Michael Mason SEC EDGAR Filings (CIK 0001514291)

SEC EDGAR filings, ownership reports, and insider transactions for 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

Recent SEC filings for Michael Mason including 4, 3, 5.

Form type Document Filing Description Filing date Reporting date File number(s)
4 Open 4 document View SEC filing for 4 4 05 Sep 2024 04 Sep 2024 001-36167
4 Open 4 document View SEC filing for 4 4 06 Jun 2024 04 Jun 2024 001-36167
4 Open 4 document View SEC filing for 4 4 04 Mar 2024 29 Feb 2024 001-36167
4 Open 4 document View SEC filing for 4 4 29 Feb 2024 27 Feb 2024 001-36167
4 Open 4 document View SEC filing for 4 4 08 Feb 2024 06 Feb 2024 001-36167
4 Open 4 document View SEC filing for 4 4 25 Jan 2024 24 Jan 2024 001-36167
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 05 Sep 2023 01 Sep 2023 001-36167
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 05 Jun 2023 02 Jun 2023 001-36167
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 02 Mar 2023 28 Feb 2023 001-36167
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 01 Mar 2023 27 Feb 2023 001-36167
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 08 Feb 2023 06 Feb 2023 001-36167
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 01 Sep 2022 31 Aug 2022 001-36167
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 06 Jun 2022 03 Jun 2022 001-36167
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 02 Mar 2022 28 Feb 2022 001-36167
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 09 Feb 2022 07 Feb 2022 001-36167
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 01 Jun 2021 01 Jun 2021 001-36167
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 01 Mar 2021 25 Feb 2021 001-36167
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 17 Feb 2021 11 Feb 2021 001-36167
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 09 Feb 2021 05 Feb 2021 001-36167
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 07 Feb 2020 05 Feb 2020 001-36167
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 25 Feb 2019 25 Feb 2019 001-36167
3 Open 3 document View SEC filing for 3 FORM 3 SUBMISSION 25 Feb 2019 25 Feb 2019 001-36167
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 28 Sep 2018 27 Sep 2018 001-36407
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 23 Aug 2018 21 Aug 2018 001-36407
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 14 Aug 2018 10 Aug 2018 001-36407
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 05 Mar 2018 01 Mar 2018 001-36407
5 Open 5 document View SEC filing for 5 PRIMARY DOCUMENT 09 Feb 2018 31 Dec 2017 001-36407
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 08 Jan 2018 04 Jan 2018 001-36407
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 03 Jan 2018 30 Dec 2017 001-36407
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 21 Dec 2017 20 Dec 2017 001-36407
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 08 Nov 2017 06 Nov 2017 001-36407
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 22 Sep 2017 20 Sep 2017 001-36407
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 11 Jul 2017 07 Jul 2017 001-36407
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 17 May 2017 16 May 2017 001-36407
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 03 Jan 2017 30 Dec 2016 001-36407
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 22 Dec 2016 20 Dec 2016 001-36407
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 03 Feb 2016 01 Feb 2016 001-36407
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 22 Dec 2015 18 Dec 2015 001-36407
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 09 Dec 2015 07 Dec 2015 001-36407
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 03 Jun 2015 01 Jun 2015 001-36407
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 05 May 2015 01 May 2015 001-36407
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 16 Dec 2014 12 Dec 2014 001-36407
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 04 Feb 2014 03 Feb 2014 000-50743
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 27 Jan 2014 23 Jan 2014 000-50743
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 18 Dec 2013 16 Dec 2013 000-50743
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 04 Dec 2013 02 Dec 2013 000-50743
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 12 Jul 2013 12 Jul 2013 000-50743
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 02 Jul 2013 01 Jul 2013 000-50743
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 19 Jun 2013 17 Jun 2013 000-50743
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 21 Dec 2012 20 Dec 2012 000-50743
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 04 Dec 2012 30 Nov 2012 000-50743
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 31 Jul 2012 27 Jul 2012 000-50743
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 18 Jul 2012 16 Jul 2012 000-50743
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 25 Jan 2012 23 Jan 2012 000-50743
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 02 Dec 2011 30 Nov 2011 000-50743
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 03 Mar 2011 28 Feb 2011 000-50743
3 Open 3 document View SEC filing for 3 PRIMARY DOCUMENT 03 Mar 2011 28 Feb 2011 000-50743

About this filer

Michael Mason files with the SEC under CIK 0001514291. This page aggregates EDGAR filings and related ownership activity.

See reporting owner transactions.

FAQ

What is a CIK?
A Central Index Key (CIK) is a unique identifier assigned by the SEC to each filer.
Why are some filings missing?
New filings appear as the SEC updates EDGAR, and older records can vary by availability.
How often is this page updated?
Updates follow new EDGAR submissions and periodic data refreshes.

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