Tzuo Tien SEC EDGAR Filings (CIK 0001735409)

SEC EDGAR filings, ownership reports, and insider transactions for Tzuo Tien.

Business address
C/O Amplitude, Inc., 201 Third Street, Suite 200, San Francisco, CA, 94103
Top holdings (ownership)
AMPL
Top holdings (Schedule 13D)
ZUO
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Tzuo Tien has filed 74 SEC EDGAR filings since 11 Apr 2018

Latest Filings

Recent SEC filings for Tzuo Tien including 4, 3, SCHEDULE 13D/A and more.

Form type Document Filing Description Filing date Reporting date File number(s)
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 07 Jan 2026 05 Jan 2026 001-40817
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 07 Oct 2025 05 Oct 2025 001-40817
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 08 Jul 2025 05 Jul 2025 001-40817
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 08 Apr 2025 05 Apr 2025 001-40817
4 Open 4 document View SEC filing for 4 4 25 Feb 2025 22 Feb 2025 001-40817
3 Open 3 document View SEC filing for 3 3 25 Feb 2025 22 Feb 2025 001-40817
SCHEDULE 13D/A Open SCHEDULE 13D/A document View SEC filing for SCHEDULE 13D/A 19 Feb 2025
4 Open 4 document View SEC filing for 4 FORM 4 14 Feb 2025 14 Feb 2025 001-38451
4 Open 4 document View SEC filing for 4 FORM 4 05 Feb 2025 03 Feb 2025 001-38451
4/A Open 4/A document View SEC filing for 4/A FORM 4/A 14 Jan 2025 31 Dec 2024 001-38451
4 Open 4 document View SEC filing for 4 FORM 4 03 Jan 2025 31 Dec 2024 001-38451
144 Open 144 document View SEC filing for 144 03 Jan 2025
SC 13D Open SC 13D document View SEC filing for SC 13D SC 13D 23 Oct 2024
4 Open 4 document View SEC filing for 4 FORM 4 03 Oct 2024 01 Oct 2024 001-38451
144 Open 144 document View SEC filing for 144 03 Oct 2024
4 Open 4 document View SEC filing for 4 FORM 4 02 Oct 2024 30 Sep 2024 001-38451
4 Open 4 document View SEC filing for 4 FORM 4 23 Jul 2024 19 Jul 2024 001-38451
4 Open 4 document View SEC filing for 4 FORM 4 17 Jul 2024 16 Jul 2024 001-38451
4 Open 4 document View SEC filing for 4 FORM 4 15 Jul 2024 11 Jul 2024 001-38451
4 Open 4 document View SEC filing for 4 FORM 4 10 Jul 2024 08 Jul 2024 001-38451
4 Open 4 document View SEC filing for 4 FORM 4 02 Jul 2024 30 Jun 2024 001-38451
144 Open 144 document View SEC filing for 144 01 Jul 2024
4 Open 4 document View SEC filing for 4 FORM 4 24 Apr 2024 22 Apr 2024 001-38451
4 Open 4 document View SEC filing for 4 FORM 4 19 Apr 2024 17 Apr 2024 001-38451
4 Open 4 document View SEC filing for 4 FORM 4 02 Apr 2024 31 Mar 2024 001-38451
144 Open 144 document View SEC filing for 144 01 Apr 2024
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SC 13G/A 08 Feb 2024
4 Open 4 document View SEC filing for 4 FORM 4 26 Jan 2024 25 Jan 2024 001-38451
4 Open 4 document View SEC filing for 4 FORM 4 24 Jan 2024 22 Jan 2024 001-38451
144 Open 144 document View SEC filing for 144 23 Jan 2024
4 Open 4 document View SEC filing for 4 FORM 4 03 Jan 2024 31 Dec 2023 001-38451
144 Open 144 document View SEC filing for 144 02 Jan 2024
4 Open 4 document View SEC filing for 4 FORM 4 07 Dec 2023 06 Dec 2023 001-38451
144 Open 144 document View SEC filing for 144 06 Dec 2023
4 Open 4 document View SEC filing for 4 FORM 4 03 Oct 2023 07 Sep 2023 001-38451
144 Open 144 document View SEC filing for 144 29 Sep 2023
4 Open 4 document View SEC filing for 4 FORM 4 05 Jul 2023 30 Jun 2023 001-38451
144 Open 144 document View SEC filing for 144 30 Jun 2023
4 Open 4 document View SEC filing for 4 FORM 4 28 Apr 2023 25 Apr 2023 001-38451
4 Open 4 document View SEC filing for 4 FORM 4 04 Apr 2023 31 Mar 2023 001-38451
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SC 13G/A 13 Feb 2023
4 Open 4 document View SEC filing for 4 FORM 4 04 Jan 2023 28 Jun 2022 001-38451
4 Open 4 document View SEC filing for 4 FORM 4 04 Oct 2022 30 Sep 2022 001-38451
4 Open 4 document View SEC filing for 4 FORM 4 21 Jul 2022 21 Jul 2022 001-32887
4 Open 4 document View SEC filing for 4 FORM 4 05 Jul 2022 30 Jun 2022 001-38451
4 Open 4 document View SEC filing for 4 FORM 4 09 Jun 2022 07 Jun 2022 001-38451
4 Open 4 document View SEC filing for 4 FORM 4 04 Apr 2022 31 Mar 2022 001-38451
4 Open 4 document View SEC filing for 4 FORM 4 21 Mar 2022 17 Mar 2022 001-38451
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SC 13G/A 10 Feb 2022
4 Open 4 document View SEC filing for 4 FORM 4 04 Jan 2022 31 Dec 2021 001-38451
4 Open 4 document View SEC filing for 4 FORM 4 08 Dec 2021 07 Dec 2021 001-38451
4 Open 4 document View SEC filing for 4 FORM 4 19 Oct 2021 15 Oct 2021 001-38451
4 Open 4 document View SEC filing for 4 FORM 4 05 Oct 2021 01 Oct 2021 001-32887
4 Open 4 document View SEC filing for 4 FORM 4 04 Oct 2021 30 Sep 2021 001-38451
4 Open 4 document View SEC filing for 4 FORM 4 01 Sep 2021 30 Aug 2021 001-38451
4 Open 4 document View SEC filing for 4 FORM 4 06 Jul 2021 01 Jul 2021 001-32887
4 Open 4 document View SEC filing for 4 FORM 4 03 Jun 2021 01 Jun 2021 001-38451
4 Open 4 document View SEC filing for 4 FORM 4 07 May 2021 05 May 2021 001-38451
4 Open 4 document View SEC filing for 4 FORM 4 15 Apr 2021 14 Apr 2021 001-38451
4 Open 4 document View SEC filing for 4 FORM 4 05 Apr 2021 01 Apr 2021 001-38451
4 Open 4 document View SEC filing for 4 FORM 4 05 Apr 2021 01 Apr 2021 001-32887
4 Open 4 document View SEC filing for 4 FORM 4 18 Mar 2021 16 Mar 2021 001-38451
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SC 13G/A 16 Feb 2021
4 Open 4 document View SEC filing for 4 FORM 4 26 Jan 2021 22 Jan 2021 001-38451
4 Open 4 document View SEC filing for 4 FORM 4 05 Jan 2021 01 Jan 2021 001-32887
3 Open 3 document View SEC filing for 3 FORM 3 20 Jul 2020 10 Jul 2020 001-32887
4 Open 4 document View SEC filing for 4 FORM 4 28 May 2020 27 May 2020 001-38451
5 Open 5 document View SEC filing for 5 FORM 5 11 Feb 2020 31 Jan 2020 001-38451
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SC 13G/A 10 Feb 2020
4 Open 4 document View SEC filing for 4 FORM 4 02 Jul 2019 07 May 2019 001-38451
5 Open 5 document View SEC filing for 5 FORM 5 14 Feb 2019 31 Jan 2019 001-38451
SC 13G Open SC 13G document View SEC filing for SC 13G SC 13G 13 Feb 2019
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 16 Apr 2018 16 Apr 2018 001-38451
3 Open 3 document View SEC filing for 3 FORM 3 SUBMISSION 11 Apr 2018 11 Apr 2018 001-38451

About this filer

Tzuo Tien files with the SEC under CIK 0001735409. 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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