A Republican lawmaker released a report Thursday that he says proves the controversial community activist organization ACORN is alive and well, contrary to its announcement that it is disbanding.

The report from California Rep. Darrell Issa, the top Republican on the House Committee on Oversight and Government Reform, includes details of a recent business transaction between ACORN and a California affiliate that broke away this year and changed its name in a bid to start anew.

The transaction details how membership lists, computer equipment, employees and other assets will be transferred from ACORN to the new organization...