# EDGAR Filing Document

**Accession Number:** 0001121257
**File Stem:** 0001121257-26-000006
**Filing Date:** 2026-1
**Character Count:** 7931
**Document Hash:** 0540f95acaebf7fad36e292659a48633
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001121257-26-000006.hdr.sgml**: 20260123

**ACCESSION NUMBER**: 0001121257-26-000006

**CONFORMED SUBMISSION TYPE**: 497

**PUBLIC DOCUMENT COUNT**: 2

**FILED AS OF DATE**: 20260123

**DATE AS OF CHANGE**: 20260123

**EFFECTIVENESS DATE**: 20260123

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** JNL INVESTORS SERIES TRUST
- **CENTRAL INDEX KEY:** 0001121257

**ORGANIZATION NAME:**
- **EIN:** 000000000
- **STATE OF INCORPORATION:** MA
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 497
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-43300
- **FILM NUMBER:** 26554400

**BUSINESS ADDRESS:**
- **STREET 1:** 1 CORPORATE WAY
- **STREET 2:** ATTN: LEGAL DEPARTMENT
- **CITY:** LANSING
- **STATE:** MI
- **ZIP:** 48951
- **BUSINESS PHONE:** (517)381-5500

**MAIL ADDRESS:**
- **STREET 1:** 1 CORPORATE WAY
- **STREET 2:** 8N41
- **CITY:** LANSING
- **STATE:** MI
- **ZIP:** 48951

## Series and Classes Contracts Data

### JNL GOVERNMENT MONEY MARKET FUND (Series ID: S000001684)

---

|  |  |
|:---|:---|
| Class Name                                  | Class ID   |
| JNL Government Money Market Fund (Class I)  | C000004572 |
| JNL Government Money Market Fund (Class SL) | C000243435 |

---

## Series and Classes Contracts Data

### JNL GOVERNMENT MONEY MARKET FUND (Series ID: S000001684)

| Class ID   | Class Name                                  | Ticker Symbol   |
|:---|:---|:---|
| C000004572 | JNL Government Money Market Fund (Class I)  |  |
| C000243435 | JNL Government Money Market Fund (Class SL) |  |

**Supplement Dated January 23, 2026**

**To The Statement of Additional Information**

**Dated April 28, 2025**

**JNL<sup>®</sup> Investors Series Trust**

All changes are effective January 1, 2026.

 

*Under "**Shareholder Communications with Trustees**," please delete the paragraph in the entirety and replace with the following:*

 

Shareholders of the Funds can communicate directly with the Board of Trustees ("Trustees") by writing to the Chair of the Board, Mark S. Wehrle, P.O. Box 30902, Lansing, MI 48909-8402. Shareholders can communicate directly with an individual Trustee by writing to that Trustee at P.O. Box 30902, Lansing, MI 48909-8402. Such communications to the Board or individual Trustees are not screened before being delivered to the addressee.

 

 

*On page 22, in the section, "**Trustees and Officers of the Trust**," please delete the table rows and corresponding footnotes for Mark S. Wehrle and Edward C. Wood in the entirety and replace with the following:*

 

---

| | |
|:---|:---|
| &nbsp;&nbsp;**Name, Address, and (Age)** | &nbsp;&nbsp;**Number of Portfolios in Fund Complex Overseen by Trustee** |
| &nbsp;&nbsp;**Interested Trustee** | &nbsp;&nbsp;**Interested Trustee** |
| &nbsp;&nbsp; <br> Mark S. Wehrle (68)<br> 1 Corporate Way<br> Lansing, MI 48951<br>&nbsp;&nbsp; <br> Chair of the Board <sup>3</sup><br> (1/2026 to present)<br>Trustee <sup>2</sup> <br> (1/2018 to present)<br>| &nbsp;&nbsp; <br> 134 |
| &nbsp;&nbsp; **Principal Occupation(s) During Past 5 Years:**<br> Retired Certified Public Accountant (1/2011 to present) | &nbsp;&nbsp; **Principal Occupation(s) During Past 5 Years:**<br> Retired Certified Public Accountant (1/2011 to present) |
| &nbsp;&nbsp; **Other Directorships Held by Trustee During Past 5 Years:**<br> None | &nbsp;&nbsp; **Other Directorships Held by Trustee During Past 5 Years:**<br> None |
| &nbsp;&nbsp; <br> Edward C. Wood (69)<br> 1 Corporate Way<br> Lansing, MI 48951<br>&nbsp;&nbsp; <br> Trustee <sup>2</sup> <br> (12/2013 to present)<br>Chair of the Board<br> (1/2020 to 12/2025)<br>| &nbsp;&nbsp; <br> 134 |
| &nbsp;&nbsp; **Principal Occupation(s) During Past 5 Years:**<br> None | &nbsp;&nbsp; **Principal Occupation(s) During Past 5 Years:**<br> None |
| &nbsp;&nbsp; **Other Directorships Held by Trustee During Past 5 Years:**<br> None | &nbsp;&nbsp; **Other Directorships Held by Trustee During Past 5 Years:**<br> None |
| <sup>2</sup> The Interested Trustee and the Independent Trustees are elected to serve for an indefinite term. | <sup>2</sup> The Interested Trustee and the Independent Trustees are elected to serve for an indefinite term. |
| <sup>3</sup> The Board Chairperson may be reelected for a second three-year term. If the Board Chairperson has served two consecutive terms, he or she may not serve again as the Board Chairperson, unless at least one year has elapsed since the end of his or her second consecutive term as Board Chairperson. | <sup>3</sup> The Board Chairperson may be reelected for a second three-year term. If the Board Chairperson has served two consecutive terms, he or she may not serve again as the Board Chairperson, unless at least one year has elapsed since the end of his or her second consecutive term as Board Chairperson. |

---

 

*On page 25, in the section, "**Trustees and Officers of the Trust**," under "**Committees of the Board of Trustees**," please delete the first and second paragraphs in the entirety and replace with the following:*

 

The Audit Committee assists the Board of Trustees in fulfilling its oversight responsibilities by providing oversight with respect to the preparation and review of the financial reports and other financial information provided by the Trust to the public or government agencies. The Audit Committee is responsible for the selection, subject to ratification by the Board, of the Trust's independent registered public accounting firm, and for the approval of the auditor's fee. The Audit Committee also reviews the Trust's internal controls regarding finance, accounting, legal compliance and the Trust's

auditing, accounting and financial processes generally. The Audit Committee also serves as the Trust's "Qualified Legal Compliance Committee", for the confidential receipt, retention, and consideration of reports of evidence of material violations under rules of the SEC. Messrs. Anyah, Bouchard, Rybak, and Ms. Woodworth are members of the Audit Committee. Mr. Rybak serves as Chair of the Audit Committee. Mr. Wehrle is an ex officio member of the Audit Committee. The Audit Committee had seven meetings in the last fiscal year.

The Governance Committee is responsible for, among other things, the identification, evaluation and nomination of potential candidates to serve on the Board of Trustees. The Governance Committee will accept Trustee nominations from shareholders. Any such nominations should be sent to the Trust's Governance Committee, c/o Chair of the Governance Committee, John W. Gillespie, P.O. Box 30902, Lansing, Michigan 48909-8402. Ms. Carnahan, and Messrs. Gillespie and Wood are members of the Governance Committee. Mr. Gillespie serves as Chair of the Governance Committee. Mr. Wehrle is an ex officio member of the Governance Committee. The Governance Committee had six meetings in the last fiscal year.

 

 

*On page 27, in the section, "**Trustees and Officers of the Trust**," under "**Trustee Compensation**," please delete the first paragraph in the entirety and replace with the following:*

 

**Trustee Compensation**

The Trustee who is an "interested person" receives no compensation from the Trust. Effective January 1, 2026, each Independent Trustee is paid by the Fund Complex an annual retainer of $375,000. The fees are allocated to the funds within the Fund Complex on a pro-rata basis based on net assets. The Chairman of the Board of Trustees receives an additional annual retainer of $110,000. The Chair of the Audit Committee receives an additional annual retainer of $35,000 for services in that capacity. The Chair of the Governance Committee receives an additional annual retainer of $30,000 for services in that capacity. The Chair of each Investment Committee receives an additional annual retainer of $30,000 for services in that capacity.

 

*This Supplement is dated January 23, 2026.*