Nancy T. Chang

Entity
Individual
Business address
101 Westcott, Suite 603, 77007 Houston, TX
Insider ownership signature
/s/ Dr. Nancy T. Chang
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Nancy T. Chang has filed 65 SEC EDGAR filings since 2/14/2001

Latest Filings

Form type Document Filing Description Filing date Reporting date File number(s)
3 Open Document Open Filing Sep 17, 2025 Sep 8, 2025 001-41159
4 Open Document Open Filing OWNERSHIP DOCUMENT Jun 5, 2025 Jun 3, 2025 001-32414
4 Open Document Open Filing Feb 26, 2025 Feb 24, 2025 001-39114
4 Open Document Open Filing Jan 2, 2025 Dec 30, 2024 001-39114
3 Open Document Open Filing Jan 2, 2025 Dec 30, 2024 001-39114
4 Open Document Open Filing OWNERSHIP DOCUMENT Jun 18, 2024 Jun 14, 2024 001-32414
4 Open Document Open Filing OWNERSHIP DOCUMENT Jul 6, 2023 Jul 3, 2023 001-32414
3 Open Document Open Filing OWNERSHIP DOCUMENT May 2, 2023 Apr 28, 2023 001-32414
3 Open Document Open Filing Oct 19, 2020 Oct 19, 2020 001-39630
SC 13G Open Document Open Filing SCHEDULE 13G Feb 1, 2019
4 Open Document Open Filing FORM 4 SUBMISSION Oct 16, 2017 Oct 13, 2017 000-19825
4 Open Document Open Filing PRIMARY DOCUMENT Jun 9, 2017 Jun 8, 2017 000-19825
4 Open Document Open Filing PRIMARY DOCUMENT Sep 29, 2016 Sep 29, 2016 000-19825
4 Open Document Open Filing PRIMARY DOCUMENT Aug 30, 2016 Aug 26, 2016 000-19825
4 Open Document Open Filing PRIMARY DOCUMENT Jun 13, 2016 Jun 9, 2016 000-19825
4 Open Document Open Filing PRIMARY DOCUMENT Jun 12, 2015 Jun 11, 2015 000-19825
4 Open Document Open Filing PRIMARY DOCUMENT Feb 13, 2015 Feb 12, 2015 000-19825
SC 13G/A Open Document Open Filing FORM SC 13G/A Feb 5, 2015
4 Open Document Open Filing FORM 4 SUBMISSION Aug 19, 2014 Aug 15, 2014 000-19825
4 Open Document Open Filing FORM 4 SUBMISSION Jun 16, 2014 Jun 12, 2014 000-19825
SC 13G Open Document Open Filing SC 13G Feb 13, 2014