Richard Prins

Entity
Individual
Business address
C/O Amphastar Pharmaceuticals, Inc., 11570 6 Th Street, 91730 Rancho Cucamonga, CA
Signature Ownership
/s/ Richard Prins
All SEC filings
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Richard Prins has filed 94 SEC EDGAR filings since 11/14/1997

Latest Filings

Form type Document Filing Description Filing date Reporting date File number(s)
4 Open Document Open Filing Oct 22, 2025 Oct 17, 2025 001-32830
4 Open Document Open Filing Jun 4, 2025 Jun 2, 2025 001-36509
5 Open Document Open Filing May 15, 2025 Mar 31, 2025 001-32830
4 Open Document Open Filing Dec 11, 2024 Dec 9, 2024 001-36509
144 Open Document Open Filing Dec 9, 2024
4 Open Document Open Filing Nov 13, 2024 Nov 12, 2024 001-36509
144 Open Document Open Filing Nov 12, 2024
4 Open Document Open Filing Aug 13, 2024 Aug 12, 2024 001-36509
144 Open Document Open Filing Aug 12, 2024
4 Open Document Open Filing Aug 12, 2024 Aug 12, 2024 001-32830
144 Open Document Open Filing Aug 9, 2024
4 Open Document Open Filing Jun 5, 2024 Jun 3, 2024 001-36509
4 Open Document Open Filing Mar 15, 2024 Mar 13, 2024 001-32830
4 Open Document Open Filing OWNERSHIP DOCUMENT Nov 20, 2023 Nov 17, 2023 001-36509
4 Open Document Open Filing OWNERSHIP DOCUMENT Nov 15, 2023 Nov 13, 2023 001-36509
144 Open Document Open Filing Nov 13, 2023
4 Open Document Open Filing OWNERSHIP DOCUMENT Aug 21, 2023 Aug 18, 2023 001-36509
4 Open Document Open Filing OWNERSHIP DOCUMENT Aug 16, 2023 Aug 15, 2023 001-36509
144 Open Document Open Filing Aug 15, 2023
4 Open Document Open Filing Jun 27, 2023 Mar 31, 2023 001-32830
4 Open Document Open Filing OWNERSHIP DOCUMENT Jun 7, 2023 Jun 5, 2023 001-36509
4 Open Document Open Filing OWNERSHIP DOCUMENT May 16, 2023 May 12, 2023 001-36509
144 Open Document Open Filing May 12, 2023
4 Open Document Open Filing Jun 28, 2022 Mar 21, 2022 001-32830
4 Open Document Open Filing OWNERSHIP DOCUMENT Jun 14, 2022 Jun 10, 2022 001-36509
4 Open Document Open Filing OWNERSHIP DOCUMENT Mar 17, 2022 Mar 15, 2022 001-36509
4 Open Document Open Filing Dec 27, 2021 Dec 20, 2021 001-32830
4 Open Document Open Filing OWNERSHIP DOCUMENT Dec 13, 2021 Dec 10, 2021 001-36509
4 Open Document Open Filing OWNERSHIP DOCUMENT Nov 23, 2021 Nov 22, 2021 001-36509
144 Open Document Open Filing FORM 144 Sep 17, 2021
4 Open Document Open Filing OWNERSHIP DOCUMENT Jun 8, 2021 Jun 4, 2021 001-36509
4 Open Document Open Filing May 14, 2021 May 13, 2021 001-32830
4 Open Document Open Filing OWNERSHIP DOCUMENT May 13, 2021 May 11, 2021 001-36509
4 Open Document Open Filing Mar 10, 2021 Mar 9, 2021 001-32830
4 Open Document Open Filing Mar 8, 2021 Mar 3, 2021 001-32830
144 Open Document Open Filing FORM 144 Mar 2, 2021
4 Open Document Open Filing Dec 4, 2020 Dec 1, 2020 001-32830
4 Open Document Open Filing 4 Aug 12, 2020 Aug 11, 2020 001-36509
5/A Open Document Open Filing Jun 15, 2020 Mar 31, 2020 001-32830
4 Open Document Open Filing 4 Jun 9, 2020 Jun 8, 2020 001-36509
5 Open Document Open Filing May 15, 2020 Mar 31, 2020 001-32830
4 Open Document Open Filing 4 May 14, 2020 May 12, 2020 001-36509
4 Open Document Open Filing 4 Aug 27, 2019 Aug 23, 2019 001-36509
4 Open Document Open Filing 4 Aug 15, 2019 Aug 13, 2019 001-36509
4 Open Document Open Filing 4 Jun 13, 2019 Jun 12, 2019 001-36509
4 Open Document Open Filing Jun 12, 2019 Aug 27, 2018 001-32830
4 Open Document Open Filing 4 Dec 17, 2018 Dec 14, 2018 001-36509
4 Open Document Open Filing 4 Nov 30, 2018 Nov 29, 2018 001-36509
4 Open Document Open Filing 4 Nov 15, 2018 Nov 14, 2018 001-36509
4 Open Document Open Filing 4 Aug 15, 2018 Aug 14, 2018 001-36509
4 Open Document Open Filing 4 Jun 11, 2018 Jun 7, 2018 001-36509
5 Open Document Open Filing OWNERSHIP DOCUMENT May 10, 2018 Mar 31, 2018 001-32830
5 Open Document Open Filing OWNERSHIP DOCUMENT May 10, 2018 Mar 31, 2018 001-32830
4 Open Document Open Filing 4 Mar 16, 2018 Mar 15, 2018 001-36509
4 Open Document Open Filing OWNERSHIP DOCUMENT Dec 5, 2017 Dec 4, 2017 001-32830
4 Open Document Open Filing OWNERSHIP DOCUMENT Dec 5, 2017 Dec 4, 2017 001-32830
4 Open Document Open Filing 4 Aug 16, 2017 Aug 14, 2017 001-36509
4 Open Document Open Filing 4 Jun 12, 2017 Jun 8, 2017 001-36509
4 Open Document Open Filing 4 May 12, 2017 May 11, 2017 001-36509
5 Open Document Open Filing OWNERSHIP DOCUMENT May 11, 2017 Mar 31, 2017 001-32830
4 Open Document Open Filing OWNERSHIP DOCUMENT May 11, 2017 May 9, 2017 001-32830
4 Open Document Open Filing OWNERSHIP DOCUMENT Dec 20, 2016 Dec 16, 2016 001-32830
4 Open Document Open Filing OWNERSHIP DOCUMENT Dec 20, 2016 Dec 16, 2016 001-32830
4 Open Document Open Filing 4 Nov 15, 2016 Nov 11, 2016 001-36509
4 Open Document Open Filing 4 Aug 19, 2016 Aug 18, 2016 001-36509
4 Open Document Open Filing 4 Aug 12, 2016 Aug 11, 2016 001-36509
4 Open Document Open Filing FORM 4 SUBMISSION Jun 13, 2016 Jun 9, 2016 001-36509
4 Open Document Open Filing FORM 4 SUBMISSION May 19, 2016 May 17, 2016 001-36509
5 Open Document Open Filing OWNERSHIP DOCUMENT May 12, 2016 Mar 31, 2016 001-32830
5 Open Document Open Filing OWNERSHIP DOCUMENT May 12, 2016 Mar 31, 2016 001-32830
4 Open Document Open Filing FORM 4 SUBMISSION Mar 21, 2016 Mar 17, 2016 001-36509
4 Open Document Open Filing FORM 4 SUBMISSION Feb 3, 2016 Dec 15, 2015 001-36509
4 Open Document Open Filing FORM 4 SUBMISSION Nov 19, 2015 Nov 17, 2015 001-36509
4 Open Document Open Filing FORM 4 SUBMISSION Aug 19, 2015 Aug 17, 2015 001-36509
4 Open Document Open Filing 4 May 29, 2015 May 27, 2015 001-36509
4 Open Document Open Filing 4 May 22, 2015 May 20, 2015 001-36509
4 Open Document Open Filing 4 May 20, 2015 May 19, 2015 001-36509
5 Open Document Open Filing OWNERSHIP DOCUMENT May 13, 2015 Mar 31, 2015 001-32830
4/A Open Document Open Filing OWNERSHIP DOCUMENT May 13, 2015 Oct 16, 2014 001-32830
4/A Open Document Open Filing OWNERSHIP DOCUMENT May 13, 2015 Oct 16, 2014 001-32830
5/A Open Document Open Filing OWNERSHIP DOCUMENT May 13, 2015 Mar 31, 2014 001-32830
4 Open Document Open Filing PRIMARY DOCUMENT Nov 20, 2014 Oct 16, 2014 001-32830
4 Open Document Open Filing PRIMARY DOCUMENT Nov 20, 2014 Oct 16, 2014 001-32830
5 Open Document Open Filing PRIMARY DOCUMENT Oct 10, 2014 Mar 31, 2014 001-32830
4 Open Document Open Filing 4 Aug 19, 2014 Aug 15, 2014 001-36509
3 Open Document Open Filing 3 Jun 24, 2014 Jun 24, 2014 001-36509