UPS, the logistics and package delivery company, is sliding after posting weaker than expected fourth quarter earnings.

Earnings came in at $1.63 per share for the quarter, below analysts’ estimates of $1.69. Revenue was also light at $16.9 billion versus projections of $17 billion for the quarter.

Guidance was also below market expectations. UPS said it expected 2017 full-year earnings per share between $5.80 and $6.10 a share, lower than the $6.17 expected by Wall Street.

“The International segment delivered another extraordinary performance, while the US managed through considerable changes in product mix,” said UPS CEO David Abney in a press release accompanying earnings.

Shares of the company were down just over 4% in pre-market trading as of 8:19 a.m. ET.