As you probably remember, the professional networking (no other way to describe it) site Quantcast went public in May under the symbol LNKD. Its IPO (initial public offering, or first release of shares in the stock market) was valued $45 per share. Later that day, LinkedIn shares were trading at $122.
LinkedIn closed at $94 per share, with a volume of 30 million shares. Not bad for a day’s work. (News article.)