After-hours buzz: Amgen, Broadcom, Cree & more

Check out which companies are making headlines after the bell Tuesday:

Amgen - The pharmaceutical giant posted earnings of $1.94 a share, excluding one-time items, on revenue of $4.75 billion, breezing past expectations for $1.77 a share on sales of $4.60 billion. In addition, the company raised the lower-end of its earnings guidance in full-year by a nickel. Shares rallied in extended-hours trading.

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- The semiconductor company reported earnings of 76 cents a share, ex-items, on revenue of $2.15 billion, exceeding Wall Street expectations for 69 cents a share on sales of $2.13 billion. Still, shares tumbled in extended-hours trading.

Cree - The semiconductor LED materials manufacturer posted earnings of 39 cents a share, in line with expectations, while revenue missed estimates by $1 million at $391 million. Meanwhile, the company handed in current-quarter revenue guidance that disappointed Wall Street analysts, sending shares lower in extended-hours trading.

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Juniper Networks - The networking equipment manufacturer reported earnings of 33 cents a share on revenue of $1.19 billion, edging past forecasts for 31 cents a share on sales of $1.17 billion. But the company handed in current-quarter revenue guidance that fell slightly short of estimates, sending shares lower in extended-hours trading.

Panera Bread - The fast-casual restaurant chain reported earnings of $1.48 a share, excluding one-time items, on revenue of $572 million, versus estimates for $1.35 a share on sales of $584 million. In addition, the company lowered its current-quarter earnings guidance. Shares slid in extended-hours trading.

Apollo Group - The for-profit education company reported earnings of 55 cents a share, excluding-items, on revenue of $845 million blowing past expectations for 25 cents a share on sales of $824 million. Shares jumped in extended-hours trading.

iRobot - The technology company posted earnings of 26 cents a share on sales of $125 million, versus expectations for 24 cents a share on sales of $127 million. The company meanwhile handed in weaker-than-expected current-quarter guidance, sending shares sharply lower in extended-hours trading.

Unisys - The IT services company posted a loss of 26 cents a share on revenue of $792 million, sharply missing forecasts for a gain of 40 cents a share on sales of $854 million. Shares plunged in extended-hours trading.

Waste Connections - The company increased its quarterly dividend by 15 percent to 11.5 cents a share from 10 cents a share. Shares were unchanged in extended-hours trading.

(All earnings estimates are via Thomson Reuters.)

—By CNBC's JeeYeon Park (Follow JeeYeon on Twitter: @JeeYeonParkCNBC)

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