Suncor Energy (SU) had the highest return between 1991 and 1993 by a large-cap US stock, returning 6,058.9%.

ASSET	YEARS	% RETURN
Suncor Energy (SU)	1991-1993	6,058.88%
Jack Henry & Associates (JKHY)	1991-1993	2,133.28%
Magna International (MGA)	1991-1993	2,042.99%
Royal Gold (RGLD)	1991-1993	1,856.87%
Electronic Arts (EA)	1991-1993	1,163.24%
Best Buy (BBY)	1991-1993	1,140.26%
Cisco Systems (CSCO)	1991-1993	1,081.99%
Lam Research (LRCX)	1991-1993	925.92%
PTC (PTC)	1991-1993	811.75%
Oracle (ORCL)	1991-1993	630.17%
Applied Materials (AMAT)	1991-1993	621.04%
Southwest Airlines (LUV)	1991-1993	555.06%
UnitedHealth (UNH)	1991-1993	553.64%
Toll Brothers (TOL)	1991-1993	552.24%
Charles Schwab (SCHW)	1991-1993	549.68%
Constellation Brands Inc Class A (STZ)	1991-1993	503.21%
Primo Brands (PRMB)	1991-1993	459.95%
General Dynamics (GD)	1991-1993	451.63%
Teva Pharma Industries Ltd ADR (TEVA)	1991-1993	425.07%
Microchip Technology (MCHP)	1991-1993	424.44%
Smith AO (AOS)	1991-1993	417.04%
Lowe's Companies (LOW)	1991-1993	407.24%
Micron Technology (MU)	1991-1993	374.57%
Caseys General Stores (CASY)	1991-1993	357.23%
Aegon NV ADR (AEG)	1991-1993	356.4%

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