best performing mid cap stock between dec 2013 and sep 2014

Plug Power (PLUG) had the highest return between December 1, 2013 and September 30, 2014 by a mid-cap US stock, returning 512%.

ASSETDATE% RETURN
Plug Power (PLUG)
12/1/2013 - 9/30/2014
512%
Green Brick Partners (GRBK)
12/1/2013 - 9/30/2014
379.34%
RadNet (RDNT)
12/1/2013 - 9/30/2014
227.72%
Century Aluminum (CENX)
12/1/2013 - 9/30/2014
189.84%
PTC Therapeutics (PTCT)
12/1/2013 - 9/30/2014
179.43%
Applied Digital (APLD)
12/1/2013 - 9/30/2014
165.22%
TG Therapeutics (TGTX)
12/1/2013 - 9/30/2014
142.5%
Vipshop (VIPS)
12/1/2013 - 9/30/2014
127.61%
Element Solutions (ESI)
12/1/2013 - 9/30/2014
108.5%
Enphase Energy (ENPH)
12/1/2013 - 9/30/2014
105.62%
Leonardo DRS, Inc Common Stock (DRS)
12/1/2013 - 9/30/2014
91.02%
Golar LNG (GLNG)
12/1/2013 - 9/30/2014
90.18%
Pilgrims Pride (PPC)
12/1/2013 - 9/30/2014
86.34%
Silicon Motion Technology (SIMO)
12/1/2013 - 9/30/2014
85.28%
CleanSpark (CLSK)
12/1/2013 - 9/30/2014
83.33%
Sibanye Gold Ltd ADR (SBSW)
12/1/2013 - 9/30/2014
82.05%
Trinity Industries (TRN)
12/1/2013 - 9/30/2014
81.29%
TAL Education (TAL)
12/1/2013 - 9/30/2014
77.9%
Arrowhead Pharmaceuticals (ARWR)
12/1/2013 - 9/30/2014
77.1%
Ambarella (AMBA)
12/1/2013 - 9/30/2014
76.09%
MakeMyTrip (MMYT)
12/1/2013 - 9/30/2014
73.94%
Under Armour Inc A (UAA)
12/1/2013 - 9/30/2014
70.34%
Cal-Maine Foods (CALM)
12/1/2013 - 9/30/2014
65.87%
Pampa Energia SA ADR (PAM)
12/1/2013 - 9/30/2014
59.26%
BlackBerry (BB)
12/1/2013 - 9/30/2014
57.03%
Mid-cap stocks are treated as having a market cap between $2B and $10B.