The top aftermarket NYSE gainers Tuesday were: Owens-Illinois, Och-Ziff Capital Management, Guidewire Software, Alcoa, Koninklijke Philips Electronics and Generac Holdings Inc. The top aftermarket NYSE losers were: Perini Corp, Computer Sciences Corp, Leapfrog Enterprises, QR Energy, Hospitality Properites Trust and Newcastle Investment Corp.

Gainers:

Owens-Illinois, Inc. (OI) shares climbed 9.04 percent to $24.00 in post market session. The company announced Tuesday that it expects a 35 percent rise in its first-quarter profit on good manufacturing performance and greater-than-planned production rates. The company posted a net profit of $0.50 per share in 2011.

Och-Ziff Capital Management Group LLC (OZM) shares climbed 5.93 percent to $9.65 in aftermarket session. The stock has a 52-week low of $7.32, a 52-week high of $16.50 and $3.77 billion in market capitalization.

Guidewire Software, Inc. (GWRE) shares surged 5.54 percent to $29.20 in aftermarket session. The company stock slumped more than 8 percent in regular session.

Alcoa Inc. (AA) shares surged 5.36 percent to $9.82 in post market session after posting unexpected profit for the first quarter. Its first quarter net profit declined to $94 million or $0.09 per share from $308 million or $0.27 per share in the same quarter last year, but topped analysts’ estimation of net loss of $0.04 per share.

Koninklijke Philips Electronics, N.V. (PHG) shares gained 5.06 percent to $18.89 in aftermarket session. The company stock plunged nearly 5 percent in regular session.

Generac Holdings Inc. (GNRC) shares surged 4.84 percent to $23.59 in aftermarket session. The stock has a 52-week low of $15.41, a 52-week high of $30.50 and $1.53 billion in market capitalization.

Losers:

Perini Corp. (TPC) shares plunged 4.98 percent to $13.92 in aftermarket session.

Computer Sciences Corp. (CSC) shares plunged 4.15 percent to $27.01 in post markets session after providing a preliminary and unaudited update for the fourth quarter and the full fiscal year 2012, ended March 30, 2012. The company currently expects fourth quarter adjusted net income to be in a range of $0.19 to $0.21 per share compared to analysts’’ estimation of $0.97 per share. CSC also expects fiscal 2012 net loss to be in a range of $2.45 to $2.49 per share against estimation of $4.30 per share.

Leapfrog Enterprises Inc. (LF) shares plunged 3.13 percent to $7.43 in post market trading after plunging more than 7 percent in regular trade.

QR Energy, LP (QRE) shares declined 1.62 percent to $18.80 in aftermarket session. The company announced that it has commenced an underwritten public offering of 6,202,263 common units representing limited partner interests in QRE pursuant to a registration statement on Form S-1 previously filed with the Securities and Exchange Commission.

Hospitality Properites Trust (HPT) shares declined 1.51 percent to $25.36 in post market session. The stock has a 52-week low of $19.00, a 52-week high of $26.99 and $3.18 billion in market capitalization.

Newcastle Investment Corp. (NCT) shares declined 1.34 percent to $5.90 in post market session.

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