inactive LEADERSHIP DEVELOPMENT INSTITUTE, INC. (Iowa (US), 19 Jul 1985-24 Nov 1986)
inactive EMPLOYER SERVICES, INC. (Iowa (US), 29 Nov 1995-18 Aug 1997)
inactive SPORTS MEDICINE COMPANY (Iowa (US), 20 Aug 1976-18 Aug 1997)
inactive ANNCO COMPANY (Iowa (US), 23 Oct 2000- 2 Aug 2004)
inactive JGY, LLC (Iowa (US), 12 Oct 2011- 9 Aug 2019)
inactive DMIR, LLC (Iowa (US), 22 Oct 2003-10 Aug 2015)
QTM, LLC (Iowa (US), 22 Oct 2003- )
TGY, LLC (Iowa (US), 22 Oct 2003- )
inactive QTP, LLC (Iowa (US), 22 Oct 2003- 9 Aug 2019)
FLGY, LLC (Iowa (US), 22 Oct 2003- )
WITGY, LLC (Iowa (US), 22 Oct 2003- )
SPORTS MEDICINE COMPANY (Iowa (US), 9 May 2000- )
UGY, LLC (Iowa (US), 22 Oct 2003- )
KCGY, LLC (Iowa (US), 22 Oct 2003- )
inactive PETER D. WIRTZ, M. D., P. C. (Iowa (US), 1 May 1973- 6 Jan 2015)
inactive WIRTZ, STRAND, AND ASSOCIATES, INC. (Iowa (US), 16 Feb 1988- 8 Dec 1989)
inactive PETER WIRTZ & ASSOCIATES, INC. (Iowa (US), 21 Oct 1993- 5 Dec 1994)
