Trade Desk Inc. TTD, +1.62% shares shot up in the extended session Thursday after better-than-expected 2018 guidance and adjusted earnings beat analyst models. Trade Desk shares rose 12.6% after hours. The company reported fourth-quarter net income of $16.8 million, or 38 cents a share, compared with $10.3 million, or 24 cents a share, in the year-ago period. Adjusted earnings were 55 cents a share. Revenue rose to $102.6 million from $72.4 million in the year-ago period. Analysts surveyed by FactSet had estimated adjusted earnings of 44 cents a share on revenue of $101.7 million. For the first quarter, analysts model adjusted earnings of 10 cents a share on sales of $64.4 million. The company said it expected first-quarter sales of $73 million and full-year sales of "at least" $403 million; analysts modeled full-year sales of $391.3 million. Trade Desk stock has gained 41% in the past year, with the S&P 500 index SPX, -1.11% rising 14%.