1、TableofContentsUNITEDSTATESSECURITIESANDEXCHANGECOMMISSIONWashington,D.C.20549FORM10-KANNUALREPORTPURSUANTTOSECTION13or15(d)OFTHESECURITIESEXCHANGEACTOF1934ForthefiscalyearendedDecember31,2019ORTRANSITIONREPORTPURSUANTTOSection13or15(d)OFTHESECURITIESEXCHANGEACTOF1934Forthetransitionperiodfromto.Com
2、missionfilenumber:001-39120USECOLOGY,INC.(Exactnameofregistrantasspecifiedinitscharter)Delaware(Stateorotherjurisdictionofincorporationororganization)84-2421185(I.R.S.EmployerIdentificationNo.)101S.CapitolBlvd.,Suite1000Boise,Idaho(Addressofprincipalexecutiveoffices)83702(ZipCode)Registrantstelephon
3、enumber,includingareacode:(208)331-8400SecuritiesregisteredpursuanttoSection12(b)oftheAct:TitleofeachclassTradingSymbol(s)NameofeachexchangeonwhichregisteredCommonStock,parvalue$0.01pershareECOLNasdaqGlobalSelectMarketWarrantstoPurchaseCommonStockECOLWNasdaqCapitalMarketSecuritiesregisteredpursuantt
4、oSection12(g)oftheAct:NoneIndicatebycheckmarkiftheregistrantisawell-knownseasonedissuer,asdefinedinRule405oftheSecuritiesAct.YesNoIndicatebycheckmarkiftheregistrantisnotrequiredtofilereportspursuanttoSection13orSection15(d)oftheAct.YesNoIndicatebycheckmarkwhethertheregistrant(1)hasfiledallreportsreq
5、uiredtobefiledbySection13or15(d)oftheSecuritiesExchangeActof1934duringthepreceding12months(orforsuchshorterperiodthattheRegistrantwasrequiredtofilesuchreports),and(2)hasbeensubjecttosuchfilingrequirementsforthepast90days.YesNoIndicatebycheckmarkwhethertheregistranthassubmittedelectronicallyeveryInte
6、ractiveDataFilerequiredtobesubmittedpursuanttoRule405ofRegulationS-T(232.405ofthischapter)duringthepreceding12months(orforsuchshorterperiodthattheregistrantwasrequiredtosubmitsuchfiles).YesNoIndicatebycheckmarkwhethertheregistrantisalargeacceleratedfiler,anacceleratedfiler,anon-acceleratedfiler,smal