Summary Prospectus by Investment Company - Form 497K

Alternative / specialty mutual fund

Delaware Ivy Asset Strategy Fund

July 31, 2024

(to be renamed Macquarie Asset Strategy Fund on or about December 31, 2024)

What is the Fund's investment objective?

Delaware Ivy Asset Strategy Fund seeks to provide total return.

What are the Fund's fees and expenses?

The table below describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. 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​® (to be renamed Macquarie Funds on or about December 31, 2024). 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 that the Fund's operating expenses remain the same. 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 54% of the average value of its portfolio.

What are the Fund's principal investment strategies?

Delaware Ivy Asset Strategy Fund seeks to achieve its objective by allocating its assets among different asset classes of varying correlation around the globe. Delaware Management Company (Manager), the Fund's investment manager, primarily invests a portion of the Fund's assets in global equity securities that the Manager believes can outperform the Fund's benchmark index, the MSCI ACWI Index, over a full market cycle before taking into account fund expenses (the Equity portion). The Manager then invests the Fund's remaining assets (the Diversifying portion) in various additional asset classes that may have a lower correlation or volatility than the Equity portion, including but not limited to global fixed-income securities, United States Treasury (Treasury) instruments, precious metals, commodities and cash. The Manager may allocate the Fund's investments among these different asset classes in different proportions at different times, but generally seeks to invest 50%-80% of the Fund's total assets in equities or equity-like securities and 20%-50% of the Fund's total assets in the Diversifying portion. In connection with the active allocation among these different asset classes, Macquarie Investment Management Austria Kapitalanlage AG (MIMAK), the sub-advisor to the Fund, will also manage a tactical/completion sleeve. The tactical/completion 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. MIMAK and the Manager use 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.

For the purposes of this section, a reference to the Manager may also include MIMAK, with respect to its role as sub-advisor of the Fund.

In selecting securities for the Fund, the Manager primarily emphasizes a bottom-up (researching individual issuers) approach and seeks to find relative value across the asset classes noted above. Part of the Manager's investment process also includes a top-down (assessing the market and economic environment) analysis.

With respect to the Equity portion, the Manager seeks what it believes are well-positioned companies with a strong and/or growing sustainable competitive advantage in attractive industries across the globe which the Manager believes can exceed current earnings estimates. The Manager looks for companies that are taking market share within their industries, which results in high levels of cash flow, as well as stable to improving margins and returns. The Manager generally focuses on companies that are growing, innovating, improving margins, returning capital through dividend growth or share buybacks and/or offering what the Manager believes to be sustainable high free cash flow.

The Fund has the flexibility to invest in both growth and value companies. Although the Fund primarily invests in securities issued by large, well-established companies, it may invest in securities issued by companies of any size.

Within the Diversifying portion, the Fund has the flexibility to invest in a wide range of assets that, in the Manager's view, present attractive risk-adjusted returns as compared to the Equity portion, and/or reduce the Fund's overall risk profile. Diversifying assets may be comprised of global fixed-income instruments, including investment-grade and high-yield bonds, as well as emerging market, corporate and sovereign bonds and bank loans. Such fixed-income instruments may include a significant amount, up to 35% of the Fund's total assets, in high-yield/high-risk bonds, or junk bonds, which include bonds rated BB+ or below by S&P Global Ratings, a division of S&P Global, Inc. (S&P), or comparably rated by another nationally recognized statistical rating organization (NRSRO) or, if unrated, determined by the Manager to be of comparable quality. When selecting these instruments, the Manager focuses heavily on free cash flow and an issuer's ability to de-lever itself (in other words, to reduce debt) through the credit cycle. The Fund also can invest in government securities issued by the Treasury (such as Treasury bills, notes or bonds), obligations issued or guaranteed as to principal and interest (but not as to market value) by the US government, its agencies or instrumentalities, international and supranational bonds issued or guaranteed by other governments, and mortgage-backed securities issued or guaranteed by government agencies or government-sponsored enterprises, as well as Treasury inflation-protected securities (TIPs), and cash.

The Fund may use a wide range of derivatives 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.

Within each of the Equity and the Diversifying portions, the Fund may invest in US and foreign securities. The Equity portion of the Fund generally will invest at least 30% of its assets, and may invest up to 75%, in foreign securities and in securities denominated in currencies other than the US dollar, including issuers located in and/or generating revenue from emerging markets. Many of the companies in which the Fund may invest have diverse operations, with products or services in foreign markets. Therefore, the Fund may have indirect exposure to various foreign markets through investments in these companies, even if the Fund is not invested directly in such markets.

The Manager may allocate the Fund's investments among the different types of assets noted above in different proportions at different times (keeping in mind the general percentages noted above) and may exercise a flexible strategy in selecting investments. The Manager does not intend to concentrate the Fund in any geographical region or industry sector; however, it is not limited by investment style or by the issuer's location or industry sector.

Subject to diversification limits, the Fund also may invest up to 10% of its total assets at the time of investment in precious metals.

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 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.

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.

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.

Exchange-traded fund risk - The risks of investing in an ETF typically reflect the risks of the 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.

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 a fund to greater volatility than investments in traditional securities.

Credit risk - The risk that an issuer of a debt security, including a governmental issuer or an entity that insures a bond, may be unable to make interest payments and/or repay principal in a timely manner.

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.

Bank loans and other direct indebtedness risk - The risk that the portfolio will not receive payment of principal, interest, and other amounts due in connection with these investments and will depend primarily on the financial condition of the borrower and the lending institution.

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.

Interest rate risk - The risk that the prices of bonds and other fixed income securities will increase as interest rates fall and decrease as interest rates rise. 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 when interest rates are low or inflation rates are high or rising.

Mortgage-backed and asset-backed securities risk - Mortgage-backed and asset-backed securities, like other fixed income securities, are subject to credit risk and interest rate risk, and may also be subject to prepayment risk and extension risk. Prepayment risk is the risk that the principal on mortgage-backed or asset-backed securities may be prepaid at any time, which will reduce the yield and market value of the securities and may cause the fund to reinvest the proceeds in lower yielding securities. Extension risk is the risk that principal on mortgage-backed or asset-backed securities will be repaid more slowly than expected, which may reduce the proceeds available for reinvestment in higher yielding securities. In addition, mortgage-backed and asset-backed securities may decline in value, become more volatile, face difficulties in valuation, or experience reduced liquidity due to changes in interest rates or general economic conditions. Certain mortgage-backed or asset-backed securities, such as collateralized mortgage obligations, real estate mortgage investment conduits, and stripped mortgage-backed securities, may be more susceptible to these risks than other mortgage-backed, asset-backed, or fixed-income securities.

US government securities risk - The risk that certain US government securities, such as securities issued by Fannie Mae, Freddie Mac and the Federal Home Loan Bank system (FHLB), are not backed by the "faith and credit" of the US government and, instead, may be supported only by the credit of the issuer or by the right of the issuer to borrow from the US Treasury.

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 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).

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 Ivy Asset Strategy 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. On April 30, 2021, the Fund became part of Delaware Funds by Macquarie​® and Delaware Management Company became the Fund's investment manager. The returns shown from before April 30, 2021 are from the Fund's prior investment manager. Effective November 15, 2021, the Fund changed its investment strategy. Performance prior to November 15, 2021 reflects the Fund's former strategy; its performance may have differed if the Fund's current strategy had been in place. 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.

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

As of June 30, 2024, the Fund's Class A shares had a calendar year-to-date return of 10.77%. During the periods illustrated in this bar chart, Class A's highest quarterly return was 17.88% for the quarter ended June 30, 2020, and its lowest quarterly return was -19.74% 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, 2023

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

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 534437, Pittsburgh, PA 15253-4437); by overnight courier service (c/o Delaware Funds by Macquarie Service Center, Attention: 534437, 500 Ross Street, 154-0520, Pittsburgh, PA 15262); 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, Class I, Class Y, 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.