U.S. stock futures were mixed this morning, with the Dow futures gaining over 100 points on Thursday.

Shares of Western Digital Corp (NASDAQ:WDC) fell sharply in pre-market trading following fourth-quarter results.

Western Digital reported quarterly earnings of $3.56 per share, which beat the Street estimate of $3.29 by 7.88%, according to Benzinga Pro data.

Quarterly revenue came in at $3.75 billion, which beat the consensus estimate of $3.69 billion and was up from $2.61 billion in the same period last year.

Western Digital said it expects first quarter adjusted EPS of $3.85 to $4.15, versus the $3.81 estimate, and revenue of $4 billion to $4.2 billion, versus the $4.01 billion analyst estimate.