Regeneron Pharmaceuticals (REGN) had the highest return between February 1, 2011 and January 31, 2012 by a large-cap US stock, returning 169.7%.

ASSET	DATE	% RETURN
Regeneron Pharmaceuticals (REGN)	2/1/2011 - 1/31/2012	169.69%
Ulta Beauty (ULTA)	2/1/2011 - 1/31/2012	105.26%
Domino's Pizza Inc Common Stock (DPZ)	2/1/2011 - 1/31/2012	97.88%
Monster Beverage (MNST)	2/1/2011 - 1/31/2012	83.48%
Lululemon Athletica (LULU)	2/1/2011 - 1/31/2012	81.46%
Biogen (BIIB)	2/1/2011 - 1/31/2012	74.1%
Cheniere Energy (LNG)	2/1/2011 - 1/31/2012	70.99%
Tyler Technologies (TYL)	2/1/2011 - 1/31/2012	68.41%
Chipotle Mexican Grill (CMG)	2/1/2011 - 1/31/2012	67%
Dollar Tree (DLTR)	2/1/2011 - 1/31/2012	66.54%
Fastenal (FAST)	2/1/2011 - 1/31/2012	63.67%
Royal Gold (RGLD)	2/1/2011 - 1/31/2012	63.6%
Centene (CNC)	2/1/2011 - 1/31/2012	62.82%
Franco-Nevada (FNV)	2/1/2011 - 1/31/2012	62.71%
Tractor Supply (TSCO)	2/1/2011 - 1/31/2012	58.47%
Ross Stores (ROST)	2/1/2011 - 1/31/2012	57.09%
Seagate Technology (STX)	2/1/2011 - 1/31/2012	55.6%
Mastercard (MA)	2/1/2011 - 1/31/2012	54.69%
Humana (HUM)	2/1/2011 - 1/31/2012	54.03%
Contura Energy (CTRA)	2/1/2011 - 1/31/2012	52.6%
Dollar General (DG)	2/1/2011 - 1/31/2012	52.23%
Somnigroup International (SGI)	2/1/2011 - 1/31/2012	51.75%
Starbucks (SBUX)	2/1/2011 - 1/31/2012	50.88%
Westlake Chemical (WLK)	2/1/2011 - 1/31/2012	50.61%
Molina Healthcare (MOH)	2/1/2011 - 1/31/2012	49.03%

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