NEW YORK (CNNMoney.com) - Burger King's hot-off-the-grill offering could heat up the IPO market for other companies looking to go public next week.

Burger King, the world's No. 2 hamburger chain, expects to offer 25 million shares at an estimated price of $15 to $17 a share. The company plans to list on the New York Stock Exchange under the ticker "BKC". (Full story.)

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Penson Worldwide, which provides processing services and products for hedge funds, banks, brokerages and others in the investment industry, plans to sell 7.47 million shares at an expected price of $15 to $17 a share.

The Dallas-based company is slated to list on the Nasdaq under the symbol "PNSN". The company said it expects to use the money raised from the offering to pay back debt and for a corporate reorganization. Credit Suisse First Boston and J.P. Morgan Securities are the lead underwriters of the deal.

Darwin Professional Underwriters is a specialty insurance group that provides liability insurance for the medical industry and for professionals outside of the health field. The company expects to sell 5.21 million shares at an estimated price of $15 to $17 a share. Credit Suisse and Merrill Lynch are the deal's lead underwriters.

The company, which is based in Farmington, Conn., plans to use the money raised from its IPO to redeem shares from its parent Alleghany Corp. (Research), which will own nearly 60 percent of the company's shares after the offering. Darwin Professional Underwriters intends to list on the New York Stock Exchange under the symbol "DR".

Restore Medical makes medical devices used to treat disruptive snoring. The company plans to sell 4 million shares at an expected price of $9 to $11 a share. Deutsche Bank and RBC Capital Markets are the lead managers of the deal.

The St. Paul, Minn.-based company intends to use money raised from the offering to expand its domestic and international marketing, develop new products and increase clinical studies. Restore Medical aims to list on the Nasdaq under the ticker "REST".

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