# EDGAR Filing Document

**Accession Number:** 0000917469
**File Stem:** 0001193125-26-277068
**Filing Date:** 2026-6
**Character Count:** 4437
**Document Hash:** 547d49ae6a5df9df2d7f42a6d172f8c5
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-277068.hdr.sgml**: 20260622

**ACCESSION NUMBER**: 0001193125-26-277068

**CONFORMED SUBMISSION TYPE**: 497

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20260622

**DATE AS OF CHANGE**: 20260622

**EFFECTIVENESS DATE**: 20260622

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** LOOMIS SAYLES FUNDS I
- **CENTRAL INDEX KEY:** 0000917469

**ORGANIZATION NAME:**
- **EIN:** 043219179
- **STATE OF INCORPORATION:** MA
- **FISCAL YEAR END:** 0930

**FILING VALUES:**
- **FORM TYPE:** 497
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-22931
- **FILM NUMBER:** 261105852

**BUSINESS ADDRESS:**
- **STREET 1:** 888 BOYLSTON STREET
- **STREET 2:** 8TH FLOOR
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02199
- **BUSINESS PHONE:** 617-449-2810

**MAIL ADDRESS:**
- **STREET 1:** 888 BOYLSTON STREET
- **STREET 2:** 8TH FLOOR
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02199

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** LOOMIS SAYLES FUNDS II
- **DATE OF NAME CHANGE:** 20031119

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** LOOMIS SAYLES INVESTMENT TRUST
- **DATE OF NAME CHANGE:** 20031015

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** LOOMIS SAYLES FUNDS I
- **DATE OF NAME CHANGE:** 20030718

## Series and Classes Contracts Data

### Loomis Sayles Income Fund (Series ID: S000006638)

---

|  |  |  |
|:---|:---|:---|
| Class Name          | Ticker Symbol | Class ID   |
| Institutional Class | LSBDX         | C000018122 |
| Retail Class        | LSBRX         | C000018123 |
| Admin Class         | LBFAX         | C000018124 |
| Class N             | LSBNX         | C000125493 |

---

### Loomis Sayles Global Bond Fund (Series ID: S000006641)

---

|  |  |  |
|:---|:---|:---|
| Class Name          | Ticker Symbol | Class ID   |
| Institutional Class | LSGBX         | C000018127 |
| Retail Class        | LSGLX         | C000018128 |
| Class N             | LSGNX         | C000125494 |

---

## Series and Classes Contracts Data

### Loomis Sayles Income Fund (Series ID: S000006638)

| Class ID   | Class Name          | Ticker Symbol   |
|:---|:---|:---|
| C000018122 | Institutional Class | LSBDX           |
| C000018123 | Retail Class        | LSBRX           |
| C000018124 | Admin Class         | LBFAX           |
| C000125493 | Class N             | LSBNX           |

### Loomis Sayles Global Bond Fund (Series ID: S000006641)

| Class ID   | Class Name          | Ticker Symbol   |
|:---|:---|:---|
| C000018127 | Institutional Class | LSGBX           |
| C000018128 | Retail Class        | LSGLX           |
| C000125494 | Class N             | LSGNX           |

*Supplement dated June 22, 2026 to the Statement of Additional Information, dated February 1, 2026, as may be revised or supplemented from time to time, for the following fund:* 

**LOOMIS SAYLES GLOBAL BOND FUND** 

**(the "Fund")** 

Effective July 1, 2026, the Fund's Board of Trustees approved a proposal to simplify the Fund's management fee rate. The management fee rate will be 0.52% on the first $1 billion of assets, 0.48% on the next $1 billion in assets and 0.40% of amounts in excess of $2 billion in assets. The table regarding advisory fee rates within the sub-section "Advisory Agreements" in the section "Investment Advisory and Other Services" is amended and restated with respect to the Fund as follows:

---

| | |
|:---|:---|
| **Fund** | **Rate** |
| Loomis Sayles Global Bond Fund | 0.52% of the first $1 billion<br> 0.48% of the next $1 billion<br> 0.40% of amounts in excess of $2 billion |

---

------

*Supplement dated June 22, 2026 to the Statement of Additional Information, dated May 1, 2026, as may be revised or supplemented from time to time, for the following fund:* 

**LOOMIS SAYLES INCOME FUND** 

**(the "Fund")** 

Effective July 1, 2026, the Fund's Board of Trustees approved a proposal to simplify the Fund's management fee rate. The management fee rate will be 0.59% of the first $3 billion of assets and 0.48% of the amounts in excess of $3 billion in assets. The table regarding advisory fee rates within the sub-section "Advisory Agreements" in the section "Investment Advisory and Other Services" is amended and restated with respect to the Fund as follows:

---

| | |
|:---|:---|
| **Fund** | **Rate** |
| Loomis Sayles Income Fund | 0.59% of the first $3 billion<br> 0.48% of amounts in excess of $3 billion |

---