Updated from 7:01 a.m. EDT

Companies are continuing to increase the dividends of their stocks, and Stockpickr has put together another portfolio of the Top Dividend-Raisers for the Week. This week's list includes a few food-related stocks and a couple of transportation-oriented plays.

One of the stocks with a big dividend increase is Tidewater ( TDW - Get Report), an operator of offshore marine service vessels, which increased its quarterly dividend by 67% to 25 cents per share. This is the company's first dividend increase since 1996. Tidewater, which owns 460 vessels, has repurchased $516.2 million in shares since August 2005. The stock has a P/E of 11 and a PEG of 0.16, and it pays a yield of 1.5%.

Tidewater shows up in an interesting Stockpickr portfolio called Dividends+Growth. Other stocks in the portfolio include Costco Wholesale ( COST - Get Report), which pays a dividend of 0.9%; General Electric ( GE - Get Report), which yields 4%; and Lance ( LNCE), with a 3.1% yield.

Another stock with a big boost in dividends is Knight Transportation ( KNX), a provider of dry-van and temperature-controlled truckload carrier services. Knight increased its quarterly dividend by 33% to 4 cents per share. The company was recently upgraded by Wachovia from market perform to outperform. Knight has a P/E of 27 and a PEG of 1.68, and it pays a yield of 0.9%.

Knight is owned by Ruane Cunniff, which has over $14 billion in assets. The firm's trademark Sequoia Fund has had an average annual return of 15.68% from 1970 through June 2006. Ruane Cunniff also owns Martin Marietta Materials ( MLM), which yields 1.2%; TJX ( TJX - Get Report) (TJX), with a 1.4% dividend; and Fastenal ( FAST), with a 1% dividend yield.

Flowers Foods ( FLO) is another company that raised its dividend, boosting it by 20% to 15 cents per share per quarter. This bakery-products company recently reported that its first-quarter profit rose 26%, outperforming Wall Street's expectations. The stock has a P/E of 27, a PEG of 2.17 and a yield of 1.8%.

Flowers is favored by John Keeley, president and manager of Keeley Asset Management. Founded in 1982, it has $3.5 billion under management. Keeley also likes Walter Industries ( WLT), which yields 0.2%; Bucyrus International ( BUCY), with a yield of 0.1%; and Foundation Coal Holdings ( FCL), which yields 0.3%.

For more companies that have raised their dividends, check out the Top Dividend-Raisers for the Week portfolio at Stockpickr.com.

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