RICHARD K. PRINS

Business address
C/O Amphastar Pharmaceuticals, Inc., 11570 6 Th Street, Rancho Cucamonga, CA, 91730
Top holdings (ownership)
AMPH and IGC
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RICHARD K. PRINS has filed 96 SEC EDGAR filings since 14 Nov 1997

Latest Filings

Form type Document Filing Description Filing date Reporting date File number(s)
144 Open Document Open Filing 25 Nov 2025
4 Open Document Open Filing 25 Nov 2025 25 Nov 2025 001-36509
4 Open Document Open Filing 22 Oct 2025 17 Oct 2025 001-32830
4 Open Document Open Filing 04 Jun 2025 02 Jun 2025 001-36509
5 Open Document Open Filing 15 May 2025 31 Mar 2025 001-32830
4 Open Document Open Filing 11 Dec 2024 09 Dec 2024 001-36509
144 Open Document Open Filing 09 Dec 2024
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 13 Aug 2024 12 Aug 2024 001-36509
144 Open Document Open Filing 12 Aug 2024
4 Open Document Open Filing 12 Aug 2024 12 Aug 2024 001-32830
144 Open Document Open Filing 09 Aug 2024
4 Open Document Open Filing 05 Jun 2024 03 Jun 2024 001-36509
4 Open Document Open Filing 15 Mar 2024 13 Mar 2024 001-32830
4 Open Document Open Filing OWNERSHIP DOCUMENT 20 Nov 2023 17 Nov 2023 001-36509
4 Open Document Open Filing OWNERSHIP DOCUMENT 15 Nov 2023 13 Nov 2023 001-36509
144 Open Document Open Filing 13 Nov 2023
4 Open Document Open Filing OWNERSHIP DOCUMENT 21 Aug 2023 18 Aug 2023 001-36509
4 Open Document Open Filing OWNERSHIP DOCUMENT 16 Aug 2023 15 Aug 2023 001-36509
144 Open Document Open Filing 15 Aug 2023
4 Open Document Open Filing 27 Jun 2023 31 Mar 2023 001-32830
4 Open Document Open Filing OWNERSHIP DOCUMENT 07 Jun 2023 05 Jun 2023 001-36509
4 Open Document Open Filing OWNERSHIP DOCUMENT 16 May 2023 12 May 2023 001-36509
144 Open Document Open Filing 12 May 2023
4 Open Document Open Filing 28 Jun 2022 21 Mar 2022 001-32830
4 Open Document Open Filing OWNERSHIP DOCUMENT 14 Jun 2022 10 Jun 2022 001-36509
4 Open Document Open Filing OWNERSHIP DOCUMENT 17 Mar 2022 15 Mar 2022 001-36509
4 Open Document Open Filing 27 Dec 2021 20 Dec 2021 001-32830
4 Open Document Open Filing OWNERSHIP DOCUMENT 13 Dec 2021 10 Dec 2021 001-36509
4 Open Document Open Filing OWNERSHIP DOCUMENT 23 Nov 2021 22 Nov 2021 001-36509
144 Open Document Open Filing FORM 144 17 Sep 2021
4 Open Document Open Filing OWNERSHIP DOCUMENT 08 Jun 2021 04 Jun 2021 001-36509
4 Open Document Open Filing 14 May 2021 13 May 2021 001-32830
4 Open Document Open Filing OWNERSHIP DOCUMENT 13 May 2021 11 May 2021 001-36509
4 Open Document Open Filing 10 Mar 2021 09 Mar 2021 001-32830
4 Open Document Open Filing 08 Mar 2021 03 Mar 2021 001-32830
144 Open Document Open Filing FORM 144 02 Mar 2021
4 Open Document Open Filing 04 Dec 2020 01 Dec 2020 001-32830
4 Open Document Open Filing 4 12 Aug 2020 11 Aug 2020 001-36509
5/A Open Document Open Filing 15 Jun 2020 31 Mar 2020 001-32830
4 Open Document Open Filing 4 09 Jun 2020 08 Jun 2020 001-36509
5 Open Document Open Filing 15 May 2020 31 Mar 2020 001-32830
4 Open Document Open Filing 4 14 May 2020 12 May 2020 001-36509
4 Open Document Open Filing 4 27 Aug 2019 23 Aug 2019 001-36509
4 Open Document Open Filing 4 15 Aug 2019 13 Aug 2019 001-36509
4 Open Document Open Filing 4 13 Jun 2019 12 Jun 2019 001-36509
4 Open Document Open Filing 12 Jun 2019 27 Aug 2018 001-32830
4 Open Document Open Filing 4 17 Dec 2018 14 Dec 2018 001-36509
4 Open Document Open Filing 4 30 Nov 2018 29 Nov 2018 001-36509
4 Open Document Open Filing 4 15 Nov 2018 14 Nov 2018 001-36509
4 Open Document Open Filing 4 15 Aug 2018 14 Aug 2018 001-36509
4 Open Document Open Filing 4 11 Jun 2018 07 Jun 2018 001-36509
5 Open Document Open Filing OWNERSHIP DOCUMENT 10 May 2018 31 Mar 2018 001-32830
5 Open Document Open Filing OWNERSHIP DOCUMENT 10 May 2018 31 Mar 2018 001-32830
4 Open Document Open Filing 4 16 Mar 2018 15 Mar 2018 001-36509
4 Open Document Open Filing OWNERSHIP DOCUMENT 05 Dec 2017 04 Dec 2017 001-32830
4 Open Document Open Filing OWNERSHIP DOCUMENT 05 Dec 2017 04 Dec 2017 001-32830
4 Open Document Open Filing 4 16 Aug 2017 14 Aug 2017 001-36509
4 Open Document Open Filing 4 12 Jun 2017 08 Jun 2017 001-36509
4 Open Document Open Filing 4 12 May 2017 11 May 2017 001-36509
5 Open Document Open Filing OWNERSHIP DOCUMENT 11 May 2017 31 Mar 2017 001-32830
4 Open Document Open Filing OWNERSHIP DOCUMENT 11 May 2017 09 May 2017 001-32830
4 Open Document Open Filing OWNERSHIP DOCUMENT 20 Dec 2016 16 Dec 2016 001-32830
4 Open Document Open Filing OWNERSHIP DOCUMENT 20 Dec 2016 16 Dec 2016 001-32830
4 Open Document Open Filing 4 15 Nov 2016 11 Nov 2016 001-36509
4 Open Document Open Filing 4 19 Aug 2016 18 Aug 2016 001-36509
4 Open Document Open Filing 4 12 Aug 2016 11 Aug 2016 001-36509
4 Open Document Open Filing FORM 4 SUBMISSION 13 Jun 2016 09 Jun 2016 001-36509
4 Open Document Open Filing FORM 4 SUBMISSION 19 May 2016 17 May 2016 001-36509
5 Open Document Open Filing OWNERSHIP DOCUMENT 12 May 2016 31 Mar 2016 001-32830
5 Open Document Open Filing OWNERSHIP DOCUMENT 12 May 2016 31 Mar 2016 001-32830
4 Open Document Open Filing FORM 4 SUBMISSION 21 Mar 2016 17 Mar 2016 001-36509
4 Open Document Open Filing FORM 4 SUBMISSION 03 Feb 2016 15 Dec 2015 001-36509
4 Open Document Open Filing FORM 4 SUBMISSION 19 Nov 2015 17 Nov 2015 001-36509
4 Open Document Open Filing FORM 4 SUBMISSION 19 Aug 2015 17 Aug 2015 001-36509
4 Open Document Open Filing 4 29 May 2015 27 May 2015 001-36509
4 Open Document Open Filing 4 22 May 2015 20 May 2015 001-36509
4 Open Document Open Filing 4 20 May 2015 19 May 2015 001-36509
5 Open Document Open Filing OWNERSHIP DOCUMENT 13 May 2015 31 Mar 2015 001-32830
4/A Open Document Open Filing OWNERSHIP DOCUMENT 13 May 2015 16 Oct 2014 001-32830
4/A Open Document Open Filing OWNERSHIP DOCUMENT 13 May 2015 16 Oct 2014 001-32830
5/A Open Document Open Filing OWNERSHIP DOCUMENT 13 May 2015 31 Mar 2014 001-32830
4 Open Document Open Filing PRIMARY DOCUMENT 20 Nov 2014 16 Oct 2014 001-32830
4 Open Document Open Filing PRIMARY DOCUMENT 20 Nov 2014 16 Oct 2014 001-32830
5 Open Document Open Filing PRIMARY DOCUMENT 10 Oct 2014 31 Mar 2014 001-32830
4 Open Document Open Filing 4 19 Aug 2014 15 Aug 2014 001-36509
3 Open Document Open Filing 3 24 Jun 2014 24 Jun 2014 001-36509