# EDGAR Filing Document

**Accession Number:** 0000826732
**File Stem:** 0001410368-26-034364
**Filing Date:** 2026-3
**Character Count:** 23126
**Document Hash:** 41db37cb11de4981b8a36328a82d20e0
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001410368-26-034364.hdr.sgml**: 20260331

**ACCESSION NUMBER**: 0001410368-26-034364

**CONFORMED SUBMISSION TYPE**: NPORT-P

**PUBLIC DOCUMENT COUNT**: 2

**CONFORMED PERIOD OF REPORT**: 20260131

**FILED AS OF DATE**: 20260331

**DATE AS OF CHANGE**: 20260331

**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:** 26820676

**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:** 2026-01-31

**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:** $3704237.72

**Total Liabilities:** $978317.92

**Net Assets:** $2725919.80

**Cash Not Reported:** $336836.64

**Currency Risk Metrics (dv01):**

- 

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

- **3-Month:** -0.73000000 | **1-Year:** -12.14000000 | **5-Year:** -59.10000000 | **10-Year:** -1.16000000 | **30-Year:** 0.00000000

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

- **3-Month:** -3.99000000 | **1-Year:** -97.28000000 | **5-Year:** -224.30000000 | **10-Year:** -3.71000000 | **30-Year:** 0.00000000

**Monthly Return Information**

| Class               | Month 1 Return (%)   | Month 2 Return (%)   | Month 3 Return (%)   |
|:---|:---|:---|:---|
| Class ID C000243949 | -0.19%               | 1.36%                | 0.89%                |
| Class ID C000243950 | -0.37%               | 1.38%                | 0.69%                |
| Class ID C000243951 | -0.28%               | 1.47%                | 0.79%                |

**Monthly Gains & Losses**

| Period   | Net Realized Gain/Loss   | Net Unrealized Appreciation/Depreciation   |
|:---|:---|:---|
| Month 1  | $6402.30                 | $-18699.75                                 |
| Month 2  | $7415.27                 | $28988.21                                  |
| Month 3  | $41133.24                | $-21471.72                                 |

**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   |
|:---|:---|:---|:---|:---|:---|:---|---:|:---|:---|:---|:---|:---|:---|:---|---:|:---|
| CONTRA AKERO THERAPEUT                 | CONTRA AKERO THERAPEUT                 | CUSIP: 009CVR044<br>LEI: 549300SI3KG74LBE2955 | N/A              | DE               |  | US        |       523 | NS      | $392.25       | 0.01%             |  |  |  | No            |                  3 | On Loan: No      |
| ALKAMI TECHNOLOGY INC                  | Alkami Technology Inc                  | CUSIP: 01644JAA6<br>LEI: 254900FCNYU4HNEV9L47 | Long             | DBT              | CORP              | US        |     78000 | PA      | $77515.62     | 2.84%             | 2030-03-15      | Fixed         | 1.50%                 | No            |                  2 | On Loan: No      |
| BILL HOLDINGS INC                      | BILL Holdings Inc                      | CUSIP: 090043AF7<br>LEI: 549300IBF9VZZIGOZW63 | Long             | DBT              | CORP              | US        |    110000 | PA      | $98620.50     | 3.62%             | 2030-04-01      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| Blackbaud Inc                          | Blackbaud Inc                          | CUSIP: 09227Q100<br>LEI: 54930056X3HKFMNG3754 | Long             | EC               | CORP              | US        |       509 | NS      | $27333.30     | 1.00%             |  |  |  | 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      | $54473.10     | 2.00%             |  |  |  | No            |                  1 | On Loan: No      |
| CSG SYSTEMS INTERNATIONA               | CSG Systems International Inc          | CUSIP: 126349AH2<br>LEI: 549300D7FJZUOHHXUA81 | Long             | DBT              | CORP              | US        |     37000 | PA      | $44997.92     | 1.65%             | 2028-09-15      | Fixed         | 3.88%                 | No            |                  2 | On Loan: No      |
| DAYFORCE INC                           | Dayforce Inc                           | CUSIP: 15677JAD0<br>LEI: 549300T64GVCHFJ8L449 | Long             | DBT              | CORP              | US        |    118000 | PA      | $117374.60    | 4.31%             | 2026-03-15      | Fixed         | 0.25%                 | No            |                  2 | On Loan: No      |
| Chart Industries Inc                   | Chart Industries Inc                   | CUSIP: 16115Q308<br>LEI: EM7QGKC1GYOF3LSZSL80 | Long             | EC               | CORP              | US        |       197 | NS      | $40845.98     | 1.50%             |  |  |  | No            |                  1 | 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     | 0.67%             |  |  |  | No            |                  3 | On Loan: No      |
| EXACT SCIENCES CORP                    | Exact Sciences Corp                    | CUSIP: 30063PAD7<br>LEI: 549300VM3X1FYD4N9Z14 | Long             | DBT              | CORP              | US        |     77000 | PA      | $107041.55    | 3.93%             | 2030-03-01      | Fixed         | 2.00%                 | No            |                  2 | On Loan: No      |
| EXACT SCIENCES CORP                    | Exact Sciences Corp                    | CUSIP: 30063PAE5<br>LEI: 549300VM3X1FYD4N9Z14 | Long             | DBT              | CORP              | US        |     38000 | PA      | $46750.64     | 1.72%             | 2031-04-15      | Fixed         | 1.75%                 | No            |                  2 | On Loan: No      |
| FIVE9 INC                              | Five9 Inc                              | CUSIP: 338307AF8<br>LEI: 254900MXP6EWY0SFFR59 | Long             | DBT              | CORP              | US        |     90000 | PA      | $81358.20     | 2.98%             | 2029-03-15      | Fixed         | 1.00%                 | No            |                  2 | On Loan: No      |
| Four Leaf Acquisition Corp             | Four Leaf Acquisition Corp             | CUSIP: 35088F107<br>LEI: N/A                  | Long             | EC               | CORP              | US        |      4527 | NS      | $53192.25     | 1.95%             |  |  |  | No            |                  2 | 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    | 5.34%             |  |  |  | No            |                  2 | On Loan: No      |
| GAMESTOP CORP                          | GameStop Corp                          | CUSIP: 36467WAF6<br>LEI: 549300505KLOET039L77 | Long             | DBT              | CORP              | US        |     65000 | PA      | $70235.10     | 2.58%             | 2032-06-15      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| GLOBAL PAYMENTS INC                    | Global Payments Inc                    | CUSIP: 37940XAU6<br>LEI: 549300NOMHGVQBX6S778 | Long             | DBT              | CORP              | US        |    137000 | PA      | $121418.99    | 4.45%             | 2031-03-01      | Fixed         | 1.50%                 | No            |                  2 | On Loan: No      |
| JD.COM INC                             | JD.com Inc                             | CUSIP: 47215PAJ5<br>LEI: 549300HVTWB0GJZ16V92 | Long             | DBT              | CORP              | KY        |     72000 | PA      | $72684.00     | 2.67%             | 2029-06-01      | Fixed         | 0.25%                 | No            |                  2 | On Loan: No      |
| Kenvue Inc                             | Kenvue Inc                             | CUSIP: 49177J102<br>LEI: 5493008HSF8L4M2LIJ82 | Long             | EC               | CORP              | US        |      9700 | NS      | $168780.00    | 6.19%             |  |  |  | No            |                  1 | On Loan: No      |
| Kimberly-Clark Corp                    | Kimberly-Clark Corp                    | CUSIP: 494368103<br>LEI: MP3J6QPYPGN75NVW2S34 | Short            | EC               | CORP              | US        |      -993 | NS      | $-99290.07    | -3.64%            |  |  |  | No            |                  1 | On Loan: No      |
| Match Group Inc                        | Match Group Inc                        | CUSIP: 57667L107<br>LEI: 15OMOPB0A8K0EFUVD031 | Long             | EC               | CORP              | US        |       644 | NS      | $20060.60     | 0.74%             |  |  |  | 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      |
| Norfolk Southern Corp                  | Norfolk Southern Corp                  | CUSIP: 655844108<br>LEI: 54930036C8MWP850MI84 | Long             | EC               | CORP              | US        |       423 | NS      | $123194.52    | 4.52%             |  |  |  | No            |                  1 | On Loan: No      |
| NUTANIX INC                            | Nutanix Inc                            | CUSIP: 67059NAK4<br>LEI: 549300X7J6E8TKVIXW09 | Long             | DBT              | CORP              | US        |     97000 | PA      | $88284.55     | 3.24%             | 2029-12-15      | Fixed         | 0.50%                 | No            |                  2 | On Loan: No      |
| TXNM ENERGY INC                        | TXNM Energy Inc                        | CUSIP: 69349HAF4<br>LEI: 5493003JOBJGLZSDDQ28 | Long             | DBT              | CORP              | US        |    114000 | PA      | $153715.32    | 5.64%             | 2054-06-01      | Fixed         | 5.75%                 | No            |                  2 | On Loan: No      |
| PAGERDUTY INC.                         | PagerDuty Inc                          | CUSIP: 69553PAD2<br>LEI: 549300U1SB749EDAGH21 | Long             | DBT              | CORP              | US        |     79000 | PA      | $74109.90     | 2.72%             | 2028-10-15      | Fixed         | 1.50%                 | No            |                  2 | On Loan: No      |
| Palo Alto Networks Inc                 | Palo Alto Networks Inc                 | CUSIP: 697435105<br>LEI: 549300QXR2YVZV231H43 | Short            | EC               | CORP              | US        |      -550 | NS      | $-97333.50    | -3.57%            |  |  |  | No            |                  1 | On Loan: No      |
| Pfizer Inc                             | Pfizer Inc                             | CUSIP: 717081103<br>LEI: 765LHXWGK1KXCLTFYQ30 | Long             | EC               | CORP              | US        |      2840 | NS      | $75089.60     | 2.75%             |  |  |  | No            |                  1 | On Loan: No      |
| Quetta Acquisition Corp                | Quetta Acquisition Corp                | CUSIP: 74841A113<br>LEI: N/A                  | N/A              | DE               |  | US        |        23 | NS      | $37.72        | 0.00%             |  |  |  | No            |                  1 | On Loan: No      |
| RAPID7 INC                             | Rapid7 Inc                             | CUSIP: 753422AH7<br>LEI: 549300GNVG5D60KEYN14 | Long             | DBT              | CORP              | US        |     60000 | PA      | $54837.00     | 2.01%             | 2029-03-15      | Fixed         | 1.25%                 | No            |                  2 | On Loan: No      |
| SHIFT4 PAYMENTS INC                    | Shift4 Payments Inc                    | CUSIP: 82452JAD1<br>LEI: N/A                  | Long             | DBT              | CORP              | US        |     80000 | PA      | $77005.60     | 2.82%             | 2027-08-01      | Fixed         | 0.50%                 | No            |                  2 | On Loan: No      |
| TaskUS Inc                             | TaskUS Inc                             | CUSIP: 87652V109<br>LEI: 549300VFPOK2Y6GLWE32 | Long             | EC               | CORP              | US        |      3030 | NS      | $32724.00     | 1.20%             |  |  |  | No            |                  1 | On Loan: No      |
| TEGNA Inc                              | TEGNA Inc                              | CUSIP: 87901J105<br>LEI: 549300YC5EDBGX85AO10 | Long             | EC               | CORP              | US        |      8139 | NS      | $155943.24    | 5.72%             |  |  |  | No            |                  1 | On Loan: No      |
| Union Pacific Corp                     | Union Pacific Corp                     | CUSIP: 907818108<br>LEI: 549300LMMRSZZCZ8CL11 | Short            | EC               | CORP              | US        |      -423 | NS      | $-99447.30    | -3.65%            |  |  |  | No            |                  1 | On Loan: No      |
| Warner Bros Discovery Inc              | Warner Bros Discovery Inc              | CUSIP: 934423104<br>LEI: 5493006ZCRFWKF6B1K26 | Long             | EC               | CORP              | US        |       725 | NS      | $19966.50     | 0.73%             |  |  |  | No            |                  1 | On Loan: No      |
| WOLFSPEED INC                          | Wolfspeed Inc                          | CUSIP: 977852AS1<br>LEI: 549300OGU88P3AW3TO93 | Long             | DBT              | CORP              | US        |      2586 | PA      | $2112.37      | 0.08%             | 2031-06-15      | Fixed         | 7.00%                 | No            |                  2 | On Loan: No      |
| Wolfspeed Inc                          | Wolfspeed Inc                          | CUSIP: 97785W106<br>LEI: 549300OGU88P3AW3TO93 | Long             | EC               | CORP              | US        |       214 | NS      | $3351.24      | 0.12%             |  |  |  | No            |                  1 | 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      |
| Options Clearing Corp.                 | WOLFSPEED INC                          | CUSIP: 000000000<br>LEI: 549300CII6SLYGKNHA04 | N/A              | DE               |  | US        |        -2 | NC      | $-163.00      | -0.01%            |  |  |  | No            |                  1 | On Loan: No      |
| Alchemy Investments Acquisition Corp 1 | Alchemy Investments Acquisition Corp 1 | CUSIP: 000000000<br>LEI: N/A                  | Long             | EC               | CORP              | KY        |       468 | NS      | $5461.56      | 0.20%             |  |  |  | No            |                  2 | On Loan: No      |
| Archimedes Tech SPAC Partners III Co   | Archimedes Tech SPAC Partners III Co   | CUSIP: 000000000<br>LEI: N/A                  | Long             | EC               | CORP              | KY        |      1000 | NS      | $10100.00     | 0.37%             |  |  |  | No            |                  2 | On Loan: No      |
| American Drive Acquisition Co          | American Drive Acquisition Co          | CUSIP: 000000000<br>LEI: N/A                  | Long             | EC               | CORP              | KY        |      2208 | NS      | $22080.00     | 0.81%             |  |  |  | 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      | $111.78       | 0.00%             |  |  |  | No            |                  1 | On Loan: No      |
| Churchill Capital Corp XI              | Churchill Capital Corp XI              | CUSIP: 000000000<br>LEI: N/A                  | Long             | EC               | CORP              | KY        |      1676 | NS      | $17262.80     | 0.63%             |  |  |  | No            |                  1 | On Loan: No      |
| James Hardie Industries PLC            | James Hardie Industries PLC            | CUSIP: 000000000<br>LEI: 635400NSGXKTVOO7JU45 | Long             | EC               | CORP              | IE        |      2396 | NS      | $55084.04     | 2.02%             |  |  |  | No            |                  1 | On Loan: No      |
| ITHAX Acquisition Corp III             | ITHAX Acquisition Corp III             | CUSIP: 000000000<br>LEI: N/A                  | Long             | EC               | CORP              | KY        |       427 | NS      | $4270.00      | 0.16%             |  |  |  | No            |                  2 | On Loan: No      |
| KRAKacquisition Corp                   | KRAKacquisition Corp                   | CUSIP: 000000000<br>LEI: N/A                  | Long             | EC               | CORP              | KY        |      4002 | NS      | $40560.27     | 1.49%             |  |  |  | No            |                  1 | On Loan: No      |
| Lafayette Digital Acquisition Corp I   | Lafayette Digital Acquisition Corp I   | CUSIP: 000000000<br>LEI: N/A                  | Long             | EC               | CORP              | KY        |      2000 | NS      | $20000.00     | 0.73%             |  |  |  | No            |                  2 | 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      |
| Mountain Lake Acquisition Corp II      | Mountain Lake Acquisition Corp II      | CUSIP: 000000000<br>LEI: N/A                  | Long             | EC               | CORP              | KY        |      3130 | NS      | $31268.70     | 1.15%             |  |  |  | No            |                  1 | On Loan: No      |
| ProCap Acquisition Corp                | ProCap Acquisition Corp                | CUSIP: 000000000<br>LEI: N/A                  | Long             | EC               | CORP              | KY        |        38 | NS      | $387.98       | 0.01%             |  |  |  | No            |                  2 | On Loan: No      |
| Legato Merger Corp IV                  | Legato Merger Corp IV                  | CUSIP: 000000000<br>LEI: N/A                  | Long             | EC               | CORP              | KY        |      1563 | NS      | $15676.89     | 0.58%             |  |  |  | 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      | $39.58        | 0.00%             |  |  |  | No            |                  2 | On Loan: No      |
| Space Asset Acquisition Corp           | Space Asset Acquisition Corp           | CUSIP: 000000000<br>LEI: N/A                  | Long             | EC               | CORP              | KY        |      2001 | NS      | $20390.19     | 0.75%             |  |  |  | No            |                  1 | On Loan: No      |
| X3 Acquisition Corp Ltd                | X3 Acquisition Corp Ltd                | CUSIP: 000000000<br>LEI: N/A                  | Long             | EC               | CORP              | KY        |      1157 | NS      | $11570.00     | 0.42%             |  |  |  | No            |                  1 | On Loan: No      |
| CyberArk Software Ltd                  | CyberArk Software Ltd                  | CUSIP: 000000000<br>LEI: 529900YEXNDM894PWS93 | Long             | EC               | CORP              | IL        |       250 | NS      | $107707.50    | 3.95%             |  |  |  | No            |                  1 | On Loan: No      |

### Signature

**Date Signed:** 2026-03-11

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

**Signature:** Stephen Atkins

**Name of Signer:** Stephen Atkins

**Title:** Treasurer