Highland Funds I

10/30/2026 | Press release | Distributed by Public on 10/30/2026 12:04

Summary Prospectus by Investment Company (Form 497K)

NexPoint Funds I

Summary Prospectus

October 31, 2026

NexPoint Credit Catalyst Fund

Class A NEDAX Class C NEDCX Class Z NEDZX

Before you invest, you may want to review the Fund's Statutory Prospectus, which contains more information about the Fund and its risks. You can find the Fund's Statutory Prospectus, Statement of Additional Information and other information about the Fund online at https://www.nexpointassetmgmt.com/resources. You can also get this information at no cost by calling 1-877-665-1287 or by sending an e-mail request to [email protected]. The Fund's Statutory Prospectus and Statement of Additional Information, both dated October 31, 2026, as supplemented, are incorporated by reference into this Summary Prospectus.

Investment Objective

The investment objective of NexPoint Credit Catalyst Fund (the "Credit Catalyst Fund" or the "Fund") is to seek current income and capital appreciation.

Fees and Expenses of the Fund

The following tables describe 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.

You may qualify for sales charge discounts on purchases of Class A Shares if you and your family invest, or agree to invest in the future, at least $50,000 in the Fund. More information about these and other discounts is available from your financial professional and in the "Reduced Sales Charges for Class A Shares" section on page 57 of the Fund's Prospectus and the "Programs for Reducing or Eliminating Sales Charges" section on page 53 of the Fund's Statement of Additional Information. Investors investing in the Fund through an intermediary should consult the Appendix to the Fund's Prospectus, which includes information regarding financial intermediary-specific sales charges and related discount policies that apply to purchases through certain specified intermediaries.

Shareholder Fees (fees paid directly from your investment)

Class A Class C Class Z

Maximum Sales Charge (Load) Imposed On Purchases (as a % of offering price)

5.50% None None

Maximum Sales Charge (Load) Imposed on Reinvested Dividends and other Distributions (as a % of offering price)

None None None

Maximum Deferred Sales Charge (Load) (as a % of the net asset value at the time of purchase or redemption, whichever is lower)

1.00%1 1.00%2 None

Exchange Fee

None None None

Redemption Fee

None None None

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Class A Class C Class Z

Management fee

0.95% 0.95% 0.95%

Distribution and/or Service (12b-1) Fees

0.35% 1.00% None

Other Expenses

2.53% 2.53% 2.53%

Interest Payments and Commitment Fees on Borrowed Funds

0.30% 0.30% 0.30%

Dividend Expense on Short Sales

0.04% 0.04% 0.04%

Remainder of Other Expenses

2.19% 2.19% 2.19%

Total Annual Fund Operating Expenses

3.83% 4.48% 3.48%

Expense Reimbursement3

-1.84% -1.84% -1.84%

Total Annual Fund Operating Expenses After Expense Reimbursement

1.99% 2.64% 1.64%
1

Class A Shares bought without an initial sales charge in accounts aggregating $500,000 or more at the time of purchase are subject to a 1.00% contingent deferred sales charge ("CDSC") if the shares are sold within 18 months of purchase.

2

Class C Shares are subject to a 1% CDSC for redemptions of shares within one year of purchase. This CDSC does not apply to redemptions under a systematic withdrawal plan.

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NexPoint Asset Management, L.P. ("NexPoint" or the "Adviser") has contractually agreed to limit the total annual operating expenses (exclusive of fees paid by the Fund pursuant to its distribution plan under Rule 12b-1 under the Investment Company Act of 1940, as amended (the "1940 Act"), taxes, dividend expenses on short sales, interest payments, brokerage commissions and other transaction costs, acquired fund fees and expenses, and extraordinary expenses (collectively, the "Excluded Expenses")) of the Fund to 1.30% of average daily net assets attributable to any class of the Fund (the "Expense Cap"). The Expense Cap will continue through at least October 31, 2027, and may not be terminated prior to this date without the action or consent of the Fund's Board of Trustees. Under the expense limitation agreement, the Adviser may recoup waived and/or reimbursed amounts with respect to the Fund within thirty-six months of the date such amounts were waived or reimbursed, provided the Fund's total annual operating expenses, including such recoupment, do not exceed the Expense Cap in effect at the time of such waiver/reimbursement.

Expense Example

This Example helps you compare the cost of investing in the Fund to the cost of investing in other mutual funds. The Example assumes that (i) you invest $10,000 in the Fund for the time periods indicated and then sell or redeem all your shares at the end of those periods, (ii) your investment has a

5% return each year, and (iii) operating expenses remain the same. Only the first year of each period in the Example takes into account the expense reimbursement described above. Your actual costs may be higher or lower.

1 Year 3 Years 5 Years 10 Years

Class A

$741 $1,495 $2,267 $4,278

Class C

if you do not sell your shares

$267 $1,189 $2,121 $4,492

if you sold all your shares at the end of the period

$367 $1,189 $2,121 $4,492

Class Z

$167 $897 $1,650 $3,634

Portfolio Turnover

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in Annual Fund Operating Expenses or in the Expense Example, affect the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 136% of the average value of its portfolio.

Principal Investment Strategies

The Fund seeks to achieve its investment objective by investing, under normal circumstances, at least 80% of the value of its total assets (net assets plus the amount of any borrowings for investment purposes) in credit instruments. The Fund defines credit instruments broadly to include any debt instrument or instrument with debtlike characteristics. The Fund's investments in credit instruments typically include corporate and sovereign bonds, senior loans, convertible securities and preferred stocks, and securitized instruments such as mortgage-backed securities (MBS), commercial mortgage-backed securities (CMBS), residential mortgage-backed securities (RMBS), collateralized mortgage obligations (CMOs) and collateralized loan obligations (CLOs), which are vehicles backed by pools of assets such as mortgages, loans, or other receivables.

The adviser seeks to invest primarily in credit instruments that the Adviser expects to benefit from an event catalyst. Specific event catalysts include, but are not limited to: mergers, acquisitions, capital structure arbitrage (the exploitation of discrepancies of a company's debt and equity securities), tender offers, asset sales or other divestitures, restructurings, spin-offs, initial public offerings, new issue debt, debt refinancings, near-term debt maturities, asset monetizations (the process of converting assets into a revenue source), recapitalizations (the restructuring of a company's debt and equity structure), reorganizations, or broader geopolitical, environmental or economic events that can impact specific industries or the economy as a whole.

Catalyst driven investing also includes purchasing securities that may benefit from a company specific event such as, but not limited to, earnings, company investor days, product publications and other events which may be occurring in the industry the company operates in or in the broader economy.

The Fund may also invest in securities of late-stage distressed issuers and issuers involved in pre- and post-bankruptcy proceedings. The Fund may also purchase securities in anticipation of a company's recovery or turnaround or the liquidation of all or some of the company's assets. The success of any strategy employed by the Fund's Adviser will largely depend upon, among other things, the Adviser's skill in evaluating the likelihood of the successful completion of a particular catalyst or a related event.

In addition to the above strategies, the Fund may invest in other investments or utilize other strategies, including non-credit-related event-driven and market neutral strategies. A market neutral strategy is a type of investment strategy that seeks to profit irrespective of whether prices of securities in the market more generally are broadly increasing or decreasing. The Fund may invest in securities of companies without an identified change or event to hedge unwanted exposures to an industry or the market as a whole.

The Fund may invest in foreign issuers and securities without limit. Non- U.S. securities may be denominated in either U.S. dollars or foreign currencies.

The Fund may invest in securities of issuers of any market capitalization. Also, the Fund may invest without limit in debt instruments of any duration, maturity or credit quality, including high yield debt (commonly referred to as "junk" bonds), distressed debt and defaulted debt.

The Fund may make investments that involve the use of investment leverage. The Fund may use derivative instruments of any kind, short sale positions and repurchase agreements to create investment exposure or leverage and the Fund's total notional investment exposure may exceed its net assets significantly. The Fund may employ a variety of hedging strategies to seek to protect against issuer-related risk, including selling short the securities of the company that proposes to acquire the target company and/or the purchase and sale of put and call options.

The Fund may invest in indexed and inverse securities, such as other investment companies, including ETFs, closed-end funds and open-end mutual funds. Those investments may be made for the purpose of, among other things, gaining or hedging market exposure, hedging exposure to a particular industry, sector or component of an event-driven opportunity, or managing the Fund's cash position. The Fund may hold a significant portion of its assets in cash, money market investments, money market funds or other similar short-term investments for defensive purposes.

The Fund's holdings may be adjusted at any time. The Fund may also loan portfolio securities to earn income.

The Fund is a non-diversified fund as defined in the 1940 Act, which means that it may invest in a smaller number of issuers than a diversified fund and may invest more of its assets in the securities of a single issuer.

The Fund may engage in active and frequent trading of portfolio securities to achieve its primary investment strategies. The Adviser expects that the Fund's active or frequent trading of portfolio securities will result in a portfolio turnover rate in excess of 100% on an annual basis.

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NexPoint Funds I Summary Prospectus

October 31, 2026

Principal Risks

When you sell Fund shares, they may be worth less than what you paid for them. Consequently, you can lose money by investing in the Fund. No assurance can be given that the Fund will achieve its investment objective, and investment results may vary substantially over time and from period to period. An investment in the Fund is not appropriate for all investors.

An investment in the Fund is not a deposit of any bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency. Each risk summarized below is a principal risk of investing in the Fund and different risks may be more significant at different times depending upon market conditions or other factors.

Debt Securities Risk is the risk associated with the fact that the value of debt securities typically changes in response to various factors, including, by way of example, market-related factors (such as changes in interest rates or changes in the risk appetite of investors generally) and changes in the actual or perceived ability of the issuer (or of issuers generally) to meet its (or their) obligations. Debt instruments are subject to the risk of non-payment of scheduled interest and/or principal.

Credit Risk is the risk that the issuers of certain securities or the counterparties of a derivatives contract or repurchase contract might be unable or unwilling (or perceived as being unable or unwilling) to make interest and/or principal payments when due, or to otherwise honor its obligations. Debt securities are subject to the risk of non-payment of scheduled interest and/or principal. Non-payment would result in a reduction of income to the Fund, a reduction in the value of the obligation experiencing non-payment and a potential decrease in the net asset value ("NAV") of the Fund.

Fixed Income Market Risk is the risk that fixed income markets may, in response to governmental intervention, economic or market developments (including potentially a reduction in the number of broker-dealers willing to engage in market-making activity), or other factors, experience periods of increased volatility and reduced liquidity. During those periods, the Fund may experience increased levels of shareholder redemptions, and may have to sell securities at times when it would otherwise not do so, and at unfavorable prices. Fixed income securities may be difficult to value during such periods.

Interest Rate Risk is the risk that fixed income securities will decline in value because of changes in interest rates. When interest rates decline, the value of fixed rate securities already held by the Fund can be expected to rise. Conversely, when interest rates rise, the value of existing fixed rate portfolio securities can be expected to decline. A fund with a longer average portfolio duration will be more sensitive to changes in interest rates than a fund with a shorter average portfolio duration.

Prepayment Risk is the risk that during periods of falling interest rates, issuers of debt securities may repay higher rate securities before their maturity dates. This may cause the Fund to lose potential price appreciation and to be forced to reinvest the unanticipated proceeds at lower interest rates. This may adversely affect the NAV of the Fund's shares.

Senior Loans Risk. The Fund's investments in senior loans are typically below investment grade and are considered speculative because of the credit risk of their issuers. As with any debt instrument, senior loans are generally subject to the risk of price declines and to increases in interest rates, particularly long-term rates. Senior loans are also subject to the risk that, as interest rates rise, the cost of borrowing increases, which may increase the risk of default. In addition, the interest rates of floating rate loans typically only adjust to changes in short-term interest rates; long-term interest rates can vary dramatically from short-term interest rates. Although senior loans in which the Fund will invest will often be secured by collateral, there can be no assurance that liquidation of such collateral would satisfy the borrower's obligation in the event of a default or that such collateral could be readily liquidated. Although the Fund will generally have access to financial and other information made available to the Lenders in connection with senior loans, the amount of public information available with respect to senior loans will generally be less extensive than that available for rated, registered or exchange listed securities. Senior loans may have trade settlement periods extending beyond seven days, which could pose a liquidity risk to the Fund.

High Yield Debt Securities Risk is the risk that below investment grade securities or unrated securities of similar credit quality (commonly known as "high yield securities" or "junk securities") are more likely to default than higher rated securities. The Fund's ability to invest in high-yield debt securities generally subjects the Fund to greater risk than securities with higher ratings. Such securities are regarded by the rating organizations as predominantly speculative with respect to capacity to pay interest and repay principal in accordance with the terms of the obligation. The market value of these securities is generally more sensitive to corporate developments and economic conditions and can be volatile. Market conditions can diminish liquidity and make accurate valuations difficult to obtain.

Distressed Securities Risk is the risk that refers to the uncertainty of repayment of defaulted securities and obligations of distressed issuers. Because the issuer of such securities is likely to be in a distressed financial condition, repayment of distressed or defaulted securities (including insolvent issuers or issuers in payment or covenant default, in workout or restructuring or in bankruptcy or insolvency proceedings) is subject to significant uncertainties. Insolvency laws and practices in foreign jurisdictions are different than those in the U.S. and the effect of these laws and practices may be less favorable and predictable than in the U.S.

Investments in defaulted securities and obligations of distressed issuers are considered highly speculative.

Merger Arbitrage and Event-Catalyst Risk is the risk that the Adviser's evaluation of the outcome of a proposed event or "special situations," whether it be a merger, acquisitions, consolidations, bankruptcies, liquidations, reorganization, regulatory issue or other event, recapitalizations, spin-offs, divestitures, restructurings, tender or exchange offers or other unusual events will prove incorrect and that the Fund's return on the investment will be negative. Even if the Adviser's judgment regarding the likelihood of a specific outcome proves correct, the expected event may be delayed or completed on terms other

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than those originally proposed, which may cause the Fund to lose money. The Fund's expected gain on an individual catalyst investment is normally considerably smaller than the possible loss should the transaction be unexpectedly terminated. The securities of companies involved in special situations may be more volatile than other securities, may at times be illiquid, or may be difficult to value. Certain special situations carry the additional risks inherent in difficult corporate transitions and the securities of such companies may be more likely to lose value than the securities of more stable companies. The Fund's principal investment strategies are not specifically designed to benefit from general appreciation in the credit markets or general improvement in the economic conditions in the global economy. Accordingly, the Fund may underperform the broad credit markets under certain market conditions, such as during periods when there has been rapid appreciation in the credit markets. The Fund may also underperform the broad credit markets if it holds a significant portion of its assets in cash and money market instruments for an extended period of time due to a lack of credit catalyst opportunities.

Convertible Securities Risk is the risk that the market value of convertible securities may fluctuate due to changes in, among other things, interest rates; other economic conditions; industry fundamentals; market sentiment; the issuer's operating results, financial statements, and credit ratings; and the market value of the underlying common or preferred stock.

Non-U.S. Securities Risk is the risk associated with investing in non-U.S. issuers. Investments in securities of non-U.S. issuers involve certain risks not involved in domestic investments (for example, fluctuations in foreign exchange rates (for non-U.S. securities not denominated in U.S. dollars); future foreign economic, financial, political and social developments; nationalization; exploration or confiscatory taxation; smaller markets; different trading and settlement practices; less governmental supervision; and different accounting, auditing and financial recordkeeping standards and requirements) that may result in the Fund experiencing more rapid and extreme changes in value than a fund that invests exclusively in securities of U.S. companies. In addition, certain investments in non-U.S. securities may be subject to foreign withholding and other taxes on interest, dividends, capital gains or other income or proceeds. Those taxes will reduce the Fund's yield on any such securities. See the "Taxation" section below.

Currency Risk is the risk that fluctuations in exchange rates will adversely affect the value of the Fund's foreign currency holdings and investments denominated in foreign currencies.

Derivatives Risk is a combination of several risks, including the risks that: (1) an investment in a derivative instrument may not correlate well with the performance of the securities or asset class to which the Fund seeks exposure, (2) derivative contracts, including options, may expire worthless and the use of derivatives may result in losses to the Fund, (3) a derivative instrument entailing leverage may result in a loss greater than the principal amount invested, (4) derivatives not traded on an exchange may be subject to credit risk, for example, if the counterparty does not meet its obligations (see also "Counterparty Risk"), and (5) derivatives not traded on an exchange may be subject to liquidity risk and the related risk that the instrument is difficult or impossible to value accurately. In addition, changes in laws or regulations may make the use of derivatives more costly, may limit the availability of derivatives, or may otherwise adversely affect the use, value or performance of derivatives. The Fund's ability to pursue its investment strategy, including its strategy of investing in certain derivative instruments, may be limited to or adversely affected by the Fund's intention to qualify as a regulated investment company (a "RIC"), and its strategy may bear adversely on its ability to so qualify.

Counterparty Risk is the risk that a counterparty (the other party to a transaction or an agreement or the party with whom the Fund executes transactions) to a transaction with the Fund may be unable or unwilling to make timely principal, interest or settlement payments, or otherwise honor its obligations.

Swaps Risk involves both the risks associated with an investment in the underlying investments or instruments and counterparty risk. In a standard over-the-counter ("OTC") swap transaction, two parties agree to exchange the returns, differentials in rates of return or some other amount calculated based on the "notional amount" of predetermined investments or instruments, which may be adjusted for an interest factor.

Options Risk is the risk associated with investments in options. Options, such as covered calls and covered puts, are subject to the risk that significant differences between the securities and options markets could result in an imperfect correlation between these markets.

Hedging Risk is the risk that, although intended to limit or reduce investment risk, hedging strategies may also limit or reduce the potential for profit. There is no assurance that hedging strategies will be successful.

Tax Risk is the risk that the U.S. income tax rule may be uncertain when applied to specific arbitrage transactions, including identifying deferred losses from wash sales or realized gains from constructive sales, among other issues. Such uncertainty may cause the Fund to be exposed to unexpected tax liability.

Leverage Risk is the risk associated with the use of leverage for investment purposes to create opportunities for greater total returns. Any investment income or gains earned with respect to the amounts borrowed that are in excess of the interest that is due on the borrowing will augment the Fund's income. Conversely, if the investment performance with respect to the amounts borrowed fails to cover the interest on such borrowings, the value of the Fund's shares may decrease more quickly than would otherwise be the case. Interest payments and fees incurred in connection with such borrowings will reduce the amount of net income available for payment to Fund shareholders. Because the management fees (including administration fees) paid to NexPoint are calculated on the basis of the Fund's average daily managed assets, which include the proceeds of leverage, the dollar amount of the fees paid by the Fund to NexPoint will be higher (and NexPoint will be benefited to that extent) when leverage is utilized. NexPoint will utilize leverage only if it believes such action would result in a net benefit to the Fund's shareholders after taking into account the higher fees and expenses associated with leverage (including higher management fees).

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NexPoint Funds I Summary Prospectus

October 31, 2026

Non-Diversification Risk is the risk that an investment in the Fund could fluctuate in value more than an investment in a diversified fund. As a non-diversified fund for purposes of the 1940 Act, the Fund may invest a larger portion of its assets in the securities of fewer issuers than a diversified fund. The Fund's investment in fewer issuers may result in the Fund's shares being more sensitive to the economic results of those issuers. An investment in the Fund could fluctuate in value more than an investment in a diversified fund.

Liquidity Risk is the risk that low trading volume, lack of a market maker, large position size, or legal restrictions (including daily price fluctuation limits or "circuit breakers") limits or prevents the Fund from selling particular securities or unwinding derivative positions at desirable prices. At times, a major portion of any portfolio security may be held by relatively few institutional purchasers. Even if the Fund considers such securities liquid because of the availability of an institutional market, such securities may become difficult to value or sell in adverse market or economic conditions. Additionally, if substantial numbers of shares in the Fund were to be redeemed at the same time or at approximately the same time, the Fund might be required to liquidate a significant portion of its investment portfolio quickly to meet the redemptions and the Fund might be forced to sell portfolio securities at prices or at times when it would otherwise not have sold them.

Illiquid and Restricted Securities Risk is the risk that the Adviser may not be able to sell illiquid or restricted securities, such as securities issued pursuant to Rule 144A of the Securities Act of 1933, at the price it would like or may have to sell them at a loss. Securities of non-U.S. issuers, and emerging or developing markets securities in particular, are subject to greater liquidity risk.

Shareholder Concentration Risk is the risk that large redemptions by a small number of large shareholders can harm remaining shareholders. Particularly large redemptions may affect asset allocation decisions and could adversely impact remaining Fund shareholders.

Other Investment Companies Risk is the risk that when the Fund invests a portion of its assets in investment companies, including open-end funds, closed-end funds, ETFs and other types of investment companies, those assets will be subject to the risks of the purchased investment companies' portfolio securities, and a shareholder in the Fund will bear not only his or her proportionate share of the Fund's expenses, but also indirectly the expenses of the purchased investment companies. Risks associated with investments in closed-end funds also generally include market risk, leverage risk, risk of market price discount from NAV, risk of anti-takeover provisions and non-diversification.

Portfolio Turnover Risk is the risk that the Fund's high portfolio turnover will increase the Fund's transaction costs and may result in increased realization of net short-term capital gains (which are taxable to shareholders as ordinary income when distributed to them), higher taxable distributions and lower after-tax performance. A Fund's annual portfolio turnover rate may vary greatly from year to year.

Short Sales Risk: Short sales by the Fund that are not made "against-the-box" (that is when the Funds have an offsetting long position in the asset that is selling short) involve unlimited loss potential since the market price of securities sold short may continuously increase. When the Fund engages in a short sale on a security, they must borrow the security sold short and deliver it to the counterparty. The Fund will ordinarily have to pay a fee or premium to borrow particular securities and be obligated to repay the lender of the security any dividends or interest that accrue on the security during the period of the loan. The amount of any gain from a short sale will be decreased, and the amount of any loss increased, by the amount of the premium, dividends, interest or expenses the Fund pays in connection with the short sale. Short selling allows the Fund to profit from declines in market prices to the extent such decline exceeds the transaction costs and the costs of borrowing the securities. However, since the borrowed securities must be replaced by purchases at market prices in order to close out the short position, any appreciation in the price of the borrowed securities would result in a loss. Purchasing securities to close out the short position can itself cause the price of the securities to rise further, thereby exacerbating the loss. The Funds may mitigate such losses by replacing the securities sold short before the market price has increased significantly. Under adverse market conditions, the Fund might have difficulty purchasing securities to meet margin calls on their short sale delivery obligations, and might have to sell portfolio securities to raise the capital necessary to meet their short sale obligations at a time when fundamental investment considerations would not favor such sales. If other short positions of the same security are closed out at the same time, a "short squeeze" can occur where demand exceeds the supply for the security sold short. A short squeeze makes it more likely that the Fund will need to replace the borrowed security at an unfavorable price. See "Taxation" below for special tax considerations associated with engaging in short sales.

Structured Finance Securities Risk: A portion of the Fund's investments may consist of mortgage-backed securities, collateralized mortgage obligations, collateralized bond obligations, collateralized loan obligations or similar instruments. Such structured finance securities are generally backed by an asset or a pool of assets, which serve as collateral. Depending on the type of security, the collateral may take the form of a portfolio of mortgage loans or bonds or other assets. The Fund and other investors in structured finance securities ultimately bear the credit risk of the underlying collateral. In some instances, the structured finance securities are issued in multiple tranches, offering investors various maturity and credit risk characteristics, often categorized as senior, mezzanine and subordinated/equity according to their degree of risk. The riskiest securities are the equity tranche, which bears the bulk of defaults from the bonds or loans serving as collateral, and thus may protect the other, more senior tranches from default. If there are defaults or the relevant collateral otherwise underperforms, scheduled payments to senior tranches of such securities take precedence over those of mezzanine tranches, and scheduled payments to mezzanine tranches take precedence over those to subordinated/equity tranches. A senior tranche typically has higher ratings and lower yields than the underlying securities, and may be rated investment grade. Despite the protection

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from the equity tranche, other tranches can experience substantial losses due to actual defaults, increased sensitivity to defaults due to previous defaults and the disappearance of protecting tranches, market anticipation of defaults and aversion to certain structured finance securities as a class.

Securities Lending Risk. The Fund may make secured loans of its portfolio securities. Any decline in the value of a portfolio security that occurs while the security is out on loan is borne by the Fund, and will adversely affect performance. Also, there may be delays in recovery of securities loaned, losses in the investment of collateral, and loss of rights in the collateral should the borrower of the securities fail financially while holding the security.

Operational and Technology Risk is the risk that cyber-attacks, disruptions, or failures that affect the Fund's service providers, counterparties, market participants, or issuers of securities held by the Fund may adversely affect the Fund and its shareholders, including by causing losses for the Fund or impairing Fund operations.

Securities Market and Selection Risk is the risk that the value of securities owned by the Fund may go up or down, sometimes rapidly or unpredictably, due to factors affecting particular companies or the securities markets generally. A general downturn in the securities market may cause multiple asset classes to decline in value simultaneously. Many factors can affect this value and you may lose money by investing in the Fund.

The value of a security or other asset may decline due to changes in general market conditions, economic trends or events that are not specifically related to the issuer of the security or other asset, or factors that affect a particular issuer or issuers, exchange, country, group of countries, region, market, industry, group of industries, sector or asset class. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues like pandemics or epidemics, recessions, or other events could have a significant impact on the Fund and its investments. Selection risk is the risk that the securities selected by Fund management will underperform the markets, the relevant indices or the securities selected by other funds with similar investment objectives and investment strategies. This means you may lose money.

Limited Operating History Risk is the risk that the Fund has a limited operating history, which may make it difficult for investors to evaluate the Fund's performance and investment strategy. The Fund may not attract sufficient assets to achieve or maximize investment and operational efficiencies.

Regulatory Risk is the risk that to the extent that legislation or state or federal regulators impose additional requirements or restrictions with respect to the ability of financial institutions to make loans in connection with highly leveraged transactions, the availability of loan interests for investment by the Fund may be adversely affected.

Performance

The Fund commenced operations on July 2, 2025. Because the Fund has not been in operation for a full calendar year, calendar year total return information is not available and no bar chart or average annual total return table is presented. Performance information will be included in a future prospectus after the Fund has completed a full calendar year of operations.

Portfolio Management

NexPoint Asset Management, L.P. serves as the investment adviser to the Fund. The primary individual portfolio managers for the Fund are:

Portfolio Managers Portfolio Manager
Experience in this Fund
Title with Adviser
James Dondero 1 year President and Co-Founder
Scott Johnson 1 year Managing Director

Purchase and Sale of Fund Shares

Purchase Minimums

Initial Investment

$ 2,500

Subsequent Investments

$ 50

You may purchase shares of the Fund by mail, bank wire, electronic funds transfer or by telephone after you have opened an account with the Fund. You may obtain an account application from your financial intermediary, from the Fund by calling 1-877-665-1287 or from the Fund's website at https://www.nexpointassetmgmt.com/resources/#forms.

In general, you may sell (redeem) all or part of your Fund shares on any business day through the following options:

•

Through your Financial Intermediary,

•

By writing to NexPoint Funds I - NexPoint Credit Catalyst Fund, 801 Pennsylvania Ave, Kansas City, Missouri, 64105, or

•

By calling SS&C Technologies, Inc. at 1-877-665-1287

Financial intermediaries may independently charge fees for shareholder transactions or for advisory services. Please see their materials for details.

Tax Information

The Fund intends to make distributions that generally will be taxable to you as ordinary income, qualified dividend income or capital gains, unless you are a tax-exempt investor or otherwise investing in the Fund through a tax-advantaged arrangement, such as a 401(k) plan or an individual retirement account. If you are investing in the Fund through a tax-advantaged arrangement, you may be taxed later upon withdrawals from that arrangement.

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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NexPoint Funds I Summary Prospectus

October 31, 2026

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Highland Funds I published this content on October 30, 2026, and is solely responsible for the information contained herein. Distributed via EDGAR on October 30, 2026 at 18:04 UTC. If you believe the information included in the content is inaccurate or outdated and requires editing or removal, please contact us at [email protected]