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 — 2016

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2016-12-30$4.25$4.2536,400——
2016-12-29$4.02$4.0227,400——
2016-12-28$4.18$4.1810,000——
2016-12-27$4.26$4.2640,300——
2016-12-23$4.28$4.2811,100——
2016-12-22$4.37$4.3720,500——
2016-12-21$4.38$4.3814,500——
2016-12-20$4.20$4.2027,000——
2016-12-19$4.31$4.3143,400——
2016-12-16$4.20$4.2028,000——
2016-12-15$4.42$4.4256,100——
2016-12-14$4.08$4.0818,900——
2016-12-13$4.29$4.2936,800——
2016-12-12$4.10$4.1037,400——
2016-12-09$4.08$4.08118,100——
2016-12-08$4.02$4.0246,500——
2016-12-07$4.29$4.2943,100——
2016-12-06$4.36$4.3627,700——
2016-12-05$4.26$4.265,900——
2016-12-02$4.25$4.2516,600——
2016-12-01$4.26$4.2628,500——
2016-11-30$4.34$4.349,600——
2016-11-29$4.28$4.2823,500——
2016-11-28$4.29$4.2930,900——
2016-11-25$4.43$4.4316,000——
2016-11-23$4.68$4.6815,500——
2016-11-22$4.91$4.9162,100——
2016-11-21$4.83$4.8397,300——
2016-11-18$5.06$5.0650,100——
2016-11-17$5.35$5.3523,200——
2016-11-16$5.48$5.4830,800——
2016-11-15$5.31$5.3112,600——
2016-11-14$5.07$5.0731,600——
2016-11-11$5.40$5.4036,100——
2016-11-10$5.00$5.0031,000——
2016-11-09$4.71$4.7123,500——
2016-11-08$4.57$4.5724,000——
2016-11-07$4.46$4.4666,100——
2016-11-04$4.43$4.4316,400——
2016-11-03$4.43$4.4343,800——
2016-11-02$4.44$4.4414,800——
2016-11-01$4.57$4.5710,100——
2016-10-31$4.51$4.513,100——
2016-10-28$4.51$4.5124,500——
2016-10-27$4.47$4.477,100——
2016-10-26$4.44$4.449,400——
2016-10-25$4.41$4.418,300——
2016-10-24$4.53$4.5312,000——
2016-10-21$4.56$4.5618,500——
2016-10-20$4.43$4.435,600——
2016-10-19$4.54$4.5413,300——
2016-10-18$4.57$4.5714,100——
2016-10-17$4.51$4.5117,300——
2016-10-14$4.60$4.609,300——
2016-10-13$4.55$4.556,800——
2016-10-12$4.58$4.587,300——
2016-10-11$4.65$4.6516,300——
2016-10-10$4.71$4.7130,200——
2016-10-07$4.74$4.749,300——
2016-10-06$4.79$4.7920,600——
2016-10-05$4.82$4.8214,100——
2016-10-04$4.78$4.7823,700——
2016-10-03$4.87$4.877,000——
2016-09-30$4.96$4.969,100——
2016-09-29$4.93$4.933,700——
2016-09-28$4.96$4.966,400——
2016-09-27$4.87$4.8731,200——
2016-09-26$4.85$4.857,000——
2016-09-23$4.87$4.8719,400——
2016-09-22$4.89$4.8912,000——
2016-09-21$4.88$4.8824,400——
2016-09-20$5.03$5.0325,900——
2016-09-19$5.06$5.0616,700——
2016-09-16$5.12$5.1216,600——
2016-09-15$5.07$5.0711,100——
2016-09-14$5.00$5.0011,500——
2016-09-13$4.91$4.9122,700——
2016-09-12$5.02$5.0235,300——
2016-09-09$5.11$5.1113,500——
2016-09-08$5.23$5.2311,400——
2016-09-07$5.19$5.1956,000——
2016-09-06$5.40$5.408,700——
2016-09-02$5.39$5.3922,000——
2016-09-01$5.32$5.3217,700——
2016-08-31$5.36$5.369,300——
2016-08-30$5.36$5.3611,900——
2016-08-29$5.35$5.356,600——
2016-08-26$5.39$5.3917,200——
2016-08-25$5.29$5.2920,300——
2016-08-24$5.46$5.4616,200——
2016-08-23$5.64$5.6426,600——
2016-08-22$5.68$5.687,600——
2016-08-19$5.70$5.709,800——
2016-08-18$5.67$5.673,800——
2016-08-17$5.60$5.608,000——
2016-08-16$5.66$5.6616,600——
2016-08-15$5.50$5.5020,200——
2016-08-12$5.40$5.4018,500——
2016-08-11$5.53$5.5323,100——
2016-08-10$5.75$5.7521,900——
2016-08-09$5.75$5.7519,700——
2016-08-08$6.05$6.0521,500——
2016-08-05$6.15$6.1524,100——
2016-08-04$6.08$6.0816,300——
2016-08-03$6.16$6.1610,100——
2016-08-02$6.10$6.104,300——
2016-08-01$6.18$6.186,100——
2016-07-29$6.09$6.097,200——
2016-07-28$6.11$6.1110,500——
2016-07-27$6.15$6.156,500——
2016-07-26$6.13$6.1324,400——
2016-07-25$5.99$5.9924,300——
2016-07-22$5.87$5.875,100——
2016-07-21$5.98$5.987,500——
2016-07-20$5.99$5.995,300——
2016-07-19$5.88$5.883,600——
2016-07-18$5.76$5.7613,100——
2016-07-15$5.69$5.6916,600——
2016-07-14$5.76$5.7611,300——
2016-07-13$5.73$5.7314,200——
2016-07-12$5.92$5.925,200——
2016-07-11$5.78$5.7811,600——
2016-07-08$5.61$5.619,900——
2016-07-07$5.46$5.4617,400——
2016-07-06$5.49$5.4918,100——
2016-07-05$5.58$5.5820,800——
2016-07-01$5.84$5.8427,000——
2016-06-30$5.97$5.9717,000——
2016-06-29$5.99$5.9912,000——
2016-06-28$5.96$5.9616,000——
2016-06-27$5.90$5.9023,000——
2016-06-24$6.17$6.1750,600——
2016-06-23$6.70$6.7047,400——
2016-06-22$6.55$6.5516,900——
2016-06-21$6.88$6.887,500——
2016-06-20$6.94$6.9465,700——
2016-06-17$6.92$6.9218,700——
2016-06-16$6.82$6.8219,900——
2016-06-15$6.77$6.777,800——
2016-06-14$6.65$6.652,600——
2016-06-13$6.54$6.544,600——
2016-06-10$6.62$6.627,400——
2016-06-09$6.59$6.594,800——
2016-06-08$6.76$6.7616,900——
2016-06-07$6.59$6.5910,700——
2016-06-06$6.91$6.9127,000——
2016-06-03$6.79$6.7919,500——
2016-06-02$6.96$6.9610,700——
2016-06-01$7.00$7.0014,100——
2016-05-31$7.00$7.0024,500——
2016-05-27$6.72$6.7214,900——
2016-05-26$6.71$6.718,700——
2016-05-25$6.58$6.587,800——
2016-05-24$6.61$6.6123,800——
2016-05-23$6.27$6.2779,400——
2016-05-20$5.81$5.8132,500——
2016-05-19$5.68$5.6822,000——
2016-05-18$5.66$5.6619,100——
2016-05-17$5.73$5.7330,800——
2016-05-16$5.80$5.8027,300——
2016-05-13$5.69$5.699,900——
2016-05-12$5.67$5.6713,900——
2016-05-11$5.75$5.7519,200——
2016-05-10$5.97$5.9730,300——
2016-05-09$6.02$6.0260,700——
2016-05-06$5.77$5.7715,500——
2016-05-05$5.80$5.8038,800——
2016-05-04$6.09$6.0959,700——
2016-05-03$5.65$5.6535,300——
2016-05-02$6.06$6.0627,000——
2016-04-29$6.25$6.2514,900——
2016-04-28$6.34$6.347,800——
2016-04-27$6.36$6.369,300——
2016-04-26$6.42$6.4213,100——
2016-04-25$6.42$6.422,400——
2016-04-22$6.57$6.575,800——
2016-04-21$6.43$6.436,700——
2016-04-20$6.37$6.3710,000——
2016-04-19$6.33$6.3314,500——
2016-04-18$6.47$6.4717,700——
2016-04-15$6.47$6.4747,400——
2016-04-14$6.68$6.6817,500——
2016-04-13$6.79$6.7913,000——
2016-04-12$6.98$6.9827,500——
2016-04-11$6.33$6.3311,800——
2016-04-08$6.50$6.503,600——
2016-04-07$6.39$6.3914,600——
2016-04-06$6.19$6.199,200——
2016-04-05$6.06$6.066,600——
2016-04-04$6.03$6.0314,700——
2016-04-01$6.11$6.1164,200——
2016-03-31$6.49$6.496,400——
2016-03-30$6.77$6.778,000——
2016-03-29$6.78$6.7833,000——
2016-03-28$6.47$6.4724,100——
2016-03-24$6.52$6.528,800——
2016-03-23$6.63$6.6341,300——
2016-03-22$7.21$7.2128,000——
2016-03-21$7.59$7.5969,400——
2016-03-18$6.97$6.9739,800——
2016-03-17$6.65$6.6548,400——
2016-03-16$5.96$5.963,100——
2016-03-15$6.08$6.0842,100——
2016-03-14$6.04$6.047,300——
2016-03-11$6.05$6.0516,700——
2016-03-10$6.04$6.0428,400——
2016-03-09$6.02$6.027,600——
2016-03-08$5.90$5.9024,900——
2016-03-07$5.70$5.708,400——
2016-03-04$5.55$5.5516,500——
2016-03-03$5.27$5.2720,400——
2016-03-02$5.57$5.574,500——
2016-03-01$5.49$5.4927,700——
2016-02-29$5.10$5.1017,200——
2016-02-26$5.10$5.1020,400——
2016-02-25$5.41$5.419,700——
2016-02-24$5.08$5.0837,600——
2016-02-23$4.99$4.9914,700——
2016-02-22$4.99$4.9929,800——
2016-02-19$5.10$5.1017,200——
2016-02-18$5.29$5.297,500——
2016-02-17$5.29$5.297,200——
2016-02-16$4.95$4.956,000——
2016-02-12$4.80$4.8011,400——
2016-02-11$4.82$4.8212,600——
2016-02-10$4.69$4.6936,800——
2016-02-09$5.04$5.0422,700——
2016-02-08$5.06$5.0627,700——
2016-02-05$5.18$5.1899,200——
2016-02-04$5.50$5.5026,700——
2016-02-03$5.44$5.449,200——
2016-02-02$5.33$5.3317,700——
2016-02-01$5.54$5.544,100——
2016-01-29$5.67$5.679,600——
2016-01-28$5.47$5.476,900——
2016-01-27$5.48$5.484,900——
2016-01-26$5.41$5.416,800——
2016-01-25$5.25$5.257,600——
2016-01-22$5.19$5.1913,000——
2016-01-21$4.85$4.8518,900——
2016-01-20$4.63$4.6362,100——
2016-01-19$4.74$4.7464,700——
2016-01-15$5.26$5.2670,500——
2016-01-14$5.40$5.4060,400——
2016-01-13$5.32$5.3267,300——
2016-01-12$5.56$5.5631,700——
2016-01-11$5.69$5.6938,900——
2016-01-08$5.75$5.7515,800——
2016-01-07$5.66$5.6656,400——
2016-01-06$5.87$5.8713,000——
2016-01-05$5.94$5.9444,100——
2016-01-04$6.20$6.2034,200——