Filer Snapshot

John C. Koss Jr.

CIK 0001217521. SEC filing timeline plus parsed ownership intelligence from 13F, 13D/G, and Forms 3/4/5 where available.

Entity Type

Individual

Total Filings

40

Latest Filing

17 Jun 2025

Industry

n/a

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  • 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 Jun 2025 for CIK 0001217521.

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Business address
C/O Koss Corporation, 4129 N Port Washington Road, Milwaukee, WI, 53212
Top holdings (ownership)
KOSS

Filer intelligence

What SEC filings say about John C. Koss Jr.

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 KOSS worth $4.71M.

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 1 rows

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

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Forms 3/4/5 insider context

KOSS

10 Jun 2025 ยท Vice President - Sales

$4.71M
Issuer page Owner page

Latest update

What changed recently for John C. Koss Jr.

Ownership report updated

Latest ownership report period: 10 Jun 2025. Open the source-backed page to inspect the fresh filing or facts context.

Update date

17 Jun 2025

Page type

Ownership filings

Latest period

10 Jun 2025

Ownership context was refreshed from SEC Forms 3/4/5 filed on 17 Jun 2025.

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Filer Overview

John C. Koss Jr. has filed 40 SEC EDGAR filings since 24 Apr 2003. Common forms include 4, SC 13D/A, SC 13D.

John C. Koss Jr. SEC filings John C. Koss Jr. owner filings

Latest Filings

Recent SEC filings for John C. Koss Jr. with direct links to document and filing folders.

4 File 000-03295

4

Filing date
17 Jun 2025
Reporting date
10 Jun 2025
SEC evidence
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4 File 000-03295

4

Filing date
16 Dec 2024
Reporting date
12 Dec 2024
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4 File 000-03295

4

Filing date
21 May 2024
Reporting date
20 May 2024
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SC 13D/A

SC 13D/A filing

Filing date
03 Jun 2022
Reporting date
Not listed
SEC evidence
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4 File 000-03295

FORM 4 SUBMISSION

Filing date
03 Jun 2022
Reporting date
23 Mar 2022
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SC 13D/A

SC 13D/A filing

Filing date
08 Sep 2021
Reporting date
Not listed
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4 File 000-03295

FORM 4 SUBMISSION

Filing date
02 Sep 2021
Reporting date
31 Aug 2021
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4 File 000-03295

FORM 4 SUBMISSION

Filing date
31 Aug 2021
Reporting date
27 Aug 2021
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4 File 000-03295

FORM 4 SUBMISSION

Filing date
26 Aug 2021
Reporting date
24 Aug 2021
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4 File 000-03295

FORM 4 SUBMISSION

Filing date
16 Jun 2021
Reporting date
14 Jun 2021
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4 File 000-03295

FORM 4 SUBMISSION

Filing date
10 Jun 2021
Reporting date
08 Jun 2021
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4 File 000-03295

FORM 4 SUBMISSION

Filing date
03 Jun 2021
Reporting date
01 Jun 2021
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4 File 000-03295

FORM 4 SUBMISSION

Filing date
01 Jun 2021
Reporting date
28 May 2021
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SC 13D/A

SC 13D/A filing

Filing date
16 Mar 2021
Reporting date
Not listed
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4 File 000-03295

FORM 4 SUBMISSION

Filing date
12 Mar 2021
Reporting date
10 Mar 2021
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4 File 000-03295

FORM 4 SUBMISSION

Filing date
26 Feb 2021
Reporting date
25 Feb 2021
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SC 13D/A

SC 13D/A filing

Filing date
10 Feb 2021
Reporting date
Not listed
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4 File 000-03295

FORM 4 SUBMISSION

Filing date
05 Feb 2021
Reporting date
03 Feb 2021
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4 File 000-03295

FORM 4 SUBMISSION

Filing date
03 Feb 2021
Reporting date
01 Feb 2021
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4 File 000-03295

FORM 4 SUBMISSION

Filing date
23 Jul 2020
Reporting date
22 Jul 2020
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4 File 000-03295

FORM 4

Filing date
25 Jul 2019
Reporting date
24 Jul 2019
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4 File 000-03295

FORM 4

Filing date
27 Jul 2018
Reporting date
25 Jul 2018
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4 File 000-03295

FORM 4

Filing date
27 Jul 2017
Reporting date
26 Jul 2017
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4 File 000-03295

FORM 4

Filing date
28 Jul 2016
Reporting date
27 Jul 2016
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4 File 000-03295

FORM 4

Filing date
30 Jul 2015
Reporting date
29 Jul 2015
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4 File 000-03295

FORM 4

Filing date
25 Jul 2014
Reporting date
23 Jul 2014
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SC 13D

SC 13D filing

Filing date
15 Oct 2013
Reporting date
Not listed
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4 File 000-03295

FORM 4

Filing date
26 Jul 2013
Reporting date
20 Dec 2012
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4 File 000-03295

FORM 4

Filing date
25 Oct 2012
Reporting date
27 Jul 2011
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4 File 000-03295

7/15/2011 FORM 4

Filing date
18 Jul 2011
Reporting date
09 May 2007
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About this filer

John C. Koss Jr. files with the SEC under CIK 0001217521. 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.
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