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After-hours buzz: GOOGL, AMZN, CBS & more

Check out the companies making headlines after the bell on Thursday:

Alphabet, Google's parent company, beat analysts' expectations on Thursday, and its shares popped more than 5.5 percent after hours.

Alphabet reported second-quarter earnings of $8.42 per share on revenue of $21.50 billion. Analysts' expected Alphabet to report earnings of $8.04 per share on $20.76 billion, according to Thomson Reuters a consensus estimate.

CFO Ruth Porat said in a statement that the results "reflect the successful investments we've made over many years in rapidly expanding areas such as mobile and video."

Last year, Google's founders changed the company's structure, creating Alphabet as a holding company of sorts. Core Google generates most of the company's money, and a separate category called "other bets" includes projects like Google Fiber, Nest thermostats, science initiatives Calico and Verily and the investment arm Google Ventures.

Alphabet shares have fallen 1.56 percent so far this year.

Amazon.com beat analysts' expectations, and shares last popped more than 2 percent after hours.

Amazon.com reported second-quarter adjusted earnings of $1.78 per share on revenue of $30.40 billion. Analysts' expected Amazon to report earnings of $1.11 per share on $29.55 billion, according to Thomson Reuters a consensus estimate.

The beat marks the online retailer's fifth straight period of profitability. Amazon has invested to lower delivery costs and increase online media offerings to its members.

"Our big call out is the strong profitability of the North American retail business. At 6.6 percent [margins], you can't make the argument that this isn't a profitable business anymore," said Edward Yruma, an analyst at KeyBanc Capital Markets.

Sales from Amazon Web Services (AWS), its industry-leading cloud business, were $2.89 billion. The Street was expecting $2.83 billion.

Shares of Amazon.com have increased 11 percent so far this year.

CBS beat analysts expectations, but shares wavered in extended trading. CBS shares were last down 0.02 percent.

CBS reported second quarter earnings of 93 cents per share on revenue $3.29 billion. Analysts' expected CBS to report earnings of 86 cents per share on $3.21 billion, according to a Thomson Reuters consensus estimate.

The mass media company beat on the top and bottom, but advertising revenue declined 2.6 percent against analysts' expectations of ad revenue to be flat.

Looking forward to the third and fourth quarters, CBS expects to see increases in advertisement revenue as the presidential election approaches in the fall.

Shares of CBS have risen 15 percent so far this year.

Wynn Resorts beat analysts' expectations, but shares still dropped more than 5 percent after hours.

Wynn Resorts reported second-quarter adjusted earnings of $1.07 per share on revenue of $1.06 billion. Analysts' expected Wynn to report earnings of 91 cents per share on $1.02 billion, according to a Thomson Reuters consensus estimate.

The casino resort developer said that it expects to be allocated 100 tables for Wynn Palace, the company's project in Macau, China. This is well below the Street's expectation of 150 to 250 tables.

Table allocations are determined by Macau gaming authorities, that has reduced overall allocations to newer casinos.

Shares of Wynn Resorts have increased 51.26 percent so far this year.

-CNBC's Anita Balakrishnan, Christine Wang, and Krystina Gustafson contributed to this report.