Summary Prospectus by Investment Company (Form 497K)

US equity mutual fund

Nomura Mid Cap Growth Fund

(formerly, Macquarie Mid Cap Growth Fund)

July 31, 2026

Before you invest, you may want to review the Fund's statutory prospectus (and any supplements thereto), which contains more information about the Fund and its risks. You can find the Fund's statutory prospectus and other information about the Fund, including its statement of additional information and most recent reports to shareholders, online at nomuraassetmanagement.com/literature. You can also get this information at no cost by calling 800 523-1918. The  Fund's statutory prospectus and statement of additional information, both dated July 31, 2026 (and any supplements thereto), are incorporated by reference into this summary prospectus.

What is the Fund's investment objective?

Nomura Mid Cap Growth Fund seeks to provide growth of capital.

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 Nomura Funds (formerly,   Macquarie Funds). 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)

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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 43% of the average value of its portfolio.

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Summary prospectus
Nomura Mid Cap Growth Fund, a series of Ivy Funds

What are the Fund's principal investment strategies?

Nomura Mid Cap Growth Fund seeks to achieve its objective by investing, under normal circumstances, at least 80% of its net assets, plus the amount of any borrowings for investment purposes, in common stocks of mid-capitalization companies that the Manager believes are high quality and/or offer above-average growth potential ("growth-oriented companies") (80% policy). For purposes of the Fund's 80% policy, mid-capitalization companies are companies with market capitalizations similar to those of issuers included in the Russell  Midcap^® Growth Index over the last 13 months at the time of acquisition. As of June 30, 2026, this range of market capitalizations was between approximately $3.3 billion and $92.6 billion. For purposes of the Fund's 80% policy, growth-oriented companies are those companies included in the Russell Midcap^® Growth Index or companies that exhibit characteristics similar to those companies included in the Russell Midcap^® Growth Index, including but not limited to relatively higher price-to-book ratio or relatively higher earnings growth.

In selecting securities for the Fund, the Manager emphasizes a bottom-up (researching individual issuers) approach and focuses on companies it believes have the potential for strong growth, increasing profitability, stable and sustainable revenue and earnings streams, attractive valuations and sound capital structures. The Manager may look at a number of factors in its consideration of a company, such as: new or innovative products or services; adaptive or creative management; strong financial and operational capabilities to sustain multi-year growth; stable and consistent revenue, earnings, and cash flow; strong balance sheet; market potential; and profit potential. Part of the Manager's investment process also includes a review of the  macroeconomic environment, with a focus on factors such as interest rates, inflation, consumer confidence and corporate spending.

Generally, in determining whether to sell a security, the Manager considers many factors, including what it believes to be excessive valuation given company growth prospects, deterioration of fundamentals, weak cash flow to support shareholder returns, and unexpected and poorly explained management changes. The Manager also may sell a security to reduce the Fund's holding in that security, to take advantage of what it believes are more attractive investment opportunities or to raise cash.

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.

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Growth stock risk - Growth stocks reflect projections of future earnings and revenue. These prices may rise or fall dramatically depending on whether those projections are met. These companies' stock prices may be more volatile, particularly over the short term.

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.

Industrials sector risk - The risk that the value of a fund's shares will be affected by factors particular to the industrials and related sectors (such as government regulation) and may fluctuate more widely than that of a fund that invests in a broad range of sectors.

Information technology sector risk - The risk that investment risks associated with investing in the information technology sector, in addition to other risks, include the intense competition to which information technology companies may be subject; the dramatic and often unpredictable changes in growth rates and competition for qualified personnel among information technology companies; effects on profitability from being heavily dependent on patent and intellectual property rights and the loss or impairment of those rights; obsolescence of existing technology; general economic conditions; and government regulation.

Healthcare sector risk - The risk that the value of a fund's shares will be affected by factors particular to the healthcare and related sectors (such as government regulation) and may fluctuate more widely than that of a fund that invests in a broad range of sectors.

Industry and sector risk - The risk that the value of securities in a particular industry or sector (such as industrials, information technology or healthcare) will decline because of changing expectations for the performance of that industry or sector.

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.

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.

How has Nomura Mid Cap Growth Fund performed?

The bar chart and table below 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 and the table shows how the Fund's average annual total returns for the 1-, 5-, and 10-year periods compare with those of a broad measure of market performance and an additional index with characteristics relevant to the Fund. The Fund's past performance (before and after taxes) is not necessarily an indication of how the Fund 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.

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Summary prospectus
Nomura Mid Cap Growth Fund, a series of Ivy Funds

On April 30, 2021,  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.

You may obtain the Fund's most recently available month-end performance by calling 800 523-1918 or by visiting our website at  nomuraassetmanagement.com/performance.

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

As of June 30, 2026, the Fund's Class A shares had a calendar year-to-date return of 4.99%. During the periods illustrated in this bar chart, Class A's highest quarterly return was 37.07% for the quarter ended June 30, 2020, and its lowest quarterly return was -21.85% for the quarter ended June 30, 2022. 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, 2025

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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 Nomura  Investment Management Business Trust (a Delaware statutory trust)

Employees of the Manager's  affiliates outside the US participate in the management of certain funds as "associated persons" of the Manager  under the Manager's oversight, in accordance with SEC guidance as to "participating affiliate" arrangements. These associated persons may, on behalf of the Manager, provide discretionary investment management services, trading, research and related services directly or indirectly to the Fund.

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 nomuraassetmanagement.com/account-access; by calling 800 523-1918; by regular mail (c/o Nomura  Funds, P.O. Box 534437, Pittsburgh, PA 15253-4437); by overnight courier service (c/o Nomura  Funds, Attention: 534437,  1350 Penn Avenue Suite 102, Pittsburgh, PA 15222); 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,

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Summary prospectus
Nomura Mid Cap Growth Fund, a series of Ivy Funds

Institutional Class, 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.

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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