Company: CHY
Filing Date: 2025-02-21
Form Type: N-2ASR
Source: 0001104659-25-016081
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Company: CALAMOS CONVERTIBLE & HIGH INCOME FUND
Filing Date: 2025-02-21
Form: N-2ASR
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As filed with the Securities and Exchange Commission on February 21, 2025 1933 Act File No. [ ] 1940 Act File No. 811-21319 U.S. SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM N-2 (Check appropriate box or boxes) ☒ REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 ☐ Pre-Effective Amendment No. ☐ Post-Effective Amendment No. And ☒ REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940 ☒ Amendment No. 41 CALAMOS CONVERTIBLE AND HIGH INCOME FUND 2020 Calamos Court Naperville, Illinois 60563 ( 630) 245-7200 Agent for Service John P. Calamos, Sr. President Calamos Convertible and High Income Fund 2020 Calamos Court Naperville, Illinois 60563 Copies of Communications to:

| Paulita A. Pike         | Rita Rubin              |
| Ropes & Gray LLP        | Ropes & Gray LLP        |
| 191 North Wacker Drive  | 191 North Wacker Drive  |
| 32nd Floor              | 32nd Floor              |
| Chicago, Illinois 60606 | Chicago, Illinois 60606 |

Approximate Date of Proposed Public Offering: From time to time after the effective date of this Registration Statement. If the only securities being registered on this Form are being offered pursuant to dividend or interest reinvestment plans, check the following box ☐. If any of the securities being registered on this form will be offered on a delayed or continuous basis in reliance on Rule 415 under the Securities Act of 1933, as amended (the “Securities Act”), other than securities offered in connection with a dividend reinvestment plan, check the following box. ☒ If this Form is a registration statement pursuant to General Instruction A.2 or a post-effective amendment thereto, check the following box ☒. If this Form is a registration statement pursuant to General Instruction B or a post-effective amendment thereto that will become effective upon filing with the Commission pursuant to Rule 462(e) under the Securities Act, check the following box ☒. If this Form is a post-effective amendment to a registration statement filed pursuant to General Instruction B to register additional securities or additional classes of securities pursuant to Rule 413(b) under the Securities Act, check the following box ☐. It is proposed that this filing will become effective (