Company: CHY
Filing Date: 2025-05-12
Form Type: DEF 14A
Source: 0001104659-25-047185
Chunk: 2

Company: CALAMOS CONVERTIBLE & HIGH INCOME FUND
Filing Date: 2025-05-12
Form: DEF 14A
Chunk 2
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 statement. If you have any questions about the enclosed proxy or need any assistance in voting your shares, please call 1-800-582-6959.

Your vote is important. Please complete, sign, and date the enclosed proxy card and return it in the enclosed envelope or register your vote online or by telephone according to the instructions on the proxy card. This will ensure that your vote is counted, even if you cannot attend the meeting.

Sincerely,

John P. Calamos, Sr.
Trustee and President

<div align='center'>CALAMOS ®CONVERTIBLE OPPORTUNITIES AND INCOME FUND

CALAMOS ®CONVERTIBLE AND HIGH INCOME FUND

CALAMOS ®STRATEGIC TOTAL RETURN FUND

CALAMOS ®GLOBAL TOTAL RETURN FUND

CALAMOS ®GLOBAL DYNAMIC INCOME FUND

CALAMOS ®DYNAMIC CONVERTIBLE AND INCOME FUND

CALAMOS ®LONG/SHORT EQUITY & DYNAMIC INCOME TRUST

Answers to Some Important Questions</div>

Q.What am I being asked to vote "For" on this proxy?

A.You are asked to vote for the election of trustees to the board of each Fund for which you are an eligible shareholder.

Q.How does the board of trustees suggest that I vote?

A.The trustees of each Fund unanimously recommend that you vote "For" the nominees on the enclosed proxy card(s).

Q.How can I vote?

A.Details about voting can be found in the proxy statement under the heading "More Information about the Meeting — How to Vote."

You can vote by completing, signing and dating your proxy card, and mailing it in the enclosed envelope or by registering your vote online or by telephone according to the instructions on the proxy card.

You may vote at the meeting if you attend the meeting.However, even if you plan to attend, we urge you to cast your vote by mail or by registering your vote online or by telephone according to the instructions on the proxy card.That will ensure that your vote is counted, should your plans change.

<div align='center'>CALAMOS ®CONVERTIBLE OPPORTUNITIES AND INCOME FUND

CALAMOS ®CONVERTIBLE AND HIGH INCOME FUND

CALAMOS ®STRATEGIC TOTAL RETURN FUND

CALAMOS ®GLOBAL TOTAL RETURN FUND

CALAMOS ®GLOBAL DYNAMIC INCOME FUND

CALAMOS ®DYNAMIC CONVERTIBLE AND INCOME FUND

CALAMOS ®LONG/SHORT E