Check out which companies are making headlines after the bell Tuesday:
MasterCard The payment processor announced a 10-for-1 stock split and increased its quarterly dividend 83 percent to $1.10 a share. The company also announced a $3.5 billion stock-repurchase program. Its shares surged in after-hours trading.
Lab Corp. The clinical-testing provider's shares dropped in after-hours trading after it projected 2014 revenue in line with estimates but earnings-per-share below expectations.