SECURITIES AND EXCHANGE COMMISSIONWASHINGTON, D.C. 20549

FORM N-1A

REGISTRATION STATEMENT UNDERTHE SECURITIES ACT OF 1933POST-EFFECTIVE AMENDMENT NO. 46andREGISTRATION STATEMENT UNDERTHE INVESTMENT COMPANY ACT OF 1940POST-EFFECTIVE AMENDMENT NO. 46

**SATURNA INVESTMENT TRUST**(Exact Name of Registrant as Specified in Charter)

1300 North State StreetBellingham, Washington 98225-4730(Address of Principal Executive Offices)

Registrant's Telephone Number — (360) 594-9900

Thomas R. Phillips, Esq.1300 North State StreetBellingham, Washington 98225-4730(Name and Address of Agent for Service)

It is proposed that this filing will become effective:

[X] Immediately upon filing pursuant to paragraph (b)[   ] on _________ pursuant to paragraph (b)[   ] 60 days after filing pursuant to paragraph (a)(1)[   ] on _________ pursuant to paragraph (a)(1)[   ] 75 days after filing pursuant to paragraph (a)(2)[   ] on _________ pursuant to paragraph (a)(2) of rule 485

[   ] this post-effective amendment designates a new effective date for a previously filed post-effective amendment.

EXPLANATORY NOTE

This amendment is being filed solely to submit exhibits containing risk/return summary information in interactive data format that is identical to the risk/return information filed as part of Post-Effective Amendment No. 45 filed on April 15, 2015.

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### Exhibits

Exhibits included with this filing: 

(1) XBRL Instance Document filed as Exhibit Ex-101.ins. 

(2) XBRL Taxonomy Extension Schema Document filed as Exhibit  EX-101.sch.

(3) XBRL Taxonomy Extension Labels Linkbase filed as Exhibit EX-101.lab. 

(4) XBRL Taxonomy Extension Presentation Linkbase Document filed as Exhibit EX-101.pre.

(5) XBRL Taxonomy Extension Definition Linkbase filed as Exhibit EX-101.def.

(6) XBRL Taxonomy Extension Calculation Linkbase filed as Exhibit EX-101.cal.

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### Signatures

Pursuant to the requirements of the Securities Act of 1933 and the Investment Company Act of 1940, the Trust has duly caused this registration statement to be duly signed on its behalf by the undersigned, duly authorized, in the City of Bellingham, State of Washington, on the 15th day of April, 2015. 

**SATURNA INVESTMENT TRUST**

By */s/ Nicholas F. Kaiser*Nicholas F. Kaiser,President

Pursuant to the requirements of the Securities Act of 1933 and the Investment Company Act of 1940, this amendment has been signed below by the following persons in the capacities and on the date indicated.

| Signature                                                                                                                                                                    | Title                                           | Date           |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-------------------------------------------------|----------------|
| */s/ Nicholas F. Kaiser*Nicholas F. Kaiser                                                                                                                                   | President; Trustee(Principal Executive Officer) | April 15, 2015 |
| */s/ Christopher R. Fankhauser*Christopher R. Fankhauser                                                                                                                     | Treasurer(Principal Financial Officer)          | April 15, 2015 |
| ** John E. Love** Ronald H. Fielding** Gary A. Goldfogel** Herbert G. Grubel

** By */s/ Nicholas F. Kaiser*        Nicholas F. Kaiser, Attorney-in-fact | All other Trustees                              | April 15, 2015 |

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