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.

View year

Historical Stock Price — 1985

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
1985-12-31$0.28$0.280
1985-12-30$0.28$0.280
1985-12-27$0.28$0.280
1985-12-26$0.28$0.280
1985-12-24$0.28$0.280
1985-12-23$0.28$0.280
1985-12-20$0.28$0.280
1985-12-19$0.28$0.280
1985-12-18$0.28$0.280
1985-12-17$0.28$0.280
1985-12-16$0.28$0.280
1985-12-13$0.28$0.280
1985-12-12$0.28$0.280
1985-12-11$0.28$0.280
1985-12-10$0.28$0.280
1985-12-09$0.28$0.280
1985-12-06$0.28$0.280
1985-12-05$0.28$0.280
1985-12-04$0.28$0.280
1985-12-03$0.28$0.280
1985-12-02$0.28$0.280
1985-11-29$0.28$0.280
1985-11-27$0.28$0.280
1985-11-26$0.28$0.280
1985-11-25$0.28$0.280
1985-11-22$0.28$0.280
1985-11-21$0.28$0.280
1985-11-20$0.28$0.280
1985-11-19$0.28$0.280
1985-11-18$0.28$0.280
1985-11-15$0.28$0.280
1985-11-14$0.28$0.280
1985-11-13$0.28$0.280
1985-11-12$0.28$0.280
1985-11-11$0.28$0.280
1985-11-08$0.28$0.280
1985-11-07$0.28$0.280
1985-11-06$0.28$0.280
1985-11-05$0.28$0.280
1985-11-04$0.28$0.280
1985-11-01$0.28$0.280
1985-10-31$0.28$0.280
1985-10-30$0.28$0.280
1985-10-29$0.28$0.280
1985-10-28$0.28$0.280
1985-10-25$0.28$0.280
1985-10-24$0.28$0.280
1985-10-23$0.28$0.280
1985-10-22$0.28$0.280
1985-10-21$0.28$0.280
1985-10-18$0.28$0.280
1985-10-17$0.28$0.280
1985-10-16$0.28$0.280
1985-10-15$0.28$0.280
1985-10-14$0.28$0.280
1985-10-11$0.28$0.280
1985-10-10$0.28$0.280
1985-10-09$0.28$0.280
1985-10-08$0.28$0.280
1985-10-07$0.28$0.280
1985-10-04$0.28$0.280
1985-10-03$0.28$0.280
1985-10-02$0.28$0.280
1985-10-01$0.28$0.280
1985-09-30$0.28$0.280
1985-09-26$0.28$0.280
1985-09-25$0.28$0.280
1985-09-24$0.28$0.280
1985-09-23$0.28$0.280
1985-09-20$0.28$0.280
1985-09-19$0.28$0.280
1985-09-18$0.28$0.280
1985-09-17$0.28$0.280
1985-09-16$0.28$0.280
1985-09-13$0.28$0.280
1985-09-12$0.28$0.280
1985-09-11$0.28$0.280
1985-09-10$0.28$0.280
1985-09-09$0.28$0.280
1985-09-06$0.28$0.280
1985-09-05$0.28$0.280
1985-09-04$0.28$0.280
1985-09-03$0.28$0.280
1985-08-30$0.28$0.280
1985-08-29$0.28$0.280
1985-08-28$0.28$0.280
1985-08-27$0.28$0.280
1985-08-26$0.28$0.280
1985-08-23$0.28$0.280
1985-08-22$0.28$0.280
1985-08-21$0.28$0.280
1985-08-20$0.28$0.280
1985-08-19$0.28$0.280
1985-08-16$0.28$0.280
1985-08-15$0.28$0.280
1985-08-14$0.28$0.280
1985-08-13$0.28$0.280
1985-08-12$0.28$0.280
1985-08-09$0.28$0.280
1985-08-08$0.28$0.280
1985-08-07$0.28$0.280
1985-08-06$0.28$0.280
1985-08-05$0.28$0.280
1985-08-02$0.28$0.280
1985-08-01$0.28$0.280
1985-07-31$0.28$0.280
1985-07-30$0.28$0.280
1985-07-29$0.28$0.280
1985-07-26$0.28$0.280
1985-07-25$0.28$0.280
1985-07-24$0.28$0.280
1985-07-23$0.28$0.280
1985-07-22$0.28$0.280
1985-07-19$0.28$0.280
1985-07-18$0.28$0.280
1985-07-17$0.28$0.280
1985-07-16$0.28$0.280
1985-07-15$0.28$0.280
1985-07-12$0.28$0.280
1985-07-11$0.28$0.280
1985-07-10$0.28$0.280
1985-07-09$0.28$0.280
1985-07-08$0.28$0.280
1985-07-05$0.28$0.280
1985-07-03$0.28$0.280
1985-07-02$0.28$0.280
1985-07-01$0.28$0.280
1985-06-28$0.28$0.280
1985-06-27$0.28$0.280
1985-06-26$0.28$0.280
1985-06-25$0.28$0.280
1985-06-24$0.28$0.280
1985-06-21$0.28$0.280
1985-06-20$0.28$0.280
1985-06-19$0.28$0.280
1985-06-18$0.28$0.280
1985-06-17$0.28$0.280
1985-06-14$0.28$0.280
1985-06-13$0.28$0.280
1985-06-12$0.28$0.280
1985-06-11$0.28$0.280
1985-06-10$0.28$0.280
1985-06-07$0.28$0.280
1985-06-06$0.28$0.280
1985-06-05$0.28$0.280
1985-06-04$0.28$0.280
1985-06-03$0.28$0.280
1985-05-31$0.28$0.280
1985-05-30$0.28$0.280
1985-05-29$0.28$0.280
1985-05-28$0.28$0.280
1985-05-24$0.28$0.280
1985-05-23$0.28$0.280
1985-05-22$0.28$0.280
1985-05-21$0.28$0.280
1985-05-20$0.28$0.280
1985-05-17$0.28$0.280
1985-05-16$0.28$0.280
1985-05-15$0.28$0.280
1985-05-14$0.28$0.280
1985-05-13$0.28$0.280
1985-05-10$0.28$0.280
1985-05-09$0.28$0.280
1985-05-08$0.28$0.280
1985-05-07$0.28$0.280
1985-05-06$0.28$0.280
1985-05-03$0.28$0.280
1985-05-02$0.28$0.280
1985-05-01$0.28$0.280
1985-04-30$0.28$0.280
1985-04-29$0.28$0.280
1985-04-26$0.28$0.280
1985-04-25$0.28$0.280
1985-04-24$0.28$0.280
1985-04-23$0.28$0.280
1985-04-22$0.28$0.280
1985-04-19$0.28$0.2811,600
1985-04-18$0.28$0.284,800
1985-04-17$0.28$0.2848,000
1985-04-16$0.28$0.2853,600
1985-04-15$0.34$0.3422,000
1985-04-12$0.38$0.372,800
1985-04-11$0.38$0.371,600
1985-04-10$0.38$0.378,000
1985-04-09$0.41$0.413,600
1985-04-08$0.41$0.410
1985-04-04$0.41$0.41400
1985-04-03$0.41$0.412,400
1985-04-02$0.41$0.411,200
1985-04-01$0.41$0.410
1985-03-29$0.41$0.414,000
1985-03-28$0.41$0.411,200
1985-03-27$0.41$0.4113,600
1985-03-26$0.41$0.4111,600
1985-03-25$0.44$0.4412,400
1985-03-22$0.41$0.410
1985-03-21$0.41$0.413,200
1985-03-20$0.41$0.4118,000
1985-03-19$0.41$0.416,800
1985-03-18$0.38$0.371,200
1985-03-15$0.38$0.3718,000
1985-03-14$0.34$0.341,200
1985-03-13$0.34$0.343,200
1985-03-12$0.34$0.340
1985-03-11$0.34$0.340
1985-03-08$0.34$0.344,000
1985-03-07$0.34$0.3421,200
1985-03-06$0.41$0.4118,400
1985-03-05$0.41$0.41400
1985-03-04$0.41$0.4114,800
1985-03-01$0.41$0.410
1985-02-28$0.41$0.4127,600
1985-02-27$0.34$0.3426,400
1985-02-26$0.41$0.411,600
1985-02-25$0.34$0.344,400
1985-02-22$0.38$0.3740,000
1985-02-21$0.38$0.371,600
1985-02-20$0.38$0.3715,600
1985-02-19$0.38$0.371,200
1985-02-15$0.44$0.4440,000
1985-02-14$0.44$0.4412,000
1985-02-13$0.41$0.4121,200
1985-02-12$0.44$0.4428,000
1985-02-11$0.47$0.4726,400
1985-02-08$0.44$0.44109,600
1985-02-07$0.47$0.4748,800
1985-02-06$0.41$0.41100,400
1985-02-05$0.38$0.3768,400
1985-02-04$0.31$0.3128,400
1985-02-01$0.28$0.2811,600
1985-01-31$0.25$0.2524,400
1985-01-30$0.25$0.255,600
1985-01-29$0.22$0.223,200
1985-01-28$0.22$0.228,800
1985-01-25$0.22$0.221,600
1985-01-24$0.22$0.2221,600
1985-01-23$0.22$0.2214,000
1985-01-22$0.22$0.2247,600
1985-01-21$0.22$0.229,600
1985-01-18$0.22$0.22245,200
1985-01-17$0.16$0.16151,600
1985-01-16$0.16$0.1613,200
1985-01-15$0.16$0.161,600
1985-01-14$0.16$0.1688,000
1985-01-11$0.16$0.160
1985-01-10$0.16$0.164,800
1985-01-09$0.19$0.191,200
1985-01-08$0.16$0.168,000
1985-01-07$0.19$0.191,200
1985-01-04$0.16$0.1618,400
1985-01-03$0.19$0.195,200
1985-01-02$0.19$0.196,800