Constantin Ionel Stefan SEC EDGAR Filings (CIK 0001940928)

SEC EDGAR filings, ownership reports, and insider transactions for Constantin Ionel Stefan.

Business address
1180 Page Avenue, Fremont, CA, 94538
Top holdings (ownership)
AMPX
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Constantin Ionel Stefan has filed 29 SEC EDGAR filings since 16 Sep 2022

Latest Filings

Recent SEC filings for Constantin Ionel Stefan including 144, 4, 3.

Form type Document Filing Description Filing date Reporting date File number(s)
144 Open 144 document View SEC filing for 144 21 Jan 2026
4 Open 4 document View SEC filing for 4 FORM 4 15 Dec 2025 11 Dec 2025 001-41314
144 Open 144 document View SEC filing for 144 11 Dec 2025
4 Open 4 document View SEC filing for 4 FORM 4 25 Nov 2025 21 Nov 2025 001-41314
144 Open 144 document View SEC filing for 144 25 Nov 2025
4 Open 4 document View SEC filing for 4 FORM 4 25 Aug 2025 21 Aug 2025 001-41314
144 Open 144 document View SEC filing for 144 25 Aug 2025
4 Open 4 document View SEC filing for 4 FORM 4 23 May 2025 21 May 2025 001-41314
144 Open 144 document View SEC filing for 144 23 May 2025
4 Open 4 document View SEC filing for 4 FORM 4 21 Mar 2025 19 Mar 2025 001-41314
4 Open 4 document View SEC filing for 4 FORM 4 18 Mar 2025 14 Mar 2025 001-41314
4 Open 4 document View SEC filing for 4 FORM 4 24 Feb 2025 21 Feb 2025 001-41314
144 Open 144 document View SEC filing for 144 24 Feb 2025
4 Open 4 document View SEC filing for 4 FORM 4 22 Nov 2024 21 Nov 2024 001-41314
144 Open 144 document View SEC filing for 144 21 Nov 2024
4 Open 4 document View SEC filing for 4 FORM 4 25 Oct 2024 23 Oct 2024 001-41314
4 Open 4 document View SEC filing for 4 FORM 4 22 Aug 2024 21 Aug 2024 001-41314
144 Open 144 document View SEC filing for 144 22 Aug 2024
144 Open 144 document View SEC filing for 144 28 May 2024
4 Open 4 document View SEC filing for 4 FORM 4 24 May 2024 21 May 2024 001-41314
4 Open 4 document View SEC filing for 4 FORM 4 19 Mar 2024 19 Mar 2024 001-41314
4 Open 4 document View SEC filing for 4 FORM 4 18 Sep 2023 14 Sep 2023 001-41314
144 Open 144 document View SEC filing for 144 15 Sep 2023
144 Open 144 document View SEC filing for 144 14 Sep 2023
4 Open 4 document View SEC filing for 4 FORM 4 12 Sep 2023 09 Sep 2023 001-41314
4 Open 4 document View SEC filing for 4 FORM 4 03 May 2023 14 Dec 2022 001-41314
4 Open 4 document View SEC filing for 4 FORM 4 15 Dec 2022 14 Dec 2022 001-41314
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 16 Sep 2022 14 Sep 2022 001-41314
3 Open 3 document View SEC filing for 3 FORM 3 SUBMISSION 16 Sep 2022 14 Sep 2022 001-41314

About this filer

Constantin Ionel Stefan files with the SEC under CIK 0001940928. 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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