Stocks making the biggest moves after hours:

$Ceridian HCM Holding(CDAY.US)$
— The software company got a 6.5% boost in its shares in extended trading after it posted earnings, excluding items, that almost doubled analysts' expectations and reported better-than-expected revenue, according to FactSet. Guidance for the first quarter also came in more upbeat than analysts' forecast.
$Lincoln National(LNC.US)$
— The life insurance company slipped 2.5% in after-hours trading after it issued fourth-quarter results that came below Wall Street's expectations. Lincoln National posted earnings of 97 cents per share on revenue of $4.2 billion. Analysts called for per-share earnings of $1.83 on revenue of $4.59 billion, according to FactSet.
$Wynn Resorts(WYNN.US)$
— The hotel and casino operator’s shares rose 3%. Although the company reported $1 billion in revenue for the latest quarter, compared to analysts’ expectations of $958 million, according to Refinitiv. It also reported an adjusted loss of $1.23 per share.
$MGM Resorts International(MGM.US)$
— Shares of the casino stock ticked up 2%. MGM beat analysts’ estimates on fourth-quarter revenue, posting $3.59 billion compared to the $3.35 billion expected by Wall Street, according to Refinitiv. However, the company posted a wider-than-expected loss of $1.53 per share, versus the $1.36 loss per share predicted by analysts.