Following a bitter battle with an activist investor, Southwest is pausing corporate hiring and most summer internships to cut costs and improve margins.

Southwest Airlines Co. is pausing hiring for management, headquarters jobs and outside workers in a new round of cost cuts following a fight with

Southwest Airlines says it's not filling some jobs and summer internships this year as the company looks to lower costs.

Southwest said that it will continue to evaluate its hiring needs on an ongoing basis to determine when it makes the most sense to restart hiring.

In September, the company slashed its flights from Atlanta, eliminating jobs, though staff were able to apply to work out of other bases.