Embattled Twitter CEO Dick Costolo will step down next year, SunTrust's Bob Peck said.
Here's how much Apple is now charging for the iPhone in Russia.
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Matt Hunter is the senior technology editor at CNBC.com.
Cadie Thompson is a tech reporter for the Enterprise Team for CNBC.com.
Josh Lipton is CNBC's technology correspondent, working from CNBC's Silicon Valley bureau.
Facebook looks to carry its current momentum into 2015 while competing other social media networks.
"2016 is where it gets more exciting," Piper Jaffray's Gene Munster says. Here's why.