Michael Mason

Business address
300 3 Rd Street, Cambridge, MA, 02142
Top holdings (ownership)
KPTI
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Michael Mason has filed 57 SEC EDGAR filings since 03 Mar 2011

Latest Filings

Form type Document Filing Description Filing date Reporting date File number(s)
4 Open Document Open Filing 4 05 Sep 2024 04 Sep 2024 001-36167
4 Open Document Open Filing 4 06 Jun 2024 04 Jun 2024 001-36167
4 Open Document Open Filing 4 04 Mar 2024 29 Feb 2024 001-36167
4 Open Document Open Filing 4 29 Feb 2024 27 Feb 2024 001-36167
4 Open Document Open Filing 4 08 Feb 2024 06 Feb 2024 001-36167
4 Open Document Open Filing 4 25 Jan 2024 24 Jan 2024 001-36167
4 Open Document Open Filing FORM 4 SUBMISSION 05 Sep 2023 01 Sep 2023 001-36167
4 Open Document Open Filing FORM 4 SUBMISSION 05 Jun 2023 02 Jun 2023 001-36167
4 Open Document Open Filing FORM 4 SUBMISSION 02 Mar 2023 28 Feb 2023 001-36167
4 Open Document Open Filing FORM 4 SUBMISSION 01 Mar 2023 27 Feb 2023 001-36167
4 Open Document Open Filing FORM 4 SUBMISSION 08 Feb 2023 06 Feb 2023 001-36167
4 Open Document Open Filing FORM 4 SUBMISSION 01 Sep 2022 31 Aug 2022 001-36167
4 Open Document Open Filing FORM 4 SUBMISSION 06 Jun 2022 03 Jun 2022 001-36167
4 Open Document Open Filing FORM 4 SUBMISSION 02 Mar 2022 28 Feb 2022 001-36167
4 Open Document Open Filing FORM 4 SUBMISSION 09 Feb 2022 07 Feb 2022 001-36167
4 Open Document Open Filing FORM 4 SUBMISSION 01 Jun 2021 01 Jun 2021 001-36167
4 Open Document Open Filing FORM 4 SUBMISSION 01 Mar 2021 25 Feb 2021 001-36167
4 Open Document Open Filing FORM 4 SUBMISSION 17 Feb 2021 11 Feb 2021 001-36167
4 Open Document Open Filing FORM 4 SUBMISSION 09 Feb 2021 05 Feb 2021 001-36167
4 Open Document Open Filing FORM 4 SUBMISSION 07 Feb 2020 05 Feb 2020 001-36167
4 Open Document Open Filing FORM 4 SUBMISSION 25 Feb 2019 25 Feb 2019 001-36167
3 Open Document Open Filing FORM 3 SUBMISSION 25 Feb 2019 25 Feb 2019 001-36167
4 Open Document Open Filing PRIMARY DOCUMENT 28 Sep 2018 27 Sep 2018 001-36407
4 Open Document Open Filing PRIMARY DOCUMENT 23 Aug 2018 21 Aug 2018 001-36407
4 Open Document Open Filing PRIMARY DOCUMENT 14 Aug 2018 10 Aug 2018 001-36407
4 Open Document Open Filing PRIMARY DOCUMENT 05 Mar 2018 01 Mar 2018 001-36407
5 Open Document Open Filing PRIMARY DOCUMENT 09 Feb 2018 31 Dec 2017 001-36407
4 Open Document Open Filing PRIMARY DOCUMENT 08 Jan 2018 04 Jan 2018 001-36407
4 Open Document Open Filing PRIMARY DOCUMENT 03 Jan 2018 30 Dec 2017 001-36407
4 Open Document Open Filing PRIMARY DOCUMENT 21 Dec 2017 20 Dec 2017 001-36407
4 Open Document Open Filing PRIMARY DOCUMENT 08 Nov 2017 06 Nov 2017 001-36407
4 Open Document Open Filing PRIMARY DOCUMENT 22 Sep 2017 20 Sep 2017 001-36407
4 Open Document Open Filing PRIMARY DOCUMENT 11 Jul 2017 07 Jul 2017 001-36407
4 Open Document Open Filing PRIMARY DOCUMENT 17 May 2017 16 May 2017 001-36407
4 Open Document Open Filing PRIMARY DOCUMENT 03 Jan 2017 30 Dec 2016 001-36407
4 Open Document Open Filing PRIMARY DOCUMENT 22 Dec 2016 20 Dec 2016 001-36407
4 Open Document Open Filing PRIMARY DOCUMENT 03 Feb 2016 01 Feb 2016 001-36407
4 Open Document Open Filing PRIMARY DOCUMENT 22 Dec 2015 18 Dec 2015 001-36407
4 Open Document Open Filing PRIMARY DOCUMENT 09 Dec 2015 07 Dec 2015 001-36407
4 Open Document Open Filing PRIMARY DOCUMENT 03 Jun 2015 01 Jun 2015 001-36407
4 Open Document Open Filing PRIMARY DOCUMENT 05 May 2015 01 May 2015 001-36407
4 Open Document Open Filing PRIMARY DOCUMENT 16 Dec 2014 12 Dec 2014 001-36407
4 Open Document Open Filing PRIMARY DOCUMENT 04 Feb 2014 03 Feb 2014 000-50743
4 Open Document Open Filing PRIMARY DOCUMENT 27 Jan 2014 23 Jan 2014 000-50743