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

Visa - The credit-card provider earned $1.56, ex-items, on revenue of $2.57 billion, topping estimates for $1.45 a share on revenue of $2.52 billion. Shares rallied in extended-hours trading. (Click here for after-hours quote.)

Zynga - The social-network gaming company posted earnings of a penny on revenue of $332, disappointing expectations for 5 cents a share on revenue of $344 million. The company also sharply lowered its outlook for 2012 to reflect game launch delays, sending shares plunging to all-time lows in extended-hours trading. Facebook shares also fell following the announcement. (Click here for after-hours quotes.)

Whole Foods - The upscale grocery store chain posted earnings of 63 cents a share, edging past expectations for 61 cents a share. Meanwhile, revenue was in line with estimates at $2.73 billion. In addition, the company raised its full-year earnings outlook, sending shares sharply higher in extended-hours trading. (Click here for after-hours quote.)

Akamai - The tech company posted earnings of 43 cents a share, excluding one-time items, on revenue of $331 million, topping estimates for 37 cents a share on revenue of $326 million. Shares surged in extended-hours trading. (Click here for after-hours quote.)

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