NASDAQ:ALT | Historical Stock Price | Altimmune, 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
2017-05-26 to 2026-09-04
Data captured

Stock Price Chart

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

$1.48$3.68$9.14$22.69$56.33$139.862017-05-262026-08-27

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

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Historical Stock Price — 2025

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2025-12-31$3.61$3.614,293,100
2025-12-30$3.61$3.613,158,400
2025-12-29$3.68$3.684,528,500
2025-12-26$3.86$3.862,924,300
2025-12-24$3.98$3.982,079,900
2025-12-23$4.00$4.004,440,900
2025-12-22$4.14$4.146,879,400
2025-12-19$3.90$3.9022,528,400
2025-12-18$5.05$5.052,860,200
2025-12-17$5.09$5.092,877,200
2025-12-16$5.03$5.034,613,800
2025-12-15$5.28$5.283,707,900
2025-12-12$5.27$5.276,381,900
2025-12-11$5.34$5.342,785,800
2025-12-10$5.43$5.433,354,500
2025-12-09$5.52$5.524,808,200
2025-12-08$5.61$5.615,549,200
2025-12-05$5.24$5.242,583,800
2025-12-04$5.31$5.313,112,700
2025-12-03$5.11$5.112,566,400
2025-12-02$4.76$4.763,021,000
2025-12-01$4.93$4.934,393,600
2025-11-28$5.26$5.262,119,800
2025-11-26$5.17$5.172,561,300
2025-11-25$5.14$5.143,326,100
2025-11-24$5.10$5.104,683,600
2025-11-21$4.81$4.813,481,400
2025-11-20$4.47$4.472,995,100
2025-11-19$4.59$4.594,030,800
2025-11-18$4.65$4.654,334,200
2025-11-17$4.19$4.192,313,700
2025-11-14$4.17$4.172,628,400
2025-11-13$4.06$4.062,434,000
2025-11-12$4.23$4.232,374,100
2025-11-11$4.28$4.282,977,000
2025-11-10$4.26$4.266,038,100
2025-11-07$4.11$4.114,258,000
2025-11-06$3.94$3.944,248,600
2025-11-05$3.75$3.752,647,500
2025-11-04$3.76$3.763,175,000
2025-11-03$3.96$3.962,188,900
2025-10-31$4.05$4.052,447,400
2025-10-30$4.07$4.074,023,700
2025-10-29$4.00$4.002,310,200
2025-10-28$4.06$4.061,746,300
2025-10-27$4.14$4.142,921,900
2025-10-24$3.95$3.951,931,900
2025-10-23$3.96$3.961,944,700
2025-10-22$3.90$3.902,698,800
2025-10-21$4.04$4.042,284,600
2025-10-20$4.00$4.003,013,300
2025-10-17$3.83$3.832,133,700
2025-10-16$3.89$3.892,826,400
2025-10-15$4.00$4.002,277,100
2025-10-14$3.97$3.972,010,500
2025-10-13$4.00$4.003,098,500
2025-10-10$3.92$3.922,649,500
2025-10-09$4.00$4.002,847,800
2025-10-08$3.93$3.937,869,400
2025-10-07$3.93$3.931,873,700
2025-10-06$4.01$4.012,485,400
2025-10-03$3.91$3.912,560,100
2025-10-02$3.93$3.932,098,400
2025-10-01$3.87$3.873,045,300
2025-09-30$3.77$3.772,667,100
2025-09-29$3.79$3.793,181,000
2025-09-26$4.00$4.002,499,800
2025-09-25$3.92$3.923,222,500
2025-09-24$3.92$3.921,956,100
2025-09-23$3.79$3.791,795,200
2025-09-22$3.96$3.963,106,000
2025-09-19$3.78$3.784,438,100
2025-09-18$3.87$3.876,514,900
2025-09-17$3.57$3.571,991,500
2025-09-16$3.63$3.631,919,300
2025-09-15$3.59$3.592,061,800
2025-09-12$3.64$3.641,764,600
2025-09-11$3.69$3.692,068,500
2025-09-10$3.67$3.671,673,000
2025-09-09$3.78$3.781,552,600
2025-09-08$3.71$3.711,513,800
2025-09-05$3.78$3.782,657,500
2025-09-04$3.56$3.561,733,200
2025-09-03$3.68$3.681,599,800
2025-09-02$3.75$3.752,601,500
2025-08-29$3.83$3.832,752,200
2025-08-28$3.71$3.714,097,000
2025-08-27$3.67$3.675,196,700
2025-08-26$3.44$3.441,728,200
2025-08-25$3.39$3.392,624,000
2025-08-22$3.54$3.542,836,100
2025-08-21$3.53$3.531,918,500
2025-08-20$3.63$3.632,242,500
2025-08-19$3.62$3.625,046,100
2025-08-18$3.56$3.562,915,300
2025-08-15$3.63$3.633,043,400
2025-08-14$3.68$3.682,888,900
2025-08-13$3.74$3.743,960,700
2025-08-12$3.62$3.625,396,900
2025-08-11$3.38$3.382,786,600
2025-08-08$3.45$3.452,308,100
2025-08-07$3.52$3.522,430,000
2025-08-06$3.60$3.601,786,200
2025-08-05$3.67$3.672,536,100
2025-08-04$3.58$3.581,888,400
2025-08-01$3.61$3.611,814,200
2025-07-31$3.69$3.692,735,600
2025-07-30$3.65$3.653,318,100
2025-07-29$3.83$3.833,781,300
2025-07-28$4.03$4.032,211,100
2025-07-25$4.08$4.082,969,000
2025-07-24$4.11$4.112,015,100
2025-07-23$4.29$4.295,002,900
2025-07-22$4.20$4.203,266,400
2025-07-21$4.05$4.053,014,900
2025-07-18$4.08$4.083,496,400
2025-07-17$4.05$4.054,987,000
2025-07-16$4.18$4.182,666,600
2025-07-15$4.18$4.182,839,000
2025-07-14$4.26$4.262,759,600
2025-07-11$4.14$4.144,159,200
2025-07-10$4.40$4.409,363,200
2025-07-09$4.74$4.743,881,000
2025-07-08$4.58$4.583,681,000
2025-07-07$4.43$4.436,127,400
2025-07-03$4.76$4.766,331,600
2025-07-02$4.90$4.9014,705,200
2025-07-01$4.23$4.2311,555,300
2025-06-30$3.87$3.8719,100,500
2025-06-27$3.50$3.5020,035,700
2025-06-26$3.61$3.6186,115,500
2025-06-25$7.71$7.715,498,100
2025-06-24$7.19$7.194,276,200
2025-06-23$6.99$6.995,564,400
2025-06-20$7.03$7.037,871,800
2025-06-18$6.78$6.785,719,600
2025-06-17$6.89$6.894,107,500
2025-06-16$6.87$6.874,153,100
2025-06-13$6.92$6.924,336,500
2025-06-12$7.15$7.156,645,800
2025-06-11$6.54$6.543,852,600
2025-06-10$6.74$6.747,966,500
2025-06-09$5.95$5.952,766,200
2025-06-06$5.62$5.623,875,200
2025-06-05$5.46$5.462,297,800
2025-06-04$5.49$5.494,201,600
2025-06-03$5.42$5.422,502,800
2025-06-02$5.30$5.302,508,800
2025-05-30$5.43$5.433,980,900
2025-05-29$5.61$5.611,411,800
2025-05-28$5.49$5.491,424,800
2025-05-27$5.51$5.512,435,400
2025-05-23$5.71$5.711,652,600
2025-05-22$5.77$5.771,473,800
2025-05-21$5.59$5.592,179,600
2025-05-20$5.85$5.852,014,900
2025-05-19$5.50$5.501,503,000
2025-05-16$5.58$5.582,140,900
2025-05-15$5.78$5.781,726,500
2025-05-14$5.70$5.702,189,100
2025-05-13$5.76$5.764,604,000
2025-05-12$6.01$6.012,976,900
2025-05-09$5.59$5.592,850,800
2025-05-08$5.80$5.802,611,000
2025-05-07$5.36$5.362,039,700
2025-05-06$5.03$5.032,904,900
2025-05-05$5.43$5.432,169,800
2025-05-02$5.77$5.774,884,200
2025-05-01$5.17$5.172,094,700
2025-04-30$5.25$5.251,804,900
2025-04-29$5.10$5.101,613,200
2025-04-28$5.06$5.061,770,400
2025-04-25$5.07$5.071,025,200
2025-04-24$5.17$5.171,474,300
2025-04-23$4.97$4.971,723,700
2025-04-22$4.85$4.851,814,300
2025-04-21$4.79$4.792,221,200
2025-04-17$4.55$4.552,101,800
2025-04-16$4.40$4.401,056,900
2025-04-15$4.53$4.531,285,300
2025-04-14$4.63$4.632,290,900
2025-04-11$4.41$4.411,421,700
2025-04-10$4.16$4.162,120,900
2025-04-09$4.23$4.234,003,000
2025-04-08$3.67$3.672,775,400
2025-04-07$3.98$3.983,564,900
2025-04-04$4.24$4.242,987,700
2025-04-03$4.46$4.462,015,000
2025-04-02$4.78$4.782,842,800
2025-04-01$4.75$4.752,395,000
2025-03-31$5.00$5.003,598,900
2025-03-28$5.32$5.321,339,600
2025-03-27$5.57$5.571,624,700
2025-03-26$5.59$5.591,426,700
2025-03-25$5.89$5.891,589,700
2025-03-24$6.05$6.052,299,700
2025-03-21$5.81$5.812,037,600
2025-03-20$5.78$5.781,706,600
2025-03-19$5.81$5.811,743,800
2025-03-18$5.61$5.612,530,000
2025-03-17$5.97$5.975,880,000
2025-03-14$5.92$5.9212,203,900
2025-03-13$5.20$5.202,931,700
2025-03-12$5.55$5.553,033,600
2025-03-11$5.26$5.263,241,000
2025-03-10$5.46$5.462,295,200
2025-03-07$5.57$5.572,392,200
2025-03-06$5.59$5.592,997,300
2025-03-05$5.72$5.723,508,400
2025-03-04$5.96$5.962,811,700
2025-03-03$5.99$5.992,646,500
2025-02-28$6.65$6.653,370,900
2025-02-27$6.42$6.424,447,500
2025-02-26$5.94$5.941,932,200
2025-02-25$5.91$5.912,369,900
2025-02-24$6.11$6.112,025,200
2025-02-21$6.43$6.431,639,100
2025-02-20$6.63$6.631,694,200
2025-02-19$6.78$6.783,628,300
2025-02-18$6.48$6.482,525,000
2025-02-14$6.37$6.372,431,100
2025-02-13$6.23$6.232,066,600
2025-02-12$6.22$6.222,011,000
2025-02-11$6.29$6.292,581,000
2025-02-10$6.61$6.611,565,700
2025-02-07$6.66$6.661,443,600
2025-02-06$6.91$6.911,518,600
2025-02-05$6.99$6.991,751,900
2025-02-04$6.64$6.641,359,200
2025-02-03$6.44$6.442,051,500
2025-01-31$6.64$6.642,014,400
2025-01-30$7.00$7.001,575,600
2025-01-29$6.95$6.952,931,800
2025-01-28$6.93$6.931,469,300
2025-01-27$7.00$7.002,144,700
2025-01-24$6.98$6.982,355,300
2025-01-23$7.06$7.061,570,600
2025-01-22$6.94$6.941,715,300
2025-01-21$6.83$6.831,321,500
2025-01-17$6.86$6.861,697,000
2025-01-16$6.71$6.711,609,100
2025-01-15$6.58$6.582,206,200
2025-01-14$6.23$6.233,743,900
2025-01-13$6.78$6.781,855,100
2025-01-10$6.87$6.873,895,800
2025-01-08$7.45$7.452,751,100
2025-01-07$7.31$7.312,242,600
2025-01-06$7.25$7.252,795,300
2025-01-03$7.26$7.262,727,800
2025-01-02$7.11$7.112,405,700