Simplify High Yield ETF

CDX

a series of Simplify Exchange Traded Funds

SUMMARY PROSPECTUS

November 1, 2026

Before you invest, you may want to review the Fund’s prospectus, which contains more information about the Fund and its risks. The Fund’s prospectus and statement of additional information dated November 1, 2026, are incorporated by reference into this summary prospectus. You can obtain these documents and other information about the Fund online at www.simplify.us/etfs or by calling 1-855-772-8488.

These securities have not been approved or disapproved by the Securities and Exchange Commission nor has the Securities and Exchange Commission passed upon the accuracy or adequacy of this Prospectus. Any representation to the contrary is a criminal offense.

Shares of the Fund are listed and traded on the NYSE Arca, Inc.

FUND SUMMARY – SIMPLIFY HIGH YIELD ETF

Investment Objective: Simplify High Yield ETF (the “Fund” or “CDX”) seeks to maximize total return.

Fees and Expenses of the Fund: This table describes the fees and expenses that you may pay if you buy, sell, and hold shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries on the purchase and sale of Fund shares, which are not reflected in the tables and examples below.

Example: This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other 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. 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 upon 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 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 55% of the average value of its portfolio.

Principal Investment Strategies: The Adviser seeks to achieve the Fund’s investment objective by investing in high yield bonds also known as “junk bonds” primarily by purchasing swaps on exchange traded funds and applying a credit hedge derivatives strategy to the Fund’s investments.

High Yield Strategy

The Fund has adopted a non-fundamental investment policy that, under normal circumstances, the Fund will invest at least 80% of its net assets (plus any borrowings for investment purposes) in securities that provide exposure to high yield securities, also known as junk bonds. The Fund defines junk bonds as those rated below Baa3 by Moody’s Investors Service or below BBB- by Standard and Poor’s Rating Group, or, if unrated, determined by the Adviser to be of similar credit quality. The Adviser does not frequently trade securities but seeks to maintain consistent exposure to junk bonds primarily through its purchase of swaps on exchange traded funds that primarily invest in high-yield securities (“H-Y ETFs”); and secondarily through its purchase of H-Y ETFs call options on H-Y ETFs, as well as by selling (writing) put options H-Y ETFs. The Adviser determines the securities to which it seeks exposure based on factors such as price, liquidity, and track record.

The H-Y ETFs underlying the swaps that the Fund will invest in may target high yield bonds with different maturities, durations, and quality requirements in connection with their investment strategies. Duration is a measure of price sensitivity of a debt security or a portfolio of debt securities to relative changes in interest rates. For instance, a duration of “five years” means that a security’s or portfolio’s price would be expected to decrease by approximately 5% with a 1% increase in interest rates (assuming a parallel shift in yield curve). Maturity is the period during which its owner will receive interest payments on the investment. When the bond reaches maturity, the Fund is repaid its par, or face value. A bond’s quality is a reference to the grade given to a bond by a rating service that indicates its credit quality. The rating takes into consideration a bond issuer’s financial strength or its ability to pay a bond’s principal and interest in a timely fashion. For instance, a “AAA” high-grade rated bond offers more security and lower profit potential (lower yield) than a “B-” rated speculative bond. The Adviser may invest in affiliated money market ETFs to manage liquidity or to pledge as collateral for derivatives.

Derivatives Overlay – Generally

In total, the Fund may invest up to 20% of the Fund’s portfolio in derivatives (measured by purchase price in the case of options or collateral pledged in the case of other derivatives) through a credit hedge strategy and/or an income generating option strategy. The Adviser anticipates purchasing and selling its derivatives on a monthly, quarterly, and annual basis, depending upon the Fund’s rebalancing requirements and expiration dates. However, the Adviser may rebalance the Fund’s derivative portfolio on a more frequent basis for a number of reasons such as when market volatility renders the protection provided by the derivative strategy ineffective or a derivative position has appreciated to the point that it is prudent to decrease the Fund’s exposure and realize gains for the Fund’s shareholders. Derivatives may be exchange-traded or over-the-counter (“OTC”); index-based or linked to a specific security. The Adviser selects derivatives based upon its evaluation of relative value based on expected hedging effectiveness, cost, and in the case of options, strike price (price that the option can be bought or sold by the option holder) and maturity (the last date the option contract is valid) and will exercise or close the options based typically on maturity.

Credit Hedge Strategy

The Fund may invest up to 20% of the Fund’s portfolio in derivatives to hedge against interest rate risk and credit risk. When the Adviser believes credit risk will be increasing, it will hedge primarily by receiving protection through total return swaps that use fixed income instruments, fixed income indexes, fixed income ETFs, or H-Y ETFs as reference assets. However, when the Adviser believes a short-term opportunity for a more-effective hedge is available, it may also use total return swaps that use equities, equity indexes or equity ETFs as reference assets to manage interest rate and credit risk. The Adviser closes derivative positions when it believes the related risk is no longer significant or to use a more efficient or cost-effective derivative.

Income Generating Option Strategy

The Fund may invest up to 20% of the Fund’s portfolio in derivatives to generate additional income. To do so, the Fund employs an option and option spread writing strategy on instruments linked to equities, debt, volatility indices, commodities, and currencies. The equity and fixed income strategies include primarily U.S. companies but may include companies from both emerging and developed foreign markets and may include companies of any market capitalization. The commodity strategies may include all types of commodities and commodity indexes. Currency strategies are those that attempt to profit from the changes in the relative value of various currencies. Volatility strategies are those that attempt to profit from the changes in the historical or implied return volatility of futures or securities indexes. Volatility is a measure of a reference asset’s historical or expected future price movements.

A call option gives the owner the right, but not the obligation, to buy an asset at a specified price (strike price) within a specific time period. A put option gives the owner the right, but not the obligation, to sell an asset at a specified price (strike price) within a specific time period. By selling put and call options in return for the receipt of premiums (the purchase price of an option), the Adviser attempts to increase Fund income as the passage of time decreases the value of the written options. Gains from written option premiums are capital gains, but commonly referred to as income. The option writing strategy is a form of leveraged investing. The Adviser focuses on writing short-term options with less than one-month to maturity because their value erodes faster than long-term options.

Call Spread Sub-Strategy

When the Adviser believes an asset’s price will decrease, remain unchanged, or only increase slightly it employs a call spread strategy. In a call option spread, the Fund sells (writes) an out of the money (above current market price) call option while also purchasing a further out of the money call option.

Put Spread Sub-Strategy

When the Adviser believes an asset’s price will increase, remain unchanged, or only decrease slightly it employs a put spread strategy. In a put option spread, the Fund sells (writes) an out of the money (below current market price) put option while also purchasing a further out of the money put option.

The Adviser expects the written options to expire worthless, but purchases lower-cost further out of the money options to insulate the Fund from large losses if the written options increase in value. The Adviser expects options to be held to expiration but may adjust positions following a large (over 10%) price swing in an option’s reference asset.

The Fund also holds cash and invests in cash-like instruments or high-quality short term fixed income securities to serve as collateral for swaps, futures and assuring its performance to an option buyer when writing options (collectively, “Collateral”). The Collateral may consist of (1) U.S. Government securities, such as bills, notes and bonds issued by the U.S. Treasury; (2) money market funds (including affiliated money market ETFs); (3) fixed income ETFs; and/or (4) corporate debt securities, such as commercial paper and other short-term unsecured promissory notes issued by companies that are rated investment grade or of comparable quality. The Adviser considers an unrated security to be of comparable quality to a security rated investment grade if it believes it has a similar low risk of default.

Principal Investment Risks: As with all funds, there is the risk that you could lose money through your investment in the Fund. Many factors affect the Fund’s net asset value and price of shares and performance.

The following describes the principal risks the Fund bears with respect to its investments. As with any fund, there is no guarantee that the Fund will achieve its goal.

Junk Bond Risk. Lower-quality bonds, known as “high yield” or “junk” bonds, present greater risk than bonds of higher quality, including an increased risk of default. An economic downturn or period of rising interest rates could adversely affect the market for these bonds and reduce the Fund’s ability to sell its bonds. Longer maturity and longer duration bond prices will decline more in response to rising interest rates. The lack of a liquid market for these bonds could decrease the Fund’s share price.

Active Management Risk. The Fund is subject to the risk that the investment management strategy may not produce the intended results and may negatively impact Fund performance. The Adviser’s overlay strategy will not fully protect the Fund from declines in the market.

Cash or Cash Equivalents Risk. At any time, the Fund may have significant investments in cash or cash equivalents. When a substantial portion of a portfolio is held in cash or cash equivalents, there is the risk that the value of the cash account, including interest, will not keep pace with inflation, thus reducing purchasing power over time. Additionally, in rising markets, holding cash or cash equivalents may adversely affect the Fund’s performance and the Fund may not achieve its investment objective.

Commodity and Currency Risk. Investments linked to commodities or currencies can be highly volatile compared to investments in traditional securities, and may experience large losses. The value of instruments linked to commodities or currencies may be affected by market movements, commodity or currency benchmarks (as the case may be), volatility, changes in interest rates, or factors affecting a particular industry, commodity or currency. For example, commodities may be affected by numerous factors, including drought, floods, fires, weather, livestock disease, pipeline ruptures or spills, embargoes, tariffs and international, economic, political or regulatory developments.

Derivatives Risk. The use of derivative instruments involves risks different from, or possibly greater than, the risks associated with investing directly in securities and other traditional investments. These risks include (i) the risk that the counterparty to a derivative transaction may not fulfill its contractual obligations; (ii) risk of mispricing or improper valuation; and (iii) the risk that changes in the value of the derivative may not correlate perfectly with the underlying asset, rate or index. Derivative prices are highly volatile and may fluctuate substantially during a short period of time. Such prices are influenced by numerous factors that affect the markets, including, but not limited to: changing supply and demand relationships; government programs and policies; national and international political and economic events, changes in interest rates, inflation and deflation and changes in supply and demand relationships. Trading derivative instruments involves risks different from, or possibly greater than, the risks associated with investing directly in securities.

Early Close/Trading Halt Risk. An exchange or market may close or issue trading halts on specific securities, or the ability to buy or sell certain securities or financial instruments may be restricted, which may prevent the Fund from buying or selling certain securities or financial instruments. In these circumstances, the Fund may be unable to rebalance its portfolio, may be unable to accurately price its investments and may incur substantial trading losses.

Equity Securities Risk. The net asset value of the Fund will fluctuate based on changes in the value of the equity securities that serve as reference assets to a total return swap, option, or future held by the Fund. Equity prices can fall rapidly in response to developments affecting a specific company or industry, or to changing economic, political or market conditions.

ETF Structure Risks: The Fund is structured as an ETF and will invest in underlying ETFs. As a result, the Fund is subject to special risks, including:

Fixed Income Securities Risk. When the Fund invests in fixed income securities, the value of your investment in the Fund will fluctuate with changes in interest rates. Typically, a rise in interest rates causes a decline in the value of fixed income securities owned by the Fund. In general, the market price of fixed income securities with longer maturities will increase or decrease more in response to changes in interest rates than shorter-term securities. Other risk factors include credit risk (the debtor may default), extension risk (an issuer may exercise its right to repay principal on a fixed rate obligation held by the Fund later than expected), and prepayment risk (the debtor may pay its obligation early, reducing the amount of interest payments).

Futures Risk. The Fund’s use of futures involves risks different from, or possibly greater than, the risks associated with investing directly in securities and other traditional investments. These risks include (i) leverage risk (ii) risk of mispricing or improper valuation; and (iii) the risk that changes in the value of the futures contract may not correlate perfectly with the underlying index.

Leverage Risk. The use of leverage by the Fund, such as the use of derivatives, will cause the Fund to incur additional expenses and magnify the Fund’s gains or losses.

Market and Geopolitical Risk. The increasing interconnectivity between global economies and financial markets increases the likelihood that events or conditions in one region or financial market may adversely impact issuers in a different country, region or financial market. Securities in the Funds’ portfolios may underperform due to inflation (or expectations for inflation), interest rates, global demand for particular products or resources, climate change or climate related events, natural disasters, pandemics, epidemics, terrorism, international conflicts and wars, regulatory events and governmental or quasi-governmental actions. The occurrence of global events similar to those in recent years may result in market volatility and may have long term effects on both the U.S. and global financial markets.

Option Risk. As the buyer of a put or call options, the Fund risks losing the entire premium invested in the option if the Fund does not exercise the option.

Over-the-Counter Market Risk. Securities and options traded in over-the-counter markets may trade less frequently and in limited volumes and thus exhibit more volatility and liquidity risk, and the prices paid by the Fund in over-the-counter transactions may include an undisclosed dealer markup. The Fund is also exposed to default by the over-the-counter option writer who may be unwilling or unable to perform its contractual obligations to the Fund.

Swap Risk. Swaps are subject to tracking risk because they may not be perfect substitutes for the instruments they are intended to hedge or replace. Over the counter swaps are subject to counterparty default. Leverage inherent in derivatives will tend to magnify the Fund’s losses.

Underlying Fund Risk. ETFs in which the Fund invests are subject to investment advisory and other expenses, which will be indirectly paid by the Fund. As a result, the cost of investing in the Fund will be higher than the cost of investing directly in the ETFs and may be higher than other funds that invest directly in stocks and bonds. Each of the ETFs is subject to its own specific risks, but the Adviser expects the principal investments risks of such ETFs will be similar to the risks of investing in the Fund.

Affiliated Money Market ETF Conflict of Interest Risk. Because the Fund may invest in an affiliated ETF, the Adviser is subject to conflicts of interest in allocating the Fund’s assets to the affiliated ETF. The Adviser will receive more revenue to the extent it selects an affiliated ETF rather than an unaffiliated ETF for inclusion in the Fund’s portfolio.

Performance: The following performance information provides some indication of the risks of investing in the Fund. The bar chart shows changes in the Fund’s performance from year to year. The table shows how the Fund’s average annual total returns compare to those of a broad-based securities market index and an additional index. The additional index tracks U.S. high-yield corporate bonds and is included as a performance benchmark relevant to the Fund’s high-yield fixed income investment strategy. The Fund’s past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. Updated performance information is available at no cost by visiting www.simplify.us/etfs or by calling 1 (855) 772-8488.

During the periods shown in the bar chart above, the Fund’s highest quarterly return was 6.58% (quarter ended December 31, 2023) and the Fund’s lowest quarterly return was -1.55% (quarter ended December 31, 2024). The calendar year-to-date total return of the Fund as of September 30, 2026 was (3.91)%.

Average Annual Total Returns for the Periods Ended December 31, 2025

After-tax returns are calculated using the historical highest individual federal marginal income tax rates during the period covered by the table above and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold shares through tax-advantaged arrangements, such as 401(k) plans or individual retirement accounts.

Investment Adviser: Simplify Asset Management Inc. (the “Adviser”).

Portfolio Managers: David Berns, PhD, Chief Investment Officer of the Adviser and Chris Getter, Emerging Markets Strategist of the Adviser serve as portfolio managers of the Fund. Dr. Berns has served the Fund as a portfolio manager since it commenced operations in February 2022. Mr. Getter has served as portfolio manager since October 2025. Dr. Berns and Mr. Getter are jointly and primarily responsible for the management of the Fund.

Purchase and Sale of Fund Shares: The Fund will issue and redeem Shares at NAV only in large blocks of 25,000 Shares (each block of Shares is called a “Creation Unit”). Creation Units are issued and redeemed primarily in-kind for securities but may include cash. Individual Shares may only be purchased and sold in secondary market transactions through brokers. Except when aggregated in Creation Units in transactions with Authorized Participants, the Shares are not redeemable securities of the Fund.

Shares of the Fund are listed for trading on the Exchange and trade at market prices rather than NAV. Shares of the Fund may trade at a price that is greater than, at, or less than NAV. An investor may incur costs attributable to the difference between the highest price a buyer is willing to pay to purchase shares of the Fund (bid) and the lowest price a seller is willing to accept for shares of the Fund (ask) when buying or selling shares in the secondary market. Recent information on the Fund’s NAV, market price, premiums and discounts, and bid-ask spreads is available at www.simplify.us/etfs.

Tax Information: The Fund’s distributions generally will be taxable as ordinary income or long-term capital gains. A sale of Shares may result in capital gain or loss.

Payments to Broker-Dealers and Other Financial Intermediaries: If you purchase 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.