# EDGAR Filing Document

**Accession Number:** 0000906185
**File Stem:** 0001193125-26-025123
**Filing Date:** 2026-1
**Character Count:** 10499
**Document Hash:** 38fccff6666de1236e8dc4deb839d020
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-025123.hdr.sgml**: 20260128

**ACCESSION NUMBER**: 0001193125-26-025123

**CONFORMED SUBMISSION TYPE**: 497

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20260128

**DATE AS OF CHANGE**: 20260127

**EFFECTIVENESS DATE**: 20260128

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** JANUS ASPEN SERIES
- **CENTRAL INDEX KEY:** 0000906185

**ORGANIZATION NAME:**
- **EIN:** 841235540
- **STATE OF INCORPORATION:** MA
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 497
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 033-63212
- **FILM NUMBER:** 26567559

**BUSINESS ADDRESS:**
- **STREET 1:** 151 DETROIT STREET
- **CITY:** DENVER
- **STATE:** CO
- **ZIP:** 80206
- **BUSINESS PHONE:** 3033333863

**MAIL ADDRESS:**
- **STREET 1:** 151 DETROIT STREET
- **CITY:** DENVER
- **STATE:** CO
- **ZIP:** 80206

## Series and Classes Contracts Data

### Janus Henderson Balanced Portfolio (Series ID: S000010394)

---

|  |  |  |
|:---|:---|:---|
| Class Name           | Ticker Symbol | Class ID   |
| Service Shares       | nan           | C000028716 |
| Institutional Shares | JABLX         | C000028717 |

---

### Janus Henderson Research Portfolio (Series ID: S000010395)

---

|  |  |  |
|:---|:---|:---|
| Class Name           | Ticker Symbol | Class ID   |
| Service Shares       | nan           | C000028718 |
| Institutional Shares | JAGRX         | C000028719 |

---

### Janus Henderson Enterprise Portfolio (Series ID: S000010396)

---

|  |  |  |
|:---|:---|:---|
| Class Name           | Ticker Symbol | Class ID   |
| Service Shares       | nan           | C000028720 |
| Institutional Shares | JAAGX         | C000028721 |

---

### Janus Henderson Mid Cap Value Portfolio (Series ID: S000010397)

---

|  |  |  |
|:---|:---|:---|
| Class Name           | Ticker Symbol | Class ID   |
| Service Shares       | nan           | C000028722 |
| Institutional Shares | JAMVX         | C000028723 |

---

### Janus Henderson Global Research Portfolio (Series ID: S000010402)

---

|  |  |  |
|:---|:---|:---|
| Class Name           | Ticker Symbol | Class ID   |
| Service Shares       | nan           | C000028728 |
| Institutional Shares | JAWGX         | C000028730 |

---

### Janus Henderson Flexible Bond Portfolio (Series ID: S000010404)

---

|  |  |  |
|:---|:---|:---|
| Class Name           | Ticker Symbol | Class ID   |
| Service Shares       | nan           | C000028733 |
| Institutional Shares | JAFLX         | C000028734 |

---

### Janus Henderson Forty Portfolio (Series ID: S000010406)

---

|  |  |  |
|:---|:---|:---|
| Class Name           | Ticker Symbol | Class ID   |
| Service Shares       | nan           | C000028736 |
| Institutional Shares | JACAX         | C000028737 |

---

### Janus Henderson Global Technology and Innovation Portfolio (Series ID: S000010408)

---

|  |  |  |
|:---|:---|:---|
| Class Name           | Ticker Symbol | Class ID   |
| Service Shares       | nan           | C000028740 |
| Institutional Shares | JGLTX         | C000028742 |

---

### Janus Henderson Overseas Portfolio (Series ID: S000010410)

---

|  |  |  |
|:---|:---|:---|
| Class Name           | Ticker Symbol | Class ID   |
| Service Shares       | nan           | C000028745 |
| Institutional Shares | JAIGX         | C000028747 |

---

### Janus Henderson Global Sustainable Equity Portfolio (Series ID: S000074910)

---

|  |  |  |
|:---|:---|:---|
| Class Name           | Ticker Symbol | Class ID   |
| Institutional Shares | JHISX         | C000233309 |
| Service Shares       | nan           | C000233310 |

---

## Series and Classes Contracts Data

### Janus Henderson Balanced Portfolio (Series ID: S000010394)

| Class ID   | Class Name           | Ticker Symbol   |
|:---|:---|:---|
| C000028716 | Service Shares       |  |
| C000028717 | Institutional Shares | JABLX           |

### Janus Henderson Research Portfolio (Series ID: S000010395)

| Class ID   | Class Name           | Ticker Symbol   |
|:---|:---|:---|
| C000028718 | Service Shares       |  |
| C000028719 | Institutional Shares | JAGRX           |

### Janus Henderson Enterprise Portfolio (Series ID: S000010396)

| Class ID   | Class Name           | Ticker Symbol   |
|:---|:---|:---|
| C000028720 | Service Shares       |  |
| C000028721 | Institutional Shares | JAAGX           |

### Janus Henderson Mid Cap Value Portfolio (Series ID: S000010397)

| Class ID   | Class Name           | Ticker Symbol   |
|:---|:---|:---|
| C000028722 | Service Shares       |  |
| C000028723 | Institutional Shares | JAMVX           |

### Janus Henderson Global Research Portfolio (Series ID: S000010402)

| Class ID   | Class Name           | Ticker Symbol   |
|:---|:---|:---|
| C000028728 | Service Shares       |  |
| C000028730 | Institutional Shares | JAWGX           |

### Janus Henderson Flexible Bond Portfolio (Series ID: S000010404)

| Class ID   | Class Name           | Ticker Symbol   |
|:---|:---|:---|
| C000028733 | Service Shares       |  |
| C000028734 | Institutional Shares | JAFLX           |

### Janus Henderson Forty Portfolio (Series ID: S000010406)

| Class ID   | Class Name           | Ticker Symbol   |
|:---|:---|:---|
| C000028736 | Service Shares       |  |
| C000028737 | Institutional Shares | JACAX           |

### Janus Henderson Global Technology and Innovation Portfolio (Series ID: S000010408)

| Class ID   | Class Name           | Ticker Symbol   |
|:---|:---|:---|
| C000028740 | Service Shares       |  |
| C000028742 | Institutional Shares | JGLTX           |

### Janus Henderson Overseas Portfolio (Series ID: S000010410)

| Class ID   | Class Name           | Ticker Symbol   |
|:---|:---|:---|
| C000028745 | Service Shares       |  |
| C000028747 | Institutional Shares | JAIGX           |

### Janus Henderson Global Sustainable Equity Portfolio (Series ID: S000074910)

| Class ID   | Class Name           | Ticker Symbol   |
|:---|:---|:---|
| C000233309 | Institutional Shares | JHISX           |
| C000233310 | Service Shares       |  |

## Janus Aspen Series

---

| | |
|:---|:---|
| Janus Henderson Balanced Portfolio | Janus Henderson Global Sustainable Equity Portfolio |
| Janus Henderson Enterprise Portfolio | Janus Henderson Global Technology and Innovation Portfolio |
| Janus Henderson Flexible Bond Portfolio | Janus Henderson Mid Cap Value Portfolio |
| Janus Henderson Forty Portfolio | Janus Henderson Overseas Portfolio |
| Janus Henderson Global Research Portfolio | Janus Henderson Research Portfolio |

---

(the "Portfolios")

Supplement dated January 28, 2026

to Currently Effective Statements of Additional Information

The Board of Trustees (the "Board") of Janus Aspen Series (the "Trust") has unanimously appointed Gwen L. Shaneyfelt to serve as a Trustee-Advisor of the Trust, effective January 1, 2026, at the recommendation of the Board's Nominating and Governance Committee. Ms. Shaneyfelt is considered "independent," meaning that she is not affiliated with the Trust or Janus Henderson Investors US LLC, the Portfolios' investment adviser, or its related entities.

Accordingly, effective immediately, the statements of additional information ("SAIs") for the Portfolios are updated as follows:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1. In the **Trustees and Officers** section of the Portfolios' SAIs, the following information is added
to the table titled **"Trustees"**:

---

| | | | | | |
|:---|:---|:---|:---|:---|:---|
| &nbsp;&nbsp;&nbsp; **Name, Address,**<br> **and Age** | **Positions**<br> **Held with**<br> **the Trust** | **Length of**<br> **Time Served** | **Principal Occupations**<br> **During the Past Five Years** | **Number of**<br> **Portfolios/Funds**<br> **in Fund Complex**<br> **Overseen by**<br> **Trustee** | **Other Directorships**<br> **Held by Trustee**<br> **During the Past Five Years** |
| &nbsp;&nbsp;&nbsp;**Trustee-Advisor** | &nbsp;&nbsp;&nbsp;**Trustee-Advisor** | &nbsp;&nbsp;&nbsp;**Trustee-Advisor** | &nbsp;&nbsp;&nbsp;**Trustee-Advisor** | &nbsp;&nbsp;&nbsp;**Trustee-Advisor** | &nbsp;&nbsp;&nbsp;**Trustee-Advisor** |
| &nbsp;&nbsp;&nbsp; Gwen L. Shaneyfelt\*<br> 151 Detroit Street<br> Denver, CO 80206<br> DOB: 1962 | Trustee-Advisor | 1/26-Present | Retired. Formerly, Chief Administrative Officer and Executive Vice President, Franklin Resources, Inc. ("Franklin") (global asset management firm) (January 2024—December 1, 2025), and Chief Accounting Officer and Executive Vice President, (June 2019-January 2024), and officer and/or director of certain subsidiaries of Franklin, including as Vice President and Chief Financial Officer, Legg Mason, Inc., and Senior Vice President, Franklin Templeton Companies, LLC (2011-2025). | N/A | Board Member, Desert Foothills Lutheran Church and School (2022-present). Formerly, Director or Manager for several Franklin subsidiaries, including Director, ClearBridge Investments LLC and Manager of Royce & Associates GP, LLC (2020-2025), Director, Franklin Templeton Fund Management Limited and Franklin Templeton Australia Limited (2019-2025), and Manager, Franklin Templeton International Services S.à r.l. (2013-2025). |

---

\*Appointed Trustee-Advisor to the Trustees effective January 1, 2026; Shareholders of the Trust are expected to be asked to elect Ms. Shaneyfelt as a Trustee at a future shareholder meeting.

------

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;2. In the **Trustees and Officers** section of the Portfolios' SAIs, the following paragraph is added as
the ninth paragraph following the table titled **"Officers"**:

**Gwen L. Shaneyfelt:** Service as Executive Vice President and Chief Accounting Officer of a global asset management firm and as an officer and/or director of various subsidiaries of the firm, a certified public accountant, an executive director of tax of the investment management unit of a diversified financial services firm, and as prior chairperson of the Investment Company Institute's Tax and Advisor/Distributor Tax committees. Trustee-Advisor since January 1, 2026.

In addition, effective December 31, 2025, Diane L. Wallace, a member of the Board of the Trust, retired from her role as an Independent Trustee of the Trust.

All references to Ms. Wallace serving in the capacity as an Independent Trustee of the Trust are deleted to reflect this change in Board composition.

**Please retain this Supplement with your records.**