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 — 2021

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2021-12-31$9.88$9.8844,000
2021-12-30$9.78$9.7854,500
2021-12-29$9.63$9.6343,100
2021-12-28$9.77$9.7747,400
2021-12-27$9.89$9.8952,700
2021-12-23$9.49$9.4996,200
2021-12-22$9.49$9.4947,100
2021-12-21$9.34$9.3486,600
2021-12-20$9.00$9.0062,000
2021-12-17$9.27$9.2752,400
2021-12-16$9.10$9.1070,500
2021-12-15$9.40$9.40105,800
2021-12-14$8.79$8.79293,300
2021-12-13$9.14$9.14148,100
2021-12-10$9.76$9.76126,100
2021-12-09$9.35$9.35115,900
2021-12-08$9.10$9.10192,500
2021-12-07$9.30$9.30331,000
2021-12-06$8.62$8.62253,000
2021-12-03$8.96$8.96218,900
2021-12-02$9.37$9.37190,700
2021-12-01$9.57$9.57101,100
2021-11-30$9.90$9.90179,100
2021-11-29$10.37$10.37127,500
2021-11-26$10.66$10.66100,300
2021-11-24$10.42$10.4282,800
2021-11-23$10.27$10.27142,600
2021-11-22$10.57$10.57285,300
2021-11-19$11.03$11.03189,400
2021-11-18$11.20$11.20979,200
2021-11-17$15.26$15.26298,100
2021-11-16$15.43$15.43164,500
2021-11-15$15.51$15.51117,000
2021-11-12$15.43$15.43108,200
2021-11-11$15.22$15.22123,800
2021-11-10$14.52$14.5271,800
2021-11-09$15.06$15.0698,600
2021-11-08$15.44$15.44109,500
2021-11-05$15.02$15.0297,600
2021-11-04$14.94$14.94116,100
2021-11-03$14.72$14.72102,300
2021-11-02$15.02$15.0275,900
2021-11-01$14.88$14.88143,400
2021-10-29$15.02$15.02227,400
2021-10-28$14.85$14.85908,900
2021-10-27$12.44$12.44155,400
2021-10-26$12.33$12.33165,900
2021-10-25$11.84$11.8459,900
2021-10-22$11.74$11.7428,000
2021-10-21$12.01$12.0171,000
2021-10-20$12.13$12.1368,700
2021-10-19$12.03$12.0331,400
2021-10-18$11.86$11.8674,200
2021-10-15$11.69$11.6944,200
2021-10-14$11.74$11.7436,300
2021-10-13$11.69$11.6965,400
2021-10-12$11.16$11.1650,700
2021-10-11$11.20$11.2052,400
2021-10-08$11.18$11.1835,800
2021-10-07$11.28$11.2834,200
2021-10-06$11.13$11.1354,500
2021-10-05$11.24$11.2471,200
2021-10-04$11.18$11.1879,700
2021-10-01$11.70$11.7078,000
2021-09-30$11.43$11.43159,000
2021-09-29$11.21$11.2155,500
2021-09-28$11.60$11.60110,700
2021-09-27$11.75$11.75182,500
2021-09-24$11.71$11.7152,000
2021-09-23$11.99$11.9991,000
2021-09-22$11.78$11.78101,400
2021-09-21$12.00$12.0068,700
2021-09-20$11.98$11.98199,500
2021-09-17$12.50$12.50140,500
2021-09-16$12.47$12.47144,400
2021-09-15$12.33$12.33163,200
2021-09-14$11.53$11.53170,900
2021-09-13$11.56$11.56117,700
2021-09-10$11.53$11.53192,400
2021-09-09$10.68$10.6847,800
2021-09-08$10.48$10.48103,500
2021-09-07$10.61$10.61121,800
2021-09-03$10.48$10.4831,400
2021-09-02$10.38$10.3895,100
2021-09-01$10.20$10.2041,600
2021-08-31$10.34$10.3428,400
2021-08-30$10.28$10.2879,400
2021-08-27$10.01$10.0192,100
2021-08-26$9.82$9.8225,800
2021-08-25$9.88$9.8816,600
2021-08-24$10.05$10.0525,900
2021-08-23$9.99$9.9953,500
2021-08-20$9.70$9.7031,900
2021-08-19$9.64$9.6436,400
2021-08-18$9.70$9.7043,500
2021-08-17$9.34$9.3453,900
2021-08-16$9.42$9.4232,300
2021-08-13$9.71$9.7152,900
2021-08-12$9.99$9.9995,800
2021-08-11$10.22$10.2286,500
2021-08-10$10.18$10.1843,500
2021-08-09$10.25$10.2574,100
2021-08-06$9.79$9.7929,700
2021-08-05$9.72$9.72155,700
2021-08-04$9.90$9.9052,900
2021-08-03$9.75$9.75244,700
2021-08-02$10.12$10.1243,300
2021-07-30$10.36$10.3667,800
2021-07-29$9.85$9.8544,000
2021-07-28$9.84$9.8485,800
2021-07-27$9.05$9.0573,700
2021-07-26$9.44$9.4439,300
2021-07-23$9.49$9.4924,000
2021-07-22$9.41$9.4157,100
2021-07-21$9.82$9.8245,400
2021-07-20$9.35$9.3571,700
2021-07-19$8.88$8.8895,700
2021-07-16$9.08$9.0849,900
2021-07-15$9.35$9.35202,100
2021-07-14$9.75$9.75129,600
2021-07-13$9.39$9.3962,300
2021-07-12$9.33$9.3368,900
2021-07-09$9.14$9.1443,200
2021-07-08$8.90$8.9084,800
2021-07-07$9.23$9.2372,200
2021-07-06$9.21$9.2148,400
2021-07-02$9.13$9.1342,900
2021-07-01$9.50$9.5070,400
2021-06-30$9.64$9.6480,800
2021-06-29$9.47$9.4733,500
2021-06-28$9.30$9.3052,600
2021-06-25$9.27$9.2792,800
2021-06-24$9.33$9.33338,100
2021-06-23$8.84$8.84131,400
2021-06-22$8.79$8.79168,200
2021-06-21$8.93$8.93104,400
2021-06-18$9.14$9.1481,200
2021-06-17$9.59$9.5998,500
2021-06-16$9.80$9.80102,400
2021-06-15$9.87$9.87102,000
2021-06-14$10.07$10.07169,800
2021-06-11$9.74$9.7453,000
2021-06-10$9.68$9.6895,400
2021-06-09$9.76$9.76146,900
2021-06-08$9.84$9.8492,500
2021-06-07$9.80$9.8089,700
2021-06-04$9.83$9.8356,600
2021-06-03$9.76$9.7679,900
2021-06-02$10.11$10.11128,900
2021-06-01$10.31$10.3189,800
2021-05-28$10.44$10.44113,900
2021-05-27$10.22$10.2272,200
2021-05-26$10.15$10.15157,900
2021-05-25$9.39$9.3973,400
2021-05-24$9.58$9.58134,900
2021-05-21$9.03$9.03345,000
2021-05-20$8.97$8.97114,100
2021-05-19$9.02$9.02222,800
2021-05-18$8.94$8.94115,200
2021-05-17$8.91$8.91101,300
2021-05-14$9.19$9.19226,400
2021-05-13$9.00$9.00227,700
2021-05-12$9.18$9.1891,200
2021-05-11$9.62$9.62157,800
2021-05-10$9.53$9.53414,000
2021-05-07$9.84$9.84160,900
2021-05-06$10.00$10.00678,100
2021-05-05$10.48$10.48196,900
2021-05-04$10.14$10.14163,100
2021-05-03$10.69$10.69175,900
2021-04-30$10.54$10.5485,800
2021-04-29$10.94$10.94316,300
2021-04-28$11.04$11.04103,600
2021-04-27$11.42$11.42214,400
2021-04-26$10.77$10.77137,900
2021-04-23$10.66$10.66227,400
2021-04-22$10.25$10.25132,600
2021-04-21$10.52$10.52127,600
2021-04-20$10.06$10.06212,500
2021-04-19$10.55$10.55162,300
2021-04-16$11.00$11.00146,500
2021-04-15$10.90$10.90349,000
2021-04-14$11.43$11.43165,400
2021-04-13$11.82$11.82188,200
2021-04-12$11.61$11.61268,100
2021-04-09$12.37$12.37233,500
2021-04-08$13.06$13.06224,600
2021-04-07$13.28$13.28237,900
2021-04-06$14.13$14.13337,800
2021-04-05$13.80$13.80493,000
2021-04-01$12.79$12.79270,300
2021-03-31$11.82$11.8298,800
2021-03-30$11.46$11.46108,200
2021-03-29$11.78$11.78198,000
2021-03-26$11.83$11.83179,700
2021-03-25$11.09$11.09382,900
2021-03-24$11.23$11.23143,600
2021-03-23$11.35$11.35244,400
2021-03-22$11.51$11.51210,000
2021-03-19$11.85$11.85440,300
2021-03-18$11.47$11.47353,400
2021-03-17$12.03$12.03396,700
2021-03-16$12.24$12.24213,500
2021-03-15$12.05$12.05310,200
2021-03-12$12.32$12.321,171,600
2021-03-11$11.80$11.80339,300
2021-03-10$10.87$10.87285,100
2021-03-09$10.69$10.69322,800
2021-03-08$8.83$8.83122,200
2021-03-05$9.01$9.01172,200
2021-03-04$9.09$9.09220,700
2021-03-03$9.47$9.47124,000
2021-03-02$9.97$9.97160,500
2021-03-01$10.16$10.16247,900
2021-02-26$9.59$9.59146,500
2021-02-25$9.67$9.67129,100
2021-02-24$10.14$10.14267,700
2021-02-23$9.97$9.97191,700
2021-02-22$10.69$10.69207,100
2021-02-19$10.89$10.89145,800
2021-02-18$10.56$10.56258,300
2021-02-17$10.70$10.70255,500
2021-02-16$11.23$11.23779,900
2021-02-12$10.80$10.801,186,600
2021-02-11$8.85$8.85233,500
2021-02-10$8.58$8.58129,900
2021-02-09$8.52$8.52124,200
2021-02-08$8.38$8.38136,400
2021-02-05$7.86$7.8683,500
2021-02-04$7.81$7.8147,400
2021-02-03$7.78$7.7882,400
2021-02-02$7.41$7.4120,400
2021-02-01$7.30$7.3040,400
2021-01-29$6.99$6.9911,900
2021-01-28$7.07$7.0740,900
2021-01-27$7.10$7.1049,000
2021-01-26$7.20$7.2050,000
2021-01-25$7.36$7.3641,500
2021-01-22$7.61$7.6164,800
2021-01-21$7.64$7.6466,300
2021-01-20$7.31$7.3148,400
2021-01-19$7.25$7.2538,200
2021-01-15$7.15$7.1527,700
2021-01-14$7.22$7.22142,600
2021-01-13$7.02$7.0269,900
2021-01-12$7.24$7.24134,000
2021-01-11$6.60$6.6052,900
2021-01-08$6.62$6.6224,300
2021-01-07$6.73$6.7322,800
2021-01-06$6.51$6.5127,700
2021-01-05$6.68$6.6831,400
2021-01-04$6.36$6.3630,800