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NY - Investment firm FMR LLC, the parent of Fidelity Management & Research Co., has added to its stake in Discovery Communications and now controls 18.2 percent of the cable networks company's Class A stock, according to a Monday regulatory filing.our editor recommendsDiscovery Communications CEO David Zaslav Urges Patience For OWN LaunchLowe's Under Fire for Pulling 'All-American Muslim' Ads The filing showed that the Boston-based firm owned 25,699,140 shares of Class A stock, or 18.209 percent. An older filing shows that FMR held 24.5 million shares of Discovery, led by CEO David Zaslav, as of Sept. 30. The purchase of more stock is typically seen as a sign that an investor sees upside in a stock. As is common practice in these cases, a Discovery spokeswoman declined comment. In October, FMR slashed its stake in AOL to less than 5 percent after raising it to 10.32 percent in July. The investment company also owns stock in the likes of the Walt Disney Co., Time Warner, Comcast, DirecTV, Apple, Google and Amazon.com, among others. Email: Georg.Szalai@thr.com Twitter: @georgszalai Related Topics Discovery Communications