EXHIBIT 21.1 SUBSIDIARIES OF THE COMPANY State or Jurisdiction of Incorporation or Organization % Owned (1) Jefferson Smurfit Corporation (U.S.) Delaware 100% (2) Smurfit Newsprint Corporation Delaware 100% (3) Packaging Unlimited, Inc. Delaware 100% (4) JSC International Sales, Inc. Barbados 100% (5) CCA de Baja California, S.A. de C.V. Mexico D.F. 100% (6) Jefferson Smurfit Finance Corporation Delaware 100% (7) Groveton Paper Board, Inc. New Hampshire 62.94% (8) Michigan Can & Tube, Inc. Michigan 100%