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 — 1988

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
1988-12-30$0.97$0.9723,200
1988-12-29$1.00$1.0029,200
1988-12-28$1.00$1.0016,800
1988-12-27$1.00$1.004,800
1988-12-23$1.00$1.003,200
1988-12-22$1.03$1.038,000
1988-12-21$1.06$1.0657,200
1988-12-20$1.06$1.0636,800
1988-12-19$1.06$1.0612,800
1988-12-16$1.06$1.06400
1988-12-15$1.06$1.0619,600
1988-12-14$1.03$1.0333,200
1988-12-13$1.03$1.0348,000
1988-12-12$1.03$1.0348,800
1988-12-09$1.03$1.03194,000
1988-12-08$1.03$1.0321,600
1988-12-07$1.03$1.0349,600
1988-12-06$0.97$0.9760,400
1988-12-05$0.94$0.949,600
1988-12-02$0.97$0.9716,000
1988-12-01$0.94$0.944,800
1988-11-30$0.94$0.9422,000
1988-11-29$0.97$0.972,800
1988-11-28$0.94$0.9412,800
1988-11-25$1.00$1.008,400
1988-11-23$1.03$1.031,600
1988-11-22$1.03$1.035,600
1988-11-21$1.03$1.036,800
1988-11-18$1.06$1.061,600
1988-11-17$1.03$1.031,200
1988-11-16$1.06$1.0629,600
1988-11-15$1.00$1.009,200
1988-11-14$1.00$1.009,600
1988-11-11$1.00$1.007,200
1988-11-10$1.00$1.0037,200
1988-11-09$1.03$1.030
1988-11-08$1.03$1.034,800
1988-11-07$1.03$1.0330,400
1988-11-04$1.03$1.038,000
1988-11-03$1.09$1.0920,000
1988-11-02$1.09$1.095,200
1988-11-01$1.09$1.0921,600
1988-10-31$1.09$1.0945,600
1988-10-28$1.09$1.0932,400
1988-10-27$1.03$1.0316,000
1988-10-26$1.03$1.035,200
1988-10-25$1.06$1.067,200
1988-10-24$1.03$1.036,800
1988-10-21$1.03$1.0314,400
1988-10-20$1.09$1.0920,400
1988-10-19$1.13$1.1238,400
1988-10-18$1.06$1.061,200
1988-10-17$1.13$1.122,400
1988-10-14$1.09$1.0914,400
1988-10-13$1.13$1.1210,000
1988-10-12$1.09$1.090
1988-10-11$1.09$1.0918,400
1988-10-10$1.16$1.1659,200
1988-10-07$1.19$1.19208,800
1988-10-06$1.13$1.127,600
1988-10-05$1.16$1.169,600
1988-10-04$1.13$1.12400
1988-10-03$1.19$1.194,400
1988-09-30$1.19$1.1910,000
1988-09-29$1.16$1.168,000
1988-09-28$1.16$1.1619,600
1988-09-27$1.16$1.163,200
1988-09-26$1.13$1.125,200
1988-09-23$1.13$1.1216,400
1988-09-22$1.16$1.1612,400
1988-09-21$1.13$1.126,800
1988-09-20$1.13$1.124,800
1988-09-19$1.13$1.1217,200
1988-09-16$1.13$1.1221,200
1988-09-15$1.13$1.1222,000
1988-09-14$1.19$1.1924,000
1988-09-13$1.19$1.190
1988-09-12$1.19$1.190
1988-09-09$1.19$1.192,800
1988-09-08$1.16$1.1611,200
1988-09-07$1.16$1.164,400
1988-09-06$1.16$1.162,000
1988-09-02$1.16$1.1611,600
1988-09-01$1.19$1.1919,200
1988-08-31$1.22$1.2291,600
1988-08-30$1.16$1.165,600
1988-08-29$1.16$1.164,800
1988-08-26$1.16$1.165,600
1988-08-25$1.22$1.2213,200
1988-08-24$1.22$1.2216,000
1988-08-23$1.22$1.2224,000
1988-08-22$1.28$1.2838,000
1988-08-19$1.22$1.226,400
1988-08-18$1.22$1.2212,000
1988-08-17$1.22$1.2242,800
1988-08-16$1.25$1.25121,600
1988-08-15$1.28$1.28126,800
1988-08-12$1.41$1.4153,200
1988-08-11$1.38$1.37300,400
1988-08-10$1.38$1.37412,800
1988-08-09$1.16$1.1637,200
1988-08-08$1.19$1.196,800
1988-08-05$1.22$1.2261,600
1988-08-04$1.22$1.2212,000
1988-08-03$1.22$1.2250,000
1988-08-02$1.19$1.191,200
1988-08-01$1.19$1.19800
1988-07-29$1.25$1.254,000
1988-07-28$1.22$1.229,600
1988-07-27$1.28$1.28164,400
1988-07-26$1.25$1.254,400
1988-07-25$1.25$1.258,800
1988-07-22$1.22$1.2244,400
1988-07-21$1.22$1.222,800
1988-07-20$1.22$1.222,000
1988-07-19$1.22$1.2221,600
1988-07-18$1.22$1.2214,800
1988-07-15$1.19$1.19800
1988-07-14$1.25$1.254,400
1988-07-13$1.19$1.193,200
1988-07-12$1.19$1.19102,400
1988-07-11$1.22$1.2238,800
1988-07-08$1.28$1.2871,600
1988-07-07$1.22$1.2238,800
1988-07-06$1.25$1.2597,200
1988-07-05$1.22$1.2242,800
1988-07-01$1.25$1.2516,800
1988-06-30$1.25$1.2553,200
1988-06-29$1.22$1.2258,000
1988-06-28$1.22$1.2211,600
1988-06-27$1.22$1.2212,800
1988-06-24$1.22$1.2221,600
1988-06-23$1.22$1.228,800
1988-06-22$1.22$1.2226,800
1988-06-21$1.28$1.2865,200
1988-06-20$1.19$1.1922,000
1988-06-17$1.25$1.251,200
1988-06-16$1.22$1.2231,200
1988-06-15$1.16$1.164,000
1988-06-14$1.22$1.2218,800
1988-06-13$1.19$1.195,600
1988-06-10$1.16$1.1624,800
1988-06-09$1.25$1.255,600
1988-06-08$1.16$1.1642,800
1988-06-07$1.16$1.1610,800
1988-06-06$1.16$1.160
1988-06-03$1.16$1.1626,400
1988-06-02$1.25$1.2513,200
1988-06-01$1.25$1.25151,600
1988-05-31$1.16$1.1632,800
1988-05-27$1.16$1.164,000
1988-05-26$1.22$1.222,000
1988-05-25$1.16$1.1617,200
1988-05-24$1.16$1.162,000
1988-05-23$1.19$1.1910,800
1988-05-20$1.22$1.22800
1988-05-19$1.16$1.164,400
1988-05-18$1.16$1.1686,000
1988-05-17$1.25$1.2575,600
1988-05-16$1.22$1.2244,400
1988-05-13$1.25$1.25102,400
1988-05-12$1.22$1.2211,200
1988-05-11$1.25$1.25134,400
1988-05-10$1.22$1.2217,200
1988-05-09$1.25$1.258,400
1988-05-06$1.22$1.2242,400
1988-05-05$1.25$1.2550,400
1988-05-04$1.25$1.2524,400
1988-05-03$1.22$1.22286,400
1988-05-02$1.16$1.1678,400
1988-04-29$1.22$1.2242,000
1988-04-28$1.19$1.1925,600
1988-04-27$1.16$1.168,000
1988-04-26$1.16$1.1630,000
1988-04-25$1.19$1.1948,800
1988-04-22$1.16$1.1622,400
1988-04-21$1.16$1.1637,600
1988-04-20$1.19$1.19106,400
1988-04-19$1.22$1.22142,800
1988-04-18$1.16$1.16129,600
1988-04-15$1.03$1.0313,200
1988-04-14$1.03$1.0367,200
1988-04-13$1.00$1.008,800
1988-04-12$0.97$0.9732,800
1988-04-11$1.03$1.0318,800
1988-04-08$0.97$0.970
1988-04-07$0.97$0.970
1988-04-06$0.97$0.976,400
1988-04-05$0.97$0.971,200
1988-04-04$0.97$0.975,600
1988-03-31$0.97$0.977,200
1988-03-30$0.97$0.974,400
1988-03-29$1.00$1.00400
1988-03-28$1.00$1.008,000
1988-03-25$1.00$1.0028,000
1988-03-24$1.00$1.002,400
1988-03-23$1.03$1.036,400
1988-03-22$1.03$1.039,200
1988-03-21$1.00$1.0022,000
1988-03-18$1.00$1.0016,000
1988-03-17$1.00$1.0032,400
1988-03-16$1.00$1.0012,800
1988-03-15$1.03$1.0335,200
1988-03-14$1.03$1.0324,400
1988-03-11$1.03$1.03100,400
1988-03-10$1.03$1.0366,800
1988-03-09$1.03$1.033,600
1988-03-08$1.03$1.0326,000
1988-03-07$1.03$1.036,000
1988-03-04$1.06$1.066,400
1988-03-03$1.03$1.038,800
1988-03-02$1.03$1.032,800
1988-03-01$1.06$1.0610,800
1988-02-29$1.09$1.096,800
1988-02-26$1.09$1.0928,800
1988-02-25$1.03$1.03400
1988-02-24$1.03$1.0336,000
1988-02-23$1.06$1.069,600
1988-02-22$1.03$1.0321,600
1988-02-19$1.00$1.002,000
1988-02-18$1.00$1.0016,400
1988-02-17$1.06$1.062,800
1988-02-16$1.00$1.0013,600
1988-02-12$1.00$1.0012,800
1988-02-11$1.06$1.0626,800
1988-02-10$1.06$1.064,000
1988-02-09$1.03$1.0318,000
1988-02-08$1.00$1.009,600
1988-02-05$1.06$1.0611,200
1988-02-04$1.06$1.062,000
1988-02-03$1.06$1.0632,400
1988-02-02$1.09$1.0949,200
1988-02-01$1.09$1.0962,400
1988-01-29$1.16$1.1667,200
1988-01-28$1.16$1.1610,000
1988-01-27$1.16$1.1612,800
1988-01-26$1.16$1.1637,600
1988-01-25$1.03$1.0343,200
1988-01-22$1.09$1.0962,000
1988-01-21$0.91$0.917,600
1988-01-20$0.97$0.97102,800
1988-01-19$0.94$0.9418,000
1988-01-18$0.94$0.9458,800
1988-01-15$0.88$0.888,400
1988-01-14$0.84$0.842,400
1988-01-13$0.84$0.8416,000
1988-01-12$0.88$0.88800
1988-01-11$0.81$0.8125,200
1988-01-08$0.91$0.914,400
1988-01-07$0.94$0.9412,400
1988-01-06$0.97$0.974,000
1988-01-05$0.97$0.9722,800
1988-01-04$0.91$0.911,600