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 — 1987

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
1987-12-31$0.88$0.8880,400
1987-12-30$0.88$0.8862,800
1987-12-29$0.84$0.84104,800
1987-12-28$0.84$0.8425,200
1987-12-24$0.91$0.9110,400
1987-12-23$0.91$0.9118,400
1987-12-22$0.91$0.9145,600
1987-12-21$0.91$0.9119,600
1987-12-18$0.94$0.94800
1987-12-17$0.94$0.9447,600
1987-12-16$0.94$0.9424,800
1987-12-15$0.88$0.8814,400
1987-12-14$0.88$0.8871,200
1987-12-11$0.84$0.8410,000
1987-12-10$0.81$0.812,800
1987-12-09$0.81$0.8121,200
1987-12-08$0.81$0.817,200
1987-12-07$0.81$0.818,400
1987-12-04$0.78$0.7811,600
1987-12-03$0.81$0.817,200
1987-12-02$0.81$0.816,000
1987-12-01$0.81$0.8164,000
1987-11-30$0.88$0.887,200
1987-11-27$0.88$0.880
1987-11-25$0.88$0.886,000
1987-11-24$0.84$0.8428,400
1987-11-23$0.91$0.912,400
1987-11-20$0.91$0.917,600
1987-11-19$0.91$0.9135,600
1987-11-18$0.94$0.9420,400
1987-11-17$0.94$0.9433,600
1987-11-16$0.94$0.9421,200
1987-11-13$0.97$0.97400
1987-11-12$0.97$0.9798,400
1987-11-11$0.94$0.9427,200
1987-11-10$0.94$0.9418,800
1987-11-09$0.97$0.9742,400
1987-11-06$0.94$0.9466,000
1987-11-05$0.97$0.978,000
1987-11-04$0.97$0.973,600
1987-11-03$0.94$0.9449,200
1987-11-02$1.00$1.0063,600
1987-10-30$0.91$0.9135,600
1987-10-29$0.81$0.8190,800
1987-10-28$0.75$0.7549,600
1987-10-27$0.78$0.7862,000
1987-10-26$0.81$0.8156,400
1987-10-23$0.94$0.94144,000
1987-10-22$0.94$0.9480,000
1987-10-21$1.00$1.00238,000
1987-10-20$0.81$0.8162,400
1987-10-19$1.06$1.0678,400
1987-10-16$1.25$1.25130,800
1987-10-15$1.38$1.3728,400
1987-10-14$1.41$1.4122,400
1987-10-13$1.41$1.416,400
1987-10-12$1.41$1.4119,600
1987-10-09$1.44$1.4443,600
1987-10-08$1.44$1.44353,600
1987-10-07$1.47$1.47254,000
1987-10-06$1.41$1.4116,800
1987-10-05$1.41$1.4130,800
1987-10-02$1.41$1.4129,200
1987-10-01$1.38$1.3728,400
1987-09-30$1.41$1.4171,600
1987-09-29$1.41$1.41101,200
1987-09-28$1.34$1.34338,400
1987-09-25$1.34$1.3451,600
1987-09-24$1.31$1.312,000
1987-09-23$1.31$1.310
1987-09-22$1.31$1.314,400
1987-09-21$1.31$1.3110,000
1987-09-18$1.34$1.3418,400
1987-09-17$1.22$1.228,000
1987-09-16$1.25$1.2580,000
1987-09-15$1.28$1.2824,000
1987-09-14$1.28$1.2835,200
1987-09-11$1.31$1.3112,400
1987-09-10$1.34$1.3412,000
1987-09-09$1.38$1.3738,000
1987-09-08$1.31$1.3133,600
1987-09-04$1.38$1.376,800
1987-09-03$1.38$1.378,800
1987-09-02$1.34$1.3421,200
1987-09-01$1.31$1.3121,600
1987-08-31$1.34$1.3411,200
1987-08-28$1.34$1.348,800
1987-08-27$1.34$1.345,600
1987-08-26$1.38$1.3716,400
1987-08-25$1.38$1.3758,400
1987-08-24$1.44$1.44146,400
1987-08-21$1.34$1.3424,000
1987-08-20$1.28$1.2840,400
1987-08-19$1.31$1.312,400
1987-08-18$1.38$1.3741,200
1987-08-17$1.41$1.41800
1987-08-14$1.41$1.4119,600
1987-08-13$1.41$1.4111,600
1987-08-12$1.38$1.376,000
1987-08-11$1.44$1.441,600
1987-08-10$1.44$1.4427,200
1987-08-07$1.44$1.4417,600
1987-08-06$1.53$1.5341,200
1987-08-05$1.56$1.5660,000
1987-08-04$1.53$1.5324,800
1987-08-03$1.50$1.5096,000
1987-07-31$1.56$1.5622,000
1987-07-30$1.56$1.5669,600
1987-07-29$1.53$1.5313,600
1987-07-28$1.50$1.5029,600
1987-07-27$1.41$1.414,800
1987-07-24$1.44$1.4433,600
1987-07-23$1.47$1.479,600
1987-07-22$1.50$1.5014,800
1987-07-21$1.50$1.5031,600
1987-07-20$1.47$1.4727,200
1987-07-17$1.41$1.4121,600
1987-07-16$1.41$1.4120,000
1987-07-15$1.41$1.4110,800
1987-07-14$1.41$1.4112,400
1987-07-13$1.50$1.5015,200
1987-07-10$1.47$1.4717,200
1987-07-09$1.44$1.4426,000
1987-07-08$1.44$1.4480,800
1987-07-07$1.31$1.3128,800
1987-07-06$1.31$1.3125,200
1987-07-02$1.28$1.2826,400
1987-07-01$1.25$1.25136,400
1987-06-30$1.31$1.3180,400
1987-06-29$1.25$1.25147,200
1987-06-26$1.13$1.1211,600
1987-06-25$1.13$1.126,800
1987-06-24$1.13$1.126,800
1987-06-23$1.19$1.1911,200
1987-06-22$1.13$1.125,600
1987-06-19$1.13$1.1214,400
1987-06-18$1.13$1.12800
1987-06-17$1.13$1.127,200
1987-06-16$1.13$1.1226,000
1987-06-15$1.19$1.1925,200
1987-06-12$1.19$1.190
1987-06-11$1.19$1.198,400
1987-06-10$1.13$1.124,800
1987-06-09$1.13$1.1210,400
1987-06-08$1.13$1.121,600
1987-06-05$1.13$1.1217,600
1987-06-04$1.16$1.1647,600
1987-06-03$1.16$1.1626,000
1987-06-02$1.13$1.1222,400
1987-06-01$1.13$1.1226,000
1987-05-29$1.06$1.0628,800
1987-05-28$0.97$0.972,000
1987-05-27$0.97$0.9790,000
1987-05-26$0.94$0.9437,200
1987-05-22$1.00$1.0016,400
1987-05-21$1.00$1.002,800
1987-05-20$1.00$1.0023,200
1987-05-19$1.03$1.033,600
1987-05-18$1.03$1.0324,800
1987-05-15$1.03$1.032,400
1987-05-14$1.03$1.0315,200
1987-05-13$1.03$1.033,600
1987-05-12$1.03$1.0312,400
1987-05-11$1.13$1.1213,200
1987-05-08$1.03$1.0344,000
1987-05-07$1.03$1.034,000
1987-05-06$1.03$1.036,000
1987-05-05$1.03$1.034,800
1987-05-04$1.03$1.0331,200
1987-05-01$1.09$1.0912,400
1987-04-30$1.13$1.1236,800
1987-04-29$1.13$1.12110,000
1987-04-28$1.13$1.124,000
1987-04-27$1.13$1.1234,400
1987-04-24$1.09$1.091,200
1987-04-23$1.16$1.16400
1987-04-22$1.16$1.165,600
1987-04-21$1.16$1.169,600
1987-04-20$1.13$1.1217,200
1987-04-16$1.09$1.096,000
1987-04-15$1.09$1.0932,400
1987-04-14$1.09$1.0924,800
1987-04-13$1.13$1.12400
1987-04-10$1.13$1.1212,400
1987-04-09$1.13$1.125,200
1987-04-08$1.13$1.121,600
1987-04-07$1.09$1.092,000
1987-04-06$1.09$1.097,200
1987-04-03$1.09$1.093,600
1987-04-02$1.13$1.1224,800
1987-04-01$1.13$1.1261,200
1987-03-31$1.19$1.1915,200
1987-03-30$1.13$1.1212,400
1987-03-27$1.16$1.1648,800
1987-03-26$1.19$1.1938,800
1987-03-25$1.16$1.1616,000
1987-03-24$1.16$1.1654,800
1987-03-23$1.13$1.1214,400
1987-03-20$1.13$1.1233,600
1987-03-19$1.13$1.1229,200
1987-03-18$1.09$1.091,600
1987-03-17$1.13$1.1242,800
1987-03-16$1.09$1.092,400
1987-03-13$1.13$1.1210,000
1987-03-12$1.09$1.0927,200
1987-03-11$1.09$1.097,600
1987-03-10$1.13$1.129,200
1987-03-09$1.13$1.128,000
1987-03-06$1.09$1.0924,000
1987-03-05$1.06$1.0611,600
1987-03-04$1.09$1.0940,400
1987-03-03$1.09$1.0952,800
1987-03-02$1.09$1.0935,200
1987-02-27$1.09$1.0912,800
1987-02-26$1.09$1.0910,000
1987-02-25$1.13$1.1222,000
1987-02-24$1.13$1.1218,800
1987-02-23$1.13$1.1210,800
1987-02-20$1.22$1.229,200
1987-02-19$1.16$1.1631,600
1987-02-18$1.22$1.226,400
1987-02-17$1.22$1.223,600
1987-02-13$1.28$1.287,600
1987-02-12$1.28$1.2812,000
1987-02-11$1.22$1.224,400
1987-02-10$1.22$1.22107,600
1987-02-09$1.19$1.1966,400
1987-02-06$1.25$1.25208,000
1987-02-05$1.13$1.12106,800
1987-02-04$1.16$1.1618,800
1987-02-03$1.16$1.1625,600
1987-02-02$1.13$1.1218,800
1987-01-30$1.16$1.162,800
1987-01-29$1.16$1.1612,000
1987-01-28$1.09$1.09800
1987-01-27$1.19$1.198,800
1987-01-26$1.16$1.1613,200
1987-01-23$1.22$1.2246,400
1987-01-22$1.22$1.226,000
1987-01-21$1.22$1.2234,800
1987-01-20$1.16$1.1610,800
1987-01-19$1.16$1.162,000
1987-01-16$1.16$1.168,800
1987-01-15$1.16$1.1612,000
1987-01-14$1.19$1.1916,800
1987-01-13$1.13$1.1226,800
1987-01-12$1.13$1.123,600
1987-01-09$1.19$1.196,800
1987-01-08$1.16$1.163,600
1987-01-07$1.13$1.125,200
1987-01-06$1.22$1.2243,200
1987-01-05$1.19$1.1915,600
1987-01-02$1.16$1.1610,800