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Investors were sorting through yet another stack of earnings report after the bell Monday, and among the winners was

Advanced Analogic Technologies

( AATI).

The Sunnyvale, Calif.-based chipmaker climbed 7.5% after it swung to a third-quarter profit of $2.6 million, or a nickel a share, from a year-ago loss of 3 cents a share. That's at least 3 cents a share above prior company guidance. Revenue shot up 52.2% to $30.6 million, exceeding prior guidance and beating analysts' estimates by roughly $3 million, per Thomson Financial. Shares were trading up 82 cents to $11.80.

Also riding high after the bell was

CF Industries

(CF) - Get Free Report

, a maker of nitrogen and phosphate fertilizer products. Shares jumped 12.7% to $99.21 after the Deerfield, Ill., company careened past Street targets with third-quarter earnings of $86.5 million, or $1.52 a share, on revenue of $582.9 million.

The consensus called for income of 97 cents a share and sales of $536.9 million.

And restaurant-chain operator

Texas Roadhouse

(TXRH) - Get Free Report

bounced after posting a third-quarter profit of 14 cents a share, 16.7% higher than last year, on soaring sales of $189.5 million. Analysts had expected earnings of 13 cents a share, less special items, on revenue of $189.2 million. Shares of the Louisville, Ky., company were climbing $1.17, or 10.9%, to $11.95.

On the flip side,

Secure Computing

( SCUR) surrendered 12.8% after pegging fourth-quarter non-GAAP income at between 9 cents and 11 cents a share, a range that leans to the lower end of consensus. The company sees revenue of between $67 million and $69 million, which would miss the $73.1 million average projection.

Non-GAAP third-quarter income totaled 9 cents a share to beat estimates by 2 cents. Still, shares of the California-based computer security products maker were sinking $1.32 to $9.01.

Portfolio Recovery Associates

(PRAA) - Get Free Report

was also falling on disappointing results. The Norfolk, Va.-based firm made $11.7 million, or 75 cents a share, including 4 cents a share in extra interest expenses from its debt purchasing activity and capital structure optimization plan. Revenue totaled $54.6 million. The Street had called for 80 cents a share on $56 million in revenue.

Shares of the company, which buys and manages portfolios of defaulted consumer debt, was losing $4.40, or 9.3%, to $42.80.