Benzinga's Top #PreMarket Gainers

Sigma-Aldrich

shares jumped 34.41% to $137.60 after Germany's Merck KGaA

announced its plans to acquire Sigma-Aldrich for $140 per share in cash. TAT Technologies

shares surged 5.33% to $8.10 in pre-market trading after the company reported that its subsidiary, Piedmont Aviation Component Services, has signed a seven year landing gear Maintenance Support Agreement with Republic Airways Holdings. Best Buy Co

shares climbed 4.71% to $36.24 in pre-market trading after falling 1.00% on Friday. The Clorox Company

shares surged 2.63% to $92.95 in pre-market trading after rising 0.75% on Friday.