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 — 1999

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
1999-12-31$5.00$5.0014,100——
1999-12-30$5.00$5.00213,100——
1999-12-29$4.13$4.1328,300——
1999-12-28$3.75$3.7540,900——
1999-12-27$3.88$3.8844,400——
1999-12-23$3.75$3.7521,200——
1999-12-22$3.75$3.7532,300——
1999-12-21$3.75$3.7564,700——
1999-12-20$3.69$3.69141,600——
1999-12-17$4.03$4.03589,300——
1999-12-16$3.44$3.4459,700——
1999-12-15$3.06$3.069,600——
1999-12-14$3.28$3.2891,300——
1999-12-13$3.13$3.13190,400——
1999-12-10$2.59$2.5925,600——
1999-12-09$2.47$2.4715,900——
1999-12-08$2.44$2.441,900——
1999-12-07$2.44$2.4437,300——
1999-12-06$2.44$2.443,400——
1999-12-03$2.38$2.389,700——
1999-12-02$2.50$2.5080,200——
1999-12-01$2.38$2.3833,700——
1999-11-30$2.66$2.66164,400——
1999-11-29$2.06$2.0611,700——
1999-11-26$2.25$2.253,600——
1999-11-24$2.06$2.065,500——
1999-11-23$2.06$2.061,000——
1999-11-22$2.25$2.258,100——
1999-11-19$2.13$2.1311,900——
1999-11-18$2.09$2.099,200——
1999-11-17$2.03$2.03600——
1999-11-16$2.03$2.031,700——
1999-11-15$2.00$2.004,300——
1999-11-12$2.00$2.0010,100——
1999-11-11$2.13$2.134,300——
1999-11-10$2.13$2.13400——
1999-11-09$2.19$2.19500——
1999-11-08$2.13$2.13800——
1999-11-05$2.38$2.384,100——
1999-11-04$2.38$2.38100——
1999-11-03$2.31$2.3110,400——
1999-11-02$2.19$2.192,100——
1999-11-01$2.13$2.130——
1999-10-29$2.13$2.131,700——
1999-10-28$1.94$1.941,300——
1999-10-27$2.19$2.191,000——
1999-10-26$2.06$2.061,800——
1999-10-25$1.88$1.882,000——
1999-10-22$1.88$1.88500——
1999-10-21$1.94$1.9415,200——
1999-10-20$1.91$1.914,200——
1999-10-19$1.94$1.940——
1999-10-18$1.94$1.944,400——
1999-10-15$2.00$2.002,000——
1999-10-14$2.03$2.031,200——
1999-10-13$2.00$2.001,600——
1999-10-12$2.06$2.0615,200——
1999-10-11$2.09$2.090——
1999-10-08$2.09$2.096,500——
1999-10-07$2.00$2.005,400——
1999-10-06$2.03$2.03500——
1999-10-05$2.06$2.062,500——
1999-10-04$2.06$2.065,000——
1999-10-01$2.00$2.0012,500——
1999-09-30$2.00$2.003,100——
1999-09-29$1.81$1.816,500——
1999-09-28$2.00$2.006,100——
1999-09-27$2.00$2.003,000——
1999-09-24$1.94$1.9416,200——
1999-09-23$2.13$2.138,700——
1999-09-22$2.13$2.13700——
1999-09-21$2.00$2.00500——
1999-09-20$2.06$2.0619,300——
1999-09-17$2.25$2.256,900——
1999-09-16$2.19$2.1917,800——
1999-09-15$2.38$2.3818,600——
1999-09-14$2.38$2.381,500——
1999-09-13$2.38$2.381,400——
1999-09-10$2.50$2.5024,700——
1999-09-09$2.53$2.535,500——
1999-09-08$2.66$2.66400——
1999-09-07$2.50$2.50800——
1999-09-03$2.56$2.56800——
1999-09-02$2.50$2.505,100——
1999-09-01$2.69$2.690——
1999-08-31$2.69$2.694,900——
1999-08-30$2.56$2.561,300——
1999-08-27$2.75$2.750——
1999-08-26$2.75$2.751,900——
1999-08-25$2.63$2.631,700——
1999-08-24$2.75$2.756,900——
1999-08-23$2.50$2.500——
1999-08-20$2.50$2.50800——
1999-08-19$2.50$2.509,700——
1999-08-18$2.66$2.665,700——
1999-08-17$2.72$2.7226,100——
1999-08-16$2.75$2.7541,400——
1999-08-13$2.81$2.814,000——
1999-08-12$2.75$2.7522,700——
1999-08-11$2.75$2.7544,700——
1999-08-10$2.84$2.8411,500——
1999-08-09$2.72$2.72100——
1999-08-06$2.75$2.7516,200——
1999-08-05$2.50$2.503,600——
1999-08-04$2.25$2.252,000——
1999-08-03$2.25$2.257,400——
1999-08-02$2.25$2.2512,400——
1999-07-30$2.31$2.312,900——
1999-07-29$2.38$2.3810,200——
1999-07-28$2.25$2.2517,600——
1999-07-27$2.41$2.4111,100——
1999-07-26$2.50$2.5055,300——
1999-07-23$2.63$2.636,000——
1999-07-22$2.63$2.632,000——
1999-07-21$2.63$2.6358,600——
1999-07-20$2.63$2.635,200——
1999-07-19$2.72$2.722,500——
1999-07-16$2.75$2.755,400——
1999-07-15$2.78$2.7811,500——
1999-07-14$2.69$2.69700——
1999-07-13$2.75$2.7526,800——
1999-07-12$2.88$2.886,100——
1999-07-09$2.81$2.813,000——
1999-07-08$2.88$2.88200——
1999-07-07$2.88$2.889,100——
1999-07-06$2.88$2.883,500——
1999-07-02$2.88$2.885,800——
1999-07-01$3.00$3.0013,000——
1999-06-30$2.91$2.9121,500——
1999-06-29$2.69$2.693,100——
1999-06-28$2.69$2.691,400——
1999-06-25$2.75$2.757,600——
1999-06-24$2.69$2.691,700——
1999-06-23$2.69$2.69700——
1999-06-22$2.75$2.751,900——
1999-06-21$2.63$2.63200——
1999-06-18$2.72$2.72200——
1999-06-17$2.63$2.638,800——
1999-06-16$2.69$2.692,100——
1999-06-15$2.81$2.812,400——
1999-06-14$2.75$2.753,300——
1999-06-11$2.75$2.75100——
1999-06-10$2.88$2.884,100——
1999-06-09$2.69$2.695,500——
1999-06-08$2.69$2.6915,700——
1999-06-07$3.00$3.0022,100——
1999-06-04$2.88$2.8824,900——
1999-06-03$2.63$2.6320,400——
1999-06-02$2.38$2.384,800——
1999-06-01$2.44$2.4437,700——
1999-05-28$2.25$2.254,800——
1999-05-27$2.19$2.1923,400——
1999-05-26$2.00$2.0012,100——
1999-05-25$2.06$2.0651,800——
1999-05-24$2.00$2.0046,100——
1999-05-21$2.13$2.1313,600——
1999-05-20$2.25$2.253,000——
1999-05-19$2.34$2.346,400——
1999-05-18$2.31$2.3119,200——
1999-05-17$2.13$2.1336,200——
1999-05-14$2.13$2.1333,300——
1999-05-13$2.06$2.0617,900——
1999-05-12$2.31$2.3116,700——
1999-05-11$2.50$2.5039,200——
1999-05-10$1.88$1.8824,000——
1999-05-07$1.75$1.75800——
1999-05-06$1.88$1.8822,000——
1999-05-05$1.81$1.815,200——
1999-05-04$1.81$1.8111,300——
1999-05-03$1.69$1.69200——
1999-04-30$1.69$1.697,900——
1999-04-29$1.56$1.5621,300——
1999-04-28$1.50$1.5057,400——
1999-04-27$1.56$1.5610,000——
1999-04-26$1.50$1.5022,000——
1999-04-23$1.75$1.7511,200——
1999-04-22$1.56$1.565,300——
1999-04-21$1.75$1.751,900——
1999-04-20$1.63$1.632,500——
1999-04-19$1.88$1.8810,400——
1999-04-16$1.75$1.756,800——
1999-04-15$1.75$1.75100——
1999-04-14$1.69$1.6924,400——
1999-04-13$1.56$1.5618,100——
1999-04-12$1.75$1.7549,700——
1999-04-09$1.50$1.5015,100——
1999-04-08$1.44$1.446,400——
1999-04-07$1.44$1.4416,600——
1999-04-06$1.44$1.448,900——
1999-04-05$1.44$1.4421,900——
1999-04-01$1.47$1.476,100——
1999-03-31$1.56$1.5623,200——
1999-03-30$1.63$1.636,700——
1999-03-29$1.38$1.3824,400——
1999-03-26$1.41$1.413,200——
1999-03-25$1.50$1.5020,800——
1999-03-24$1.50$1.50500——
1999-03-23$1.50$1.5014,700——
1999-03-22$1.56$1.5614,300——
1999-03-19$1.50$1.509,500——
1999-03-18$1.50$1.509,300——
1999-03-17$1.44$1.4414,500——
1999-03-16$0.94$0.94500——
1999-03-15$1.31$1.3113,600——
1999-03-12$1.31$1.3111,750——
1999-03-11$1.31$1.31550——
1999-03-10$1.38$1.386,650——
1999-03-09$1.50$1.503,150——
1999-03-08$1.31$1.314,100——
1999-03-05$1.31$1.3121,250——
1999-03-04$1.44$1.445,000——
1999-03-03$1.44$1.442,300——
1999-03-02$1.44$1.441,750——
1999-03-01$1.44$1.445,450——
1999-02-26$1.50$1.501,550——
1999-02-25$1.50$1.5016,200——
1999-02-24$1.50$1.5024,250——
1999-02-23$1.50$1.5022,300——
1999-02-22$1.50$1.5029,700——
1999-02-19$1.44$1.4414,000——
1999-02-18$1.56$1.5622,000——
1999-02-17$1.41$1.4111,000——
1999-02-16$1.50$1.5019,100——
1999-02-12$1.50$1.506,750——
1999-02-11$1.56$1.562,350——
1999-02-10$1.63$1.6315,450——
1999-02-09$1.50$1.505,900——
1999-02-08$1.69$1.6965,650——
1999-02-05$1.50$1.5015,900——
1999-02-04$1.38$1.3819,900——
1999-02-03$1.19$1.191,100——
1999-02-02$1.19$1.197,050——
1999-02-01$1.13$1.1317,950——
1999-01-29$1.25$1.253,250——
1999-01-28$1.19$1.193,300——
1999-01-27$1.25$1.2523,300——
1999-01-26$1.25$1.257,800——
1999-01-25$1.19$1.1915,550——
1999-01-22$1.19$1.1950——
1999-01-21$1.19$1.198,800——
1999-01-20$1.31$1.3135,650——
1999-01-19$1.31$1.3122,650——
1999-01-15$1.25$1.2530,850——
1999-01-14$1.31$1.317,200——
1999-01-13$1.31$1.319,300——
1999-01-12$1.31$1.318,300——
1999-01-11$1.38$1.389,300——
1999-01-08$1.38$1.3814,800——
1999-01-07$1.31$1.3186,350——
1999-01-06$1.31$1.318,950——
1999-01-05$1.25$1.257,800——
1999-01-04$1.25$1.2513,400——