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 — 2025

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2025-12-31$12.55$12.55137,800
2025-12-30$12.64$12.64167,300
2025-12-29$11.97$11.97442,400
2025-12-26$12.76$12.76132,900
2025-12-24$12.48$12.48179,500
2025-12-23$12.83$12.83389,700
2025-12-22$12.76$12.76450,900
2025-12-19$12.20$12.20169,700
2025-12-18$11.98$11.98369,500
2025-12-17$12.19$12.19397,800
2025-12-16$11.88$11.88261,600
2025-12-15$11.54$11.54221,100
2025-12-12$10.98$10.98346,200
2025-12-11$10.99$10.99736,800
2025-12-10$9.34$9.34258,300
2025-12-09$8.82$8.82101,600
2025-12-08$8.74$8.7480,900
2025-12-05$8.91$8.9177,100
2025-12-04$8.61$8.6145,400
2025-12-03$8.76$8.7675,500
2025-12-02$8.65$8.65153,700
2025-12-01$7.87$7.8748,400
2025-11-28$7.85$7.8521,900
2025-11-26$7.74$7.7482,500
2025-11-25$7.53$7.53121,100
2025-11-24$7.36$7.3669,900
2025-11-21$7.15$7.15119,500
2025-11-20$7.06$7.0694,000
2025-11-19$7.22$7.22124,500
2025-11-18$7.14$7.1487,400
2025-11-17$7.10$7.10123,000
2025-11-14$7.28$7.28116,000
2025-11-13$7.33$7.3388,800
2025-11-12$7.59$7.5999,700
2025-11-11$7.75$7.75174,100
2025-11-10$7.53$7.53143,100
2025-11-07$7.46$7.46128,700
2025-11-06$7.05$7.05262,700
2025-11-05$7.14$7.14215,100
2025-11-04$7.20$7.20152,100
2025-11-03$7.81$7.81133,300
2025-10-31$7.93$7.9379,200
2025-10-30$7.93$7.93270,800
2025-10-29$8.10$8.10124,800
2025-10-28$7.90$7.90135,900
2025-10-27$8.14$8.14164,900
2025-10-24$7.81$7.81136,500
2025-10-23$7.86$7.86105,900
2025-10-22$7.41$7.41133,000
2025-10-21$7.64$7.64138,700
2025-10-20$7.94$7.94193,100
2025-10-17$7.49$7.49147,900
2025-10-16$7.80$7.80404,000
2025-10-15$8.38$8.38387,500
2025-10-14$8.22$8.22589,200
2025-10-13$9.29$9.29300,300
2025-10-10$8.85$8.85559,600
2025-10-09$10.00$10.00481,600
2025-10-08$9.77$9.77395,100
2025-10-07$10.22$10.22392,800
2025-10-06$10.44$10.44968,900
2025-10-03$9.17$9.17280,700
2025-10-02$8.90$8.90669,700
2025-10-01$9.68$9.68502,600
2025-09-30$9.26$9.26134,500
2025-09-29$9.24$9.24188,200
2025-09-26$9.44$9.44321,600
2025-09-25$8.97$8.97210,900
2025-09-24$9.04$9.04248,500
2025-09-23$9.65$9.65522,300
2025-09-22$8.93$8.93325,700
2025-09-19$9.04$9.04306,400
2025-09-18$9.50$9.50450,600
2025-09-17$8.74$8.74459,900
2025-09-16$9.30$9.30251,900
2025-09-15$9.28$9.28462,600
2025-09-12$9.24$9.24503,800
2025-09-11$8.80$8.80961,100
2025-09-10$8.07$8.07303,200
2025-09-09$7.94$7.94468,900
2025-09-08$7.93$7.931,955,100
2025-09-05$6.42$6.42232,600
2025-09-04$6.41$6.41136,100
2025-09-03$5.80$5.8037,600
2025-09-02$5.93$5.9383,900
2025-08-29$6.33$6.33146,200
2025-08-28$6.39$6.39176,500
2025-08-27$5.97$5.9759,400
2025-08-26$5.97$5.9793,700
2025-08-25$5.99$5.9946,900
2025-08-22$6.02$6.02190,200
2025-08-21$5.44$5.4464,300
2025-08-20$5.85$5.85101,600
2025-08-19$5.40$5.4094,500
2025-08-18$5.88$5.88200,500
2025-08-15$5.07$5.0759,500
2025-08-14$5.05$5.0557,100
2025-08-13$4.94$4.9460,800
2025-08-12$4.63$4.6317,600
2025-08-11$4.75$4.7544,300
2025-08-08$4.85$4.8539,200
2025-08-07$5.09$5.09105,100
2025-08-06$4.48$4.4820,200
2025-08-05$4.51$4.5136,000
2025-08-04$4.43$4.4322,700
2025-08-01$4.56$4.5690,100
2025-07-31$4.71$4.7121,500
2025-07-30$4.62$4.6211,400
2025-07-29$4.68$4.6818,700
2025-07-28$4.74$4.7419,000
2025-07-25$4.68$4.6826,900
2025-07-24$4.70$4.7020,800
2025-07-23$4.89$4.8957,400
2025-07-22$4.64$4.6446,900
2025-07-21$4.56$4.5617,400
2025-07-18$4.51$4.5151,900
2025-07-17$4.53$4.5364,000
2025-07-16$4.52$4.5211,900
2025-07-15$4.60$4.6029,100
2025-07-14$4.64$4.6429,100
2025-07-11$4.81$4.8117,100
2025-07-10$4.87$4.8741,700
2025-07-09$4.82$4.8238,000
2025-07-08$4.83$4.8361,100
2025-07-07$4.75$4.7598,000
2025-07-03$4.48$4.4810,100
2025-07-02$4.53$4.5327,800
2025-07-01$4.45$4.4535,000
2025-06-30$4.44$4.4420,600
2025-06-27$4.64$4.64110,900
2025-06-26$4.44$4.4452,500
2025-06-25$4.21$4.2126,700
2025-06-24$4.23$4.2335,300
2025-06-23$4.16$4.1624,700
2025-06-20$4.08$4.0855,400
2025-06-18$4.15$4.1518,200
2025-06-17$4.19$4.1919,700
2025-06-16$4.17$4.1725,300
2025-06-13$4.05$4.0544,300
2025-06-12$4.36$4.3655,100
2025-06-11$4.15$4.1529,600
2025-06-10$4.02$4.0213,200
2025-06-09$3.96$3.9624,600
2025-06-06$4.03$4.0329,700
2025-06-05$4.00$4.0017,600
2025-06-04$4.00$4.0018,700
2025-06-03$3.91$3.9116,700
2025-06-02$3.99$3.9932,600
2025-05-30$4.01$4.0123,800
2025-05-29$4.15$4.1590,300
2025-05-28$3.87$3.8751,800
2025-05-27$4.15$4.1570,500
2025-05-23$4.06$4.0652,000
2025-05-22$4.13$4.13118,500
2025-05-21$3.65$3.6531,900
2025-05-20$3.80$3.8026,500
2025-05-19$3.94$3.94112,700
2025-05-16$3.52$3.52108,700
2025-05-15$3.49$3.4964,700
2025-05-14$3.48$3.48235,800
2025-05-13$3.49$3.49156,900
2025-05-12$3.36$3.3697,800
2025-05-09$3.43$3.4383,700
2025-05-08$3.49$3.4992,300
2025-05-07$3.59$3.5911,700
2025-05-06$3.49$3.4965,400
2025-05-05$3.38$3.3844,600
2025-05-02$3.60$3.6089,400
2025-05-01$3.44$3.4415,500
2025-04-30$3.45$3.4560,800
2025-04-29$3.48$3.4852,600
2025-04-28$3.50$3.5022,200
2025-04-25$3.50$3.5038,700
2025-04-24$3.55$3.5536,500
2025-04-23$3.52$3.5223,200
2025-04-22$3.38$3.3855,100
2025-04-21$3.35$3.3594,200
2025-04-17$3.58$3.5829,500
2025-04-16$3.58$3.5846,600
2025-04-15$3.65$3.6532,200
2025-04-14$3.76$3.7627,700
2025-04-11$3.75$3.7579,900
2025-04-10$3.65$3.65267,200
2025-04-09$4.26$4.2669,500
2025-04-08$4.25$4.2590,000
2025-04-07$4.59$4.5978,100
2025-04-04$4.48$4.48146,900
2025-04-03$4.62$4.6245,400
2025-04-02$4.80$4.8039,100
2025-04-01$4.81$4.8132,900
2025-03-31$4.83$4.8344,300
2025-03-28$4.99$4.9975,400
2025-03-27$4.99$4.9944,500
2025-03-26$5.02$5.0221,900
2025-03-25$5.06$5.0638,900
2025-03-24$5.10$5.1063,000
2025-03-21$5.17$5.17113,000
2025-03-20$4.90$4.90404,800
2025-03-19$4.99$4.9964,400
2025-03-18$4.89$4.8959,100
2025-03-17$4.94$4.9449,300
2025-03-14$4.94$4.9445,900
2025-03-13$4.78$4.7823,900
2025-03-12$4.97$4.9758,500
2025-03-11$4.92$4.9234,900
2025-03-10$4.77$4.7785,600
2025-03-07$5.07$5.0732,900
2025-03-06$5.07$5.0786,500
2025-03-05$4.95$4.9534,200
2025-03-04$4.90$4.9035,400
2025-03-03$4.96$4.9668,100
2025-02-28$4.94$4.9452,600
2025-02-27$5.05$5.0533,600
2025-02-26$5.20$5.2048,600
2025-02-25$5.05$5.0594,900
2025-02-24$5.25$5.25122,200
2025-02-21$5.23$5.2381,200
2025-02-20$5.69$5.6996,700
2025-02-19$5.69$5.6958,300
2025-02-18$5.62$5.62126,600
2025-02-14$5.84$5.84208,100
2025-02-13$4.90$4.9039,100
2025-02-12$4.84$4.8416,700
2025-02-11$5.02$5.0226,600
2025-02-10$5.04$5.0431,100
2025-02-07$5.15$5.15127,500
2025-02-06$5.00$5.0057,600
2025-02-05$5.23$5.2315,200
2025-02-04$5.25$5.2524,800
2025-02-03$5.00$5.0018,900
2025-01-31$5.05$5.0523,300
2025-01-30$5.02$5.0214,800
2025-01-29$5.10$5.1033,300
2025-01-28$5.10$5.1062,600
2025-01-27$5.10$5.1079,100
2025-01-24$5.30$5.3017,100
2025-01-23$5.34$5.3423,900
2025-01-22$5.34$5.3417,300
2025-01-21$5.21$5.2135,100
2025-01-17$5.25$5.2535,700
2025-01-16$5.28$5.2835,000
2025-01-15$5.26$5.2629,100
2025-01-14$5.31$5.315,600
2025-01-13$5.43$5.4328,900
2025-01-10$5.37$5.3736,600
2025-01-08$5.45$5.4519,000
2025-01-07$5.64$5.6429,300
2025-01-06$5.68$5.6830,400
2025-01-03$5.63$5.6353,400
2025-01-02$5.60$5.6037,900