The shares of several market newcomers, and some just new to the U.S., surged in their debuts Friday.

The interest in IPOs is up again as investors' appetite for risk has improved with the market's recent gains. So far, 257 initial public offerings have priced in 2013, up nearly 43% from last year, according to research group Renaissance Capital.

Here's a look at how some of the companies that held offerings Friday fared by midday:

  • Vince Holding Corp., formerly known as Apparel Holding Corp., priced its offering of 10 million shares at $20 each, raising $200 million. The New York clothing company's shares soared nearly 42% to $28.35. Its shares are listed on the New York Stock Exchange under the symbol "VNCE".
  • Sungy Mobile Ltd., a Chinese mobile Internet products maker, priced its offering of 7 million American depository shares at $11.22 each, for a total offering size of $78.54 million. Each of these shares represents six of its ordinary shares. Its American depository shares, trading on the Nasdaq under the symbol "GOMO", jumped nearly 41% to $15.
  • 500.com, a Chinese company that provides online sports lottery services, priced its offering of nearly 6 million American depository shares at $13 each for a total offering of $75.2 million. Each of these shares represents 10 of the company's ordinary shares. Its American depository shares, which are trading on the New York Stock Exchange under the ticker symbol "WBAI", surged more than 54% to $20.04.
  • Oxford Immunotec Global PLC priced its offering of 5.36 million shares at $12 each, raising $64.3 million. Shares of the medical diagnostic company, headquartered in the U.K. and Marlborough, Mass., rose 25% at $14.92. Its stock is listed under the symbol "OXFD" on the Nasdaq.

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