KOSS
Koss CorpCompany with tickers: KOSS
CIK
56701
CUSIP
500692108
Shares Outstanding
9,466,438
13F Activity (30d)
19 filings
19 filers
Holders: 23
Total Value: $1,721,993
Total Shares: 481,007
Institutional Ownership Trend
Holder Concentration
Across 23 13F filers · Δ vs Dec 31, 2025Top Holder
39.4%
−6.3 pts
Top 5
80.7%
−4.1 pts
Top 10
96.1%
−0.1 pts
HHI
2,151
Moderately concentrated
−492
Quarterly Activity
vs Dec 31, 2025
New
5
Increased
4
Decreased
5
Sold Out
4
Unchanged
9
Holder count:
+1
Institutional value:
-14.6%
Shares held:
-1.3%
Top Buyers
vs Dec 31, 2025| Institution | Added | Now Holds | Open |
|---|---|---|---|
| Mid NewEdge Advisors, LLC | +4,900 | 15,475 | |
| Small JAMES INVESTMENT RESEARCH, INC. | +4,900 | 15,475 | |
| Mega BlackRock, Inc. | +1,196 | 89,601 | |
| Mid Tower Research Capital LLC (TRC) | +429 | 1,212 |
Top Sellers
vs Dec 31, 2025| Institution | Sold | Now Holds | Open |
|---|---|---|---|
| Mega GEODE CAPITAL MANAGEMENT, LLC | −4,429 | 55,913 | |
| Mega MORGAN STANLEY | −3,000 | 80 | |
| Mega UBS Group AG | −1,939 | 6,113 | |
| Mega DIMENSIONAL FUND ADVISORS LP | −1,731 | 21,611 | |
| Mid XTX Topco Ltd | −1,399 | 10,786 |
Top New Positions
vs Dec 31, 2025| Institution | Acquired | Value (USD) | Open |
|---|---|---|---|
| Mega VANGUARD CAPITAL MANAGEMENT LLC | 189,607 | $678,793 | |
| Mega VANGUARD FIDUCIARY TRUST CO | 31,334 | $112,175 | |
| Mega Vanguard Global Advisers, LLC | 2,040 | $7,303 | |
| Mid Parallel Advisors, LLC | 10 | $35 | |
| Mega CITIGROUP INC | 1 | $3 |
Top Sold-Out Positions
vs Dec 31, 2025| Institution | Previously Held | Last Value (USD) | Open |
|---|---|---|---|
| Mega VANGUARD GROUP INC | 222,991 | $923,181 | |
| Small SageView Advisory Group, LLC | 5,000 | $20,700 | |
| Mega BANK OF AMERICA CORP /DE/ | 208 | $861 | |
| Micro Fairway Wealth LLC | 34 | $140 |
| Holder | Value (USD) | % of 13F | Shares | Type | Discretion | Filed | Open | |||
|---|---|---|---|---|---|---|---|---|---|---|
| Mega VANGUARD CAPITAL MANAGEMENT LLC | $678,793 | 39.42% | 189,607 | Shares | Defined | 2026-05-15 | ||||
| Mega BlackRock, Inc. | $320,770 | 18.63% | 89,601 | Shares | Sole | 2026-05-13 | ||||
| Mega GEODE CAPITAL MANAGEMENT, LLC | $200,167 | 11.62% | 55,913 | Shares | Defined | 2026-05-15 | ||||
| Mega VANGUARD FIDUCIARY TRUST CO Bank | $112,175 | 6.51% | 31,334 | Shares | Defined | 2026-05-08 | ||||
| Mega DIMENSIONAL FUND ADVISORS LP | $77,367 | 4.49% | 21,611 | Shares | Sole | 2026-05-07 | ||||
| Mega STATE STREET CORP | $64,346 | 3.74% | 17,974 | Shares | Defined | 2026-05-15 | ||||
| Small JAMES INVESTMENT RESEARCH, INC. | $55,400 | 3.22% | 15,475 | Shares | Sole | 2026-04-24 | ||||
| Mid NewEdge Advisors, LLC | $55,400 | 3.22% | 15,475 | Shares | Sole | 2026-05-18 | ||||
| Mega NORTHERN TRUST CORP Bank | $51,140 | 2.97% | 14,285 | Shares | Defined | 2026-05-14 | ||||
| Mid XTX Topco Ltd | $38,613 | 2.24% | 10,786 | Shares | Defined | 2026-05-15 | ||||
| Mega PNC FINANCIAL SERVICES GROUP, INC. | $25,060 | 1.46% | 7,000 | Shares | Defined | 2026-05-08 | ||||
| Mega UBS Group AG | $21,884 | 1.27% | 6,113 | Shares | Defined | 2026-05-05 | ||||
| Mega Vanguard Global Advisers, LLC | $7,303 | 0.42% | 2,040 | Shares | Defined | 2026-05-08 | ||||
| Mid Tower Research Capital LLC (TRC) | $4,338 | 0.25% | 1,212 | Shares | Defined | 2026-05-15 | ||||
| Small N.E.W. Advisory Services LLC | $3,580 | 0.21% | 1,000 | Shares | Sole | 2026-05-05 | ||||
| Small Activest Wealth Management | $3,580 | 0.21% | 1,000 | Shares | Sole | 2026-04-15 | ||||
| Small CREATIVE FINANCIAL DESIGNS INC /ADV | $1,074 | 0.06% | 300 | Shares | Sole | 2026-04-13 | ||||
| Mid SBI Securities Co., Ltd. Broker-Dealer | $429 | 0.02% | 120 | Shares | Defined | 2026-04-28 | ||||
| Mega MORGAN STANLEY | $286 | 0.02% | 80 | Shares | Defined | 2026-05-15 | ||||
| Large OSAIC HOLDINGS, INC. | $179 | 0.01% | 50 | Shares | Defined | 2026-05-15 | ||||
| Small Crewe Advisors LLC | $71 | 0.00% | 20 | Shares | Sole | 2026-05-07 | ||||
| Mid Parallel Advisors, LLC | $35 | 0.00% | 10 | Shares | Sole | 2026-05-07 | ||||
| Mega CITIGROUP INC | $3 | 0.00% | 1 | Shares | Defined | 2026-05-11 | ||||
| No holders match your search. | ||||||||||