As Honeywell’s largest active investor, Elliott Investment Management’s letter to Honeywell International argued that Honeywell should split into two entities—Honeywell Aerospace and Honeywell Automation.

The fund, which often seeks changes to strategy or corporate structure, believes that Honeywell should break apart into two companies, one serving the aerospace market and another

The push comes as new Honeywell CEO Vimal Kapur has led an aggressive repositioning with mergers, acquisitions and spinoffs.