# EDGAR Filing Document

**Accession Number:** 0001579881
**File Stem:** 0001410368-26-034381
**Filing Date:** 2026-3
**Character Count:** 8135
**Document Hash:** cf4e46aa88b786be3f37afaf9466d72e
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001410368-26-034381.hdr.sgml**: 20260331

**ACCESSION NUMBER**: 0001410368-26-034381

**CONFORMED SUBMISSION TYPE**: NPORT-P

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20260131

**FILED AS OF DATE**: 20260331

**DATE AS OF CHANGE**: 20260331

**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:** 26820694

**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:** 2026-01-31

**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:** $95684416.33

**Total Liabilities:** $15743.74

**Net Assets:** $95668672.59

**Cash Not Reported:** $98799.60

**Monthly Return Information**

| Class               | Month 1 Return (%)   | Month 2 Return (%)   | Month 3 Return (%)   |
|:---|:---|:---|:---|
| Class ID C000254075 | 0.33%                | 0.52%                | 0.44%                |

**Monthly Gains & Losses**

| Period   | Net Realized Gain/Loss   | Net Unrealized Appreciation/Depreciation   |
|:---|:---|:---|
| Month 1  | $0.00                    | $315193.95                                 |
| Month 2  | $53158.12                | $420252.78                                 |
| Month 3  | $0.00                    | $426627.86                                 |

### 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 - May       | Calamos S&P 500 Structured Alt Protection ETF - May       | CUSIP: 12811T605<br>LEI: 529900YBJJAKW7UWTP52 | Long             | EC               | RF                | US        |    276819 | NS      | $7955778.06   | 8.32%             |  |  |  | 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        |    294339 | NS      | $7966962.01   | 8.33%             |  |  |  | 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        |    293084 | NS      | $7966023.12   | 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        |    304426 | NS      | $7967437.27   | 8.33%             |  |  |  | No            |                  1 | On Loan: No      |
| 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        |    315042 | NS      | $7979982.36   | 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        |    310345 | NS      | $7988280.30   | 8.35%             |  |  |  | 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        |    316053 | NS      | $7958277.75   | 8.32%             |  |  |  | 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        |    304544 | NS      | $7957734.72   | 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        |    294888 | NS      | $7969348.20   | 8.33%             |  |  |  | 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        |    294397 | NS      | $7954194.78   | 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        |    292922 | NS      | $7966013.79   | 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        |    293032 | NS      | $7955584.37   | 8.32%             |  |  |  | No            |                  1 | On Loan: No      |

### Signature

**Date Signed:** 2026-02-20

**Name of Applicant:** Calamos ETF Trust

**Signature:** Stephen Atkins

**Name of Signer:** Stephen Atkins

**Title:** Treasurer