After-Hours Buzz: WTW, NYX, FB & More

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

Weight Watchers - David Burwick, president of company's North American division, will resign to become CEO of Peet's Coffee & Tea. (Click here for after-hours quote)

(Read More: Stocks End Flat in Thin Trading; FB Jumps 4%)

NYSE Euronext - The exchange said it is investigating issues that impacted processing and trade execution for 216 stocks earlier in the trading session. (Click here for after-hours quote)

Facebook - The social-networking giant edged higher in extended-hours trading after rallying more than 4 percent in the regular session. (Click here for after-hours quote)

Hologic - he medical products company posted earnings of 37 cents a share, excluding one-time items, matching expectations, while revenue edged past estimates. But the company handed in a current quarter and full-year profit guidance that was below forecasts, sending shares lower in extended-hours trading. (Click here for after-hours quote)

(Read More: CNBC's Market Insider Blog)

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

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