By Greg Roumeliotis
(Reuters) - U.S health insurer AETNA (AET.NY)Inc
One of the people said Aetna's offer would value Humana at about $230 per share and could be announced as early as Friday.
The offer, if it goes through, would make it the largest deal in the insurance industry since Anthem Inc
Anthem last month said it is pursuing Cigna Corp
The $230 per share offer is at a premium of nearly 23 percent to Humana's close on the New York Stock Exchange on Thursday.
(Reporting by Rosmi Shaji and Aurindom Mukherjee in Bengaluru; Editing by Ken Wills)