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 — 2020

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2020-12-31$6.38$6.3834,200——
2020-12-30$6.50$6.5090,100——
2020-12-29$6.06$6.0633,300——
2020-12-28$5.99$5.9940,000——
2020-12-24$6.13$6.1310,800——
2020-12-23$6.13$6.1340,700——
2020-12-22$6.12$6.1283,600——
2020-12-21$6.24$6.2481,300——
2020-12-18$6.28$6.28112,600——
2020-12-17$6.29$6.2939,300——
2020-12-16$6.20$6.2020,200——
2020-12-15$6.38$6.3816,900——
2020-12-14$6.36$6.369,900——
2020-12-11$6.25$6.2531,100——
2020-12-10$6.37$6.3721,700——
2020-12-09$6.45$6.4524,800——
2020-12-08$6.66$6.6649,900——
2020-12-07$6.68$6.6861,800——
2020-12-04$7.13$7.13118,700——
2020-12-03$6.96$6.96128,500——
2020-12-02$6.80$6.80121,000——
2020-12-01$6.53$6.53206,400——
2020-11-30$6.17$6.1765,500——
2020-11-27$5.91$5.918,900——
2020-11-25$5.86$5.8625,500——
2020-11-24$5.65$5.6520,600——
2020-11-23$5.52$5.5295,100——
2020-11-20$5.83$5.8374,000——
2020-11-19$6.16$6.1656,200——
2020-11-18$6.06$6.0617,900——
2020-11-17$5.98$5.9811,700——
2020-11-16$5.67$5.6723,800——
2020-11-13$5.83$5.8329,600——
2020-11-12$5.43$5.4313,500——
2020-11-11$5.26$5.266,100——
2020-11-10$5.16$5.1610,000——
2020-11-09$5.33$5.3310,900——
2020-11-06$5.46$5.469,700——
2020-11-05$5.32$5.3216,800——
2020-11-04$5.19$5.1916,400——
2020-11-03$5.12$5.1212,500——
2020-11-02$5.32$5.3214,800——
2020-10-30$5.32$5.3215,200——
2020-10-29$5.36$5.3621,400——
2020-10-28$5.05$5.05142,300——
2020-10-27$5.40$5.4028,200——
2020-10-26$5.73$5.7311,500——
2020-10-23$5.87$5.8716,800——
2020-10-22$6.07$6.0711,500——
2020-10-21$6.28$6.282,900——
2020-10-20$6.35$6.3539,600——
2020-10-19$6.35$6.3516,300——
2020-10-16$6.36$6.3640,900——
2020-10-15$6.33$6.3334,300——
2020-10-14$6.20$6.2010,500——
2020-10-13$6.15$6.1517,900——
2020-10-12$6.06$6.0662,400——
2020-10-09$5.86$5.8677,300——
2020-10-08$5.70$5.7031,700——
2020-10-07$5.65$5.6536,000——
2020-10-06$5.42$5.4234,700——
2020-10-05$5.45$5.4526,300——
2020-10-02$5.35$5.3538,800——
2020-10-01$5.10$5.1062,000——
2020-09-30$4.89$4.8940,000——
2020-09-29$5.01$5.0117,400——
2020-09-28$5.03$5.0338,700——
2020-09-25$5.17$5.1773,200——
2020-09-24$5.08$5.0868,300——
2020-09-23$5.02$5.0223,900——
2020-09-22$5.24$5.249,200——
2020-09-21$5.24$5.2432,900——
2020-09-18$5.27$5.2723,100——
2020-09-17$5.45$5.4513,100——
2020-09-16$5.39$5.3916,300——
2020-09-15$5.36$5.3620,100——
2020-09-14$5.40$5.4016,500——
2020-09-11$5.31$5.3117,800——
2020-09-10$5.20$5.2042,300——
2020-09-09$5.21$5.2125,400——
2020-09-08$5.56$5.5660,300——
2020-09-04$5.63$5.6365,300——
2020-09-03$5.69$5.6950,500——
2020-09-02$5.75$5.7544,600——
2020-09-01$5.84$5.84122,000——
2020-08-31$5.68$5.6866,100——
2020-08-28$5.57$5.5766,800——
2020-08-27$5.33$5.3392,500——
2020-08-26$5.16$5.16276,600——
2020-08-25$5.16$5.1625,600——
2020-08-24$5.18$5.1867,600——
2020-08-21$5.17$5.1725,900——
2020-08-20$5.18$5.1849,300——
2020-08-19$5.17$5.1723,700——
2020-08-18$5.06$5.0636,700——
2020-08-17$5.08$5.0819,800——
2020-08-14$5.06$5.0694,100——
2020-08-13$4.95$4.95135,700——
2020-08-12$4.97$4.9725,200——
2020-08-11$5.00$5.0013,700——
2020-08-10$5.03$5.03169,500——
2020-08-07$4.93$4.9321,800——
2020-08-06$5.11$5.1181,600——
2020-08-05$5.26$5.2638,400——
2020-08-04$5.24$5.2431,900——
2020-08-03$5.16$5.1634,300——
2020-07-31$5.15$5.1541,000——
2020-07-30$5.17$5.1778,000——
2020-07-29$5.15$5.1520,400——
2020-07-28$5.05$5.0563,500——
2020-07-27$4.98$4.9822,900——
2020-07-24$4.98$4.9817,900——
2020-07-23$5.06$5.0622,900——
2020-07-22$5.13$5.1315,900——
2020-07-21$5.06$5.0663,000——
2020-07-20$4.98$4.9828,700——
2020-07-17$4.99$4.9959,100——
2020-07-16$5.05$5.0524,500——
2020-07-15$5.00$5.0083,700——
2020-07-14$4.98$4.9816,700——
2020-07-13$4.92$4.9228,100——
2020-07-10$4.92$4.9216,700——
2020-07-09$4.92$4.9224,000——
2020-07-08$4.91$4.9149,200——
2020-07-07$4.80$4.8022,200——
2020-07-06$4.79$4.79194,200——
2020-07-02$4.77$4.7777,200——
2020-07-01$4.96$4.9645,200——
2020-06-30$4.87$4.8716,200——
2020-06-29$4.87$4.8730,600——
2020-06-26$4.85$4.8519,700——
2020-06-25$4.85$4.8526,000——
2020-06-24$4.89$4.8920,800——
2020-06-23$4.95$4.9536,500——
2020-06-22$4.95$4.9581,000——
2020-06-19$5.08$5.0834,600——
2020-06-18$5.06$5.06101,100——
2020-06-17$5.00$5.0058,700——
2020-06-16$4.96$4.9631,800——
2020-06-15$5.13$5.1353,400——
2020-06-12$4.96$4.9620,600——
2020-06-11$4.99$4.9947,700——
2020-06-10$5.34$5.3436,600——
2020-06-09$5.25$5.2526,200——
2020-06-08$5.42$5.4227,100——
2020-06-05$5.38$5.3844,100——
2020-06-04$5.29$5.2922,000——
2020-06-03$5.38$5.3844,900——
2020-06-02$5.33$5.3326,500——
2020-06-01$5.23$5.2311,800——
2020-05-29$5.24$5.2429,100——
2020-05-28$5.17$5.1718,900——
2020-05-27$5.10$5.1022,300——
2020-05-26$5.13$5.1323,100——
2020-05-22$4.99$4.9939,800——
2020-05-21$5.20$5.2023,000——
2020-05-20$5.28$5.2839,700——
2020-05-19$5.11$5.1141,300——
2020-05-18$4.97$4.9737,400——
2020-05-15$4.92$4.9214,100——
2020-05-14$4.91$4.9128,700——
2020-05-13$4.92$4.9241,200——
2020-05-12$5.28$5.2844,900——
2020-05-11$5.49$5.4959,700——
2020-05-08$5.27$5.2757,700——
2020-05-07$5.03$5.0341,600——
2020-05-06$5.02$5.0211,600——
2020-05-05$5.04$5.0441,800——
2020-05-04$5.01$5.0124,600——
2020-05-01$5.10$5.1044,700——
2020-04-30$4.96$4.9637,200——
2020-04-29$4.95$4.9537,400——
2020-04-28$4.94$4.9453,600——
2020-04-27$5.12$5.1243,600——
2020-04-24$4.59$4.5945,200——
2020-04-23$4.54$4.5439,100——
2020-04-22$4.44$4.4430,400——
2020-04-21$4.25$4.2549,400——
2020-04-20$4.37$4.3722,500——
2020-04-17$4.35$4.35131,600——
2020-04-16$4.70$4.7015,000——
2020-04-15$4.64$4.6427,500——
2020-04-14$4.82$4.8246,100——
2020-04-13$4.70$4.7034,300——
2020-04-09$4.60$4.6061,400——
2020-04-08$4.74$4.7436,900——
2020-04-07$4.63$4.6334,800——
2020-04-06$4.64$4.6432,300——
2020-04-03$4.48$4.4839,700——
2020-04-02$4.43$4.4328,200——
2020-04-01$4.27$4.2718,300——
2020-03-31$4.35$4.3520,100——
2020-03-30$4.18$4.1851,700——
2020-03-27$4.25$4.2531,900——
2020-03-26$4.48$4.4860,500——
2020-03-25$4.38$4.3842,200——
2020-03-24$4.40$4.4074,600——
2020-03-23$4.03$4.0354,200——
2020-03-20$4.04$4.0472,600——
2020-03-19$3.84$3.8470,300——
2020-03-18$3.91$3.9134,900——
2020-03-17$4.05$4.05126,300——
2020-03-16$3.60$3.6080,600——
2020-03-13$4.05$4.0581,900——
2020-03-12$3.87$3.87140,300——
2020-03-11$4.33$4.3369,800——
2020-03-10$4.41$4.4120,400——
2020-03-09$4.42$4.4251,500——
2020-03-06$4.68$4.6898,700——
2020-03-05$4.78$4.7882,800——
2020-03-04$4.97$4.9776,700——
2020-03-03$4.90$4.9088,900——
2020-03-02$4.96$4.9699,400——
2020-02-28$4.98$4.98116,100——
2020-02-27$4.97$4.97118,700——
2020-02-26$5.07$5.0777,400——
2020-02-25$5.07$5.07101,900——
2020-02-24$5.43$5.4388,100——
2020-02-21$5.67$5.6779,700——
2020-02-20$5.86$5.8650,800——
2020-02-19$5.70$5.70108,000——
2020-02-18$5.79$5.79112,100——
2020-02-14$5.70$5.7092,400——
2020-02-13$5.41$5.41133,200——
2020-02-12$5.30$5.3094,200——
2020-02-11$5.30$5.30119,200——
2020-02-10$5.19$5.19206,700——
2020-02-07$5.59$5.5981,300——
2020-02-06$5.53$5.5394,500——
2020-02-05$5.62$5.6292,800——
2020-02-04$5.47$5.4778,700——
2020-02-03$5.19$5.1991,100——
2020-01-31$5.13$5.13179,100——
2020-01-30$5.34$5.34239,400——
2020-01-29$6.31$6.31256,800——
2020-01-28$7.88$7.88284,100——
2020-01-27$7.74$7.7450,800——
2020-01-24$7.77$7.7783,500——
2020-01-23$7.80$7.8083,400——
2020-01-22$7.62$7.6254,200——
2020-01-21$7.70$7.7053,600——
2020-01-17$7.54$7.5437,600——
2020-01-16$7.52$7.5244,400——
2020-01-15$7.45$7.4549,600——
2020-01-14$7.46$7.4637,000——
2020-01-13$7.47$7.4764,600——
2020-01-10$7.32$7.3238,200——
2020-01-09$7.23$7.2338,800——
2020-01-08$7.17$7.1722,100——
2020-01-07$7.17$7.1726,100——
2020-01-06$7.10$7.1044,200——
2020-01-03$7.21$7.2140,300——
2020-01-02$7.26$7.2647,600——