Cigna really isn't an acquisition candidate. The market capitalization of the company is $70 billion+ - this is the price to buy all the stock in the company at current prices. The company also owes over $30 billion in debt and has $6 billion in cash, so you're talking $100 billion. That's a huge check. There hasn't been an acquisition this size in years: Vodafone buying Mannesmann in 1999 was $183 billion, and the crazy AOL Time Warner deal was $182 million. Gaz de France bought Suez SA for $107 billion in 2007 (both companies in France), Verizon - Vodafone was $176 billion in 2013 and Dow-Dupont was $173 billion in 2015, and there were a few others in the late 2015-2020 period (Praxair, Time Warner, TW Cable, Kraft, SAB Miller, Raytheon). But that's it. Like 12 deals, and most of them were specialty situations involving complex mergers. The health insurance industry is heavily regulated, and anti-trust probably wouldn't allow it (Trump's white house maybe, but you don't know who will be next).
Cigna could sell off divisions, but the divisions at Cigna are all pretty integrated together, and it's likely harder to sell certain assets than you might think. But they could sell parts of Evernorth I guess. But there are certain regulations that incent keeping a lot of this stuff under one roof so you don't run into MLR barriers as easily.
So I wouldn't hold out for a sale or worry about a sale. There's no real likely buyer. United Healthcare is having huge problems - way larger - so they aren't a buyer. Aetna is wrapped into CVS and no way they could keep Caremark and Express scripts under one roof - even the current FTC/DoJ would not allow that. Way too much centralization in the PBM space. I don't see a foreign insurance company wanting to buy into the US market at this point with Cigna. There's not going to be a PE consortium that buys this either - it's too big, too complex, too prone to regulatory headwinds, and it'd be very hard for them to exit unless they ipo it. Now a corporate raider could come on by and agitate for board seats and so on - haven't had one of those in a while - but again, not sure how much upside there is, and again, it's the massive market cap that sort of protects the company. It's huge.
I left Evernorth last summer - no regrets! Got a new gig outside of the healthcare industry.