Atlas Venture Fund X, L.P.

Business address
400 Technology Square, 10 Th Floor, 02139 Cambridge, MA
State of incorporation
DE
Fiscal year end
December 31
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Atlas Venture Fund X, L.P. has filed 104 SEC EDGAR filings since 12/18/2014

Latest Filings

Form type Document Filing Description Filing date Reporting date File number(s)
144 Open Document Open Filing Oct 17, 2025
144 Open Document Open Filing Oct 16, 2025
144 Open Document Open Filing Oct 15, 2025
144 Open Document Open Filing Aug 22, 2025
SCHEDULE 13D/A Open Document Open Filing Aug 15, 2025
144 Open Document Open Filing Aug 14, 2025
144 Open Document Open Filing Aug 13, 2025
144 Open Document Open Filing Aug 5, 2025
144 Open Document Open Filing Jul 30, 2025
SCHEDULE 13D/A Open Document Open Filing Jul 29, 2025
144 Open Document Open Filing Jul 24, 2025
144 Open Document Open Filing Jul 23, 2025
144 Open Document Open Filing Jul 18, 2025
144 Open Document Open Filing Feb 5, 2025
144 Open Document Open Filing Feb 4, 2025
144 Open Document Open Filing Feb 3, 2025
SC 13G/A Open Document Open Filing SC 13G/A Nov 14, 2024
SC 13D/A Open Document Open Filing SC 13D/A Oct 28, 2024
144 Open Document Open Filing Jul 9, 2024
144 Open Document Open Filing Jun 13, 2024
144 Open Document Open Filing Jun 12, 2024
SC 13D Open Document Open Filing SC 13D Apr 1, 2024
3 Open Document Open Filing 3 Mar 27, 2024 Mar 25, 2024 001-38433
144 Open Document Open Filing Mar 15, 2024
144 Open Document Open Filing Mar 14, 2024
4 Open Document Open Filing Mar 13, 2024 Mar 11, 2024 001-39460
144 Open Document Open Filing Mar 13, 2024
144 Open Document Open Filing Mar 12, 2024
144 Open Document Open Filing Mar 11, 2024
144 Open Document Open Filing Mar 5, 2024
SC 13G/A Open Document Open Filing SC 13G/A Feb 9, 2024
SC 13G/A Open Document Open Filing SC 13G/A Feb 9, 2024
SC 13D/A Open Document Open Filing SC 13D/A Jan 25, 2024
4 Open Document Open Filing FORM 4 SUBMISSION Jan 25, 2024 Jan 23, 2024 001-39438
144 Open Document Open Filing Jan 23, 2024
4 Open Document Open Filing FORM 4 SUBMISSION Jan 12, 2024 Jan 10, 2024 001-39438
144 Open Document Open Filing Jan 10, 2024
4 Open Document Open Filing FORM 4 SUBMISSION Dec 14, 2023 Dec 12, 2023 001-39438
144 Open Document Open Filing Dec 12, 2023
SC 13D/A Open Document Open Filing SC 13D/A Sep 21, 2023
4 Open Document Open Filing FORM 4 SUBMISSION Sep 18, 2023 Sep 14, 2023 001-39438
144 Open Document Open Filing Sep 15, 2023
SC 13D/A Open Document Open Filing SC 13D/A Sep 15, 2023
144 Open Document Open Filing Sep 14, 2023
4 Open Document Open Filing FORM 4 SUBMISSION Aug 16, 2023 Aug 14, 2023 001-39438
144 Open Document Open Filing Aug 15, 2023
144 Open Document Open Filing Aug 14, 2023
SC 13G/A Open Document Open Filing AMENDMENT TO FORM SC 13G Feb 14, 2023
SC 13D/A Open Document Open Filing AMENDMENT TO FORM SC 13D Feb 14, 2023
4 Open Document Open Filing FORM 4 SUBMISSION Jan 13, 2023 Jan 11, 2023 001-39460
4 Open Document Open Filing FORM 4 SUBMISSION Jan 3, 2023 Dec 29, 2022 001-39438
4 Open Document Open Filing FORM 4 SUBMISSION Dec 16, 2022 Dec 14, 2022 001-39460
SC 13D/A Open Document Open Filing AMENDMENT TO FORM SC 13D Dec 6, 2022
4 Open Document Open Filing FORM 4 SUBMISSION Nov 4, 2022 Nov 2, 2022 001-39460
4 Open Document Open Filing FORM 4 SUBMISSION Nov 1, 2022 Oct 28, 2022 001-39460
SC 13D/A Open Document Open Filing AMENDMENT TO FORM SC 13D Sep 14, 2022
SC 13D/A Open Document Open Filing AMENDMENT TO FORM SC 13D May 5, 2022
SC 13D Open Document Open Filing SCHEDULE 13D Feb 11, 2022
SC 13G/A Open Document Open Filing AMENDMENT TO SC 13G Feb 11, 2022
SC 13G/A Open Document Open Filing AMENDMENT TO SC 13G Feb 11, 2022
4 Open Document Open Filing FORM 4 SUBMISSION Sep 21, 2021 Sep 17, 2021 001-39319
4 Open Document Open Filing FORM 4 SUBMISSION Jun 21, 2021 Jun 16, 2021 001-39319
4 Open Document Open Filing FORM 4 SUBMISSION May 18, 2021 May 18, 2021 001-39460
4 Open Document Open Filing FORM 4 SUBMISSION Apr 1, 2021 Mar 30, 2021 001-40287
3 Open Document Open Filing FORM 3 SUBMISSION Mar 25, 2021 Mar 25, 2021 001-40287
4 Open Document Open Filing FORM 4 SUBMISSION Mar 18, 2021 Mar 16, 2021 001-39319
4 Open Document Open Filing FORM 4 SUBMISSION Feb 22, 2021 Feb 18, 2021 001-39460
SC 13D/A Open Document Open Filing AMENDED ACQUISITION OF BENEFICIAL OWNERSHIP Feb 17, 2021
4 Open Document Open Filing FORM 4 SUBMISSION Feb 16, 2021 Feb 11, 2021 001-38541
SC 13D/A Open Document Open Filing AMENDED ACQUISITION OF BENEFICIAL OWNERSHIP Feb 16, 2021
SC 13G Open Document Open Filing SCHEDULE FILED TO REPORT ACQUISITION OF BENEFICIAL OWNERSHIP Feb 16, 2021
SC 13G Open Document Open Filing SCHEDULE FILED TO REPORT ACQUISITION OF BENEFICIAL OWNERSHIP Feb 16, 2021
SC 13D Open Document Open Filing SCHEDULE 13D Feb 16, 2021
3 Open Document Open Filing Feb 11, 2021 Feb 5, 2021 001-39438
4 Open Document Open Filing FORM 4 SUBMISSION Dec 17, 2020 Dec 15, 2020 001-39319
SC 13D/A Open Document Open Filing AMENDMENT TO FORM SC 13D Sep 17, 2020
4 Open Document Open Filing FORM 4 SUBMISSION Sep 17, 2020 Sep 15, 2020 001-38596
4 Open Document Open Filing FORM 4 SUBMISSION Aug 25, 2020 Aug 25, 2020 001-39460
3 Open Document Open Filing FORM 3 SUBMISSION Aug 20, 2020 Aug 20, 2020 001-39460
SC 13D Open Document Open Filing ACQUISITION OF BENEFICIAL OWNERSHIP Jul 14, 2020
4 Open Document Open Filing FORM 4 SUBMISSION Jul 7, 2020 Jul 2, 2020 001-38596
SC 13D/A Open Document Open Filing AMENDMENT TO FORM SC 13D Jul 7, 2020
SC 13D/A Open Document Open Filing AMENDMENT TO FORM SC 13D Jun 19, 2020
4 Open Document Open Filing FORM 4 SUBMISSION Jun 18, 2020 Jun 16, 2020 001-39319
4 Open Document Open Filing FORM 4 SUBMISSION Jun 18, 2020 Jun 16, 2020 001-38596
3 Open Document Open Filing FORM 3 SUBMISSION Jun 11, 2020 Jun 11, 2020 001-39319
SC 13G/A Open Document Open Filing SC 13G/A Feb 13, 2020
SC 13D Open Document Open Filing SC 13D Nov 25, 2019
SC 13D Open Document Open Filing SCHEDULE 13D Jul 30, 2019
4/A Open Document Open Filing FORM 4/A SUBMISSION Jul 29, 2019 Jul 19, 2019 001-38537
4 Open Document Open Filing FORM 4 SUBMISSION Jul 23, 2019 Jul 19, 2019 001-38537
4 Open Document Open Filing FORM 4 SUBMISSION Mar 22, 2019 Mar 20, 2019 001-38541
4 Open Document Open Filing FORM 4 SUBMISSION Feb 14, 2019 Feb 12, 2019 001-38596
SC 13G Open Document Open Filing SCHEDULE 13G Feb 13, 2019
SC 13G Open Document Open Filing SCHEDULE 13G Feb 13, 2019
SC 13G Open Document Open Filing SCHEDULE 13G Feb 13, 2019
4 Open Document Open Filing 4 Jul 26, 2018 Jul 24, 2018 001-38596
3 Open Document Open Filing 3 Jul 19, 2018 Jul 19, 2018 001-38596
4 Open Document Open Filing FORM 4 SUBMISSION Jun 27, 2018 Jun 25, 2018 001-38541
4 Open Document Open Filing FORM 4 SUBMISSION Jun 25, 2018 Jun 25, 2018 001-38537
3 Open Document Open Filing FORM 3 SUBMISSION Jun 20, 2018 Jun 20, 2018 001-38541
3 Open Document Open Filing FORM 3 SUBMISSION Jun 20, 2018 Jun 20, 2018 001-38537
SC 13D Open Document Open Filing SC 13D Mar 14, 2018
D Open Document Open Filing Dec 18, 2014 021-230375