# EDGAR Filing Document

**Accession Number:** 0000811860
**File Stem:** 0001398344-26-005890
**Filing Date:** 2026-3
**Character Count:** 17987
**Document Hash:** 42ccf0292066664513a8efeb6e743c2d
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001398344-26-005890.hdr.sgml**: 20260330

**ACCESSION NUMBER**: 0001398344-26-005890

**CONFORMED SUBMISSION TYPE**: 497K

**PUBLIC DOCUMENT COUNT**: 2

**FILED AS OF DATE**: 20260330

**DATE AS OF CHANGE**: 20260330

**EFFECTIVENESS DATE**: 20260330

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** SATURNA INVESTMENT TRUST
- **CENTRAL INDEX KEY:** 0000811860

**ORGANIZATION NAME:**
- **EIN:** 356447892
- **STATE OF INCORPORATION:** WA
- **FISCAL YEAR END:** 1130

**FILING VALUES:**
- **FORM TYPE:** 497K
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 033-13247
- **FILM NUMBER:** 26813745

**BUSINESS ADDRESS:**
- **STREET 1:** 1300 NORTH STATE STREET
- **CITY:** BELLINGHAM
- **STATE:** WA
- **ZIP:** 98225-4730
- **BUSINESS PHONE:** 360-734-9900

**MAIL ADDRESS:**
- **STREET 1:** 1300 NORTH STATE STREET
- **CITY:** BELLINGHAM
- **STATE:** WA
- **ZIP:** 98225-4730

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** NORTHWEST INVESTORS TRUST
- **DATE OF NAME CHANGE:** 19920703

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** NORTHWEST INVESTORS TAX EXEMPT BUSINESS TRUST
- **DATE OF NAME CHANGE:** 19901024

## Series and Classes Contracts Data

### Saturna Sustainable Bond Fund (Series ID: S000048620)

| Class ID   | Class Name                    | Ticker Symbol   |
|:---|:---|:---|
| C000153268 | Saturna Sustainable Bond Fund | SEBFX           |

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| | |
|:---|:---|
| **Saturna Funds** | **Global Sustainable Bond\***<br>**Ticker Symbol: SEBFX**<br> **{Shares2}** |

---

**March 30, 2026**

SUMMARY PROSPECTUS

*\*As of March 30, 2026, the Saturna Sustainable Bond Fund was renamed the Saturna Global Sustainable Bond Fund.*

*Before you invest, you may want to review Saturna Global Sustainable Bond Fund's prospectus, which contains more information about the Fund and its risks. You can find the Fund's* **prospectus** *and other information about the Fund, including the* **statement of additional information** *and most recent reports to shareowners, online at www.saturna.com/ resources/literature. You can also get this information at no cost by calling 1-800-728-8762 or by sending an email request to info@saturna.com. The Fund's prospectus and statement of additional information, both dated March 30, 2026, are incorporated by reference into this Summary Prospectus.*

**Saturna Global Sustainable Bond Fund**

**Investment Objective**

Current income and capital preservation.

**Fees and Expenses**

This section describes the fees and expenses that you may pay if you buy and hold 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** (fees paid directly from your investment)

None.

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

---

| | |
|:---|:---|
| **Global Sustainable Bond Fund** | **Global Sustainable Bond** |
| Management Fees | 0.55% |
| Other Expenses | 0.24% |
| **Total Annual Fund Operating Expenses** | **0.79%** |
| Fee Waiver and Expense Reimbursement<sup>1</sup> | (0.19)% |
| **Total Annual Fund Operating Expenses after Fee Waiver and Expense Reimbursement** | **0.60%** |

---

*<sup>1</sup>* *The adviser has contractually agreed through March 31, 2027, to waive fees and/or reimburse expenses of the Fund's Z Shares to the extent necessary to ensure that the net operating expenses, excluding brokerage commissions, taxes, and extraordinary expenses, do not exceed the net operating expense ratio of 0.75%. This expense limitation agreement may be changed or terminated only with approval of the Board of Trustees.*

 

**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:

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| | | | | |
|:---|:---|:---|:---|:---|
| | 1 Year | 3 Years | 5 Years | 10 Years |
| Global Sustainable Bond | $80 | $252 | $438 | $975 |

---

**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 37.07% of the average value of its portfolio.

The Fund's increased portfolio turnover can be partially attributed to its adaptation to shifting macroeconomic circumstances as a result of the Federal Open Market Committee's (FOMC) 2024 monetary policy changes.

**Principal Investment Strategies**

Under normal conditions, the Fund invests at least 80% of its net assets in bonds of issuers located throughout the world (including emerging markets) that the Fund's investment adviser believes demonstrate sustainable characteristics. The Fund typically invests in corporate bonds, US and foreign government bonds, municipal bonds, collateralized or securitized bonds, high quality commercial paper, and bank obligations. For purposes of this investment policy, the adviser considers issuers with sustainable characteristics to be those issuers that are more established, consistently profitable, financially strong, and with robust policies in the areas of the environment, social responsibility, and corporate governance.

The adviser employs a fundamental research driven approach to bond selection and portfolio construction. The adviser's focus on sustainability considers financial and nonfinancial characteristics from diverse sources including regulatory filings, market data, and data supplied by third-party vendors. The adviser uses that information to identify issuers with strong balance sheets, capable management teams with a track record of success, good cash flow, prospects for sustainable above-average earnings growth, and to assess issuers' business models, over the long term.

The adviser employs a sustainable rating system based on its own, as well as third-party, data to identify issuers believed to have robust policies and lower risks in the areas of the environment, social responsibility, and corporate governance. 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 alcohol, tobacco, pornography, weapons, gambling, and companies in the business of fossil fuel extraction, production, or refining. The Fund generally does not invest in any company with exposure to the foregoing businesses, but may invest in a company if the company is not primarily engaged in higher sustainability risk businesses or, in in the opinion of the adviser, sustainability risks are mitigated by other factors.

**Saturna Global Sustainable Bond Fund**

**Principal Risks of Investing**

**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:** The adviser believes that 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.

**Interest rate risk:** 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 maturities 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.

**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.

**High yield risk:** Bonds that are unrated or rated below investment grade, which are known as "junk bonds," typically offer higher yields to compensate investors for increased credit risk. Issuers of high-yield securities generally are not as strong financially and are more vulnerable to changes that could affect their ability to make interest and principal payments. High-yield securities generally are more volatile and less liquid (harder to sell), which may make such securities more difficult to value. Unrated securities present additional uncertainty because of the difficulties in determining their comparability to rated securities. Unrated securities are often comparable to below investment-grade securities.

**Foreign investing risk:** 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.

**Emerging markets risk:** There are heightened risks when investing in emerging markets, which are generally less liquid and more volatile than more developed securities markets. These risks include greater political or economic uncertainties; delays and disruptions in securities settlement procedures; weaker corporate governance, accounting, auditing and financial reporting standards; and less publicly available information about issuers. Emerging market countries' governments may also be more likely to impose capital controls or nationalize an industry. The likelihood of suspensions of issuers traded on foreign exchanges may be higher for securities of issuers in emerging or less-developed market countries than in countries with more developed markets.

**Liquidity risk:** Liquidity risk exists when particular investments are difficult to sell and may be more difficult to value. If the Fund is forced to sell these investments during unfavorable conditions to meet redemptions or for other cash needs, the Fund may lose money on its investments. As a result, the Fund may be unable to achieve its objective.

**Performance**

**Annual Total Return**

The following bar chart presents the calendar year total returns of the Fund 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/funds/performance.

![](fp0097954-5_01.jpg)

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| | | |
|:---|:---|:---|
| Best Quarter | Q4 2023 | 5.64% |
| Worst Quarter | Q2 2022 | (4.42)% |

---

**Saturna Global Sustainable Bond Fund**

**Average Annual Total Returns**

The table below presents the average annual returns for 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 and the Life of the Fund compare to those of a broad-based securities market index.

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| | | | | |
|:---|:---|:---|:---|:---|
| *Periods ended December 31, 2025* | *Periods ended December 31, 2025* | *Periods ended December 31, 2025* | *Periods ended December 31, 2025* | *Periods ended December 31, 2025* |
|  | **1 Year** | **5 Years** | **10 Years** | **Life of<br> Fund<sup>1</sup>** |
| Return before taxes | 10.10% | 0.96% | 2.28% | 1.93% |
| Return after taxes on distributions | 8.41% | (0.10)% | 1.25% | 0.92% |
| Return after taxes on distributions and sale of Fund shares | 5.89% | 0.22% | 1.20% | 0.93% |
| **Bloomberg Global Aggregate Bond Index** *(reflects no deduction for fees, expenses, or taxes)* | **Bloomberg Global Aggregate Bond Index** *(reflects no deduction for fees, expenses, or taxes)* | **Bloomberg Global Aggregate Bond Index** *(reflects no deduction for fees, expenses, or taxes)* | **Bloomberg Global Aggregate Bond Index** *(reflects no deduction for fees, expenses, or taxes)* | **Bloomberg Global Aggregate Bond Index** *(reflects no deduction for fees, expenses, or taxes)* |
|  | 8.17% | -2.15% | 1.26% | 1.02% |

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*<sup>1</sup>* *Saturna Sustainable Bond Fund began operations March 27, 2015.*

 

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. 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 their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts.

In loss periods, the average after-tax total return may be higher than the average annual total return because of an assumed deduction of losses from other income.

**Investment Adviser**

Saturna Capital Corporation is the Fund's investment adviser.

**Portfolio Managers**

Mr. Patrick T. Drum MBA, CFA, CFP<sup>®</sup>, fixed income lead and portfolio manager of Saturna Capital Corporation, and Ms. Elizabeth Alm, CFA, senior investment analyst and portfolio manager of Saturna Capital Corporation, are responsible for the Fund's day-to-day management. Mr. Drum has been the Fund's portfolio manager since the Fund's inception in 2015, and Ms. Alm became a portfolio manager for the Fund in 2026. She previously served (since 2019) as the Fund's deputy portfolio manager. Mr. Pierce S. McCrerey, CFA, a fixed income analyst of Saturna Capital Corporation, has been the deputy portfolio manager since 2026.

**Purchase and Sale of Fund Shares**

You may open an account and purchase shares by sending a completed application, a photocopy of a government-issued identity document, and a check made payable to the Saturna Global Sustainable Bond Fund.

The minimum initial investment is $1,000 (for tax-sheltered accounts, there is no minimum).

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:

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| | |
|:---|:---|
| **Written request** |  |
| &nbsp;&nbsp;&nbsp;Write: | Saturna Mutual Funds |
|  | Box N |
|  | Bellingham, WA 98227-0596 |
| &nbsp;&nbsp;&nbsp;Or Fax: | 360-734-0755 |
| &nbsp;&nbsp;&nbsp;Or Email: | investorservices@saturna.com |
| **Telephone request** |  |
| &nbsp;&nbsp;&nbsp;Call: | 888-732-6262 or 360-734-9900 |
| **Online** |  |
| &nbsp;&nbsp;&nbsp;Visit: | www.saturna.com/resources/literature |

---

**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.