NEW YORK -- Stocks that moved substantially or traded heavily on Friday:
Activision Blizzard Inc., down $2.40 to $47.15
The videogame maker behind "Call of Duty" gave investors a weak profit forecast for the year.
Newel Brands Inc., up $1.98 to $16.63
The maker of Sharpie and Elmer's products beat Wall Street's first quarter earnings and revenue forecasts.
Weight Watchers International Inc., up $2.65 to $22.96
The weight-loss program operator's first quarter loss was much narrower than Wall Street had forecast.
Arista Networks Inc., down $32.44 to $278.41
The cloud networking company expects revenue in the current quarter to fall short of Wall Street forecasts.
Universal Display Corp., up $13.73 to $170.33
The maker of advanced LED screens for TVs and other products blew away Wall Street's first quarter earnings forecasts.
Stericycle Inc., down $5.24 to $52.01
The medical waste management company's first quarter profit and revenue fell far short of analysts' forecasts.
United States Steel Corp., up $2.49 to $16.88
The steel maker reported first quarter profit that surged past Wall Street forecasts.
Monster Beverage Corp., up $5.12 to $63.11
Sales of the energy drink company's signature beverage powered first quarter profit beyond Wall Street forecasts.