NASDAQ:KOSS | Historical Stock Price | KOSS CORP

Complete retained daily price history on its own workbook tab. Split-adjusted close keeps every historical share price on one comparable split basis. Cumulative dividend-reinvested close is the daily close of a rebased total-return index: it starts with one share at the earliest retained close, reinvests every distribution, and normalizes every forward and reverse split exactly once. Admitted exchange opening prices remain a distinct current-session series.

Available history
1980-03-17 to 2026-09-03
Data captured

Stock Price Chart

Blue: Split-adjusted close · Orange: Cumulative dividend-reinvested close

$0.15$0.47$1.47$4.62$14.51$45.631980-03-172026-08-27

Logarithmic scale. Both lines share the same starting value for the selected range.

View year

Historical Stock Price — 2017

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2017-12-29$3.09$5.2712,431,600
2017-12-28$1.44$2.4541,700
2017-12-27$1.48$2.522,400
2017-12-26$1.49$2.5411,600
2017-12-22$1.49$2.54168,800
2017-12-21$1.50$2.564,100
2017-12-20$1.49$2.5414,900
2017-12-19$1.51$2.573,000
2017-12-18$1.49$2.546,000
2017-12-15$1.48$2.5217,000
2017-12-14$1.50$2.563,200
2017-12-13$1.50$2.5619,800
2017-12-12$1.52$2.5921,800
2017-12-11$1.57$2.684,200
2017-12-08$1.58$2.6925,400
2017-12-07$1.57$2.687,800
2017-12-06$1.58$2.6945,900
2017-12-05$1.66$2.8316,600
2017-12-04$1.64$2.795,100
2017-12-01$1.64$2.793,100
2017-11-30$1.68$2.862,200
2017-11-29$1.74$2.9716,700
2017-11-28$1.88$3.20228,400
2017-11-27$1.65$2.8132,300
2017-11-24$1.71$2.9117,900
2017-11-22$1.68$2.8634,400
2017-11-21$1.63$2.788,000
2017-11-20$1.62$2.7621,300
2017-11-17$1.68$2.8628,800
2017-11-16$1.65$2.8162,000
2017-11-15$1.58$2.69591,300
2017-11-14$1.59$2.7132,100
2017-11-13$1.54$2.6229,300
2017-11-10$1.57$2.68322,700
2017-11-09$1.56$2.667,700
2017-11-08$1.56$2.6629,000
2017-11-07$1.60$2.733,100
2017-11-06$1.63$2.785,500
2017-11-03$1.58$2.6931,900
2017-11-02$1.54$2.6232,200
2017-11-01$1.51$2.5732,900
2017-10-31$1.55$2.642,800
2017-10-30$1.57$2.68200
2017-10-27$1.55$2.6410,500
2017-10-26$1.60$2.730
2017-10-25$1.60$2.7335,300
2017-10-24$1.63$2.782,000
2017-10-23$1.65$2.814,600
2017-10-20$1.66$2.8331,600
2017-10-19$1.55$2.645,300
2017-10-18$1.59$2.7112,100
2017-10-17$1.56$2.669,700
2017-10-16$1.63$2.78400
2017-10-13$1.62$2.7630,000
2017-10-12$1.64$2.792,400
2017-10-11$1.68$2.8612,000
2017-10-10$1.78$3.0341,400
2017-10-09$1.57$2.683,700
2017-10-06$1.57$2.68165,400
2017-10-05$1.55$2.643,800
2017-10-04$1.48$2.520
2017-10-03$1.48$2.522,500
2017-10-02$1.49$2.548,400
2017-09-29$1.50$2.5610,000
2017-09-28$1.47$2.512,300
2017-09-27$1.50$2.561,800
2017-09-26$1.47$2.5113,100
2017-09-25$1.49$2.543,600
2017-09-22$1.53$2.6114,900
2017-09-21$1.58$2.691,600
2017-09-20$1.52$2.5913,300
2017-09-19$1.47$2.513,100
2017-09-18$1.50$2.568,800
2017-09-15$1.52$2.5918,400
2017-09-14$1.46$2.493,100
2017-09-13$1.45$2.477,000
2017-09-12$1.48$2.5255,400
2017-09-11$1.47$2.517,800
2017-09-08$1.47$2.5119,800
2017-09-07$1.47$2.5146,900
2017-09-06$1.53$2.6118,800
2017-09-05$1.43$2.448,100
2017-09-01$1.48$2.5224,800
2017-08-31$1.43$2.4421,700
2017-08-30$1.40$2.397,700
2017-08-29$1.53$2.6136,200
2017-08-28$1.51$2.5729,800
2017-08-25$1.56$2.663,100
2017-08-24$1.64$2.7914,500
2017-08-23$1.63$2.783,800
2017-08-22$1.68$2.869,200
2017-08-21$1.64$2.794,800
2017-08-18$1.66$2.835,100
2017-08-17$1.69$2.88700
2017-08-16$1.74$2.97900
2017-08-15$1.70$2.9064,400
2017-08-14$1.80$3.0771,000
2017-08-11$1.75$2.9824,400
2017-08-10$1.75$2.9849,600
2017-08-09$1.69$2.8832,600
2017-08-08$1.73$2.953,700
2017-08-07$1.75$2.982,500
2017-08-04$1.76$3.001,900
2017-08-03$1.75$2.9814,600
2017-08-02$1.77$3.0241,900
2017-08-01$1.74$2.9765,700
2017-07-31$1.79$3.053,100
2017-07-28$1.74$2.972,800
2017-07-27$1.72$2.932,200
2017-07-26$1.77$3.02115,100
2017-07-25$2.01$3.437,800
2017-07-24$1.98$3.379,800
2017-07-21$1.90$3.2438,000
2017-07-20$1.82$3.1099,200
2017-07-19$1.85$3.153,100
2017-07-18$1.87$3.1929,500
2017-07-17$1.81$3.0890,000
2017-07-14$1.79$3.051,800
2017-07-13$1.84$3.1420,900
2017-07-12$1.78$3.0320,300
2017-07-11$1.85$3.1583,700
2017-07-10$1.83$3.12900
2017-07-07$1.79$3.050
2017-07-06$1.79$3.0513,100
2017-07-05$1.81$3.083,600
2017-07-03$1.80$3.071,100
2017-06-30$1.81$3.081,900
2017-06-29$1.81$3.086,400
2017-06-28$1.87$3.198,100
2017-06-27$1.93$3.291,700
2017-06-26$1.91$3.2661,700
2017-06-23$1.86$3.178,800
2017-06-22$1.89$3.225,500
2017-06-21$1.85$3.151,200
2017-06-20$1.87$3.19900
2017-06-19$1.86$3.176,000
2017-06-16$1.91$3.267,200
2017-06-15$2.00$3.414,900
2017-06-14$1.92$3.2738,200
2017-06-13$2.03$3.4633,200
2017-06-12$1.83$3.1241,300
2017-06-09$2.05$3.4932,000
2017-06-08$1.93$3.2936,400
2017-06-07$2.01$3.4347,000
2017-06-06$1.93$3.2948,000
2017-06-05$1.86$3.175,200
2017-06-02$1.85$3.15215,000
2017-06-01$1.86$3.1752,000
2017-05-31$1.76$3.00800
2017-05-30$1.75$2.985,500
2017-05-26$1.75$2.984,600
2017-05-25$1.70$2.907,400
2017-05-24$1.74$2.9711,300
2017-05-23$1.70$2.90800
2017-05-22$1.70$2.904,100
2017-05-19$1.74$2.971,900
2017-05-18$1.68$2.8612,600
2017-05-17$1.70$2.9023,700
2017-05-16$1.65$2.819,100
2017-05-15$1.68$2.8621,700
2017-05-12$1.75$2.9886,200
2017-05-11$2.05$3.4944,400
2017-05-10$2.00$3.4186,600
2017-05-09$2.03$3.4610,000
2017-05-08$2.02$3.4419,800
2017-05-05$2.04$3.481,900
2017-05-04$2.09$3.5627,300
2017-05-03$2.09$3.5618,800
2017-05-02$2.08$3.5432,400
2017-05-01$2.12$3.6136,400
2017-04-28$2.11$3.6031,300
2017-04-27$2.15$3.6638,700
2017-04-26$2.10$3.5840,300
2017-04-25$2.14$3.65600
2017-04-24$2.13$3.6327,100
2017-04-21$2.06$3.514,300
2017-04-20$2.15$3.661,300
2017-04-19$2.17$3.7046,300
2017-04-18$2.12$3.613,800
2017-04-17$2.16$3.6818,200
2017-04-13$2.10$3.5814,900
2017-04-12$2.06$3.510
2017-04-11$2.06$3.514,500
2017-04-10$2.07$3.531,000
2017-04-07$2.09$3.565,100
2017-04-06$2.09$3.561,300
2017-04-05$2.06$3.5177,500
2017-04-04$2.14$3.6532,000
2017-04-03$2.16$3.683,500
2017-03-31$2.12$3.6117,300
2017-03-30$2.16$3.6817,400
2017-03-29$2.18$3.72124,400
2017-03-28$2.16$3.68126,800
2017-03-27$2.11$3.608,200
2017-03-24$2.12$3.6133,500
2017-03-23$2.19$3.7329,300
2017-03-22$2.19$3.7348,800
2017-03-21$2.26$3.853,100
2017-03-20$2.24$3.821,800
2017-03-17$2.21$3.772,000
2017-03-16$2.23$3.80700
2017-03-15$2.21$3.773,600
2017-03-14$2.20$3.755,100
2017-03-13$2.16$3.686,700
2017-03-10$2.20$3.757,700
2017-03-09$2.23$3.801,000
2017-03-08$2.22$3.7810,000
2017-03-07$2.24$3.821,400
2017-03-06$2.34$3.999,400
2017-03-03$2.27$3.8728,900
2017-03-02$2.37$4.0412,800
2017-03-01$2.35$4.0046,600
2017-02-28$2.37$4.0413,000
2017-02-27$2.36$4.0265,200
2017-02-24$2.40$4.0956,100
2017-02-23$2.31$3.9421,700
2017-02-22$2.31$3.9417,500
2017-02-21$2.38$4.065,800
2017-02-17$2.45$4.1838,500
2017-02-16$2.42$4.125,600
2017-02-15$2.36$4.023,000
2017-02-14$2.39$4.0718,600
2017-02-13$2.43$4.1424,300
2017-02-10$2.49$4.2415,100
2017-02-09$2.43$4.1491,800
2017-02-08$2.23$3.807,600
2017-02-07$2.26$3.8515,700
2017-02-06$2.17$3.705,600
2017-02-03$2.19$3.7322,300
2017-02-02$2.19$3.7332,000
2017-02-01$2.19$3.7329,700
2017-01-31$2.20$3.7513,200
2017-01-30$2.19$3.7312,600
2017-01-27$2.27$3.8758,200
2017-01-26$2.60$4.4328,100
2017-01-25$2.48$4.2348,200
2017-01-24$2.40$4.0934,300
2017-01-23$2.36$4.021,200
2017-01-20$2.33$3.9714,300
2017-01-19$2.34$3.996,000
2017-01-18$2.31$3.9423,700
2017-01-17$2.29$3.904,000
2017-01-13$2.32$3.9512,500
2017-01-12$2.31$3.9426,000
2017-01-11$2.42$4.12101,900
2017-01-10$2.28$3.8918,100
2017-01-09$2.26$3.8511,600
2017-01-06$2.28$3.8924,500
2017-01-05$2.25$3.8310,900
2017-01-04$2.23$3.8017,300
2017-01-03$2.29$3.9061,600