Here's the company's news release:
https://investor.windstream.com/news/news-details/2019/Windstream-Reports-First-Quarter-2019-Results/default.aspx
Windstream has not yet filed its "10-Q" earnings report to the government so I'm not sure this is formally official but it's probably close.
Notice of late 10-Q filing:
https://d18rn0p25nwr6d.cloudfront.net/CIK-0001282266/8314eb89-05d6-4aef-9998-467a52d6f8c9.pdf