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.

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Historical Stock Price — 1990

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
1990-12-31$0.44$0.4439,200
1990-12-28$0.38$0.3746,800
1990-12-27$0.38$0.3721,200
1990-12-26$0.38$0.376,400
1990-12-24$0.38$0.376,800
1990-12-21$0.38$0.372,000
1990-12-20$0.38$0.37800
1990-12-19$0.44$0.4422,000
1990-12-18$0.34$0.344,000
1990-12-17$0.34$0.340
1990-12-14$0.34$0.34800
1990-12-13$0.44$0.446,400
1990-12-12$0.47$0.470
1990-12-11$0.47$0.470
1990-12-10$0.47$0.470
1990-12-07$0.47$0.470
1990-12-06$0.47$0.47800
1990-12-05$0.47$0.4731,200
1990-12-04$0.34$0.342,800
1990-12-03$0.38$0.370
1990-11-30$0.38$0.372,000
1990-11-29$0.38$0.372,800
1990-11-28$0.38$0.377,200
1990-11-27$0.38$0.370
1990-11-26$0.38$0.3742,000
1990-11-23$0.38$0.372,800
1990-11-21$0.38$0.373,200
1990-11-20$0.38$0.377,600
1990-11-19$0.38$0.378,400
1990-11-16$0.38$0.372,800
1990-11-15$0.38$0.370
1990-11-14$0.38$0.370
1990-11-13$0.38$0.370
1990-11-12$0.38$0.370
1990-11-09$0.38$0.373,200
1990-11-08$0.38$0.37400
1990-11-07$0.38$0.374,000
1990-11-06$0.38$0.370
1990-11-05$0.38$0.3731,600
1990-11-02$0.41$0.412,000
1990-11-01$0.41$0.41800
1990-10-31$0.47$0.470
1990-10-30$0.47$0.470
1990-10-29$0.47$0.474,400
1990-10-26$0.41$0.41800
1990-10-25$0.47$0.470
1990-10-24$0.47$0.47800
1990-10-23$0.47$0.473,200
1990-10-22$0.41$0.410
1990-10-19$0.41$0.410
1990-10-18$0.41$0.410
1990-10-17$0.41$0.418,000
1990-10-16$0.47$0.473,200
1990-10-15$0.41$0.41800
1990-10-12$0.41$0.41400
1990-10-11$0.47$0.4712,400
1990-10-10$0.44$0.440
1990-10-09$0.44$0.440
1990-10-08$0.44$0.4415,600
1990-10-05$0.44$0.440
1990-10-04$0.44$0.44400
1990-10-03$0.50$0.500
1990-10-02$0.50$0.500
1990-10-01$0.50$0.500
1990-09-28$0.50$0.506,800
1990-09-27$0.44$0.4412,000
1990-09-26$0.50$0.508,800
1990-09-25$0.53$0.53800
1990-09-24$0.53$0.532,000
1990-09-21$0.63$0.620
1990-09-20$0.63$0.628,400
1990-09-19$0.59$0.594,000
1990-09-18$0.59$0.590
1990-09-17$0.59$0.596,000
1990-09-14$0.59$0.5916,800
1990-09-13$0.63$0.6235,200
1990-09-12$0.66$0.6612,800
1990-09-11$0.63$0.620
1990-09-10$0.63$0.624,000
1990-09-07$0.66$0.66400
1990-09-06$0.66$0.6616,000
1990-09-05$0.63$0.620
1990-09-04$0.63$0.62800
1990-08-31$0.63$0.620
1990-08-30$0.63$0.624,000
1990-08-29$0.66$0.660
1990-08-28$0.66$0.664,000
1990-08-27$0.63$0.623,600
1990-08-24$0.63$0.620
1990-08-23$0.63$0.6224,000
1990-08-22$0.63$0.6224,000
1990-08-21$0.66$0.660
1990-08-20$0.66$0.6612,000
1990-08-17$0.63$0.620
1990-08-16$0.63$0.628,000
1990-08-15$0.63$0.620
1990-08-14$0.63$0.620
1990-08-13$0.63$0.622,800
1990-08-10$0.63$0.620
1990-08-09$0.63$0.622,000
1990-08-08$0.66$0.662,400
1990-08-07$0.63$0.626,400
1990-08-06$0.69$0.690
1990-08-03$0.69$0.6918,400
1990-08-02$0.69$0.6910,800
1990-08-01$0.69$0.691,200
1990-07-31$0.69$0.692,000
1990-07-30$0.69$0.690
1990-07-27$0.69$0.693,600
1990-07-26$0.63$0.622,000
1990-07-25$0.63$0.628,000
1990-07-24$0.69$0.690
1990-07-23$0.69$0.6938,400
1990-07-20$0.72$0.72400
1990-07-19$0.72$0.722,800
1990-07-18$0.78$0.780
1990-07-17$0.78$0.784,400
1990-07-16$0.72$0.7210,400
1990-07-13$0.72$0.724,800
1990-07-12$0.72$0.723,600
1990-07-11$0.72$0.72800
1990-07-10$0.72$0.725,200
1990-07-09$0.78$0.783,600
1990-07-06$0.78$0.780
1990-07-05$0.78$0.780
1990-07-03$0.78$0.784,800
1990-07-02$0.75$0.7516,400
1990-06-29$0.75$0.751,600
1990-06-28$0.72$0.721,600
1990-06-27$0.78$0.7829,600
1990-06-26$0.88$0.8862,800
1990-06-25$0.88$0.8812,400
1990-06-22$0.84$0.844,000
1990-06-21$0.84$0.840
1990-06-20$0.84$0.842,400
1990-06-19$0.91$0.912,800
1990-06-18$0.88$0.88100,800
1990-06-15$0.88$0.8870,000
1990-06-14$0.84$0.848,000
1990-06-13$0.88$0.8896,400
1990-06-12$0.81$0.812,800
1990-06-11$0.81$0.810
1990-06-08$0.81$0.8144,800
1990-06-07$0.84$0.8490,400
1990-06-06$0.78$0.78137,200
1990-06-05$0.78$0.78800
1990-06-04$0.78$0.788,000
1990-06-01$0.78$0.782,000
1990-05-31$0.78$0.781,200
1990-05-30$0.78$0.7828,400
1990-05-29$0.78$0.7832,000
1990-05-25$0.78$0.7810,400
1990-05-24$0.78$0.7827,200
1990-05-23$0.78$0.782,400
1990-05-22$0.78$0.7825,200
1990-05-21$0.78$0.7810,000
1990-05-18$0.84$0.845,200
1990-05-17$0.78$0.784,000
1990-05-16$0.78$0.7810,400
1990-05-15$0.78$0.783,200
1990-05-14$0.84$0.841,600
1990-05-11$0.84$0.842,400
1990-05-10$0.81$0.810
1990-05-09$0.81$0.813,200
1990-05-08$0.84$0.844,400
1990-05-07$0.78$0.781,200
1990-05-04$0.78$0.782,800
1990-05-03$0.78$0.78400
1990-05-02$0.78$0.78400
1990-05-01$0.78$0.780
1990-04-30$0.78$0.782,000
1990-04-27$0.84$0.8410,000
1990-04-26$0.84$0.84800
1990-04-25$0.84$0.841,200
1990-04-24$0.78$0.787,600
1990-04-23$0.84$0.842,800
1990-04-20$0.84$0.84400
1990-04-19$0.84$0.8418,800
1990-04-18$0.75$0.754,000
1990-04-17$0.78$0.781,200
1990-04-16$0.81$0.8141,600
1990-04-12$0.81$0.818,400
1990-04-11$0.81$0.8116,000
1990-04-10$0.78$0.785,200
1990-04-09$0.81$0.8144,400
1990-04-06$0.91$0.9119,600
1990-04-05$0.91$0.9120,800
1990-04-04$0.91$0.912,800
1990-04-03$0.88$0.8838,000
1990-04-02$1.00$1.000
1990-03-30$1.00$1.002,800
1990-03-29$1.00$1.000
1990-03-28$1.00$1.000
1990-03-27$1.00$1.000
1990-03-26$1.00$1.008,800
1990-03-23$1.00$1.000
1990-03-22$1.00$1.0078,800
1990-03-21$1.00$1.0033,200
1990-03-20$1.00$1.006,400
1990-03-19$1.00$1.0012,400
1990-03-16$1.06$1.064,800
1990-03-15$1.03$1.0353,200
1990-03-14$1.09$1.0922,800
1990-03-13$1.06$1.060
1990-03-12$1.06$1.069,200
1990-03-09$1.06$1.064,400
1990-03-08$1.09$1.09800
1990-03-07$1.09$1.0914,800
1990-03-06$1.09$1.09218,000
1990-03-05$1.03$1.032,400
1990-03-02$1.06$1.06112,800
1990-03-01$1.03$1.0312,000
1990-02-28$1.03$1.03400
1990-02-27$1.03$1.0365,600
1990-02-26$1.03$1.0322,800
1990-02-23$1.03$1.036,800
1990-02-22$1.06$1.064,400
1990-02-21$1.00$1.002,000
1990-02-20$1.00$1.00400
1990-02-16$1.00$1.000
1990-02-15$1.00$1.000
1990-02-14$1.00$1.00800
1990-02-13$1.00$1.000
1990-02-12$1.00$1.00145,200
1990-02-09$1.03$1.0311,600
1990-02-08$1.06$1.0610,000
1990-02-07$1.00$1.000
1990-02-06$1.00$1.003,200
1990-02-05$1.06$1.060
1990-02-02$1.06$1.063,200
1990-02-01$1.06$1.06400
1990-01-31$1.03$1.0358,400
1990-01-30$1.03$1.036,800
1990-01-29$1.03$1.034,000
1990-01-26$1.09$1.0910,400
1990-01-25$1.09$1.0933,600
1990-01-24$1.06$1.0696,000
1990-01-23$1.09$1.0914,400
1990-01-22$1.06$1.06400
1990-01-19$1.09$1.093,600
1990-01-18$1.06$1.061,200
1990-01-17$1.06$1.066,000
1990-01-16$1.06$1.066,800
1990-01-15$1.06$1.0620,400
1990-01-12$1.09$1.0910,000
1990-01-11$1.09$1.0910,000
1990-01-10$1.09$1.09800
1990-01-09$1.09$1.0913,600
1990-01-08$1.09$1.0979,600
1990-01-05$1.09$1.094,800
1990-01-04$1.09$1.092,400
1990-01-03$1.09$1.092,000
1990-01-02$1.09$1.095,600