Shares of Qualys Inc. (QLYS) - Get Report tumbled 17.02% to $80 in premarket trading Wednesday after the cloud computing company's first-quarter guidance range came in under Wall Street's expectations.

The Foster City, California-based company reported fourth-quarter earnings of $14.4 million, or 35 cents a share, compared with $2.9 million, or 7 cents a share, a year ago. Adjusted earnings came to 51 cents a share, beating analysts' expectations of 40 cents a share.

Revenue totaled $74.2 million, up 18% from $62.9 million a year ago, and matched Wall Street's expectations.

For the year, the company reported earnings of $57.3 million, or $1.37 a share. Revenue totaled $278.9 million, up 21% from a year ago.

For the first quarter, the company said it is expecting revenue to range from $74.5 million to $75.2 million, and adjusted earnings between 41 cents and 43 cents a share. Analysts are looking for first-quarter adjusted earnings of 42 cents a share on sales of $77 million.

Qualys expects full-year earnings in the range of $1.84 to $1.89 a share, with revenue ranging from $320 million to $323 million.