Comparable stake leader
Michael J. Koss
SEC ownership of KOSS CORP
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0000056701.
Disclosed value leader
Michael J. Koss
Comparable rows
0/30
Latest evidence
06 May 2026
- Public ticker
- KOSS on Nasdaq
- Parsed ownership sources
- 3/4/5 and 13F
- Largest SEC-reported holder
- Michael J. Koss
- Latest parsed ownership date
- 06 May 2026
- Issuer CIK
- 0000056701
- Issuer location
- Milwaukee, WI
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
1 signal
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of KOSS CORP (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
Michael J. Koss
Disclosed value leader
Michael J. Koss
Comparable rows
0/30
Latest evidence
06 May 2026
3/4/5
13F
Highest disclosed value: $15,025,474
30 rows are not safely comparable across share classes.
Showing 1-8 of 30 holder rows.
Quick read
Michael J. Koss has the largest disclosed position value at $15.03M.
0 of 30 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Michael J. Koss's linked filing trail.
Disclosed position value
Top 5
Michael J. Koss
$15.03M
John C. Koss Jr.
$4.71M
VANGUARD CAPITAL MANAGEMENT LLC
$678.8K
BlackRock, Inc.
$320.8K
GEODE CAPITAL MANAGEMENT, LLC
$200.2K
Value bars compare disclosed positions; verify each figure against the linked filing evidence.
Detailed SEC evidence table Showing 1-8 of 30 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Michael J. Koss |
3/4/5
President and CEO, Director, 10%+ Owner
|
—
class O/S missing
|
$15,025,474
3,629,342 shares
|
— | 17 Feb 2026 |
| John C. Koss Jr. |
3/4/5
Vice President - Sales
|
—
class O/S missing
|
$4,713,981
809,502 shares
|
-$7,530 | 10 Jun 2025 |
| VANGUARD CAPITAL MANAGEMENT LLC |
13F
Company
|
—
class O/S missing
|
$678,793
189,607 shares
|
— | 31 Mar 2026 |
| BlackRock, Inc. |
13F
Company
|
—
class O/S missing
|
$320,771
89,601 shares
|
— | 31 Mar 2026 |
| GEODE CAPITAL MANAGEMENT, LLC |
13F
Company
|
—
class O/S missing
|
$200,202
55,913 shares
|
— | 31 Mar 2026 |
| William Jesse Sweasy |
3/4/5
Director
|
—
class O/S missing
|
$146,000
20,000 shares
|
— | 02 Jun 2022 |
| VANGUARD FIDUCIARY TRUST CO |
13F
Company
|
—
class O/S missing
|
$112,176
31,334 shares
|
— | 31 Mar 2026 |
| Michael J. Koss Jr. |
3/4/5
Executive Vice President
|
—
mixed-class rows
|
$93,122
160,369 shares
mixed-class rows
|
-$147,254 | 06 May 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to selling over the last 12 months. Net value: -$275,159.
Buys
$12,400
Insiders: 1
Sells
$287,559
Insiders: 2
Net
-$275,159
Shares: -53,143
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 2,500
Shares: 55,643
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 2,500 | 0 | $12,400 | $0 | +$12,400 |
| 9-12 | 0 | 55,643 | $0 | $287,559 | -$287,559 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-11 of 11 reporting-owner rows connected to KOSS CORP. Open a relationship link for the CIK-to-CIK filing trail.
Rows
11
Largest Forms 3/4/5 holder
Michael J. Koss
Net 12M change
-$142,384
Latest report
06 May 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Michael J. Koss | President and CEO, Director, 10%+ Owner | $15,025,474 | Mixed | 17 Feb 2026 | ||
| John C. Koss Jr. | Vice President - Sales | $4,713,981 | -$7,530 | -0.16% | Mixed | 10 Jun 2025 |
| William Jesse Sweasy | Director | $146,000 | Filing P/S | 02 Jun 2022 | ||
| Michael J. Koss Jr. | Executive Vice President | $93,122 | -$147,254 | -61% | Median | 06 May 2026 |
| Lenore Lillie | Director | $12,400 | +$12,400 | +100% | Filing P/S | 02 Dec 2025 |
| David D. Smith | Chief Financial Officer | $226 | Mixed | 02 Nov 2021 | ||
| Kim M. Schulte | Chief Financial Officer | Mixed | 06 May 2026 | |||
| Thomas L. Doerr | Director | Mixed | 18 May 2021 | |||
| KFT Corp | 10%+ Owner | Mixed | 23 Mar 2022 | |||
| Theodore Nixon | Director | Mixed | 28 May 2021 | |||
| Koss Family Trust, Dated 9/11/12 | 10%+ Owner | Mixed | 23 Mar 2022 |
Recent insider transactions for KOSS CORP
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Kim M. Schulte | KOSS | Stock Options (Right to Buy) | Award | 50,000 | 50,000 | 06 May 2026 | Direct | |||
| Michael J. Koss Jr. | KOSS | Stock Options (Right to Buy) | Award | 100,000 | 100,000 | 06 May 2026 | Direct | |||
| Michael J. Koss | KOSS | Common Stock | Other | -100% | -12,000 | 0 | 17 Feb 2026 | As co-trustee of trust for child | ||
| Lenore Lillie | KOSS | Common Stock | Purchase | $12,400 | $4.96 | 2,500 | 2,500 | 02 Dec 2025 | Direct | |
| Michael J. Koss Jr. | KOSS | Common Stock | Sale | -48.7% | $117,794 | $4.78 | -24,643 | 26,000 | 13 Jun 2025 | Direct |
| Michael J. Koss Jr. | KOSS | Common Stock | Options Exercise | 94.8% | 24,643 | 50,643 | 13 Jun 2025 | Direct | ||
| Michael J. Koss Jr. | KOSS | Stock Option (Right to Buy) | Options Exercise | -41.8% | -24,643 | 34,357 | 13 Jun 2025 | Direct | ||
| John C. Koss Jr. | KOSS | Common Stock | Sale | -0.76% | $7,530 | $5.02 | -1,500 | 196,028 | 12 Jun 2025 | Direct |
| John C. Koss Jr. | KOSS | Common Stock | Options Exercise | 0.77% | 1,500 | 197,528 | 12 Jun 2025 | Direct | ||
| John C. Koss Jr. | KOSS | Stock Option (Right to Buy) | Options Exercise | -100% | -1,500 | 0 | 12 Jun 2025 | Direct | ||
| Michael J. Koss Jr. | KOSS | Common Stock | Sale | -18.8% | $29,460 | $4.91 | -6,000 | 26,000 | 12 Jun 2025 | Direct |
| Michael J. Koss Jr. | KOSS | Common Stock | Options Exercise | 23.1% | 6,000 | 32,000 | 12 Jun 2025 | Direct | ||
| Michael J. Koss Jr. | KOSS | Stock Option (Right to Buy) | Options Exercise | -9.23% | -6,000 | 59,000 | 12 Jun 2025 | Direct | ||
| John C. Koss Jr. | KOSS | Common Stock | Sale | -10.7% | $132,775 | $5.65 | -23,500 | 196,028 | 11 Jun 2025 | Direct |
| John C. Koss Jr. | KOSS | Common Stock | Options Exercise | 12% | 23,500 | 219,528 | 11 Jun 2025 | Direct | ||
| John C. Koss Jr. | KOSS | Stock Option (Right to Buy) | Options Exercise | -94% | -23,500 | 1,500 | 11 Jun 2025 | Direct |
* marks a reported price that did not pass the local price check.