# EDGAR Filing Document

**Accession Number:** 0001579881
**File Stem:** 0001410368-26-067707
**Filing Date:** 2026-6
**Character Count:** 8138
**Document Hash:** 504bbea9f02ee80067d7e40165d90ce7
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001410368-26-067707.hdr.sgml**: 20260626

**ACCESSION NUMBER**: 0001410368-26-067707

**CONFORMED SUBMISSION TYPE**: NPORT-P

**PUBLIC DOCUMENT COUNT**: 2

**CONFORMED PERIOD OF REPORT**: 20260430

**FILED AS OF DATE**: 20260626

**DATE AS OF CHANGE**: 20260626

**PERIOD START**: 20260731

**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:** NPORT-P
- **SEC ACT:** 1940 Act
- **SEC FILE NUMBER:** 811-22887
- **FILM NUMBER:** 261128635

**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 Laddered S&P 500 Structured Alt Protection ETF (Series ID: S000088047)

| Class ID   | Class Name                                             | Ticker Symbol   |
|:---|:---|:---|
| C000254075 | Calamos Laddered S&P 500 Structured Alt Protection ETF |  |

## Form NPORT-P: Monthly Portfolio Investments Report

### NPORT-P: Part A: General Information

**Item A.1. Information about the Registrant.**

- **a. Name of Registrant:** Calamos ETF Trust

- **b. Investment Company Act file number:** 811-22887

- **c. CIK number of Registrant:** 0001579881

- **d. LEI of Registrant:** 549300B2KP9WEFDULJ54

- **e. Address and telephone number of Registrant.**

  - **Street Address 1:** 2020 CALAMOS COURT

  - **City:** NAPERVILLE

  - **State:** IL

  - **Foreign country:** US

  - **Zip / Postal Code:** 60563

  - **Telephone number:** 630-245-7200

**Item A.2. Information about the Series.**

- **a. Name of Series:** Calamos Laddered S&P 500 Structured Alt Protection ETF

- **b. EDGAR series identifier (if any):** S000088047

- **c. LEI of Series:** 5299009VWTW8TBHTY679

**Item A.3. Reporting period.**

- **a. Date of fiscal year-end:** 2026-07-31

- **b. Date as of which information is reported:** 2026-04-30

**Item A.4. Final filing**

Does the Fund anticipate that this will be its final filing on Form N-PORT? **No**

### Fund Information

**Total Assets:** $108740224.15

**Total Liabilities:** $17985.71

**Net Assets:** $108722238.44

**Cash Not Reported:** $86810.81

**Monthly Return Information**

| Class               | Month 1 Return (%)   | Month 2 Return (%)   | Month 3 Return (%)   |
|:---|:---|:---|:---|
| Class ID C000254075 | 0.22%                | -0.58%               | 1.73%                |

**Monthly Gains & Losses**

| Period   | Net Realized Gain/Loss   | Net Unrealized Appreciation/Depreciation   |
|:---|:---|:---|
| Month 1  | $0.00                    | $234575.49                                 |
| Month 2  | $0.00                    | $-621770.59                                |
| Month 3  | $55535.48                | $1817574.79                                |

### Schedule of Portfolio Investments

| Name                                                      | Title                                                     | Identifiers                                   | Payoff Profile   | Asset Category   | Issuer Category   | Country   |   Balance | Units   | Value (USD)   | % of Net Assets   | Maturity Date   | Coupon Type   | Annualized Rate (%)   | Restricted?   |   Fair Value Level | Lending Status   |
|:---|:---|:---|:---|:---|:---|:---|---:|:---|:---|:---|:---|:---|:---|:---|---:|:---|
| Calamos S&P 500 Structured Alt Protection ETF - March     | Calamos S&P 500 Structured Alt Protection ETF - March     | CUSIP: 12811T761<br>LEI: 529900OZMUJEE6DBWY51 | Long             | EC               | RF                | US        |    353292 | NS      | $9065472.72   | 8.34%             |  |  |  | No            |                  1 | On Loan: No      |
| Calamos S&P 500 Structured Alt Protection ETF - December  | Calamos S&P 500 Structured Alt Protection ETF - December  | CUSIP: 12811T795<br>LEI: 529900KI0MEC4KFU2U85 | Long             | EC               | RF                | US        |    341519 | NS      | $9031469.96   | 8.31%             |  |  |  | No            |                  1 | On Loan: No      |
| Calamos S&P 500 Structured Alt Protection ETF - June      | Calamos S&P 500 Structured Alt Protection ETF - June      | CUSIP: 12811T746<br>LEI: 52990001WXERZSHBCQ81 | Long             | EC               | RF                | US        |    328665 | NS      | $9058007.40   | 8.33%             |  |  |  | No            |                  1 | On Loan: No      |
| Calamos S&P 500 Structured Alt Protection ETF - September | Calamos S&P 500 Structured Alt Protection ETF - September | CUSIP: 12811T886<br>LEI: 529900J3C3QVJWPBSI56 | Long             | EC               | RF                | US        |    328613 | NS      | $9041786.70   | 8.32%             |  |  |  | No            |                  1 | On Loan: No      |
| Calamos S&P 500 Structured Alt Protection ETF - July      | Calamos S&P 500 Structured Alt Protection ETF - July      | CUSIP: 12811T803<br>LEI: 529900BVEAMOTWU8BN92 | Long             | EC               | RF                | US        |    330690 | NS      | $9060906.00   | 8.33%             |  |  |  | No            |                  1 | On Loan: No      |
| Calamos S&P 500 Structured Alt Protection ETF - January   | Calamos S&P 500 Structured Alt Protection ETF - January   | CUSIP: 12811T787<br>LEI: 529900W960V0AT12PD43 | Long             | EC               | RF                | US        |    354439 | NS      | $9029333.53   | 8.30%             |  |  |  | No            |                  1 | On Loan: No      |
| Calamos S&P 500 Structured Alt Protection ETF - May       | Calamos S&P 500 Structured Alt Protection ETF - May       | CUSIP: 12811T605<br>LEI: 529900YBJJAKW7UWTP52 | Long             | EC               | RF                | US        |    310428 | NS      | $9023272.76   | 8.30%             |  |  |  | No            |                  1 | On Loan: No      |
| Calamos S&P 500 Structured Alt Protection ETF - August    | Calamos S&P 500 Structured Alt Protection ETF - August    | CUSIP: 12811T704<br>LEI: 529900VODKS9PLA9OK22 | Long             | EC               | RF                | US        |    330073 | NS      | $9060503.85   | 8.33%             |  |  |  | No            |                  1 | On Loan: No      |
| Calamos S&P 500 Structured Alt Protection ETF - April     | Calamos S&P 500 Structured Alt Protection ETF - April     | CUSIP: 12811T753<br>LEI: 5299002XITPXWH6BFE28 | Long             | EC               | RF                | US        |    341384 | NS      | $9130315.08   | 8.40%             |  |  |  | No            |                  1 | On Loan: No      |
| Calamos S&P 500 Structured Alt Protection ETF - November  | Calamos S&P 500 Structured Alt Protection ETF - November  | CUSIP: 12811T811<br>LEI: 5299008A16L93LF9JY07 | Long             | EC               | RF                | US        |    330148 | NS      | $9039452.24   | 8.31%             |  |  |  | No            |                  1 | On Loan: No      |
| Calamos S&P 500 Structured Alt Protection ETF - October   | Calamos S&P 500 Structured Alt Protection ETF - October   | CUSIP: 12811T829<br>LEI: 529900FD0RPBHLDV4K79 | Long             | EC               | RF                | US        |    328486 | NS      | $9054716.59   | 8.33%             |  |  |  | No            |                  1 | On Loan: No      |
| Calamos S&P 500 Structured Alt Protection ETF - February  | Calamos S&P 500 Structured Alt Protection ETF - February  | CUSIP: 12811T779<br>LEI: 5299002IP7IYWS7M4B83 | Long             | EC               | RF                | US        |    348034 | NS      | $9058176.51   | 8.33%             |  |  |  | No            |                  1 | On Loan: No      |

### Signature

**Date Signed:** 2026-06-11

**Name of Applicant:** Calamos ETF Trust

**Signature:** Stephen Atkins

**Name of Signer:** Stephen Atkins

**Title:** Treasurer