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United Rentals, Blackberry and Medtronic are the Yahoo Finance charts of the day.

Let's check out the Yahoo Finance charts of the day.

United Rentals (URI): Shares are up in early trade, at around 3.6%.  UBS upgraded the equipment rental company to "buy" from "neutral". UBS said cyclical and cost concerns surrounding the company are overdone.

Blackberry (BB): Shares down here, at 6.9%.  The software and services company saw revenue top estimates. Blackberry reported adjusted first-quarter profit of 3 cents per share, compared to analysts' expectations of a breakeven quarter.

Medtronic (MDT): Shares are up slightly here, at around .82%.  The medical device company said Friday its board has approved a 9% increase in its quarterly cash dividend to 50 cents a share.

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.