# EDGAR Filing Document

**Accession Number:** 0001579881
**File Stem:** 0001104659-25-106813
**Filing Date:** 2025-11
**Character Count:** 6192
**Document Hash:** 82757885efeb4e94b555d4200611519a
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001104659-25-106813.hdr.sgml**: 20251105

**ACCESSION NUMBER**: 0001104659-25-106813

**CONFORMED SUBMISSION TYPE**: 8-A12B

**PUBLIC DOCUMENT COUNT**: 2

**FILED AS OF DATE**: 20251105

**DATE AS OF CHANGE**: 20251105

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Calamos ETF Trust
- **CENTRAL INDEX KEY:** 0001579881

**ORGANIZATION NAME:**
- **EIN:** 000000000
- **STATE OF INCORPORATION:** DE

**FILING VALUES:**
- **FORM TYPE:** 8-A12B
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-36527
- **FILM NUMBER:** 251452573

**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

![](tm2523932d4_coverimg01.jpg)

November 5, 2025

Securities and Exchange Commission<br> 100 F Street, N.E.<br> Washington, D.C. 20549

Re: Calamos ETF Trust <br> <u>Registration Statement on Form 8-A</u>

Ladies and Gentlemen:

On behalf of the Calamos Nasdaq® Autocallable Income ETF (the *"Fund"*), a series of the Calamos ETF Trust (the *"Trust"*), we enclose herewith for filing pursuant to Section 12(b) of the Securities Exchange Act of 1934, as amended, a Registration Statement of the Trust on Form 8-A covering the Fund's common shares of beneficial interest (the *"Shares"*).

On November 4, 2025, on behalf of the Fund, the Trust filed with the Securities and Exchange Commission a Registration Statement on Form N-1A (Registration Nos. 333-191151 and 811-22887) to register the Shares under the Securities Act of 1933, as amended.

The Shares are being listed on Nasdaq Global Select Market and, accordingly, a copy of the Fund's prospectus which contains a description of the Shares has been transmitted for filing with Nasdaq Global Select Market.

If you have any questions concerning this filing or require any additional information, please contact me at (630) 245-8394.

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| | |
|:---|:---|
| Very truly yours, | Very truly yours, |
| Calamos Advisors LLC | Calamos Advisors LLC |
| By | /s/ J. Christopher Jackson |
|  | J Christopher Jackson<br> Senior Vice President – Of Counsel |

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Enclosure

**Securities and Exchange Commission<br> Washington, D.C.<br>Form 8-A**

For Registration of Certain Classes of Securities<br> Pursuant to Section 12(b) or (g) of the<br> Securities Exchange Act of 1934

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| | |
|:---|:---|
| Calamos ETF Trust | Calamos ETF Trust |
| &nbsp;&nbsp;(Exact name of registrant as specified in its charter) | &nbsp;&nbsp;(Exact name of registrant as specified in its charter) |
| &nbsp;&nbsp;Delaware | &nbsp;&nbsp;39-4204450 |
| &nbsp;&nbsp;(State of Incorporation or Organization) | &nbsp;&nbsp;(I.R.S. Employer Identification No.) |
| &nbsp;&nbsp;2020 Calamos Court<br> Naperville, Illinois | &nbsp;&nbsp;<br> 60563 |
| &nbsp;&nbsp;(Address of Principal Executive Offices) | &nbsp;&nbsp;(Zip Code) |

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Securities to be registered pursuant to Section 12(b) of the Act:

Title of each class<br> to be so registered Name of each exchange on which<br> each class is to be registered <br>Common Shares of Beneficial Interest,<br> of<br> Calamos Nasdaq® Autocallable Income ETF Nasdaq Global Select Market

If this form relates to the registration of a class of securities pursuant to Section 12(b) of the Exchange Act and is effective pursuant to General Instruction A. (c), check the following box.--⌧

If this form relates to the registration of a class of securities pursuant to Section 12(g) of the Exchange Act and is effective pursuant to General Instruction A. (d), check the following box.--◻

Securities Act registration statement file number to which this form relates: 333-191151

Securities to be registered pursuant to Section 12(g) of the Act: None

**Information Required in Registration Statement**

Item 1. Description of Registrant's Securities to be Registered

The securities to be registered hereunder are common shares of beneficial interest (the *"Shares"*), of the Calamos Nasdaq® Autocallable Income ETF (the *"Fund"*), a series of the Calamos ETF Trust (the *"Registrant"*). A description of the Shares is contained in the Fund's prospectus, which is a part of [Post-Effective Amendment No. 71 to the Registration Statement on Form N-1A](https://www.sec.gov/ix?doc=/Archives/edgar/data/1579881/000110465925106521/tm2523932d5_485bpos.htm) (Registration Nos. 333-191151 and 811-22887), filed with the Securities and Exchange Commission on November 4, 2025. Such description is incorporated by reference here. Any form of amendment or supplement to the prospectus that is subsequently filed with the SEC is hereby also incorporated by reference herein.

Item 2. Exhibits

(1) [Amended and Restated Certificate of Trust of the Registrant dated January 13, 2023, incorporated by reference to Exhibit (a)(ii) to Post-Effective Amendment No.10 to Registrant's Registration Statement on Form N-1A filed on January 23, 2023.](https://www.sec.gov/Archives/edgar/data/1579881/000110465923005496/tm2229294d3_ex99-aii.htm)

(2) [Second Amended and Restated Trust Instrument of the Registrant dated January 10, 2023, incorporated by reference to Exhibit (a)(iii) to Post-Effective Amendment No.10 to Registrant's Registration Statement on Form N-1A filed on January 23, 2023.](https://www.sec.gov/Archives/edgar/data/1579881/000110465923005496/tm2229294d3_ex99-aiii.htm)

(3) [By-laws of the Registrant dated December 16, 2022, incorporated by reference to Exhibit (b) to Post-Effective Amendment No.10 to Registrant's Registration Statement on Form N-1A filed on January 23, 2023](https://www.sec.gov/Archives/edgar/data/1579881/000110465923005496/tm2229294d3_ex99-b.htm) .

**Signature**

Pursuant to the requirements of Section 12 of the Securities Exchange Act of 1934, as amended, the Registrant has duly caused this registration statement to be signed on its behalf by the undersigned, thereto duly authorized.

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

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November 5, 2025