NASDAQ:ALEC | Historical Stock Price | Alector, 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
2019-02-07 to 2026-09-04
Data captured

Stock Price Chart

Blue: Split-adjusted close · Orange: Cumulative dividend-reinvested close

$0.86$1.86$4.03$8.75$18.96$41.092019-02-072026-08-27

Logarithmic scale. Both lines share the same starting value for the selected range.

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Historical Stock Price — 2019

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2019-12-31$17.23$17.23277,900——
2019-12-30$16.87$16.87219,200——
2019-12-27$17.60$17.60309,700——
2019-12-26$18.17$18.17224,500——
2019-12-24$19.50$19.50232,700——
2019-12-23$19.50$19.50481,300——
2019-12-20$19.50$19.502,309,100——
2019-12-19$19.54$19.54304,300——
2019-12-18$19.32$19.32453,500——
2019-12-17$20.19$20.19235,100——
2019-12-16$20.30$20.30334,400——
2019-12-13$20.21$20.21224,200——
2019-12-12$19.93$19.93300,300——
2019-12-11$19.11$19.11167,000——
2019-12-10$19.55$19.55236,500——
2019-12-09$19.63$19.63253,200——
2019-12-06$19.76$19.76447,700——
2019-12-05$19.39$19.39268,400——
2019-12-04$19.62$19.62350,600——
2019-12-03$19.44$19.44321,900——
2019-12-02$18.62$18.62431,000——
2019-11-29$18.64$18.64194,000——
2019-11-27$18.92$18.92415,700——
2019-11-26$18.16$18.161,528,600——
2019-11-25$16.51$16.51749,200——
2019-11-22$15.84$15.84339,100——
2019-11-21$15.83$15.83404,000——
2019-11-20$15.80$15.80516,000——
2019-11-19$15.48$15.48262,000——
2019-11-18$15.87$15.87264,100——
2019-11-15$15.98$15.98871,400——
2019-11-14$15.51$15.51447,700——
2019-11-13$15.66$15.66253,700——
2019-11-12$16.31$16.31286,200——
2019-11-11$16.68$16.68282,100——
2019-11-08$17.11$17.11170,900——
2019-11-07$17.85$17.85234,000——
2019-11-06$17.15$17.15145,800——
2019-11-05$17.10$17.10219,100——
2019-11-04$17.25$17.25144,100——
2019-11-01$16.84$16.84253,400——
2019-10-31$16.84$16.84267,500——
2019-10-30$17.38$17.38227,700——
2019-10-29$16.94$16.94223,900——
2019-10-28$16.19$16.19185,800——
2019-10-25$16.00$16.00252,100——
2019-10-24$15.95$15.95247,600——
2019-10-23$16.12$16.12198,900——
2019-10-22$16.00$16.00328,000——
2019-10-21$15.01$15.01140,800——
2019-10-18$14.39$14.38163,400——
2019-10-17$15.05$15.05138,300——
2019-10-16$14.89$14.89154,500——
2019-10-15$14.71$14.71193,100——
2019-10-14$14.68$14.68176,900——
2019-10-11$15.02$15.02298,000——
2019-10-10$14.53$14.53223,800——
2019-10-09$14.17$14.17246,500——
2019-10-08$14.26$14.26167,300——
2019-10-07$14.75$14.75183,200——
2019-10-04$14.51$14.51227,400——
2019-10-03$14.48$14.48216,400——
2019-10-02$14.38$14.38356,200——
2019-10-01$14.20$14.20222,000——
2019-09-30$14.42$14.42357,800——
2019-09-27$15.02$15.02482,300——
2019-09-26$15.11$15.11320,600——
2019-09-25$16.93$16.93420,300——
2019-09-24$17.88$17.88633,700——
2019-09-23$19.09$19.09936,000——
2019-09-20$19.92$19.923,273,500——
2019-09-19$18.50$18.50798,200——
2019-09-18$19.23$19.23992,200——
2019-09-17$19.59$19.59384,000——
2019-09-16$19.37$19.37389,400——
2019-09-13$18.99$18.99425,000——
2019-09-12$19.56$19.56386,900——
2019-09-11$19.80$19.80390,600——
2019-09-10$19.23$19.23652,600——
2019-09-09$17.32$17.32458,500——
2019-09-06$16.54$16.54199,900——
2019-09-05$16.60$16.60235,100——
2019-09-04$16.14$16.14346,300——
2019-09-03$15.53$15.53299,100——
2019-08-30$16.46$16.46289,800——
2019-08-29$16.61$16.61328,000——
2019-08-28$16.18$16.18319,300——
2019-08-27$15.66$15.66335,100——
2019-08-26$16.11$16.11567,900——
2019-08-23$15.00$15.00182,000——
2019-08-22$15.14$15.14244,800——
2019-08-21$15.84$15.84191,100——
2019-08-20$16.00$16.00355,600——
2019-08-19$15.73$15.73365,300——
2019-08-16$14.85$14.85311,800——
2019-08-15$14.86$14.86436,200——
2019-08-14$15.20$15.20427,300——
2019-08-13$17.80$17.80286,400——
2019-08-12$18.58$18.58309,900——
2019-08-09$18.10$18.10443,600——
2019-08-08$17.77$17.77573,100——
2019-08-07$18.39$18.39142,600——
2019-08-06$19.00$19.00433,100——
2019-08-05$18.40$18.40279,800——
2019-08-02$19.90$19.90179,300——
2019-08-01$20.08$20.08280,100——
2019-07-31$21.12$21.12210,100——
2019-07-30$21.62$21.62517,200——
2019-07-29$22.20$22.20165,100——
2019-07-26$20.99$20.99194,000——
2019-07-25$20.86$20.86424,400——
2019-07-24$19.88$19.88162,300——
2019-07-23$19.24$19.2487,200——
2019-07-22$18.91$18.9186,700——
2019-07-19$18.84$18.8499,200——
2019-07-18$18.75$18.75257,000——
2019-07-17$18.23$18.23151,200——
2019-07-16$19.04$19.04213,400——
2019-07-15$19.00$19.0087,400——
2019-07-12$18.52$18.5262,100——
2019-07-11$18.76$18.76106,700——
2019-07-10$19.00$19.00123,000——
2019-07-09$18.81$18.81102,800——
2019-07-08$19.03$19.03135,900——
2019-07-05$19.06$19.06140,000——
2019-07-03$18.59$18.5949,100——
2019-07-02$19.57$19.5794,200——
2019-07-01$18.88$18.8894,600——
2019-06-28$19.00$19.00660,500——
2019-06-27$17.99$17.9952,200——
2019-06-26$17.50$17.5094,400——
2019-06-25$17.82$17.8269,200——
2019-06-24$18.23$18.23103,700——
2019-06-21$18.20$18.20388,900——
2019-06-20$18.33$18.33103,100——
2019-06-19$19.12$19.1276,000——
2019-06-18$19.53$19.5399,800——
2019-06-17$20.35$20.35154,900——
2019-06-14$20.16$20.16168,100——
2019-06-13$20.73$20.73132,400——
2019-06-12$20.10$20.10138,500——
2019-06-11$20.27$20.27104,400——
2019-06-10$19.00$19.00332,000——
2019-06-07$17.35$17.35105,600——
2019-06-06$16.96$16.9686,500——
2019-06-05$16.81$16.8193,300——
2019-06-04$16.98$16.9866,800——
2019-06-03$16.26$16.26104,200——
2019-05-31$16.91$16.9178,600——
2019-05-30$17.35$17.3583,000——
2019-05-29$17.87$17.8781,800——
2019-05-28$18.84$18.8477,500——
2019-05-24$19.50$19.5052,400——
2019-05-23$18.98$18.9850,200——
2019-05-22$19.53$19.5374,200——
2019-05-21$19.74$19.7484,600——
2019-05-20$19.61$19.6188,400——
2019-05-17$20.31$20.31147,700——
2019-05-16$20.97$20.97185,000——
2019-05-15$21.83$21.83111,800——
2019-05-14$21.04$21.04163,700——
2019-05-13$19.82$19.82209,000——
2019-05-10$20.05$20.05135,400——
2019-05-09$19.91$19.9174,300——
2019-05-08$20.35$20.3550,400——
2019-05-07$18.74$18.7467,600——
2019-05-06$20.26$20.2670,600——
2019-05-03$19.89$19.8981,800——
2019-05-02$20.50$20.50118,100——
2019-05-01$19.72$19.72103,200——
2019-04-30$19.86$19.8672,100——
2019-04-29$20.70$20.70138,000——
2019-04-26$21.36$21.3669,300——
2019-04-25$21.48$21.4855,900——
2019-04-24$21.59$21.59136,300——
2019-04-23$21.22$21.2265,000——
2019-04-22$21.40$21.40126,500——
2019-04-18$22.47$22.47155,500——
2019-04-17$21.53$21.53290,000——
2019-04-16$24.90$24.9072,900——
2019-04-15$24.69$24.69185,800——
2019-04-12$26.42$26.42820,800——
2019-04-11$24.40$24.4087,600——
2019-04-10$24.18$24.18269,500——
2019-04-09$23.48$23.48585,000——
2019-04-08$25.77$25.77291,800——
2019-04-05$24.06$24.06357,000——
2019-04-04$23.40$23.40222,200——
2019-04-03$22.30$22.30303,300——
2019-04-02$21.28$21.28389,900——
2019-04-01$19.81$19.81218,000——
2019-03-29$18.72$18.72298,500——
2019-03-28$18.04$18.04163,900——
2019-03-27$17.73$17.73147,000——
2019-03-26$19.36$19.3660,900——
2019-03-25$19.39$19.3972,300——
2019-03-22$18.05$18.05217,200——
2019-03-21$18.52$18.52383,900——
2019-03-20$18.90$18.90465,300——
2019-03-19$19.26$19.26204,000——
2019-03-18$18.81$18.81244,300——
2019-03-15$18.05$18.051,554,500——
2019-03-14$17.35$17.35307,000——
2019-03-13$16.40$16.40245,800——
2019-03-12$16.62$16.62343,100——
2019-03-11$15.97$15.97566,300——
2019-03-08$16.61$16.61529,800——
2019-03-07$17.70$17.70515,400——
2019-03-06$19.50$19.50219,900——
2019-03-05$21.02$21.02187,500——
2019-03-04$20.86$20.86426,400——
2019-03-01$21.00$21.00412,500——
2019-02-28$19.59$19.59187,900——
2019-02-27$19.92$19.92257,600——
2019-02-26$20.62$20.62211,400——
2019-02-25$21.53$21.53254,500——
2019-02-22$22.50$22.50436,800——
2019-02-21$21.41$21.41529,300——
2019-02-20$20.92$20.92405,800——
2019-02-19$20.73$20.73530,100——
2019-02-15$19.78$19.78408,900——
2019-02-14$18.80$18.80337,800——
2019-02-13$18.25$18.25957,300——
2019-02-12$17.50$17.50299,500——
2019-02-11$17.18$17.18538,600——
2019-02-08$16.30$16.301,094,100——
2019-02-07$18.08$18.083,626,100——