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 — 2009

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2009-12-31$5.51$7.740
2009-12-30$5.51$7.740
2009-12-29$5.51$7.740
2009-12-28$5.51$7.660
2009-12-24$5.51$7.660
2009-12-23$5.51$7.660
2009-12-22$5.51$7.660
2009-12-21$5.51$7.66300
2009-12-18$5.51$7.664,900
2009-12-17$5.50$7.64200
2009-12-16$5.61$7.805,700
2009-12-15$5.75$7.99400
2009-12-14$5.75$7.99400
2009-12-11$5.75$7.99300
2009-12-10$5.60$7.784,200
2009-12-09$5.75$7.99600
2009-12-08$5.93$8.243,500
2009-12-07$6.50$9.03100
2009-12-04$6.75$9.380
2009-12-03$6.75$9.383,700
2009-12-02$7.20$10.019,700
2009-12-01$6.45$8.960
2009-11-30$6.45$8.960
2009-11-27$6.45$8.960
2009-11-25$6.45$8.96800
2009-11-24$6.45$8.961,200
2009-11-23$6.45$8.967,000
2009-11-20$6.45$8.9610,200
2009-11-19$5.78$8.03800
2009-11-18$5.79$8.050
2009-11-17$5.79$8.050
2009-11-16$5.79$8.050
2009-11-13$5.79$8.05400
2009-11-12$6.10$8.480
2009-11-11$6.10$8.480
2009-11-10$6.10$8.480
2009-11-09$6.10$8.480
2009-11-06$6.10$8.48600
2009-11-05$5.88$8.17200
2009-11-04$5.53$7.691,800
2009-11-03$5.53$7.687,800
2009-11-02$5.88$8.170
2009-10-30$5.88$8.17400
2009-10-29$6.21$8.620
2009-10-28$6.21$8.620
2009-10-27$6.21$8.620
2009-10-26$6.21$8.620
2009-10-23$6.21$8.622,000
2009-10-22$5.76$8.00600
2009-10-21$5.96$8.280
2009-10-20$5.96$8.284,400
2009-10-19$5.63$7.820
2009-10-16$5.63$7.822,000
2009-10-15$5.74$7.98600
2009-10-14$5.74$7.980
2009-10-13$5.74$7.981,800
2009-10-12$5.78$8.031,000
2009-10-09$5.78$8.032,400
2009-10-08$5.74$7.985,200
2009-10-07$5.90$8.191,000
2009-10-06$6.00$8.343,800
2009-10-05$6.00$8.33400
2009-10-02$6.00$8.33400
2009-10-01$5.90$8.201,600
2009-09-30$5.83$8.105,600
2009-09-29$5.98$8.300
2009-09-28$5.98$8.300
2009-09-25$5.98$8.212,200
2009-09-24$5.92$8.130
2009-09-23$5.92$8.13400
2009-09-22$5.89$8.102,000
2009-09-21$6.20$8.524,200
2009-09-18$5.80$7.9710,000
2009-09-17$5.70$7.849,800
2009-09-16$6.02$8.27200
2009-09-15$6.46$8.881,400
2009-09-14$6.75$9.280
2009-09-11$6.75$9.282,600
2009-09-10$6.23$8.562,000
2009-09-09$6.73$9.251,800
2009-09-08$6.50$8.94800
2009-09-04$6.45$8.871,000
2009-09-03$6.12$8.411,800
2009-09-02$6.13$8.423,200
2009-09-01$5.96$8.192,400
2009-08-31$6.12$8.413,600
2009-08-28$6.57$9.03400
2009-08-27$6.25$8.594,000
2009-08-26$6.73$9.250
2009-08-25$6.73$9.253,600
2009-08-24$6.75$9.28200
2009-08-21$6.73$9.25600
2009-08-20$6.63$9.110
2009-08-19$6.63$9.11800
2009-08-18$6.25$8.591,400
2009-08-17$6.11$8.390
2009-08-14$6.11$8.390
2009-08-13$6.11$8.390
2009-08-12$6.11$8.391,600
2009-08-11$6.25$8.594,400
2009-08-10$6.79$9.33600
2009-08-07$7.30$10.042,200
2009-08-06$6.95$9.55400
2009-08-05$6.78$9.310
2009-08-04$6.78$9.310
2009-08-03$6.78$9.310
2009-07-31$6.78$9.311,400
2009-07-30$6.78$9.310
2009-07-29$6.78$9.313,000
2009-07-28$7.14$9.810
2009-07-27$7.14$9.81400
2009-07-24$7.21$9.912,000
2009-07-23$7.42$10.201,000
2009-07-22$7.43$10.213,200
2009-07-21$6.01$8.26200
2009-07-20$7.30$10.030
2009-07-17$7.30$10.0310,600
2009-07-16$7.43$10.2112,200
2009-07-15$6.25$8.591,800
2009-07-14$6.41$8.814,400
2009-07-13$6.56$9.011,600
2009-07-10$7.70$10.580
2009-07-09$7.70$10.580
2009-07-08$7.70$10.580
2009-07-07$7.70$10.580
2009-07-06$7.70$10.58200
2009-07-02$7.73$10.621,000
2009-07-01$7.50$10.311,200
2009-06-30$6.50$8.940
2009-06-29$6.50$8.940
2009-06-26$6.50$8.945,000
2009-06-25$7.53$10.260
2009-06-24$7.53$10.261,000
2009-06-23$6.50$8.860
2009-06-22$6.50$8.860
2009-06-19$6.50$8.86200
2009-06-18$6.08$8.295,600
2009-06-17$5.95$8.114,600
2009-06-16$6.05$8.256,000
2009-06-15$7.00$9.540
2009-06-12$7.00$9.541,200
2009-06-11$7.22$9.830
2009-06-10$7.22$9.83600
2009-06-09$7.50$10.220
2009-06-08$7.50$10.220
2009-06-05$7.50$10.220
2009-06-04$7.50$10.22400
2009-06-03$6.25$8.52200
2009-06-02$6.25$8.52800
2009-06-01$6.00$8.180
2009-05-29$6.00$8.181,000
2009-05-28$6.50$8.860
2009-05-27$6.50$8.8617,000
2009-05-26$6.58$8.970
2009-05-22$6.58$8.97200
2009-05-21$7.00$9.540
2009-05-20$7.00$9.54400
2009-05-19$7.30$9.940
2009-05-18$7.30$9.940
2009-05-15$7.30$9.940
2009-05-14$7.30$9.94200
2009-05-13$6.58$8.96200
2009-05-12$6.57$8.950
2009-05-11$6.57$8.950
2009-05-08$6.57$8.95400
2009-05-07$7.08$9.6414,800
2009-05-06$7.05$9.610
2009-05-05$7.05$9.611,200
2009-05-04$7.36$10.03800
2009-05-01$7.63$10.393,000
2009-04-30$7.00$9.546,600
2009-04-29$6.78$9.230
2009-04-28$6.78$9.230
2009-04-27$6.78$9.23400
2009-04-24$6.75$9.2014,200
2009-04-23$7.00$9.540
2009-04-22$7.00$9.540
2009-04-21$7.00$9.540
2009-04-20$7.00$9.54800
2009-04-17$7.13$9.710
2009-04-16$7.13$9.714,800
2009-04-15$7.32$9.982,600
2009-04-14$7.89$10.752,200
2009-04-13$7.63$10.392,800
2009-04-09$7.83$10.661,400
2009-04-08$7.63$10.405,000
2009-04-07$7.60$10.36600
2009-04-06$7.65$10.435,000
2009-04-03$7.75$10.566,400
2009-04-02$7.49$10.219,600
2009-04-01$6.30$8.590
2009-03-31$6.30$8.590
2009-03-30$6.30$8.59400
2009-03-27$5.63$7.670
2009-03-26$5.63$7.580
2009-03-25$5.63$7.58800
2009-03-24$5.63$7.580
2009-03-23$5.63$7.580
2009-03-20$5.63$7.580
2009-03-19$5.63$7.580
2009-03-18$5.63$7.58600
2009-03-17$5.48$7.380
2009-03-16$5.48$7.380
2009-03-13$5.48$7.382,400
2009-03-12$5.46$7.35200
2009-03-11$6.13$8.250
2009-03-10$6.13$8.250
2009-03-09$6.13$8.25800
2009-03-06$6.25$8.420
2009-03-05$6.25$8.420
2009-03-04$6.25$8.420
2009-03-03$6.25$8.42400
2009-03-02$5.47$7.374,000
2009-02-27$5.67$7.630
2009-02-26$5.67$7.63400
2009-02-25$5.45$7.34800
2009-02-24$5.43$7.31200
2009-02-23$5.39$7.265,800
2009-02-20$5.38$7.243,400
2009-02-19$5.64$7.604,600
2009-02-18$5.47$7.37400
2009-02-17$5.63$7.580
2009-02-13$5.63$7.5817,600
2009-02-12$5.99$8.070
2009-02-11$5.99$8.070
2009-02-10$5.99$8.070
2009-02-09$5.99$8.07200
2009-02-06$5.80$7.813,000
2009-02-05$5.88$7.91600
2009-02-04$5.42$7.290
2009-02-03$5.42$7.290
2009-02-02$5.42$7.291,200
2009-01-30$6.00$8.080
2009-01-29$6.00$8.082,000
2009-01-28$5.95$8.021,000
2009-01-27$5.52$7.441,000
2009-01-26$5.45$7.341,000
2009-01-23$5.45$7.340
2009-01-22$5.45$7.342,400
2009-01-21$5.45$7.340
2009-01-20$5.45$7.340
2009-01-16$5.45$7.344,800
2009-01-15$5.45$7.340
2009-01-14$5.45$7.340
2009-01-13$5.45$7.340
2009-01-12$5.45$7.3410,000
2009-01-09$4.78$6.440
2009-01-08$4.78$6.440
2009-01-07$4.78$6.440
2009-01-06$4.78$6.440
2009-01-05$4.78$6.442,200
2009-01-02$4.68$6.302,000