Rong Zhou

Business address
C/O Amphastar Pharmaceuticals Inc., 11570 Sixth Street, Rancho Cucamonga, CA, 91730
Top holdings (ownership)
AMPH
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Rong Zhou has filed 65 SEC EDGAR filings since 17 Jun 2015

Latest Filings

Form type Document Filing Description Filing date Reporting date File number(s)
4 Open Document Open Filing 18 Dec 2025 17 Dec 2025 001-36509
144 Open Document Open Filing 28 Nov 2025
4 Open Document Open Filing 18 Mar 2025 15 Mar 2025 001-36509
4 Open Document Open Filing 12 Mar 2025 10 Mar 2025 001-36509
4 Open Document Open Filing 10 Mar 2025 06 Mar 2025 001-36509
4 Open Document Open Filing 06 Mar 2025 04 Mar 2025 001-36509
4 Open Document Open Filing 16 Dec 2024 12 Dec 2024 001-36509
4 Open Document Open Filing 13 Nov 2024 12 Nov 2024 001-36509
144 Open Document Open Filing 12 Nov 2024
4 Open Document Open Filing 17 Sep 2024 13 Sep 2024 001-36509
4 Open Document Open Filing 27 Aug 2024 26 Aug 2024 001-36509
144 Open Document Open Filing 26 Aug 2024
4 Open Document Open Filing 19 Mar 2024 15 Mar 2024 001-36509
4 Open Document Open Filing 08 Mar 2024 06 Mar 2024 001-36509
4 Open Document Open Filing 06 Mar 2024 04 Mar 2024 001-36509
4 Open Document Open Filing OWNERSHIP DOCUMENT 05 Dec 2023 01 Dec 2023 001-36509
144 Open Document Open Filing 17 Nov 2023
4 Open Document Open Filing OWNERSHIP DOCUMENT 21 Jun 2023 20 Jun 2023 001-36509
4 Open Document Open Filing OWNERSHIP DOCUMENT 20 Jun 2023 15 Jun 2023 001-36509
4 Open Document Open Filing OWNERSHIP DOCUMENT 14 Jun 2023 13 Jun 2023 001-36509
4 Open Document Open Filing OWNERSHIP DOCUMENT 19 May 2023 18 May 2023 001-36509
144 Open Document Open Filing 17 May 2023
4 Open Document Open Filing OWNERSHIP DOCUMENT 20 Mar 2023 16 Mar 2023 001-36509
4 Open Document Open Filing OWNERSHIP DOCUMENT 17 Mar 2023 15 Mar 2023 001-36509
4 Open Document Open Filing OWNERSHIP DOCUMENT 08 Mar 2023 06 Mar 2023 001-36509
4 Open Document Open Filing OWNERSHIP DOCUMENT 18 Mar 2022 16 Mar 2022 001-36509
4 Open Document Open Filing OWNERSHIP DOCUMENT 17 Mar 2022 15 Mar 2022 001-36509
4 Open Document Open Filing OWNERSHIP DOCUMENT 01 Mar 2022 25 Feb 2022 001-36509
4 Open Document Open Filing OWNERSHIP DOCUMENT 09 Feb 2022 08 Feb 2022 001-36509
4 Open Document Open Filing OWNERSHIP DOCUMENT 11 Jan 2022 10 Jan 2022 001-36509
4 Open Document Open Filing OWNERSHIP DOCUMENT 12 Nov 2021 11 Nov 2021 001-36509
4 Open Document Open Filing OWNERSHIP DOCUMENT 04 Aug 2021 02 Aug 2021 001-36509
4 Open Document Open Filing OWNERSHIP DOCUMENT 27 Jul 2021 26 Jul 2021 001-36509
4 Open Document Open Filing OWNERSHIP DOCUMENT 22 Jul 2021 20 Jul 2021 001-36509
4 Open Document Open Filing OWNERSHIP DOCUMENT 10 Jun 2021 08 Jun 2021 001-36509
4 Open Document Open Filing OWNERSHIP DOCUMENT 17 May 2021 13 May 2020 001-36509
4 Open Document Open Filing OWNERSHIP DOCUMENT 18 Mar 2021 16 Mar 2021 001-36509
4 Open Document Open Filing OWNERSHIP DOCUMENT 17 Mar 2021 15 Mar 2021 001-36509
4 Open Document Open Filing 4 05 Jun 2020 03 Jun 2020 001-36509
4 Open Document Open Filing 4 18 Mar 2020 16 Mar 2020 001-36509
4 Open Document Open Filing 4 17 Mar 2020 15 Mar 2020 001-36509
4 Open Document Open Filing 4 17 Jun 2019 14 Jun 2019 001-36509
4 Open Document Open Filing 4 07 May 2019 06 May 2019 001-36509
4 Open Document Open Filing 4 28 Mar 2019 26 Mar 2019 001-36509
4 Open Document Open Filing 4 18 Mar 2019 15 Mar 2019 001-36509
4 Open Document Open Filing 4 04 Mar 2019 01 Mar 2019 001-36509
4/A Open Document Open Filing 4/A 04 Mar 2019 05 Feb 2019 001-36509
4 Open Document Open Filing 4 07 Feb 2019 05 Feb 2019 001-36509
4 Open Document Open Filing 4 06 Dec 2018 03 Dec 2018 001-36509
4 Open Document Open Filing 4 13 Nov 2018 08 Nov 2018 001-36509
4 Open Document Open Filing 4 18 Jun 2018 15 Jun 2018 001-36509
4 Open Document Open Filing 4 28 Mar 2018 26 Mar 2018 001-36509
4 Open Document Open Filing 4 20 Mar 2018 16 Mar 2018 001-36509
4 Open Document Open Filing 4 16 Mar 2018 15 Mar 2018 001-36509
4 Open Document Open Filing 4 16 Jun 2017 15 Jun 2017 001-36509
4 Open Document Open Filing 4 28 Mar 2017 26 Mar 2017 001-36509
4 Open Document Open Filing 4 20 Mar 2017 16 Mar 2017 001-36509
4 Open Document Open Filing 4 07 Dec 2016 05 Dec 2016 001-36509
4 Open Document Open Filing FORM 4 SUBMISSION 17 Jun 2016 15 Jun 2016 001-36509
4 Open Document Open Filing FORM 4 SUBMISSION 29 Mar 2016 26 Mar 2016 001-36509
4 Open Document Open Filing FORM 4 SUBMISSION 21 Mar 2016 17 Mar 2016 001-36509
4 Open Document Open Filing FORM 4 SUBMISSION 17 Dec 2015 16 Dec 2015 001-36509
4 Open Document Open Filing FORM 4 SUBMISSION 19 Jun 2015 17 Jun 2015 001-36509
4 Open Document Open Filing FORM 4 SUBMISSION 17 Jun 2015 15 Jun 2015 001-36509
3 Open Document Open Filing FORM 3 SUBMISSION 17 Jun 2015 09 Jun 2015 001-36509