Exhibit-21 LACLEDE GAS COMPANY AND SUBSIDIARIES SUBSIDIARIES OF THE REGISTRANT PERCENT OF VOTING STOCK OWNED ------------ Subsidiaries of Laclede Gas Company (Parent) Laclede Pipeline Company 100% Laclede Investment Corporation* 100% Laclede Development Company** 100% *Subsidiary Company of Laclede Investment Corporation Laclede Energy Resources, Inc. 100% Subsidiary Company of Laclede Energy Resources, Inc. 100% Laclede Gas Family Services, Inc. ***Subsidiary Company of Laclede Development Company Laclede Venture Corp. 100% All of the above corporations have been organized under the laws of the State of Missouri. 101