The company priced per share at $45. During the morning trading, the company's stock was traded at $83 per share and quickly jumped over $90 per share.
At $90 a share, LinkedIn was valued at about $8.5 billion, making the eight-year-old company one of the largest technology IPOs since Google in 2004.
The company has planned to raise around $350 million, aiming at improving its professional networking service.
It raised its IPO pricing range earlier this week to $45 dollars a share from $35 due to strong demand from investors.