# EDGAR Filing Document

**Accession Number:** 0000809707
**File Stem:** 0001655589-26-000817
**Filing Date:** 2026-6
**Character Count:** 2085
**Document Hash:** fe34bbee1a99a21d90eed4255e3c4f0e
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001655589-26-000817.hdr.sgml**: 20260603

**ACCESSION NUMBER**: 0001655589-26-000817

**CONFORMED SUBMISSION TYPE**: 497K

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20260603

**DATE AS OF CHANGE**: 20260603

**EFFECTIVENESS DATE**: 20260603

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Franklin Investors Securities Trust
- **CENTRAL INDEX KEY:** 0000809707

**ORGANIZATION NAME:**
- **EIN:** 000000000
- **STATE OF INCORPORATION:** FL
- **FISCAL YEAR END:** 1031

**FILING VALUES:**
- **FORM TYPE:** 497K
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 033-11444
- **FILM NUMBER:** 261059416

**BUSINESS ADDRESS:**
- **STREET 1:** ONE FRANKLIN PARKWAY
- **CITY:** SAN MATEO
- **STATE:** CA
- **ZIP:** 94403-1906
- **BUSINESS PHONE:** 650-312-2200

**MAIL ADDRESS:**
- **STREET 1:** ONE FRANKLIN PARKWAY
- **CITY:** SAN MATEO
- **STATE:** CA
- **ZIP:** 94403-1906

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** FRANKLIN INVESTORS SECURITIES TRUST
- **DATE OF NAME CHANGE:** 19920703

## Series and Classes Contracts Data

### Franklin Long Duration Credit Fund (Series ID: S000081420)

| Class ID   | Class Name    | Ticker Symbol   |
|:---|:---|:---|
| C000244290 | Class R6      | FLDBX           |
| C000244291 | Class A       |  |
| C000244292 | Class R       |  |
| C000244293 | Advisor Class |  |

#### 814-P1 06/26

#### FRANKLIN INVESTORS SECURITIES TRUST

#### SUPPLEMENT DATED JUNE 3, 2026

#### TO THE SUMMARY PROSPECTUS, PROSPECTUS

#### AND STATEMENT OF ADDITIONAL INFORMATION ("SAI"),

#### EACH DATED MARCH 1, 2026, OF
**FRANKLIN LONG DURATION CREDIT FUND (THE "FUND")**

<br>**Effective June 10, 2026, Advisor Class shares of the Fund are available for purchase.** 

#### The information below replaces in its entirety the corresponding information on the cover of the Fund's Summary Prospectus, Prospectus and SAI.

---

| | | | |
|:---|:---|:---|:---|
| **Class A** | **Class R** | **Class R6** | **Advisor Class** |
|  |  | FLDBX | FVLDX |

---

#### Please retain this supplement for future reference.

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