24 institutions reported holding $2.0M of KOSS CORP (KOSS) in SEC 13F filings for 2026-06-30. Largest institutional holders: VANGUARD GROUP INC ($891,771), BlackRock, Inc. ($380,858), GEODE CAPITAL MANAGEMENT, LLC ($238,599), CITADEL ADVISORS LLC ($132,563), DIMENSIONAL FUND ADVISORS LP ($97,976). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | VANGUARD GROUP INC | $891,771 | 222,387 | Trimmed |
| 2 | BlackRock, Inc. | $380,858 | 94,977 | Added |
| 3 | GEODE CAPITAL MANAGEMENT, LLC | $238,599 | 59,491 | Added |
| 4 | CITADEL ADVISORS LLC | $132,563 | 33,058 | New |
| 5 | DIMENSIONAL FUND ADVISORS LP | $97,976 | 24,433 | Added |
| 6 | STATE STREET CORP | $72,076 | 17,974 | Hold |
| 7 | NewEdge Advisors, LLC | $62,055 | 15,475 | Hold |
| 8 | JAMES INVESTMENT RESEARCH, INC. | $62,055 | 15,475 | Hold |
| 9 | NORTHERN TRUST CORP | $41,251 | 10,287 | Trimmed |
| 10 | UBS Group AG | $8,666 | 2,161 | Trimmed |
| 11 | N.E.W. Advisory Services LLC | $4,010 | 1,000 | Hold |
| 12 | Activest Wealth Management | $4,010 | 1,000 | Hold |
| 13 | Tower Research Capital LLC (TRC) | $2,695 | 672 | Trimmed |
| 14 | CREATIVE FINANCIAL DESIGNS INC /ADV | $1,203 | 300 | Hold |
| 15 | SBI Securities Co., Ltd. | $481 | 120 | Hold |
| 16 | MORGAN STANLEY | $321 | 80 | Hold |
| 17 | OSAIC HOLDINGS, INC. | $200 | 50 | Hold |
| 18 | BARCLAYS PLC | $92 | 23 | New |
| 19 | Crewe Advisors LLC | $81 | 20 | Hold |
| 20 | Parallel Advisors, LLC | $36 | 9 | Trimmed |
| 21 | Caitong International Asset Management Co., Ltd | $8 | 2 | New |
| 22 | XTX Topco Ltd | $0 | 0 | Exited |
| 23 | PNC Financial Services Group, Inc. | $0 | 0 | Exited |
| 24 | CITIGROUP INC | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-06-30