Cracker Barrel Old Country Store (CBRL) had the highest return between 1980 and 1990 by a small-cap US stock, returning 1,360.8%.

ASSET	YEARS	% RETURN
Cracker Barrel Old Country Store (CBRL)	1980-1990	1,360.83%
La-Z-Boy (LZB)	1980-1990	1,283.17%
Sturm Ruger (RGR)	1980-1990	1,228.01%
Ennis (EBF)	1980-1990	1,211.34%
Arrow Financial (AROW)	1980-1990	1,149.49%
Myers Industries (MYE)	1980-1990	1,075.82%
Magnera Corp placeholder (MAGN)	1980-1990	1,005.44%
Seneca Foods Corp B (SENEB)	1980-1990	943.74%
Deluxe (DLX)	1980-1990	881.23%
Oil-Dri Corporation Of America (ODC)	1980-1990	861.18%
FMC (FMC)	1980-1990	857.98%
Flowers Foods (FLO)	1980-1990	802.27%
Weyco (WEYS)	1980-1990	657.32%
Apogee Enterprises (APOG)	1980-1990	558.34%
Distribution Solutions (DSGR)	1980-1990	552.15%
MillerKnoll (MLKN)	1980-1990	526.38%
National Presto Industries (NPK)	1980-1990	520.11%
Kelly Services A (KELYA)	1980-1990	492.67%
Crawford (CRD.B)	1980-1990	425.16%
Middlesex Water (MSEX)	1980-1990	420.55%
NewtekOne (NEWT)	1980-1990	419.99%
Helen of Troy (HELE)	1980-1990	392.8%
Stepan (SCL)	1980-1990	392.59%
Tejon Ranch (TRC)	1980-1990	386.76%
Capital Southwest (CSWC)	1980-1990	371.03%

Small-cap stocks are treated as having a market cap between $300M and $2B.