Tech Five: Yahoo rising off report of sale

Big changes may be in store for media company Yahoo, while cloud storage company Box prepares quarterly earnings after the bell Wednesday.

Let's look at tech stocks to watch:

Yahoo. Shares are up nearly 4% in pre-market trading off a report the company's board will meet to discuss a possible sale of its Internet properties. Yahoo has received pressure from activist investor firm Starboard to cancel the spinoff of its stake in Alibaba and instead sell off its Internet business.

Twitter. Co-founder Evan Williams sold off shares of the social media company, giving the proceeds to a family foundation, according to a recent SEC filing. Williams still holds a 7% stake in the company worth $1 billion.

Facebook. CEO Mark Zuckerberg and wife Dr. Priscilla Chan say they will give away 99% of their Facebook shares -- worth $45 billion -- during their lifetime. The donation was revealed in a letter written to their newborn daughter, Max, and revealed Tuesday.

Box. The cloud storage company reports third quarter earnings after the markets close. Forecasts call for a loss of 31 cents a share off $76 million in revenue.

Samsung. The electronics giant launched a Web browser built for use with its Gear VR virtual reality headset. The browser supports voice recognition, an on-screen keyboard and a Gaze mode so users can select menus by looking at them.

Follow Brett Molina on Twitter: @brettmolina23.