Jonathan B. Siegel

Business address
C/O Kingdon Capital Management, L.L.C., 152 West 57 Th Street, 50 Th Floor, New York, NY, 10019
Top holdings (ownership)
JAGX
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Jonathan B. Siegel has filed 19 SEC EDGAR filings since 04 Oct 2013

Latest Filings

Form type Document Filing Description Filing date Reporting date File number(s)
4 Open Document Open Filing 4 15 Dec 2025 11 Dec 2025 001-36714
4 Open Document Open Filing 4 26 Jun 2025 24 Jun 2025 001-36714
4 Open Document Open Filing 4 02 Apr 2025 31 Mar 2025 001-36714
4 Open Document Open Filing 4 10 Oct 2024 08 Oct 2024 001-36714
4 Open Document Open Filing OWNERSHIP DOCUMENT 14 Aug 2023 14 Aug 2023 001-36714
4 Open Document Open Filing OWNERSHIP DOCUMENT 19 May 2023 17 May 2023 001-36714
4 Open Document Open Filing OWNERSHIP DOCUMENT 18 May 2022 18 May 2022 001-36714
4 Open Document Open Filing OWNERSHIP DOCUMENT 30 Mar 2022 28 Mar 2022 001-36714
3 Open Document Open Filing FORM 3 SUBMISSION 27 Oct 2021 26 Oct 2021 001-40968
4 Open Document Open Filing 4 20 May 2021 18 May 2021 001-36714
4 Open Document Open Filing 4 24 Mar 2020 20 Mar 2020 001-36714
4 Open Document Open Filing 4 25 Jul 2019 23 Jul 2019 001-36714
4 Open Document Open Filing 4 05 Oct 2018 04 Oct 2018 001-36714
4/A Open Document Open Filing 4/A 04 Oct 2018 17 Jul 2018 001-36714
4 Open Document Open Filing 4 20 Jul 2018 18 Jul 2018 001-36714
4 Open Document Open Filing 4 18 Jul 2018 16 Jul 2018 001-36714
4 Open Document Open Filing 4 06 Jun 2018 01 Jun 2018 001-36714
3 Open Document Open Filing 3 10 Apr 2018 29 Mar 2018 001-36714
3 Open Document Open Filing PRIMARY DOCUMENT 04 Oct 2013 16 Sep 2013 001-09601