# EDGAR Filing Document

**Accession Number:** 0000277751
**File Stem:** 0001193125-26-098235
**Filing Date:** 2026-3
**Character Count:** 2848
**Document Hash:** a239fc80ab7286a4b294a1075fed16f3
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-098235.hdr.sgml**: 20260309

**ACCESSION NUMBER**: 0001193125-26-098235

**CONFORMED SUBMISSION TYPE**: 497J

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20260309

**DATE AS OF CHANGE**: 20260309

**EFFECTIVENESS DATE**: 20260309

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** JANUS INVESTMENT FUND
- **CENTRAL INDEX KEY:** 0000277751

**ORGANIZATION NAME:**
- **EIN:** 840592523
- **STATE OF INCORPORATION:** MA

**FILING VALUES:**
- **FORM TYPE:** 497J
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 002-34393
- **FILM NUMBER:** 26734392

**BUSINESS ADDRESS:**
- **STREET 1:** 151 DETROIT STREET
- **CITY:** DENVER
- **STATE:** CO
- **ZIP:** 80206
- **BUSINESS PHONE:** 303-333-3863

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

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** JANUS FUND /MD/
- **DATE OF NAME CHANGE:** 19870701

## Series and Classes Contracts Data

### Janus Henderson Low Duration Multi-Sector Income Fund (Series ID: S000044287)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000137972 | Class A      | JUCAX           |
| C000137973 | Class C      | JUCCX           |
| C000137974 | Class D      | JUCDX           |
| C000137975 | Class I      | JUCIX           |
| C000137976 | Class N      | JUCNX           |
| C000137977 | Class S      | JUCSX           |
| C000137978 | Class T      | JUCTX           |
| C000151361 | Class R      | JUCRX           |

[Janus Henderson Letterhead]

March 9, 2026

EDGAR Operations Branch

Securities and Exchange Commission

Division of Investment Management

100 F Street, N.E.

Washington, D.C. 20549-0505

Re: JANUS INVESTMENT FUND (the "Registrant")

1933 Act File No. 002-34393

1940 Act File No. 811-01879

Dear Sir or Madam:

Pursuant to Rule 497(j) of Regulation C under the Securities Act of 1933, as amended (the "1933 Act"), the undersigned hereby certifies on behalf of the Registrant:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1. There are no changes to the Prospectuses and Statement of Additional Information ("SAI") from the forms of the Prospectuses and SAI that were filed in Post-Effective Amendment No. 335 ("PEA No. 335") on March 4, 2026, pursuant to Rule 485(b) under the 1933 Act for Janus Hendersom Low Duration Multi-Sector Income Fund (formally named Janus Henderson Absolute Return Income Opportunities Fund), and all share classes thereof.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;2. The text of PEA No. 335 has been filed electronically.

If you have any questions regarding this filing, please call me at (303) 336-7889 or email me at Jay.Mensah@janushenderson.com.

Respectfully,

/s/ Jay Mensah

Jay Mensah

Assistant Secretary

Enclosure (via EDGAR)

cc: Stephanie Grauerholz, Esq.

Thea Kelley