Company: CHY
Filing Date: 2025-12-29
Form Type: N-CSR
Source: 0001104659-25-124662
Chunk: 0

Company: CALAMOS CONVERTIBLE & HIGH INCOME FUND
Filing Date: 2025-12-29
Form: N-CSR
Chunk 0
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UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-CSR CERTIFIED SHAREHOLDER REPORT OF REGISTERED MANAGEMENT INVESTMENT COMPANIES

| INVESTMENT COMPANY ACT FILE NUMBER: | 811-21319 |

| EXACT NAME OF REGISTRANT AS SPECIFIED IN CHARTER: | Calamos Convertible and High Income Fund    |
| ADDRESS OF PRINCIPAL EXECUTIVE OFFICES:           | 2020 Calamos Court                          
 Naperville, Illinois 60563-2787             |
| NAME AND ADDRESS OF AGENT FOR SERVICE:            | John P. Calamos, Sr., Founder, Chairman and 
 Global Chief Investment Officer             
 Calamos Advisors LLC                        
 2020 Calamos Court                          
 Naperville, Illinois 60563-2787             |

REGISTRANT’S TELEPHONE NUMBER, INCLUDING AREA CODE: (630) 245-7200 DATE OF FISCAL YEAR END: October 31, 2025 DATE OF REPORTING PERIOD: November 1, 2024 through October 31, 2025

Item 1. Reports to Stockholders. 1(a) Reports to Stockholders TIMELY INFORMATION INSIDE Family of Closed-End Funds ANNUAL REPORT OCTOBER 31, 2025 Domestic Funds Calamos Convertible Opportunities and Income Fund (Ticker: CHI) Calamos Convertible and High Income Fund (Ticker: CHY) Calamos Strategic Total Return Fund (Ticker: CSQ) Calamos Dynamic Convertible and Income Fund (Ticker: CCD) Global Funds Calamos Global Dynamic Income Fund (Ticker: CHW) Calamos Global Total Return Fund (Ticker: CGO) Calamos Long/Short Equity & Dynamic Income Trust (Ticker: CPZ) Visit www.calamos.com/paperless to enroll. You can view shareholder communications, including fund prospectuses, annual reports and other shareholder materials online long before the printed publications arrive by traditional mail. Experience and Foresight Calamos is a trusted and leading provider of closed-end funds that use a diversified blend of convertible securities, equities, fixed income, and alternative investments across innovative investment strategies to support competitive distributions throughout a market cycle. Our Distribution Policies* Closed-end fund investors often seek a steady stream of income. Recognizing this important need, Calamos Strategic Total Return Fund (CSQ) and Calamos Long/Short Equity & Dynamic Income Trust (CPZ) adhere to a managed distribution policy, while Calamos Dynamic Convert