(Reuters) – U.S. health insurer Cigna Group has revived efforts to merge with smaller rival Humana after abandoning the pursuit late last 12 months, Bloomberg News reported on Friday, citing people aware of the matter.

The businesses have held informal, early discussions recently a few potential deal, the report said.

Shares of Humana were up about 5% in after-hours trading on Friday, while those of Cigna were down about 4%.

Last 12 months, Reuters reported that Cigna ended its try and negotiate an acquisition of Humana after the pair did not agree on a price and announced a $10 billion price of shares buyback.

By the point the deal talks ended, sources had told Reuters that there was still a possibility of a tie-up in the longer term.

Cigna struck a $3.3 billion cope with insurer Health Care Service Corp earlier this 12 months to sell its Medicare business that manages government-backed medical health insurance for people aged 65 and older.

Should a merger between Cigna and Humana occur, it could create an organization with a worth nearing $130 billion, based on their market values.

Humana has lost nearly 40% of its value this 12 months because it has been fighting declining enrollments in its top-rated Medicare insurance coverage and elevated costs resulting from higher demand for medical care.

Cigna and Humana declined to comment.

(This story has been refiled to repair a typo in paragraph 7)

(Reporting by Mariam Sunny in Bengaluru; Editing by Alan Barona)