ExxonMobil has announced plans to lay off nearly 400 employees from Pioneer Natural Resources Co., after purchasing the Irving, Texas-based operator for $63 billion earlier this year. The company will cut 376 jobs,

ExxonMobil will lay off nearly 400 employees from Pioneer Natural Resources following its $63 billion acquisition.

A regulatory filing shows more than 90% of layoffs are at Pioneer’s former headquarters in Irving, Texas with the rest being workers in Midland.

Spring-based Exxon Mobil Corp. (NYSE: XOM) is laying off 397 Texas employees as a result of its $59.5 billion acquisition of Pioneer Natural Resources, the company said in a Worker Adjustment and Retraining Notification Act letter sent to the Texas Workforce Commission.