Let's check out the Yahoo Finance charts of the day.
Merck (MRK): Shares are down in early trade, around 1.1%. The drugmaker beat estimates by 5 cents a share. Revenue was very slightly below forecasts. Merck's results were powered by strong growth in sales of its cancer drug Keytruda.
Under Armour (UA): Shares down here, around 5.3%. The athletic apparel maker reported a break-even quarter on an adjusted basis, compared to analysts forecasts of a 5 cents per share loss. Revenue beat forecasts, helped by stronger international sales.
NutriSystem (NTRI): Shares moving up here, around 18.3%. The diet plan provider earned 9 cents per share for its latest quarter, beating forecasts by 3 cents a share. They also saw revenue come in above estimates and raised its full-year forecast.
For more on today's big stock movers check out the Final Round, live at 3:55 p.m. ET, right here on Yahoo Finance.