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About 35.7% of KOSS shares are held by financial institutions. GOLDMAN SACHS GROUP INC is the top corporate investor, holding 0 shares valued at -. A 0% stake in Koss Corporation is owned by the company. ROYAL BANK OF CANADA owns 0 shares valued at -, which translates its holding of 0% of the stake in the company.
| Date | Holder | % Stake | Shares Held | Total Value ($) | Shares | % Change in Portfolio |
|---|---|---|---|---|---|---|
| Dec 31, 2025 | GOLDMAN SACHS GROUP INC | 0% | 0 | - | -17.01K | -100.00% |
| Dec 31, 2025 | ROYAL BANK OF CANADA | 0% | 0 | - | -1.02K | -100.00% |
| Dec 31, 2025 | TWO SIGMA INVESTMENTS, LP | 0% | 0 | - | -13.36K | -100.00% |
| Dec 31, 2025 | VANGUARD GROUP INC | 2.36% | 222.99K | 923.18K | -22.72K | -9.25% |
| Dec 31, 2025 | GEODE CAPITAL MANAGEMENT, LLC | 0.64% | 60.34K | 249.85K | 1.9K | +3.26% |
| Dec 31, 2025 | BLACKROCK, INC. | 0.93% | 88.41K | 366K | 552 | +0.63% |
| Dec 31, 2025 | DIMENSIONAL FUND ADVISORS LP | 0.25% | 23.34K | 96.64K | 0 | 0 |
| Dec 31, 2025 | STATE STREET CORP | 0.19% | 17.97K | 74.41K | 0 | 0 |
| Dec 31, 2025 | JAMES INVESTMENT RESEARCH INC | 0.11% | 10.58K | 43.78K | 0 | 0 |
| Dec 31, 2025 | UBS GROUP AG | 0.09% | 8.05K | 33.34K | -5.56K | -40.82% |
| Dec 31, 2025 | PNC FINANCIAL SERVICES GROUP, INC. | 0.07% | 7K | 28.98K | 0 | 0 |
| Dec 31, 2025 | MORGAN STANLEY | 0.03% | 3.08K | 12.75K | 0 | 0 |
| Dec 31, 2025 | N.E.W. ADVISORY SERVICES LLC | 0.01% | 1K | 4.14K | 1K | +100.00% |
| Dec 31, 2025 | ACTIVEST WEALTH MANAGEMENT | 0.01% | 1K | 4.14K | 0 | 0 |
| Dec 31, 2025 | CREATIVE FINANCIAL DESIGNS INC /ADV | 0% | 300 | 1.24K | 0 | 0 |
| Dec 31, 2025 | SBI SECURITIES CO., LTD. | 0% | 120 | 497 | 0 | 0 |
| Dec 31, 2025 | FAIRWAY WEALTH LLC | 0% | 34 | 141 | 34 | +100.00% |
| Dec 31, 2025 | CREWE ADVISORS LLC | 0% | 20 | 83 | 0 | 0 |
| Dec 31, 2025 | CITIGROUP INC | 0% | 0 | - | -978 | -100.00% |
| Dec 31, 2025 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 0% | 0 | - | -14.56K | -100.00% |
| Sep 30, 2025 | TWO SIGMA INVESTMENTS, LP | 0.14% | 13.36K | 67.84K | 13.36K | +100.00% |
| Sep 30, 2025 | UBS GROUP AG | 0.14% | 13.61K | 69.12K | 5.86K | +75.60% |
| Sep 30, 2025 | NORTHERN TRUST CORP | 0.15% | 14.42K | 73.26K | -922 | -6.01% |
| Sep 30, 2025 | CREATIVE FINANCIAL DESIGNS INC /ADV | 0% | 300 | 1.52K | 0 | 0 |
| Sep 30, 2025 | STATE STREET CORP | 0.19% | 17.97K | 91.31K | 0 | 0 |
| Sep 30, 2025 | BANK OF AMERICA CORP /DE/ | 0% | 302 | 1.53K | -48 | -13.71% |
| Sep 30, 2025 | ACTIVEST WEALTH MANAGEMENT | 0.01% | 1K | 5.08K | 0 | 0 |
| Sep 30, 2025 | ROYAL BANK OF CANADA | 0.01% | 1.02K | 5K | -425 | -29.43% |
| Sep 30, 2025 | MORGAN STANLEY | 0.03% | 3.08K | 15.65K | -1.61K | -34.37% |
| Sep 30, 2025 | PNC FINANCIAL SERVICES GROUP, INC. | 0.07% | 7K | 35.56K | 0 | 0 |
| Sep 30, 2025 | LIDO ADVISORS, LLC | 0% | 0 | - | -2.89M | -100.00% |
| Sep 30, 2025 | BANGOR SAVINGS BANK | 0% | 0 | - | -150 | -100.00% |
| Sep 30, 2025 | VANGUARD GROUP INC | 2.62% | 245.71K | 1.25M | -802 | -0.33% |
| Sep 30, 2025 | TOWER RESEARCH CAPITAL LLC (TRC) | 0.01% | 673 | 3.42K | 673 | +100.00% |
| Sep 30, 2025 | CREWE ADVISORS LLC | 0% | 20 | 102 | 0 | 0 |
| Sep 30, 2025 | NEWEDGE ADVISORS, LLC | 0.11% | 10.58K | 53.72K | 0 | 0 |
| Sep 30, 2025 | JAMES INVESTMENT RESEARCH INC | 0.11% | 10.58K | 53.72K | 0 | 0 |
| Sep 30, 2025 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 0.16% | 14.56K | 73.96K | 14.56K | +100.00% |
| Sep 30, 2025 | GOLDMAN SACHS GROUP INC | 0.18% | 17.01K | 86.39K | 17.01K | +100.00% |
| Sep 30, 2025 | DIMENSIONAL FUND ADVISORS LP | 0.25% | 23.34K | 118.58K | 12.66K | +118.54% |
| Sep 30, 2025 | GEODE CAPITAL MANAGEMENT, LLC | 0.62% | 58.44K | 296.92K | 111 | +0.19% |
| Sep 30, 2025 | BLACKROCK, INC. | 0.94% | 87.85K | 446.29K | 313 | +0.36% |
| Sep 30, 2025 | ADVISOR GROUP HOLDINGS, INC. | 0% | 50 | 310 | 0 | 0 |
| Sep 30, 2025 | SBI SECURITIES CO., LTD. | 0% | 120 | 610 | -1 | -0.83% |
| Sep 30, 2025 | CITIGROUP INC | 0.01% | 978 | 4.97K | 978 | +100.00% |
| Jun 30, 2025 | JAMES INVESTMENT RESEARCH INC | 0.11% | 10.58K | 53.93K | 0 | 0 |
| Jun 30, 2025 | DIMENSIONAL FUND ADVISORS LP | 0.11% | 10.68K | 54.47K | 10.68K | +100.00% |
| Jun 30, 2025 | NORTHERN TRUST CORP | 0.16% | 15.34K | 78.25K | 3.23K | +26.63% |
| Jun 30, 2025 | STATE STREET CORP | 0.19% | 17.97K | 91.67K | 0 | 0 |
| Jun 30, 2025 | GEODE CAPITAL MANAGEMENT, LLC | 0.62% | 58.33K | 297.52K | -2.31K | -3.81% |
| Jun 30, 2025 | VANGUARD GROUP INC | 2.63% | 246.51K | 1.26M | -6.24K | -2.47% |
| Jun 30, 2025 | ROYAL BANK OF CANADA | 0.02% | 1.44K | 7K | 776 | +116.17% |
| Jun 30, 2025 | MORGAN STANLEY | 0.05% | 4.69K | 23.93K | 1.61K | +52.37% |
| Jun 30, 2025 | GUARDIAN WEALTH MANAGEMENT, INC. | 0% | 0 | - | -7 | -100.00% |
| Jun 30, 2025 | CITIGROUP INC | 0% | 0 | - | -28 | -100.00% |
| Jun 30, 2025 | CREATIVE FINANCIAL DESIGNS INC /ADV | 0% | 300 | 1.53K | 0 | 0 |
| Jun 30, 2025 | PNC FINANCIAL SERVICES GROUP, INC. | 0.07% | 7K | 35.7K | 0 | 0 |
| Jun 30, 2025 | BANK OF AMERICA CORP /DE/ | 0% | 350 | 1.79K | 204 | +139.73% |
| Jun 30, 2025 | ADVISOR GROUP HOLDINGS, INC. | 0% | 50 | 255 | 0 | 0 |
| Jun 30, 2025 | CREWE ADVISORS LLC | 0% | 20 | 102 | 0 | 0 |
| Jun 30, 2025 | LIDO ADVISORS, LLC | 30.85% | 2.89M | 14.75M | 0 | 0 |
| Jun 30, 2025 | PSI ADVISORS, LLC | 0% | 0 | - | -20 | -100.00% |
| Jun 30, 2025 | N.E.W. ADVISORY SERVICES LLC | 0% | 0 | - | -2K | -100.00% |
| Jun 30, 2025 | 0% | 121 | 617 | 0 | 0 | |
| Jun 30, 2025 | BLACKROCK, INC. | 0.93% | 87.54K | 446.46K | 12.77K | +17.09% |
| Jun 30, 2025 | BANGOR SAVINGS BANK | 0% | 150 | 765 | 150 | +100.00% |
| Jun 30, 2025 | ACTIVEST WEALTH MANAGEMENT | 0.01% | 1K | 5.1K | 0 | 0 |
| Jun 30, 2025 | NEWEDGE ADVISORS, LLC | 0.11% | 10.58K | 53.93K | 0 | 0 |
| Jun 30, 2025 | SBI SECURITIES CO., LTD. | 0% | 121 | 617 | 0 | 0 |
| Jun 30, 2025 | UBS GROUP AG | 0.08% | 7.75K | 39.52K | 57 | +0.74% |
| Mar 31, 2025 | BNP PARIBAS ARBITRAGE, SNC | 0% | 0 | - | -24 | -100.00% |
| Mar 31, 2025 | ROYAL BANK OF CANADA | 0.01% | 668 | 3K | -62 | -8.49% |
| Mar 31, 2025 | CREATIVE FINANCIAL DESIGNS INC /ADV | 0% | 300 | 1.42K | 0 | 0 |
| Mar 31, 2025 | BANK OF AMERICA CORP /DE/ | 0% | 146 | 689 | 103 | +239.53% |
| Mar 31, 2025 | GEODE CAPITAL MANAGEMENT, LLC | 0.65% | 60.64K | 286.26K | 480 | +0.80% |
| Mar 31, 2025 | STATE STREET CORP | 0.19% | 17.97K | 84.84K | 0 | 0 |
| Mar 31, 2025 | NORTHERN TRUST CORP | 0.13% | 12.12K | 57.19K | -47 | -0.39% |
| Mar 31, 2025 | N.E.W. ADVISORY SERVICES LLC | 0.02% | 2K | 9.44K | 2K | +100.00% |
| Mar 31, 2025 | ACTIVEST WEALTH MANAGEMENT | 0.01% | 1K | 4.72K | 0 | 0 |
| Mar 31, 2025 | ADVISOR GROUP HOLDINGS, INC. | 0% | 50 | 236 | 0 | 0 |
| Mar 31, 2025 | CITIGROUP INC | 0% | 28 | 132 | 28 | +100.00% |
| Mar 31, 2025 | CREWE ADVISORS LLC | 0% | 20 | 95 | 0 | 0 |
| Mar 31, 2025 | LIDO ADVISORS, LLC | 30.85% | 2.89M | 13.65M | 2.89M | +100.00% |
| Mar 31, 2025 | VANGUARD GROUP INC | 2.7% | 252.75K | 1.19M | 1.81K | +0.72% |
| Mar 31, 2025 | MARSHALL WACE, LLP | 0% | 0 | - | -60.58K | -100.00% |
| Mar 31, 2025 | JAMES INVESTMENT RESEARCH INC | 0.11% | 10.58K | 49.91K | 0 | 0 |
| Mar 31, 2025 | NEWEDGE ADVISORS, LLC | 0.11% | 10.58K | 49.91K | 0 | 0 |
| Mar 31, 2025 | UBS GROUP AG | 0.08% | 7.69K | 36.31K | 3.77K | +96.27% |
| Mar 31, 2025 | PNC FINANCIAL SERVICES GROUP, INC. | 0.07% | 7K | 33.04K | 0 | 0 |
| Mar 31, 2025 | PSI ADVISORS, LLC | 0% | 20 | 94 | 0 | 0 |
| Mar 31, 2025 | BLACKROCK, INC. | 0.8% | 74.77K | 352.9K | -740 | -0.98% |
| Mar 31, 2025 | MORGAN STANLEY | 0.03% | 3.08K | 14.54K | 1K | +48.08% |
| Mar 31, 2025 | GUARDIAN WEALTH MANAGEMENT, INC. | 0% | 7 | 33 | 1 | +16.67% |
| Mar 31, 2025 | CITADEL ADVISORS LLC | 0% | 0 | - | -28.73K | -100.00% |
| Mar 31, 2025 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 0% | 0 | - | -13.92K | -100.00% |
| Mar 31, 2025 | VIRTU FINANCIAL LLC | 0% | 0 | - | -12.4K | -100.00% |
| Mar 31, 2025 | JANE STREET GROUP, LLC | 0% | 0 | - | -16.98K | -100.00% |
| Mar 31, 2025 | NELSON, VAN DENBURG & CAMPBELL WEALTH MANAGEMENT GROUP, LLC | 0% | 0 | - | -7 | -100.00% |
| Mar 31, 2025 | 0% | 0 | - | -1K | -100.00% | |
| Mar 31, 2024 | WELLS FARGO & COMPANY/MN | 0% | 41 | 105 | 1 | +2.50% |
| Mar 31, 2024 | JPMORGAN CHASE & CO | 0% | 11 | 28 | 4 | +57.14% |
| Mar 31, 2024 | NORTH STAR INVESTMENT MANAGEMENT CORP. | 0% | 60 | 154 | 60 | +100.00% |
| Mar 31, 2024 | DIMENSIONAL FUND ADVISORS LP | 1.47% | 136.15K | 349.89K | -360 | -0.26% |
| Mar 31, 2024 | VANGUARD GROUP INC | 2.84% | 262.51K | 674.64K | 0 | 0 |
| Mar 31, 2024 | UBS GROUP AG | 0% | 0 | - | -5.05K | -100.00% |
| Mar 31, 2024 | BANK OF AMERICA CORP /DE/ | 0% | 0 | - | -3 | -100.00% |
| Mar 31, 2024 | BNP PARIBAS ARBITRAGE, SNC | 0% | 6 | 15 | 0 | 0 |
| Mar 31, 2024 | NELSON, VAN DENBURG & CAMPBELL WEALTH MANAGEMENT GROUP, LLC | 0% | 7 | 17 | 0 | 0 |
| Mar 31, 2024 | FMR LLC | 0% | 27 | 68 | 27 | +100.00% |
| Mar 31, 2024 | STEWARD PARTNERS INVESTMENT ADVISORY, LLC | 0% | 49 | 126 | 0 | 0 |
| Mar 31, 2024 | ADVISOR GROUP HOLDINGS, INC. | 0% | 116 | 298 | 0 | 0 |
| Mar 31, 2024 | CREATIVE FINANCIAL DESIGNS INC /ADV | 0% | 300 | 771 | 0 | 0 |
| Mar 31, 2024 | TOWER RESEARCH CAPITAL LLC (TRC) | 0.03% | 2.48K | 6.38K | 1.68K | +208.97% |
| Mar 31, 2024 | PNC FINANCIAL SERVICES GROUP, INC. | 0.08% | 7K | 17.99K | 0 | 0 |
| Mar 31, 2024 | NORTHERN TRUST CORP | 0.13% | 12.31K | 31.64K | 0 | 0 |
| Mar 31, 2024 | QUBE RESEARCH & TECHNOLOGIES LTD | 0% | 50 | 129 | 0 | 0 |
| Mar 31, 2024 | CITADEL ADVISORS LLC | 0.16% | 14.62K | 37.57K | 14.62K | +100.00% |
| Mar 31, 2024 | STATE STREET CORP | 0.19% | 17.97K | 46.19K | 0 | 0 |
| Mar 31, 2024 | RENAISSANCE TECHNOLOGIES LLC | 0.25% | 22.66K | 58K | 9.56K | +72.98% |
| Mar 31, 2024 | GEODE CAPITAL MANAGEMENT, LLC | 0.64% | 59.47K | 152.85K | 0 | 0 |
| Mar 31, 2024 | BLACKROCK INC. | 0.67% | 61.89K | 159.06K | -641 | -1.03% |
| Dec 31, 2023 | GEODE CAPITAL MANAGEMENT, LLC | 0.64% | 59.47K | 199.24K | 0 | 0 |
| Dec 31, 2023 | BLACKROCK INC. | 0.68% | 62.53K | 209.48K | -120 | -0.19% |
| Dec 31, 2023 | VANGUARD GROUP INC | 2.84% | 262.51K | 879.4K | 3.49K | +1.35% |
| Dec 31, 2023 | IAG WEALTH PARTNERS, LLC | 0% | 0 | - | -1K | -100.00% |
| Dec 31, 2023 | ROYAL BANK OF CANADA | 0% | 0 | - | -1.73K | -100.00% |
| Dec 31, 2023 | BANK OF AMERICA CORP /DE/ | 0% | 3 | 10 | 3 | +100.00% |
| Dec 31, 2023 | BNP PARIBAS ARBITRAGE, SNC | 0% | 6 | 20 | 0 | 0 |
| Dec 31, 2023 | NELSON, VAN DENBURG & CAMPBELL WEALTH MANAGEMENT GROUP, LLC | 0% | 7 | 23 | 0 | 0 |
| Dec 31, 2023 | JPMORGAN CHASE & CO | 0% | 7 | 23 | 2 | +40.00% |
| Dec 31, 2023 | DIMENSIONAL FUND ADVISORS LP | 1.48% | 136.51K | 457.29K | 2.51K | +1.88% |
| Dec 31, 2023 | WELLS FARGO & COMPANY/MN | 0% | 40 | 134 | 2 | +5.26% |
| Dec 31, 2023 | STEWARD PARTNERS INVESTMENT ADVISORY, LLC | 0% | 49 | 164 | 0 | 0 |
| Dec 31, 2023 | QUBE RESEARCH & TECHNOLOGIES LTD | 0% | 50 | 168 | 0 | 0 |
| Dec 31, 2023 | ADVISOR GROUP HOLDINGS, INC. | 0% | 116 | 388 | 0 | 0 |
| Dec 31, 2023 | CREATIVE FINANCIAL DESIGNS INC /ADV | 0% | 300 | 1.01K | 0 | 0 |
| Dec 31, 2023 | TOWER RESEARCH CAPITAL LLC (TRC) | 0.01% | 803 | 2.69K | 219 | +37.50% |
| Dec 31, 2023 | UBS GROUP AG | 0.05% | 5.05K | 16.91K | 5.05K | +504,700.00% |
| Dec 31, 2023 | PNC FINANCIAL SERVICES GROUP, INC. | 0.08% | 7K | 23.45K | 0 | 0 |
| Dec 31, 2023 | NORTHERN TRUST CORP | 0.13% | 12.31K | 41.25K | -3.66K | -22.90% |
| Dec 31, 2023 | RENAISSANCE TECHNOLOGIES LLC | 0.14% | 13.1K | 44K | 2.5K | +23.58% |
| Dec 31, 2023 | STATE STREET CORP | 0.19% | 17.97K | 60.21K | 0 | 0 |
Among the KOSS insiders holding of 43.57% of the stake in company, KOSS MICHAEL J, President and CEO, holds the largest shares of 774.91K. NANCY KOSS 2012 TRUST, DATED 12/20/12, 10 percent owner, is the second largest KOSS insider with ownership of 757.95K shares. KOSS JOHN C JR, Vice President - Sales, stands third with possession of 196.03K shares of that stake.
| Insiders | Designation | Shares Held |
|---|---|---|
| KOSS MICHAEL J | President and CEO | 774.91K |
| NANCY KOSS 2012 TRUST, DATED 12/20/12 | 10 percent owner | 757.95K |
| KOSS JOHN C JR | Vice President - Sales | 196.03K |
| KOSS MICHAEL J JR | VP - Marketing & Product | 26K |
| SWEASY WILLIAM JESSE | 20K | |
| LILLIE LENORE | director | 2.5K |
| NIXON THEODORE | director | 0 |
| LEVEEN STEVEN A | director | 0 |
| SMITH DAVID DONNAN | Chief Financial Officer | 0 |
| DOERR THOMAS L. | director | 0 |
| Date | Insider | Type | Cost | Shares | Value ($) | Shares Total |
|---|---|---|---|---|---|---|
| Dec 02, 2025 | LILLIE LENORE | PURCHASE | 4.96 | 2.5K | 12.4K | 2.5K |
| Jun 13, 2025 | KOSS MICHAEL J JR | SALE | 4.78 | 24.64K | 117.79K | 26K |
| Jun 12, 2025 | KOSS MICHAEL J JR | SALE | 4.91 | 6K | 29.46K | 26K |
| Jun 12, 2025 | KOSS JOHN C JR | SALE | 5.02 | 1.5K | 7.53K | 196.03K |
| Jun 11, 2025 | KOSS JOHN C JR | SALE | 5.65 | 23.5K | 132.78K | 196.03K |
| Jun 10, 2025 | KOSS JOHN C JR | SALE | 5.80 | 25K | 145K | 196.03K |
| Dec 12, 2024 | KOSS JOHN C JR | SALE | 7.39 | 25K | 184.73K | 196.03K |
| May 20, 2024 | KOSS JOHN C JR | SALE | 5.25 | 25K | 131.25K | 196.03K |
| Jun 02, 2022 | SWEASY WILLIAM JESSE | PURCHASE | 7.30 | 2.85K | 20.78K | 20K |
| Jun 01, 2022 | SWEASY WILLIAM JESSE | PURCHASE | 6.96 | 17.15K | 119.38K | 17.15K |
| Nov 02, 2021 | SMITH DAVID DONNAN | SALE | 15.54 | 10K | 155.4K | 0 |
| Sep 15, 2021 | KOSS MICHAEL J JR | SALE | 17.74 | 24.09K | 427.34K | 26K |
| Sep 01, 2021 | KOSS MICHAEL J | SALE | 18.75 | 780 | 14.63K | 774.91K |
| Aug 31, 2021 | KOSS JOHN C JR | SALE | 18.38 | 10K | 183.8K | 151.03K |
| Aug 31, 2021 | KOSS MICHAEL J | SALE | 18.51 | 9.22K | 170.66K | 774.91K |
| Aug 30, 2021 | KOSS JOHN C JR | SALE | 18.26 | 5K | 91.3K | 151.03K |
| Aug 30, 2021 | KOSS MICHAEL J | SALE | 18.28 | 5.4K | 98.71K | 774.91K |
| Aug 27, 2021 | KOSS JOHN C JR | SALE | 18.06 | 10K | 180.6K | 151.03K |
| Aug 27, 2021 | KOSS MICHAEL J | SALE | 18.06 | 4.6K | 83.08K | 774.91K |
| Aug 26, 2021 | KOSS MICHAEL J | SALE | 18.33 | 8.5K | 155.81K | 774.91K |
| Aug 25, 2021 | KOSS MICHAEL J JR | SALE | 18.01 | 30K | 540.3K | 26K |
| Aug 24, 2021 | SMITH DAVID DONNAN | SALE | 17.64 | 110K | 1.94M | 0 |
| Aug 24, 2021 | KOSS JOHN C JR | SALE | 20.06 | 25K | 501.5K | 151.03K |
| Aug 24, 2021 | KOSS MICHAEL J | SALE | 19.74 | 16.5K | 325.71K | 774.91K |
| Jul 01, 2021 | LILLIE LENORE | SALE | 22.27 | 15K | 334.05K | 0 |
| Jul 01, 2021 | SMITH DAVID DONNAN | SALE | 23.00 | 7.5K | 172.5K | 0 |
| Jun 15, 2021 | KOSS MICHAEL J JR | SALE | 24.30 | 10K | 243K | 26K |
| Jun 15, 2021 | KOSS JOHN C JR | SALE | 24.22 | 5K | 121.1K | 151.03K |
| Jun 14, 2021 | KOSS JOHN C JR | SALE | 25.20 | 3K | 75.6K | 156.03K |
| Jun 09, 2021 | KOSS JOHN C JR | SALE | 27.00 | 5K | 135K | 159.03K |
| Jun 08, 2021 | KOSS JOHN C JR | SALE | 30.00 | 8.13K | 243.99K | 164.03K |
| Jun 03, 2021 | KOSS JOHN C JR | SALE | 35.36 | 5K | 176.8K | 172.16K |
| Jun 02, 2021 | KOSS MICHAEL J JR | SALE | 40.51 | 10K | 405.1K | 36K |
| Jun 02, 2021 | KOSS MICHAEL J | SALE | 43.00 | 5K | 215K | 27K |
| Jun 02, 2021 | KOSS JOHN C JR | SALE | 28.00 | 5K | 140K | 192.16K |
| Jun 01, 2021 | KOSS MICHAEL J | SALE | 25.04 | 11.78K | 294.95K | 774.91K |
| Jun 01, 2021 | KOSS JOHN C JR | SALE | 25.00 | 5K | 125K | 197.16K |
| May 28, 2021 | KOSS JOHN C JR | SALE | 23.50 | 10K | 235K | 202.16K |
| May 28, 2021 | NIXON THEODORE | SALE | 23.58 | 10K | 235.8K | 0 |
| May 26, 2021 | KOSS MICHAEL J | SALE | 21.26 | 9K | 191.34K | 774.91K |
| May 18, 2021 | DOERR THOMAS L. | SALE | 18.83 | 3.33K | 62.76K | 0 |
| Apr 01, 2021 | SMITH DAVID DONNAN | SALE | 24.24 | 5.5K | 133.32K | 0 |
| Apr 01, 2021 | LILLIE LENORE | SALE | 22.12 | 4.5K | 99.54K | 0 |
| Mar 12, 2021 | KOSS MICHAEL J | SALE | 29.99 | 4.12K | 123.62K | 37K |
| Mar 10, 2021 | KOSS JOHN C JR | SALE | 36.72 | 4K | 146.88K | 217.16K |
| Mar 10, 2021 | KOSS MICHAEL J | SALE | 38.05 | 10K | 380.5K | 41.12K |
| Mar 01, 2021 | LILLIE LENORE | SALE | 16.50 | 22.45K | 370.43K | 0 |
| Mar 01, 2021 | SMITH DAVID DONNAN | SALE | 17.01 | 1K | 17.01K | 0 |
| Feb 25, 2021 | KOSS MICHAEL J JR | SALE | 32.89 | 11K | 361.79K | 46K |
| Feb 25, 2021 | KOSS JOHN C JR | SALE | 30.13 | 10K | 301.3K | 256.16K |
| Feb 25, 2021 | KOSS MICHAEL J | SALE | 32.50 | 10K | 325K | 55.12K |
| Feb 04, 2021 | KOSS JOHN C JR | SALE | 24.00 | 5K | 120K | 266.16K |
| Feb 03, 2021 | KOSS JOHN C JR | SALE | 25.44 | 10K | 254.4K | 271.16K |
| Feb 03, 2021 | KOSS MICHAEL J | SALE | 27.13 | 11K | 298.43K | 65.12K |
| Feb 02, 2021 | NANCY KOSS 2012 TRUST, DATED 12/20/12 | SALE | 19.84 | 30K | 595.2K | 757.95K |
| Feb 02, 2021 | LILLIE LENORE | SALE | 21.60 | 3K | 64.8K | 30.09K |
| Feb 01, 2021 | LILLIE LENORE | SALE | 46.25 | 6K | 277.5K | 65.09K |
| Feb 01, 2021 | SWEASY WILLIAM JESSE | SALE | 40.00 | 20K | 800K | 0 |
| Feb 01, 2021 | NANCY KOSS 2012 TRUST, DATED 12/20/12 | SALE | 35.01 | 20K | 700.2K | 787.95K |
| Feb 01, 2021 | DOERR THOMAS L. | SALE | 42.02 | 6.67K | 280.15K | 0 |
| Feb 01, 2021 | NIXON THEODORE | SALE | 43.78 | 30K | 1.31M | 0 |
| Feb 01, 2021 | LEVEEN STEVEN A | SALE | 38.25 | 5K | 191.25K | 0 |