Check out the companies making headlines after the bell Tuesday:
H&R Block shares jumped about 7 percent after the tax service provider announced a $3.5 billion share repurchasing program and posted a narrower-than-expected loss.
Ambarella, which develops chip processing solutions, reported adjusted earnings of 88 cents a share on $84 million in revenue, beating estimates of 80 cents a share on $82 million in sales. The stock was down about 2 percent after hours.
Amgen shares inched higher after the biotech firm said it would help to develop Novartis' pipeline of Alzheimer's Disease drugs.
Beverage maker Anheuser-Busch InBev indicated that the growth of craft beer has seen a slowdown in recent months, according to analysts attending the company's investor conference in China on Tuesday. The craft beer segment has been a bright spot in the U.S. beer market. Shares were down more than 1 percent in extended trading.
Guidewire Software's shares tumbled 6 percent after it reported fourth-quarter and fiscal 2015 results.