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 — 1989

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
1989-12-29$1.09$1.0916,400
1989-12-28$1.13$1.1212,800
1989-12-27$1.13$1.1216,000
1989-12-26$1.16$1.16400
1989-12-22$1.16$1.1638,400
1989-12-21$1.19$1.1914,400
1989-12-20$1.19$1.19118,800
1989-12-19$1.19$1.1925,600
1989-12-18$1.25$1.25112,400
1989-12-15$1.25$1.2569,600
1989-12-14$1.19$1.1919,200
1989-12-13$1.22$1.2225,600
1989-12-12$1.22$1.2216,400
1989-12-11$1.22$1.22206,800
1989-12-08$1.22$1.2290,800
1989-12-07$1.19$1.19167,200
1989-12-06$1.22$1.2214,800
1989-12-05$1.16$1.1633,200
1989-12-04$1.16$1.1610,000
1989-12-01$1.16$1.1631,600
1989-11-30$1.16$1.16108,000
1989-11-29$1.13$1.120
1989-11-28$1.13$1.12110,800
1989-11-27$1.13$1.123,200
1989-11-24$1.13$1.1218,400
1989-11-22$1.13$1.1246,800
1989-11-21$1.13$1.1272,400
1989-11-20$1.13$1.1239,200
1989-11-17$1.13$1.1250,800
1989-11-16$1.13$1.1230,400
1989-11-15$1.13$1.1210,400
1989-11-14$1.13$1.1291,200
1989-11-13$1.13$1.1260,800
1989-11-10$1.13$1.1230,400
1989-11-09$1.09$1.091,600
1989-11-08$1.09$1.092,400
1989-11-07$1.16$1.16101,600
1989-11-06$1.09$1.0919,200
1989-11-03$1.09$1.09332,400
1989-11-02$1.09$1.098,800
1989-11-01$1.13$1.125,600
1989-10-31$1.19$1.1917,600
1989-10-30$1.19$1.196,400
1989-10-27$1.09$1.094,000
1989-10-26$1.09$1.0912,000
1989-10-25$1.13$1.1218,800
1989-10-24$1.16$1.1633,600
1989-10-23$1.16$1.1611,200
1989-10-20$1.16$1.1628,400
1989-10-19$1.13$1.1233,600
1989-10-18$1.09$1.0921,600
1989-10-17$1.06$1.0622,800
1989-10-16$1.06$1.0622,800
1989-10-13$1.06$1.0630,800
1989-10-12$1.06$1.0620,800
1989-10-11$1.09$1.09102,400
1989-10-10$1.00$1.002,000
1989-10-09$1.06$1.060
1989-10-06$1.06$1.0638,800
1989-10-05$1.00$1.006,000
1989-10-04$1.00$1.0018,800
1989-10-03$1.06$1.0633,200
1989-10-02$1.06$1.0615,600
1989-09-29$1.06$1.0612,400
1989-09-28$1.06$1.061,600
1989-09-27$1.06$1.0640,800
1989-09-26$1.03$1.036,800
1989-09-25$1.03$1.031,200
1989-09-22$1.06$1.0662,800
1989-09-21$1.09$1.0918,000
1989-09-20$1.03$1.032,400
1989-09-19$1.09$1.09400
1989-09-18$1.03$1.0312,000
1989-09-15$1.09$1.0922,800
1989-09-14$1.09$1.0958,400
1989-09-13$1.03$1.0316,800
1989-09-12$1.06$1.06120,000
1989-09-11$1.03$1.0316,800
1989-09-08$1.03$1.0387,600
1989-09-07$1.00$1.007,600
1989-09-06$1.00$1.0051,600
1989-09-05$0.97$0.9761,600
1989-09-01$1.03$1.0324,800
1989-08-31$1.03$1.0310,400
1989-08-30$0.97$0.978,400
1989-08-29$0.97$0.9784,800
1989-08-28$1.00$1.0024,400
1989-08-25$0.97$0.970
1989-08-24$0.97$0.9716,800
1989-08-23$0.94$0.946,000
1989-08-22$1.00$1.0066,800
1989-08-21$0.94$0.941,600
1989-08-18$0.94$0.9414,000
1989-08-17$1.00$1.0026,000
1989-08-16$1.00$1.0028,000
1989-08-15$0.97$0.9713,600
1989-08-14$0.94$0.9425,200
1989-08-11$1.00$1.0012,400
1989-08-10$1.00$1.007,600
1989-08-09$0.94$0.94148,400
1989-08-08$0.91$0.9145,200
1989-08-07$0.94$0.9430,000
1989-08-04$0.88$0.8832,400
1989-08-03$0.88$0.884,800
1989-08-02$0.88$0.886,800
1989-08-01$0.91$0.9114,400
1989-07-31$0.91$0.9121,600
1989-07-28$0.94$0.948,400
1989-07-27$0.88$0.882,800
1989-07-26$0.94$0.9422,800
1989-07-25$0.94$0.94800
1989-07-24$0.94$0.9431,600
1989-07-21$0.94$0.942,800
1989-07-20$0.88$0.8823,200
1989-07-19$0.94$0.948,800
1989-07-18$0.94$0.9428,000
1989-07-17$0.94$0.943,200
1989-07-14$0.94$0.9428,000
1989-07-13$0.91$0.9126,800
1989-07-12$0.91$0.915,200
1989-07-11$0.97$0.97800
1989-07-10$0.91$0.9110,800
1989-07-07$0.97$0.979,600
1989-07-06$0.97$0.97800
1989-07-05$0.97$0.97800
1989-07-03$0.91$0.912,000
1989-06-30$0.91$0.916,800
1989-06-29$0.91$0.914,000
1989-06-28$0.91$0.914,000
1989-06-27$0.94$0.944,400
1989-06-26$0.94$0.946,000
1989-06-23$1.00$1.000
1989-06-22$1.00$1.008,000
1989-06-21$0.97$0.9717,600
1989-06-20$0.97$0.972,000
1989-06-19$1.03$1.03800
1989-06-16$1.03$1.03175,200
1989-06-15$0.97$0.979,200
1989-06-14$1.03$1.038,000
1989-06-13$1.03$1.03205,200
1989-06-12$0.97$0.972,000
1989-06-09$0.97$0.978,400
1989-06-08$0.94$0.9421,600
1989-06-07$0.97$0.9716,000
1989-06-06$0.94$0.9498,800
1989-06-05$0.94$0.9424,400
1989-06-02$0.94$0.9453,200
1989-06-01$0.88$0.8836,000
1989-05-31$0.91$0.9152,800
1989-05-30$0.91$0.910
1989-05-26$0.91$0.911,200
1989-05-25$0.88$0.883,200
1989-05-24$0.88$0.8810,800
1989-05-23$0.84$0.849,600
1989-05-22$0.84$0.844,000
1989-05-19$0.84$0.849,200
1989-05-18$0.91$0.918,000
1989-05-17$0.84$0.8416,000
1989-05-16$0.88$0.884,000
1989-05-15$0.84$0.84400
1989-05-12$0.91$0.916,800
1989-05-11$0.81$0.8180,800
1989-05-10$0.91$0.914,000
1989-05-09$0.91$0.91400
1989-05-08$0.91$0.9112,400
1989-05-05$0.91$0.9127,200
1989-05-04$0.84$0.8465,600
1989-05-03$0.81$0.814,000
1989-05-02$0.81$0.812,800
1989-05-01$0.81$0.818,800
1989-04-28$0.81$0.8116,000
1989-04-27$0.81$0.818,800
1989-04-26$0.81$0.8120,000
1989-04-25$0.88$0.8860,800
1989-04-24$0.84$0.8459,600
1989-04-21$0.84$0.8427,600
1989-04-20$0.78$0.789,200
1989-04-19$0.81$0.8116,800
1989-04-18$0.81$0.8187,600
1989-04-17$0.84$0.847,600
1989-04-14$0.84$0.844,800
1989-04-13$0.84$0.842,400
1989-04-12$0.81$0.817,600
1989-04-11$0.75$0.7515,200
1989-04-10$0.81$0.819,600
1989-04-07$0.81$0.8111,600
1989-04-06$0.81$0.8117,200
1989-04-05$0.78$0.781,600
1989-04-04$0.78$0.7817,600
1989-04-03$0.81$0.814,400
1989-03-31$0.88$0.8866,800
1989-03-30$0.84$0.846,000
1989-03-29$0.84$0.842,000
1989-03-28$0.91$0.911,600
1989-03-27$0.84$0.8428,000
1989-03-23$0.88$0.8812,000
1989-03-22$0.84$0.8411,600
1989-03-21$0.84$0.846,000
1989-03-20$0.84$0.84800
1989-03-17$0.91$0.919,600
1989-03-16$0.88$0.8828,000
1989-03-15$0.88$0.881,200
1989-03-14$0.88$0.884,000
1989-03-13$0.88$0.882,000
1989-03-10$0.88$0.8816,000
1989-03-09$0.97$0.970
1989-03-08$0.97$0.9723,600
1989-03-07$0.91$0.917,600
1989-03-06$0.94$0.9429,200
1989-03-03$0.91$0.910
1989-03-02$0.91$0.916,800
1989-03-01$0.91$0.91800
1989-02-28$0.94$0.948,800
1989-02-27$0.97$0.97141,200
1989-02-24$0.91$0.91400
1989-02-23$0.91$0.910
1989-02-22$0.91$0.9113,200
1989-02-21$0.91$0.9122,800
1989-02-17$0.94$0.941,600
1989-02-16$0.94$0.948,000
1989-02-15$0.94$0.947,200
1989-02-14$0.94$0.944,400
1989-02-13$0.97$0.9746,400
1989-02-10$0.94$0.9410,000
1989-02-09$0.94$0.945,200
1989-02-08$0.94$0.942,800
1989-02-07$0.94$0.9418,000
1989-02-06$0.94$0.9417,200
1989-02-03$0.94$0.9478,800
1989-02-02$0.91$0.9123,600
1989-02-01$0.94$0.940
1989-01-31$0.94$0.9419,600
1989-01-30$0.94$0.9450,000
1989-01-27$0.97$0.9728,000
1989-01-26$1.00$1.008,000
1989-01-25$0.97$0.9713,600
1989-01-24$1.00$1.003,600
1989-01-23$0.97$0.9739,600
1989-01-20$1.00$1.0029,600
1989-01-19$0.97$0.97400
1989-01-18$1.00$1.007,600
1989-01-17$1.00$1.00400
1989-01-16$0.97$0.971,200
1989-01-13$1.00$1.005,600
1989-01-12$1.00$1.0032,800
1989-01-11$0.94$0.943,200
1989-01-10$0.94$0.942,400
1989-01-09$1.00$1.003,200
1989-01-06$1.00$1.006,000
1989-01-05$1.00$1.004,400
1989-01-04$0.94$0.942,400
1989-01-03$0.94$0.9416,000