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.

Filer Snapshot

Diem Nguyen

CIK 0001814338. SEC filing timeline plus parsed ownership intelligence from 13F, 13D/G, and Forms 3/4/5 where available.

Entity Type

Individual

Total Filings

Latest Filing

17 Mar 2026

Industry

n/a

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Open 13F if you want portfolio holdings.
Open 13D/G or insider pages only when this CIK has those rows.

Open reporting owner context

Source: SEC Forms 3/4/5

4 filed on 17 Mar 2026 for CIK 0001814338.

View Source Filing

Business address: C/O Siga Technologies, Inc., 31 East 62 Nd Street, New York, NY, 10065
Top holdings (ownership): SIGA

Filer intelligence

What SEC filings say about Diem Nguyen

A compact read of parsed XML filings. 13F, 13D/G, and Forms 3/4/5 are shown separately because they answer different ownership questions.

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Quick read

Forms 3/4/5 show insider context for SIGA worth $2.86M.

SEC source mix

Counts show available parsed rows, not one combined ownership total.

XML parsed

13F portfolio No rows yet

Quarterly institutional portfolio holdings.

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13D/G stakes No rows yet

Beneficial ownership and large-stake disclosures.

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Forms 3/4/5 3 rows

Officer, director, and 10% owner holdings or transactions.

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Forms 3/4/5 insider context

SIGA

13 Mar 2026 · Chief Executive Officer

$2.86M

Issuer page Owner page

CADL

17 Jun 2025

Issuer page Owner page

VRCA

05 Jun 2025

Issuer page Owner page

Latest update

What changed recently for Diem Nguyen

Ownership report updated

Latest ownership report period: 13 Mar 2026. Open the source-backed page to inspect the fresh filing or facts context.

Update date

17 Mar 2026

Page type

Ownership filings

Latest period

13 Mar 2026

Ownership context was refreshed from SEC Forms 3/4/5 filed on 17 Mar 2026.

Open ownership filings Browse recent public updates

Filer Overview

Diem Nguyen has filed 23 SEC EDGAR filings since 11 Jun 2020. Common forms include 4, 3, 5/A, 5 and more.

Diem Nguyen SEC filings Diem Nguyen owner filings

Latest Filings

Recent SEC filings for Diem Nguyen with direct links to document and filing folders.

4 File 001-38436

4

Filing date: 17 Mar 2026
Reporting date: 13 Mar 2026
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38436

4

Filing date: 28 Jan 2026
Reporting date: 27 Jan 2026
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-40629

4

Filing date: 18 Jun 2025
Reporting date: 17 Jun 2025
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38529

4 filing

Filing date: 09 Jun 2025
Reporting date: 05 Jun 2025
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38436

4

Filing date: 14 Mar 2025
Reporting date: 13 Mar 2025
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38436

4

Filing date: 29 Jan 2025
Reporting date: 27 Jan 2025
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38436

4

Filing date: 29 Oct 2024
Reporting date: 25 Oct 2024
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-40629

4

Filing date: 27 Jun 2024
Reporting date: 26 Jun 2024
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38529

4 filing

Filing date: 07 Jun 2024
Reporting date: 06 Jun 2024
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38436

FORM 4 SUBMISSION

Filing date: 30 Jan 2024
Reporting date: 27 Jan 2024
SEC evidence: Open document Open filing
Next action: Verify source filing

3 File 001-38436

FORM 3 SUBMISSION

Filing date: 30 Jan 2024
Reporting date: 27 Jan 2024
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-40629

FORM 4 SUBMISSION

Filing date: 29 Jun 2023
Reporting date: 28 Jun 2023
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38529

FORM 4 SUBMISSION

Filing date: 12 Jun 2023
Reporting date: 08 Jun 2023
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-40629

FORM 4 SUBMISSION

Filing date: 17 Oct 2022
Reporting date: 13 Oct 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38529

FORM 4 SUBMISSION

Filing date: 13 Jun 2022
Reporting date: 09 Jun 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

5/A File 001-40629

FORM 5/A SUBMISSION

Filing date: 14 Feb 2022
Reporting date: 31 Dec 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

5 File 001-40629

FORM 5 SUBMISSION

Filing date: 14 Feb 2022
Reporting date: 31 Dec 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-40629

FORM 4 SUBMISSION

Filing date: 02 Aug 2021
Reporting date: 29 Jul 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

3 File 001-40629

FORM 3 SUBMISSION

Filing date: 26 Jul 2021
Reporting date: 26 Jul 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4/A File 001-38529

FORM 4/A SUBMISSION

Filing date: 17 Jun 2021
Reporting date: 10 Jun 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38529

FORM 4 SUBMISSION

Filing date: 14 Jun 2021
Reporting date: 10 Jun 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38529

FORM 4 SUBMISSION

Filing date: 11 Jun 2020
Reporting date: 09 Jun 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

3 File 001-38529

FORM 3 SUBMISSION

Filing date: 11 Jun 2020
Reporting date: 09 Jun 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

About this filer

Diem Nguyen files with the SEC under CIK 0001814338. This page aggregates EDGAR filings and related ownership activity.

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.

Diem Nguyen

Follow future filing-backed changes

What SEC filings say about Diem Nguyen

Quick read

SEC source mix

Forms 3/4/5 insider context

What changed recently for Diem Nguyen

Filer Overview

Latest Filings

4

4

4

4 filing

4

4

4

4

4 filing

FORM 4 SUBMISSION

FORM 3 SUBMISSION

FORM 4 SUBMISSION

FORM 4 SUBMISSION

FORM 4 SUBMISSION

FORM 4 SUBMISSION

FORM 5/A SUBMISSION

FORM 5 SUBMISSION

FORM 4 SUBMISSION

FORM 3 SUBMISSION

FORM 4/A SUBMISSION

FORM 4 SUBMISSION

FORM 4 SUBMISSION

FORM 3 SUBMISSION

About this filer

FAQ

Related pages for Diem Nguyen