Check out the companies making headlines after the bell Wednesday:
Google missed earnings and revenue estimates as aggregate cost-per-clicks fell 7 percent, year-over-year. However, shares rose 3 percent in after-hours trading.
Microsoft topped Wall Street's forecasts on the top and bottom lines, boosted by strong growth in its hardware and cloud sectors. The stock rose more than 3 percent after the announcement.
Altera missed expectations on the top and bottom lines, sending shares tumbling about 5 percent. The chip maker reported first-quarter earnings of 31 cents a share, missing estimates by a penny. Meanwhile, revenue came in at $435 million, compared to forecasts for $471 million.
Music streaming provider Pandora reported a narrower-than-expected first-quarter loss of 12 cents a share on $231 million, which also beat estimates. However, shares fell as key user metrics missed projections.