NASDAQ:CYCN | Historical Stock Price | Cyclerion Therapeutics, 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
2019-03-18 to 2026-09-04
Data captured

Stock Price Chart

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

$1.03$3.45$11.61$39.04$131.30$441.632019-03-182026-08-27

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

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Historical Stock Price — 2026

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2026-09-04———$4.451,051
2026-09-03———$4.593,127
2026-09-02———$4.052,216
2026-09-01———$3.707,379
2026-08-31———$3.807,608
2026-08-28———$4.00515
2026-08-27$3.99$3.9997,100$4.152,570
2026-08-26$4.15$4.1591,300$4.22594
2026-08-25$4.00$4.0077,900$3.963,369
2026-08-24$3.93$3.9390,700$4.033,989
2026-08-21$3.89$3.8965,700$4.17993
2026-08-20$4.07$4.0786,100$4.193,583
2026-08-19$4.13$4.1314,600$4.1299
2026-08-18$4.12$4.1214,600$4.109
2026-08-17$4.03$4.0315,400$3.79381
2026-08-14$3.79$3.7924,200$3.9011
2026-08-13$3.91$3.9182,900$4.084,876
2026-08-12$3.92$3.92102,500$3.683,329
2026-08-11$3.57$3.5710,500$3.59230
2026-08-10$3.58$3.588,300$3.70440
2026-08-07$3.57$3.5719,800$3.622,996
2026-08-06$3.56$3.564,500$3.61250
2026-08-05$3.55$3.5540,000$3.51997
2026-08-04$3.51$3.516,400$3.53157
2026-08-03$3.49$3.495,200——
2026-07-31$3.44$3.4415,700$3.43100
2026-07-30$3.50$3.503,500——
2026-07-29$3.50$3.5010,000$3.54529
2026-07-28$3.50$3.5018,500$3.41148
2026-07-27$3.50$3.5015,800$3.49200
2026-07-24$3.50$3.5073,400$3.61700
2026-07-23$3.62$3.625,800$3.62214
2026-07-22$3.63$3.6311,400$3.70338
2026-07-21$3.70$3.707,500$3.67226
2026-07-20$3.65$3.6520,200$3.58540
2026-07-17$3.64$3.6418,100——
2026-07-16$3.66$3.6611,400——
2026-07-15$3.71$3.7123,100——
2026-07-14$3.83$3.8330,500——
2026-07-13$3.82$3.8211,700——
2026-07-10$3.84$3.8427,600——
2026-07-09$3.93$3.93104,500——
2026-07-08$3.48$3.486,500——
2026-07-07$3.48$3.4811,200——
2026-07-06$3.46$3.465,000——
2026-07-02$3.43$3.4313,100——
2026-07-01$3.37$3.3727,500——
2026-06-30$3.39$3.3915,700——
2026-06-29$3.36$3.368,100——
2026-06-26$3.38$3.3827,900——
2026-06-25$3.17$3.1713,900——
2026-06-24$3.14$3.1441,600——
2026-06-23$3.27$3.2714,000——
2026-06-22$3.22$3.2220,200——
2026-06-18$3.20$3.2043,900——
2026-06-17$3.18$3.1820,500——
2026-06-16$3.18$3.1862,500——
2026-06-15$3.18$3.1837,000——
2026-06-12$3.25$3.2539,100——
2026-06-11$3.21$3.2121,800——
2026-06-10$3.09$3.0921,000——
2026-06-09$3.00$3.0023,900——
2026-06-08$3.01$3.0127,900——
2026-06-05$2.98$2.9824,400——
2026-06-04$3.06$3.0642,400——
2026-06-03$3.00$3.0031,600——
2026-06-02$3.02$3.0231,100——
2026-06-01$3.08$3.0827,100——
2026-05-29$3.15$3.1535,100——
2026-05-28$3.18$3.1822,800——
2026-05-27$3.15$3.1523,400——
2026-05-26$3.20$3.2029,200——
2026-05-22$3.18$3.1836,400——
2026-05-21$3.16$3.1615,500——
2026-05-20$3.08$3.0859,600——
2026-05-19$3.00$3.0038,700——
2026-05-18$3.02$3.0254,000——
2026-05-15$3.12$3.1251,400——
2026-05-14$3.09$3.09112,800——
2026-05-13$3.13$3.13143,900——
2026-05-12$3.18$3.1855,500——
2026-05-11$3.19$3.1948,400——
2026-05-08$3.10$3.1055,300——
2026-05-07$3.15$3.1586,900——
2026-05-06$3.24$3.2469,000——
2026-05-05$3.15$3.15112,600——
2026-05-04$3.26$3.2679,600——
2026-05-01$3.26$3.2664,400——
2026-04-30$3.31$3.3183,100——
2026-04-29$3.32$3.32269,600——
2026-04-28$3.04$3.0492,600——
2026-04-27$2.93$2.9392,300——
2026-04-24$2.94$2.94151,100——
2026-04-23$2.95$2.95152,500——
2026-04-22$3.06$3.06112,600——
2026-04-21$3.00$3.00148,200——
2026-04-20$3.00$3.00122,800——
2026-04-17$3.02$3.02273,200——
2026-04-16$2.98$2.98193,000——
2026-04-15$3.03$3.03186,500——
2026-04-14$3.22$3.22328,800——
2026-04-13$2.89$2.89307,700——
2026-04-10$2.91$2.91332,000——
2026-04-09$3.16$3.162,132,600——
2026-04-08$2.89$2.891,162,700——
2026-04-07$3.48$3.481,157,500——
2026-04-06$4.15$4.153,067,200——
2026-04-02$6.15$6.1511,363,100——
2026-04-01$6.38$6.38264,674,300——
2026-03-31$1.55$1.5527,600——
2026-03-30$1.45$1.4534,500——
2026-03-27$1.51$1.5131,100——
2026-03-26$1.55$1.5512,400——
2026-03-25$1.62$1.6212,000——
2026-03-24$1.64$1.6463,600——
2026-03-23$1.59$1.5931,000——
2026-03-20$1.59$1.5961,600——
2026-03-19$1.51$1.5113,400——
2026-03-18$1.46$1.4636,700——
2026-03-17$1.48$1.4834,900——
2026-03-16$1.49$1.4944,200——
2026-03-13$1.45$1.4518,800——
2026-03-12$1.42$1.4214,400——
2026-03-11$1.43$1.4338,500——
2026-03-10$1.47$1.4780,200——
2026-03-09$1.49$1.4954,500——
2026-03-06$1.41$1.4126,200——
2026-03-05$1.39$1.3964,800——
2026-03-04$1.39$1.3920,800——
2026-03-03$1.35$1.3549,200——
2026-03-02$1.30$1.3081,600——
2026-02-27$1.35$1.3572,000——
2026-02-26$1.31$1.3128,400——
2026-02-25$1.30$1.3024,600——
2026-02-24$1.32$1.3225,500——
2026-02-23$1.32$1.3223,000——
2026-02-20$1.34$1.348,500——
2026-02-19$1.36$1.3619,400——
2026-02-18$1.35$1.3577,800——
2026-02-17$1.24$1.2443,400——
2026-02-13$1.25$1.2558,700——
2026-02-12$1.21$1.2142,000——
2026-02-11$1.22$1.2252,800——
2026-02-10$1.17$1.1720,000——
2026-02-09$1.17$1.1782,800——
2026-02-06$1.10$1.1076,300——
2026-02-05$1.08$1.08134,800——
2026-02-04$1.24$1.2457,200——
2026-02-03$1.24$1.24189,800——
2026-02-02$1.38$1.38106,400——
2026-01-30$1.36$1.3631,800——
2026-01-29$1.37$1.3775,200——
2026-01-28$1.45$1.4553,600——
2026-01-27$1.50$1.5049,900——
2026-01-26$1.48$1.4897,800——
2026-01-23$1.54$1.541,006,600——
2026-01-22$1.38$1.3855,900——
2026-01-21$1.35$1.3559,900——
2026-01-20$1.35$1.3536,000——
2026-01-16$1.36$1.3683,200——
2026-01-15$1.36$1.36165,700——
2026-01-14$1.52$1.52122,000——
2026-01-13$1.53$1.53204,900——
2026-01-12$1.71$1.71199,900——
2026-01-09$1.65$1.65531,800——
2026-01-08$1.93$1.93887,400——
2026-01-07$1.80$1.802,313,100——
2026-01-06$1.95$1.9572,124,900——
2026-01-05$1.38$1.3812,017,200——
2026-01-02$1.34$1.3410,900——