# EDGAR Filing Document

**Accession Number:** 0001579881
**File Stem:** 0001410368-25-044092
**Filing Date:** 2025-12
**Character Count:** 8114
**Document Hash:** dc1f8a8e49f6b6112c405285bbc6d9be
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001410368-25-044092.hdr.sgml**: 20251230

**ACCESSION NUMBER**: 0001410368-25-044092

**CONFORMED SUBMISSION TYPE**: NPORT-P/A

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20250731

**FILED AS OF DATE**: 20251230

**DATE AS OF CHANGE**: 20251230

**PERIOD START**: 20250731

**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/A
- **SEC ACT:** 1940 Act
- **SEC FILE NUMBER:** 811-22887
- **FILM NUMBER:** 251613258

**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:** 2025-07-31

- **b. Date as of which information is reported:** 2025-07-31

**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:** $81399482.00

**Total Liabilities:** $13378.65

**Net Assets:** $81386103.35

**Cash Not Reported:** $26428.42

**Monthly Return Information**

| Class               | Month 1 Return (%)   | Month 2 Return (%)   | Month 3 Return (%)   |
|:---|:---|:---|:---|
| Class ID C000254075 | 1.45%                | 1.39%                | 0.65%                |

**Monthly Gains & Losses**

| Period   | Net Realized Gain/Loss   | Net Unrealized Appreciation/Depreciation   |
|:---|:---|:---|
| Month 1  | $0.00                    | $843233.33                                 |
| Month 2  | $-87.13                  | $1106728.28                                |
| Month 3  | $197728.56               | $316471.22                                 |

### 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        |    276766 | NS      | $6766098.40   | 8.31%             |  |  |  | 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        |    272580 | NS      | $6820605.79   | 8.38%             |  |  |  | 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        |    255463 | NS      | $6739165.03   | 8.28%             |  |  |  | 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        |    258426 | NS      | $6804356.58   | 8.36%             |  |  |  | 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        |    260131 | NS      | $6815536.25   | 8.37%             |  |  |  | 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        |    278798 | NS      | $6780144.32   | 8.33%             |  |  |  | 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        |    240754 | NS      | $6731337.39   | 8.27%             |  |  |  | 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        |    260399 | NS      | $6822844.40   | 8.38%             |  |  |  | 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        |    265229 | NS      | $6739468.89   | 8.28%             |  |  |  | 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        |    258512 | NS      | $6779632.31   | 8.33%             |  |  |  | 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        |    256972 | NS      | $6789174.54   | 8.34%             |  |  |  | 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        |    274161 | NS      | $6784689.68   | 8.34%             |  |  |  | No            |                  1 | On Loan: No      |

### Signature

**Date Signed:** 2025-10-30

**Name of Applicant:** Calamos ETF Trust

**Signature:** Stephen Atkins

**Name of Signer:** Stephen Atkins

**Title:** Treasurer