Tower Semiconductor (TSEM) had the highest return in July 2009 by a large-cap US stock, returning 68.6%.

ASSET	MONTH	% RETURN
Tower Semiconductor (TSEM)	July 2009	68.57%
Teck Resources Ltd Class B (TECK)	July 2009	61.69%
Incyte (INCY)	July 2009	60.99%
Modine Manufacturing (MOD)	July 2009	60.38%
Jazz Pharmaceuticals (JAZZ)	July 2009	57.22%
Masco (MAS)	July 2009	45.52%
MKS Instruments (MKSI)	July 2009	45.31%
New York Times (NYT)	July 2009	42.31%
Capital One Financial (COF)	July 2009	39.48%
Sanmina (SANM)	July 2009	38.6%
Tenet Healthcare (THC)	July 2009	38.6%
Onto Innovation (ONTO)	July 2009	38.01%
Hartford Financial Services (HIG)	July 2009	37.99%
Intuitive Surgical (ISRG)	July 2009	37.77%
Manulife Financial (MFC)	July 2009	37.73%
Textron (TXT)	July 2009	37.28%
Woori Financial (WF)	July 2009	37.15%
Expedia (EXPE)	July 2009	36.79%
Corcept Therapeutics (CORT)	July 2009	36.14%
Trane Technologies (TT)	July 2009	35.91%
Entegris (ENTG)	July 2009	34.66%
East West Bancorp (EWBC)	July 2009	34.14%
Lululemon Athletica (LULU)	July 2009	33.84%
Advanced Energy Industries (AEIS)	July 2009	33.82%
Caterpillar (CAT)	July 2009	33.25%

Large-cap stocks are treated as having a market cap of $10B+.