Company: CHY
Filing Date: 2025-02-21
Form Type: N-2ASR
Source: 0001104659-25-016081
Chunk: 165

Company: CALAMOS CONVERTIBLE & HIGH INCOME FUND
Filing Date: 2025-02-21
Form: N-2ASR
Chunk 165
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 information in this prospectus supplement is not complete and may be changed. We may not sell these securities until the registration statement filed with the Securities and Exchange Commission is effective. This prospectus supplement is not an offer to sell these securities and is not soliciting an offer to buy these securities in any jurisdiction where the offer or sale is not permitted. Prospectus Supplement
(To Prospectus dated [], 2025) Calamos Convertible and High Income Fund Up to [__] Common Shares Calamos Convertible and High Income Fund (the “Fund,” “we,” “us,” or “our”) is a diversified, closed-end management investment company that commenced investment operations in May 2003. Our investment objective is to provide total return through a combination of capital appreciation and current income. Our common shares are listed on the Nasdaq Global Select Market (“Nasdaq”) under the symbol “CHY.” As of [ ], 2025, the last reported sale price for our common shares was $[ ] per share. As of January [ ], 20[ ], the last reported net asset value for our common shares was $[ ]. Sales of our common shares, if any, under this prospectus supplement and the accompanying prospectus may be made in negotiated transactions or transactions that are deemed to be “at the market” as defined in Rule 415 under the Securities Act of 1933, as amended (the “1933 Act”), including sales made directly on the Nasdaq or sales made to or through a market maker other than on an exchange.

|                                  |     | Per Share |     | Total(1) |
|:---------------------------------|:----|:----------|:----|:---------|
| Public offering price            |     | $         |     | $        |
| Sales load                       |     | $         |     | $        |
| Proceeds to us (before expenses) |     | $         |     | $        |

(1) The aggregate expenses of the offering are estimated to be $[], which represents approximately $ per share. The underwriters may also purchase up to an additional [] common shares from the Fund at the public offering price, less underwriting discounts and commissions if any, within [] days after the date of this prospectus supplement. If the over-allotment option is exercised in full, the total proceeds, before expenses, to the Fund would be $[] and the total underwriting discounts and commissions would be $[]. The common shares will be ready for delivery on or about []. Investing