# EDGAR Filing Document

**Accession Number:** 0001079575
**File Stem:** 0001104659-26-076639
**Filing Date:** 2026-6
**Character Count:** 3647
**Document Hash:** 5bfab52911bfdc214441d4b875d708c7
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001104659-26-076639.hdr.sgml**: 20260623

**ACCESSION NUMBER**: 0001104659-26-076639

**CONFORMED SUBMISSION TYPE**: 497

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20260623

**DATE AS OF CHANGE**: 20260623

**EFFECTIVENESS DATE**: 20260623

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** CALAMOS ADVISORS TRUST/IL
- **CENTRAL INDEX KEY:** 0001079575

**ORGANIZATION NAME:**
- **EIN:** 367271106
- **STATE OF INCORPORATION:** MA
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 497
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-72511
- **FILM NUMBER:** 261108924

**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

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** CALAMOS INSURANCE TRUST
- **DATE OF NAME CHANGE:** 19990212

## Series and Classes Contracts Data

### Calamos U.S. Equity Autocallable VIP Fund (Series ID: S000105839)

---

|  |  |
|:---|:---|
| Class Name | Class ID   |
| Class I    | C000276633 |
| Class II   | C000276634 |

---

## Series and Classes Contracts Data

### Calamos U.S. Equity Autocallable VIP Fund (Series ID: S000105839)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000276633 | Class I      |  |
| C000276634 | Class II     |  |

---

| |
|:---|
| **Rule 497(e)** |
| **File No. 333-72511** |

---

**CALAMOS ADVISORS TRUST**

(the "Trust")

**Calamos U.S. Equity Autocallable VIP Fund** 

(the "Fund")

Supplement dated June 23, 2026

to the Fund's Prospectus dated June 23, 2026

*This supplement updates certain information contained in the Fund's Prospectus and should be attached to the Prospectus and retained for future reference. Capitalized terms not defined herein have the same meaning as in the Fund's Prospectus.*

This Supplement to the Prospectus (this "Supplement") supplements the Prospectus of the **Calamos U.S. Equity Autocallable VIP Fund** (the "Fund"), a series of the **Calamos Advisors Trust** (the "Trust"), dated June 23, 2026.

Although the Fund's registration statement has become effective under the Securities Act of 1933, as amended, **shares of the Fund are not yet available for purchase**. The Fund is not currently available as an investment option under any variable annuity or variable life insurance contract. The Fund expects to become available through participating insurance company separate accounts at a future date to be announced.

Investors will be notified of the availability of the Fund's shares through a subsequent supplement to this Prospectus or through other means of notice as required by applicable law. Until such notice is provided, no offers, purchases, or redemptions of shares of the Fund will be accepted.

The Fund is intended to serve as an investment option for variable annuity and variable life insurance contracts issued by insurance companies. Shares of the Fund will be available only to insurance company separate accounts that have entered into participation agreements with the Trust. The availability of the Fund as an investment option under a particular variable contract will depend on the terms and conditions of the relevant participation agreement and the applicable variable contract.

*This Supplement is not an offer to sell or a solicitation of an offer to buy shares of the Fund.*

**Please retain this supplement for future reference.**