Shares of Placer Sierra Bancshares ( PLSB) were among the Nasdaq's winners Wednesday, jumping 16% after the banking company agreed to be acquired by Wells Fargo ( WFC) for about $645 million in stock. The deal price assumes a Wells Fargo measurement price of between $32.58 and $39.82. The exchange ratio will then be determined by dividing $28 by the measurement price. If the measurement price is less than $32.58 a share, then the exchange ratio will be 0.8595 shares. The transaction is expected to close by midyear. Shares of Placer Sierra recently were up $3.73 to $27.26. Shares of Wells Fargo were trading at $35.41, down 18 cents. Alcoa ( AA) climbed 4% after the aluminum producer's fourth-quarter results topped expectations. The company posted adjusted earnings of $644 million, or 74 cents a share, on revenue of $7.84 billion. Analysts expected earnings of 65 cents a share and revenue of $7.63 billion. A year earlier, Alcoa earned $224 million, or 26 cents a share, on revenue of $6.54 billion. Shares were trading up $1.25 to $29.77. Shares of Eastman Kodak ( EK) rose modestly after the photography products giant agreed to sell its health-imaging business to Onex Healthcare Holdings for up to $2.55 billion. Under the terms of the deal, Kodak will receive $2.35 billion in cash at closing, plus an additional $200 million in future payments if Onex achieves certain targets with its investment. The sale is expected to close during the first half of 2007. Shares of Kodak were up 15 cents to $25.78.