KOY W. DIEPHOLZ

Business address
222 W. Las Colinas Blvd., Suite 1910 North Tower, Irving, TX, 75039
Top holdings (ownership)
DYNR
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KOY W. DIEPHOLZ has filed 22 SEC EDGAR filings since 24 Sep 2009

Latest Filings

Form type Document Filing Description Filing date Reporting date File number(s)
4 Open Document Open Filing 4 15 Aug 2025 13 Aug 2025 000-30371
4 Open Document Open Filing 4 21 Apr 2025 16 Apr 2025 000-30371
4 Open Document Open Filing 4 04 Apr 2025 28 Dec 2022 000-30371
SC 13D/A Open Document Open Filing SC 13D/A 03 Jun 2022
4 Open Document Open Filing PRIMARY DOCUMENT 31 May 2022 15 Nov 2021 000-30371
SC 13D Open Document Open Filing K.W. ("K.D.") DIEPHOLZ 08 May 2015
4 Open Document Open Filing OWNERSHIP DOCUMENT 30 Apr 2015 05 Jan 2015 000-30371
4 Open Document Open Filing OWNERSHIP DOCUMENT 30 Apr 2015 06 Aug 2014 000-30371
4 Open Document Open Filing OWNERSHIP DOCUMENT 30 Apr 2015 08 Jan 2014 000-30371
4 Open Document Open Filing OWNERSHIP DOCUMENT 30 Apr 2015 29 Nov 2013 000-30371
4 Open Document Open Filing OWNERSHIP DOCUMENT 30 Apr 2015 03 Apr 2013 000-30371
5 Open Document Open Filing OWNERSHIP DOCUMENT 17 Apr 2013 04 Oct 2012 000-30371
5 Open Document Open Filing OWNERSHIP DOCUMENT 17 Apr 2013 23 Jan 2012 000-30371
4 Open Document Open Filing OWNERSHIP DOCUMENT 17 Apr 2013 01 May 2012 000-30371
4 Open Document Open Filing OWNERSHIP DOCUMENT 17 Apr 2013 20 Feb 2013 000-30371
4 Open Document Open Filing OWNERSHIP DOCUMENT 17 Apr 2013 03 Jan 2013 000-30371
4 Open Document Open Filing OWNERSHIP DOCUMENT 11 Apr 2012 23 Jan 2012 000-30371
4 Open Document Open Filing OWNERSHIP DOCUMENT 17 Jan 2012 05 Jan 2012 000-30371
5 Open Document Open Filing OWNERSHIP DOCUMENT 17 Jan 2012 31 Dec 2011 000-30371