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 — 1991

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
1991-12-31$3.00$3.00750
1991-12-30$3.00$3.00250
1991-12-27$3.00$3.000
1991-12-26$3.00$3.00150
1991-12-24$3.00$3.000
1991-12-23$3.00$3.0050
1991-12-20$3.00$3.00150
1991-12-19$3.00$3.00150
1991-12-18$2.50$2.500
1991-12-17$2.50$2.501,500
1991-12-16$2.50$2.503,750
1991-12-13$2.50$2.501,000
1991-12-12$2.25$2.25250
1991-12-11$2.25$2.25300
1991-12-10$2.25$2.2550
1991-12-09$2.50$2.5010,250
1991-12-06$2.50$2.50750
1991-12-05$2.50$2.501,550
1991-12-04$2.25$2.250
1991-12-03$2.25$2.251,400
1991-12-02$2.25$2.250
1991-11-29$2.25$2.25300
1991-11-27$2.25$2.257,000
1991-11-26$2.00$2.004,900
1991-11-25$2.00$2.0050
1991-11-22$2.00$2.00200
1991-11-21$2.00$2.004,000
1991-11-20$2.00$2.00150
1991-11-19$2.00$2.005,000
1991-11-18$2.00$2.00500
1991-11-15$2.00$2.00500
1991-11-14$2.00$2.003,500
1991-11-13$2.00$2.000
1991-11-12$2.00$2.000
1991-11-11$2.00$2.000
1991-11-08$2.00$2.00650
1991-11-07$2.00$2.0050
1991-11-06$2.00$2.0050
1991-11-05$2.00$2.000
1991-11-04$2.00$2.006,000
1991-11-01$2.00$2.00400
1991-10-31$2.00$2.0050
1991-10-30$2.00$2.0050
1991-10-29$2.00$2.00800
1991-10-28$2.00$2.000
1991-10-25$2.00$2.00350
1991-10-24$2.00$2.00200
1991-10-23$2.00$2.000
1991-10-22$2.00$2.000
1991-10-21$2.00$2.000
1991-10-18$2.00$2.00500
1991-10-17$2.00$2.004,750
1991-10-16$2.00$2.0050
1991-10-15$2.00$2.000
1991-10-14$2.00$2.000
1991-10-11$2.00$2.00150
1991-10-10$2.00$2.00300
1991-10-09$2.00$2.000
1991-10-08$2.00$2.000
1991-10-07$2.00$2.00100
1991-10-04$2.00$2.002,500
1991-10-03$2.00$2.00200
1991-10-02$2.00$2.000
1991-10-01$2.00$2.001,250
1991-09-30$2.00$2.001,650
1991-09-27$2.00$2.000
1991-09-26$2.00$2.000
1991-09-25$2.00$2.00500
1991-09-24$2.00$2.0050
1991-09-23$2.00$2.000
1991-09-20$2.00$2.005,050
1991-09-19$2.00$2.000
1991-09-18$2.00$2.00500
1991-09-17$2.25$2.250
1991-09-16$2.25$2.250
1991-09-13$2.25$2.250
1991-09-12$2.25$2.25350
1991-09-11$2.25$2.250
1991-09-10$2.25$2.250
1991-09-09$2.25$2.250
1991-09-06$2.25$2.25250
1991-09-05$2.25$2.251,300
1991-09-04$2.25$2.25250
1991-09-03$2.25$2.25200
1991-08-30$2.25$2.251,500
1991-08-29$2.00$2.00200
1991-08-28$2.00$2.00950
1991-08-27$2.00$2.001,100
1991-08-26$2.00$2.000
1991-08-23$2.00$2.00500
1991-08-22$2.00$2.00250
1991-08-21$2.00$2.000
1991-08-20$2.00$2.000
1991-08-19$2.00$2.000
1991-08-16$2.00$2.002,000
1991-08-15$2.00$2.0050
1991-08-14$2.00$2.000
1991-08-13$2.00$2.002,000
1991-08-12$2.25$2.253,500
1991-08-09$2.50$2.50150
1991-08-08$2.50$2.500
1991-08-07$2.50$2.500
1991-08-06$2.50$2.500
1991-08-05$2.50$2.50450
1991-08-02$2.50$2.500
1991-08-01$2.50$2.500
1991-07-31$2.50$2.501,000
1991-07-30$2.50$2.50550
1991-07-29$2.50$2.50200
1991-07-26$2.50$2.500
1991-07-25$2.50$2.500
1991-07-24$2.50$2.500
1991-07-23$2.50$2.50150
1991-07-22$2.50$2.500
1991-07-19$2.50$2.500
1991-07-18$2.50$2.5050
1991-07-17$2.50$2.500
1991-07-16$2.50$2.500
1991-07-15$2.50$2.50250
1991-07-12$2.50$2.500
1991-07-11$2.50$2.5050
1991-07-10$2.50$2.5050
1991-07-09$2.50$2.501,050
1991-07-08$2.50$2.506,000
1991-07-05$1.75$1.750
1991-07-03$1.75$1.752,500
1991-07-02$1.75$1.755,000
1991-07-01$1.75$1.750
1991-06-28$1.75$1.751,000
1991-06-27$1.75$1.75150
1991-06-26$1.75$1.751,000
1991-06-25$2.00$2.000
1991-06-24$2.00$2.000
1991-06-21$2.00$2.003,000
1991-06-20$2.00$2.009,400
1991-06-19$2.25$2.250
1991-06-18$2.25$2.250
1991-06-17$2.25$2.254,450
1991-06-14$2.75$2.750
1991-06-13$2.75$2.750
1991-06-12$2.75$2.750
1991-06-11$2.75$2.750
1991-06-10$2.75$2.7550
1991-06-07$2.75$2.750
1991-06-06$2.75$2.75200
1991-06-05$2.75$2.750
1991-06-04$2.75$2.750
1991-06-03$2.75$2.751,000
1991-05-31$2.75$2.75500
1991-05-30$2.75$2.750
1991-05-29$2.75$2.7550
1991-05-28$2.75$2.750
1991-05-24$2.75$2.75150
1991-05-23$2.75$2.752,750
1991-05-22$3.00$3.003,300
1991-05-21$3.00$3.000
1991-05-20$3.00$3.002,050
1991-05-17$3.00$3.006,500
1991-05-16$3.00$3.001,600
1991-05-15$3.25$3.254,850
1991-05-14$4.00$4.002,900
1991-05-13$4.25$4.250
1991-05-10$4.25$4.251,500
1991-05-09$4.25$4.25550
1991-05-08$4.00$4.003,250
1991-05-07$3.75$3.7512,150
1991-05-06$3.50$3.500
1991-05-03$3.50$3.502,500
1991-05-02$3.50$3.500
1991-05-01$3.50$3.500
1991-04-30$3.50$3.502,000
1991-04-29$3.50$3.502,900
1991-04-26$3.00$3.006,750
1991-04-25$2.50$2.500
1991-04-24$2.50$2.500
1991-04-23$2.50$2.50550
1991-04-22$2.50$2.501,000
1991-04-19$2.50$2.500
1991-04-18$2.50$2.50150
1991-04-17$2.50$2.507,150
1991-04-16$2.50$2.502,650
1991-04-15$2.25$2.2550
1991-04-12$2.25$2.251,500
1991-04-11$2.00$2.000
1991-04-10$2.00$2.003,750
1991-04-09$2.00$2.000
1991-04-08$2.00$2.000
1991-04-05$2.00$2.00900
1991-04-04$2.00$2.00850
1991-04-03$2.00$2.001,000
1991-04-02$2.25$2.252,000
1991-04-01$2.25$2.250
1991-03-28$2.25$2.250
1991-03-27$2.25$2.250
1991-03-26$2.25$2.254,000
1991-03-25$2.25$2.250
1991-03-22$2.25$2.25150
1991-03-21$2.25$2.250
1991-03-20$2.25$2.250
1991-03-19$2.25$2.250
1991-03-18$2.25$2.250
1991-03-15$2.25$2.250
1991-03-14$2.25$2.25150
1991-03-13$2.25$2.25500
1991-03-12$2.25$2.250
1991-03-11$2.25$2.255,200
1991-03-08$2.00$2.00500
1991-03-07$2.00$2.001,500
1991-03-06$2.00$2.000
1991-03-05$2.00$2.00350
1991-03-04$2.00$2.001,000
1991-03-01$2.00$2.00500
1991-02-28$2.00$2.005,000
1991-02-27$2.00$2.000
1991-02-26$2.00$2.000
1991-02-25$2.00$2.000
1991-02-22$2.00$2.00750
1991-02-21$2.00$2.001,500
1991-02-20$2.00$2.001,500
1991-02-19$1.75$1.750
1991-02-15$1.75$1.750
1991-02-14$1.75$1.752,000
1991-02-13$1.75$1.750
1991-02-12$1.75$1.75500
1991-02-11$1.75$1.751,000
1991-02-08$1.75$1.750
1991-02-07$1.75$1.750
1991-02-06$1.75$1.753,250
1991-02-05$1.75$1.750
1991-02-04$1.75$1.750
1991-02-01$1.75$1.750
1991-01-31$1.75$1.753,800
1991-01-30$1.75$1.752,600
1991-01-29$1.75$1.750
1991-01-28$1.75$1.750
1991-01-25$1.75$1.75100
1991-01-24$1.75$1.750
1991-01-23$1.75$1.750
1991-01-22$1.75$1.750
1991-01-21$1.75$1.750
1991-01-18$1.75$1.750
1991-01-17$1.75$1.750
1991-01-16$1.75$1.750
1991-01-15$1.75$1.7550
1991-01-14$1.75$1.754,300
1991-01-11$1.75$1.751,650
1991-01-10$1.75$1.752,000
1991-01-09$1.75$1.750
1991-01-08$1.75$1.754,500
1991-01-07$1.75$1.752,300
1991-01-04$1.75$1.752,000
1991-01-03$1.75$1.752,000
1991-01-02$1.75$1.75450