v3.26.3
Performance Management
May 31, 2026
Amana Income Fund  
Prospectus [Line Items]  
Bar Chart and Performance Table [Heading] Performance
Performance Narrative [Text Block]

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.

Performance Past Does Not Indicate Future [Text] A fund’s past performance (before and after taxes) is not a guarantee of how a fund will perform in the future.
Performance Information Illustrates Variability of Returns [Text] The bar chart provides an indication of the risks of investing in the Fund by showing changes in performance from year to year.
Bar Chart [Heading] Annual Total Return
Bar Chart [Table]

Bar Chart Closing [Text Block]

Best Quarter

Q2 2020

18.47%

Worst Quarter

Q1 2020

-18.01%

The year-to-date return as of the most recent calendar quarter (which ended June 30, 2026) was 16.64%.

Year to Date Return, Label [Optional Text] year-to-date return
Bar Chart, Year to Date Return 16.64%
Bar Chart, Year to Date Return, Date Jun. 30, 2026
Highest Quarterly Return, Label [Optional Text] Best Quarter
Highest Quarterly Return 18.47%
Highest Quarterly Return, Date Jun. 30, 2020
Lowest Quarterly Return, Label [Optional Text] Worst Quarter
Lowest Quarterly Return (18.01%)
Lowest Quarterly Return, Date Mar. 31, 2020
Performance Table Heading Average Annual Total Returns
Performance Table Narrative

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 for the life of the Fund compare to those of a broad-based securities market index and an additional index with characteristics relevant to the Fund’s investment strategy.

Performance Table Uses Highest Federal Rate 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.
Performance Table Not Relevant to Tax Deferred 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.
Performance Table Explanation after Tax Higher 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.
Performance [Table]

Periods ended December 31, 2025

 

1 Year

5 Years

10 Years

Life of
Fund

Income Fund Investor Shares (AMANX)

 

Return before taxes

16.37%

10.77%

11.62%

9.25%1

Return after taxes on distributions

14.98%

9.39%

10.20%

8.29%1

Return after taxes on distributions and sale of Fund shares

10.57%

8.79%

9.20%

6.95%1

Income Fund Institutional Shares (AMINX)

 

Return before taxes

16.65%

11.04%

11.88%

10.88%2

Bloomberg US Large Cap Index (reflects no deduction for fees, expenses, or taxes)

 

18.03%

14.00%

14.93%

14.16%2

Bloomberg 1000 Value Index (reflects no deduction for fees, expenses, or taxes)

 

16.53%

12.66%

11.07%

10.56%2

​1   Amana Income Fund Investor Shares began operations June 23, 1986.

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

Performance Table One Class of after Tax Shown [Text] After-tax returns illustrated are only for the Investor Shares; after-tax returns for Institutional Shares will vary.
Index No Deduction for Fees, Expenses, or Taxes [Text] reflects no deduction for fees, expenses, or taxes
Performance Table Closing [Text Block]

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.

Performance Availability Website Address [Text] www.saturna.com/resources/literature
Amana Growth Fund  
Prospectus [Line Items]  
Bar Chart and Performance Table [Heading] Performance
Performance Narrative [Text Block]

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.

Performance Past Does Not Indicate Future [Text] A fund’s past performance (before and after taxes) is not a guarantee of how a fund will perform in the future.
Performance Information Illustrates Variability of Returns [Text] The bar chart provides an indication of the risks of investing in the Fund by showing changes in performance from year to year.
Bar Chart [Heading] Annual Total Return
Bar Chart [Table]

Bar Chart Closing [Text Block]

Best Quarter

Q2 2020

22.63%

Worst Quarter

Q2 2022

-14.52%

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

Year to Date Return, Label [Optional Text] year-to-date return
Bar Chart, Year to Date Return 19.39%
Bar Chart, Year to Date Return, Date Jun. 30, 2026
Highest Quarterly Return, Label [Optional Text] Best Quarter
Highest Quarterly Return 22.63%
Highest Quarterly Return, Date Jun. 30, 2020
Lowest Quarterly Return, Label [Optional Text] Worst Quarter
Lowest Quarterly Return (14.52%)
Lowest Quarterly Return, Date Jun. 30, 2022
Performance Table Heading Average Annual Total Returns
Performance Table Narrative

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.

Performance Table Uses Highest Federal Rate 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.
Performance Table Not Relevant to Tax Deferred 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.
Performance Table Explanation after Tax Higher 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.
Performance [Table]

Periods ended December 31, 2025

 

1 Year

5 Years

10 Years

Life of
Fund

Growth Fund Investor Shares (AMAGX)

 

Return before taxes

17.62%

12.64%

16.38%

12.07%1

Return after taxes on distributions

17.62%

12.20%

15.24%

11.52%1

Return after taxes on distributions and sale of Fund shares

10.43%

9.95%

12.74%

10.31%1

Growth Fund Institutional Shares (AMIGX)

 

Return before taxes

17.89%

12.91%

16.66%

15.37%2

Bloomberg US Large Cap Index (reflects no deduction for fees, expenses, or taxes)

 

18.03%

14.00%

14.93%

14.16%2

Bloomberg 1000 Growth Index (reflects no deduction for fees, expenses, or taxes)

 

17.93%

13.60%

16.60%

15.93%2

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.

Performance Table One Class of after Tax Shown [Text] After-tax returns illustrated are only for the Investor Shares; after-tax returns for Institutional Shares will vary.
Index No Deduction for Fees, Expenses, or Taxes [Text] reflects no deduction for fees, expenses, or taxes
Performance Table Closing [Text Block]

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.

Performance Availability Website Address [Text] www.saturna.com/resources/literature
Amana Developing World Fund  
Prospectus [Line Items]  
Bar Chart and Performance Table [Heading] Performance
Performance Narrative [Text Block]

Annual Total Return

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

Performance Past Does Not Indicate Future [Text] A fund’s past performance (before and after taxes) is not a guarantee of how a fund will perform in the future.
Performance Information Illustrates Variability of Returns [Text] The bar chart provides an indication of the risks of investing in the Fund by showing changes in performance from year to year.
Bar Chart [Heading] Annual Total Return
Bar Chart [Table]

Bar Chart Closing [Text Block]

Best Quarter

Q4 2020

19.46%

Worst Quarter

Q1 2020

-17.50%

The year-to-date return as of the most recent calendar quarter (which ended June 30, 2026) was 13.13%.

Year to Date Return, Label [Optional Text] year-to-date return
Bar Chart, Year to Date Return 13.13%
Bar Chart, Year to Date Return, Date Jun. 30, 2026
Highest Quarterly Return, Label [Optional Text] Best Quarter
Highest Quarterly Return 19.46%
Highest Quarterly Return, Date Dec. 31, 2020
Lowest Quarterly Return, Label [Optional Text] Worst Quarter
Lowest Quarterly Return (17.50%)
Lowest Quarterly Return, Date Mar. 31, 2020
Performance Table Heading Average Annual Total Returns
Performance Table Narrative

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 for the life of the Fund compare to those of a broad-based securities market index.

Performance Table Uses Highest Federal Rate 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.
Performance Table Not Relevant to Tax Deferred 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.
Performance Table Explanation after Tax Higher 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.
Performance [Table]

Periods ended December 31, 2025

 

1 Year

5 Years

10 Years

Life of
Fund

Developing World Fund Investor Shares (AMDWX)

Return before taxes

19.94%

5.13%

6.70%

3.31%1

Return after taxes on distributions

18.92%

4.68%

6.45%

3.14%1

Return after taxes on distributions and sale of Fund shares

12.11%

3.81%

5.31%

2.58%1

Developing World Fund Institutional Shares (AMIDX)

Return before taxes

20.24%

5.35%

6.91%

3.93%2

Bloomberg Emerging Markets Large, Mid & Small Index (reflects no deduction for fees, expenses, or taxes)

 

29.21%

4.54%

8.93%

6.20%2

​1  Amana Developing World Fund Investor Shares began operations September 28, 2009.

2  Amana Developing World Fund Institutional Shares began operations September 25, 2013, and the Life of Fund return for the Bloomberg Emerging Markets Large, Mid & Small Index is shown since this date.

Performance Table One Class of after Tax Shown [Text] After-tax returns illustrated are only for the Fund’s Investor Shares; after-tax returns for Institutional Shares will vary.
Index No Deduction for Fees, Expenses, or Taxes [Text] reflects no deduction for fees, expenses, or taxes
Performance Table Closing [Text Block]

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 Fund’s 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.

Performance Availability Website Address [Text] www.saturna.com/resources/literature
Amana Participation Fund  
Prospectus [Line Items]  
Bar Chart and Performance Table [Heading] Performance
Performance Narrative [Text Block]

Annual Total Return

The following bar chart presents the calendar year total returns of the Fund Institutional Shares before taxes (Institutional Shares are used for this chart because they represent the largest share class of the Fund). 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.

Performance Past Does Not Indicate Future [Text] A fund’s past performance (before and after taxes) is not a guarantee of how a fund will perform in the future.
Performance Information Illustrates Variability of Returns [Text] The bar chart provides an indication of the risks of investing in the Fund by showing changes in performance from year to year.
Bar Chart [Heading] Annual Total Return
Bar Chart [Table]

Bar Chart Closing [Text Block]

Best Quarter

Q2 2020

5.50%

Worst Quarter

Q1 2020

-3.44%

The year-to-date return as of the most recent calendar quarter (which ended June 30, 2026) was 2.00%.

Year to Date Return, Label [Optional Text] year-to-date return
Bar Chart, Year to Date Return 2.00%
Bar Chart, Year to Date Return, Date Jun. 30, 2026
Highest Quarterly Return, Label [Optional Text] Best Quarter
Highest Quarterly Return 5.50%
Highest Quarterly Return, Date Jun. 30, 2020
Lowest Quarterly Return, Label [Optional Text] Worst Quarter
Lowest Quarterly Return (3.44%)
Lowest Quarterly Return, Date Mar. 31, 2020
Performance Table Heading Average Annual Total Returns
Performance Table Narrative

The table below presents the average annual returns of the Participation Fund and provides an indication of the risks of investing in the Fund by showing how the Fund’s average annual returns for the previous 1 and 5 years and since the Fund’s inception on September 28, 2015, compare to those of a broad-based securities market index and an additional index with characteristics relevant to the Fund’s investment strategy.

Performance Table Uses Highest Federal Rate 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.
Performance Table Not Relevant to Tax Deferred 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.
Performance Table Explanation after Tax Higher 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.
Performance [Table]

Periods ended December 31, 2025

 

1 Year

5 Years

10 Years

Life of
Fund
1

Participation Fund Investor Shares (AMAPX)

 

Return before taxes

5.97%

1.46%

2.39%

2.25%

Participation Fund Institutional Shares (AMIPX)

 

Return before taxes

6.32%

1.71%

2.63%

2.50%

Return after taxes on distributions

4.68%

0.58%

1.55%

1.45%

Return after taxes on distributions and sale of Fund shares

3.69%

0.76%

1.44%

1.36%

Bloomberg Global Aggregate Bond Index (reflects no deduction for fees, expenses, or taxes)

 

8.17%

(2.15)%

1.26%

1.14%

Bloomberg Custom Sukuk Index (reflects no deduction for fees, expenses, or taxes)

 

7.45%

n/a

n/a

n/a

​1   Amana Participation Fund began operations September 28, 2015.

Performance Table One Class of after Tax Shown [Text] After-tax returns illustrated are only for the Investor Shares; after-tax returns for Institutional Shares will vary.
Index No Deduction for Fees, Expenses, or Taxes [Text] reflects no deduction for fees, expenses, or taxes
Performance Table Closing [Text Block]

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.

Performance Availability Website Address [Text] www.saturna.com/resources/literature