Tuesday's Late Winners & Losers

Extended trading picked up where the regular session left off Tuesday, producing a fairly even mix of winners and losers.

Yahoo! (YHOO Quote) was one of the most heavily traded names after hours, dropping more than 7% after posting $1.18 billion in first-quarter revenue, missing targets by $24.9 million, according to Thomson Financial. Shares of the Sunnyvale, Calif., search-engine operator recently lost $2.29 to $29.80.

Other tech names were on the downswing, as well. Disk-drive maker Seagate Technology (STX Quote) slumped 5.2% to $21 after fiscal third-quarter earnings slid to $274 million, or 47 cents a share (excluding items) -- 4 cents short of per-share estimates. Santa Ana, Calif.'s MSC Software (MSCS Quote), for its part, expects a first-quarter sales decline year over year under Wall Street estimates. Shares were off 67 cents, or 5%, to $12.85.

Salt Lake City-based Usana Health Sciences (USNA Quote), which makes nutritional and personal-care products, erased regular-session gains after slashing 2007 profits to lean toward the lower end of the consensus -- a range of $2.55 to $2.60 a share, compared with $2.57 to $2.64 previously. The deflated sales range, at $422.8 million to $430.3 million, is at least $3 million below Street expectations. Shares were down $1.29, or 3%, to $41.53.

Leading the winning side post-bell was Linear Technology (LLTC Quote), shares of which jumped 9.6% to $35.20 in furious trading on word it will buy back about $3 billion worth of its shares. Michigan-based pizza chain Domino's (DPZ Quote) declared a special dividend of $13.50 a share, spurring shares higher by $7.4% to $35.99.

Introgen Therapeutics (INGN Quote) surged 18% to $6.09 on positive early-phase results for INGN 401, its proposed treatment for lung cancer. And Washington Mutual (WM Quote), the Seattle-based savings bank, added 2.5% to $41.15 after reporting first-quarter income of 86 cents a share, skidding past analysts' 83-cent targets.