NASDAQ:ASYS | Historical Stock Price | AMTECH SYSTEMS INC

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
1983-08-09 to 2026-09-04
Data captured

Stock Price Chart

Blue: Split-adjusted close · Orange: Cumulative dividend-reinvested close

$0.95$1.88$3.70$7.31$14.44$28.521983-08-092026-08-27

Logarithmic scale. Both lines share the same starting value for the selected range.

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Historical Stock Price — 1990

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
1990-12-31$1.75$1.753,050
1990-12-28$1.75$1.75350
1990-12-27$1.75$1.750
1990-12-26$1.75$1.75300
1990-12-24$1.75$1.75200
1990-12-21$1.75$1.75450
1990-12-20$1.75$1.75250
1990-12-19$1.75$1.751,100
1990-12-18$1.75$1.756,550
1990-12-17$1.75$1.751,000
1990-12-14$1.75$1.750
1990-12-13$1.75$1.75100
1990-12-12$1.75$1.75450
1990-12-11$1.75$1.750
1990-12-10$1.75$1.751,750
1990-12-07$1.75$1.751,650
1990-12-06$1.75$1.750
1990-12-05$1.75$1.75500
1990-12-04$1.75$1.75100
1990-12-03$1.75$1.75100
1990-11-30$1.75$1.750
1990-11-29$1.75$1.753,050
1990-11-28$1.75$1.75550
1990-11-27$1.75$1.75500
1990-11-26$1.75$1.75250
1990-11-23$1.75$1.75500
1990-11-21$1.75$1.75500
1990-11-20$1.75$1.75250
1990-11-19$1.75$1.75250
1990-11-16$1.75$1.755,000
1990-11-15$1.75$1.75850
1990-11-14$1.75$1.7550
1990-11-13$1.75$1.750
1990-11-12$1.75$1.750
1990-11-09$1.75$1.75250
1990-11-08$1.75$1.751,000
1990-11-07$1.75$1.750
1990-11-06$1.75$1.75600
1990-11-05$1.75$1.75200
1990-11-02$1.75$1.753,500
1990-11-01$1.75$1.750
1990-10-31$1.75$1.75200
1990-10-30$1.75$1.75550
1990-10-29$1.75$1.75500
1990-10-26$1.75$1.75150
1990-10-25$2.00$2.00700
1990-10-24$2.00$2.000
1990-10-23$2.00$2.000
1990-10-22$2.00$2.001,750
1990-10-19$2.00$2.006,050
1990-10-18$2.00$2.00500
1990-10-17$2.00$2.000
1990-10-16$2.00$2.001,250
1990-10-15$2.00$2.00450
1990-10-12$2.00$2.00750
1990-10-11$2.00$2.000
1990-10-10$2.00$2.005,300
1990-10-09$2.00$2.004,250
1990-10-08$2.00$2.001,650
1990-10-05$2.00$2.000
1990-10-04$2.00$2.004,650
1990-10-03$2.25$2.250
1990-10-02$2.25$2.251,000
1990-10-01$2.00$2.000
1990-09-28$2.00$2.001,000
1990-09-27$2.00$2.00150
1990-09-26$2.00$2.002,500
1990-09-25$2.50$2.500
1990-09-24$2.50$2.500
1990-09-21$2.50$2.501,000
1990-09-20$2.75$2.757,000
1990-09-19$2.75$2.75150
1990-09-18$2.50$2.500
1990-09-17$2.50$2.501,950
1990-09-14$2.50$2.500
1990-09-13$2.50$2.501,000
1990-09-12$2.75$2.75550
1990-09-11$2.75$2.751,400
1990-09-10$2.75$2.750
1990-09-07$2.75$2.751,050
1990-09-06$2.75$2.757,400
1990-09-05$2.75$2.750
1990-09-04$2.75$2.75500
1990-08-31$2.75$2.750
1990-08-30$2.75$2.750
1990-08-29$2.75$2.751,000
1990-08-28$2.75$2.751,000
1990-08-27$2.75$2.753,000
1990-08-24$2.75$2.750
1990-08-23$2.75$2.750
1990-08-22$2.75$2.75250
1990-08-21$2.75$2.751,100
1990-08-20$2.75$2.755,000
1990-08-17$3.00$3.00250
1990-08-16$3.00$3.00300
1990-08-15$3.00$3.00150
1990-08-14$2.50$2.501,600
1990-08-13$3.00$3.001,500
1990-08-10$3.00$3.006,000
1990-08-09$3.00$3.00250
1990-08-08$3.25$3.25550
1990-08-07$3.25$3.250
1990-08-06$3.25$3.254,050
1990-08-03$3.25$3.25100
1990-08-02$3.25$3.2550
1990-08-01$3.50$3.500
1990-07-31$3.50$3.500
1990-07-30$3.50$3.500
1990-07-27$3.50$3.50250
1990-07-26$3.50$3.502,500
1990-07-25$3.50$3.506,500
1990-07-24$4.25$4.250
1990-07-23$4.25$4.250
1990-07-20$4.25$4.254,250
1990-07-19$4.50$4.50150
1990-07-18$4.50$4.50350
1990-07-17$4.50$4.503,550
1990-07-16$4.50$4.50250
1990-07-13$4.50$4.50100
1990-07-12$4.50$4.50750
1990-07-11$5.00$5.002,200
1990-07-10$4.75$4.752,500
1990-07-09$5.25$5.250
1990-07-06$5.25$5.25250
1990-07-05$5.25$5.250
1990-07-03$5.25$5.250
1990-07-02$5.25$5.251,250
1990-06-29$5.00$5.001,050
1990-06-28$5.75$5.753,150
1990-06-27$5.75$5.753,000
1990-06-26$5.75$5.75250
1990-06-25$5.75$5.75150
1990-06-22$5.50$5.507,900
1990-06-21$5.50$5.503,950
1990-06-20$5.50$5.503,000
1990-06-19$5.50$5.506,650
1990-06-18$5.25$5.254,200
1990-06-15$5.50$5.501,850
1990-06-14$5.50$5.504,200
1990-06-13$5.75$5.758,150
1990-06-12$6.00$6.0050
1990-06-11$6.00$6.00500
1990-06-08$6.00$6.00100
1990-06-07$6.00$6.003,600
1990-06-06$6.25$6.251,400
1990-06-05$6.00$6.000
1990-06-04$6.00$6.00650
1990-06-01$6.00$6.000
1990-05-31$6.00$6.002,500
1990-05-30$6.00$6.00300
1990-05-29$6.25$6.252,350
1990-05-25$6.25$6.256,500
1990-05-24$6.50$6.501,450
1990-05-23$6.50$6.502,200
1990-05-22$6.75$6.751,800
1990-05-21$6.50$6.50950
1990-05-18$6.50$6.50150
1990-05-17$6.50$6.502,750
1990-05-16$6.50$6.503,750
1990-05-15$6.50$6.501,000
1990-05-14$6.50$6.50500
1990-05-11$6.50$6.501,250
1990-05-10$6.50$6.501,450
1990-05-09$6.50$6.50400
1990-05-08$6.50$6.501,900
1990-05-07$6.75$6.751,700
1990-05-04$6.50$6.502,950
1990-05-03$6.75$6.75650
1990-05-02$7.00$7.001,300
1990-05-01$7.00$7.003,750
1990-04-30$7.00$7.002,500
1990-04-27$7.00$7.00300
1990-04-26$7.00$7.004,250
1990-04-25$7.00$7.003,650
1990-04-24$7.00$7.00600
1990-04-23$7.00$7.00300
1990-04-20$7.00$7.00750
1990-04-19$7.00$7.00550
1990-04-18$7.00$7.00350
1990-04-17$7.00$7.002,750
1990-04-16$7.00$7.00700
1990-04-12$7.00$7.000
1990-04-11$7.00$7.001,050
1990-04-10$7.25$7.25350
1990-04-09$7.25$7.251,700
1990-04-06$7.00$7.000
1990-04-05$7.00$7.000
1990-04-04$7.00$7.001,450
1990-04-03$7.25$7.251,050
1990-04-02$7.25$7.254,000
1990-03-30$7.25$7.250
1990-03-29$7.25$7.250
1990-03-28$7.25$7.25300
1990-03-27$7.25$7.251,450
1990-03-26$7.25$7.254,250
1990-03-23$7.25$7.254,000
1990-03-22$7.25$7.253,950
1990-03-21$7.25$7.250
1990-03-20$7.25$7.251,550
1990-03-19$7.25$7.256,250
1990-03-16$7.00$7.002,850
1990-03-15$7.00$7.00950
1990-03-14$7.00$7.00700
1990-03-13$7.00$7.003,700
1990-03-12$7.25$7.25150
1990-03-09$7.25$7.25650
1990-03-08$7.25$7.251,000
1990-03-07$7.25$7.25750
1990-03-06$7.25$7.253,950
1990-03-05$7.00$7.003,300
1990-03-02$6.75$6.751,700
1990-03-01$6.75$6.7517,000
1990-02-28$6.25$6.251,300
1990-02-27$6.00$6.000
1990-02-26$6.00$6.000
1990-02-23$6.00$6.00150
1990-02-22$6.00$6.00200
1990-02-21$6.25$6.252,250
1990-02-20$6.50$6.501,750
1990-02-16$6.75$6.75400
1990-02-15$6.75$6.751,300
1990-02-14$6.75$6.751,450
1990-02-13$6.50$6.503,200
1990-02-12$6.50$6.500
1990-02-09$6.50$6.501,900
1990-02-08$6.25$6.250
1990-02-07$6.25$6.250
1990-02-06$6.25$6.25100
1990-02-05$6.25$6.254,650
1990-02-02$6.00$6.000
1990-02-01$6.00$6.00550
1990-01-31$6.00$6.000
1990-01-30$6.00$6.001,500
1990-01-29$6.00$6.00200
1990-01-26$6.00$6.003,950
1990-01-25$6.50$6.501,550
1990-01-24$6.25$6.257,800
1990-01-23$6.75$6.756,800
1990-01-22$7.00$7.009,950
1990-01-19$7.00$7.00600
1990-01-18$7.00$7.001,300
1990-01-17$7.00$7.001,050
1990-01-16$7.00$7.002,000
1990-01-15$7.00$7.000
1990-01-12$7.00$7.001,000
1990-01-11$7.25$7.2550
1990-01-10$7.25$7.251,250
1990-01-09$7.50$7.502,800
1990-01-08$8.00$8.00650
1990-01-05$8.00$8.00150
1990-01-04$8.00$8.0050
1990-01-03$8.00$8.0050
1990-01-02$8.00$8.001,750