# EDGAR Filing Document

**Accession Number:** 0000917469
**File Stem:** 0001193125-25-305353
**Filing Date:** 2025-12
**Character Count:** 10862
**Document Hash:** 4e6a423fb345f4f735872e9eafc4b896
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-25-305353.hdr.sgml**: 20251202

**ACCESSION NUMBER**: 0001193125-25-305353

**CONFORMED SUBMISSION TYPE**: 497

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20251202

**DATE AS OF CHANGE**: 20251202

**EFFECTIVENESS DATE**: 20251202

**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:** 251543704

**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 Bond 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 Securitized Asset Fund (Series ID: S000006639)

---

|  |  |  |
|:---|:---|:---|
| Class Name          | Ticker Symbol | Class ID   |
| Institutional Class | LSSAX         | C000018125 |

---

### Loomis Sayles Fixed Income Fund (Series ID: S000006640)

---

|  |  |  |
|:---|:---|:---|
| Class Name          | Ticker Symbol | Class ID   |
| Institutional Class | LSFIX         | C000018126 |

---

### 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 |

---

### Loomis Sayles High Income Opportunities Fund (Series ID: S000006642)

---

|  |  |  |
|:---|:---|:---|
| Class Name          | Ticker Symbol | Class ID   |
| Institutional Class | LSIOX         | C000018129 |

---

### Loomis Sayles Inflation Protected Securities Fund (Series ID: S000006643)

---

|  |  |  |
|:---|:---|:---|
| Class Name          | Ticker Symbol | Class ID   |
| Institutional Class | LSGSX         | C000018130 |
| Retail Class        | LIPRX         | C000089752 |
| Class N             | LIPNX         | C000182246 |

---

### Loomis Sayles Institutional High Income Fund (Series ID: S000006644)

---

|  |  |  |
|:---|:---|:---|
| Class Name          | Ticker Symbol | Class ID   |
| Institutional Class | LSHIX         | C000018131 |

---

### Loomis Sayles Intermediate Duration Bond Fund (Series ID: S000006645)

---

|  |  |  |
|:---|:---|:---|
| Class Name | Ticker Symbol | Class ID   |
| Class Y    | LSDIX         | C000018132 |
| Class A    | LSDRX         | C000089753 |
| Class C    | LSCDX         | C000173092 |
| Class T    | LSDTX         | C000188531 |
| Class N    | LSDNX         | C000211126 |

---

### Loomis Sayles Investment Grade Fixed Income Fund (Series ID: S000006646)

---

|  |  |  |
|:---|:---|:---|
| Class Name          | Ticker Symbol | Class ID   |
| Institutional Class | LSIGX         | C000018133 |

---

### Loomis Sayles Small Cap Value Fund (Series ID: S000006647)

---

|  |  |  |
|:---|:---|:---|
| Class Name          | Ticker Symbol | Class ID   |
| Institutional Class | LSSCX         | C000018134 |
| Retail Class        | LSCRX         | C000018135 |
| Admin Class         | LSVAX         | C000018136 |
| Class N             | LSCNX         | C000125495 |

---

## Series and Classes Contracts Data

### Loomis Sayles Bond 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 Securitized Asset Fund (Series ID: S000006639)

| Class ID   | Class Name          | Ticker Symbol   |
|:---|:---|:---|
| C000018125 | Institutional Class | LSSAX           |

### Loomis Sayles Fixed Income Fund (Series ID: S000006640)

| Class ID   | Class Name          | Ticker Symbol   |
|:---|:---|:---|
| C000018126 | Institutional Class | LSFIX           |

### 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           |

### Loomis Sayles High Income Opportunities Fund (Series ID: S000006642)

| Class ID   | Class Name          | Ticker Symbol   |
|:---|:---|:---|
| C000018129 | Institutional Class | LSIOX           |

### Loomis Sayles Inflation Protected Securities Fund (Series ID: S000006643)

| Class ID   | Class Name          | Ticker Symbol   |
|:---|:---|:---|
| C000018130 | Institutional Class | LSGSX           |
| C000089752 | Retail Class        | LIPRX           |
| C000182246 | Class N             | LIPNX           |

### Loomis Sayles Institutional High Income Fund (Series ID: S000006644)

| Class ID   | Class Name          | Ticker Symbol   |
|:---|:---|:---|
| C000018131 | Institutional Class | LSHIX           |

### Loomis Sayles Intermediate Duration Bond Fund (Series ID: S000006645)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000018132 | Class Y      | LSDIX           |
| C000089753 | Class A      | LSDRX           |
| C000173092 | Class C      | LSCDX           |
| C000188531 | Class T      | LSDTX           |
| C000211126 | Class N      | LSDNX           |

### Loomis Sayles Investment Grade Fixed Income Fund (Series ID: S000006646)

| Class ID   | Class Name          | Ticker Symbol   |
|:---|:---|:---|
| C000018133 | Institutional Class | LSIGX           |

### Loomis Sayles Small Cap Value Fund (Series ID: S000006647)

| Class ID   | Class Name          | Ticker Symbol   |
|:---|:---|:---|
| C000018134 | Institutional Class | LSSCX           |
| C000018135 | Retail Class        | LSCRX           |
| C000018136 | Admin Class         | LSVAX           |
| C000125495 | Class N             | LSCNX           |

**LOOMIS SAYLES FUNDS** 

**NATIXIS FUNDS** 

**NATIXIS ETFs** 

Supplement dated December 2, 2025 to the Loomis Sayles Funds Statements of Additional Information, dated February 1, 2025, Natixis Funds Statements of Additional Information, dated February 1, 2025, April 1, 2025, May 1, 2025, June 1, 2025, and the Natixis ETFs Statement of Additional Information, dated May 1, 2025, as may be revised or supplemented from time to time, for the following funds:

---

| | |
|:---|:---|
| **AEW Global Focused Real Estate Fund** | **Loomis Sayles Limited Term Government and Agency Fund** |
| **Gateway Fund** | **Loomis Sayles Securitized Asset Fund** |
| **Gateway Equity Call Premium Fund** | **Loomis Sayles Senior Floating Rate and Fixed Income Fund** |
| **Loomis Sayles Bond Fund** | **Loomis Sayles Small Cap Growth Fund** |
| **Loomis Sayles Core Plus Bond Fund** | **Loomis Sayles Small Cap Value Fund** |
| **Loomis Sayles Fixed Income Fund** | **Loomis Sayles Small/Mid Cap Growth Fund** |
| **Loomis Sayles Global Allocation Fund** | **Loomis Sayles Strategic Alpha Fund** |
| **Loomis Sayles Global Bond Fund** | **Loomis Sayles Strategic Income Fund** |
| **Loomis Sayles Global Growth Fund** | **Mirova Global Megatrends Fund** |
| **Loomis Sayles Growth Fund** | **Natixis Gateway Quality Income ETF** |
| **Loomis Sayles High Income Fund** | **Natixis Loomis Sayles Focused Growth ETF** |
| **Loomis Sayles High Income Opportunities Fund** | **Natixis Oakmark Fund** |
| **Loomis Sayles Inflation Protected Securities Fund** | **Natixis Oakmark International Fund** |
| **Loomis Sayles Institutional High Income Fund** | **Natixis U.S. Equity Opportunities Fund** |
| **Loomis Sayles Intermediate Duration Bond Fund** | **Natixis Vaughan Nelson Select ETF** |
| **Loomis Sayles International Growth Fund** | **Vaughan Nelson Mid Cap Fund** |
| **Loomis Sayles Investment Grade Bond Fund** | **Vaughan Nelson Select Fund** |
| **Loomis Sayles Investment Grade Fixed Income Fund** | **Vaughan Nelson Small Cap Fund** |

---

***Effective November 26, 2025, Natalie R. Wagner has resigned as Chief Compliance Officer, Assistant Secretary and Anti-Money Laundering Officer of the Trusts. Accordingly, all references to Natalie R. Wagner are removed from each SAI.***

***Effective November 26, 2025, Susan McWhan Tobin has been appointed as Chief Compliance Officer and Anti-Money Laundering Officer of the Trusts. Accordingly, the "Officers of the Trust(s)" table located in the sub-section "Trustees and Officers" within the section "Management of the Trust(s)" in each SAI is hereby amended to include the following:***

---

| | | | |
|:---|:---|:---|:---|
| **Name and**<br> **Year of Birth** | **Position(s) Held**<br> **with the Trust(s)** | **Term of Office<sup>1</sup>**<br> **and Length of Time**<br> **Served** | **Principal Occupation(s) During Past 5**<br> **Years<sup>2</sup>** |
| **OFFICERS OF THE TRUST** |  |  |  |
| **Susan McWhan Tobin**<br> (1963) | Secretary and Chief Legal Officer | Since 2022 | Executive Vice President, General Counsel and Secretary, Natixis Advisors, LLC and Natixis Distribution, LLC; formerly, Executive Vice President and Chief Compliance Officer of Natixis Investment Managers (March 2019 - May 2022) |

---

------

Chief Compliance Officer and Anti-Money Laundering Officer Since 2025

<sup>1</sup> Each officer of the Trust serves for an indefinite term in accordance with the Trust's current by-laws until the date his or her successor is elected and qualified, or until he or she sooner dies, retires, is removed or becomes disqualified.

<sup>2</sup> Each person listed above, except as noted, holds the same position(s) with the Fund Complex. Previous positions during the past five years with Natixis Distribution, LLC, Natixis Advisors, LLC or Loomis, Sayles & Company, L.P. are omitted, if not materially different from a Trustee's or officer's current position with such entity.