Longtime former Omnicom executive Ellen Cook has filed an age and gender discrimination lawsuit against the company, and its commerce agency TPN. 

Cook was the president of the holding company’s commerce agency The Integer Group for 16 years before being named CEO in 2020.  She became CEO of sibling agency TPN when it and The Integer Group merged in 2023.  

In her suit, Cook said she was fired in 2024 after complaining about pay disparities between her and several male peers at Omnicom, includingher predecessor at Integer Group Mike Sweeney.  

She alleged a 44% disparity between her compensation and Sweeney’s despite facing revenue headwinds which came from client losses under Sweeney’s watch. Cook said in the suit she was able to make up the losses and drive double digit revenue gains under her leadership. 

She said her firing was retaliatory after she complained about the pay disparity and followed up several times after the company failed to take remedial action.  

The suit was filed in the U.S. District Court for the Northern District of Texas earlier this week. 

The action cites several other lawsuits filed by senior Omnicom women executives in recent years that alsoalleged discriminatory behavior by the holding company.  

Cook is seekingliquidated and compensatory damages, reinstatement or “front pay” if reinstatement isn’tfeasible, attorneys' fees and other costs.