# EDGAR Filing Document

**Accession Number:** 0000826732
**File Stem:** 0001104659-23-027416
**Filing Date:** 2023-3
**Character Count:** 3583
**Document Hash:** 3a53ba46a39f30e94f8af1adf9dd0b75
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001104659-23-027416.hdr.sgml**: 20230301

**ACCESSION NUMBER**: 0001104659-23-027416

**CONFORMED SUBMISSION TYPE**: 497

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20230301

**DATE AS OF CHANGE**: 20230301

**EFFECTIVENESS DATE**: 20230301

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** CALAMOS INVESTMENT TRUST/IL
- **CENTRAL INDEX KEY:** 0000826732
- **IRS NUMBER:** 363316238
- **STATE OF INCORPORATION:** MA
- **FISCAL YEAR END:** 1031

**FILING VALUES:**
- **FORM TYPE:** 497
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 033-19228
- **FILM NUMBER:** 23694587

**BUSINESS ADDRESS:**
- **STREET 1:** 2020 CALAMOS COURT
- **STREET 2:** C/O CALAMOS ADVISORS LLC
- **CITY:** NAPERVILLE
- **STATE:** IL
- **ZIP:** 60563
- **BUSINESS PHONE:** 6302451046

**MAIL ADDRESS:**
- **STREET 1:** 2020 CALAMOS COURT
- **STREET 2:** C/O CALAMOS ADVISORS LLC
- **CITY:** NAPERVILLE
- **STATE:** IL
- **ZIP:** 60563

## Series and Classes Contracts Data

### Calamos Global Sustainable Equities Fund (Series ID: S000074710)

---

|  |  |
|:---|:---|
| Class Name | Class ID   |
| Class R6   | C000232828 |
| Class A    | C000232829 |
| Class C    | C000232830 |
| Class I    | C000232831 |

---

## Series and Classes Contracts Data

### Calamos Global Sustainable Equities Fund (Series ID: S000074710)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000232828 | Class R6     |  |
| C000232829 | Class A      |  |
| C000232830 | Class C      |  |
| C000232831 | Class I      |  |

**CALAMOS<sup>®</sup> FAMILY OF FUNDS**

**CALAMOS INVESTMENT TRUST**

**Calamos Global Sustainable Equities Fund (the "Fund")**

**Supplement dated March 1, 2023 to the Fund's**

**Summary Prospectus, Prospectus and Statement of Additional Information, each dated March 1, 2023, as supplemented**

As previously disclosed in the prospectus supplements dated November 2, 2022 and February 17, 2023, the Fund's Board of Trustees approved a proposal to liquidate the Fund at a meeting held on October 31, 2022.

It is expected that the Fund will liquidate on or about **March 27, 2023** (the "**Liquidation Date**"). All dates noted in this announcement are effective as of the close of business on the respective date.

Effective February 21, 2023, the Fund stopped accepting purchases from new investors and existing shareholders, except that existing investors that hold Fund shares through defined contribution retirement plans as of February 17, 2023, may continue to purchase Fund shares through March 20, 2023. At this time, no final distribution is anticipated. If a final distribution is subsequently required, it will be paid no later than Wednesday, March 22, 2023. The Fund reserves the right to modify the extent to which sales of shares are limited prior to the Fund's liquidation.

Any contingent deferred sales charge that would be applicable on a redemption of the Fund's shares shall be waived from February 21, 2023 to the Liquidation Date.

Calamos expects to begin to reduce the remaining assets of the Fund to distributable form in cash on or around March 20, 2023, to facilitate the Fund's liquidation. Beginning on that date, the Fund may no longer be invested in accordance with its principal investment strategies. The last date to place redemptions via the NSCC is Friday, March 24, 2023. **After the close of business on the Liquidation Date, the Fund will liquidate any remaining shareholder accounts and will send shareholders the proceeds of the liquidation.**

**PLEASE RETAIN SUPPLEMENT FOR FUTURE REFERENCE**