. . . EXHIBIT 21 SELECTIVE INSURANCE GROUP, INC., SUBSIDIARIES PERCENTAGE JURISDICTION VOTING IN WHICH SECURITIES NAME ORGANIZED PARENT OWNED ALTA Services LLC New Jersey Selective Insurance Group, Inc. 100% Consumer Health Network Plus, LLC New Jersey Selective Insurance Group, Inc. 100% FloodConnect, LLC New Jersey Selective Insurance Group, Inc. 100% Niagara Exchange Corporation Delaware Selective Insurance Group, Inc. 100% SelecTech, LLC New Jersey Selective Way Insurance Company 75% Selective Insurance Company of the Southeast 25% Selective HR Solutions, Inc. Florida Selective Insurance Group, Inc. 100% Selective Insurance Company of America New Jersey Selective Insurance Group, Inc 100% Selective Insurance Company of New York New York Niagara Exchange Corp. 100% Selective Insurance Company of South Carolina South Carolina Selective Insurance Group, Inc. 100% Selective Insurance Company of the Southeast North Carolina Selective Insurance Group, Inc. 100% Selective Specialty Lines Brokerage, LLC New Jersey Selective Insurance Group, Inc. 50% Selective Technical Administrative Resources, Inc. New Jersey Selective Insurance Group, Inc. 100% Selective Way Insurance Company New Jersey Selective Insurance Group, Inc. 100% SRM Insurance Brokerage, LLC New Jersey Selective Way Insurance Company 75% Selective Insurance Company of the Southeast 25% Wantage Avenue Holding Company Inc New Jersey Selective Insurance Company of America 100%