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 — 1991

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
1991-12-31$0.63$0.6216,000
1991-12-30$0.56$0.5619,200
1991-12-27$0.56$0.5637,200
1991-12-26$0.56$0.563,200
1991-12-24$0.63$0.624,000
1991-12-23$0.56$0.5670,400
1991-12-20$0.56$0.562,800
1991-12-19$0.63$0.6210,000
1991-12-18$0.56$0.562,400
1991-12-17$0.63$0.62400
1991-12-16$0.56$0.5615,600
1991-12-13$0.56$0.564,000
1991-12-12$0.56$0.568,800
1991-12-11$0.56$0.564,000
1991-12-10$0.56$0.5610,000
1991-12-09$0.59$0.59132,000
1991-12-06$0.59$0.5924,800
1991-12-05$0.56$0.56159,200
1991-12-04$0.56$0.560
1991-12-03$0.56$0.567,600
1991-12-02$0.53$0.5318,000
1991-11-29$0.56$0.560
1991-11-27$0.56$0.5610,000
1991-11-26$0.59$0.59800
1991-11-25$0.56$0.5616,000
1991-11-22$0.56$0.5646,800
1991-11-21$0.59$0.5936,800
1991-11-20$0.63$0.6214,000
1991-11-19$0.69$0.69400
1991-11-18$0.69$0.69400
1991-11-15$0.63$0.6244,000
1991-11-14$0.69$0.694,000
1991-11-13$0.69$0.694,800
1991-11-12$0.69$0.696,400
1991-11-11$0.63$0.62800
1991-11-08$0.69$0.695,600
1991-11-07$0.63$0.6212,000
1991-11-06$0.59$0.590
1991-11-05$0.59$0.590
1991-11-04$0.59$0.592,800
1991-11-01$0.59$0.59400
1991-10-31$0.63$0.6250,800
1991-10-30$0.66$0.661,200
1991-10-29$0.63$0.6226,400
1991-10-28$0.66$0.667,600
1991-10-25$0.66$0.6635,200
1991-10-24$0.56$0.5613,200
1991-10-23$0.63$0.621,200
1991-10-22$0.56$0.5612,000
1991-10-21$0.56$0.568,400
1991-10-18$0.53$0.5324,000
1991-10-17$0.47$0.470
1991-10-16$0.47$0.4712,400
1991-10-15$0.56$0.562,000
1991-10-14$0.47$0.470
1991-10-11$0.47$0.472,400
1991-10-10$0.56$0.5634,400
1991-10-09$0.47$0.472,000
1991-10-08$0.50$0.5022,800
1991-10-07$0.59$0.590
1991-10-04$0.59$0.591,600
1991-10-03$0.50$0.500
1991-10-02$0.50$0.5023,200
1991-10-01$0.63$0.622,000
1991-09-30$0.63$0.6214,000
1991-09-27$0.56$0.561,600
1991-09-26$0.63$0.620
1991-09-25$0.63$0.62400
1991-09-24$0.59$0.5922,000
1991-09-23$0.69$0.694,000
1991-09-20$0.63$0.621,200
1991-09-19$0.72$0.720
1991-09-18$0.72$0.72400
1991-09-17$0.63$0.624,400
1991-09-16$0.72$0.721,600
1991-09-13$0.63$0.6211,600
1991-09-12$0.72$0.7212,000
1991-09-11$0.63$0.625,200
1991-09-10$0.59$0.597,200
1991-09-09$0.69$0.694,800
1991-09-06$0.69$0.694,800
1991-09-05$0.66$0.6617,600
1991-09-04$0.59$0.5933,600
1991-09-03$0.66$0.66138,400
1991-08-30$0.56$0.565,200
1991-08-29$0.50$0.502,400
1991-08-28$0.50$0.500
1991-08-27$0.50$0.5028,800
1991-08-26$0.47$0.4738,800
1991-08-23$0.44$0.444,000
1991-08-22$0.44$0.441,200
1991-08-21$0.47$0.470
1991-08-20$0.47$0.470
1991-08-19$0.47$0.478,800
1991-08-16$0.50$0.50400
1991-08-15$0.44$0.44400
1991-08-14$0.44$0.44800
1991-08-13$0.41$0.410
1991-08-12$0.41$0.410
1991-08-09$0.41$0.410
1991-08-08$0.41$0.410
1991-08-07$0.41$0.412,000
1991-08-06$0.41$0.41400
1991-08-05$0.53$0.530
1991-08-02$0.53$0.534,000
1991-08-01$0.56$0.560
1991-07-31$0.56$0.560
1991-07-30$0.56$0.560
1991-07-29$0.56$0.560
1991-07-26$0.56$0.566,000
1991-07-25$0.44$0.44400
1991-07-24$0.47$0.470
1991-07-23$0.47$0.4717,600
1991-07-22$0.44$0.441,200
1991-07-19$0.44$0.441,600
1991-07-18$0.44$0.440
1991-07-17$0.44$0.448,000
1991-07-16$0.44$0.441,600
1991-07-15$0.44$0.440
1991-07-12$0.44$0.44400
1991-07-11$0.44$0.440
1991-07-10$0.44$0.440
1991-07-09$0.44$0.442,000
1991-07-08$0.44$0.441,200
1991-07-05$0.47$0.470
1991-07-03$0.47$0.473,200
1991-07-02$0.44$0.440
1991-07-01$0.44$0.440
1991-06-28$0.44$0.440
1991-06-27$0.44$0.440
1991-06-26$0.44$0.441,600
1991-06-25$0.44$0.440
1991-06-24$0.44$0.4414,800
1991-06-21$0.44$0.440
1991-06-20$0.44$0.448,000
1991-06-19$0.41$0.4120,000
1991-06-18$0.56$0.560
1991-06-17$0.56$0.562,800
1991-06-14$0.56$0.560
1991-06-13$0.56$0.560
1991-06-12$0.56$0.56400
1991-06-11$0.47$0.474,800
1991-06-10$0.47$0.473,600
1991-06-07$0.44$0.444,800
1991-06-06$0.44$0.4412,000
1991-06-05$0.44$0.449,600
1991-06-04$0.56$0.561,600
1991-06-03$0.50$0.5027,200
1991-05-31$0.44$0.441,200
1991-05-30$0.44$0.440
1991-05-29$0.44$0.440
1991-05-28$0.44$0.440
1991-05-24$0.44$0.441,600
1991-05-23$0.44$0.440
1991-05-22$0.44$0.440
1991-05-21$0.44$0.440
1991-05-20$0.44$0.440
1991-05-17$0.44$0.440
1991-05-16$0.44$0.441,200
1991-05-15$0.44$0.440
1991-05-14$0.44$0.440
1991-05-13$0.44$0.440
1991-05-10$0.44$0.440
1991-05-09$0.44$0.44800
1991-05-08$0.44$0.444,400
1991-05-07$0.44$0.4412,000
1991-05-06$0.56$0.560
1991-05-03$0.56$0.560
1991-05-02$0.56$0.56400
1991-05-01$0.56$0.560
1991-04-30$0.56$0.560
1991-04-29$0.56$0.561,600
1991-04-26$0.50$0.501,600
1991-04-25$0.50$0.503,600
1991-04-24$0.44$0.440
1991-04-23$0.44$0.440
1991-04-22$0.44$0.440
1991-04-19$0.44$0.44800
1991-04-18$0.53$0.530
1991-04-17$0.53$0.53800
1991-04-16$0.44$0.440
1991-04-15$0.44$0.4411,200
1991-04-12$0.53$0.532,000
1991-04-11$0.50$0.500
1991-04-10$0.50$0.5036,800
1991-04-09$0.44$0.447,200
1991-04-08$0.47$0.470
1991-04-05$0.47$0.478,800
1991-04-04$0.47$0.470
1991-04-03$0.47$0.478,400
1991-04-02$0.56$0.560
1991-04-01$0.56$0.561,600
1991-03-28$0.47$0.47800
1991-03-27$0.47$0.470
1991-03-26$0.47$0.470
1991-03-25$0.47$0.470
1991-03-22$0.47$0.474,800
1991-03-21$0.47$0.470
1991-03-20$0.47$0.470
1991-03-19$0.47$0.470
1991-03-18$0.47$0.470
1991-03-15$0.47$0.470
1991-03-14$0.47$0.470
1991-03-13$0.47$0.470
1991-03-12$0.47$0.473,200
1991-03-11$0.47$0.47400
1991-03-08$0.47$0.470
1991-03-07$0.47$0.47400
1991-03-06$0.56$0.56400
1991-03-05$0.56$0.5620,400
1991-03-04$0.47$0.476,400
1991-03-01$0.47$0.470
1991-02-28$0.47$0.472,000
1991-02-27$0.47$0.471,200
1991-02-26$0.53$0.5321,200
1991-02-25$0.47$0.470
1991-02-22$0.47$0.470
1991-02-21$0.47$0.470
1991-02-20$0.47$0.472,400
1991-02-19$0.50$0.504,400
1991-02-15$0.47$0.471,600
1991-02-14$0.47$0.474,000
1991-02-13$0.47$0.4728,800
1991-02-12$0.50$0.5015,200
1991-02-11$0.56$0.563,200
1991-02-08$0.50$0.5020,400
1991-02-07$0.53$0.5311,200
1991-02-06$0.44$0.444,000
1991-02-05$0.44$0.442,000
1991-02-04$0.50$0.509,600
1991-02-01$0.41$0.410
1991-01-31$0.41$0.410
1991-01-30$0.41$0.410
1991-01-29$0.41$0.417,600
1991-01-28$0.38$0.378,400
1991-01-25$0.38$0.370
1991-01-24$0.38$0.370
1991-01-23$0.38$0.376,400
1991-01-22$0.38$0.377,600
1991-01-21$0.44$0.440
1991-01-18$0.44$0.440
1991-01-17$0.44$0.440
1991-01-16$0.44$0.44800
1991-01-15$0.41$0.412,400
1991-01-14$0.38$0.370
1991-01-11$0.38$0.3710,800
1991-01-10$0.38$0.370
1991-01-09$0.38$0.370
1991-01-08$0.38$0.376,000
1991-01-07$0.44$0.440
1991-01-04$0.44$0.440
1991-01-03$0.44$0.440
1991-01-02$0.44$0.440