Koss Corporation
Koss Corporation (KOSS) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · KOSS · as of Sep 30, 2025
Ownership Breakdown
23
Institutional Holders
▲ 3 vs Q2
$2.75M
Total Inst. Value
▼ $14.45M vs Q2
9.47M
Shares Outstanding
freeFloat 58.08%
541,958
13F Shares Held
▼ 2.83M vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
KOSS largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
VANGUARD GROUP INC household audio & video equipment | 245.7K | 2.62% | 2.62% | $1.25B | Nov 7, 2025 | ▼ 802 |
BLACKROCK, INC. household audio & video equipment | 87.9K | 93.55% | 93.55% | $446.29M | Nov 12, 2025 | ▲ 313 |
GEODE CAPITAL MANAGEMENT, LLC household audio & video equipment | 58.4K | 62.23% | 62.23% | $296.92M | Nov 12, 2025 | ▲ 111 |
DIMENSIONAL FUND ADVISORS LP household audio & video equipment | 23.3K | 24.86% | 24.86% | $118.58M | Nov 12, 2025 | ▲ 12.7K |
STATE STREET CORP household audio & video equipment | 18.0K | 19.14% | 19.14% | $91.31M | Nov 14, 2025 | — held |
GOLDMAN SACHS GROUP INC household audio & video equipment | 17.0K | 18.11% | 18.11% | $86.39M | Nov 14, 2025 | NEW |
SUSQUEHANNA INTERNATIONAL GROUP, LLP household audio & video equipment | 14.6K | 15.50% | 15.50% | $73.95M | Nov 14, 2025 | NEW |
NORTHERN TRUST CORP household audio & video equipment | 14.4K | 15.36% | 15.36% | $73.26M | Nov 14, 2025 | ▼ 922 |
UBS GROUP AG household audio & video equipment | 13.6K | 14.49% | 14.49% | $69.12M | Nov 13, 2025 | ▲ 5.9K |
TWO SIGMA INVESTMENTS, LP household audio & video equipment | 13.4K | 14.22% | 14.22% | $67.84M | Nov 14, 2025 | NEW |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
5
Increased
+19.9K shares4
New Positions
first time holders6
Decreased
−3.8K shares2
Sold Out
fully exitedNet shares change (top 50)
+16.1K
+19.9K / −3.8K
Net new holders
+1
4 new / 2 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
KOSS insider trading · insider activity
Source: SEC Form 4
Insiders have been primarily selling shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
2
Buy transactions
0
Sell transactions
0.00
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Schulte Kim M. Chief Financial Officer | May 6, 2026 | Award | 50,000 | $4.30 | $215.0K | 50.0K | Form 4 ↗ |
Koss Michael J Jr Executive Vice President | May 6, 2026 | Award | 100,000 | $4.73 | $473.0K | 100.0K | Form 4 ↗ |
KOSS MICHAEL J President and CEO | Feb 17, 2026 | J-Other | 12,000 | — | — | 0 | Form 4 ↗ |
LILLIE LENORE director | Dec 2, 2025 | Purchase | 2,500 | $4.96 | $12.4K | 2.5K | Form 4 ↗ |
KOSS JOHN C JR Vice President - Sales | Jun 12, 2025 | Sale | 1,500 | $5.02 | $7.5K | 196.0K | Form 4 ↗ |
KOSS JOHN C JR Vice President - Sales | Jun 10, 2025 | Sale | 25,000 | $5.80 | $145.0K | 196.0K | Form 4 ↗ |
KOSS JOHN C JR Vice President - Sales | Jun 11, 2025 | Sale | 23,500 | $5.65 | $132.8K | 196.0K | Form 4 ↗ |
Koss Michael J Jr VP - Marketing & Product | Jun 12, 2025 | Sale | 6,000 | $4.91 | $29.5K | 26.0K | Form 4 ↗ |
Koss Michael J Jr VP - Marketing & Product | Jun 13, 2025 | Sale | 24,643 | $4.78 | $117.8K | 26.0K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Koss Corporation (KOSS) is primarily owned by institutional investors, who hold approximately 5.7% of total shares outstanding. Company insiders own approximately 41.92%, while retail and public investors account for the remaining 52.36%.
The largest institutional shareholder of Koss Corporation is VANGUARD GROUP INC, holding approximately 245,710 shares — equal to 2.62% of outstanding shares — as of September 30, 2025.
A total of 23 institutional investors currently hold KOSS stock, with a combined institutional value of approximately $2,753,073 as of the most recent 13F filing period.
Frequently asked questions
KOSS ownershipKoss Corporation (KOSS) is primarily owned by institutional investors, who hold approximately 5.7% of shares. The largest shareholder is VANGUARD GROUP INC with a 2.62% stake. Company insiders hold 41.92%. Data sourced from SEC Form 13F as of September 30, 2025.