminated at any time after that date by the manager. These arrangements, however, may be modified by the manager to decrease total annual fund operating expenses at any time. The manager is also permitted to recapture amounts waived and/or reimbursed to a class within three years after the fiscal year in which the manager earned the fee or incurred the expense if the class’ total annual fund operating expenses have fallen to a level below the limit described above. In no case will the manager recapture any amount that would result, on any particular business day of the fund, in the class’ total annual fund operating expenses exceeding the applicable limits described above or any other lower limit then in effect.

Legg Mason Investor Services, LLC (“LMIS”), a wholly-owned broker/dealer subsidiary of Legg Mason, serves as the fund’s sole and exclusive distributor.

The fund has adopted a shareholder services and distribution plan pursuant to Rule 12b-1 under the Investment Company Act of 1940, as amended. Under the plan, the fund pays distribution and/or service fees based on an annualized percentage of average daily net assets of up to 0.25% for Class A shares; up to 0.25% for Class A2 shares; up to 1.00% for Class C shares; up to 0.70% for Class C1 shares; up to 0.25% for Class FI shares and up to 0.50% for Class R shares. Payments by the fund under its plan go to LMIS, financial intermediaries and other parties that provide services in connection with or are otherwise involved in the distribution of its shares or administration of plans or programs that use its shares as their funding medium, and to reimburse certain other expenses and payments. From time to time, LMIS and/or financial intermediaries may agree to a reduction or waiver of these fees. These fees are an ongoing expense and, over time, will increase the cost of your investment and may cost you more than other types of sales charges. Class I shares and Class IS shares are not subject to distribution and/or service fees under the plan.

Individual investors can generally invest in Class A, Class A2 and Class C shares. Class C shares are not available for purchase through accounts where LMIS is the broker-dealer of record (“LMIS Accounts”). Individual investors who invest directly with the fund and who meet the $1,000,000 minimum initial investment requirement may purchase Class I shares. Retirement Plans and Institutional Investors and Clients of Eligible Financial Intermediaries should refer to “Retirement and Institutional Investors—eligible investors” below for a description of the classes available to them.

Each class has different sales charges and expenses, allowing you to choose a class that may be appropriate for you.

Your Service Agent may not offer all classes of shares. You should contact your Service Agent for further information.

The following table compares key features of the fund’s classes. You should also review the fee table and example at the front of this Prospectus carefully before choosing your share class. Your Service Agent can help you choose a class that may be appropriate for you. Please contact your Service Agent regarding the availability of Class FI, Class R or Class IS shares or, if you plan to purchase shares through the fund, contact the fund. You may be required to provide appropriate documentation confirming your eligibility to invest in these share classes. Your Service Agent may receive different compensation depending upon which class you choose. For more information please see the appendix located at the end of this Prospectus titled “Appendix: Waivers and Discounts Available from Certain Service Agents.”

with the dollar amount of your next purchase of Class A or Class A2 shares for purposes of calculating the initial sales charges.

Certain trustees and other fiduciaries may be entitled to combine accounts in determining their sales charge.

Shares of money market funds sold by the distributor may be combined for purposes of the letter of intent. Please contact your Service Agent for additional information.

If you do not meet your asset goal amount, shares in the amount of any sales charges due, based on the amount of your actual purchases, will be redeemed from your account.

Class A and Class A2 initial sales charges are waived for certain types of investors, including:

Class C1 shares are not available for purchase by new or existing investors (except for certain retirement plan programs authorized by LMIS prior to August 1, 2012). Class C1 shares are available for dividend reinvestment and incoming exchanges of Class C1 shares from other funds sold by the distributor. You buy Class C1 shares at net asset value with no initial sales charge. However, if you redeem your Class C1 shares within one year of purchase, you will pay a contingent deferred sales charge of 1.00%. However, if you exchange Class C1 shares that were not subject to a contingent deferred sales charge when initially purchased for Class C1 shares of a fund that imposes a contingent deferred sales charge, your contingent deferred sales charge will be measured from the date of your exchange.

LMIS will retain the contingent deferred sales charges and an annual distribution and/or service fee of up to 0.70% of the average daily net assets represented by the Class C1 shares serviced by these Service Agents until the thirteenth month after purchase. Starting in the thirteenth month after purchase, these Service Agents will receive an annual distribution and/or service fee of up to 0.70% of the average daily net assets represented by the Class C1 shares serviced by them.

Effective April 15, 2019, except as noted below, Class C and Class C1 shares automatically convert to Class A shares after the shares have been held for 10 years from the purchase date; the shares will be converted on the next monthly conversion processing date after the 10 year anniversary of purchase (generally, on the fifteenth of the month, or the next business day if the fifteenth is not a business day). The initial Class C and Class C1

share conversion occurred on April 15, 2019, when Class C and Class C1 shares purchased on or prior to April 15, 2009 converted to Class A shares, except as noted below. It is the responsibility of your Service Agent and not the fund or LMIS to ensure that you are credited with the proper holding period. If your Service Agent does not have records verifying that your shares have been held for at least 10 years, your Service Agent may not convert your Class C or Class C1 shares to Class A shares. Group retirement plans held in an omnibus recordkeeping platform through a Service Agent that does not track participant-level share lot aging may not convert Class C or Class C1 shares to Class A shares. Customers of certain Service Agents may be subject to different terms or conditions, as set by their Service Agent, in connection with such conversions. Please refer to the appendix titled “Appendix: Waivers and Discounts Available from Certain Service Agents” on page A-1 of this Prospectus or contact your Service Agent for more information.

For Class C and Class C1 shares that have been acquired through an exchange from another fund sold by LMIS, the purchase date is calculated from the date the shares were originally acquired in the other fund. When Class C and Class C1 shares that a shareholder acquired through a purchase or exchange convert, any other Class C and Class C1 shares that the shareholder acquired as reinvested dividends and distributions related to those shares also will convert into Class A shares on a pro rata basis.

All conversions from Class C or Class C1 shares to Class A shares will be based on the per share net asset value without the imposition of any sales load, fee or other charge. The conversion from Class C or Class C1 shares to Class A shares is not considered a taxable event for federal income tax purposes.

You buy Class FI shares at net asset value with no initial sales charge and no contingent deferred sales charge when redeemed. Class FI shares are not available for purchase through LMIS Accounts.

Service Agents receive an annual distribution and/or service fee of up to 0.25% of the average daily net assets represented by the Class FI shares serviced by them.

You buy Class R shares at net asset value with no initial sales charge and no contingent deferred sales charge when redeemed.

Service Agents receive an annual distribution and/or service fee of up to 0.50% of the average daily net assets represented by the Class R shares serviced by them.

The distributor receives contingent deferred sales charges as partial compensation for its expenses in selling shares, including the payment of compensation to your Service Agent.

The contingent deferred sales charge for each share class will generally be waived:

To have your contingent deferred sales charge waived, you or your Service Agent must let the fund know at the time you redeem shares that you qualify for such a waiver.

Retirement Plans with omnibus accounts held on the books of the fund can generally invest in Class A, Class A2, Class C, Class FI, Class R, Class I and Class IS shares. Certain Retirement Plan programs authorized by LMIS prior to August 1, 2012 can also invest in Class C1 shares.

Other Retirement Plan investors and individual retirement vehicles can generally invest in Class A, Class A2, Class C and Class I shares.

“Clients of Eligible Financial Intermediaries” are investors who invest in the fund through Service Agents that (i) charge such investors an ongoing fee for advisory, investment, consulting or similar services, or (ii) have entered into an agreement with the distributor to offer Class A, Class A2, Class FI, Class R, Class I or Class IS shares through a no-load network or platform (“Eligible Investment Programs”). Such investors may include investors who invest in the fund through the program of a Service Agent where the investor typically invests $10 million or more in assets under management in accounts with the Service Agent (“Management Accounts”). Such investors may also include pension and profit sharing plans, other employee benefit trusts, endowments, foundations and corporations. Eligible Investment Programs may also include college savings vehicles such as Section 529 plans and direct retail investment platforms through mutual fund “supermarkets,” where the sponsor links its client’s account (including IRA accounts on such platforms) to a master account in the sponsor’s name. The Service Agent may impose separate investment minimums.

Clients of Eligible Financial Intermediaries may generally invest in Class A, Class A2, Class FI, Class R, Class I or Class IS shares. Class I and Class IS shares are available for exchange from Class A, Class A2, Class C1 or Class C shares of the fund by participants in Eligible Investment Programs.

Certain Retirement Plan programs authorized by LMIS prior to August 1, 2012 may buy Class C1 shares at net asset value without paying a contingent deferred sales charge. LMIS does not pay Service Agents selling Class C1 shares through such programs a commission on the purchase price of Class C1 shares sold by them. Instead, immediately after purchase, LMIS may pay these Service Agents an annual distribution and/or service fee of up to 0.70% of the average daily net assets represented by the Class C1 shares serviced by them.

Certain Retirement Plan programs with exchange features in effect prior to November 20, 2006, as approved by LMIS, remain eligible for exchange from Class C1 shares to Class A shares in accordance with the program terms. Please see the SAI for more details.

Class FI shares are offered only to Clients of Eligible Financial Intermediaries and Retirement Plans.

Certain waivers of these requirements for individuals associated with the fund, Legg Mason or its affiliates are discussed in the SAI.

Investors who qualify as Clients of Eligible Financial Intermediaries or who participate in Eligible Investment Programs made available through their Service Agents (such as investors in fee-based advisory or mutual fund “wrap” programs) are eligible to purchase, directly or via exchange, Class IS shares, among other share classes. In such cases your ability to hold Class IS shares may be premised on your continuing participation in a fee-based advisory or mutual fund wrap program.

Your Service Agent may not offer all share classes. Please contact your Service Agent for additional details.

When you buy, exchange or redeem shares, your request must be in good order. This means you have provided the following information, without which your request may not be processed:

To be in good order, your redemption request must include a Medallion signature guarantee if you:

For other types of transactions involving changes to your account registration information, please contact the fund or your Service Agent.

For further information, you or your Service Agent may contact the fund at 1-877-721-1926 or 1-203-703-6002.

The small account fee will not be charged on, if applicable: (i) Retirement Plans (but will be charged on other plans that are not employer-sponsored such as traditional and Roth individual retirement accounts, Coverdell education savings accounts, individual 403(b)(7) custodial accounts, Keogh plans, SEPs, SARSEPs, SIMPLE IRAs or similar accounts); (ii) Legg Mason funds that have been closed to subsequent purchases for all classes; (iii) accounts that do not have a valid address as evidenced by mail being returned to the fund or its agents; (iv) Class FI, Class R, Class I and Class IS shares; and (v) for new accounts (except for new accounts opened by way of an exchange), a small account fee will not be charged during the calendar quarter in which you open your account.

The small account fee is calculated on a fund-by-fund basis. If you have accounts in multiple funds, they will not be aggregated for the purpose of calculating the small account fee.

Some shareholders who hold accounts in Classes A, C and C1 of the same fund may have those accounts aggregated for the purposes of these calculations. Please contact the fund or your Service Agent for more information.

Subject to applicable law, the fund may, with prior notice, adopt other policies from time to time requiring mandatory redemption of shares in certain circumstances.

For more information, please contact your Service Agent or the fund or consult the SAI.

To assist you in the management of your account you may direct the transfer agent to send copies of your confirmations and/or periodic statements to another party whom you designate, at no charge.

If you hold Class A, Class A2, Class C1 or Class C shares directly with the fund, you may instruct the fund to have your dividends and/or distributions invested in the corresponding class of shares (or if Class C1 shares are not available, Class C shares) of another fund sold by the distributor, subject to the following conditions:

To change those instructions, you must notify your Service Agent or the fund at least three days before the next distribution is to be paid.

Please contact your Service Agent or the fund to discuss what options are available to you for receiving your dividends and other distributions.

The Board reserves the right to revise the dividend policy or postpone the payment of dividends, if warranted in the Board’s judgment, due to unusual circumstances.

The following table summarizes the tax status of certain transactions related to the fund.

Distributions attributable to short-term capital gains are taxable to you as ordinary income. The fund does not expect any distributions to be treated as qualified dividend income, which for noncorporate shareholders may be taxable at reduced rates. Distributions of net capital gain reported by the fund as capital gain dividends are taxable to you as long-term capital gain regardless of how long you have owned your shares. Noncorporate shareholders ordinarily pay tax at reduced rates on long-term capital gain.

A dividend declared by the fund in October, November or December and paid during January of the following year will, in certain circumstances, be treated as paid in December for tax purposes.

The financial highlights tables are intended to help you understand the performance of each class for the past five years, unless otherwise noted. Certain information reflects financial results for a single fund share. Total return represents the rate that an investor would have earned (or lost) on an investment in the fund, assuming reinvestment of all dividends and other distributions. Unless otherwise noted, this information has been audited by the fund’s independent registered public accounting firm, PricewaterhouseCoopers LLP, whose report, along with the fund’s financial statements, is incorporated by reference into the fund’s SAI (see back cover) and is included in the fund’s annual report. The fund’s annual report is available upon request by calling toll-free 1-877-721-1926 or via the following hyperlink: (https://www.sec.gov/Archives/edgar/data/1474103/000119312520054878/d55551dncsr.htm).