F. Thomson Leighton

Entity
Individual
Business address
500 Technology Square, Fifth Floor, 02139 Cambridge, MA
Signature Ownership
/s/ Thomas M. Lair, by power of attorney
All SEC filings
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F. Thomson Leighton has filed 150 SEC EDGAR filings since 2/14/2000

Latest Filings

Form type Document Filing Description Filing date Reporting date File number(s)
4 Open Document Open Filing FORM 4 Aug 12, 2025 Aug 11, 2025 000-27275
4 Open Document Open Filing FORM 4 Mar 7, 2025 Mar 7, 2025 000-27275
4 Open Document Open Filing FORM 4 Mar 6, 2025 Mar 6, 2025 000-27275
4 Open Document Open Filing FORM 4 Mar 5, 2025 Mar 3, 2025 000-27275
4 Open Document Open Filing FORM 4 Feb 27, 2025 Feb 27, 2025 000-27275
4 Open Document Open Filing FORM 4 Feb 25, 2025 Feb 21, 2025 000-27275
4 Open Document Open Filing FORM 4 Feb 21, 2025 Feb 19, 2025 000-27275
4 Open Document Open Filing FORM 4 May 14, 2024 May 14, 2024 000-27275
4 Open Document Open Filing FORM 4 Mar 8, 2024 Mar 7, 2024 000-27275
4 Open Document Open Filing FORM 4 Mar 6, 2024 Mar 4, 2024 000-27275
4 Open Document Open Filing FORM 4 Mar 5, 2024 Mar 1, 2024 000-27275
4 Open Document Open Filing FORM 4 Feb 23, 2024 Feb 21, 2024 000-27275
4 Open Document Open Filing FORM 4 Aug 30, 2023 Aug 28, 2023 000-27275
4 Open Document Open Filing FORM 4 Jun 20, 2023 Jun 20, 2023 000-27275
4 Open Document Open Filing FORM 4 Jun 16, 2023 Jun 14, 2023 000-27275
4 Open Document Open Filing FORM 4 Jun 13, 2023 Jun 12, 2023 000-27275
4 Open Document Open Filing FORM 4 Jun 9, 2023 Jun 7, 2023 000-27275
4 Open Document Open Filing FORM 4 Jun 6, 2023 Jun 5, 2023 000-27275
4 Open Document Open Filing FORM 4 Jun 2, 2023 Jun 1, 2023 000-27275
4 Open Document Open Filing FORM 4 May 31, 2023 May 30, 2023 000-27275
4 Open Document Open Filing FORM 4 May 26, 2023 May 24, 2023 000-27275
4 Open Document Open Filing FORM 4 May 23, 2023 May 22, 2023 000-27275
4 Open Document Open Filing FORM 4 May 19, 2023 May 17, 2023 000-27275
4 Open Document Open Filing FORM 4 May 16, 2023 May 15, 2023 000-27275
4 Open Document Open Filing FORM 4 May 5, 2023 May 4, 2023 000-27275
4 Open Document Open Filing FORM 4 May 3, 2023 May 1, 2023 000-27275
4 Open Document Open Filing FORM 4 Apr 28, 2023 Apr 27, 2023 000-27275
4 Open Document Open Filing FORM 4 Apr 26, 2023 Apr 24, 2023 000-27275
4 Open Document Open Filing FORM 4 Apr 21, 2023 Apr 19, 2023 000-27275
4 Open Document Open Filing FORM 4 Apr 18, 2023 Apr 17, 2023 000-27275
4 Open Document Open Filing FORM 4 Apr 14, 2023 Apr 13, 2023 000-27275
4 Open Document Open Filing FORM 4 Apr 12, 2023 Apr 11, 2023 000-27275
4 Open Document Open Filing FORM 4 Apr 10, 2023 Apr 6, 2023 000-27275
4 Open Document Open Filing FORM 4 Apr 5, 2023 Apr 3, 2023 000-27275
4/A Open Document Open Filing FORM 4/A Mar 31, 2023 Mar 6, 2023 000-27275
4 Open Document Open Filing FORM 4 Mar 31, 2023 Mar 29, 2023 000-27275
4 Open Document Open Filing FORM 4 Mar 28, 2023 Mar 27, 2023 000-27275
4 Open Document Open Filing FORM 4 Mar 24, 2023 Mar 23, 2023 000-27275
4 Open Document Open Filing FORM 4 Mar 22, 2023 Mar 20, 2023 000-27275
4 Open Document Open Filing FORM 4 Mar 17, 2023 Mar 15, 2023 000-27275
4 Open Document Open Filing FORM 4 Mar 14, 2023 Mar 13, 2023 000-27275
4 Open Document Open Filing FORM 4 Mar 10, 2023 Mar 9, 2023 000-27275
4 Open Document Open Filing FORM 4 Mar 8, 2023 Mar 6, 2023 000-27275
4 Open Document Open Filing FORM 4 Mar 6, 2023 Mar 6, 2023 000-27275
4 Open Document Open Filing FORM 4 Mar 3, 2023 Mar 1, 2023 000-27275
4 Open Document Open Filing FORM 4 Feb 28, 2023 Feb 27, 2023 000-27275
4 Open Document Open Filing FORM 4 Feb 24, 2023 Feb 24, 2023 000-27275
4 Open Document Open Filing FORM 4 Feb 23, 2023 Feb 21, 2023 000-27275
4 Open Document Open Filing FORM 4 Feb 21, 2023 Feb 21, 2023 000-27275
4 Open Document Open Filing FORM 4 Feb 10, 2023 Feb 8, 2023 000-27275
4 Open Document Open Filing FORM 4 Feb 7, 2023 Feb 6, 2023 000-27275
4 Open Document Open Filing FORM 4 Feb 3, 2023 Feb 1, 2023 000-27275
4 Open Document Open Filing FORM 4 Jan 31, 2023 Jan 30, 2023 000-27275
4 Open Document Open Filing FORM 4 Jan 27, 2023 Jan 25, 2023 000-27275
4 Open Document Open Filing FORM 4 Jan 24, 2023 Jan 23, 2023 000-27275
4 Open Document Open Filing FORM 4 Jan 20, 2023 Jan 18, 2023 000-27275
4 Open Document Open Filing FORM 4 Jan 17, 2023 Jan 17, 2023 000-27275
4 Open Document Open Filing FORM 4 Jan 13, 2023 Jan 11, 2023 000-27275
4 Open Document Open Filing FORM 4 Jan 10, 2023 Jan 9, 2023 000-27275
4 Open Document Open Filing FORM 4 Jan 6, 2023 Jan 4, 2023 000-27275
4 Open Document Open Filing FORM 4 Jan 3, 2023 Jan 3, 2023 000-27275
4 Open Document Open Filing FORM 4 Dec 30, 2022 Dec 28, 2022 000-27275
4 Open Document Open Filing FORM 4 Dec 27, 2022 Dec 27, 2022 000-27275
4 Open Document Open Filing FORM 4 Dec 23, 2022 Dec 21, 2022 000-27275
4 Open Document Open Filing FORM 4 Dec 20, 2022 Dec 19, 2022 000-27275
4 Open Document Open Filing FORM 4 Dec 16, 2022 Dec 15, 2022 000-27275
4 Open Document Open Filing FORM 4 Dec 14, 2022 Aug 1, 2022 000-27275
4 Open Document Open Filing FORM 4 Mar 9, 2022 Mar 7, 2022 000-27275
4 Open Document Open Filing FORM 4 Mar 4, 2022 Mar 3, 2022 000-27275
4 Open Document Open Filing FORM 4 Mar 3, 2022 Mar 1, 2022 000-27275
4 Open Document Open Filing FORM 4 Feb 24, 2022 Feb 22, 2022 000-27275
4 Open Document Open Filing FORM 4 Feb 23, 2022 Feb 21, 2022 000-27275
4 Open Document Open Filing FORM 4 Mar 3, 2021 Mar 1, 2021 000-27275
4 Open Document Open Filing FORM 4 Feb 22, 2021 Feb 18, 2021 000-27275
4 Open Document Open Filing FORM 4 Feb 10, 2021 Feb 8, 2021 000-27275
5 Open Document Open Filing FORM 5 Jan 15, 2021 Dec 31, 2020 000-27275
4 Open Document Open Filing FORM 4 May 26, 2020 Mar 3, 2020 000-27275
4 Open Document Open Filing FORM 4 Mar 5, 2020 Mar 3, 2020 000-27275
4 Open Document Open Filing FORM 4 Mar 3, 2020 Mar 1, 2020 000-27275
4 Open Document Open Filing FORM 4 Feb 11, 2020 Feb 8, 2020 000-27275
5 Open Document Open Filing FORM 5 Jan 24, 2020 Dec 31, 2019 000-27275
4 Open Document Open Filing FORM 4 Mar 6, 2019 Mar 1, 2019 000-27275
4 Open Document Open Filing FORM 4 Feb 25, 2019 Feb 21, 2019 000-27275
4 Open Document Open Filing FORM 4 Feb 11, 2019 Feb 8, 2019 000-27275
5 Open Document Open Filing FORM 5 Jan 4, 2019 Dec 31, 2018 000-27275
4 Open Document Open Filing FORM 4 Feb 27, 2018 Feb 23, 2018 000-27275
4 Open Document Open Filing FORM 4 Feb 26, 2018 Feb 22, 2018 000-27275
4 Open Document Open Filing FORM 4 Feb 12, 2018 Feb 8, 2018 000-27275
4 Open Document Open Filing FORM 4 Dec 28, 2017 Dec 28, 2017 000-27275
4 Open Document Open Filing FORM 4 Dec 15, 2017 Dec 15, 2017 000-27275
4 Open Document Open Filing FORM 4 Nov 16, 2017 Nov 15, 2017 000-27275
4 Open Document Open Filing FORM 4 Oct 18, 2017 Oct 16, 2017 000-27275
4/A Open Document Open Filing FORM 4/A Sep 29, 2017 Sep 15, 2017 000-27275
4 Open Document Open Filing FORM 4 Sep 18, 2017 Sep 15, 2017 000-27275
4 Open Document Open Filing FORM 4 Aug 16, 2017 Aug 15, 2017 000-27275
4 Open Document Open Filing FORM 4 Jul 17, 2017 Jul 14, 2017 000-27275
4 Open Document Open Filing FORM 4 Jun 16, 2017 Jun 15, 2017 000-27275
4 Open Document Open Filing FORM 4 Jun 1, 2017 May 31, 2017 000-27275
4 Open Document Open Filing FORM 4 Mar 7, 2017 Mar 3, 2017 000-27275
4 Open Document Open Filing FORM 4 Feb 27, 2017 Feb 23, 2017 000-27275
4 Open Document Open Filing FORM 4 Feb 14, 2017 Feb 11, 2017 000-27275
4 Open Document Open Filing FORM 4 Feb 10, 2017 Feb 9, 2017 000-27275
4 Open Document Open Filing FORM 4 Feb 9, 2017 Feb 7, 2017 000-27275
5 Open Document Open Filing FORM 5 Jan 6, 2017 Dec 31, 2016 000-27275
4 Open Document Open Filing FORM 4 Dec 16, 2016 Dec 15, 2016 000-27275
4 Open Document Open Filing FORM 4 Nov 16, 2016 Nov 15, 2016 000-27275
4 Open Document Open Filing FORM 4 Oct 18, 2016 Oct 17, 2016 000-27275
4 Open Document Open Filing FORM 4 Sep 19, 2016 Sep 15, 2016 000-27275
4 Open Document Open Filing FORM 4 Aug 16, 2016 Aug 15, 2016 000-27275
4 Open Document Open Filing FORM 4 Jul 18, 2016 Jul 15, 2016 000-27275
4 Open Document Open Filing FORM 4 Jun 17, 2016 Jun 16, 2016 000-27275
4 Open Document Open Filing FORM 4 May 17, 2016 May 16, 2016 000-27275
4 Open Document Open Filing FORM 4 Apr 18, 2016 Apr 15, 2016 000-27275
4 Open Document Open Filing FORM 4 Mar 17, 2016 Mar 16, 2016 000-27275
4 Open Document Open Filing FORM 4 Mar 7, 2016 Mar 3, 2016 000-27275
4 Open Document Open Filing FORM 4 Feb 17, 2016 Feb 16, 2016 000-27275
4 Open Document Open Filing FORM 4 Feb 16, 2016 Feb 11, 2016 000-27275
4 Open Document Open Filing FORM 4 Feb 10, 2016 Feb 8, 2016 000-27275
4 Open Document Open Filing FORM 4 Jan 4, 2016 Dec 30, 2015 000-27275
4 Open Document Open Filing FORM 4 Sep 16, 2015 Sep 15, 2015 000-27275
4 Open Document Open Filing FORM 4 Feb 17, 2015 Feb 12, 2015 000-27275
4 Open Document Open Filing FORM 4 Feb 11, 2015 Feb 9, 2015 000-27275
5 Open Document Open Filing FORM 5 Feb 10, 2015 Dec 31, 2014 000-27275
4 Open Document Open Filing FORM 4 Nov 6, 2014 Nov 5, 2014 000-27275
4 Open Document Open Filing FORM 4 Aug 5, 2014 Aug 1, 2014 000-27275
4 Open Document Open Filing FORM 4 Feb 10, 2014 Feb 7, 2014 000-27275