# EDGAR Filing Document

**Accession Number:** 0000816153
**File Stem:** 0001999371-25-009886
**Filing Date:** 2025-7
**Character Count:** 5480
**Document Hash:** 1a92ddf99f0658ad3d8a2661048d91c5
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001999371-25-009886.hdr.sgml**: 20250725

**ACCESSION NUMBER**: 0001999371-25-009886

**CONFORMED SUBMISSION TYPE**: 497

**PUBLIC DOCUMENT COUNT**: 16

**FILED AS OF DATE**: 20250725

**DATE AS OF CHANGE**: 20250725

**EFFECTIVENESS DATE**: 20250725

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** THORNBURG INVESTMENT TRUST
- **CENTRAL INDEX KEY:** 0000816153

**ORGANIZATION NAME:**
- **EIN:** 061158764
- **STATE OF INCORPORATION:** MA
- **FISCAL YEAR END:** 0930

**FILING VALUES:**
- **FORM TYPE:** 497
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 033-14905
- **FILM NUMBER:** 251152095

**BUSINESS ADDRESS:**
- **STREET 1:** 2300 NORTH RIDGETOP ROAD
- **CITY:** SANTA FE
- **STATE:** NM
- **ZIP:** 87506-8361
- **BUSINESS PHONE:** 5059840200

**MAIL ADDRESS:**
- **STREET 1:** 2300 NORTH RIDGETOP ROAD
- **CITY:** SANTA FE
- **STATE:** NM
- **ZIP:** 87506-8361

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** THORNBURG INCOME TRUST
- **DATE OF NAME CHANGE:** 19920703

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** LIMITED TERM TRUST
- **DATE OF NAME CHANGE:** 19870816

## Series and Classes Contracts Data

### Thornburg Emerging Markets Managed Account Fund (Series ID: S000079975)

---

|  |  |  |
|:---|:---|:---|
| Class Name | Ticker Symbol | Class ID   |
| Class SMA  | THMGX         | C000241472 |

---

## Series and Classes Contracts Data

### Thornburg Emerging Markets Managed Account Fund (Series ID: S000079975)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000241472 | Class SMA    | THMGX           |

?xml version='1.0' encoding='ASCII'? tbit-497_072525

**1**

![](tbit-497_072525img001.gif)

**THORNBURG INVESTMENT TRUST SUPPLEMENT**

Dated July 25, 2025

to the

**THORNBURG MANAGED ACCOUNT FUNDS PROSPECTUS** 

applicable to Class SMA shares of the Thornburg Emerging Markets Managed Account Fund and

the Thornburg Municipal Managed Account Fund, and

dated February 1, 2025, as supplemented March 13, April 1, and April 23, 2025

**(the "Prospectus")**

**Thornburg Emerging Markets Managed Account Fund Investment Limitation Change**

*Effective July 23, 2025, the Thornburg Emerging Markets Managed Account Fund (the "Fund") adopted a fundamental investment policy which prohibits the Fund from concentrating its investments in an industry or groups of industries. Accordingly, effective immediately the disclosure on page 2 of the Prospectus in the second paragraph of the "Principal Investment Strategies" section is revised to delete the language stating that the Fund may concentrate in particular industries and replaced with the following revised paragraph:*

The Fund may invest in issuers of any size of capitalization, including small companies, and expects that under normal conditions its assets will be invested in issuers domiciled in or tied economically to a variety of different emerging market countries. The Fund is non-diversified.

*In addition, the "Concentration Risk" paragraphs in the "Principal Investment Risks" section and "Additional Information - Investing in Stocks and Other Equity Securities" section on pages 3 and 14 of the Prospectus, respectively, are deleted in their entireties.* 

PLEASE KEEP THIS SUPPLEMENT FOR FUTURE REFERENCE

TH6633

**1**

**THORNBURG INVESTMENT TRUST SUPPLEMENT**

Dated July 25, 2025

to the

**THORNBURG MANAGED ACCOUNT FUNDS STATEMENT OF ADDITIONAL INFORMATION** 

applicable to Class SMA shares of the Thornburg Emerging Markets Managed Account Fund and

the Thornburg Municipal Managed Account Fund, and

dated February 1, 2025, as supplemented March 13, April 1, and April 23, 2025

**(the "SAI")**

**Thornburg Emerging Markets Managed Account Fund Investment Limitation Change**

*Effective July 23, 2025, the Thornburg Emerging Markets Managed Account Fund (the "Fund") adopted a fundamental investment policy which prohibits the Fund from concentrating its investments in an industry or groups of industries. Accordingly, effective immediately, the "Concentration" subsection on page 25 of the SAI is hereby deleted in its entirety. In addition, the "Investment Limitations" section with respect to the Fund beginning on page 28 of the SAI is revised to add the following disclosure after romannette (6), to state that the Fund may not:*

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(7) purchase any security if, as a result of such purchase 25% or more of the Fund's total assets (taken at current value) would be invested in securities of issuers in a single industry or group of industries.

*The following disclosure is also added after the last paragraph on page 28 of the SAI:* 

In determining whether an issuer should be classified in a particular industry for purposes of applying the fundamental investment limitation on industry concentration described above, the Advisor may rely on its own analysis of the issuer or on available third-party industry classifications. When using third-party industry classifications for this purpose, the Advisor currently looks to classifications provided by Bloomberg. Securities of the U.S. Government and its agencies and instrumentalities are not considered to represent industries for purposes of the Fund's industry concentration policy.

PLEASE KEEP THIS SUPPLEMENT FOR FUTURE REFERENCE

TH6634

![](tbit-497_072525img001.gif)