# EDGAR Filing Document

**Accession Number:** 0001579881
**File Stem:** 0001104659-23-005098
**Filing Date:** 2023-1
**Character Count:** 6215
**Document Hash:** 56d3796b3ee2b36519f4b2b610691f4b
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001104659-23-005098.hdr.sgml**: 20230120

**ACCESSION NUMBER**: 0001104659-23-005098

**CONFORMED SUBMISSION TYPE**: 485BXT

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20230120

**DATE AS OF CHANGE**: 20230119

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Calamos ETF Trust
- **CENTRAL INDEX KEY:** 0001579881
- **IRS NUMBER:** 000000000
- **STATE OF INCORPORATION:** DE

**FILING VALUES:**
- **FORM TYPE:** 485BXT
- **SEC ACT:** 1940 Act
- **SEC FILE NUMBER:** 811-22887
- **FILM NUMBER:** 23538414

**BUSINESS ADDRESS:**
- **STREET 1:** 2020 CALAMOS COURT
- **CITY:** NAPERVILLE
- **STATE:** IL
- **ZIP:** 60563
- **BUSINESS PHONE:** 630-245-8394

**MAIL ADDRESS:**
- **STREET 1:** 2020 CALAMOS COURT
- **CITY:** NAPERVILLE
- **STATE:** IL
- **ZIP:** 60563
**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Calamos ETF Trust
- **CENTRAL INDEX KEY:** 0001579881
- **IRS NUMBER:** 000000000
- **STATE OF INCORPORATION:** DE

**FILING VALUES:**
- **FORM TYPE:** 485BXT
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-191151
- **FILM NUMBER:** 23538413

**BUSINESS ADDRESS:**
- **STREET 1:** 2020 CALAMOS COURT
- **CITY:** NAPERVILLE
- **STATE:** IL
- **ZIP:** 60563
- **BUSINESS PHONE:** 630-245-8394

**MAIL ADDRESS:**
- **STREET 1:** 2020 CALAMOS COURT
- **CITY:** NAPERVILLE
- **STATE:** IL
- **ZIP:** 60563

## Series and Classes Contracts Data

### Calamos Antetokounmpo Global Sustainable Equities ETF (Series ID: S000079464)

| Class ID   | Class Name                                            | Ticker Symbol   |
|:---|:---|:---|
| C000240501 | Calamos Antetokounmpo Global Sustainable Equities ETF |  |

As filed with the Securities and Exchange Commission on January 19, 2023.

1933 Act Registration No. 333-191151

1940 Act Registration No. 811-22887

United States

Securities and Exchange Commission

Washington, D.C. 20549

Form N-1A

Registration Statement Under the Securities Act of 1933 ¨ <br> Pre-Effective Amendment No. ◻ <br> Post-Effective Amendment No. 9 ⌧

and/or

Registration Statement Under the Investment Company Act of 1940 ◻ <br> Amendment No. 11 ⌧

Calamos ETF Trust

(Exact name of registrant as specified in charter)

2020 Calamos Court

Naperville, Illinois 60653

(Address of Principal Executive Offices) (Zip Code)

Registrant's Telephone Number, including Area Code: (630) 245-7200

J. Christopher Jackson

2020 Calamos Court

Naperville, Illinois 60563

(Name and Address of Agent for Service)

Copy to:

---

| | |
|:---|:---|
| Paulita A. Pike and Rita Rubin | Morrison C. Warren, Esq. |
| Ropes & Gray LLP | Chapman and Cutler LLP |
| 191 N. Wacker Drive, 32<sup>nd</sup> Floor | 320 South Canal Street |
| Chicago, Illinois 60606 | Chicago, Illinois 60606 |

---

It is proposed that this filing will become effective (check appropriate box):

◻ immediately upon filing pursuant to paragraph (b)

⌧ on January 23, 2023 pursuant to paragraph (b)

◻ 60 days after filing pursuant to paragraph (a)(1)

◻ on (date) pursuant to paragraph (a)(1)

◻ 75 days after filing pursuant to paragraph (a)(2)

◻ on (date) pursuant to paragraph (a)(2) of Rule 485

If appropriate, check the following box:

⌧ this post-effective amendment designates a new effective date for a previously filed post-effective amendment.

Contents of Post-Effective Amendment No. 9

This Post-Effective Amendment to the Registration Statement comprises the following papers and contents:

The Facing Sheet

The sole purpose of this filing is to delay the effectiveness of the Registrant's Post-Effective Amendment No. 6, as it relates to Calamos Antetokounmpo Global Sustainable Equities ETF (the "Fund"), a series of the Registrant, until January 23, 2023. [Parts A, B and C of the Registrant's Post-Effective Amendment No. 6 under the Securities Act of 1933 as it relates to the Fund, filed on November 4, 2022](https://www.sec.gov/Archives/edgar/data/1579881/000110465922114934/tm2229294d1_485apos.htm), are incorporated by reference herein.

Signatures

**Signatures**

Pursuant to the requirements of the Securities Act of 1933, as amended (the "Securities Act") and the Investment Company Act of 1940, as amended, the Registrant certifies that it meets all of the requirements for effectiveness of this Registration Statement under rule 485(b) under the Securities Act and has duly caused this Registration Statement to be signed on its behalf by the undersigned, duly authorized in the City of Naperville, and State of Illinois, on January 19, 2023.

---

| | |
|:---|:---|
| Calamos ETF Trust | Calamos ETF Trust |
| By: | /s/ John P. Calamos, Sr. |
|  | John P. Calamos, Sr. |
|  | President |

---

Pursuant to the requirements of the Securities Act, this Registration Statement has been signed below by the following persons in the capacities and on the date indicated:

---

| | | |
|:---|:---|:---|
| **Name** | **Title** | **Date** |
| /s/ John P. Calamos, Sr. | Trustee and President (principal executive officer) | January 19, 2023 |
| John P. Calamos, Sr. | Trustee and President (principal executive officer) |  |
| /s/ John E. Neal\* | Trustee | January 19, 2023 |
| John E. Neal |  |  |
| /s/ William Rybak\* | Trustee | January 19, 2023 |
| William Rybak |  |  |
| /s/ Virginia G. Breen\* | Trustee | January 19, 2023 |
| Virginia G. Breen |  |  |
| /s/ Lloyd A. Wennlund\* | Trustee | January 19, 2023 |
| Lloyd A. Wennlund |  |  |
| /s/ Karen L. Stuckey\* | Trustee | January 19, 2023 |
| Karen L. Stuckey |  |  |
| /s/ Christopher M. Toub\* | Trustee | January 19, 2023 |
| Christopher M. Toub |  |  |
| /s/ Thomas E. Herman | Vice President and Chief Financial Officer (principal accounting officer) | January 19, 2023 |
| Thomas E. Herman | Vice President and Chief Financial Officer (principal accounting officer) |  |

---

\* An original power of attorney authorizing John P. Calamos, Sr. to execute this Registration Statement, and amendments thereto, for each of the trustees of the Registrant on whose behalf this Registration Statement is filed, were previously executed, and [previously filed](https://www.sec.gov/Archives/edgar/data/1579881/000110465922114934/tm2229294d1_ex99-q.htm) as an exhibit.