No significant talks are taking place between Charter and Verizon, sources told CNBC on Thursday.

Earlier, shares of Charter surged more than 9 percent after a report claimed Verizon is exploring a combination with the company. The stock still ended the day 7 percent lower, while Verizon shares fell 1 percent.

There was speculation earlier that talks could be in the very early days.



Charter said it has no comment on the report. Verizon declined to comment.