Pacer International, also known as Pacer Stacktrain, is a former major North American provider of intermodal services that was owned by XPO, Inc. (NYSE: XPO), which in 2022 sold it to STG Logistics. In January 2026, STG Logistics filed for Chapter 11 bankruptcy protection following a debt deal that sparked litigation by creditors.

With the acquisition of Pacer International on March 31, 2014, XPO, Inc. became the third largest provider of intermodal services in North America and the largest provider of cross-border Mexico intermodal. The business facilitates one of the most comprehensive double-stack intermodal networks in North America, with access to more than 60,000 miles (97,000 km) of rail routes and a nationwide relationships with independent truck drayage carriers.

The former Pacer operations have been integrated into the XPO, Inc. service offering, which includes truck brokerage, intermodal, ground and air expedition, last mile logistics, contract logistics, freight forwarding, less-than-truckload brokerage and managed transportation.

The former Pacer intermodal operations are part of the XPO, Inc. freight brokerage business segment.