Allient (ALNT) had the highest return between 1980 and 1985 by a US stock in the Nasdaq Composite (IXIC), returning 613.8%.

ASSET	YEARS	% RETURN
Allient (ALNT)	1980-1985	613.75%
Seneca Foods Corp B (SENEB)	1980-1985	611.91%
H2O America (HTO)	1980-1985	502.68%
Newell Brands (NWL)	1980-1985	420.64%
Escalade (ESCA)	1980-1985	414.07%
KLA-Tencor (KLAC)	1980-1985	397.26%
Cincinnati Financial (CINF)	1980-1985	387.34%
CECO Environmental (CECO)	1980-1985	376.18%
Analog Devices (ADI)	1980-1985	352.91%
Selective Insurance (SIGI)	1980-1985	295.61%
Automatic Data Processing (ADP)	1980-1985	272.94%
Goodyear Tire & Rubber (GT)	1980-1985	254.46%
Western Digital (WDC)	1980-1985	250.03%
Commerce Bancshares (CBSH)	1980-1985	234.62%
Astronics (ATRO)	1980-1985	231.34%
Intergroup (INTG)	1980-1985	230.76%
Kimberly-Clark (KMB)	1980-1985	220.96%
Zions Bancorporation (ZION)	1980-1985	218.75%
Avnet (AVT)	1980-1985	210.99%
Exelon (EXC)	1980-1985	185.48%
Evergy (EVRG)	1980-1985	180.43%
Arrow Financial (AROW)	1980-1985	178.99%
Distribution Solutions (DSGR)	1980-1985	178.23%
United Fire (UFCS)	1980-1985	176.52%
Reading International (RDI)	1980-1985	166.35%