NASDAQ:SION | Historical Stock Price | Sionna 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
2025-02-07 to 2026-09-04
Data captured

Stock Price Chart

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

$4.27$7.09$11.75$19.49$32.32$53.592025-02-072026-08-27

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

View year

Historical Stock Price — 2026

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2026-09-04$6.7653,532
2026-09-03$7.3647,295
2026-09-02$6.6654,709
2026-09-01$5.9744,274
2026-08-31$5.8451,467
2026-08-28$6.0133,452
2026-08-27$6.06$6.06773,900$6.1326,387
2026-08-26$6.17$6.17923,800$6.2138,130
2026-08-25$6.25$6.251,973,200$5.7474,450
2026-08-24$5.59$5.591,773,800$5.28106,165
2026-08-21$5.29$5.291,937,800$5.5454,889
2026-08-20$5.52$5.521,749,500$6.2044,597
2026-08-19$6.25$6.251,873,700$6.06105,189
2026-08-18$5.94$5.942,057,600$5.7183,781
2026-08-17$5.91$5.912,985,500$6.5188,600
2026-08-14$6.46$6.462,877,400$6.30113,873
2026-08-13$6.54$6.545,485,900$6.25223,033
2026-08-12$6.25$6.259,438,000$4.98238,118
2026-08-11$5.10$5.1014,931,100$4.50341,264
2026-08-10$4.50$4.5038,644,400$4.89837,953
2026-08-07$51.04$51.04747,500$50.4863,117
2026-08-06$49.61$49.61778,300$46.8765,727
2026-08-05$47.34$47.34757,700$49.3435,021
2026-08-04$49.94$49.94913,100$49.5650,840
2026-08-03$49.26$49.26509,000$45.9251,514
2026-07-31$47.13$47.13392,300$46.4528,663
2026-07-30$46.78$46.78353,200$45.2718,675
2026-07-29$44.81$44.81368,300$46.5317,324
2026-07-28$46.55$46.55320,200$45.8919,071
2026-07-27$45.38$45.38403,800$47.0223,414
2026-07-24$45.70$45.70654,800$44.8745,971
2026-07-23$44.06$44.06811,100$45.4670,987
2026-07-22$45.03$45.03562,900$47.0058,043
2026-07-21$47.21$47.21598,100$46.4530,904
2026-07-20$45.69$45.69816,400$50.7245,290
2026-07-17$49.41$49.411,139,300
2026-07-16$45.29$45.291,096,300
2026-07-15$44.38$44.38522,000
2026-07-14$42.59$42.59276,000
2026-07-13$43.95$43.95415,300
2026-07-10$45.29$45.29371,000
2026-07-09$44.94$44.94755,200
2026-07-08$44.00$44.00573,800
2026-07-07$44.93$44.93664,400
2026-07-06$43.12$43.12255,800
2026-07-02$43.99$43.99328,700
2026-07-01$41.64$41.64438,300
2026-06-30$43.99$43.99682,800
2026-06-29$42.97$42.97320,000
2026-06-26$42.18$42.181,019,100
2026-06-25$42.77$42.77475,600
2026-06-24$41.09$41.09546,700
2026-06-23$39.87$39.87540,400
2026-06-22$38.83$38.83416,400
2026-06-18$37.30$37.30736,800
2026-06-17$36.73$36.73406,700
2026-06-16$34.75$34.75375,100
2026-06-15$36.00$36.00278,600
2026-06-12$35.92$35.92189,600
2026-06-11$36.05$36.05399,000
2026-06-10$34.03$34.03316,900
2026-06-09$33.69$33.69320,200
2026-06-08$33.51$33.51423,800
2026-06-05$35.37$35.37461,300
2026-06-04$37.78$37.78362,900
2026-06-03$36.70$36.70319,300
2026-06-02$36.48$36.48537,800
2026-06-01$40.90$40.90400,100
2026-05-29$42.82$42.82645,300
2026-05-28$42.80$42.80416,000
2026-05-27$43.43$43.43185,500
2026-05-26$42.88$42.88188,800
2026-05-22$41.13$41.13182,600
2026-05-21$41.75$41.75236,900
2026-05-20$39.50$39.50392,300
2026-05-19$37.68$37.68313,500
2026-05-18$39.24$39.24341,500
2026-05-15$40.22$40.22273,200
2026-05-14$42.77$42.77342,400
2026-05-13$43.12$43.12529,600
2026-05-12$40.94$40.94525,200
2026-05-11$45.95$45.95670,700
2026-05-08$44.23$44.23405,300
2026-05-07$43.31$43.31777,600
2026-05-06$43.29$43.29311,300
2026-05-05$40.97$40.97321,300
2026-05-04$40.45$40.45341,500
2026-05-01$39.15$39.15212,700
2026-04-30$38.70$38.70241,700
2026-04-29$37.43$37.43317,700
2026-04-28$39.59$39.59404,700
2026-04-27$39.21$39.21623,700
2026-04-24$38.11$38.11518,000
2026-04-23$38.35$38.35449,500
2026-04-22$43.20$43.20363,500
2026-04-21$41.79$41.79366,800
2026-04-20$42.64$42.64448,000
2026-04-17$43.54$43.54508,800
2026-04-16$45.24$45.24817,600
2026-04-15$45.09$45.09768,500
2026-04-14$43.30$43.30900,100
2026-04-13$41.77$41.77382,800
2026-04-10$37.89$37.89223,100
2026-04-09$38.89$38.89352,500
2026-04-08$36.95$36.95274,400
2026-04-07$36.76$36.76373,500
2026-04-06$37.38$37.38191,900
2026-04-02$40.49$40.49527,800
2026-04-01$41.30$41.30516,300
2026-03-31$40.09$40.09569,900
2026-03-30$36.66$36.66344,200
2026-03-27$36.16$36.16497,900
2026-03-26$37.96$37.96273,800
2026-03-25$37.08$37.08285,600
2026-03-24$34.76$34.76259,600
2026-03-23$36.43$36.43346,700
2026-03-20$36.39$36.39339,200
2026-03-19$35.49$35.49218,700
2026-03-18$34.40$34.40296,000
2026-03-17$35.84$35.84243,700
2026-03-16$37.17$37.17362,400
2026-03-13$37.32$37.32320,300
2026-03-12$36.68$36.68202,200
2026-03-11$38.38$38.38186,400
2026-03-10$38.08$38.08255,400
2026-03-09$37.53$37.53318,200
2026-03-06$35.93$35.93310,400
2026-03-05$34.56$34.56611,700
2026-03-04$34.57$34.57208,000
2026-03-03$34.09$34.09220,200
2026-03-02$33.92$33.92276,000
2026-02-27$36.54$36.54183,100
2026-02-26$38.00$38.00139,800
2026-02-25$38.03$38.03197,100
2026-02-24$37.32$37.32290,800
2026-02-23$36.10$36.10102,900
2026-02-20$35.49$35.49145,500
2026-02-19$37.34$37.34181,400
2026-02-18$37.73$37.73104,500
2026-02-17$38.03$38.03117,400
2026-02-13$37.52$37.52332,900
2026-02-12$37.64$37.64199,800
2026-02-11$36.53$36.53389,700
2026-02-10$38.01$38.01321,200
2026-02-09$36.82$36.82311,900
2026-02-06$36.11$36.11440,000
2026-02-05$35.25$35.25563,000
2026-02-04$41.31$41.31332,500
2026-02-03$44.48$44.48312,300
2026-02-02$43.65$43.65911,900
2026-01-30$42.26$42.26229,500
2026-01-29$42.44$42.44212,200
2026-01-28$42.13$42.13180,700
2026-01-27$43.40$43.40107,000
2026-01-26$42.60$42.60148,400
2026-01-23$42.38$42.38199,500
2026-01-22$41.77$41.77664,400
2026-01-21$40.79$40.79192,300
2026-01-20$40.01$40.01155,300
2026-01-16$39.11$39.11264,900
2026-01-15$38.85$38.85263,800
2026-01-14$41.18$41.18280,200
2026-01-13$36.81$36.81241,200
2026-01-12$36.34$36.34191,400
2026-01-09$39.25$39.25414,400
2026-01-08$36.60$36.60406,200
2026-01-07$43.21$43.21477,300
2026-01-06$37.22$37.22266,800
2026-01-05$40.85$40.85299,800
2026-01-02$39.21$39.21318,900