EXHIBIT 21A SUBSIDIARIES OF WPL HOLDINGS, INC. The subsidiaries and affiliates of as of December 31, 1996, are as follows: Name of Subsidiary % of Voting Stock Owned Directly or Indirectly by the Company State of Incor. A. Wisconsin Power and Light Company (100%) Wisconsin 1. South Beloit Water, Gas and Electric Company (100%) Illinois 2. REAC, Inc (100%) Wisconsin 3. Wisconsin River Power Company (33-1/3%) Wisconsin 4. Wisconsin Valley Improvement Company (13%) Wisconsin B. Heartland Development Corporation (98.91%) Wisconsin 1. Energy Services a. Heartland Energy Services, Inc. (100%) Wisconsin b. Enserv, Inc. (100%) Wisconsin 2. Environmental Services a. Environmental Holding Company (95%) Wisconsin b. RMT, Inc. (100%) Wisconsin c. Jones & Neuse, Inc. (100%) Wisconsin d. QES, Inc. (100%) Wisconsin 3. Affordable Housing a. Heartland Properties, Inc. (100%) Wisconsin b. Tool Kit Property Management Systems, Inc. (100%) Wisconsin c. Capital Square Financial Corp. (100%) Wisconsin d. Heartland Capital Co. (47%) Wisconsin C. WPLH Acquisition Co. (100%) Wisconsin