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 — 1999

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
1999-12-31$3.72$3.720——
1999-12-30$3.72$3.729,200——
1999-12-29$3.50$3.502,800——
1999-12-28$3.69$3.691,600——
1999-12-27$3.66$3.665,600——
1999-12-23$3.72$3.723,200——
1999-12-22$3.72$3.720——
1999-12-21$3.72$3.7256,400——
1999-12-20$3.81$3.8177,200——
1999-12-17$3.78$3.7833,600——
1999-12-16$3.84$3.844,800——
1999-12-15$3.88$3.8786,800——
1999-12-14$3.78$3.78400——
1999-12-13$3.88$3.870——
1999-12-10$3.88$3.876,800——
1999-12-09$3.84$3.8472,400——
1999-12-08$3.81$3.810——
1999-12-07$3.81$3.813,600——
1999-12-06$3.81$3.8122,800——
1999-12-03$3.88$3.876,400——
1999-12-02$3.75$3.7596,800——
1999-12-01$3.72$3.7230,000——
1999-11-30$3.75$3.75108,400——
1999-11-29$3.72$3.7276,400——
1999-11-26$3.70$3.700——
1999-11-24$3.70$3.7052,400——
1999-11-23$3.70$3.7012,800——
1999-11-22$3.69$3.696,000——
1999-11-19$3.70$3.70800——
1999-11-18$3.69$3.693,200——
1999-11-17$3.69$3.699,600——
1999-11-16$3.67$3.6714,400——
1999-11-15$3.67$3.67106,000——
1999-11-12$3.69$3.696,800——
1999-11-11$3.70$3.7012,400——
1999-11-10$3.70$3.705,200——
1999-11-09$3.69$3.690——
1999-11-08$3.69$3.698,800——
1999-11-05$3.75$3.750——
1999-11-04$3.75$3.7552,800——
1999-11-03$3.56$3.565,200——
1999-11-02$3.44$3.448,800——
1999-11-01$3.44$3.4421,200——
1999-10-29$3.31$3.31800——
1999-10-28$3.34$3.340——
1999-10-27$3.34$3.3427,600——
1999-10-26$3.28$3.280——
1999-10-25$3.28$3.280——
1999-10-22$3.28$3.28127,600——
1999-10-21$3.13$3.124,400——
1999-10-20$3.13$3.12400——
1999-10-19$3.13$3.12800——
1999-10-18$3.13$3.120——
1999-10-15$3.13$3.12800——
1999-10-14$3.13$3.126,800——
1999-10-13$3.06$3.068,800——
1999-10-12$2.91$2.910——
1999-10-11$2.91$2.9111,200——
1999-10-08$2.81$2.8119,200——
1999-10-07$2.50$2.5050,800——
1999-10-06$2.39$2.3920,000——
1999-10-05$2.33$2.3316,400——
1999-10-04$2.31$2.3124,800——
1999-10-01$2.41$2.4119,200——
1999-09-30$2.66$2.6647,600——
1999-09-29$2.94$2.943,600——
1999-09-28$3.19$3.190——
1999-09-27$3.19$3.19800——
1999-09-24$3.50$3.502,800——
1999-09-23$3.16$3.160——
1999-09-22$3.16$3.160——
1999-09-21$3.16$3.167,600——
1999-09-20$3.45$3.450——
1999-09-17$3.45$3.45800——
1999-09-16$3.47$3.471,200——
1999-09-15$3.66$3.6636,800——
1999-09-14$3.53$3.532,000——
1999-09-13$3.63$3.620——
1999-09-10$3.63$3.620——
1999-09-09$3.63$3.621,600——
1999-09-08$3.63$3.624,400——
1999-09-07$3.53$3.534,400——
1999-09-03$3.69$3.6990,400——
1999-09-02$3.66$3.6643,600——
1999-09-01$3.53$3.530——
1999-08-31$3.53$3.530——
1999-08-30$3.53$3.53800——
1999-08-27$3.53$3.53800——
1999-08-26$3.56$3.561,200——
1999-08-25$3.53$3.53400——
1999-08-24$3.53$3.533,600——
1999-08-23$3.53$3.533,200——
1999-08-20$3.61$3.610——
1999-08-19$3.61$3.612,400——
1999-08-18$3.61$3.61400——
1999-08-17$3.59$3.59400——
1999-08-16$3.57$3.570——
1999-08-13$3.57$3.574,000——
1999-08-12$3.53$3.538,000——
1999-08-11$3.53$3.5392,800——
1999-08-10$3.50$3.5038,400——
1999-08-09$3.50$3.5054,000——
1999-08-06$3.22$3.2248,400——
1999-08-05$3.11$3.1113,600——
1999-08-04$3.09$3.09400——
1999-08-03$3.09$3.090——
1999-08-02$3.09$3.095,200——
1999-07-30$3.09$3.098,000——
1999-07-29$3.16$3.160——
1999-07-28$3.16$3.1614,800——
1999-07-27$3.03$3.03400——
1999-07-26$3.06$3.0686,400——
1999-07-23$3.00$3.00800——
1999-07-22$3.00$3.0023,200——
1999-07-21$3.00$3.008,000——
1999-07-20$3.00$3.002,000——
1999-07-19$3.00$3.003,600——
1999-07-16$3.00$3.005,600——
1999-07-15$3.00$3.0039,600——
1999-07-14$3.00$3.00800——
1999-07-13$3.00$3.008,000——
1999-07-12$3.00$3.003,600——
1999-07-09$3.00$3.000——
1999-07-08$3.00$3.0020,000——
1999-07-07$3.00$3.00400——
1999-07-06$3.00$3.002,000——
1999-07-02$3.00$3.000——
1999-07-01$3.00$3.00400——
1999-06-30$3.03$3.030——
1999-06-29$3.03$3.032,400——
1999-06-28$3.03$3.030——
1999-06-25$3.03$3.030——
1999-06-24$3.03$3.035,600——
1999-06-23$3.03$3.033,200——
1999-06-22$3.00$3.0010,400——
1999-06-21$3.00$3.000——
1999-06-18$3.00$3.0010,000——
1999-06-17$3.03$3.036,800——
1999-06-16$3.06$3.060——
1999-06-15$3.06$3.0666,800——
1999-06-14$3.13$3.120——
1999-06-11$3.13$3.120——
1999-06-10$3.13$3.120——
1999-06-09$3.13$3.120——
1999-06-08$3.13$3.120——
1999-06-07$3.13$3.1232,800——
1999-06-04$3.09$3.0925,600——
1999-06-03$3.03$3.030——
1999-06-02$3.03$3.030——
1999-06-01$3.03$3.03618,400——
1999-05-28$3.00$3.000——
1999-05-27$3.00$3.000——
1999-05-26$3.00$3.0012,800——
1999-05-25$3.06$3.0626,400——
1999-05-24$3.13$3.121,200——
1999-05-21$3.00$3.001,600——
1999-05-20$3.00$3.003,200——
1999-05-19$2.94$2.940——
1999-05-18$2.94$2.948,400——
1999-05-17$2.97$2.977,600——
1999-05-14$2.91$2.9130,800——
1999-05-13$3.06$3.06800——
1999-05-12$3.06$3.061,600——
1999-05-11$3.16$3.160——
1999-05-10$3.16$3.1628,800——
1999-05-07$3.16$3.162,400——
1999-05-06$3.16$3.1683,600——
1999-05-05$3.03$3.030——
1999-05-04$3.03$3.036,000——
1999-05-03$2.91$2.9119,600——
1999-04-30$2.78$2.78104,000——
1999-04-29$2.63$2.622,000——
1999-04-28$2.63$2.620——
1999-04-27$2.63$2.624,000——
1999-04-26$2.63$2.62800——
1999-04-23$2.63$2.6237,200——
1999-04-22$2.69$2.694,000——
1999-04-21$2.88$2.870——
1999-04-20$2.88$2.87130,000——
1999-04-19$2.94$2.9460,400——
1999-04-16$3.00$3.0022,000——
1999-04-15$3.00$3.00110,000——
1999-04-14$2.97$2.9721,600——
1999-04-13$2.78$2.782,000——
1999-04-12$2.69$2.692,400——
1999-04-09$2.63$2.6214,800——
1999-04-08$2.64$2.6413,200——
1999-04-07$2.48$2.4821,200——
1999-04-06$2.50$2.5023,600——
1999-04-05$2.31$2.3192,400——
1999-04-01$2.84$2.840——
1999-03-31$2.84$2.84111,600——
1999-03-30$2.88$2.874,000——
1999-03-29$2.97$2.970——
1999-03-26$2.97$2.970——
1999-03-25$2.97$2.9720,400——
1999-03-24$2.88$2.87400——
1999-03-23$2.88$2.871,600——
1999-03-22$2.88$2.87800——
1999-03-19$3.00$3.004,000——
1999-03-18$3.06$3.06800——
1999-03-17$2.88$2.8738,400——
1999-03-16$3.06$3.06188,800——
1999-03-15$3.03$3.03225,600——
1999-03-12$2.84$2.84400——
1999-03-11$3.00$3.0077,200——
1999-03-10$3.00$3.0018,000——
1999-03-09$3.06$3.0674,800——
1999-03-08$2.97$2.977,200——
1999-03-05$2.97$2.9718,800——
1999-03-04$3.00$3.003,600——
1999-03-03$3.09$3.091,600——
1999-03-02$3.00$3.002,000——
1999-03-01$2.91$2.9123,200——
1999-02-26$3.00$3.0013,600——
1999-02-25$2.91$2.918,800——
1999-02-24$3.00$3.003,200——
1999-02-23$3.09$3.0911,200——
1999-02-22$3.00$3.00800——
1999-02-19$3.13$3.1236,800——
1999-02-18$3.00$3.008,400——
1999-02-17$2.94$2.942,400——
1999-02-16$2.97$2.9713,600——
1999-02-12$2.88$2.870——
1999-02-11$2.88$2.871,200——
1999-02-10$2.88$2.872,400——
1999-02-09$2.91$2.9116,000——
1999-02-08$2.94$2.940——
1999-02-05$2.94$2.941,200——
1999-02-04$2.97$2.9730,400——
1999-02-03$2.91$2.9110,400——
1999-02-02$2.86$2.866,800——
1999-02-01$2.86$2.8610,800——
1999-01-29$2.84$2.845,200——
1999-01-28$2.84$2.8416,000——
1999-01-27$2.84$2.840——
1999-01-26$2.84$2.846,800——
1999-01-25$2.81$2.810——
1999-01-22$2.81$2.810——
1999-01-21$2.81$2.814,800——
1999-01-20$2.78$2.782,800——
1999-01-19$2.91$2.9153,200——
1999-01-15$2.78$2.7840,800——
1999-01-14$2.73$2.730——
1999-01-13$2.73$2.731,600——
1999-01-12$2.77$2.7794,800——
1999-01-11$2.77$2.7718,800——
1999-01-08$2.77$2.777,200——
1999-01-07$2.81$2.818,800——
1999-01-06$2.77$2.774,000——
1999-01-05$2.77$2.771,600——
1999-01-04$2.78$2.785,200——