# EDGAR Filing Document

**Accession Number:** 0000826732
**File Stem:** 0001410368-26-067691
**Filing Date:** 2026-6
**Character Count:** 19581
**Document Hash:** 850aae074ca160692ca13e9fc9aa1cfc
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001410368-26-067691.hdr.sgml**: 20260626

**ACCESSION NUMBER**: 0001410368-26-067691

**CONFORMED SUBMISSION TYPE**: NPORT-P

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20260430

**FILED AS OF DATE**: 20260626

**DATE AS OF CHANGE**: 20260626

**PERIOD START**: 20261031

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** CALAMOS INVESTMENT TRUST/IL
- **CENTRAL INDEX KEY:** 0000826732

**ORGANIZATION NAME:**
- **EIN:** 363316238
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1031

**FILING VALUES:**
- **FORM TYPE:** NPORT-P
- **SEC ACT:** 1940 Act
- **SEC FILE NUMBER:** 811-05443
- **FILM NUMBER:** 261128618

**BUSINESS ADDRESS:**
- **STREET 1:** 2020 CALAMOS COURT
- **STREET 2:** C/O CALAMOS ADVISORS LLC
- **CITY:** NAPERVILLE
- **STATE:** IL
- **ZIP:** 60563
- **BUSINESS PHONE:** 6302451046

**MAIL ADDRESS:**
- **STREET 1:** 2020 CALAMOS COURT
- **STREET 2:** C/O CALAMOS ADVISORS LLC
- **CITY:** NAPERVILLE
- **STATE:** IL
- **ZIP:** 60563

## Series and Classes Contracts Data

### Calamos Merger Arbitrage Fund (Series ID: S000081268)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000243949 | Class I      |  |
| C000243950 | Class C      |  |
| C000243951 | Class A      |  |

## 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 INVESTMENT TRUST/IL

- **b. Investment Company Act file number:** 811-05443

- **c. CIK number of Registrant:** 0000826732

- **d. LEI of Registrant:** 3MM2UW658H6KOU4WEW86

- **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 Merger Arbitrage Fund

- **b. EDGAR series identifier (if any):** S000081268

- **c. LEI of Series:** 5493000KIMK2YSAPJF63

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

- **a. Date of fiscal year-end:** 2026-10-31

- **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:** $3550872.03

**Total Liabilities:** $1078108.97

**Net Assets:** $2472763.06

**Cash Not Reported:** $312805.80

**Currency Risk Metrics (dv01):**

- 

**Credit Spread Risk - Investment Grade (dv01):**

- **3-Month:** -0.08000000 | **1-Year:** -8.96000000 | **5-Year:** -42.86000000 | **10-Year:** 0.00000000 | **30-Year:** 0.00000000

**Credit Spread Risk - Non-Investment Grade (dv01):**

- **3-Month:** -1.46000000 | **1-Year:** -40.34000000 | **5-Year:** -61.49000000 | **10-Year:** -1.54000000 | **30-Year:** 0.00000000

**Monthly Return Information**

| Class               | Month 1 Return (%)   | Month 2 Return (%)   | Month 3 Return (%)   |
|:---|:---|:---|:---|
| Class ID C000243950 | 0.69%                | -1.37%               | 1.38%                |
| Class ID C000243951 | 0.69%                | -1.26%               | 1.48%                |
| Class ID C000243949 | 0.69%                | -1.26%               | 1.58%                |

**Monthly Gains & Losses**

| Period   | Net Realized Gain/Loss   | Net Unrealized Appreciation/Depreciation   |
|:---|:---|:---|
| Month 1  | $4407.75                 | $11303.49                                  |
| Month 2  | $1634.07                 | $-45677.12                                 |
| Month 3  | $-18865.56               | $57345.81                                  |

**Designated Index Information**

- **Index Name:** Securities Portfolio VaR

- **Index Identifier:** Designated Reference Portfolio is the Fund`s Securities Portfolio

### 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   |
|:---|:---|:---|:---|:---|:---|:---|---:|:---|:---|:---|:---|:---|:---|:---|---:|:---|
| Union Pacific Corp                     | Union Pacific Corp                     | CUSIP: 907818108<br>LEI: 549300LMMRSZZCZ8CL11 | Short            | EC               | CORP              | US        |      -648 | NS      | $-174623.04   | -7.06%            |  |  |  | No            |                  1 | On Loan: No      |
| STRATEGY INC                           | Strategy Inc                           | CUSIP: 594972AS0<br>LEI: 549300WQTWEJUEHXQX21 | Long             | DBT              | CORP              | US        |     65000 | PA      | $56194.45     | 2.27%             | 2029-12-01      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| Warner Bros Discovery Inc              | Warner Bros Discovery Inc              | CUSIP: 934423104<br>LEI: 5493006ZCRFWKF6B1K26 | Long             | EC               | CORP              | US        |      4616 | NS      | $124862.80    | 5.05%             |  |  |  | No            |                  1 | On Loan: No      |
| Quetta Acquisition Corp                | Quetta Acquisition Corp                | CUSIP: 74841A113<br>LEI: N/A                  | N/A              | DE               |  | US        |        23 | NS      | $27.37        | 0.00%             |  |  |  | No            |                  1 | On Loan: No      |
| CONTRA MIRATI THERAPEU                 | CONTRA MIRATI THERAPEU                 | CUSIP: 604CVR027<br>LEI: 529900GYRW59IDQV6N54 | N/A              | DE               |  | US        |       755 | NS      | $755.00       | 0.03%             |  |  |  | No            |                  3 | On Loan: No      |
| ALKAMI TECHNOLOGY INC                  | Alkami Technology Inc                  | CUSIP: 01644JAB4<br>LEI: 254900FCNYU4HNEV9L47 | Long             | DBT              | CORP              | US        |     78000 | PA      | $71770.14     | 2.90%             | 2030-03-15      | Fixed         | 1.50%                 | No            |                  2 | On Loan: No      |
| Everest Consolidator Acquisition Corp  | Everest Consolidator Acquisition Corp  | CUSIP: 29978K102<br>LEI: N/A                  | Long             | EC               | CORP              | US        |      1594 | NS      | $18362.88     | 0.74%             |  |  |  | No            |                  3 | On Loan: No      |
| CONTRA AKERO THERAPEUT                 | CONTRA AKERO THERAPEUT                 | CUSIP: 009CVR044<br>LEI: 549300SI3KG74LBE2955 | N/A              | DE               |  | US        |       523 | NS      | $392.25       | 0.02%             |  |  |  | No            |                  3 | On Loan: No      |
| Churchill Capital Corp XI              | Churchill Capital Corp XI              | CUSIP: 000000000<br>LEI: N/A                  | Long             | EC               | CORP              | KY        |      1676 | NS      | $17296.32     | 0.70%             |  |  |  | No            |                  2 | On Loan: No      |
| JD.COM INC                             | JD.com Inc                             | CUSIP: 47215PAJ5<br>LEI: 549300HVTWB0GJZ16V92 | Long             | DBT              | CORP              | KY        |     72000 | PA      | $73479.60     | 2.97%             | 2029-06-01      | Fixed         | 0.25%                 | No            |                  2 | On Loan: No      |
| Brighthouse Financial Inc              | Brighthouse Financial Inc              | CUSIP: 10922N103<br>LEI: 5493003T8SZSHOGGAW52 | Long             | EC               | CORP              | US        |      1798 | NS      | $111943.48    | 4.53%             |  |  |  | No            |                  1 | On Loan: No      |
| Norfolk Southern Corp                  | Norfolk Southern Corp                  | CUSIP: 655844108<br>LEI: 54930036C8MWP850MI84 | Long             | EC               | CORP              | US        |       648 | NS      | $204657.84    | 8.28%             |  |  |  | No            |                  1 | On Loan: No      |
| Penumbra Inc                           | Penumbra Inc                           | CUSIP: 70975L107<br>LEI: 549300RGE06P3ECANU72 | Long             | EC               | CORP              | US        |       137 | NS      | $44727.76     | 1.81%             |  |  |  | No            |                  1 | On Loan: No      |
| Trade Desk Inc/The                     | Trade Desk Inc/The                     | CUSIP: 88339J105<br>LEI: 549300GXPD31VT3E0P46 | Long             | EC               | CORP              | US        |       525 | NS      | $12384.75     | 0.50%             |  |  |  | No            |                  1 | On Loan: No      |
| Mak Acquisition Corp                   | Mak Acquisition Corp                   | CUSIP: 000000000<br>LEI: N/A                  | N/A              | DE               |  | KY        |      2950 | NS      | $1062.00      | 0.04%             |  |  |  | No            |                  2 | On Loan: No      |
| Legato Merger Corp IV                  | Legato Merger Corp IV                  | CUSIP: 000000000<br>LEI: N/A                  | Long             | EC               | CORP              | KY        |        63 | NS      | $631.58       | 0.03%             |  |  |  | No            |                  2 | On Loan: No      |
| Black Hawk Acquisition Corp            | Black Hawk Acquisition Corp            | CUSIP: 000000000<br>LEI: N/A                  | N/A              | DE               |  | KY        |        81 | NS      | $105.30       | 0.00%             |  |  |  | No            |                  1 | On Loan: No      |
| TXNM ENERGY INC                        | TXNM Energy Inc                        | CUSIP: 69349HAF4<br>LEI: 5493003JOBJGLZSDDQ28 | Long             | DBT              | CORP              | US        |    114000 | PA      | $154051.62    | 6.23%             | 2054-06-01      | Fixed         | 5.75%                 | No            |                  2 | On Loan: No      |
| Alchemy Investments Acquisition Corp 1 | Alchemy Investments Acquisition Corp 1 | CUSIP: 000000000<br>LEI: N/A                  | Long             | EC               | CORP              | KY        |      1087 | NS      | $13011.39     | 0.53%             |  |  |  | No            |                  2 | On Loan: No      |
| MAK ACQUISITION CORP                   | MAK ACQUISITION CORP                   | CUSIP: 000000000<br>LEI: N/A                  | Long             | EC               | CORP              | KY        |       750 | NS      | $6.70         | 0.00%             |  |  |  | No            |                  2 | On Loan: No      |
| WOLFSPEED INC                          | Wolfspeed Inc                          | CUSIP: 977852AS1<br>LEI: 549300OGU88P3AW3TO93 | Long             | DBT              | CORP              | US        |      2586 | PA      | $2114.13      | 0.09%             | 2031-06-15      | Fixed         | 7.00%                 | No            |                  2 | On Loan: No      |
| Kenvue Inc                             | Kenvue Inc                             | CUSIP: 49177J102<br>LEI: 5493008HSF8L4M2LIJ82 | Long             | EC               | CORP              | US        |     10700 | NS      | $187571.00    | 7.59%             |  |  |  | No            |                  1 | On Loan: No      |
| Match Group Inc                        | Match Group Inc                        | CUSIP: 57667L107<br>LEI: 15OMOPB0A8K0EFUVD031 | Long             | EC               | CORP              | US        |       644 | NS      | $24098.48     | 0.97%             |  |  |  | No            |                  1 | On Loan: No      |
| Options Clearing Corp.                 | WOLFSPEED INC                          | CUSIP: 000000000<br>LEI: 549300CII6SLYGKNHA04 | N/A              | DE               |  | US        |        -2 | NC      | $-1925.00     | -0.08%            |  |  |  | No            |                  1 | On Loan: No      |
| NUTANIX INC                            | Nutanix Inc                            | CUSIP: 67059NAK4<br>LEI: 549300X7J6E8TKVIXW09 | Long             | DBT              | CORP              | US        |     97000 | PA      | $89460.19     | 3.62%             | 2029-12-15      | Fixed         | 0.50%                 | No            |                  2 | On Loan: No      |
| James Hardie Industries PLC            | James Hardie Industries PLC            | CUSIP: 000000000<br>LEI: 635400NSGXKTVOO7JU45 | Long             | EC               | CORP              | IE        |      3391 | NS      | $71177.09     | 2.88%             |  |  |  | No            |                  1 | On Loan: No      |
| BILL HOLDINGS INC                      | BILL Holdings Inc                      | CUSIP: 090043AF7<br>LEI: 549300IBF9VZZIGOZW63 | Long             | DBT              | CORP              | US        |     56000 | PA      | $49835.52     | 2.02%             | 2030-04-01      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| Abony Acquisition Corp I               | Abony Acquisition Corp I               | CUSIP: 000000000<br>LEI: N/A                  | Long             | EC               | CORP              | KY        |      2000 | NS      | $19950.00     | 0.81%             |  |  |  | No            |                  2 | On Loan: No      |
| Pfizer Inc                             | Pfizer Inc                             | CUSIP: 717081103<br>LEI: 765LHXWGK1KXCLTFYQ30 | Long             | EC               | CORP              | US        |      2745 | NS      | $73291.50     | 2.96%             |  |  |  | No            |                  1 | On Loan: No      |
| PAGERDUTY INC.                         | PagerDuty Inc                          | CUSIP: 69553PAD2<br>LEI: 549300U1SB749EDAGH21 | Long             | DBT              | CORP              | US        |     79000 | PA      | $72056.69     | 2.91%             | 2028-10-15      | Fixed         | 1.50%                 | No            |                  2 | On Loan: No      |
| Clearwater Analytics Holdings Inc      | Clearwater Analytics Holdings Inc      | CUSIP: 185123106<br>LEI: N/A                  | Long             | EC               | CORP              | US        |      4324 | NS      | $104640.80    | 4.23%             |  |  |  | No            |                  1 | On Loan: No      |
| Colombier Acquisition Corp III         | Colombier Acquisition Corp III         | CUSIP: 000000000<br>LEI: N/A                  | Long             | EC               | CORP              | KY        |      2648 | NS      | $26877.20     | 1.09%             |  |  |  | No            |                  1 | On Loan: No      |
| Wolfspeed Inc                          | Wolfspeed Inc                          | CUSIP: 97785W106<br>LEI: 549300OGU88P3AW3TO93 | Long             | EC               | CORP              | US        |       214 | NS      | $6319.42      | 0.26%             |  |  |  | No            |                  1 | On Loan: No      |
| AES Corp/The                           | AES Corp                               | CUSIP: 00130H105<br>LEI: 2NUNNB7D43COUIRE5295 | Long             | EC               | CORP              | US        |     10139 | NS      | $146508.55    | 5.92%             |  |  |  | No            |                  1 | On Loan: No      |
| Electronic Arts Inc                    | Electronic Arts Inc                    | CUSIP: 285512109<br>LEI: 549300O7A67PUEYKDL45 | Long             | EC               | CORP              | US        |       817 | NS      | $165336.29    | 6.69%             |  |  |  | No            |                  1 | On Loan: No      |
| Synopsys Inc                           | Synopsys Inc                           | CUSIP: 871607107<br>LEI: QG7T915N9S0NY5UKNE63 | Long             | EC               | CORP              | US        |        74 | NS      | $35712.40     | 1.44%             |  |  |  | No            |                  1 | On Loan: No      |
| GLOBAL PAYMENTS INC                    | Global Payments Inc                    | CUSIP: 37940XAU6<br>LEI: 549300NOMHGVQBX6S778 | Long             | DBT              | CORP              | US        |    132000 | PA      | $118687.80    | 4.80%             | 2031-03-01      | Fixed         | 1.50%                 | No            |                  2 | On Loan: No      |
| ProCap Acquisition Corp                | ProCap Acquisition Corp                | CUSIP: 000000000<br>LEI: N/A                  | Long             | EC               | CORP              | KY        |      1631 | NS      | $16668.82     | 0.67%             |  |  |  | No            |                  2 | On Loan: No      |
| Spark I Acquisition Corp               | Spark I Acquisition Corp               | CUSIP: 000000000<br>LEI: N/A                  | N/A              | DE               |  | KY        |       115 | NS      | $22.82        | 0.00%             |  |  |  | No            |                  1 | On Loan: No      |
| Boston Beer Co Inc/The                 | Boston Beer Co Inc/The                 | CUSIP: 100557107<br>LEI: 529900Q02MQ0DCQNRM58 | Long             | EC               | CORP              | US        |       255 | NS      | $60445.20     | 2.44%             |  |  |  | No            |                  1 | On Loan: No      |
| Kimberly-Clark Corp                    | Kimberly-Clark Corp                    | CUSIP: 494368103<br>LEI: MP3J6QPYPGN75NVW2S34 | Short            | EC               | CORP              | US        |     -1136 | NS      | $-111816.48   | -4.52%            |  |  |  | No            |                  1 | On Loan: No      |
| Four Leaf Acquisition Corp             | Four Leaf Acquisition Corp             | CUSIP: 35088F107<br>LEI: N/A                  | Long             | EC               | CORP              | US        |      4527 | NS      | $49797.00     | 2.01%             |  |  |  | No            |                  2 | On Loan: No      |
| GAMESTOP CORP                          | GameStop Corp                          | CUSIP: 36467WAF6<br>LEI: 549300505KLOET039L77 | Long             | DBT              | CORP              | US        |     65000 | PA      | $70506.15     | 2.85%             | 2032-06-15      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| Blackbaud Inc                          | Blackbaud Inc                          | CUSIP: 09227Q100<br>LEI: 54930056X3HKFMNG3754 | Long             | EC               | CORP              | US        |       262 | NS      | $9738.54      | 0.39%             |  |  |  | No            |                  1 | On Loan: No      |
| FutureTech II Acquisition Corp         | FutureTech II Acquisition Corp         | CUSIP: 36119D103<br>LEI: N/A                  | Long             | EC               | CORP              | US        |     12115 | NS      | $145622.30    | 5.89%             |  |  |  | No            |                  2 | On Loan: No      |

### Signature

**Date Signed:** 2026-05-18

**Name of Applicant:** CALAMOS INVESTMENT TRUST/IL

**Signature:** Stephen Atkins

**Name of Signer:** Stephen Atkins

**Title:** Treasurer