# EDGAR Filing Document

**Accession Number:** 0001757563
**File Stem:** 0001193125-26-267303
**Filing Date:** 2026-6
**Character Count:** 4500
**Document Hash:** d629c67d00dfe42e4b0c4b1ef0e55f12
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-267303.hdr.sgml**: 20260611

**ACCESSION NUMBER**: 0001193125-26-267303

**CONFORMED SUBMISSION TYPE**: 497

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20260611

**DATE AS OF CHANGE**: 20260611

**EFFECTIVENESS DATE**: 20260611

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Loomis Sayles Credit Income Opportunities Fund
- **CENTRAL INDEX KEY:** 0001757563

**ORGANIZATION NAME:**
- **EIN:** 000000000
- **STATE OF INCORPORATION:** MA
- **FISCAL YEAR END:** 0930

**FILING VALUES:**
- **FORM TYPE:** 497
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-288967
- **FILM NUMBER:** 261082681

**BUSINESS ADDRESS:**
- **STREET 1:** 888 BOYLSTON STREET
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02199
- **BUSINESS PHONE:** 617-449-2846

**MAIL ADDRESS:**
- **STREET 1:** 888 BOYLSTON STREET
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02199

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Loomis Sayles Alternative Asset Based Solutions Income Fund
- **DATE OF NAME CHANGE:** 20181030

NO SERIES-AND-CLASSES-CONTRACTS-DATA BLOCK FOUND

*Supplement dated June 11, 2026 to the Fund's Prospectus and Statement of Additional Information* 

*("SAI"), each dated May 7, 2026, as may be revised or supplemented from time to time.* 

**LOOMIS SAYLES CREDIT INCOME OPPORTUNITIES FUND** 

**(the "Fund")** 

***Effective June 30, 2026, Christopher J. Romanelli will join the portfolio management team of the Loomis Sayles Credit Income Opportunities Fund.***

Matthew J. Eagan, Peter S. Sheehan, and Eric Williams will remain as portfolio managers of the Loomis Sayles Credit Income Opportunities Fund.

***Accordingly, effective June 30, 2026, the subsection "Portfolio Managers" under the section "Management of the Fund" in the Prospectus is revised to include the following:***

**Christopher J. Romanelli**, **CFA<sup>®</sup>** has served as a portfolio manager of the Fund since 2026. Mr. Romanelli, Portfolio Manager of Loomis Sayles, began his investment career in 2005 and joined Loomis Sayles in 2010. He received a B.S. from Gordon College, and an M.S. from Boston University. Mr. Romanelli has over 21 years of investment experience.

***Effective June 30, 2026, the sub-sections "Portfolio Managers' Management of Other Accounts" and "Portfolio Managers' Ownership of Fund Shares" within the section "Portfolio Management Information" of the SAI is revised to include the following:***

**Portfolio Managers' Management of Other Accounts** 

The following table provides information on the other accounts managed by the portfolio managers as of April 30, 2026:

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| | | | | | | | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|:---|:---|:---|:---|:---|:---|
| | **Registered Investment**<br>**Companies** | **Registered Investment**<br>**Companies** | **Registered Investment**<br>**Companies** | **Registered Investment**<br>**Companies** | **Other Pooled Investment**<br>**Vehicles** | **Other Pooled Investment**<br>**Vehicles** | **Other Pooled Investment**<br>**Vehicles** | **Other Pooled Investment**<br>**Vehicles** | **Other Accounts** | **Other Accounts** | **Other Accounts** | **Other Accounts** |
| | **Other Accounts<br>Managed** | **Other Accounts<br>Managed** | **Advisory Fee<br>is Based on<br>Performance** | **Advisory Fee<br>is Based on<br>Performance** | **Other**<br>**Accounts**<br>**Managed** | **Other**<br>**Accounts**<br>**Managed** | **Advisory fee is<br>Based on<br>Performance** | **Advisory fee is<br>Based on<br>Performance** | **Other Accounts<br>Managed** | **Other Accounts<br>Managed** | **Advisory Fee**<br>**is Based on**<br>**Performance** | **Advisory Fee**<br>**is Based on**<br>**Performance** |
| **Name of<br>Portfolio<br>Manager** | **# of<br>Accts** | **Total**<br>**Assets** | **# of<br>Accts** | **Total<br>Assets** | **# of<br>Accts** | **Total**<br>**Assets** | **# of<br>Accts** | **Total<br>Assets** | **# of<br>Accts** | **Total**<br>**Assets** | **# of<br>Accts** | **Total**<br>**Assets** |
|  Matthew J. Eagan | 21 | $39.5 billion | 0 | $0 | 35 | $14.0 billion | 0 | $0 | 97 | $32.2 billion | 3 | $354.2 million |
|  Christopher Romanelli | 1 | $81.6 million | 0 | $0 | 1 | $72.5 million | 0 | $0 | 2 | $857.0 million | 0 | $0 |
|  Peter S. Sheehan | 6 | $1.2 billion | 0 | $0 | 19 | $1.4 billion | 0 | $0 | 34 | $6.0 billion | 3 | $354.2 million |
|  Eric Williams | 5 | $1.2 billion | 0 | $0 | 19 | $1.4 billion | 0 | $0 | 28 | $5.7 billion | 3 | $354.2 million |

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