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 — 1985

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
1985-12-31$10.00$10.001,650
1985-12-30$10.00$10.00940
1985-12-27$10.00$10.00363
1985-12-26$10.00$10.001,483
1985-12-24$10.00$10.00395
1985-12-23$10.00$10.00733
1985-12-20$10.00$10.00230
1985-12-19$10.00$10.00488
1985-12-18$10.00$10.00775
1985-12-17$10.00$10.001,260
1985-12-16$10.00$10.002,050
1985-12-13$10.00$10.001,150
1985-12-12$10.00$10.00470
1985-12-11$5.00$5.001,875
1985-12-10$5.00$5.00173
1985-12-09$5.00$5.00163
1985-12-06$5.00$5.00615
1985-12-05$5.00$5.00413
1985-12-04$10.00$10.00100
1985-12-03$10.00$10.00275
1985-12-02$10.00$10.0020
1985-11-29$5.00$5.00163
1985-11-27$10.00$10.00550
1985-11-26$5.00$5.00458
1985-11-25$5.00$5.001,593
1985-11-22$10.00$10.00858
1985-11-21$10.00$10.001,768
1985-11-20$10.00$10.00975
1985-11-19$10.00$10.001,570
1985-11-18$10.00$10.00995
1985-11-15$10.00$10.002,235
1985-11-14$10.00$10.001,825
1985-11-13$10.00$10.00483
1985-11-12$10.00$10.00350
1985-11-11$10.00$10.00620
1985-11-08$10.00$10.00460
1985-11-07$10.00$10.002,900
1985-11-06$5.00$5.00995
1985-11-05$5.00$5.00800
1985-11-04$5.00$5.001,488
1985-11-01$5.00$5.000
1985-10-31$5.00$5.00305
1985-10-30$5.00$5.002,000
1985-10-29$5.00$5.002,625
1985-10-28$5.00$5.00508
1985-10-25$5.00$5.002,500
1985-10-24$5.00$5.00138
1985-10-23$5.00$5.001,275
1985-10-22$5.00$5.00310
1985-10-21$5.00$5.00513
1985-10-18$5.00$5.00550
1985-10-17$5.00$5.0010
1985-10-16$5.00$5.00145
1985-10-15$5.00$5.00130
1985-10-14$5.00$5.00300
1985-10-11$5.00$5.002,110
1985-10-10$5.00$5.002,575
1985-10-09$5.00$5.004,113
1985-10-08$5.00$5.00763
1985-10-07$5.00$5.00398
1985-10-04$5.00$5.001,625
1985-10-03$5.00$5.00675
1985-10-02$5.00$5.001,455
1985-10-01$5.00$5.00888
1985-09-30$5.00$5.00433
1985-09-26$5.00$5.001,025
1985-09-25$5.00$5.001,923
1985-09-24$5.00$5.001,780
1985-09-23$5.00$5.00713
1985-09-20$5.00$5.004,725
1985-09-19$5.00$5.001,493
1985-09-18$5.00$5.001,455
1985-09-17$5.00$5.001,350
1985-09-16$5.00$5.00138
1985-09-13$5.00$5.001,575
1985-09-12$5.00$5.001,750
1985-09-11$5.00$5.00910
1985-09-10$5.00$5.001,520
1985-09-09$5.00$5.00413
1985-09-06$5.00$5.00625
1985-09-05$5.00$5.002,115
1985-09-04$5.00$5.00725
1985-09-03$5.00$5.00125
1985-08-30$5.00$5.0038
1985-08-29$5.00$5.00338
1985-08-28$5.00$5.00350
1985-08-27$5.00$5.001,783
1985-08-26$5.00$5.001,115
1985-08-23$5.00$5.00305
1985-08-22$5.00$5.00975
1985-08-21$5.00$5.001,308
1985-08-20$10.00$10.00243
1985-08-19$10.00$10.001,530
1985-08-16$10.00$10.002,508
1985-08-15$10.00$10.001,178
1985-08-14$10.00$10.001,125
1985-08-13$10.00$10.00568
1985-08-12$10.00$10.00900
1985-08-09$10.00$10.00288
1985-08-08$10.00$10.00690
1985-08-07$10.00$10.00263
1985-08-06$10.00$10.00813
1985-08-05$10.00$10.00880
1985-08-02$10.00$10.00280
1985-08-01$10.00$10.002,975
1985-07-31$10.00$10.00700
1985-07-30$10.00$10.00680
1985-07-29$10.00$10.001,950
1985-07-26$10.00$10.001,445
1985-07-25$10.00$10.001,508
1985-07-24$10.00$10.00405
1985-07-23$10.00$10.000
1985-07-22$10.00$10.001,250
1985-07-19$10.00$10.001,220
1985-07-18$10.00$10.00300
1985-07-17$10.00$10.00375
1985-07-16$10.00$10.00928
1985-07-15$10.00$10.00385
1985-07-12$10.00$10.002,313
1985-07-11$10.00$10.004,165
1985-07-10$10.00$10.00263
1985-07-09$10.00$10.00625
1985-07-08$10.00$10.00613
1985-07-05$10.00$10.001,300
1985-07-03$10.00$10.00813
1985-07-02$10.00$10.001,000
1985-07-01$10.00$10.00100
1985-06-28$10.00$10.00920
1985-06-27$10.00$10.00160
1985-06-26$10.00$10.00968
1985-06-25$10.00$10.001,185
1985-06-24$10.00$10.00725
1985-06-21$10.00$10.003,615
1985-06-20$10.00$10.002,148
1985-06-19$10.00$10.00435
1985-06-18$10.00$10.001,603
1985-06-17$10.00$10.00683
1985-06-14$10.00$10.002,638
1985-06-13$10.00$10.003,578
1985-06-12$10.00$10.00805
1985-06-11$10.00$10.003,983
1985-06-10$10.00$10.005,023
1985-06-07$15.00$15.005,065
1985-06-06$15.00$15.002,698
1985-06-05$15.00$15.004,678
1985-06-04$10.00$10.004,720
1985-06-03$10.00$10.009,278
1985-05-31$10.00$10.005,595
1985-05-30$10.00$10.001,685
1985-05-29$10.00$10.00145
1985-05-28$10.00$10.00613
1985-05-24$10.00$10.0050
1985-05-23$10.00$10.001,355
1985-05-22$10.00$10.00875
1985-05-21$10.00$10.001,158
1985-05-20$10.00$10.00925
1985-05-17$10.00$10.00200
1985-05-16$10.00$10.00400
1985-05-15$10.00$10.001,630
1985-05-14$10.00$10.001,753
1985-05-13$10.00$10.001,163
1985-05-10$10.00$10.002,900
1985-05-09$10.00$10.00725
1985-05-08$10.00$10.00158
1985-05-07$10.00$10.002,550
1985-05-06$10.00$10.003,605
1985-05-03$10.00$10.00325
1985-05-02$10.00$10.00825
1985-05-01$10.00$10.00105
1985-04-30$10.00$10.001,198
1985-04-29$10.00$10.0013
1985-04-26$10.00$10.0075
1985-04-25$10.00$10.0058
1985-04-24$10.00$10.001,138
1985-04-23$10.00$10.00855
1985-04-22$10.00$10.00648
1985-04-19$10.00$10.00363
1985-04-18$10.00$10.001,063
1985-04-17$10.00$10.002,550
1985-04-16$10.00$10.00653
1985-04-15$10.00$10.00463
1985-04-12$10.00$10.00778
1985-04-11$10.00$10.001,863
1985-04-10$10.00$10.00863
1985-04-09$10.00$10.001,320
1985-04-08$10.00$10.000
1985-04-04$10.00$10.00863
1985-04-03$10.00$10.001,075
1985-04-02$10.00$10.00470
1985-04-01$10.00$10.00128
1985-03-29$10.00$10.00683
1985-03-28$10.00$10.003,058
1985-03-27$10.00$10.00833
1985-03-26$10.00$10.001,185
1985-03-25$10.00$10.003,438
1985-03-22$10.00$10.00183
1985-03-21$10.00$10.001,088
1985-03-20$10.00$10.001,390
1985-03-19$10.00$10.002,780
1985-03-18$10.00$10.001,283
1985-03-15$10.00$10.002,845
1985-03-14$10.00$10.003,758
1985-03-13$10.00$10.00473
1985-03-12$10.00$10.00813
1985-03-11$10.00$10.00825
1985-03-08$10.00$10.001,403
1985-03-07$10.00$10.002,938
1985-03-06$10.00$10.00200
1985-03-05$10.00$10.003,063
1985-03-04$10.00$10.00555
1985-03-01$10.00$10.0040
1985-02-28$10.00$10.002,085
1985-02-27$10.00$10.001,315
1985-02-26$10.00$10.001,175
1985-02-25$10.00$10.003,003
1985-02-22$10.00$10.001,338
1985-02-21$10.00$10.00618
1985-02-20$10.00$10.00978
1985-02-19$10.00$10.00625
1985-02-15$10.00$10.00825
1985-02-14$10.00$10.004,650
1985-02-13$10.00$10.001,148
1985-02-12$10.00$10.001,805
1985-02-11$10.00$10.004,333
1985-02-08$10.00$10.004,518
1985-02-07$5.00$5.001,813
1985-02-06$5.00$5.001,118
1985-02-05$5.00$5.004,750
1985-02-04$5.00$5.001,613
1985-02-01$10.00$10.001,595
1985-01-31$10.00$10.00558
1985-01-30$5.00$5.001,945
1985-01-29$5.00$5.00573
1985-01-28$5.00$5.001,200
1985-01-25$5.00$5.001,380
1985-01-24$5.00$5.0025
1985-01-23$5.00$5.00563
1985-01-22$5.00$5.0025
1985-01-21$5.00$5.00583
1985-01-18$5.00$5.00785
1985-01-17$5.00$5.00930
1985-01-16$5.00$5.002,563
1985-01-15$5.00$5.003,428
1985-01-14$5.00$5.00788
1985-01-11$5.00$5.00600
1985-01-10$5.00$5.00500
1985-01-09$5.00$5.001,938
1985-01-08$5.00$5.001,735
1985-01-07$10.00$10.001,635
1985-01-04$10.00$10.00200
1985-01-03$10.00$10.000
1985-01-02$10.00$10.00595