After-Hours Buzz: AAPL, NFLX & More

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

Apple - The iPhone maker posted earnings of $13.81 a share on revenue of $54.51 billion. Analysts expected the company to post earnings of $13.47 a share on revenue of $54.73 billion. Shares tumbled in extended-hours trading. The tech giant's stock has plunged nearly 30 percent from its all-time high of $705 last September.

In addition, Apple said it sold 47.8 million iPhones during the quarter, up from 37 million a year ago; 22.9 million iPads, up from 15.4 million a year ago; 4.1 million Macs, down from 5.2 million a year ago; 12.7 million iPods, down from 15.4 million a year ago.

Major Apple suppliers including Broadcom, Skyworks and Qualcomm also declined in extended-hours trading.

(Read More: Stocks Log 4-Day Gain, S&P Ends Near 1500)

Netflix - The online movie-streaming company posted a profit of 13 cents a share on revenue of $945 million, blowing past expectations for a loss of 13 cents a share on revenue of $934 million. In addition, the company handed in current-quarter earnings and revenue guidance that topped estimates. Shares skyrocketed in extended-hours trading.

Amgen - The biopharmaceutical company posted earnings of $1.40 a share, excluding one-time items, on revenue of $4.42 billion, edging past expectations for $1.38 a share on sales of $4.37 billion. In addition, the company handed in full-year earnings and revenue guidance that beat projections, sending shares higher in extended-hours trading.

F5 Networks - The networking appliances company posted earnings of $1.14, excluding one-times, on revenue of $365 million, missing expectations for $1.15 a share on sales of $367 million. Meanwhile, the company handed in a current-quarter earnings outlook that topped Wall Street estimates, sending shares higher in extended-hours trading.

Sandisk - The data storage solutions company posted earnings of $1.05 a share, excluding one-time items, on revenue of $1.54 billion, beating expectations for 76 cents a share on sales of $1.53 billion. But the company handed in current-quarter revenue guidance that missed expectations, sending shares lower in extended-hours trading.

Western Digital - The computer hard disk drive manufacturer posted earnings of $2.09 a share, excluding one-time items, on revenue of $3.82 billion, beating estimates for $1.82 a share on revenue of $3.68 billion.

Altera - The tech company posted earnings of 37 cents a share on revenue of $439 million, missing expectations for 39 cents a share on sales of $451 million. Shares declined in extended-hours trading.

Stryker - The medical equipment firm posted earnings of $1.14 a share, excluding one-time items, on sales of $2.3 billion, edging past expectations for $1.12 a share on revenue of $2.27 billion. In addition, the company handed in full-year 2013 earnings guidance that was in the higher end of estimates. Shares were largely unchanged in extended-hours trading.

Varian - The medical devices maker posted earnings of 86 cents a share, excluding one-time items, on revenue of $678 million, falling slightly short of expectations for 87 cents a share on sales of $676 million, In addition, the company handed in current-quarter and full-year earnings guidance that missed estimates, sending shares lower in extended-hours trading.

Lam Research - The semiconductor company posted earnings of 45 cents a share, excluding one-time items, on revenue of $861 million, beating expectations for 44 cents a share on revenue of $848 million. In addition, the company announced that CFO Ernest Maddock will resign in April. Shares declined in extended-hours trading.

Expedia - The travel website was initiated with a "buy" rating at Ascendiant Capital Markets with a price target of $77.

Splunk - The software company was initiated with an "outperform" rating at BMO Capital with a price target of $39 a share. But shares fell in extended-hours trading.

—By CNBC's JeeYeon Park (Follow JeeYeon on Twitter: @JeeYeonParkCNBC)

Questions? Comments? Email us at [e-mail]