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After-hours buzz: WFC, CSX, AET & more

NYSE after hours
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Check out which companies are making headlines after the bell on Wednesday:

Wells Fargo shares spiked 2 percent immediately after the bank announced chairman and CEO John Stumpf will retire. Wells Fargo President and COO Tim Sloan will take over as CEO of the embattled bank.

Stumpf said he is optimistic for the bank's future and is grateful for the opportunity to have led Wells Fargo. "I have decided it is best for the Company that I step aside," he said in a statement. "I know no better individual to lead this company forward than Tim Sloan."

Shares of CSX Corporation jumped more than 3 percent in after-hours trade Wednesday. The transportation services company reported quarterly earnings of 48 cents per share on revenue of $2.71 billion. The company's report beat analyst estimates of 45 cents EPS on revenue of $2.69 billion.

Aetna shares jumped nearly 1 percent after the bell. The health insurance company earned high Medicare star quality ratings, with 91 percent of Medicare advantage members on 4-star (or better) Medicare Advantage Prescription Drug plans. Aetna will be entering 134 new counties nationwide in 2017. The health care company finished the day down 1.52 percent, trading at $110.37.

Humana saw its stock spike more than 5 percent after the market closed, following a 9 percent slide during the day. The Centers for Medicare and Medicaid Services showed that Humana members in 4-star (or higher) plans declined to 37 percent from 78 percent in the prior year. The company said the results do not fully reflect its focus on quality care for its Medicare members.