Koss Corporation (KOSS)
NASDAQ: KOSS · Real-Time Price · USD
4.000
-0.200 (-4.76%)
At close: Sep 25, 2026, 4:00 PM EDT
3.870
-0.130 (-3.25%)
After-hours: Sep 25, 2026, 7:30 PM EDT
Koss Corporation Stock Price History
| Date | Open | High | Low | Close | Adj. Close | Change | Volume |
|---|---|---|---|---|---|---|---|
| Sep 25, 2026 | 4.34 | 4.34 | 3.81 | 4.00 | 4.00 | -4.76% | 78,887 |
| Sep 24, 2026 | 4.01 | 4.44 | 3.94 | 4.20 | 4.20 | 6.33% | 265,178 |
| Sep 23, 2026 | 3.57 | 4.33 | 3.49 | 3.95 | 3.95 | 12.86% | 477,899 |
| Sep 22, 2026 | 3.47 | 3.54 | 3.46 | 3.50 | 3.50 | 0.86% | 38,438 |
| Sep 21, 2026 | 3.59 | 3.62 | 3.42 | 3.47 | 3.47 | -3.34% | 19,212 |
| Sep 18, 2026 | 3.54 | 3.62 | 3.42 | 3.59 | 3.59 | 1.70% | 29,646 |
| Sep 17, 2026 | 3.42 | 3.59 | 3.40 | 3.53 | 3.53 | 5.06% | 18,449 |
| Sep 16, 2026 | 3.43 | 3.48 | 3.35 | 3.36 | 3.36 | -1.18% | 14,025 |
| Sep 15, 2026 | 3.62 | 3.62 | 3.37 | 3.40 | 3.40 | -0.87% | 5,666 |
| Sep 14, 2026 | 3.48 | 3.62 | 3.40 | 3.43 | 3.43 | 0.59% | 18,174 |
| Sep 11, 2026 | 3.39 | 3.63 | 3.39 | 3.41 | 3.41 | 0.29% | 26,381 |
| Sep 10, 2026 | 3.47 | 3.48 | 3.30 | 3.40 | 3.40 | -1.73% | 9,512 |
| Sep 9, 2026 | 3.50 | 3.50 | 3.43 | 3.46 | 3.46 | -2.54% | 7,364 |
| Sep 8, 2026 | 3.60 | 3.60 | 3.48 | 3.55 | 3.55 | -0.84% | 8,986 |
| Sep 4, 2026 | 3.45 | 3.65 | 3.45 | 3.58 | 3.58 | 1.12% | 16,974 |
| Sep 3, 2026 | 3.57 | 3.57 | 3.41 | 3.54 | 3.54 | 1.15% | 14,868 |
| Sep 2, 2026 | 3.45 | 3.53 | 3.41 | 3.50 | 3.50 | 1.74% | 25,360 |
| Sep 1, 2026 | 3.43 | 3.55 | 3.37 | 3.44 | 3.44 | -0.58% | 20,338 |
| Aug 31, 2026 | 3.51 | 3.60 | 3.40 | 3.46 | 3.46 | -1.14% | 12,704 |
| Aug 28, 2026 | 3.45 | 3.65 | 3.38 | 3.50 | 3.50 | 2.34% | 21,280 |
| Aug 27, 2026 | 3.40 | 3.51 | 3.37 | 3.42 | 3.42 | -0.44% | 32,375 |
| Aug 26, 2026 | 3.47 | 3.55 | 3.40 | 3.44 | 3.44 | -0.43% | 17,394 |
| Aug 25, 2026 | 3.50 | 3.52 | 3.40 | 3.45 | 3.45 | -1.43% | 17,225 |
| Aug 24, 2026 | 3.55 | 3.59 | 3.50 | 3.50 | 3.50 | -1.96% | 14,968 |
| Aug 21, 2026 | 3.50 | 3.61 | 3.50 | 3.57 | 3.57 | 3.78% | 16,448 |
| Aug 20, 2026 | 3.55 | 3.66 | 3.44 | 3.44 | 3.44 | -3.37% | 17,803 |
| Aug 19, 2026 | 3.63 | 3.63 | 3.56 | 3.56 | 3.56 | -0.56% | 10,242 |
| Aug 18, 2026 | 3.71 | 3.71 | 3.52 | 3.58 | 3.58 | -3.24% | 22,197 |
| Aug 17, 2026 | 3.68 | 3.78 | 3.68 | 3.70 | 3.70 | -1.33% | 8,601 |
| Aug 14, 2026 | 3.73 | 3.75 | 3.70 | 3.75 | 3.75 | 2.18% | 19,238 |
| Aug 13, 2026 | 3.73 | 3.73 | 3.65 | 3.67 | 3.67 | 0.55% | 13,343 |
| Aug 12, 2026 | 3.71 | 3.76 | 3.65 | 3.65 | 3.65 | -2.41% | 5,728 |
| Aug 11, 2026 | 3.75 | 3.78 | 3.70 | 3.74 | 3.74 | -0.93% | 11,132 |
| Aug 10, 2026 | 3.73 | 3.83 | 3.73 | 3.78 | 3.78 | 1.48% | 6,790 |
| Aug 7, 2026 | 3.64 | 3.78 | 3.64 | 3.72 | 3.72 | -0.27% | 7,573 |
| Aug 6, 2026 | 3.68 | 3.77 | 3.68 | 3.73 | 3.73 | - | 7,275 |
| Aug 5, 2026 | 3.75 | 3.78 | 3.69 | 3.73 | 3.73 | 0.81% | 15,844 |
| Aug 4, 2026 | 3.73 | 3.75 | 3.70 | 3.70 | 3.70 | -0.80% | 16,921 |
| Aug 3, 2026 | 3.79 | 3.79 | 3.68 | 3.73 | 3.73 | 1.36% | 47,333 |
| Jul 31, 2026 | 3.71 | 3.81 | 3.68 | 3.68 | 3.68 | - | 12,557 |
| Jul 30, 2026 | 3.68 | 3.79 | 3.66 | 3.68 | 3.68 | 1.38% | 12,168 |
| Jul 29, 2026 | 3.68 | 3.74 | 3.63 | 3.63 | 3.63 | -2.42% | 20,083 |
| Jul 28, 2026 | 3.69 | 3.80 | 3.66 | 3.72 | 3.72 | 1.64% | 15,510 |
| Jul 27, 2026 | 3.76 | 3.77 | 3.66 | 3.66 | 3.66 | -2.40% | 13,940 |
| Jul 24, 2026 | 3.84 | 3.84 | 3.65 | 3.75 | 3.75 | -0.27% | 18,743 |
| Jul 23, 2026 | 3.80 | 3.86 | 3.72 | 3.76 | 3.76 | -2.59% | 12,986 |
| Jul 22, 2026 | 3.84 | 3.86 | 3.73 | 3.86 | 3.86 | 1.58% | 14,357 |
| Jul 21, 2026 | 3.80 | 3.83 | 3.73 | 3.80 | 3.80 | 1.06% | 18,905 |
| Jul 20, 2026 | 3.78 | 3.86 | 3.74 | 3.76 | 3.76 | -1.05% | 13,037 |
| Jul 17, 2026 | 3.82 | 3.90 | 3.78 | 3.80 | 3.80 | -1.55% | 23,530 |