Koss Corporation (KOSS)
NASDAQ: KOSS · Real-Time Price · USD
5.80
+0.10 (1.85%)
At close: Sep 15, 2025, 4:00 PM EDT
5.81
+0.01 (0.26%)
After-hours: Sep 15, 2025, 7:30 PM EDT
Koss Corporation Stock Price History
Historical Data
| Date | Open | High | Low | Close | Adj. Close | Change | Volume |
|---|---|---|---|---|---|---|---|
| Sep 15, 2025 | 5.69 | 5.91 | 5.69 | 5.80 | 5.80 | 1.85% | 73,801 |
| Sep 12, 2025 | 5.70 | 5.76 | 5.60 | 5.69 | 5.69 | -0.52% | 31,668 |
| Sep 11, 2025 | 5.82 | 5.87 | 5.70 | 5.72 | 5.72 | -1.04% | 51,505 |
| Sep 10, 2025 | 6.08 | 6.12 | 5.72 | 5.78 | 5.78 | -4.70% | 81,851 |
| Sep 9, 2025 | 6.02 | 6.13 | 5.97 | 6.07 | 6.07 | 0.08% | 51,788 |
| Sep 8, 2025 | 6.25 | 6.29 | 6.02 | 6.06 | 6.06 | -1.46% | 41,495 |
| Sep 5, 2025 | 6.10 | 6.24 | 5.95 | 6.15 | 6.15 | 1.32% | 23,506 |
| Sep 4, 2025 | 6.18 | 6.18 | 6.02 | 6.07 | 6.07 | -2.02% | 25,161 |
| Sep 3, 2025 | 6.27 | 6.33 | 6.13 | 6.20 | 6.20 | -0.48% | 40,270 |
| Sep 2, 2025 | 6.10 | 6.31 | 6.03 | 6.23 | 6.23 | 0.40% | 40,542 |
| Aug 29, 2025 | 6.38 | 6.39 | 6.10 | 6.20 | 6.20 | -0.16% | 32,861 |
| Aug 28, 2025 | 6.39 | 6.39 | 6.14 | 6.21 | 6.21 | -3.12% | 59,639 |
| Aug 27, 2025 | 6.55 | 6.68 | 6.34 | 6.41 | 6.41 | -1.54% | 47,039 |
| Aug 26, 2025 | 6.12 | 6.85 | 6.06 | 6.51 | 6.51 | 2.36% | 154,311 |
| Aug 25, 2025 | 6.48 | 6.55 | 6.30 | 6.36 | 6.36 | -1.85% | 90,477 |
| Aug 22, 2025 | 6.25 | 6.60 | 6.22 | 6.48 | 6.48 | 5.28% | 60,099 |
| Aug 21, 2025 | 6.08 | 6.29 | 6.00 | 6.16 | 6.16 | 0.90% | 33,687 |
| Aug 20, 2025 | 6.50 | 6.56 | 6.00 | 6.10 | 6.10 | -5.86% | 84,435 |
| Aug 19, 2025 | 6.90 | 6.93 | 6.20 | 6.48 | 6.48 | 5.62% | 378,622 |
| Aug 18, 2025 | 5.74 | 6.20 | 5.70 | 6.14 | 6.14 | 7.82% | 149,036 |
| Aug 15, 2025 | 5.54 | 5.80 | 5.52 | 5.69 | 5.69 | 4.02% | 66,376 |
| Aug 14, 2025 | 5.35 | 5.59 | 5.33 | 5.47 | 5.47 | -0.18% | 35,133 |
| Aug 13, 2025 | 5.46 | 5.50 | 5.30 | 5.48 | 5.48 | 2.24% | 40,565 |
| Aug 12, 2025 | 5.31 | 5.54 | 5.31 | 5.36 | 5.36 | 0.56% | 23,691 |
| Aug 11, 2025 | 5.55 | 5.58 | 5.22 | 5.33 | 5.33 | -2.74% | 37,678 |
| Aug 8, 2025 | 5.49 | 5.58 | 5.35 | 5.48 | 5.48 | -1.44% | 28,457 |
| Aug 7, 2025 | 5.76 | 5.76 | 5.43 | 5.56 | 5.56 | -2.97% | 36,583 |
| Aug 6, 2025 | 5.72 | 5.93 | 5.65 | 5.73 | 5.73 | 0.17% | 26,485 |
| Aug 5, 2025 | 5.44 | 5.78 | 5.41 | 5.72 | 5.72 | 5.54% | 68,571 |
| Aug 4, 2025 | 5.35 | 5.55 | 5.30 | 5.42 | 5.42 | 0.56% | 31,068 |
| Aug 1, 2025 | 5.27 | 5.39 | 5.11 | 5.39 | 5.39 | 2.08% | 48,667 |
| Jul 31, 2025 | 5.42 | 5.42 | 5.27 | 5.28 | 5.28 | -1.31% | 38,669 |
| Jul 30, 2025 | 5.59 | 5.65 | 5.35 | 5.35 | 5.35 | -4.12% | 94,559 |
| Jul 29, 2025 | 5.62 | 5.77 | 5.30 | 5.58 | 5.58 | 0.18% | 94,808 |
| Jul 28, 2025 | 5.53 | 5.66 | 5.31 | 5.57 | 5.57 | 0.91% | 70,333 |
| Jul 25, 2025 | 5.77 | 5.87 | 5.52 | 5.52 | 5.52 | -2.82% | 101,476 |
| Jul 24, 2025 | 6.07 | 6.17 | 5.68 | 5.68 | 5.68 | -9.41% | 233,389 |
| Jul 23, 2025 | 6.37 | 8.59 | 6.12 | 6.27 | 6.27 | 9.81% | 6,521,513 |
| Jul 22, 2025 | 5.46 | 5.75 | 5.39 | 5.71 | 5.71 | 6.13% | 74,801 |
| Jul 21, 2025 | 5.29 | 5.68 | 5.29 | 5.38 | 5.38 | 0.56% | 116,766 |
| Jul 18, 2025 | 5.34 | 5.48 | 5.23 | 5.35 | 5.35 | 0.56% | 36,628 |
| Jul 17, 2025 | 5.34 | 5.60 | 5.30 | 5.32 | 5.32 | 0.95% | 64,038 |
| Jul 16, 2025 | 5.13 | 5.30 | 5.10 | 5.27 | 5.27 | 4.15% | 31,699 |
| Jul 15, 2025 | 5.15 | 5.25 | 5.03 | 5.06 | 5.06 | -0.98% | 27,242 |
| Jul 14, 2025 | 5.22 | 5.40 | 5.02 | 5.11 | 5.11 | -2.67% | 28,604 |
| Jul 11, 2025 | 5.51 | 5.63 | 5.21 | 5.25 | 5.25 | -4.20% | 55,008 |
| Jul 10, 2025 | 5.29 | 5.55 | 5.20 | 5.48 | 5.48 | 2.24% | 55,113 |
| Jul 9, 2025 | 5.29 | 5.37 | 5.14 | 5.36 | 5.36 | 1.52% | 45,292 |
| Jul 8, 2025 | 5.27 | 5.35 | 5.20 | 5.28 | 5.28 | - | 33,545 |
| Jul 7, 2025 | 5.18 | 5.37 | 5.12 | 5.28 | 5.28 | 0.96% | 22,507 |