Centrais Electricas Brasileiras (EBR) had the highest return in Q2 2016 by a large-cap US stock, returning 115.3%.

ASSET	QUARTER	% RETURN
Centrais Electricas Brasileiras (EBR)	Q2 2016	115.3%
Energy Transfer (ET)	Q2 2016	113.94%
Advanced Micro Devices (AMD)	Q2 2016	84.23%
Teck Resources Ltd Class B (TECK)	Q2 2016	78.58%
ONEOK (OKE)	Q2 2016	65.92%
Barrick Gold (GOLD)	Q2 2016	61.81%
Agnico Eagle Mines (AEM)	Q2 2016	52.74%
Twilio (TWLO)	Q2 2016	52.15%
Zillow Group Inc Class C (Z)	Q2 2016	51.48%
Wix (WIX)	Q2 2016	50.92%
Newmont Goldcorp (NEM)	Q2 2016	50.56%
Kinross Gold (KGC)	Q2 2016	49.99%
Targa Resources (TRGP)	Q2 2016	49.43%
Wheaton Precious Metals (WPM)	Q2 2016	45.71%
Williams Companies (WMB)	Q2 2016	41.94%
Zillow (ZG)	Q2 2016	40.96%
Marathon Oil (MRO)	Q2 2016	40.2%
Plains All American Pipeline (PAA)	Q2 2016	38.59%
Companhia de Saneamento Basico do Estado de Sao Paulo SABESP ADR (SBS)	Q2 2016	38.09%
Devon Energy (DVN)	Q2 2016	37.6%
Veeva Systems Inc Class A (VEEV)	Q2 2016	37.3%
NetEase (NTES)	Q2 2016	36.35%
AngloGold Ashanti (AU)	Q2 2016	35.18%
Micron Technology (MU)	Q2 2016	33.85%
Ovintiv (OVV)	Q2 2016	33.18%

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