X0202 3 2005-11-21 0 0001133260 UNION DRILLING INC UDRL 0001008024 ZIEGLER WILLIAM R 230 PARK AVENUE, 11TH FLOOR NEW YORK NY 10169 1 0 1 0 Common Stock 138558 D Common Stock 13162936 I By Union Drilling Company LLC The Reporting Person is the Chairman and CEO, and one of five members of the Board of Representatives, of Union Drilling Company LLC, a Delaware limited liability company ("UDC LLC"). The Reporting Person disclaims beneficial ownership of the shares of common stock owned by UDC LLC, except to the extent of any pecuniary interest that he has in such shares through other entities that hold membership interests in UDC LLC. /s/ William R. Ziegler 2005-11-21