If you invested $1000 in Koss Corporation (KOSS) 10 years ago, it would be worth $1,829.38 as of October 03, 2026, based on a reinvested dividends scenario. Over the same period, a $1000 investment made 5 years ago would be worth $239.75, while $1000 invested 1 year ago would be worth $743.74. This corresponds to total returns of 82.94%, -76.02%, -25.63%, respectively, with annualized returns of 6.22%, -24.85%, -25.63%.
Custom investment amounts or purchase dates can also be explored using the Stoculator calculator. Past performance does not guarantee future results.
Date Range:
| Date | Open | Close | Adj Close | High | Low | Volume |
|---|---|---|---|---|---|---|
| October 02, 2026 | 3.95 | 3.86 | 3.86 | 3.95 | 3.78 | 23,474 |
| October 01, 2026 | 4.07 | 3.94 | 3.94 | 4.07 | 3.92 | 23,958 |
| September 30, 2026 | 3.97 | 4.02 | 4.02 | 4.03 | 3.91 | 16,267 |
| September 29, 2026 | 4.05 | 3.98 | 3.98 | 4.12 | 3.86 | 38,869 |
| September 28, 2026 | 4.01 | 4.08 | 4.08 | 4.2 | 4 | 99,814 |
| September 25, 2026 | 4.34 | 4 | 4 | 4.34 | 3.81 | 78,887 |
| September 24, 2026 | 4.01 | 4.2 | 4.2 | 4.44 | 3.94 | 263,108 |
| September 23, 2026 | 3.57 | 3.95 | 3.95 | 4.33 | 3.49 | 469,687 |
| September 22, 2026 | 3.53 | 3.5 | 3.5 | 3.54 | 3.46 | 38,431 |
| September 21, 2026 | 3.59 | 3.47 | 3.47 | 3.59 | 3.45 | 19,195 |
| September 18, 2026 | 3.54 | 3.59 | 3.59 | 3.62 | 3.41 | 29,645 |
| September 17, 2026 | 3.42 | 3.53 | 3.53 | 3.59 | 3.4 | 18,265 |
| September 16, 2026 | 3.43 | 3.36 | 3.36 | 3.48 | 3.35 | 13,814 |
| September 15, 2026 | 3.45 | 3.4 | 3.4 | 3.59 | 3.36 | 5,586 |
| September 11, 2026 | 3.42 | 3.41 | 3.41 | 3.5 | 3.39 | 26,171 |
| September 10, 2026 | 3.41 | 3.4 | 3.4 | 3.48 | 3.3 | 8,510 |
| September 09, 2026 | 3.5 | 3.46 | 3.46 | 3.5 | 3.43 | 6,853 |
| September 08, 2026 | 3.6 | 3.55 | 3.55 | 3.6 | 3.48 | 8,983 |
| September 04, 2026 | 3.45 | 3.58 | 3.58 | 3.65 | 3.45 | 16,923 |
| September 03, 2026 | 3.54 | 3.54 | 3.54 | 3.57 | 3.54 | 14,392 |
| September 02, 2026 | 3.45 | 3.5 | 3.5 | 3.53 | 3.41 | 25,353 |
| September 01, 2026 | 3.43 | 3.44 | 3.44 | 3.55 | 3.37 | 20,336 |
| August 31, 2026 | 3.58 | 3.46 | 3.46 | 3.59 | 3.44 | 12,521 |
| August 28, 2026 | 3.45 | 3.5 | 3.5 | 3.65 | 3.38 | 21,243 |
| August 27, 2026 | 3.38 | 3.42 | 3.42 | 3.51 | 3.37 | 30,583 |
| August 26, 2026 | 3.47 | 3.44 | 3.44 | 3.55 | 3.4 | 16,297 |
| August 25, 2026 | 3.45 | 3.45 | 3.45 | 3.52 | 3.4 | 17,101 |
| August 24, 2026 | 3.55 | 3.5 | 3.5 | 3.59 | 3.5 | 14,548 |
| August 21, 2026 | 3.5 | 3.57 | 3.57 | 3.61 | 3.5 | 16,261 |
| August 20, 2026 | 3.55 | 3.44 | 3.44 | 3.66 | 3.44 | 17,797 |
| August 19, 2026 | 3.63 | 3.56 | 3.56 | 3.63 | 3.56 | 9,640 |
| August 18, 2026 | 3.71 | 3.58 | 3.58 | 3.71 | 3.52 | 22,085 |
| August 17, 2026 | 3.68 | 3.7 | 3.7 | 3.78 | 3.68 | 8,599 |
| August 14, 2026 | 3.73 | 3.75 | 3.75 | 3.75 | 3.7 | 19,237 |
| August 13, 2026 | 3.73 | 3.67 | 3.67 | 3.73 | 3.67 | 13,145 |
| August 12, 2026 | 3.76 | 3.65 | 3.65 | 3.76 | 3.65 | 5,565 |
| August 11, 2026 | 3.75 | 3.74 | 3.74 | 3.78 | 3.7 | 11,111 |
| August 10, 2026 | 3.73 | 3.78 | 3.78 | 3.83 | 3.73 | 6,772 |
| August 07, 2026 | 3.64 | 3.72 | 3.72 | 3.78 | 3.64 | 7,254 |
| August 06, 2026 | 3.68 | 3.73 | 3.73 | 3.77 | 3.68 | 7,274 |
| August 05, 2026 | 3.75 | 3.73 | 3.73 | 3.78 | 3.69 | 15,842 |
| August 04, 2026 | 3.73 | 3.7 | 3.7 | 3.75 | 3.7 | 16,861 |
| August 03, 2026 | 3.79 | 3.73 | 3.73 | 3.79 | 3.68 | 47,332 |
| July 31, 2026 | 3.71 | 3.68 | 3.68 | 3.81 | 3.68 | 12,485 |
| July 30, 2026 | 3.68 | 3.68 | 3.68 | 3.79 | 3.66 | 12,165 |
| July 29, 2026 | 3.68 | 3.63 | 3.63 | 3.74 | 3.63 | 20,083 |
| July 28, 2026 | 3.69 | 3.72 | 3.72 | 3.8 | 3.66 | 15,510 |
| July 27, 2026 | 3.76 | 3.66 | 3.66 | 3.77 | 3.66 | 14,091 |
| July 23, 2026 | 3.8 | 3.76 | 3.76 | 3.86 | 3.71 | 12,814 |
| July 22, 2026 | 3.84 | 3.86 | 3.86 | 3.86 | 3.73 | 14,038 |
| July 21, 2026 | 3.8 | 3.8 | 3.8 | 3.83 | 3.73 | 17,434 |
| July 20, 2026 | 3.78 | 3.76 | 3.76 | 3.86 | 3.74 | 11,953 |
| July 17, 2026 | 3.82 | 3.8 | 3.8 | 3.9 | 3.78 | 23,525 |
| July 16, 2026 | 3.93 | 3.86 | 3.86 | 4.03 | 3.8 | 19,574 |
| July 15, 2026 | 3.89 | 3.97 | 3.97 | 3.98 | 3.82 | 12,501 |
| July 14, 2026 | 3.9 | 3.79 | 3.79 | 3.95 | 3.74 | 46,865 |
| July 13, 2026 | 3.93 | 3.9 | 3.9 | 3.97 | 3.9 | 5,122 |
| July 10, 2026 | 3.88 | 3.95 | 3.95 | 3.95 | 3.82 | 18,234 |
| July 09, 2026 | 3.8 | 3.87 | 3.87 | 3.99 | 3.79 | 17,629 |
| July 08, 2026 | 3.89 | 3.82 | 3.82 | 3.95 | 3.79 | 20,273 |