Summary prospectus

Alternative / specialty mutual fund

Delaware Global Listed Real Assets Fund

February 25, 2022

What is the Fund’s investment objective?

Delaware Global Listed Real Assets Fund seeks total return, which is targeted to be in excess of inflation, through growth of capital and current income.

What are the Fund’s fees and expenses?

The table below 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 $50,000 in Delaware Funds by Macquarie​®. More information about these and other discounts is available from your financial intermediary, in the Fund’s Prospectus under the section entitled “About your account,” and in the Fund’s statement of additional information (SAI) under the section entitled “Purchasing Shares.”

Shareholder fees (fees paid directly from your investment)

Annual fund operating expenses (expenses that you pay each year as a percentage of the value of your investment)

Example

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 that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. In addition, the example shows expenses for Class C shares, assuming those shares were not redeemed at the end of those periods. The example also assumes that your investment has a 5% return each year and reflects the Manager’s expense waivers and reimbursements for the 1-year contractual period and the total operating expenses without waivers for years 2 through 10. 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 Fund shares are held in a taxable account. These costs, which are not reflected in the 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 60% of the average value of its portfolio.

What are the Fund’s principal investment strategies?

The Fund seeks to achieve its investment objective by investing in listed real assets securities, which includes the following categories:

See the section of the Prospectus entitled “Our principal investment strategies” for a description of Real Estate Securities, Infrastructure Securities, Natural Resources Securities, and Inflation-Linked Securities.

Under normal market conditions, the Fund will invest at least 80% of its net assets, plus the amount of any borrowings for investment purposes, in Real Assets Securities (80% policy). The Fund will invest at least 30% of its net assets in foreign securities, including emerging markets issuers. The Fund may purchase both equity and fixed income securities. The Fund may invest in securities of companies or issuers of any size market capitalization.

The Fund will allocate strategy assets across multiple sleeves that will invest in liquid, listed real assets securities that are both tangible and intangible. Sleeves include global listed infrastructure which consists of

listed infrastructure equity securities, global real estate which consists of listed real estate securities including REITs, global natural resources which consists of listed natural resource equity securities, global inflation-linked fixed income which consists of Treasury inflation-protected securities (TIPS) and developed market inflation-linked fixed income securities, and real assets fixed income which consist of high yield and securitized fixed income securities.

The Fund invests in natural resources including precious metals, among other resources. In addition to derivatives, the Fund may gain exposure to precious metals through equity securities of precious metals companies as well as ETFs.

The Fund may invest in commercial mortgage-backed securities, non-agency residential mortgages, and select asset-backed securities. Such securities and mortgages are anticipated to be investment grade.

Within the fixed income securities in which the Fund invests, the structured products will typically have an average credit rating of BBB- and an average duration of seven years. The Fund may also invest in high yield (junk) bonds. The corporate bond securities will typically be below investment grade with an average duration of approximately five years.

The Fund may employ leverage, such as by entering into reverse repurchase transactions, to attempt to take advantage of or increase the total return of attractive investment opportunities.

The Fund may invest in securities of foreign companies or governments or supranational entities to achieve its investment objectives.

The Fund will invest no more than 15% of the portfolio’s holdings in MLPs. The MLPs in which the Fund invests will not include general partnership interests.

Macquarie Investment Management Austria Kapitalanlage AG (MIMAK), the Fund's sub- advisor, uses a dynamic asset-allocation framework to determine the proportion of the Fund’s assets that will be allocated to the various asset classes noted above, based on the market assessment and portfolio risk contribution for such asset classes. The framework is intended to reduce riskier assets in times of market volatility and provide additional downside protection. In connection with its dynamic asset-allocation framework, MIMAK will also manage a tactical / completion sleeve and such sleeve will typically vary from 0% to 20% of the Fund’s total assets and primarily hold derivatives and exchange-traded funds (ETFs). If applicable, the derivatives and ETFs within the tactical / completion sleeve will also be counted towards the asset classes noted above.

The Fund may use a wide range of derivative instruments, typically including forward foreign currency contracts, options, futures contracts, options on futures contracts, and credit default swaps. The Fund will use derivatives for both hedging and non-hedging purposes; as a substitute for purchasing or selling securities; and to manage the Fund’s portfolio characteristics. For example, the Fund may invest in: futures and options to manage duration and for defensive purposes, such as to protect gains or hedge against potential losses in the portfolio without actually selling a security, or to stay fully invested; forward foreign currency contracts to manage foreign currency exposure; and credit default swaps to hedge against a credit event, to gain exposure to certain securities or markets, or to enhance total return.

In addition, the Manager may seek investment advice and recommendations relating to fixed income securities from its affiliates: Macquarie Investment Management Europe Limited (MIMEL), and Macquarie Investment Management Global Limited (MIMGL). The Manager may also permit MIMGL, and Macquarie

Funds Management Hong Kong Limited (MFMHKL) to execute Fund equity security trades on behalf of the Manager. The Manager may also permit MIMEL and MIMGL to exercise investment discretion and perform trading for fixed income securities in certain markets where the Manager believes it will be beneficial to utilize MIMEL’s or MIMGL’s specialized market knowledge, and the Manager may also seek quantitative support from MIMGL. MIMGL is also responsible for managing real estate investment trust securities and other equity asset classes to which the portfolio managers may allocate assets from time to time.

The Fund’s 80% policy is nonfundamental and may be changed without shareholder approval. Fund shareholders would be given at least 60 days’ notice prior to any such change.

What are the principal risks of investing in the Fund?

Investing in any mutual fund involves the risk that you may lose part or all of the money you invest. Over time, the value of your investment in the Fund will increase and decrease according to changes in the value of the securities in the Fund’s portfolio. An investment in the Fund may not be appropriate for all investors. The Fund’s principal risks include:

Market risk — The risk that all or a majority of the securities in a certain market — such as the stock or bond market — will decline in value because of factors such as adverse political or economic conditions, future expectations, investor confidence, or heavy institutional selling.

Real assets industries risk — The risk that the value of a fund’s shares will be affected by factors particular to Real Assets Securities and related industries or sectors (such as government regulation) and may fluctuate more widely than that of a fund that invests in a broad range of industries.

Real estate industry risk — This risk includes, among others: possible declines in the value of real estate; risks related to general and local economic conditions; possible lack of availability of mortgage funds; overbuilding; extended vacancies of properties; increases in competition, property taxes, and operating expenses; changes in zoning laws; costs resulting from the cleanup of, and liability to third parties resulting from, environmental problems; casualty for condemnation losses; uninsured damages from floods, earthquakes, or other natural disasters; limitations on and variations in rents; and changes in interest rates.

Commodity-related investments risk — The value of commodities investments will generally be affected by overall market movements and factors specific to a particular industry or commodity, which may include weather, embargoes, tariffs, and economic health, political, international regulatory and other developments. Exposure to the commodities markets may subject the Fund to greater volatility than investments in traditional securities. The investment team does not plan to always implement exposure to commodities in the Fund, however they will consider holding commodity ETFs in market scenarios where inflation is running higher than normal and their asset allocation model signals for additional commodity exposure. In addition, the Fund may use futures and options on commodities for a variety of purposes such as hedging against adverse changes in the market prices of securities, as a substitute for purchasing or selling securities, to increase the Fund’s return as a non-hedging strategy that may be considered speculative and to manage the Fund’s portfolio characteristics.

Currency risk — The risk that fluctuations in exchange rates between the US dollar and foreign currencies and between various foreign currencies may cause the value of an investment to decline.

Forward foreign currency risk — The use of forward foreign currency contracts may substantially change a fund’s exposure to currency exchange rates and could result in losses to a fund if currencies do not perform as the portfolio manager expects. The use of these investments as a hedging technique to reduce a fund’s exposure to currency risks may also reduce its ability to benefit from favorable changes in currency exchange rates.

Gold and other precious metals risk — Investments related to gold and other precious metals are considered speculative and are affected by a variety of worldwide economic, financial and political factors. The price of gold and other precious metals may fluctuate sharply over short periods of time due to changes in inflation or expectations regarding inflation in various countries, the availability of supplies of gold and other precious metals, changes in industrial and commercial demand, gold and other precious metals sales by governments, central banks or international agencies, investment speculation, monetary and other economic policies of various governments and government restrictions on private ownership of gold and other precious metals.

Infrastructure risk — Infrastructure companies may be subject to a variety of factors that may adversely affect their business or operations, including high interest costs in connection with capital construction programs, high leverage, costs associated with environmental and other regulations, the effects of economic slowdown, surplus capacity, increased competition from other providers of services, uncertainties concerning the availability of fuel at reasonable prices, the effects of energy conservation policies and other factors. Some of the specific risks that infrastructure companies may be particularly affected by, or subject to, include the following: regulatory risk, technology risk, regional or geographic risk, natural disasters risk, through-put risk, project risk, strategic asset risk, operation risk, customer risk, interest rate risk, inflation risk and financing risk. Other factors that may affect the operations of infrastructure companies include difficulty in raising capital in adequate amounts on reasonable terms in periods of high inflation and unsettled capital markets, inexperience with and potential losses resulting from a developing deregulatory environment, increased susceptibility to terrorist acts or political actions, and general changes in market sentiment towards infrastructure assets. In addition, the change in presidential administration could significantly impact the regulation of United States financial markets and dramatically alter existing trade, tax, energy and infrastructure policies, among others. It is not possible to predict what, if any, changes will be made or their potential effect on the economy, securities markets, or financial stability of the United States, or on the energy, natural resources, infrastructure and other markets.

Derivatives risk — Derivatives contracts, such as futures, forward foreign currency contracts, options, and swaps, may involve additional expenses (such as the payment of premiums) and are subject to significant loss if a security, index, reference rate, or other asset or market factor to which a derivatives contract is associated, moves in the opposite direction from what the portfolio manager anticipated. When used for hedging, the change in value of the derivatives instrument may also not correlate specifically with the currency, rate, or other risk being hedged, in which case a fund may not realize the intended benefits. Derivatives contracts are also subject to the risk that the counterparty may fail to perform its obligations under the contract due to, among other reasons, financial difficulties (such as a bankruptcy or reorganization).

Exchange-traded fund risk — The risks of investing in an ETF typically reflect the risks of the types of instruments in which the ETF invests. Because ETFs are investment companies, a fund will bear its proportionate share of the fees and expenses of an investment in an ETF. As a result, a fund's expenses may be higher and performance may be lower.

Interest rate risk — The risk that securities will decrease in value if interest rates rise. The risk is generally associated with bonds; however, because small- and medium-sized companies and companies in the real estate sector often borrow money to finance their operations, they may be adversely affected by rising interest rates. A fund may be subject to a greater risk of rising interest rates due to the current period of historically low interest rates.

Foreign and emerging markets risk — The risk that international investing (particularly in emerging markets) may be adversely affected by political instability; changes in currency exchange rates; inefficient markets and higher transaction costs; foreign economic conditions; the imposition of economic or trade sanctions; or inadequate or different regulatory and accounting standards. The risk associated with international investing will be greater in emerging markets than in more developed foreign markets because, among other things, emerging markets may have less stable political and economic environments. In addition, there often is substantially less publicly available information about issuers and such information tends to be of a lesser quality. Economic markets and structures tend to be less mature and diverse and the securities markets may also be smaller, less liquid, and subject to greater price volatility.

Foreign government/supranational risk — The risk that a foreign government or government-related issuer may be unable to make timely payments on its external debt obligations.

Prepayment risk — The risk that the principal on a bond that is held by a fund will be prepaid prior to maturity at a time when interest rates are lower than what that bond was paying. A fund may then have to reinvest that money at a lower interest rate.

Liquidity risk — The possibility that investments cannot be readily sold within seven calendar days at approximately the price at which a fund has valued them.

Government and regulatory risk — The risk that governments or regulatory authorities may take actions that could adversely affect various sectors of the securities markets and affect fund performance.

IBOR risk — The risk that changes related to the use of the London Interbank Offered Rate (LIBOR) or similar interbank offered rates (“IBORs,” such as the Euro Overnight Index Average (EONIA)) could have adverse impacts on financial instruments that reference LIBOR or a similar rate. While some instruments may contemplate a scenario where LIBOR or a similar rate is no longer available by providing for an alternative rate setting methodology, not all instruments have such fallback provisions and the effectiveness of replacement rates is uncertain. The abandonment of LIBOR and similar rates could affect the value and liquidity of instruments that reference such rates, especially those that do not have fallback provisions. The use of alternative reference rate products may impact investment strategy performance.

Company size risk — The risk that investments in small- and/or medium-sized companies may be more volatile than those of larger companies because of limited financial resources or dependence on narrow product lines.

Fixed income risk — The risk that bonds may decrease in value if interest rates increase; an issuer may not be able to make principal and interest payments when due; a bond may be prepaid prior to maturity; and, in the case of high yield bonds (“junk bonds”), such bonds may be subject to an increased risk of default, a more limited secondary market than investment grade bonds, and greater price volatility. Interest rate changes are influenced by a number of factors, such as government policy, monetary policy, inflation expectations, and the supply and demand of bonds. Bonds and other fixed income securities with longer

maturities or duration generally are more sensitive to interest rate changes. A fund may be subject to a greater risk of rising interest rates due to the current period of historically low interest rates.

High yield (junk bond) risk — The risk that high yield securities, commonly known as “junk bonds,” are subject to reduced creditworthiness of issuers, increased risk of default, and a more limited and less liquid secondary market. High yield securities may also be subject to greater price volatility and risk of loss of income and principal than are higher-rated securities. High yield bonds are sometimes issued by municipalities that have less financial strength and therefore have less ability to make projected debt payments on the bonds.

Leveraging risk — The risk that certain fund transactions, such as reverse repurchase agreements, short sales, loans of portfolio securities, and the use of when-issued, delayed delivery or forward commitment transactions, or derivatives instruments, may give rise to leverage, causing a fund to be more volatile than if it had not been leveraged, which may result in increased losses to the fund.

Natural resources risk — The market value of Natural Resources Securities may be affected by numerous factors, including events occurring in nature, inflationary pressures and international politics. Because the Fund invests significantly in Natural Resources Securities, there is the risk that the Fund will perform poorly during a downturn in the natural resource sector. For example, events occurring in nature (such as earthquakes or fires in prime natural resource areas) and political events (such as coups, military confrontations or acts of terrorism) can affect the overall supply of a natural resource and the value of companies involved in such natural resource.

MLP risk — The risk related to the Fund’s investment in MLPs. Energy infrastructure MLPs are subject to a variety of industry specific risk factors that may adversely affect their business or operations, including those due to commodity production, volumes, commodity prices, weather conditions, terrorist attacks, etc. They are also subject to significant federal, state and local government regulation. Investment in MLPs may also have tax consequences for shareholders. If the Fund retains its investment until its basis is reduced to zero, subsequent distributions will be taxable at ordinary income rates and shareholders may receive corrected 1099s.

Active trading risk — The risk that active management will increase the expenses of the Fund because of brokerage charges, spreads, or mark-up charges. Active trading could raise transaction costs, thereby lowering the Fund’s returns, and could generate taxes for shareholders on realized investment gains.

Active management and selection risk — The risk that the securities selected by a fund’s management will underperform the markets, the relevant indices, or the securities selected by other funds with similar investment objectives and investment strategies. The securities and sectors selected may vary from the securities and sectors included in the relevant index.

None of the entities noted in this document is an authorized deposit-taking institution for the purposes of the Banking Act 1959 (Commonwealth of Australia) and the obligations of these entities do not represent deposits or other liabilities of Macquarie Bank Limited ABN 46 008 583 542 (Macquarie Bank). Macquarie Bank does not guarantee or otherwise provide assurance in respect of the obligations of these entities. In addition, if this document relates to an investment (a) each investor is subject to investment risk including possible delays in repayment and loss of income and principal invested and (b) none of Macquarie Bank or any other Macquarie Group company guarantees any particular rate of return on or the performance of the investment, nor do they guarantee repayment of capital in respect of the investment.

How has Delaware Global Listed Real Assets Fund performed?

The bar chart and table below provide some indication of the risks of investing in the Fund by showing changes in the Fund’s performance from year to year and by showing how the Fund’s average annual total returns for the 1-, 5-, and 10-year or lifetime periods compare with those of a broad measure of market performance. The Fund’s past performance (before and after taxes) is not necessarily an indication of how it will perform in the future. The returns reflect any expense caps in effect during these periods. The returns would be lower without the expense caps. You may obtain the Fund’s most recently available month-end performance by calling 800 523-1918 or by visiting our website at delawarefunds.com/performance.

Prior to the close of business on August 19, 2019, the Fund invested primarily in securities of companies principally engaged in the real estate industry. Since the close of business on August 19, 2019, the Fund has been repositioned to invest primarily in listed real assets securities (Repositioning). The historical returns prior to that time do not reflect the Repositioning.

Calendar year-by-year total return (Class A)

During the periods illustrated in this bar chart, Class A’s highest quarterly return was 15.17% for the quarter ended March 31, 2019, and its lowest quarterly return was -21.27% for the quarter ended March 31, 2020. The maximum Class A sales charge of 5.75%, which is normally deducted when you purchase shares, is not reflected in the highest/lowest quarterly returns or in the bar chart. If this fee were included, the returns would be less than those shown. The average annual total returns in the table below do include the sales charge.

Average annual total returns for periods ended December 31, 2021

After-tax performance is presented only for Class A shares of the Fund. The after-tax returns for other Fund classes may vary. Actual after-tax returns depend on the investor’s individual tax situation and may differ from the returns shown. After-tax returns are not relevant for shares held in tax-advantaged investment vehicles such as employer-sponsored 401(k) plans and individual retirement accounts (IRAs). The after-tax returns shown are calculated using the highest individual federal marginal income tax rates in effect during the periods presented and do not reflect the impact of state and local taxes.

Who manages the Fund?

Investment manager

Delaware Management Company, a series of Macquarie Investment Management Business Trust (a Delaware statutory trust)

Sub-advisors

Macquarie Investment Management Austria Kapitalanlage AG (MIMAK) serves as sub-advisor for the Fund. MIMAK is primarily responsible for the day-to-day management of the Fund’s portfolio and determines its asset allocation.

Macquarie Funds Management Hong Kong Limited

Macquarie Investment Management Europe Limited

Macquarie Investment Management Global Limited

Purchase and redemption of Fund shares

You may purchase or redeem shares of the Fund on any day that the New York Stock Exchange (NYSE) is open for business (Business Day). Shares may be purchased or redeemed: through your financial intermediary; through the Fund’s website at delawarefunds.com/account-access; by calling 800 523-1918; by regular mail (c/o Delaware Funds by Macquarie​®, P.O. Box 9876, Providence, RI 02940-8076); by overnight courier service (c/o Delaware Funds by Macquarie Service Center, 4400 Computer Drive, Westborough, MA 01581-1722); or by wire.

For Class A and Class C shares, the minimum initial investment is generally $1,000 and subsequent investments can be made for as little as $100. The minimum initial investment for IRAs, Uniform Gifts/Transfers to Minors Act accounts, direct deposit purchase plans, and automatic investment plans is $250 and through Coverdell Education Savings Accounts is $500, and subsequent investments in these accounts can be made for as little as $25. For Class R, Institutional Class, and Class R6 shares (except those shares purchased through an automatic investment plan), there is no minimum initial purchase requirement, but certain eligibility requirements must be met. The eligibility requirements are described in this Prospectus under “Choosing a share class” and on the Fund’s website. We may reduce or waive the minimums or eligibility requirements in certain cases.

Please refer to the Fund’s prospectus and statement of additional information for more details regarding the purchase and sale of Fund shares.

Tax information

The Fund’s distributions generally are taxable to you as ordinary income, capital gains, or some combination of both, unless you are investing through a tax-advantaged arrangement, such as a 401(k) plan or an IRA, in which case your distributions may be taxed as ordinary income when withdrawn from the tax-advantaged account.

Payments to broker/dealers and other financial intermediaries

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

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