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 — 1981

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
1981-12-31$1.63$1.6268,800
1981-12-30$1.63$1.6217,200
1981-12-29$1.63$1.6224,400
1981-12-28$1.63$1.6278,800
1981-12-24$1.72$1.726,000
1981-12-23$1.75$1.7517,600
1981-12-22$1.72$1.7248,800
1981-12-21$1.72$1.72279,600
1981-12-18$1.72$1.726,400
1981-12-17$1.72$1.7218,400
1981-12-16$1.72$1.7217,200
1981-12-15$1.75$1.7532,800
1981-12-14$1.75$1.7540,000
1981-12-11$1.75$1.7529,200
1981-12-10$1.75$1.7512,400
1981-12-09$1.72$1.7241,600
1981-12-08$1.72$1.727,200
1981-12-07$1.72$1.7239,600
1981-12-04$1.75$1.7518,800
1981-12-03$1.75$1.7539,200
1981-12-02$1.81$1.8114,800
1981-12-01$1.84$1.8412,000
1981-11-30$1.91$1.916,800
1981-11-27$1.94$1.947,200
1981-11-25$1.94$1.944,400
1981-11-24$2.00$2.0038,800
1981-11-23$2.00$2.0017,200
1981-11-20$2.06$2.0641,200
1981-11-19$2.03$2.0317,200
1981-11-18$2.03$2.035,600
1981-11-17$2.03$2.0339,200
1981-11-16$2.03$2.0336,400
1981-11-13$2.09$2.0927,600
1981-11-12$2.09$2.0957,600
1981-11-11$2.09$2.0919,600
1981-11-10$2.09$2.0964,000
1981-11-09$2.09$2.0940,800
1981-11-06$2.09$2.0972,000
1981-11-05$2.03$2.0352,800
1981-11-04$1.91$1.9184,000
1981-11-03$1.69$1.6964,400
1981-11-02$1.66$1.6626,400
1981-10-30$1.63$1.6262,000
1981-10-29$1.69$1.693,200
1981-10-28$1.69$1.6942,800
1981-10-27$1.69$1.6922,400
1981-10-26$1.75$1.7521,600
1981-10-23$1.75$1.7516,400
1981-10-22$1.75$1.7519,600
1981-10-21$1.75$1.7516,000
1981-10-20$1.75$1.7516,000
1981-10-19$1.72$1.7215,200
1981-10-16$1.72$1.7221,200
1981-10-15$1.72$1.728,800
1981-10-14$1.72$1.729,600
1981-10-13$1.72$1.7222,800
1981-10-12$1.72$1.727,600
1981-10-09$1.72$1.7230,400
1981-10-08$1.66$1.6613,200
1981-10-07$1.75$1.7556,000
1981-10-06$1.69$1.6930,000
1981-10-05$1.75$1.7518,400
1981-10-02$1.75$1.7525,200
1981-10-01$1.75$1.7513,200
1981-09-30$1.75$1.7513,200
1981-09-29$1.78$1.7839,200
1981-09-28$1.72$1.7234,800
1981-09-25$1.69$1.6935,600
1981-09-24$1.97$1.974,800
1981-09-23$1.97$1.9724,800
1981-09-22$2.13$2.1216,800
1981-09-21$2.16$2.1617,200
1981-09-18$2.19$2.1940,000
1981-09-17$2.13$2.1243,600
1981-09-16$2.28$2.2841,600
1981-09-15$2.31$2.3172,400
1981-09-14$2.25$2.2557,600
1981-09-11$2.28$2.2850,000
1981-09-10$2.06$2.0610,800
1981-09-09$2.06$2.0621,200
1981-09-08$2.00$2.0018,400
1981-09-04$2.06$2.0613,200
1981-09-03$2.00$2.0016,800
1981-09-02$2.00$2.0020,400
1981-09-01$1.97$1.9719,200
1981-08-31$2.00$2.0036,000
1981-08-28$2.22$2.2234,400
1981-08-27$2.09$2.0948,000
1981-08-26$1.91$1.9114,000
1981-08-25$1.88$1.8737,800
1981-08-24$1.96$1.9622,800
1981-08-21$2.06$2.0613,200
1981-08-20$2.08$2.0819,800
1981-08-19$2.06$2.0614,400
1981-08-18$2.06$2.0620,400
1981-08-17$2.10$2.1057,000
1981-08-14$2.25$2.2521,600
1981-08-13$2.31$2.3139,000
1981-08-12$2.29$2.2924,000
1981-08-11$2.31$2.319,600
1981-08-10$2.33$2.330
1981-08-07$2.33$2.3313,800
1981-08-06$2.33$2.3310,200
1981-08-05$2.35$2.3530,000
1981-08-04$2.33$2.3313,800
1981-08-03$2.35$2.3558,800
1981-07-31$2.42$2.42124,800
1981-07-30$2.46$2.4649,800
1981-07-29$2.46$2.4679,800
1981-07-28$2.35$2.3543,800
1981-07-27$2.33$2.3357,000
1981-07-24$2.21$2.2152,200
1981-07-23$2.15$2.157,200
1981-07-22$2.15$2.1544,400
1981-07-21$2.10$2.1035,400
1981-07-20$2.21$2.2137,800
1981-07-17$2.33$2.3316,800
1981-07-16$2.29$2.2938,400
1981-07-15$2.25$2.2518,000
1981-07-14$2.25$2.2517,400
1981-07-13$2.25$2.2515,600
1981-07-10$2.25$2.2529,400
1981-07-09$2.23$2.2320,400
1981-07-08$2.21$2.2147,400
1981-07-07$2.13$2.1229,400
1981-07-06$2.08$2.0872,600
1981-07-02$2.10$2.1061,800
1981-07-01$2.21$2.2152,200
1981-06-30$2.23$2.2366,600
1981-06-29$2.35$2.35154,800
1981-06-26$2.46$2.4669,000
1981-06-25$2.46$2.46268,200
1981-06-24$2.46$2.4621,600
1981-06-23$2.48$2.48101,400
1981-06-22$2.46$2.4691,200
1981-06-19$2.60$2.60133,200
1981-06-18$2.54$2.54237,000
1981-06-17$2.73$2.73123,600
1981-06-16$2.54$2.54228,600
1981-06-15$2.27$2.2729,400
1981-06-12$2.29$2.2912,000
1981-06-11$2.29$2.29111,600
1981-06-10$2.35$2.35135,000
1981-06-09$2.31$2.3160,600
1981-06-08$2.29$2.2985,200
1981-06-05$2.35$2.3588,800
1981-06-04$2.29$2.2982,200
1981-06-03$2.38$2.37166,800
1981-06-02$1.98$1.9875,600
1981-06-01$2.13$2.12100,200
1981-05-29$2.06$2.06133,200
1981-05-28$1.71$1.71172,800
1981-05-27$1.75$1.7546,800
1981-05-26$1.67$1.6711,400
1981-05-22$1.67$1.6716,200
1981-05-21$1.69$1.6955,200
1981-05-20$1.73$1.7367,200
1981-05-19$1.77$1.7730,000
1981-05-18$1.67$1.6726,400
1981-05-15$1.63$1.6225,200
1981-05-14$1.60$1.6012,600
1981-05-13$1.60$1.6039,000
1981-05-12$1.60$1.6031,800
1981-05-11$1.60$1.6031,200
1981-05-08$1.65$1.6548,000
1981-05-07$1.56$1.5643,800
1981-05-06$1.52$1.5268,400
1981-05-05$1.46$1.469,600
1981-05-04$1.46$1.4697,800
1981-05-01$1.52$1.52118,800
1981-04-30$1.42$1.4229,400
1981-04-29$1.42$1.4230,000
1981-04-28$1.42$1.4262,400
1981-04-27$1.44$1.4441,400
1981-04-24$1.40$1.4032,400
1981-04-23$1.35$1.35109,200
1981-04-22$1.27$1.2728,800
1981-04-21$1.27$1.2722,800
1981-04-20$1.25$1.2539,600
1981-04-16$1.27$1.2770,200
1981-04-15$1.21$1.21112,800
1981-04-14$1.13$1.1250,400
1981-04-13$1.10$1.1015,600
1981-04-10$1.08$1.0812,000
1981-04-09$1.08$1.0810,800
1981-04-08$1.08$1.0879,200
1981-04-07$1.17$1.1727,600
1981-04-06$1.15$1.1521,000
1981-04-03$1.17$1.1758,200
1981-04-02$1.15$1.1540,200
1981-04-01$1.15$1.1521,600
1981-03-31$1.17$1.17121,200
1981-03-30$1.17$1.17134,400
1981-03-27$1.06$1.0678,600
1981-03-26$1.02$1.02117,600
1981-03-25$0.94$0.9415,600
1981-03-24$0.92$0.9260,000
1981-03-23$0.90$0.9036,600
1981-03-20$0.90$0.9010,200
1981-03-19$0.90$0.9022,200
1981-03-18$0.92$0.9239,000
1981-03-17$0.94$0.9417,400
1981-03-16$0.94$0.946,000
1981-03-13$0.94$0.944,200
1981-03-12$0.94$0.9418,000
1981-03-11$0.92$0.9216,800
1981-03-10$0.98$0.9814,400
1981-03-09$1.00$1.004,800
1981-03-06$1.00$1.006,000
1981-03-05$1.00$1.004,800
1981-03-04$1.00$1.0036,000
1981-03-03$1.00$1.0034,200
1981-03-02$0.98$0.9814,400
1981-02-27$0.98$0.989,600
1981-02-26$0.98$0.9846,800
1981-02-25$0.94$0.9420,400
1981-02-24$0.92$0.927,200
1981-02-23$0.92$0.929,600
1981-02-20$0.92$0.9251,000
1981-02-19$0.94$0.9447,400
1981-02-18$0.94$0.947,800
1981-02-17$0.96$0.9619,200
1981-02-13$0.96$0.9618,000
1981-02-12$0.96$0.9624,000
1981-02-11$1.00$1.007,800
1981-02-10$1.02$1.024,200
1981-02-09$1.04$1.0411,400
1981-02-06$1.04$1.0428,800
1981-02-05$1.04$1.0419,800
1981-02-04$1.02$1.0231,800
1981-02-03$1.02$1.0219,800
1981-02-02$1.00$1.0072,000
1981-01-30$0.96$0.9622,800
1981-01-29$0.98$0.9818,600
1981-01-28$0.96$0.9624,600
1981-01-27$0.94$0.9412,000
1981-01-26$0.92$0.9230,600
1981-01-23$0.92$0.9212,600
1981-01-22$0.90$0.905,400
1981-01-21$0.90$0.9013,800
1981-01-20$0.88$0.8830,600
1981-01-19$0.83$0.836,000
1981-01-16$0.83$0.839,000
1981-01-15$0.81$0.8130,000
1981-01-14$0.79$0.793,000
1981-01-13$0.79$0.7918,000
1981-01-12$0.79$0.793,600
1981-01-09$0.79$0.790
1981-01-08$0.79$0.7913,800
1981-01-07$0.81$0.8164,800
1981-01-06$0.88$0.8821,000
1981-01-05$0.88$0.8824,600
1981-01-02$0.85$0.8529,400