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 — 1980

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
1980-12-31$0.85$0.8527,600
1980-12-30$0.85$0.857,800
1980-12-29$0.88$0.8828,800
1980-12-26$0.88$0.882,400
1980-12-24$0.90$0.9030,000
1980-12-23$0.92$0.921,200
1980-12-22$0.92$0.925,400
1980-12-19$0.92$0.926,000
1980-12-18$0.92$0.9233,600
1980-12-17$0.94$0.9430,600
1980-12-16$0.96$0.9616,200
1980-12-15$0.96$0.9640,200
1980-12-12$0.88$0.8830,000
1980-12-11$0.83$0.833,000
1980-12-10$0.85$0.854,200
1980-12-09$0.83$0.838,400
1980-12-08$0.83$0.8331,200
1980-12-05$0.88$0.8812,600
1980-12-04$0.88$0.8810,800
1980-12-03$0.85$0.853,000
1980-12-02$0.81$0.817,800
1980-12-01$0.83$0.8326,400
1980-11-28$0.83$0.830
1980-11-26$0.83$0.834,800
1980-11-25$0.83$0.8326,400
1980-11-24$0.83$0.8312,000
1980-11-21$0.83$0.836,600
1980-11-20$0.83$0.8313,200
1980-11-19$0.83$0.8319,200
1980-11-18$0.83$0.8334,200
1980-11-17$0.83$0.8310,800
1980-11-14$0.85$0.856,600
1980-11-13$0.85$0.8566,000
1980-11-12$0.85$0.851,200
1980-11-11$0.85$0.8542,600
1980-11-10$0.85$0.8554,600
1980-11-07$0.85$0.8572,000
1980-11-06$0.88$0.8847,400
1980-11-05$0.90$0.9072,600
1980-11-03$0.90$0.9030,600
1980-10-31$0.85$0.8555,200
1980-10-30$0.88$0.8815,600
1980-10-29$0.90$0.9018,000
1980-10-28$0.90$0.9010,800
1980-10-27$0.89$0.8920,700
1980-10-24$0.96$0.9615,300
1980-10-23$0.94$0.94900
1980-10-22$0.96$0.969,900
1980-10-21$0.97$0.97900
1980-10-20$0.97$0.975,400
1980-10-17$0.99$0.999,900
1980-10-16$0.99$0.993,600
1980-10-15$0.99$0.9913,500
1980-10-14$0.99$0.99900
1980-10-13$0.99$0.992,700
1980-10-10$0.99$0.9911,700
1980-10-09$1.00$1.0051,300
1980-10-08$0.97$0.9718,000
1980-10-07$0.96$0.9618,000
1980-10-06$0.94$0.9424,300
1980-10-03$0.96$0.962,700
1980-10-02$0.96$0.961,800
1980-10-01$0.94$0.9411,700
1980-09-30$0.94$0.9422,500
1980-09-29$0.96$0.9618,900
1980-09-26$0.99$0.9936,000
1980-09-25$0.96$0.969,000
1980-09-24$0.96$0.9624,300
1980-09-23$0.96$0.9614,400
1980-09-22$0.96$0.9624,300
1980-09-19$0.96$0.9674,700
1980-09-18$0.97$0.9711,700
1980-09-17$0.96$0.9622,500
1980-09-16$0.96$0.9627,900
1980-09-15$0.96$0.961,800
1980-09-12$0.96$0.9617,100
1980-09-11$0.96$0.964,500
1980-09-10$0.96$0.9613,500
1980-09-09$0.96$0.9627,900
1980-09-08$0.97$0.9739,600
1980-09-05$0.96$0.9691,800
1980-09-04$0.89$0.8945,900
1980-09-03$0.90$0.9073,800
1980-09-02$0.85$0.8510,800
1980-08-29$0.83$0.8352,200
1980-08-28$0.82$0.8210,800
1980-08-27$0.82$0.8214,400
1980-08-26$0.82$0.829,000
1980-08-25$0.82$0.8238,700
1980-08-22$0.81$0.8122,500
1980-08-21$0.81$0.8121,600
1980-08-20$0.81$0.8114,400
1980-08-19$0.81$0.8135,100
1980-08-18$0.81$0.8124,300
1980-08-15$0.82$0.8247,700
1980-08-14$0.76$0.764,500
1980-08-13$0.76$0.7610,800
1980-08-12$0.78$0.7845,900
1980-08-11$0.82$0.8218,900
1980-08-08$0.83$0.8315,300
1980-08-07$0.83$0.83101,700
1980-08-06$0.81$0.8159,400
1980-08-05$0.76$0.7665,700
1980-08-04$0.79$0.7980,100
1980-08-01$0.76$0.76122,400
1980-07-31$0.68$0.6876,500
1980-07-30$0.67$0.6719,800
1980-07-29$0.64$0.6413,500
1980-07-28$0.64$0.6420,700
1980-07-25$0.63$0.6213,500
1980-07-24$0.65$0.6515,300
1980-07-23$0.67$0.6739,600
1980-07-22$0.67$0.6718,000
1980-07-21$0.67$0.6742,300
1980-07-18$0.65$0.6530,600
1980-07-17$0.60$0.6064,800
1980-07-16$0.56$0.566,300
1980-07-15$0.54$0.5422,500
1980-07-14$0.53$0.5336,900
1980-07-11$0.50$0.509,000
1980-07-10$0.51$0.5127,000
1980-07-09$0.50$0.509,000
1980-07-08$0.49$0.499,900
1980-07-07$0.49$0.491,800
1980-07-03$0.49$0.490
1980-07-02$0.49$0.490
1980-07-01$0.49$0.490
1980-06-30$0.49$0.491,800
1980-06-27$0.49$0.493,600
1980-06-26$0.49$0.49900
1980-06-25$0.49$0.4910,800
1980-06-24$0.47$0.470
1980-06-23$0.47$0.470
1980-06-20$0.47$0.470
1980-06-19$0.47$0.479,900
1980-06-18$0.47$0.4736,900
1980-06-17$0.47$0.473,600
1980-06-16$0.47$0.470
1980-06-13$0.47$0.477,200
1980-06-12$0.47$0.470
1980-06-11$0.47$0.470
1980-06-10$0.47$0.4712,600
1980-06-09$0.47$0.475,400
1980-06-06$0.47$0.4712,600
1980-06-05$0.47$0.474,500
1980-06-04$0.47$0.474,500
1980-06-03$0.47$0.479,000
1980-06-02$0.49$0.490
1980-05-30$0.49$0.493,600
1980-05-29$0.47$0.470
1980-05-28$0.47$0.473,600
1980-05-27$0.47$0.471,800
1980-05-23$0.47$0.472,700
1980-05-22$0.49$0.4914,400
1980-05-21$0.49$0.498,100
1980-05-20$0.50$0.509,000
1980-05-19$0.50$0.50144,000
1980-05-16$0.50$0.509,900
1980-05-15$0.50$0.500
1980-05-14$0.50$0.500
1980-05-13$0.50$0.50900
1980-05-12$0.51$0.510
1980-05-09$0.51$0.510
1980-05-08$0.51$0.510
1980-05-07$0.51$0.510
1980-05-06$0.51$0.510
1980-05-05$0.51$0.51900
1980-05-02$0.51$0.513,600
1980-05-01$0.51$0.519,900
1980-04-30$0.51$0.514,500
1980-04-29$0.51$0.510
1980-04-28$0.51$0.510
1980-04-25$0.51$0.510
1980-04-24$0.51$0.516,300
1980-04-23$0.53$0.530
1980-04-22$0.53$0.538,100
1980-04-21$0.53$0.530
1980-04-18$0.53$0.53900
1980-04-17$0.51$0.510
1980-04-16$0.51$0.5112,600
1980-04-15$0.54$0.540
1980-04-14$0.54$0.54900
1980-04-11$0.54$0.543,600
1980-04-10$0.54$0.54900
1980-04-09$0.54$0.541,800
1980-04-08$0.54$0.542,700
1980-04-07$0.54$0.542,700
1980-04-03$0.54$0.54900
1980-04-02$0.54$0.5455,800
1980-04-01$0.54$0.54900
1980-03-31$0.53$0.530
1980-03-28$0.53$0.5311,700
1980-03-27$0.53$0.5310,800
1980-03-26$0.56$0.5612,600
1980-03-25$0.56$0.565,400
1980-03-24$0.56$0.5623,400
1980-03-21$0.60$0.6051,300
1980-03-20$0.60$0.6020,700
1980-03-19$0.58$0.5814,400
1980-03-18$0.57$0.57226,800
1980-03-17$0.53$0.539,000