Stocks to Watch: ZNGA, AAPL, FIVE & More

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

Zynga - The social game services provider announced that its chief marketing officer Jeff Karp has left the company. The announcement comes about a month after COO John Schappert's departure from the struggling social media company. Shares fell in extended-hours trading and have tumbled more than 70 percent year to date. (Click here for after-hours quote.)

Apple - The tech giant continued to trade lower in extended-hours trading after tumbling more than 2 percent in the regular session. Shares briefly hit an all-time high of $683.29 a share near the market open before pulling back. The company is expected to unveil the iPhone 5 on Wednesday. (Click here for after-hours quote.)

Yelp - The user review website was initiated with a "neutral" rating and a $26 price target at Piper Jaffray. (Click here for after-hours quote.)

Five Below - The discount retailer posted earnings of 4 cents a share, excluding one-time items, on revenue of $87 million. Analysts expected the company to post earnings of 1 cents a share on sales of $82 million.Meanwhile, the company handed in a full-year guidance that topped expectations while providing current-quarter earnings and revenue outlook that were mostly in line with estimates. But shares traded sharply lower in extended-hours trading. (Click here for after-hours quote.)

Casey's General Stores - The convenience-store chain posted earnings of $1.01 a share on revenue of $1.87 billion. Analysts expected the company to post a profit of 95 cents a share on sales of $1.93 billion. Shares edged slightly higher in extended-hours trading. (Click here for after-hours quote.)

Shuffle Master - The casino-product manufacturer posted earnings of 18 cents a share on sales of $63 million, missing expectations for 20 cents a share on revenue of $68 million. Shares tumbled in extended-hours trading. (Click here for after-hours quote.)

Life Technologies - The biotech company was initiated with a "buy" rating and a price target of $57 at WallachBeth Capital. Shares edged higher in extended-hours trading. (Click here for after-hours quote.)

CBL & Associates - The real estate investment trust announced Farzana Mitchell has succeeded John Foy as CFO. (Click here for after-hours quote.)

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

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