Alnylam Pharmaceuticals (ALNY) had the highest return in July 2007 by a large-cap US stock, returning 57.7%.

ASSET	MONTH	% RETURN
Alnylam Pharmaceuticals (ALNY)	July 2007	57.68%
Intuitive Surgical (ISRG)	July 2007	52.96%
Kratos Defense & Security Solutions (KTOS)	July 2007	28.9%
Lululemon Athletica (LULU)	July 2007	28.56%
First Solar (FSLR)	July 2007	25.99%
Alamos Gold (AGI)	July 2007	20.31%
Somnigroup International (SGI)	July 2007	19.26%
Southern Copper (SCCO)	July 2007	17.53%
Baidu (BIDU)	July 2007	16.79%
Cummins (CMI)	July 2007	16.13%
Wheaton Precious Metals (WPM)	July 2007	15.5%
POSCO (PKX)	July 2007	15.45%
TechnipFMC (FTI)	July 2007	14.61%
Agnico Eagle Mines (AEM)	July 2007	14.57%
Amazon (AMZN)	July 2007	14.14%
Vertex Pharmaceuticals (VRTX)	July 2007	12.98%
Garmin (GRMN)	July 2007	12.92%
Telkom Indonesia (Persero) Tbk PT ADR Rep 100 B (TLK)	July 2007	12.57%
Freeport-McMoran Copper & Gold (FCX)	July 2007	12.25%
Illumina (ILMN)	July 2007	12.24%
Las Vegas Sands (LVS)	July 2007	12.12%
Westinghouse Air Brake Technologies (WAB)	July 2007	12.01%
Lennox International (LII)	July 2007	11.89%
Lam Research (LRCX)	July 2007	11.88%
Shinhan Financial (SHG)	July 2007	11.15%

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