Hologic (HOLX) had the highest return in January 2005 by a US stock with a market cap of $10B+, returning 26.9%.

ASSET	MONTH	% RETURN
Hologic (HOLX)	January 2005	26.87%
Clean Harbors (CLH)	January 2005	23.95%
MicroStrategy (MSTR)	January 2005	20.26%
Apple (AAPL)	January 2005	18.71%
Cheniere Energy (LNG)	January 2005	18.42%
Centene (CNC)	January 2005	17.31%
Valero Energy (VLO)	January 2005	14.91%
Humana (HUM)	January 2005	14.77%
Rockwell Automation (ROK)	January 2005	14.7%
Pilgrims Pride (PPC)	January 2005	14.7%
Ryanair Holdings PLC ADR (RYAAY)	January 2005	14.19%
Toll Brothers (TOL)	January 2005	13.8%
Shinhan Financial (SHG)	January 2005	13%
Skechers (SKX)	January 2005	12.69%
Credicorp (BAP)	January 2005	11.88%
Constellation Brands Inc Class A (STZ)	January 2005	11.61%
Sarepta Therapeutics (SRPT)	January 2005	10.04%
McKesson (MCK)	January 2005	9.81%
Coca-Cola Femsa SAB de CV ADR (KOF)	January 2005	9.41%
Monster Beverage (MNST)	January 2005	9.37%
Texas Roadhouse (TXRH)	January 2005	8.54%
Enterprise Products Partners (EPD)	January 2005	8.26%
Ferguson (FERG)	January 2005	8.26%
Cooper Companies, Inc Common Stock (COO)	January 2005	8.1%
KB Financial (KB)	January 2005	7.96%