Summary Prospectus by Investment Company (Form 497K)

Investment Objective

Long-term capital growth, consistent with Islamic principles.

Fees and Expenses

This section 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 table and example below.

Shareowner Fees

None.

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 investors compare the cost of investing in shares of the Fund with the cost of investing in other mutual funds.

The Example assumes an investor invests $10,000 in shares of the Fund for the time periods indicated and then redeems all shares at the end of those periods. The Example also assumes that the investment has a 5% return each year and that the Fund's operating expenses remain the same. Although actual costs may be higher or lower, based on these assumptions, an investor's expenses would be:

Portfolio Turnover

The Fund may have 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 12.09% of the average value of its portfolio.

Principal Investment Strategies

The Fund invests primarily in common stocks, including American Depositary Receipts and foreign stocks. Investment decisions are made in accordance with Islamic principles. Generally, Islamic principles require that investors share in profit and loss, that they receive no usury or interest, and that they do not invest in a business that is prohibited by Islamic principles. To the extent prohibited by Islamic investment principles the Fund does not invest in companies primarily engaged in businesses such as alcohol, tobacco, pork products, pornography, interest-based banks, finance associations and insurers, weapons, and gambling.

The Fund does not make any investments that pay interest. Islamic principles discourage speculation, and the Fund tends to hold investments for several years. The Fund may invest its uninvested cash in short-term Islamic income-producing investments called murabaha and wakala, as described below.

The Fund diversifies its investments across industries and companies. It is the policy of the Fund, under normal circumstances, to invest at least 80% of total net assets in common stocks that the adviser believes exhibit growth characteristics. The adviser considers a stock to exhibit growth characteristics if, at the time of investment, the stock's anticipated revenue, earnings, or cash flow growth rate exceeds the nominal growth rate of the U.S. economy over a horizon of at least three years. The Fund principally follows a large-cap growth investment style. The Fund may also invest in smaller and less seasoned companies. The Fund seeks companies demonstrating both Islamic and sustainable characteristics.

The Fund's adviser considers issuers with sustainable characteristics to be those issuers that are more established, consistently profitable, and financially strong, with robust policies in the areas of the environment, social responsibility, and corporate governance (collectively referred to as "Sustainability").

Except for murabaha and wakala investments, the adviser employs a sustainable rating system based on its own, as well as third-party, data to identify issuers believed to have lower Sustainability risks. The use of third-party data does not include third-party environmental, social, or governance ("ESG") ratings or criteria established by third parties for third-party ratings. The adviser's proprietary scoring system assesses how well a company performs relative to a blend of its industry, sector, and country peers. In addition to the financial considerations discussed above, the adviser considers sustainability practices such as carbon emissions, water usage, renewable energy, and fair labor and supply chain practices. The Fund's Sustainability evaluation process considers risks and opportunities holistically, meaning an issuer will not necessarily be excluded from investment due to any one particular factor if the overall analysis results in a favorable evaluation by the adviser. The adviser also uses negative screening to exclude companies primarily engaged in

higher Sustainability risk businesses, such as companies in the business of fossil fuel exploration, production, or refining, and, to the extent prohibited by Islamic investment principles, companies primarily engaged in businesses such as alcohol, tobacco, pork products, pornography, interest-based banks, finance associations and insurers, weapons, and gambling.

Because Islamic principles preclude the use of interest-paying instruments, the Fund's cash positions do not earn interest income. The Fund may invest its cash positions in murabaha and wakala, which are notes and certificates issued for payment by foreign governments, their agencies, and financial institutions in transactions structured to be in accordance with Islamic principles. Murabaha involves a purchase and sale contract, and wakala involves the operation of an account under the Islamic finance principle of wakala (an agency agreement). These investments typically involve the purchase of financial certificates representing investments in tangible assets, project financing, sale and leaseback arrangements, and the distribution of profits (as opposed to the payment of interest) related to the underlying asset or project. Unlike an investment in a bond that represents a promise to pay interest, these investments involve the sharing of profits and losses in the assets or projects financed by the Fund's investment in the notes and certificates. In addition, the Fund may invest cash positions in time deposits with banks that involve underlying purchase and sale agreements to generate the return on the deposit.

The Fund will seek to gain exposure to murabaha and wakala investments by investing up to 20% of the Fund's total net assets in a wholly-owned and controlled subsidiary, which is organized under the laws of the Cayman Islands (the "Subsidiary"). The Subsidiary invests in murabaha and wakala investments and may invest in other short-term Islamic income-producing investments. The Fund invests in the Subsidiary in order to gain exposure to murabaha and wakala investments within the limitations of the federal tax law, rules and regulations that apply to "regulated investment companies."

Principal Risks of Investing

Growth investing risk: The Funds may invest primarily in growth stocks, which may be more volatile than slower-growing value stocks. Growth stocks typically trade at higher multiples of current earnings than other stocks, which may lead to inflated prices. Growth stocks often are more sensitive to market fluctuations than other securities because their market prices are highly sensitive to future earnings expectations. At times when it appears that these expectations may not be met, growth stocks' prices typically fall and declines may be significant when a stock had been supported by significant investor speculation. During market cycles when growth investing is out of favor, selling growth stocks at desired prices may be more difficult.

Market risk: The value of the Fund's shares rises and falls as the market value of the securities in which the Fund invests goes up and down. Consider investing in the Fund

only if you are willing to accept the risk that you may lose money. Fund share prices, yields, and total returns will change with the fluctuations in the securities markets as well as the fortunes of the industries and companies in which the Fund invests.

Investment strategy risk: Islamic principles restrict the Fund's ability to invest in certain market sectors, such as financial companies and conventional fixed-income securities. The adviser believes that Islamic and sustainable investing may mitigate security-specific risks, but the screens used in connection with these strategies reduce the investable universe, which may limit investment opportunities and adversely affect the Fund's performance. Because Islamic principles preclude the use of interest-paying instruments, cash positions do not earn interest income but, to the extent the Fund invests cash in murabaha or wakala, the Fund will share in the distribution of profits (as opposed to the payment of interest) related to any murabaha or wakala investments.

Equity securities risk: Equity securities may experience significant volatility in response to economic or market conditions or adverse events that affect a particular industry, sector, or company. Larger companies may have slower rates of growth as compared to smaller, faster-growing companies, and at times may be out of favor with investors. Smaller companies may have more limited financial resources, products, or services, and tend to be more sensitive to changing economic or market conditions. The Fund also tends to favor growth stocks, which tend to trade based on future earnings expectations, and may be more volatile, especially when market expectations are not met.

Small-cap risk: The smaller and less seasoned companies that may be in the Fund have a greater risk of price volatility. Growth stocks, which can be priced on future expectations rather than current results, may decline substantially when expectations are not met or general market conditions weaken.

Foreign investing risk: The Fund may invest in securities that are not traded in the United States when market conditions or investment opportunities arise that, in the judgment of the investment adviser, warrant such investment. Investments in the securities of foreign issuers may involve risks in addition to those normally associated with investments in the securities of US issuers. All foreign investments are subject to risks of: (1) foreign political and economic instability; (2) adverse movements in foreign exchange rates; (3) currency devaluation; (4) the imposition or tightening of exchange controls or other limitations on repatriation of foreign capital; (5) changes in foreign governmental attitudes toward private investment, including potential nationalization, increased taxation, or confiscation of assets; and (6) differing reporting, accounting, and auditing standards of foreign countries.

Sector risk: From time to time, based on market or economic conditions, the Fund may have significant positions in one or more sectors of the market. To the extent the Fund invests more heavily in particular

sectors, its performance will be especially sensitive to developments that significantly affect those sectors. Individual sectors may be more volatile, and may perform differently, than the broader market. The industries that constitute a sector may all react in the same way to economic, political, or regulatory events which may cause the Fund's returns to suffer.

Technology sector risk: The Fund's investments in technology companies expose the Fund to risks. For example, rapid advances in science and technology might cause existing products to become obsolete, and the Fund's returns could suffer to the extent it holds an affected company's shares. A number of technology companies engaged in consumer-facing activities are potentially subject to more aggressive government regulation and intervention in their traditional business activities. This fact may affect a company's overall profitability and cause its stock price to be more volatile. Additionally, technology companies are dependent upon consumer and business acceptance as new technologies evolve.

Murabaha risk: A murabaha transaction involves a purchase and deferred-payment resale of an asset. The asset is typically purchased by an Islamic bank as agent for the Fund. The bank, acting as the Fund's agent, immediately resells the asset to a previously identified third party who agrees to repay the Fund's cost for the asset plus a profit. Murabaha investments are subject to market risk (fluctuating prices and exchange rates), credit risk, and operational risk (errors in processes).

Wakala risk: When the Fund invests in wakala, it will be subject to the credit risk of the bank or entity acting as the agent, and the risk that the bank or entity will not manage the investment in a profitable manner.

Interest rate risk: The Fund does not invest in interest bearing investments, However, since murabaha and wakala are Islamic fixed-income investments, the financial and economic data associated with interest-bearing investments similarly affect the yields and returns on murabaha and wakala. Changes in interest rates impact prices of fixed-income and related investments. When interest rates rise, the value of fixed-income investments (paying a lower rate of interest) generally will fall. Investments with shorter terms may have less interest rate risk, but generally have lower returns and, because of the more frequent maturity dates, may involve higher re-investment costs.

Credit risk: Corporate and sovereign issuers of the notes and certificates in which the Fund invests may not be able or willing to make payments when due, which may lead to default or restructuring of the investment. In addition, if the market perceives deterioration in the creditworthiness of an issuer, the value and liquidity of the issuer's securities may decline.

Subsidiary investment risk: By investing in the Subsidiary, the Fund is subject to the risks associated with the Subsidiary's investments. Those investments are similar to the investments that are permitted to be held by the Fund and are subject to

the same risks that would apply to similar investments if held directly by the Fund. The Subsidiary is organized under the laws of the Cayman Islands and is not registered with the SEC under the Investment Company Act of 1940, as amended. Accordingly, the Fund will not receive all of the protections offered to shareowners of registered investment companies. Changes in the laws of the United States and/or the Cayman Islands could result in the inability of the Fund and/or the Subsidiary to operate as intended, which may negatively affect the Fund and its shareowners.

Tax risk: To qualify as a regulated investment company ("RIC"), the Fund must meet certain requirements concerning the source of its income. The Fund's investment in the Subsidiary is intended to provide exposure to murabaha and wakala in a manner that is consistent with the "qualifying income" requirement applicable to RICs. Failure to qualify as a RIC could subject the Fund to adverse tax consequences, including a federal income tax on its net income at regular corporate rates, as well as a tax to shareowners on such income when distributed as an ordinary dividend.

The tax treatment of the Fund's investment in the Subsidiary may be adversely affected by future legislation, court decisions, Treasury Regulations, and/or guidance issued by the Internal Revenue Service that could affect the character, timing, and/or amount of the Fund's taxable income or any gains or distributions made by the Fund.

Performance

Annual Total Return

The following bar chart presents the calendar year total returns of the Fund's Investor Shares before taxes. The bar chart provides an indication of the risks of investing in the Fund by showing changes in performance from year to year. A fund's past performance (before and after taxes) is not a guarantee of how a fund will perform in the future.

Performance data current to the most recent month-end and quarter-end are available on www.saturna.com/resources/literature.

The year-to-date return as of the most recent calendar quarter (which ended June 30, 2026) was 19.39%.

Average Annual Total Returns

The table below presents the average annual returns of the Fund and provides an indication of the risks of investing in the Fund by showing how the Fund's average annual returns for 1, 5, and 10 years compare to those of a broad-based securities market index and an additional index with characteristics relevant to the Fund's investment strategy.

​1 Amana Growth Fund Investor Shares began operations February 3, 1994.

​2 Amana Growth Fund Institutional Shares began operations September 25, 2013, and the Life of Fund return for the Bloomberg US Large Cap and Bloomberg 1000 Growth Indexes is shown since this date.

After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of any state or local taxes. After-tax returns illustrated are only for the Investor Shares; after-tax returns for Institutional Shares will vary. Actual after-tax returns depend on an investor's tax situation and likely differ from those illustrated. After-tax illustrations are not relevant to retirement plans, corporations, trusts, or other investors that are taxed at special rates. Return after taxes on distributions and sale of Fund shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of Fund shares.

Investment Adviser

Saturna Capital Corporation ("Saturna") is the Growth Fund's investment adviser.

Portfolio Managers

Saturna employs a team-based portfolio management structure, with teams of three managers sharing equal input and responsibility for portfolio management decisions. Mr. Monem A. Salam, MBA, executive vice president and portfolio manager at Saturna, has been a portfolio manager of the fund since September of 2026. Previously he has been a deputy portfolio manager of the Fund. Mr. Levi Stewart Zurbrugg MBA, CFA®, CPA®, a senior investment analyst and portfolio manager at Saturna, has been a portfolio manager of the fund since September of 2026. Mr. Jason S. Mitchell MBA, a senior investment analyst and portfolio manager at Saturna, has been a portfolio manager of the fund since September of 2026. Previously he has been a deputy portfolio manager of the Fund.

Purchase and Sale of Fund Shares

You may open an account and purchase the Fund's Investor Shares by sending a completed application, a photocopy of a government-issued identity document, and a check for $100 or more payable to the Amana Growth Fund.

Growth Fund Institutional Shares are available with a minimum investment of $100,000.

Shareowners may purchase additional shares at any time in minimum amounts of $25.

Shareowners may redeem shares of their investment on any business day by these methods:

Tax Information

Any distributions you receive from the Fund may be taxed as ordinary income, qualified dividend income, or capital gains.

Financial Intermediary Compensation

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.