Here is a list of the some the "reddest" companies, found on the "buy blue" website. The percentages shows the amount contributed to democrats. Subtract the numbers below from 100 and you get the percentage given to Republicans.
Go Best Buy! :)
Best Buy Co., Inc. 0% to democrats
Cintas Corporation 0%
Dollar General Corporation 0%
Fruit of the Loom 0%
Lowe's Companies, Inc. 0%
Outback Steakhouse, Inc. 2%
CBRL Group, Inc. 4%
Geico 5%
Darden Restaurants, Inc. 9%
Circuit City Stores, Inc. 10%
Saks Incorporated 11%
J. C. Penney Company, Inc. 12%
Kroger Co. 12%
Hallmark Cards, Inc. 14%
Adolph Coors Company 16%
Brinker International, Inc. 16%
Limited Brands, Inc. 16%
Marriott International, Inc. 17%
Shell Oil Company 17%
Target Corporation 17%
Southwest Airlines Co. 18%
YUM! Brands, Inc. 21%
May Department Stores Company 22%
Continental Airlines, Inc. 25%
InterContinental Hotels Group PLC 25%
Guess?, Inc 27%
Safeway Inc. 30%
Sears, Roebuck and Co. 34%
Walgreen Co. 35%
Amazon.com, Inc. 41%
Delta Air Lines, Inc. 43%