Shares in Red Robin Gourmet Burgers Inc. were up substantially in early Wednesday trading after the company announced better-than-expected first-quarter results.

The Greenwood Village-based restaurant chain reported first-quarter net income of $11.6 million, or 89 cents per share, and revenue of $418.6 million.

Analysts were expected earnings of only 57 cents per share and revenue of $416 million.

Shares in Red Robin (Nasdaq: RRGB) were up more than 18 percent in early Wednesday trading, rising $11 to $69.

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