best performing mid cap stock between may 2012 and dec 2014

Vipshop (VIPS) had the highest return between May 1, 2012 and December 31, 2014 by a mid-cap US stock, returning 3,485.2%.

ASSETDATE% RETURN
Vipshop (VIPS)
5/1/2012 - 12/31/2014
3,485.18%
Par Pacific (PARR)
5/1/2012 - 12/31/2014
2,608.33%
ACADIA Pharmaceuticals (ACAD)
5/1/2012 - 12/31/2014
2,002.65%
Ambarella (AMBA)
5/1/2012 - 12/31/2014
655.89%
Ionis Pharmaceuticals (IONS)
5/1/2012 - 12/31/2014
630.65%
Nexstar Broadcasting (NXST)
5/1/2012 - 12/31/2014
586.78%
Travere Therapeutics (TVTX)
5/1/2012 - 12/31/2014
544.21%
Almonty Industries Inc Common Shares (ALM)
5/1/2012 - 12/31/2014
517.05%
JOYY (JOYY)
5/1/2012 - 12/31/2014
493.71%
Radian (RDN)
5/1/2012 - 12/31/2014
465.27%
Addus HomeCare (ADUS)
5/1/2012 - 12/31/2014
425.32%
American Airlines (AAL)
5/1/2012 - 12/31/2014
424.33%
Pilgrims Pride (PPC)
5/1/2012 - 12/31/2014
358.61%
Avis Budget (CAR)
5/1/2012 - 12/31/2014
353.69%
Saia (SAIA)
5/1/2012 - 12/31/2014
340.76%
Axos Financial (AX)
5/1/2012 - 12/31/2014
338.61%
Novavax (NVAX)
5/1/2012 - 12/31/2014
336.03%
Himax Technologies (HIMX)
5/1/2012 - 12/31/2014
326.96%
Ligand Pharmaceuticals (LGND)
5/1/2012 - 12/31/2014
295.91%
Acadia Healthcare (ACHC)
5/1/2012 - 12/31/2014
283.28%
Celldex Therapeutics (CLDX)
5/1/2012 - 12/31/2014
281.8%
IDT (IDT)
5/1/2012 - 12/31/2014
281.29%
Stagwell (STGW)
5/1/2012 - 12/31/2014
272.9%
Astronics (ATRO)
5/1/2012 - 12/31/2014
261.04%
Alaska Air (ALK)
5/1/2012 - 12/31/2014
259.95%
Mid-cap stocks are treated as having a market cap between $2B and $10B.